[14] | 1 | /**CFile*********************************************************************** |
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| 2 | |
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| 3 | FileName [bmcCirCUs.c] |
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| 4 | |
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| 5 | PackageName [bmc] |
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| 6 | |
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| 7 | Synopsis [BMC ltl model checker using CirCUs.] |
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| 8 | |
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| 9 | Author [HoonSang Jin, Mohammad Awedh] |
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| 10 | |
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| 11 | Copyright [This file was created at the University of Colorado at Boulder. |
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| 12 | The University of Colorado at Boulder makes no warranty about the suitability |
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| 13 | of this software for any purpose. It is presented on an AS IS basis.] |
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| 14 | |
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| 15 | ******************************************************************************/ |
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| 16 | |
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| 17 | #include "bmcInt.h" |
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| 18 | #include "sat.h" |
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| 19 | #include "baig.h" |
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| 20 | |
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| 21 | static char rcsid[] UNUSED = "$Id: bmcCirCUs.c,v 1.56 2010/04/09 23:50:57 fabio Exp $"; |
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| 22 | |
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| 23 | /*---------------------------------------------------------------------------*/ |
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| 24 | /* Constant declarations */ |
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| 25 | /*---------------------------------------------------------------------------*/ |
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| 26 | |
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| 27 | /*---------------------------------------------------------------------------*/ |
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| 28 | /* Type declarations */ |
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| 29 | /*---------------------------------------------------------------------------*/ |
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| 30 | |
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| 31 | /*---------------------------------------------------------------------------*/ |
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| 32 | /* Structure declarations */ |
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| 33 | /*---------------------------------------------------------------------------*/ |
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| 34 | |
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| 35 | /*---------------------------------------------------------------------------*/ |
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| 36 | /* Variable declarations */ |
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| 37 | /*---------------------------------------------------------------------------*/ |
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| 38 | |
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| 39 | /**AutomaticStart*************************************************************/ |
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| 40 | |
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| 41 | /*---------------------------------------------------------------------------*/ |
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| 42 | /* Static function prototypes */ |
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| 43 | /*---------------------------------------------------------------------------*/ |
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| 44 | |
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| 45 | static int printSatValue(bAig_Manager_t *manager, st_table *nodeToMvfAigTable, st_table *li2index, bAigEdge_t **baigArr, array_t *nodeArr, int bound, int *prevValue); |
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| 46 | static int printSatValueAiger(bAig_Manager_t *manager, st_table *nodeToMvfAigTable, st_table *li2index, bAigEdge_t **baigArr, array_t *nodeArr, int bound, int *prevValue); |
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| 47 | static int StringCheckIsInteger(char *string, int *value); |
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| 48 | static int verifyIfConstant(bAigEdge_t property); |
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| 49 | |
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| 50 | /**AutomaticEnd***************************************************************/ |
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| 51 | |
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| 52 | /*---------------------------------------------------------------------------*/ |
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| 53 | /* Definition of exported functions */ |
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| 54 | /*---------------------------------------------------------------------------*/ |
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| 55 | |
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| 56 | /*---------------------------------------------------------------------------*/ |
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| 57 | /* Definition of internal functions */ |
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| 58 | /*---------------------------------------------------------------------------*/ |
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| 59 | |
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| 60 | /**Function******************************************************************** |
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| 61 | |
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| 62 | Synopsis [Apply Bounded Model Checking (BMC) technique on a propositional |
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| 63 | formula.] |
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| 64 | |
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| 65 | Description [If the property dos not hold in any initial state, the |
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| 66 | property holds. |
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| 67 | |
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| 68 | Note: Before calling this function, the LTL formula must be negated. |
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| 69 | |
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| 70 | ] |
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| 71 | |
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| 72 | SideEffects [] |
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| 73 | |
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| 74 | SeeAlso [] |
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| 75 | |
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| 76 | ******************************************************************************/ |
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| 77 | void |
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| 78 | BmcCirCUsLtlVerifyProp( |
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| 79 | Ntk_Network_t *network, |
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| 80 | Ctlsp_Formula_t *ltl, |
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| 81 | st_table *coiTable, |
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| 82 | BmcOption_t *options) |
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| 83 | { |
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| 84 | mAig_Manager_t *manager = Ntk_NetworkReadMAigManager(network); |
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| 85 | st_table *nodeToMvfAigTable = NIL(st_table); |
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| 86 | long startTime, endTime; |
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| 87 | bAigEdge_t property; |
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| 88 | int satFlag; |
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| 89 | satInterface_t *interface; |
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| 90 | array_t *objArray; |
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| 91 | |
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| 92 | assert(Ctlsp_isPropositionalFormula(ltl)); |
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| 93 | |
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| 94 | startTime = util_cpu_ctime(); |
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| 95 | if (options->verbosityLevel >= BmcVerbosityNone_c){ |
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| 96 | fprintf(vis_stdout, "LTL formula is propositional\n"); |
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| 97 | } |
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| 98 | property = BmcCirCUsCreatebAigOfPropFormulaOriginal(network, manager, ltl); |
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| 99 | if (property == mAig_NULL){ |
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| 100 | return; |
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| 101 | } |
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| 102 | if (verifyIfConstant(property)){ |
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| 103 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
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| 104 | fprintf(vis_stdout, "-- bmc time = %10g\n", |
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| 105 | (double)(util_cpu_ctime() - startTime) / 1000.0); |
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| 106 | } |
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| 107 | return; |
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| 108 | } |
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| 109 | |
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| 110 | nodeToMvfAigTable = (st_table *) Ntk_NetworkReadApplInfo(network, |
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| 111 | MVFAIG_NETWORK_APPL_KEY); |
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| 112 | assert(nodeToMvfAigTable != NIL(st_table)); |
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| 113 | |
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| 114 | interface = 0; |
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| 115 | objArray = array_alloc(bAigEdge_t, 0); |
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| 116 | bAig_ExpandTimeFrame(network, manager, 1, BMC_INITIAL_STATES); |
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| 117 | property = BmcCirCUsCreatebAigOfPropFormula(network, manager, |
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| 118 | 0, ltl, BMC_INITIAL_STATES); |
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| 119 | array_insert(bAigEdge_t, objArray, 0, property); |
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| 120 | options->cnfPrefix = 0; |
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| 121 | interface = BmcCirCUsInterfaceWithObjArr(manager, network, |
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| 122 | objArray, NIL(array_t), |
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| 123 | options, interface); |
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| 124 | satFlag = interface->status; |
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| 125 | sat_FreeInterface(interface); |
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| 126 | |
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| 127 | if(satFlag == SAT_SAT) { |
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| 128 | fprintf(vis_stdout, "# BMC: formula failed\n"); |
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| 129 | if(options->dbgLevel == 1){ |
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| 130 | fprintf(vis_stdout, "# BMC: found a counterexample of length 0\n"); |
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| 131 | BmcCirCUsPrintCounterExample(network, nodeToMvfAigTable, coiTable, 0, 0, |
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| 132 | options, BMC_INITIAL_STATES); |
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| 133 | } |
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| 134 | if(options->dbgLevel == 2){ |
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| 135 | fprintf(vis_stdout, "# BMC: found a counterexample of length 0\n"); |
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| 136 | fprintf(vis_stdout, "# The counterexample for Structural Sat problem is incomplete.\n"); |
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| 137 | BmcCirCUsPrintCounterExampleAiger(network, nodeToMvfAigTable, coiTable, 0, 0, |
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| 138 | options, BMC_INITIAL_STATES); |
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| 139 | } |
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| 140 | |
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| 141 | } |
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| 142 | else if(satFlag != SAT_SAT) { |
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| 143 | if(options->verbosityLevel != BmcVerbosityNone_c){ |
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| 144 | fprintf(vis_stdout,"# BMC: no counterexample found of length 0\n"); |
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| 145 | } |
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| 146 | fprintf(vis_stdout,"# BMC: formula passed\n"); |
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| 147 | (void) fprintf(vis_stdout, "# Termination depth = 0\n"); |
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| 148 | } |
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| 149 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
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| 150 | endTime = util_cpu_ctime(); |
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| 151 | fprintf(vis_stdout, "-- bmc time = %10g\n", (double)(endTime - startTime) / 1000.0); |
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| 152 | } |
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| 153 | array_free(objArray); |
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| 154 | fflush(vis_stdout); |
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| 155 | return; |
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| 156 | } /* BmcCirCUsLtlVerifyProp() */ |
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| 157 | |
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| 158 | |
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| 159 | /**Function******************************************************************** |
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| 160 | |
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| 161 | Synopsis [Check if the LTL formula in the form G(p) (invariant), p is a |
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| 162 | propositional formula, is an Inductive Invariant using SAT] |
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| 163 | |
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| 164 | Description [Check if the LTL formula in the form G(p), p is a |
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| 165 | propositional formula, is an Inductive Invariant |
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| 166 | |
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| 167 | An LTL formula G(p), where p is a propositional formula, is an |
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| 168 | inductive invariant if the following two conditions hold: |
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| 169 | |
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| 170 | 1- p holds in all intial states. |
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| 171 | 2- If p holds in a state s, then it also holds in all states |
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| 172 | that are reachable from s. |
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| 173 | |
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| 174 | G(p) is an inductive invariant if : |
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| 175 | SAT( I(0) and !p(0)) return UNSAT and |
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| 176 | SAT( p(i) and T(i, i+1) and !p(i+1)) returns UNSAT. |
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| 177 | |
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| 178 | Return value: |
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| 179 | 0 if the property is not an inductive invariant |
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| 180 | 1 if the property is an inductive invariant |
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| 181 | ] |
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| 182 | |
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| 183 | SideEffects [] |
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| 184 | |
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| 185 | SeeAlso [] |
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| 186 | |
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| 187 | ******************************************************************************/ |
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| 188 | int |
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| 189 | BmcCirCUsLtlCheckInductiveInvariant( |
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| 190 | Ntk_Network_t *network, |
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| 191 | Ctlsp_Formula_t *ltl, |
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| 192 | BmcOption_t *options, |
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| 193 | st_table *CoiTable) |
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| 194 | { |
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| 195 | mAig_Manager_t *manager = Ntk_NetworkReadMAigManager(network); |
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| 196 | bAigEdge_t property, result; |
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| 197 | int satFlag; |
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| 198 | satInterface_t *interface; |
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| 199 | array_t *objArray = array_alloc(bAigEdge_t, 1); |
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| 200 | int returnValue = 0; /* the property is not an inductive |
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| 201 | invariant */ |
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| 202 | /* |
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| 203 | Check if the property holds in all initial states. |
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| 204 | */ |
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| 205 | interface = 0; |
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| 206 | bAig_ExpandTimeFrame(network, manager, 1, BMC_INITIAL_STATES); |
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| 207 | property = BmcCirCUsCreatebAigOfPropFormula(network, manager, 0, ltl->right, BMC_INITIAL_STATES); |
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| 208 | |
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| 209 | array_insert(bAigEdge_t, objArray, 0, property); |
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| 210 | options->cnfPrefix = 0; |
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| 211 | interface = BmcCirCUsInterfaceWithObjArr(manager, network, objArray, |
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| 212 | NIL(array_t), options, interface); |
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| 213 | satFlag = interface->status; |
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| 214 | sat_FreeInterface(interface); |
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| 215 | |
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| 216 | if(satFlag == SAT_UNSAT) { |
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| 217 | /* |
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| 218 | Check the induction step. |
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| 219 | */ |
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| 220 | interface = 0; |
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| 221 | bAig_ExpandTimeFrame(network, manager, 2, BMC_NO_INITIAL_STATES); |
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| 222 | property = BmcCirCUsCreatebAigOfPropFormula(network, manager, 0, ltl->right, BMC_NO_INITIAL_STATES); |
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| 223 | /* |
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| 224 | The property is true at state 0. Remember that the passing property is |
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| 225 | the negation of the original property. |
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| 226 | */ |
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| 227 | result = bAig_Not(property); |
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| 228 | property = BmcCirCUsCreatebAigOfPropFormula(network, manager, 1, ltl->right, BMC_NO_INITIAL_STATES); |
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| 229 | /* |
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| 230 | The property is false at state 1 |
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| 231 | */ |
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| 232 | result = bAig_And(manager, result, property); |
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| 233 | array_insert(bAigEdge_t, objArray, 0, result); |
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| 234 | options->cnfPrefix = 1; |
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| 235 | interface = BmcCirCUsInterfaceWithObjArr(manager, network, objArray, |
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| 236 | NIL(array_t), options, interface); |
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| 237 | satFlag = interface->status; |
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| 238 | sat_FreeInterface(interface); |
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| 239 | if(satFlag == SAT_UNSAT) { |
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| 240 | returnValue = 1; /* the property is an inductive invariant */ |
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| 241 | |
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| 242 | } |
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| 243 | } |
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| 244 | array_free(objArray); |
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| 245 | return returnValue; |
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| 246 | } /* BmcCirCUsLtlCheckInductiveInvariant */ |
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| 247 | |
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| 248 | |
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| 249 | /**Function******************************************************************** |
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| 250 | |
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| 251 | Synopsis [Apply Bounded Model Checking (BMC) on an LTL formula of |
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| 252 | the form G(p), where p is a propositional formula.] |
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| 253 | |
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| 254 | Description [Given a model M, an LTL formula f = Gp, and a bound k, |
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| 255 | we first find a counterexample of length k to a state that violates |
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| 256 | p. If -r switch of the BMC command is specified, we apply the |
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| 257 | induction proof to check if the property f passes. The property f |
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| 258 | passes if there is no simple path in M that leads to a state that |
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| 259 | violates p, or no simple path in M starting at an initial state. |
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| 260 | |
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| 261 | Note: Before calling this function, the LTL formula must be negated. |
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| 262 | |
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| 263 | Using sat as SAT solver. |
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| 264 | |
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| 265 | ] |
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| 266 | |
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| 267 | SideEffects [] |
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| 268 | |
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| 269 | SeeAlso [] |
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| 270 | |
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| 271 | ******************************************************************************/ |
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| 272 | void |
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| 273 | BmcCirCUsLtlVerifyGp( |
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| 274 | Ntk_Network_t *network, |
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| 275 | Ctlsp_Formula_t *ltl, |
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| 276 | st_table *coiTable, |
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| 277 | BmcOption_t *options) |
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| 278 | { |
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| 279 | mAig_Manager_t *manager = Ntk_NetworkReadMAigManager(network); |
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| 280 | st_table *nodeToMvfAigTable = NIL(st_table); |
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| 281 | long startTime, endTime; |
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| 282 | bAigEdge_t property, result, simplePath; |
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| 283 | int j, satFlag, k; |
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| 284 | int checkInductiveInvariant; |
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| 285 | array_t *objArray; |
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| 286 | array_t *auxObjArray; |
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| 287 | satInterface_t *ceInterface, *etInterface, *tInterface; |
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| 288 | st_table *coiIndexTable; |
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| 289 | Bmc_PropertyStatus formulaStatus; |
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| 290 | |
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| 291 | assert(Ctlsp_LtlFormulaIsFp(ltl)); |
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| 292 | |
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| 293 | startTime = util_cpu_ctime(); |
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| 294 | |
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| 295 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
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| 296 | fprintf(vis_stdout, "LTL formula is of type G(p)\n"); |
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| 297 | } |
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| 298 | property = BmcCirCUsCreatebAigOfPropFormulaOriginal(network, manager, ltl->right); |
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| 299 | |
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| 300 | if (property == mAig_NULL){ |
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| 301 | return; |
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| 302 | } |
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| 303 | if (verifyIfConstant(property)){ |
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| 304 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
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| 305 | fprintf(vis_stdout, "-- bmc time = %10g\n", |
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| 306 | (double)(util_cpu_ctime() - startTime) / 1000.0); |
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| 307 | } |
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| 308 | return; |
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| 309 | } |
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| 310 | |
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| 311 | if (options->verbosityLevel >= BmcVerbosityMax_c){ |
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| 312 | (void) fprintf(vis_stdout, "\nBMC: Check if the property is an inductive invariant\n"); |
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| 313 | } |
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| 314 | checkInductiveInvariant = BmcCirCUsLtlCheckInductiveInvariant(network, ltl, options, coiTable); |
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| 315 | if (checkInductiveInvariant == 1){ |
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| 316 | (void) fprintf(vis_stdout,"# BMC: The property is an inductive invariant\n"); |
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| 317 | (void) fprintf(vis_stdout,"# BMC: formula passed\n"); |
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| 318 | (void) fprintf(vis_stdout, "# Termination depth = 0\n"); |
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| 319 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
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| 320 | fprintf(vis_stdout, "-- bmc time = %10g\n", |
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| 321 | (double)(util_cpu_ctime() - startTime) / 1000.0); |
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| 322 | } |
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| 323 | return; |
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| 324 | } |
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| 325 | |
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| 326 | nodeToMvfAigTable = (st_table *) Ntk_NetworkReadApplInfo(network, |
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| 327 | MVFAIG_NETWORK_APPL_KEY); |
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| 328 | assert(nodeToMvfAigTable != NIL(st_table)); |
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| 329 | |
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| 330 | ceInterface = 0; |
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| 331 | etInterface = 0; |
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| 332 | tInterface = 0; |
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| 333 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
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| 334 | (void)fprintf(vis_stdout, "Apply BMC on counterexample of length >= %d and <= %d (+%d)\n", |
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| 335 | options->minK, options->maxK, options->step); |
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| 336 | } |
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| 337 | /* |
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| 338 | Hold objects |
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| 339 | */ |
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| 340 | objArray = array_alloc(bAigEdge_t, 2); |
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| 341 | /* |
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| 342 | Unused entry is set to bAig_One |
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| 343 | */ |
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| 344 | array_insert(bAigEdge_t, objArray, 1, bAig_One); |
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| 345 | /* |
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| 346 | Hold auxiliary objects (constraints on the path) |
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| 347 | */ |
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| 348 | auxObjArray = array_alloc(bAigEdge_t, 0); |
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| 349 | |
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| 350 | bAig_ExpandTimeFrame(network, manager, 1, BMC_NO_INITIAL_STATES); |
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| 351 | coiIndexTable = BmcCirCUsGetCoiIndexTable(network, coiTable); |
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| 352 | |
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| 353 | formulaStatus = BmcPropertyUndecided_c; |
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| 354 | for(k = options->minK; k <= options->maxK; k += options->step){ |
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| 355 | if (options->verbosityLevel == BmcVerbosityMax_c){ |
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| 356 | fprintf(vis_stdout, "\nBMC: Generate counterexample of length %d\n", k); |
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| 357 | } |
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| 358 | /* |
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| 359 | Expand counterexample length to k. In BMC, counterexample of length k means |
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| 360 | k+1 time frames. |
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| 361 | */ |
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| 362 | bAig_ExpandTimeFrame(network, manager, k+1, BMC_INITIAL_STATES); |
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| 363 | /* |
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| 364 | The property true at any states from (k-step+1) to k |
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| 365 | */ |
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| 366 | result = bAig_Zero; |
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| 367 | for(j=k-options->step+1; j<=k; j++) { |
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| 368 | /* |
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| 369 | For k = options->minK, j goes outside the lower boundary of |
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| 370 | counterexample search. |
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| 371 | */ |
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| 372 | if(j < options->minK) continue; |
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| 373 | |
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| 374 | property = BmcCirCUsCreatebAigOfPropFormula(network, manager, j, ltl->right, BMC_INITIAL_STATES); |
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| 375 | result = bAig_Or(manager, result, property); |
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| 376 | } |
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| 377 | array_insert(bAigEdge_t, objArray, 0, result); |
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| 378 | options->cnfPrefix = k; |
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| 379 | ceInterface = BmcCirCUsInterfaceWithObjArr(manager, network, objArray, |
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| 380 | auxObjArray, options, |
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| 381 | ceInterface); |
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| 382 | satFlag = ceInterface->status; |
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| 383 | if(satFlag == SAT_SAT){ |
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| 384 | formulaStatus = BmcPropertyFailed_c; |
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| 385 | break; |
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| 386 | } |
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| 387 | /* |
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| 388 | Given that the property does not hold at all previous states. |
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| 389 | */ |
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| 390 | array_insert_last(bAigEdge_t, auxObjArray, bAig_Not(result)); |
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| 391 | |
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| 392 | /* |
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| 393 | Prove if the property passes using the induction proof of SSS0. |
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| 394 | */ |
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| 395 | if((options->inductiveStep !=0) && |
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| 396 | (k % options->inductiveStep == 0)){ |
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| 397 | array_t *auxArray; |
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| 398 | int i; |
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| 399 | |
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| 400 | if (options->verbosityLevel == BmcVerbosityMax_c) { |
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| 401 | (void) fprintf(vis_stdout, "\nBMC: Check for termination\n"); |
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| 402 | } |
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| 403 | /* |
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| 404 | Expand counterexample length to k+1. In BMC, counterexample of length k+1 means |
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| 405 | k+2 time frames. |
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| 406 | */ |
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| 407 | bAig_ExpandTimeFrame(network, manager, k+2, BMC_NO_INITIAL_STATES); |
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| 408 | simplePath = BmcCirCUsSimlePathConstraint(network, 0, k+1, nodeToMvfAigTable, |
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| 409 | coiIndexTable, BMC_NO_INITIAL_STATES); |
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| 410 | property = BmcCirCUsCreatebAigOfPropFormula(network, manager, k+1, ltl->right, |
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| 411 | BMC_NO_INITIAL_STATES); |
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| 412 | array_insert(bAigEdge_t, objArray, 0, simplePath); |
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| 413 | array_insert(bAigEdge_t, objArray, 1, property); |
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| 414 | auxArray = array_alloc(bAigEdge_t, 0); |
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| 415 | for(i=0; i<=k; i++){ |
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| 416 | array_insert_last(bAigEdge_t, auxArray, |
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| 417 | bAig_Not( |
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| 418 | BmcCirCUsCreatebAigOfPropFormula(network, manager, i, ltl->right, |
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| 419 | BMC_NO_INITIAL_STATES) |
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| 420 | )); |
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| 421 | } |
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| 422 | options->cnfPrefix = k+1; |
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| 423 | tInterface = BmcCirCUsInterfaceWithObjArr(manager, network, |
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| 424 | objArray, auxArray, |
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| 425 | options, tInterface); |
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| 426 | array_free(auxArray); |
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| 427 | array_insert(bAigEdge_t, objArray, 1, bAig_One); |
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| 428 | if(tInterface->status == SAT_UNSAT){ |
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| 429 | if (options->verbosityLevel == BmcVerbosityMax_c) { |
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| 430 | (void) fprintf(vis_stdout, |
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| 431 | "# BMC: No simple path leading to a bad state\n"); |
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| 432 | } |
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| 433 | formulaStatus = BmcPropertyPassed_c; |
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| 434 | break; |
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| 435 | } |
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| 436 | |
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| 437 | if(options->earlyTermination){ |
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| 438 | /* |
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| 439 | Early termination condition |
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| 440 | |
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| 441 | Check if there is no simple path starts from initial states |
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| 442 | |
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| 443 | */ |
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| 444 | simplePath = BmcCirCUsSimlePathConstraint(network, 0, k+1, nodeToMvfAigTable, |
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| 445 | coiIndexTable, |
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| 446 | BMC_INITIAL_STATES); |
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| 447 | array_insert(bAigEdge_t, objArray, 0, simplePath); |
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| 448 | etInterface = BmcCirCUsInterfaceWithObjArr(manager, network, |
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| 449 | objArray, NIL(array_t), |
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| 450 | options, etInterface); |
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| 451 | options->cnfPrefix = k+1; |
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| 452 | if(etInterface->status == SAT_UNSAT){ |
---|
| 453 | if (options->verbosityLevel == BmcVerbosityMax_c) { |
---|
| 454 | (void) fprintf(vis_stdout, |
---|
| 455 | "# BMC: No simple path starting at an initial state\n"); |
---|
| 456 | } |
---|
| 457 | formulaStatus = BmcPropertyPassed_c; |
---|
| 458 | break; |
---|
| 459 | } |
---|
| 460 | } |
---|
| 461 | |
---|
| 462 | } /* check for termination*/ |
---|
| 463 | } /* loop over k*/ |
---|
| 464 | array_free(objArray); |
---|
| 465 | array_free(auxObjArray); |
---|
| 466 | sat_FreeInterface(ceInterface); |
---|
| 467 | if(etInterface !=0){ |
---|
| 468 | sat_FreeInterface(etInterface); |
---|
| 469 | } |
---|
| 470 | if(tInterface !=0){ |
---|
| 471 | sat_FreeInterface(tInterface); |
---|
| 472 | } |
---|
| 473 | st_free_table(coiIndexTable); |
---|
| 474 | |
---|
| 475 | if(formulaStatus == BmcPropertyUndecided_c){ |
---|
| 476 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 477 | (void) fprintf(vis_stdout, |
---|
| 478 | "# BMC: no counterexample found of length up to %d\n", |
---|
| 479 | options->maxK); |
---|
| 480 | } |
---|
| 481 | } |
---|
| 482 | if(formulaStatus == BmcPropertyFailed_c) { |
---|
| 483 | (void) fprintf(vis_stdout, "# BMC: formula failed\n"); |
---|
| 484 | if(options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 485 | (void) fprintf(vis_stdout, |
---|
| 486 | "# BMC: Found a counterexample of length = %d \n", k); |
---|
| 487 | } |
---|
| 488 | if(options->dbgLevel == 1){ |
---|
| 489 | BmcCirCUsPrintCounterExample(network, nodeToMvfAigTable, coiTable, k, 0, |
---|
| 490 | options, BMC_INITIAL_STATES); |
---|
| 491 | } |
---|
| 492 | if(options->dbgLevel == 2){ |
---|
| 493 | BmcCirCUsPrintCounterExampleAiger(network, nodeToMvfAigTable, coiTable, k, 0, |
---|
| 494 | options, BMC_INITIAL_STATES); |
---|
| 495 | } |
---|
| 496 | } else if(formulaStatus == BmcPropertyPassed_c) { |
---|
| 497 | (void) fprintf(vis_stdout, "# BMC: formula Passed\n"); |
---|
| 498 | (void) fprintf(vis_stdout, "# Termination depth = %d\n", k); |
---|
| 499 | } else if(formulaStatus == BmcPropertyUndecided_c) { |
---|
| 500 | (void) fprintf(vis_stdout,"# BMC: formula undecided\n"); |
---|
| 501 | } |
---|
| 502 | |
---|
| 503 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 504 | endTime = util_cpu_ctime(); |
---|
| 505 | fprintf(vis_stdout, "-- bmc time = %10g\n", (double)(endTime - startTime) / 1000.0); |
---|
| 506 | } |
---|
| 507 | fflush(vis_stdout); |
---|
| 508 | |
---|
| 509 | return; |
---|
| 510 | } /* BmcCirCUsLtlVerifyGp() */ |
---|
| 511 | |
---|
| 512 | /**Function******************************************************************** |
---|
| 513 | |
---|
| 514 | Synopsis [Apply Bounded Model Checking (BMC) on an LTL formula of |
---|
| 515 | the form F(p), where p is propositional.] |
---|
| 516 | |
---|
| 517 | Description [Given a model M, an LTL formula f = Fp, and a bound k, |
---|
| 518 | we first find a k-loop counterexample of length k at which all |
---|
| 519 | states violate p. If -r switch of the BMC command is specified, we |
---|
| 520 | apply the method in the paper "Proving More Properties with Bounded |
---|
| 521 | Model Checking" to check if the property f passes. |
---|
| 522 | |
---|
| 523 | Note: Before calling this function, the LTL formula must be negated. |
---|
| 524 | |
---|
| 525 | Using sat as SAT solver. |
---|
| 526 | |
---|
| 527 | ] |
---|
| 528 | SideEffects [] |
---|
| 529 | |
---|
| 530 | SeeAlso [] |
---|
| 531 | |
---|
| 532 | ******************************************************************************/ |
---|
| 533 | |
---|
| 534 | void |
---|
| 535 | BmcCirCUsLtlVerifyFp( |
---|
| 536 | Ntk_Network_t *network, |
---|
| 537 | Ctlsp_Formula_t *ltl, |
---|
| 538 | st_table *coiTable, |
---|
| 539 | BmcOption_t *options) |
---|
| 540 | { |
---|
| 541 | mAig_Manager_t *manager = Ntk_NetworkReadMAigManager(network); |
---|
| 542 | st_table *nodeToMvfAigTable = NIL(st_table); |
---|
| 543 | long startTime, endTime; |
---|
| 544 | bAigEdge_t property, pathProperty, simplePath, tloop, loop; |
---|
| 545 | int bound, k, satFlag; |
---|
| 546 | array_t *loop_array = NIL(array_t); |
---|
| 547 | array_t *objArray; |
---|
| 548 | array_t *auxObjArray; |
---|
| 549 | st_table *coiIndexTable; |
---|
| 550 | satInterface_t *ceInterface; |
---|
| 551 | satInterface_t *tInterface; |
---|
| 552 | Bmc_PropertyStatus formulaStatus; |
---|
| 553 | |
---|
| 554 | startTime = util_cpu_ctime(); |
---|
| 555 | if(options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 556 | fprintf(vis_stdout,"LTL formula is of type F(p)\n"); |
---|
| 557 | } |
---|
| 558 | property = BmcCirCUsCreatebAigOfPropFormulaOriginal(network, manager, |
---|
| 559 | ltl->right); |
---|
| 560 | if (verifyIfConstant(property)){ |
---|
| 561 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 562 | fprintf(vis_stdout, "-- bmc time = %10g\n", |
---|
| 563 | (double)(util_cpu_ctime() - startTime) / 1000.0); |
---|
| 564 | } |
---|
| 565 | return; |
---|
| 566 | } |
---|
| 567 | |
---|
| 568 | nodeToMvfAigTable = |
---|
| 569 | (st_table *) Ntk_NetworkReadApplInfo(network, MVFAIG_NETWORK_APPL_KEY); |
---|
| 570 | assert(nodeToMvfAigTable != NIL(st_table)); |
---|
| 571 | |
---|
| 572 | bAig_ExpandTimeFrame(network, manager, 0, BMC_INITIAL_STATES); |
---|
| 573 | coiIndexTable = BmcCirCUsGetCoiIndexTable(network, coiTable); |
---|
| 574 | |
---|
| 575 | /* |
---|
| 576 | Hold objects |
---|
| 577 | */ |
---|
| 578 | objArray = array_alloc(bAigEdge_t, 2); |
---|
| 579 | /* |
---|
| 580 | Unused entry is set to bAig_One |
---|
| 581 | */ |
---|
| 582 | array_insert(bAigEdge_t, objArray, 1, bAig_One); |
---|
| 583 | /* |
---|
| 584 | Hold auxiliary objects (constraints on the path) |
---|
| 585 | */ |
---|
| 586 | auxObjArray = array_alloc(bAigEdge_t, 0); |
---|
| 587 | |
---|
| 588 | ceInterface = 0; |
---|
| 589 | tInterface = 0; |
---|
| 590 | formulaStatus = BmcPropertyUndecided_c; |
---|
| 591 | if(options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 592 | fprintf(vis_stdout,"Apply BMC on counterexample of length >= %d and <= %d (+%d)\n", |
---|
| 593 | options->minK, options->maxK, options->step); |
---|
| 594 | |
---|
| 595 | } |
---|
| 596 | bound = options->minK; |
---|
| 597 | while(bound<=options->maxK) { |
---|
| 598 | if(options->verbosityLevel == BmcVerbosityMax_c) |
---|
| 599 | fprintf(vis_stdout, "\nBMC: Generate counterexample of length %d\n", bound); |
---|
| 600 | /* |
---|
| 601 | Expand counterexample length to bound. In BMC, counterexample of length bound means |
---|
| 602 | bound+1 time frames. |
---|
| 603 | */ |
---|
| 604 | bAig_ExpandTimeFrame(network, manager, bound+1, BMC_INITIAL_STATES ); |
---|
| 605 | /** |
---|
| 606 | * How can we manage cone of influence with this part ? |
---|
| 607 | **/ |
---|
| 608 | loop_array = array_alloc(bAigEdge_t *, 0); |
---|
| 609 | tloop = bAig_Zero; |
---|
| 610 | /* |
---|
| 611 | Loop from state 'bound' to any previous states. |
---|
| 612 | */ |
---|
| 613 | for(k=0; k<=bound; k++) { |
---|
| 614 | loop = BmcCirCUsConnectFromStateToState(network, bound, k, nodeToMvfAigTable, |
---|
| 615 | coiIndexTable, BMC_INITIAL_STATES); |
---|
| 616 | array_insert(bAigEdge_t, loop_array, k, loop); |
---|
| 617 | tloop = bAig_Or(manager, tloop, loop); |
---|
| 618 | } |
---|
| 619 | array_insert(bAigEdge_t, objArray, 0, tloop); |
---|
| 620 | /* |
---|
| 621 | tloop equals true for k-loop path |
---|
| 622 | */ |
---|
| 623 | /* |
---|
| 624 | Property false at all states |
---|
| 625 | */ |
---|
| 626 | pathProperty = bAig_One; |
---|
| 627 | for(k=bound; k>=0; k--) { |
---|
| 628 | property = BmcCirCUsCreatebAigOfPropFormula(network, manager, k, ltl->right, BMC_INITIAL_STATES); |
---|
| 629 | pathProperty = bAig_And(manager, pathProperty, property); |
---|
| 630 | } |
---|
| 631 | array_insert(bAigEdge_t, objArray, 1, pathProperty); |
---|
| 632 | |
---|
| 633 | options->cnfPrefix = bound; |
---|
| 634 | ceInterface = BmcCirCUsInterfaceWithObjArr(manager, network, |
---|
| 635 | objArray, auxObjArray, |
---|
| 636 | options, ceInterface); |
---|
| 637 | satFlag = ceInterface->status; |
---|
| 638 | if(satFlag == SAT_SAT){ |
---|
| 639 | formulaStatus = BmcPropertyFailed_c; |
---|
| 640 | break; |
---|
| 641 | } |
---|
| 642 | |
---|
| 643 | array_insert_last(bAigEdge_t, auxObjArray, bAig_Not(tloop)); |
---|
| 644 | |
---|
| 645 | if((options->inductiveStep !=0) && |
---|
| 646 | (bound % options->inductiveStep == 0)){ |
---|
| 647 | |
---|
| 648 | if (options->verbosityLevel == BmcVerbosityMax_c) { |
---|
| 649 | (void) fprintf(vis_stdout, |
---|
| 650 | "\nBMC: Check for termination\n"); |
---|
| 651 | } |
---|
| 652 | simplePath = BmcCirCUsSimlePathConstraint(network, 0, bound, nodeToMvfAigTable, |
---|
| 653 | coiIndexTable, |
---|
| 654 | BMC_INITIAL_STATES); |
---|
| 655 | array_insert(bAigEdge_t, objArray, 0, simplePath); |
---|
| 656 | array_insert(bAigEdge_t, objArray, 1, pathProperty); |
---|
| 657 | tInterface = BmcCirCUsInterfaceWithObjArr(manager, network, |
---|
| 658 | objArray, auxObjArray, |
---|
| 659 | options, tInterface); |
---|
| 660 | if(tInterface->status == SAT_UNSAT){ |
---|
| 661 | formulaStatus = BmcPropertyPassed_c; |
---|
| 662 | break; |
---|
| 663 | } |
---|
| 664 | } |
---|
| 665 | bound += options->step; |
---|
| 666 | } |
---|
| 667 | array_free(objArray); |
---|
| 668 | array_free(auxObjArray); |
---|
| 669 | st_free_table(coiIndexTable); |
---|
| 670 | sat_FreeInterface(ceInterface); |
---|
| 671 | sat_FreeInterface(tInterface); |
---|
| 672 | |
---|
| 673 | if(formulaStatus == BmcPropertyUndecided_c){ |
---|
| 674 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 675 | (void) fprintf(vis_stdout, |
---|
| 676 | "# BMC: no counterexample found of length up to %d\n", |
---|
| 677 | options->maxK); |
---|
| 678 | } |
---|
| 679 | } |
---|
| 680 | if(formulaStatus == BmcPropertyFailed_c) { |
---|
| 681 | (void) fprintf(vis_stdout, "# BMC: formula failed\n"); |
---|
| 682 | if(options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 683 | (void) fprintf(vis_stdout, |
---|
| 684 | "# BMC: Found a counterexample of length = %d \n", bound); |
---|
| 685 | } |
---|
| 686 | if(options->dbgLevel == 1){ |
---|
| 687 | BmcCirCUsPrintCounterExample(network, nodeToMvfAigTable, coiTable, bound, loop_array, |
---|
| 688 | options, BMC_INITIAL_STATES); |
---|
| 689 | } |
---|
| 690 | if(options->dbgLevel == 2){ |
---|
| 691 | BmcCirCUsPrintCounterExampleAiger(network, nodeToMvfAigTable, coiTable, bound, loop_array, |
---|
| 692 | options, BMC_INITIAL_STATES); |
---|
| 693 | } |
---|
| 694 | |
---|
| 695 | } else if(formulaStatus == BmcPropertyPassed_c) { |
---|
| 696 | (void) fprintf(vis_stdout, "# BMC: formula Passed\n"); |
---|
| 697 | (void) fprintf(vis_stdout, "# Termination depth = %d\n", bound); |
---|
| 698 | } else if(formulaStatus == BmcPropertyUndecided_c) { |
---|
| 699 | (void) fprintf(vis_stdout,"# BMC: formula undecided\n"); |
---|
| 700 | } |
---|
| 701 | if (options->verbosityLevel != BmcVerbosityNone_c) { |
---|
| 702 | endTime = util_cpu_ctime(); |
---|
| 703 | fprintf(vis_stdout, "-- bmc time = %10g\n", (double)(endTime - startTime) / 1000.0); |
---|
| 704 | } |
---|
| 705 | fflush(vis_stdout); |
---|
| 706 | array_free(loop_array); |
---|
| 707 | |
---|
| 708 | } /* BmcCirCUsLtlVerifyFp() */ |
---|
| 709 | |
---|
| 710 | /**Function******************************************************************** |
---|
| 711 | |
---|
| 712 | Synopsis [Build AIG graph of BMC encoding for a path] |
---|
| 713 | |
---|
| 714 | Description [Build AIG graph of BMC encoding for a path. If loop = -1, |
---|
| 715 | then the BMC encoding is for no loop path. Otherwise, it is for |
---|
| 716 | (to, loop)-loop path] |
---|
| 717 | |
---|
| 718 | SideEffects [] |
---|
| 719 | |
---|
| 720 | SeeAlso [] |
---|
| 721 | |
---|
| 722 | ******************************************************************************/ |
---|
| 723 | bAigEdge_t |
---|
| 724 | BmcCirCUsGenerateLogicForLtl( |
---|
| 725 | Ntk_Network_t *network, |
---|
| 726 | Ctlsp_Formula_t *ltl, |
---|
| 727 | int from, |
---|
| 728 | int to, |
---|
| 729 | int loop) |
---|
| 730 | { |
---|
| 731 | bAigEdge_t property, temp; |
---|
| 732 | bAigEdge_t left, right, result; |
---|
| 733 | int j, k; |
---|
| 734 | mAig_Manager_t *manager = Ntk_NetworkReadMAigManager(network); |
---|
| 735 | |
---|
| 736 | if(Ctlsp_isPropositionalFormula(ltl)){ |
---|
| 737 | property = BmcCirCUsCreatebAigOfPropFormula(network, manager, from, ltl, BMC_INITIAL_STATES); |
---|
| 738 | return(property); |
---|
| 739 | } |
---|
| 740 | |
---|
| 741 | switch(ltl->type) { |
---|
| 742 | case Ctlsp_NOT_c: |
---|
| 743 | if (!Ctlsp_isPropositionalFormula(ltl->left)){ |
---|
| 744 | fprintf(vis_stderr,"BMC error: the LTL formula is not in NNF\n"); |
---|
| 745 | return 0; |
---|
| 746 | } |
---|
| 747 | case Ctlsp_AND_c: |
---|
| 748 | left = BmcCirCUsGenerateLogicForLtl(network, ltl->left, from, to, loop); |
---|
| 749 | if(left == bAig_Zero) return(bAig_Zero); |
---|
| 750 | right = BmcCirCUsGenerateLogicForLtl(network, ltl->right, from, to, loop); |
---|
| 751 | return(bAig_And(manager, left, right)); |
---|
| 752 | case Ctlsp_OR_c: |
---|
| 753 | left = BmcCirCUsGenerateLogicForLtl(network, ltl->left, from, to, loop); |
---|
| 754 | if(left == bAig_One) return(bAig_One); |
---|
| 755 | right = BmcCirCUsGenerateLogicForLtl(network, ltl->right, from, to, loop); |
---|
| 756 | return(bAig_Or(manager, left, right)); |
---|
| 757 | case Ctlsp_F_c: |
---|
| 758 | if(loop >= 0) from = (loop<from) ? loop : from; |
---|
| 759 | result = bAig_Zero; |
---|
| 760 | for(j=from; j<=to; j++) { |
---|
| 761 | left = BmcCirCUsGenerateLogicForLtl(network, ltl->left, j, to, loop); |
---|
| 762 | if(left == bAig_One) return(left); |
---|
| 763 | result = bAig_Or(manager, left, result); |
---|
| 764 | } |
---|
| 765 | return(result); |
---|
| 766 | case Ctlsp_G_c: |
---|
| 767 | if(loop < 0) return(bAig_Zero); |
---|
| 768 | from = (loop < from) ? loop : from; |
---|
| 769 | result = bAig_One; |
---|
| 770 | for(j=from; j<=to; j++) { |
---|
| 771 | left = BmcCirCUsGenerateLogicForLtl(network, ltl->left, j, to, loop); |
---|
| 772 | result = bAig_And(manager, result, left); |
---|
| 773 | if(result == bAig_Zero) break; |
---|
| 774 | } |
---|
| 775 | return(result); |
---|
| 776 | case Ctlsp_X_c: |
---|
| 777 | if(loop>=0 && from == to) from = loop; |
---|
| 778 | else if(from < to) from = from + 1; |
---|
| 779 | else return(bAig_Zero); |
---|
| 780 | left = BmcCirCUsGenerateLogicForLtl(network, ltl->left, from, to, loop); |
---|
| 781 | return(left); |
---|
| 782 | case Ctlsp_U_c: |
---|
| 783 | result = bAig_Zero; |
---|
| 784 | for(j=from; j<=to; j++) { |
---|
| 785 | right = BmcCirCUsGenerateLogicForLtl(network, ltl->right, j, to, loop); |
---|
| 786 | temp = right; |
---|
| 787 | for(k=from; (k<=j-1); k++) { |
---|
| 788 | left = BmcCirCUsGenerateLogicForLtl(network, ltl->left, k, to, loop); |
---|
| 789 | temp = bAig_And(manager, temp, left); |
---|
| 790 | if(temp == bAig_Zero) break; |
---|
| 791 | } |
---|
| 792 | result = bAig_Or(manager, result, temp); |
---|
| 793 | if(result == bAig_One) break; |
---|
| 794 | } |
---|
| 795 | if(loop>=0 && result != bAig_One) { |
---|
| 796 | for(j=loop; j<=from-1; j++) { |
---|
| 797 | right = BmcCirCUsGenerateLogicForLtl(network, ltl->right, j, to, loop); |
---|
| 798 | temp = right; |
---|
| 799 | for(k=from; k<=to; k++) { |
---|
| 800 | left = BmcCirCUsGenerateLogicForLtl(network, ltl->left, k, to, loop); |
---|
| 801 | temp = bAig_And(manager, temp, left); |
---|
| 802 | if(temp == bAig_Zero) break; |
---|
| 803 | } |
---|
| 804 | for(k=loop; k<=j-1; k++) { |
---|
| 805 | left = BmcCirCUsGenerateLogicForLtl(network, ltl->left, k, to, loop); |
---|
| 806 | temp = bAig_And(manager, temp, left); |
---|
| 807 | if(temp == bAig_Zero) break; |
---|
| 808 | } |
---|
| 809 | result = bAig_Or(manager, result, temp); |
---|
| 810 | if(result == bAig_One) break; |
---|
| 811 | } |
---|
| 812 | } |
---|
| 813 | return(result); |
---|
| 814 | case Ctlsp_R_c: |
---|
| 815 | result = bAig_Zero; |
---|
| 816 | if(loop >= 0) { |
---|
| 817 | temp = bAig_One; |
---|
| 818 | for(j=(from<loop ? from : loop); j<=to; j++) { |
---|
| 819 | right = BmcCirCUsGenerateLogicForLtl(network, ltl->right, j, to, loop); |
---|
| 820 | temp = bAig_And(manager, temp, right); |
---|
| 821 | if(temp == bAig_Zero) break; |
---|
| 822 | } |
---|
| 823 | result = bAig_Or(manager, result, temp); |
---|
| 824 | } |
---|
| 825 | if(result != bAig_One) { |
---|
| 826 | for(j=from; j<=to; j++) { |
---|
| 827 | left = BmcCirCUsGenerateLogicForLtl(network, ltl->left, j, to, loop); |
---|
| 828 | temp = left; |
---|
| 829 | for(k=from; k<=j; k++) { |
---|
| 830 | right = BmcCirCUsGenerateLogicForLtl(network, ltl->right, k, to, loop); |
---|
| 831 | temp = bAig_And(manager, temp, right); |
---|
| 832 | if(temp == bAig_Zero) break; |
---|
| 833 | } |
---|
| 834 | result = bAig_Or(manager, temp, result); |
---|
| 835 | if(result == bAig_One) break; |
---|
| 836 | } |
---|
| 837 | if(loop >= 0 && result != bAig_One) { |
---|
| 838 | for(j=loop; j<=from-1; j++) { |
---|
| 839 | left = BmcCirCUsGenerateLogicForLtl(network, ltl->left, j, to, loop); |
---|
| 840 | |
---|
| 841 | temp = left; |
---|
| 842 | for(k=from; k<=to; k++) { |
---|
| 843 | right = BmcCirCUsGenerateLogicForLtl(network, ltl->right, k, to, loop); |
---|
| 844 | temp = bAig_And(manager, temp, right); |
---|
| 845 | if(temp == bAig_Zero) break; |
---|
| 846 | } |
---|
| 847 | |
---|
| 848 | for(k=loop; k<=j; k++) { |
---|
| 849 | right = BmcCirCUsGenerateLogicForLtl(network, ltl->right, k, to, loop); |
---|
| 850 | temp = bAig_And(manager, temp, right); |
---|
| 851 | if(temp == bAig_Zero) break; |
---|
| 852 | } |
---|
| 853 | |
---|
| 854 | result = bAig_Or(manager, result, temp); |
---|
| 855 | if(result == bAig_One) break; |
---|
| 856 | } |
---|
| 857 | } |
---|
| 858 | } |
---|
| 859 | return(result); |
---|
| 860 | default: |
---|
| 861 | fail("Unexpected LTL formula type"); |
---|
| 862 | break; |
---|
| 863 | } |
---|
| 864 | assert(0); |
---|
| 865 | return(-1); |
---|
| 866 | |
---|
| 867 | } |
---|
| 868 | |
---|
| 869 | /**Function******************************************************************** |
---|
| 870 | |
---|
| 871 | Synopsis [Build AIG graph for BMC encoding using Separated Normal Form |
---|
| 872 | (SNF)] |
---|
| 873 | |
---|
| 874 | Description [] |
---|
| 875 | |
---|
| 876 | SideEffects [] |
---|
| 877 | |
---|
| 878 | SeeAlso [] |
---|
| 879 | |
---|
| 880 | ******************************************************************************/ |
---|
| 881 | bAigEdge_t |
---|
| 882 | BmcCirCUsGenerateLogicForLtlSNF( |
---|
| 883 | Ntk_Network_t *network, |
---|
| 884 | array_t *formulaArray, |
---|
| 885 | int fromState, |
---|
| 886 | int toState, |
---|
| 887 | int loop) |
---|
| 888 | { |
---|
| 889 | mAig_Manager_t *manager = Ntk_NetworkReadMAigManager(network); |
---|
| 890 | Ctlsp_Formula_t *formula; |
---|
| 891 | bAigEdge_t property = bAig_One; |
---|
| 892 | bAigEdge_t left, right, result; |
---|
| 893 | int i, k; |
---|
| 894 | Ctlsp_Formula_t *leftChild, *rightChild; |
---|
| 895 | |
---|
| 896 | for (i = 0; i < array_n(formulaArray); i++) { |
---|
| 897 | formula = array_fetch(Ctlsp_Formula_t *, formulaArray, i); |
---|
| 898 | leftChild = Ctlsp_FormulaReadLeftChild(formula); |
---|
| 899 | rightChild = Ctlsp_FormulaReadRightChild(formula); |
---|
| 900 | |
---|
| 901 | if(!strcmp(Ctlsp_FormulaReadVariableName(leftChild), " SNFstart")){ |
---|
| 902 | result = BmcCirCUsGenerateLogicForLtl(network, rightChild, |
---|
| 903 | 0, toState, loop); |
---|
| 904 | } else |
---|
| 905 | if(!strcmp(Ctlsp_FormulaReadVariableName(leftChild), " SNFbound")){ |
---|
| 906 | result = BmcCirCUsGenerateLogicForLtl(network, rightChild, |
---|
| 907 | toState, toState, loop); |
---|
| 908 | } else { |
---|
| 909 | result = bAig_One; |
---|
| 910 | for(k=fromState; k<= toState; k++){ |
---|
| 911 | left = BmcCirCUsGenerateLogicForLtl(network, leftChild, |
---|
| 912 | k, toState, loop); |
---|
| 913 | right = BmcCirCUsGenerateLogicForLtl(network, rightChild, |
---|
| 914 | k, toState, loop); |
---|
| 915 | result = bAig_And(manager, result, |
---|
| 916 | bAig_Then(manager, left, right)); |
---|
| 917 | } |
---|
| 918 | } |
---|
| 919 | property = bAig_And(manager, property, result); |
---|
| 920 | } |
---|
| 921 | return property; |
---|
| 922 | } /* BmcCirCUsGenerateLogicForLtlSNF */ |
---|
| 923 | |
---|
| 924 | |
---|
| 925 | /**Function******************************************************************** |
---|
| 926 | |
---|
| 927 | Synopsis [Build AIG graph of BMC encoding for LTL formulae based on fixpoint |
---|
| 928 | characteristics of LTL formulae.] |
---|
| 929 | |
---|
| 930 | Description [We use BMC encoding based on FMCAD'04 paper: Simple Bounded LTL |
---|
| 931 | Model Checking. |
---|
| 932 | |
---|
| 933 | This function can only be applied to abbreviation-free LTL formulae. The |
---|
| 934 | formula must be in Negation Normal Form. For LTL formula of the form Fp, |
---|
| 935 | where p is propositional, this function build AIG for auxiliary |
---|
| 936 | translation.] |
---|
| 937 | |
---|
| 938 | SideEffects [] |
---|
| 939 | |
---|
| 940 | SeeAlso [] |
---|
| 941 | |
---|
| 942 | ******************************************************************************/ |
---|
| 943 | bAigEdge_t |
---|
| 944 | BmcCirCUsGenerateLogicForLtlFixPoint( |
---|
| 945 | Ntk_Network_t *network, |
---|
| 946 | Ctlsp_Formula_t *ltl, |
---|
| 947 | int from, |
---|
| 948 | int to, |
---|
| 949 | array_t *loopArray) |
---|
| 950 | { |
---|
| 951 | bAigEdge_t result; |
---|
| 952 | st_table *ltl2AigTable; |
---|
| 953 | |
---|
| 954 | assert(ltl != NIL(Ctlsp_Formula_t)); |
---|
| 955 | |
---|
| 956 | ltl2AigTable = st_init_table(strcmp, st_strhash); |
---|
| 957 | result = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl, |
---|
| 958 | from, to, 0, loopArray, ltl2AigTable); |
---|
| 959 | st_free_table(ltl2AigTable); |
---|
| 960 | |
---|
| 961 | return result; |
---|
| 962 | } /* BmcCirCUsGenerateLogicForLtlFixPoint */ |
---|
| 963 | |
---|
| 964 | /**Function******************************************************************** |
---|
| 965 | |
---|
| 966 | Synopsis [The recursive function of BmcCirCUsGenerateLogicForLtlFixPoint] |
---|
| 967 | |
---|
| 968 | Description [] |
---|
| 969 | |
---|
| 970 | SideEffects [] |
---|
| 971 | |
---|
| 972 | SeeAlso [] |
---|
| 973 | |
---|
| 974 | ******************************************************************************/ |
---|
| 975 | bAigEdge_t |
---|
| 976 | BmcCirCUsGenerateLogicForLtlFixPointRecursive( |
---|
| 977 | Ntk_Network_t *network, |
---|
| 978 | Ctlsp_Formula_t *ltl, |
---|
| 979 | int from, |
---|
| 980 | int to, |
---|
| 981 | int translation, /* 0 auxilary translation. 1 final translation */ |
---|
| 982 | array_t *loopArray, |
---|
| 983 | st_table *ltl2AigTable) |
---|
| 984 | { |
---|
| 985 | mAig_Manager_t *manager = Ntk_NetworkReadMAigManager(network); |
---|
| 986 | bAigEdge_t property, temp; |
---|
| 987 | bAigEdge_t left, right, result; |
---|
| 988 | |
---|
| 989 | int j; |
---|
| 990 | |
---|
| 991 | char *nameKey; |
---|
| 992 | char tmpName[100]; |
---|
| 993 | |
---|
| 994 | /* |
---|
| 995 | Check if AIG was built for this LTL formula at a given time |
---|
| 996 | */ |
---|
| 997 | sprintf(tmpName, "%ld_%d%d", (long)ltl, from, translation); |
---|
| 998 | nameKey = util_strsav(tmpName); |
---|
| 999 | if(st_lookup(ltl2AigTable, nameKey, &result)){ |
---|
| 1000 | FREE(nameKey); |
---|
| 1001 | return result; |
---|
| 1002 | } |
---|
| 1003 | FREE(nameKey); |
---|
| 1004 | |
---|
| 1005 | if(Ctlsp_isPropositionalFormula(ltl)){ |
---|
| 1006 | property = BmcCirCUsCreatebAigOfPropFormula(network, manager, |
---|
| 1007 | from, ltl, BMC_INITIAL_STATES); |
---|
| 1008 | sprintf(tmpName, "%ld_%d%d", (long)ltl, from, 1); |
---|
| 1009 | nameKey = util_strsav(tmpName); |
---|
| 1010 | st_insert(ltl2AigTable, nameKey, (char*) (long) property); |
---|
| 1011 | return(property); |
---|
| 1012 | } |
---|
| 1013 | switch(ltl->type) { |
---|
| 1014 | case Ctlsp_NOT_c: |
---|
| 1015 | if (!Ctlsp_isPropositionalFormula(ltl->left)){ |
---|
| 1016 | fprintf(vis_stderr,"BMC error: the LTL formula is not in NNF\n"); |
---|
| 1017 | |
---|
| 1018 | return 0; |
---|
| 1019 | } |
---|
| 1020 | case Ctlsp_AND_c: |
---|
| 1021 | left = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl->left, from, to, |
---|
| 1022 | translation, loopArray, ltl2AigTable); |
---|
| 1023 | if(left == bAig_Zero){ |
---|
| 1024 | return(bAig_Zero); |
---|
| 1025 | } |
---|
| 1026 | right = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl->right, from, to, |
---|
| 1027 | translation, loopArray, ltl2AigTable); |
---|
| 1028 | return(bAig_And(manager, left, right)); |
---|
| 1029 | case Ctlsp_OR_c: |
---|
| 1030 | left = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl->left, from, to, |
---|
| 1031 | translation, loopArray, ltl2AigTable); |
---|
| 1032 | if(left == bAig_One){ |
---|
| 1033 | return(bAig_One); |
---|
| 1034 | } |
---|
| 1035 | right = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl->right, from, to, |
---|
| 1036 | translation, loopArray, ltl2AigTable); |
---|
| 1037 | return(bAig_Or(manager, left, right)); |
---|
| 1038 | case Ctlsp_X_c: |
---|
| 1039 | if(from < to){ |
---|
| 1040 | result = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl->left, from+1, to, |
---|
| 1041 | 1, loopArray, ltl2AigTable); |
---|
| 1042 | } else { |
---|
| 1043 | result = bAig_Zero; |
---|
| 1044 | for(j=1; j<=to; j++) { |
---|
| 1045 | left = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl->left, j, to, |
---|
| 1046 | 1, loopArray, ltl2AigTable); |
---|
| 1047 | temp = bAig_And(manager, array_fetch(bAigEdge_t, loopArray, j), left); |
---|
| 1048 | result = bAig_Or(manager, result, temp); |
---|
| 1049 | } |
---|
| 1050 | } |
---|
| 1051 | sprintf(tmpName, "%ld_%d%d", (long) ltl, from, 1); |
---|
| 1052 | nameKey = util_strsav(tmpName); |
---|
| 1053 | st_insert(ltl2AigTable, nameKey, (char*) (long) result); |
---|
| 1054 | return result; |
---|
| 1055 | case Ctlsp_U_c: |
---|
| 1056 | sprintf(tmpName, "%ld_%d%d", (long) ltl, to, 0); /* 0 for auxiliary translation*/ |
---|
| 1057 | nameKey = util_strsav(tmpName); |
---|
| 1058 | right = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl->right, to, to, 1, loopArray, ltl2AigTable); |
---|
| 1059 | st_insert(ltl2AigTable, nameKey, (char*) (long) right); |
---|
| 1060 | /* |
---|
| 1061 | Compute the auxiliary translation. |
---|
| 1062 | */ |
---|
| 1063 | for(j=to-1; j>=from; j--) { |
---|
| 1064 | result = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl, j+1, to, 0, loopArray, ltl2AigTable); |
---|
| 1065 | |
---|
| 1066 | right = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl->right, j, to, 1, loopArray, ltl2AigTable); |
---|
| 1067 | left = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl->left, j, to, 1, loopArray, ltl2AigTable); |
---|
| 1068 | |
---|
| 1069 | result = bAig_And(manager,left, result); |
---|
| 1070 | result = bAig_Or(manager,right, result); |
---|
| 1071 | |
---|
| 1072 | sprintf(tmpName, "%ld_%d%d", (long)ltl, j, 0); /* 0 for auxiliary translation*/ |
---|
| 1073 | nameKey = util_strsav(tmpName); |
---|
| 1074 | st_insert(ltl2AigTable, nameKey, (char*) (long) result); |
---|
| 1075 | } |
---|
| 1076 | /* |
---|
| 1077 | Compute the final translation at k. |
---|
| 1078 | */ |
---|
| 1079 | result = bAig_Zero; |
---|
| 1080 | for(j=1; j<=to; j++) { |
---|
| 1081 | temp = bAig_And(manager, array_fetch(bAigEdge_t, loopArray, j), |
---|
| 1082 | BmcCirCUsGenerateLogicForLtlFixPointRecursive( |
---|
| 1083 | network, ltl, j, to, 0, loopArray, ltl2AigTable)); |
---|
| 1084 | result = bAig_Or(manager, result, temp); |
---|
| 1085 | } |
---|
| 1086 | right = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl->right, to, to, 1, loopArray, ltl2AigTable); |
---|
| 1087 | left = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl->left, |
---|
| 1088 | to, to, 1, loopArray, |
---|
| 1089 | ltl2AigTable); |
---|
| 1090 | |
---|
| 1091 | result = bAig_And(manager,left, result); |
---|
| 1092 | result = bAig_Or(manager,right, result); |
---|
| 1093 | |
---|
| 1094 | sprintf(tmpName, "%ld_%d%d", (long)ltl, to, 1); /* 1 for final translation*/ |
---|
| 1095 | nameKey = util_strsav(tmpName); |
---|
| 1096 | st_insert(ltl2AigTable, nameKey, (char*) (long) result); |
---|
| 1097 | /* |
---|
| 1098 | Compute the final translation. |
---|
| 1099 | */ |
---|
| 1100 | for(j=to-1; j>=from; j--) { |
---|
| 1101 | result = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl, j+1, to, 1, loopArray, ltl2AigTable); |
---|
| 1102 | |
---|
| 1103 | right = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl->right, j, to, 1, loopArray, ltl2AigTable); |
---|
| 1104 | left = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl->left, j, to, 1, loopArray, ltl2AigTable); |
---|
| 1105 | |
---|
| 1106 | result = bAig_And(manager,left, result); |
---|
| 1107 | result = bAig_Or(manager,right, result); |
---|
| 1108 | |
---|
| 1109 | sprintf(tmpName, "%ld_%d%d", (long)ltl, j, 1); |
---|
| 1110 | nameKey = util_strsav(tmpName); |
---|
| 1111 | st_insert(ltl2AigTable, nameKey, (char*) (long) result); |
---|
| 1112 | } |
---|
| 1113 | return(result); |
---|
| 1114 | case Ctlsp_R_c: |
---|
| 1115 | sprintf(tmpName, "%ld_%d%d", (long)ltl, to, 0); /* 0 for auxiliary translation*/ |
---|
| 1116 | right = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl->right, to, to, 1, loopArray, ltl2AigTable); |
---|
| 1117 | nameKey = util_strsav(tmpName); |
---|
| 1118 | st_insert(ltl2AigTable, nameKey, (char*) (long) right); |
---|
| 1119 | /* |
---|
| 1120 | Compute the auxiliary translation. |
---|
| 1121 | */ |
---|
| 1122 | for(j=to-1; j>=from; j--) { |
---|
| 1123 | result = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl, j+1, to, 0, loopArray, ltl2AigTable); |
---|
| 1124 | |
---|
| 1125 | right = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl->right, j, to, 1, loopArray, ltl2AigTable); |
---|
| 1126 | left = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl->left, j, to, 1, loopArray, ltl2AigTable); |
---|
| 1127 | |
---|
| 1128 | result = bAig_Or(manager,left, result); |
---|
| 1129 | result = bAig_And(manager,right, result); |
---|
| 1130 | |
---|
| 1131 | sprintf(tmpName, "%ld_%d%d", (long) ltl, j, 0); /* 0 for auxiliary translation*/ |
---|
| 1132 | nameKey = util_strsav(tmpName); |
---|
| 1133 | st_insert(ltl2AigTable, nameKey, (char*) (long) result); |
---|
| 1134 | } |
---|
| 1135 | /* |
---|
| 1136 | Compute the final translation at k. |
---|
| 1137 | */ |
---|
| 1138 | result = bAig_Zero; |
---|
| 1139 | for(j=1; j<=to; j++) { |
---|
| 1140 | temp = bAig_And(manager, array_fetch(bAigEdge_t, loopArray, j), |
---|
| 1141 | BmcCirCUsGenerateLogicForLtlFixPointRecursive( |
---|
| 1142 | network, ltl, j, to, 0, loopArray, ltl2AigTable)); |
---|
| 1143 | result = bAig_Or(manager, result, temp); |
---|
| 1144 | } |
---|
| 1145 | right = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl->right, |
---|
| 1146 | to, to, 1, loopArray, |
---|
| 1147 | ltl2AigTable); |
---|
| 1148 | left = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl->left, |
---|
| 1149 | to, to, 1, loopArray, |
---|
| 1150 | ltl2AigTable); |
---|
| 1151 | result = bAig_Or(manager,left, result); |
---|
| 1152 | result = bAig_And(manager,right, result); |
---|
| 1153 | |
---|
| 1154 | sprintf(tmpName, "%ld_%d%d", (long) ltl, to+1, 1); /* 1 for final translation*/ |
---|
| 1155 | nameKey = util_strsav(tmpName); |
---|
| 1156 | st_insert(ltl2AigTable, nameKey, (char*) (long) result); |
---|
| 1157 | /* |
---|
| 1158 | Compute the final translation. |
---|
| 1159 | */ |
---|
| 1160 | for(j=to-1; j>=from; j--) { |
---|
| 1161 | result = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl, j+1, to, 1, loopArray, ltl2AigTable); |
---|
| 1162 | |
---|
| 1163 | right = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl->right, j, to, 1, loopArray, ltl2AigTable); |
---|
| 1164 | left = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl->left, j, to, 1, loopArray, ltl2AigTable); |
---|
| 1165 | |
---|
| 1166 | result = bAig_Or(manager,left, result); |
---|
| 1167 | result = bAig_And(manager,right, result); |
---|
| 1168 | |
---|
| 1169 | sprintf(tmpName, "%ld_%d%d", (long)ltl, j, 1); |
---|
| 1170 | nameKey = util_strsav(tmpName); |
---|
| 1171 | st_insert(ltl2AigTable, nameKey, (char*) (long) result); |
---|
| 1172 | } |
---|
| 1173 | return(result); |
---|
| 1174 | case Ctlsp_F_c: |
---|
| 1175 | /* |
---|
| 1176 | Compute only the auxiliary translation. |
---|
| 1177 | */ |
---|
| 1178 | sprintf(tmpName, "%ld_%d%d", (long)ltl, to, 0); /* 0 for auxiliary translation*/ |
---|
| 1179 | nameKey = util_strsav(tmpName); |
---|
| 1180 | left = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl->left, |
---|
| 1181 | to, to, 1, loopArray, |
---|
| 1182 | ltl2AigTable); |
---|
| 1183 | st_insert(ltl2AigTable, nameKey, (char*) (long) left); |
---|
| 1184 | |
---|
| 1185 | for(j=to-1; j>=from; j--) { |
---|
| 1186 | result = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl, |
---|
| 1187 | j+1, to, 0, |
---|
| 1188 | loopArray, |
---|
| 1189 | ltl2AigTable); |
---|
| 1190 | left = BmcCirCUsGenerateLogicForLtlFixPointRecursive(network, ltl->left, |
---|
| 1191 | j, to, 1, loopArray, |
---|
| 1192 | ltl2AigTable); |
---|
| 1193 | result = bAig_Or(manager,left, result); |
---|
| 1194 | |
---|
| 1195 | sprintf(tmpName, "%ld_%d%d", (long)ltl, j, 0); /* 0 for auxiliary translation*/ |
---|
| 1196 | nameKey = util_strsav(tmpName); |
---|
| 1197 | st_insert(ltl2AigTable, nameKey, (char*) (long) result); |
---|
| 1198 | } |
---|
| 1199 | result = bAig_Zero; |
---|
| 1200 | for(j=1; j<=to; j++) { |
---|
| 1201 | temp = bAig_And(manager, array_fetch(bAigEdge_t, loopArray, j), |
---|
| 1202 | BmcCirCUsGenerateLogicForLtlFixPointRecursive( |
---|
| 1203 | network, ltl, j, to, 0, loopArray, ltl2AigTable)); |
---|
| 1204 | result = bAig_Or(manager, result, temp); |
---|
| 1205 | } |
---|
| 1206 | return(result); |
---|
| 1207 | default: |
---|
| 1208 | fail("Unexpected LTL formula type"); |
---|
| 1209 | break; |
---|
| 1210 | } |
---|
| 1211 | assert(0); |
---|
| 1212 | return(-1); |
---|
| 1213 | } |
---|
| 1214 | |
---|
| 1215 | /**Function******************************************************************** |
---|
| 1216 | |
---|
| 1217 | Synopsis [Apply Bounded Model Checking (BMC) on an LTL formula of |
---|
| 1218 | the form FG(p), where p is propositional.] |
---|
| 1219 | |
---|
| 1220 | Description [Given a model M, an LTL formula f = FGp, and a bound k, we |
---|
| 1221 | first find a k-loop counterexample of length k at which p false inside the |
---|
| 1222 | loop. If -r switch of the BMC command is specified, we apply the method in |
---|
| 1223 | the paper "Proving More Properties with Bounded Model Checking" to check if |
---|
| 1224 | the property passes. |
---|
| 1225 | |
---|
| 1226 | Note: Before calling this function, the LTL formula must be negated. |
---|
| 1227 | |
---|
| 1228 | ] |
---|
| 1229 | |
---|
| 1230 | SideEffects [] |
---|
| 1231 | |
---|
| 1232 | SeeAlso [] |
---|
| 1233 | |
---|
| 1234 | ******************************************************************************/ |
---|
| 1235 | void |
---|
| 1236 | BmcCirCUsLtlVerifyFGp( |
---|
| 1237 | Ntk_Network_t *network, |
---|
| 1238 | Ctlsp_Formula_t *ltlFormula, |
---|
| 1239 | st_table *coiTable, |
---|
| 1240 | BmcOption_t *options) |
---|
| 1241 | { |
---|
| 1242 | mAig_Manager_t *manager = Ntk_NetworkReadMAigManager(network); |
---|
| 1243 | st_table *nodeToMvfAigTable = NIL(st_table); /* node to mvfAig */ |
---|
| 1244 | |
---|
| 1245 | int j, k, l, satFlag; |
---|
| 1246 | |
---|
| 1247 | long startTime, endTime; |
---|
| 1248 | int minK = options->minK; |
---|
| 1249 | int maxK = options->maxK; |
---|
| 1250 | Ctlsp_Formula_t *propFormula; |
---|
| 1251 | bAigEdge_t property, loop, pathProperty, tloop; |
---|
| 1252 | array_t *loop_array = NIL(array_t); |
---|
| 1253 | array_t *previousResultArray; |
---|
| 1254 | st_table *coiIndexTable; |
---|
| 1255 | satInterface_t *ceInterface; |
---|
| 1256 | |
---|
| 1257 | Bmc_PropertyStatus formulaStatus; |
---|
| 1258 | |
---|
| 1259 | int m=-1, n=-1; |
---|
| 1260 | int checkLevel = 0; |
---|
| 1261 | /* |
---|
| 1262 | Refer to Theorem 1 in the paper "Proving More Properties with Bounded Model Checking" |
---|
| 1263 | |
---|
| 1264 | If checkLevel == 0 --> check for beta' only. If UNSAT, m=k and chekLevel = 1 |
---|
| 1265 | If checkLevel == 1 --> check for beta only. If UNSAT, checkLevel = 2. |
---|
| 1266 | If checkLevel == 2 --> check for alpha only. If UNSAT, n=k and checkLevel = 3. |
---|
| 1267 | If gama is UNSAT up to (m+n-1) and checkLvel = 3, formula passes. |
---|
| 1268 | checkLevel = 4 if (m+n-1) > maxK; */ |
---|
| 1269 | |
---|
| 1270 | /* |
---|
| 1271 | Remember the LTL property was negated |
---|
| 1272 | */ |
---|
| 1273 | assert(Ctlsp_LtlFormulaIsGFp(ltlFormula)); |
---|
| 1274 | |
---|
| 1275 | /* ************** */ |
---|
| 1276 | /* Initialization */ |
---|
| 1277 | /* ************** */ |
---|
| 1278 | |
---|
| 1279 | startTime = util_cpu_ctime(); |
---|
| 1280 | if(options->verbosityLevel >= BmcVerbosityMax_c){ |
---|
| 1281 | fprintf(vis_stdout,"LTL formula is of type FG(p)\n"); |
---|
| 1282 | } |
---|
| 1283 | propFormula = Ctlsp_FormulaReadRightChild(Ctlsp_FormulaReadRightChild(ltlFormula)); |
---|
| 1284 | property = BmcCirCUsCreatebAigOfPropFormulaOriginal(network, manager, |
---|
| 1285 | propFormula); |
---|
| 1286 | if (verifyIfConstant(property)){ |
---|
| 1287 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 1288 | fprintf(vis_stdout, "-- bmc time = %10g\n", |
---|
| 1289 | (double)(util_cpu_ctime() - startTime) / 1000.0); |
---|
| 1290 | } |
---|
| 1291 | return; |
---|
| 1292 | } |
---|
| 1293 | |
---|
| 1294 | /* |
---|
| 1295 | nodeToMvfAigTable maps each node to its multi-function And/Inv graph |
---|
| 1296 | */ |
---|
| 1297 | nodeToMvfAigTable = |
---|
| 1298 | (st_table *) Ntk_NetworkReadApplInfo(network, MVFAIG_NETWORK_APPL_KEY); |
---|
| 1299 | assert(nodeToMvfAigTable != NIL(st_table)); |
---|
| 1300 | |
---|
| 1301 | bAig_ExpandTimeFrame(network, manager, 0, BMC_INITIAL_STATES); |
---|
| 1302 | coiIndexTable = BmcCirCUsGetCoiIndexTable(network, coiTable); |
---|
| 1303 | |
---|
| 1304 | previousResultArray = array_alloc(bAigEdge_t, 0); |
---|
| 1305 | ceInterface = 0; |
---|
| 1306 | if(options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 1307 | fprintf(vis_stdout,"Apply BMC on counterexample of length >= %d and <= %d (+%d)\n", |
---|
| 1308 | options->minK, options->maxK, options->step); |
---|
| 1309 | |
---|
| 1310 | } |
---|
| 1311 | k= minK; |
---|
| 1312 | formulaStatus = BmcPropertyUndecided_c; |
---|
| 1313 | while(k <= maxK){ |
---|
| 1314 | if (options->verbosityLevel >= BmcVerbosityMax_c) { |
---|
| 1315 | (void) fprintf(vis_stdout, "\nGenerate counterexample of length %d\n", k); |
---|
| 1316 | } |
---|
| 1317 | /* |
---|
| 1318 | Expand counterexample length to bound. In BMC, counterexample of length bound means |
---|
| 1319 | k+1 time frames. |
---|
| 1320 | */ |
---|
| 1321 | bAig_ExpandTimeFrame(network, manager, k+1, BMC_INITIAL_STATES ); |
---|
| 1322 | |
---|
| 1323 | /* |
---|
| 1324 | k-loop |
---|
| 1325 | */ |
---|
| 1326 | loop_array = array_alloc(bAigEdge_t *, 0); |
---|
| 1327 | tloop = bAig_Zero; |
---|
| 1328 | /* |
---|
| 1329 | Loop from last state to any previous states. |
---|
| 1330 | */ |
---|
| 1331 | for(l=0; l<=k; l++) { |
---|
| 1332 | loop = BmcCirCUsConnectFromStateToState(network, k, l, nodeToMvfAigTable, |
---|
| 1333 | coiIndexTable, BMC_INITIAL_STATES); |
---|
| 1334 | array_insert(bAigEdge_t, loop_array, l, loop); |
---|
| 1335 | pathProperty = bAig_Zero; |
---|
| 1336 | for(j=l; j<=k; j++){ |
---|
| 1337 | property = BmcCirCUsCreatebAigOfPropFormula(network, manager, j, propFormula, BMC_INITIAL_STATES); |
---|
| 1338 | pathProperty = bAig_Or(manager, pathProperty, property); |
---|
| 1339 | } |
---|
| 1340 | |
---|
| 1341 | tloop = bAig_Or(manager, tloop, bAig_And(manager, pathProperty, loop)); |
---|
| 1342 | } |
---|
| 1343 | options->cnfPrefix = k; |
---|
| 1344 | ceInterface = BmcCirCUsInterface(manager, network, tloop, |
---|
| 1345 | previousResultArray, options, |
---|
| 1346 | ceInterface); |
---|
| 1347 | satFlag = ceInterface->status; |
---|
| 1348 | if(satFlag == SAT_SAT){ |
---|
| 1349 | formulaStatus = BmcPropertyFailed_c; |
---|
| 1350 | break; |
---|
| 1351 | } |
---|
| 1352 | array_free(loop_array); |
---|
| 1353 | |
---|
| 1354 | /* ================== |
---|
| 1355 | Prove termination |
---|
| 1356 | ================== */ |
---|
| 1357 | if((checkLevel < 3) && |
---|
| 1358 | (options->inductiveStep !=0) && |
---|
| 1359 | (k % options->inductiveStep == 0)) |
---|
| 1360 | { |
---|
| 1361 | satInterface_t *tInterface=0, *etInterface=0; |
---|
| 1362 | bAigEdge_t simplePath, property; |
---|
| 1363 | int i; |
---|
| 1364 | |
---|
| 1365 | /* =========================== |
---|
| 1366 | Early termination condition |
---|
| 1367 | =========================== |
---|
| 1368 | */ |
---|
| 1369 | if (options->earlyTermination) { |
---|
| 1370 | if (options->verbosityLevel >= BmcVerbosityMax_c) { |
---|
| 1371 | (void) fprintf(vis_stdout, "\nChecking for early termination at k= %d\n", k); |
---|
| 1372 | } |
---|
| 1373 | bAig_ExpandTimeFrame(network, manager, k+1, BMC_INITIAL_STATES); |
---|
| 1374 | simplePath = BmcCirCUsSimlePathConstraint(network, 0, k, nodeToMvfAigTable, |
---|
| 1375 | coiIndexTable, BMC_INITIAL_STATES); |
---|
| 1376 | options->cnfPrefix = k; |
---|
| 1377 | etInterface = BmcCirCUsInterface(manager, network, |
---|
| 1378 | simplePath, |
---|
| 1379 | previousResultArray, |
---|
| 1380 | options, etInterface); |
---|
| 1381 | if(etInterface->status == SAT_UNSAT){ |
---|
| 1382 | formulaStatus = BmcPropertyPassed_c; |
---|
| 1383 | if (options->verbosityLevel >= BmcVerbosityMax_c) { |
---|
| 1384 | (void) fprintf(vis_stdout, "# BMC: by early termination\n"); |
---|
| 1385 | } |
---|
| 1386 | break; |
---|
| 1387 | } |
---|
| 1388 | } /* Early termination */ |
---|
| 1389 | /* |
---|
| 1390 | Check for \beta''(k) |
---|
| 1391 | */ |
---|
| 1392 | if(checkLevel == 0){ |
---|
| 1393 | if (options->verbosityLevel == BmcVerbosityMax_c) { |
---|
| 1394 | (void) fprintf(vis_stdout, "# BMC: Check Beta''\n"); |
---|
| 1395 | } |
---|
| 1396 | |
---|
| 1397 | bAig_ExpandTimeFrame(network, manager, k+2, BMC_NO_INITIAL_STATES); |
---|
| 1398 | simplePath = BmcCirCUsSimlePathConstraint(network, 0, k+1, nodeToMvfAigTable, |
---|
| 1399 | coiIndexTable, BMC_NO_INITIAL_STATES); |
---|
| 1400 | property = bAig_One; |
---|
| 1401 | for(i=1; i<=k+1; i++){ |
---|
| 1402 | property = bAig_And(manager, property, |
---|
| 1403 | bAig_Not(BmcCirCUsCreatebAigOfPropFormula( |
---|
| 1404 | network, manager, i, |
---|
| 1405 | propFormula, BMC_NO_INITIAL_STATES))); |
---|
| 1406 | } |
---|
| 1407 | property = bAig_And(manager, property, |
---|
| 1408 | BmcCirCUsCreatebAigOfPropFormula( |
---|
| 1409 | network, manager, 0, |
---|
| 1410 | propFormula, BMC_NO_INITIAL_STATES)); |
---|
| 1411 | options->cnfPrefix = k+1; |
---|
| 1412 | tInterface = 0; |
---|
| 1413 | tInterface = BmcCirCUsInterface(manager, network, |
---|
| 1414 | bAig_And(manager, property, simplePath), |
---|
| 1415 | previousResultArray, options, tInterface); |
---|
| 1416 | if(tInterface->status == SAT_UNSAT){ |
---|
| 1417 | m = k; |
---|
| 1418 | if (options->verbosityLevel >= BmcVerbosityMax_c) { |
---|
| 1419 | (void)fprintf(vis_stderr,"m = %d\n", m); |
---|
| 1420 | } |
---|
| 1421 | checkLevel = 1; |
---|
| 1422 | } |
---|
| 1423 | } /* Check for Beta'' */ |
---|
| 1424 | /* |
---|
| 1425 | Check for \beta'(k) |
---|
| 1426 | */ |
---|
| 1427 | if(checkLevel == 0){ |
---|
| 1428 | if (options->verbosityLevel == BmcVerbosityMax_c) { |
---|
| 1429 | (void) fprintf(vis_stdout, "# BMC: Check Beta'\n"); |
---|
| 1430 | } |
---|
| 1431 | bAig_ExpandTimeFrame(network, manager, k+2, BMC_NO_INITIAL_STATES); |
---|
| 1432 | simplePath = BmcCirCUsSimlePathConstraint(network, 0, k+1, nodeToMvfAigTable, |
---|
| 1433 | coiIndexTable, BMC_NO_INITIAL_STATES); |
---|
| 1434 | property = bAig_One; |
---|
| 1435 | for(i=0; i<=k; i++){ |
---|
| 1436 | property = bAig_And(manager, property, |
---|
| 1437 | bAig_Not(BmcCirCUsCreatebAigOfPropFormula( |
---|
| 1438 | network, manager, i, |
---|
| 1439 | propFormula, BMC_NO_INITIAL_STATES))); |
---|
| 1440 | } |
---|
| 1441 | property = bAig_And(manager, property, |
---|
| 1442 | BmcCirCUsCreatebAigOfPropFormula( |
---|
| 1443 | network, manager, k+1, |
---|
| 1444 | propFormula, BMC_NO_INITIAL_STATES)); |
---|
| 1445 | options->cnfPrefix = k+1; |
---|
| 1446 | tInterface = 0; |
---|
| 1447 | tInterface = BmcCirCUsInterface(manager, network, |
---|
| 1448 | bAig_And(manager, property, simplePath), |
---|
| 1449 | previousResultArray, options, tInterface); |
---|
| 1450 | if(tInterface->status == SAT_UNSAT){ |
---|
| 1451 | m = k; |
---|
| 1452 | if (options->verbosityLevel >= BmcVerbosityMax_c) { |
---|
| 1453 | (void)fprintf(vis_stderr,"m = %d\n", m); |
---|
| 1454 | } |
---|
| 1455 | checkLevel = 1; |
---|
| 1456 | } |
---|
| 1457 | } /* Check for Beta' */ |
---|
| 1458 | /* |
---|
| 1459 | Check for Beta |
---|
| 1460 | */ |
---|
| 1461 | if(checkLevel == 1){ |
---|
| 1462 | if (options->verbosityLevel == BmcVerbosityMax_c) { |
---|
| 1463 | (void) fprintf(vis_stdout, "# BMC: Check Beta\n"); |
---|
| 1464 | } |
---|
| 1465 | bAig_ExpandTimeFrame(network, manager, k+2, BMC_NO_INITIAL_STATES); |
---|
| 1466 | simplePath = BmcCirCUsSimlePathConstraint(network, 0, k+1, nodeToMvfAigTable, |
---|
| 1467 | coiIndexTable, BMC_NO_INITIAL_STATES); |
---|
| 1468 | property = bAig_And(manager, |
---|
| 1469 | bAig_Not(BmcCirCUsCreatebAigOfPropFormula( |
---|
| 1470 | network, manager, k, |
---|
| 1471 | propFormula, BMC_NO_INITIAL_STATES)), |
---|
| 1472 | BmcCirCUsCreatebAigOfPropFormula( |
---|
| 1473 | network, manager, k+1, |
---|
| 1474 | propFormula, BMC_NO_INITIAL_STATES)); |
---|
| 1475 | options->cnfPrefix = k+1; |
---|
| 1476 | tInterface = BmcCirCUsInterface(manager, network, |
---|
| 1477 | bAig_And(manager, property, simplePath), |
---|
| 1478 | previousResultArray, options, tInterface); |
---|
| 1479 | if(tInterface->status == SAT_UNSAT){ |
---|
| 1480 | checkLevel = 2; |
---|
| 1481 | } |
---|
| 1482 | } /* Check Beta*/ |
---|
| 1483 | |
---|
| 1484 | if(checkLevel == 2){ /* we check Alpha if Beta is unsatisfiable */ |
---|
| 1485 | if (options->verbosityLevel == BmcVerbosityMax_c) { |
---|
| 1486 | (void) fprintf(vis_stdout, "# BMC: Check Alpha \n"); |
---|
| 1487 | } |
---|
| 1488 | bAig_ExpandTimeFrame(network, manager, k+1, BMC_INITIAL_STATES); |
---|
| 1489 | simplePath = BmcCirCUsSimlePathConstraint(network, 0, k, nodeToMvfAigTable, |
---|
| 1490 | coiIndexTable, BMC_INITIAL_STATES); |
---|
| 1491 | property = BmcCirCUsCreatebAigOfPropFormula( |
---|
| 1492 | network, manager, k, |
---|
| 1493 | propFormula, BMC_INITIAL_STATES); |
---|
| 1494 | options->cnfPrefix = k; |
---|
| 1495 | tInterface = 0; |
---|
| 1496 | tInterface = BmcCirCUsInterface(manager, network, |
---|
| 1497 | bAig_And(manager, property, simplePath), |
---|
| 1498 | previousResultArray, options, tInterface); |
---|
| 1499 | if(tInterface->status == SAT_UNSAT){ |
---|
| 1500 | n = k; |
---|
| 1501 | checkLevel = 3; |
---|
| 1502 | if (options->verbosityLevel == BmcVerbosityMax_c) { |
---|
| 1503 | (void)fprintf(vis_stdout,"Value of m=%d n=%d\n", m, n); |
---|
| 1504 | } |
---|
| 1505 | if (m+n-1 <= maxK){ |
---|
| 1506 | maxK = m+n-1; |
---|
| 1507 | checkLevel = 3; |
---|
| 1508 | } else { |
---|
| 1509 | checkLevel = 4; |
---|
| 1510 | } |
---|
| 1511 | } |
---|
| 1512 | }/* Chek for Alpha */ |
---|
| 1513 | |
---|
| 1514 | if (options->verbosityLevel != BmcVerbosityNone_c) { |
---|
| 1515 | endTime = util_cpu_ctime(); |
---|
| 1516 | fprintf(vis_stdout, "-- Check for termination time = %10g\n", |
---|
| 1517 | (double)(endTime - startTime) / 1000.0); |
---|
| 1518 | } |
---|
| 1519 | |
---|
| 1520 | } /* Check for termination */ |
---|
| 1521 | k += options->step; |
---|
| 1522 | } /* while result and k*/ |
---|
| 1523 | |
---|
| 1524 | if(formulaStatus == BmcPropertyFailed_c) { |
---|
| 1525 | (void) fprintf(vis_stdout, "# BMC: formula failed\n"); |
---|
| 1526 | if(options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 1527 | (void) fprintf(vis_stdout, |
---|
| 1528 | "# BMC: Found a counterexample of length = %d \n", k); |
---|
| 1529 | } |
---|
| 1530 | if(options->dbgLevel == 1){ |
---|
| 1531 | BmcCirCUsPrintCounterExample(network, nodeToMvfAigTable, coiTable, k, loop_array, |
---|
| 1532 | options, BMC_INITIAL_STATES); |
---|
| 1533 | } |
---|
| 1534 | if(options->dbgLevel == 2){ |
---|
| 1535 | BmcCirCUsPrintCounterExampleAiger(network, nodeToMvfAigTable, coiTable, k, loop_array, |
---|
| 1536 | options, BMC_INITIAL_STATES); |
---|
| 1537 | } |
---|
| 1538 | |
---|
| 1539 | array_free(loop_array); |
---|
| 1540 | } |
---|
| 1541 | if(checkLevel == 3){ |
---|
| 1542 | (void) fprintf(vis_stdout, "# BMC: no counterexample of length <= (m+n-1) %d is found \n", m+n-1); |
---|
| 1543 | formulaStatus = BmcPropertyPassed_c; |
---|
| 1544 | } |
---|
| 1545 | if(formulaStatus == BmcPropertyPassed_c) { |
---|
| 1546 | (void) fprintf(vis_stdout, "# BMC: formula Passed\n"); |
---|
| 1547 | (void) fprintf(vis_stdout, "# Termination depth = %d\n", k); |
---|
| 1548 | } else if(formulaStatus == BmcPropertyUndecided_c) { |
---|
| 1549 | (void) fprintf(vis_stdout,"# BMC: formula undecided\n"); |
---|
| 1550 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 1551 | (void) fprintf(vis_stdout, |
---|
| 1552 | "# BMC: no counterexample found of length up to %d\n", |
---|
| 1553 | maxK); |
---|
| 1554 | } |
---|
| 1555 | } |
---|
| 1556 | if (options->verbosityLevel != BmcVerbosityNone_c) { |
---|
| 1557 | endTime = util_cpu_ctime(); |
---|
| 1558 | fprintf(vis_stdout, "-- bmc time = %10g\n", |
---|
| 1559 | (double)(endTime - startTime) / 1000.0); |
---|
| 1560 | } |
---|
| 1561 | |
---|
| 1562 | array_free(previousResultArray); |
---|
| 1563 | |
---|
| 1564 | fflush(vis_stdout); |
---|
| 1565 | return; |
---|
| 1566 | } /* BmcCirCUsLtlVerifyGFp() */ |
---|
| 1567 | |
---|
| 1568 | /**Function******************************************************************** |
---|
| 1569 | |
---|
| 1570 | Synopsis [Use BMC technique to verify a general LTL formulae] |
---|
| 1571 | |
---|
| 1572 | Description [Implements the Bounded Model Checking technique as in the paper |
---|
| 1573 | "Symbolic Model Checking without BDDs". We also have implemented some of the |
---|
| 1574 | improvements in the BMC encoding as were described in the paper "Improving |
---|
| 1575 | the Encoding of LTL Model Checking into SAT". If snf=1, we use Separated |
---|
| 1576 | Normal Form technique to encode LTL properties, otherwise we use the original |
---|
| 1577 | encoding. ] |
---|
| 1578 | |
---|
| 1579 | SideEffects [] |
---|
| 1580 | |
---|
| 1581 | SeeAlso [] |
---|
| 1582 | |
---|
| 1583 | ******************************************************************************/ |
---|
| 1584 | |
---|
| 1585 | void |
---|
| 1586 | BmcCirCUsLtlVerifyGeneralLtl( |
---|
| 1587 | Ntk_Network_t *network, |
---|
| 1588 | Ctlsp_Formula_t *ltl, |
---|
| 1589 | st_table *coiTable, |
---|
| 1590 | array_t *constraintArray, |
---|
| 1591 | BmcOption_t *options, |
---|
| 1592 | int snf) |
---|
| 1593 | { |
---|
| 1594 | mAig_Manager_t *manager = Ntk_NetworkReadMAigManager(network); |
---|
| 1595 | st_table *nodeToMvfAigTable = NIL(st_table); |
---|
| 1596 | long startTime, endTime; |
---|
| 1597 | boolean fairness = (options->fairFile != NIL(FILE)); |
---|
| 1598 | int minK = options->minK; |
---|
| 1599 | int maxK = options->maxK; |
---|
| 1600 | boolean boundedFormula; |
---|
| 1601 | array_t *ltlConstraintArray = NIL(array_t); |
---|
| 1602 | array_t *fairnessArray = NIL(array_t); |
---|
| 1603 | int depth, l, bound, f, satFlag, i; |
---|
| 1604 | bAigEdge_t noLoop, loop, ploop; |
---|
| 1605 | bAigEdge_t result=bAig_NULL, temp, fair; |
---|
| 1606 | array_t *loop_arr = NIL(array_t); |
---|
| 1607 | array_t *objArray; |
---|
| 1608 | array_t *auxObjArray; |
---|
| 1609 | st_table *coiIndexTable; |
---|
| 1610 | Ctlsp_Formula_t *formula; |
---|
| 1611 | satInterface_t *interface; |
---|
| 1612 | array_t *formulaArray = NIL(array_t); |
---|
| 1613 | int nextAction = 0; |
---|
| 1614 | /* |
---|
| 1615 | Use when proving termination |
---|
| 1616 | */ |
---|
| 1617 | BmcCheckForTermination_t *terminationStatus = 0; |
---|
| 1618 | Bmc_PropertyStatus formulaStatus; |
---|
| 1619 | |
---|
| 1620 | nodeToMvfAigTable = |
---|
| 1621 | (st_table *) Ntk_NetworkReadApplInfo(network, |
---|
| 1622 | MVFAIG_NETWORK_APPL_KEY); |
---|
| 1623 | assert(nodeToMvfAigTable != NIL(st_table)); |
---|
| 1624 | |
---|
| 1625 | if(fairness) { |
---|
| 1626 | Ctlsp_Formula_t *formula; /* a generic LTL formula */ |
---|
| 1627 | int i; /* iteration variable */ |
---|
| 1628 | |
---|
| 1629 | ltlConstraintArray = array_alloc(Ctlsp_Formula_t *, 0); |
---|
| 1630 | |
---|
| 1631 | arrayForEachItem(Ctlsp_Formula_t *, constraintArray, i, formula) { |
---|
| 1632 | fprintf(vis_stdout, "Formula: ddd"); |
---|
| 1633 | Ctlsp_FormulaPrint(vis_stdout, formula); |
---|
| 1634 | fprintf(vis_stdout, "\n"); |
---|
| 1635 | BmcGetCoiForLtlFormula(network, formula, coiTable); |
---|
| 1636 | formula = Ctlsp_FormulaCreate(Ctlsp_F_c, formula, NIL(Ctlsp_Formula_t)); |
---|
| 1637 | array_insert_last(Ctlsp_Formula_t *, ltlConstraintArray, formula); |
---|
| 1638 | } |
---|
| 1639 | } |
---|
| 1640 | /* |
---|
| 1641 | For bounded formulae use a tighter upper bound if possible. |
---|
| 1642 | */ |
---|
| 1643 | boundedFormula = Ctlsp_LtlFormulaTestIsBounded(ltl, &depth); |
---|
| 1644 | if (boundedFormula && depth < maxK && depth >= minK) { |
---|
| 1645 | maxK = depth; |
---|
| 1646 | } else { |
---|
| 1647 | if(options->inductiveStep !=0){ |
---|
| 1648 | /* |
---|
| 1649 | Use the termination criteria to prove the property passes. |
---|
| 1650 | */ |
---|
| 1651 | terminationStatus = BmcAutTerminationAlloc(network, |
---|
| 1652 | Ctlsp_LtllFormulaNegate(ltl), |
---|
| 1653 | constraintArray); |
---|
| 1654 | assert(terminationStatus); |
---|
| 1655 | } |
---|
| 1656 | } |
---|
| 1657 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 1658 | (void) fprintf(vis_stdout, "General LTL BMC\n"); |
---|
| 1659 | if (boundedFormula){ |
---|
| 1660 | (void) fprintf(vis_stdout, "Bounded formula of depth %d\n", depth); |
---|
| 1661 | } |
---|
| 1662 | (void) fprintf(vis_stdout, "Apply BMC on counterexample of length >= %d and <= %d (+%d) \n", |
---|
| 1663 | minK, maxK, options->step); |
---|
| 1664 | } |
---|
| 1665 | bAig_ExpandTimeFrame(network, manager, 1, 1); |
---|
| 1666 | coiIndexTable = BmcCirCUsGetCoiIndexTable(network, coiTable); |
---|
| 1667 | interface = 0; |
---|
| 1668 | /* |
---|
| 1669 | Hold objects |
---|
| 1670 | */ |
---|
| 1671 | objArray = array_alloc(bAigEdge_t, 1); |
---|
| 1672 | /* |
---|
| 1673 | Hold auxiliary objects (constraints on the path) |
---|
| 1674 | */ |
---|
| 1675 | auxObjArray = array_alloc(bAigEdge_t, 0); |
---|
| 1676 | |
---|
| 1677 | formulaStatus = BmcPropertyUndecided_c; |
---|
| 1678 | bound = minK; |
---|
| 1679 | if(snf){ |
---|
| 1680 | formulaArray = Ctlsp_LtlTranslateIntoSNF(ltl); |
---|
| 1681 | } |
---|
| 1682 | startTime = util_cpu_ctime(); |
---|
| 1683 | while(bound<=maxK) { |
---|
| 1684 | if(options->verbosityLevel == BmcVerbosityMax_c){ |
---|
| 1685 | fprintf(vis_stdout, "\nGenerate counterexample of length %d\n", bound); |
---|
| 1686 | } |
---|
| 1687 | |
---|
| 1688 | loop_arr = 0; |
---|
| 1689 | bAig_ExpandTimeFrame(network, manager, bound+1, BMC_INITIAL_STATES); |
---|
| 1690 | |
---|
| 1691 | if(fairness){ |
---|
| 1692 | /* |
---|
| 1693 | In case of fairness constraints, we only include a loop part of BMC |
---|
| 1694 | encoding |
---|
| 1695 | */ |
---|
| 1696 | noLoop = bAig_Zero; |
---|
| 1697 | } else { |
---|
| 1698 | if(snf){ |
---|
| 1699 | noLoop = BmcCirCUsGenerateLogicForLtlSNF(network, formulaArray, 0, bound, -1); |
---|
| 1700 | } else { |
---|
| 1701 | noLoop = BmcCirCUsGenerateLogicForLtl(network, ltl, 0, bound, -1); |
---|
| 1702 | } |
---|
| 1703 | } |
---|
| 1704 | result = noLoop; |
---|
| 1705 | if(noLoop != bAig_One) { |
---|
| 1706 | loop_arr = array_alloc(bAigEdge_t, 0); |
---|
| 1707 | for(l=0; l<=bound; l++) { |
---|
| 1708 | if(snf){ |
---|
| 1709 | loop = BmcCirCUsGenerateLogicForLtlSNF(network, formulaArray, 0, |
---|
| 1710 | bound, l); |
---|
| 1711 | } else { |
---|
| 1712 | loop = BmcCirCUsGenerateLogicForLtl(network, ltl, 0, bound, l); |
---|
| 1713 | } |
---|
| 1714 | if(loop == bAig_Zero) continue; |
---|
| 1715 | |
---|
| 1716 | if(fairness) { |
---|
| 1717 | fairnessArray = array_alloc(bAigEdge_t, 0); |
---|
| 1718 | arrayForEachItem(Ctlsp_Formula_t *, ltlConstraintArray, i, formula) { |
---|
| 1719 | fair = BmcCirCUsGenerateLogicForLtl(network, formula, l, bound, -1); |
---|
| 1720 | array_insert_last(bAigEdge_t, fairnessArray, fair); |
---|
| 1721 | } |
---|
| 1722 | } |
---|
| 1723 | |
---|
| 1724 | if(loop != bAig_Zero) { |
---|
| 1725 | ploop = BmcCirCUsConnectFromStateToState(network, bound, l, nodeToMvfAigTable, coiIndexTable, 1); |
---|
| 1726 | array_insert(bAigEdge_t, loop_arr, l, ploop); |
---|
| 1727 | temp = bAig_And(manager, loop, ploop); |
---|
| 1728 | if(fairness) { |
---|
| 1729 | for(f=0; f < array_n(fairnessArray); f++){ |
---|
| 1730 | fair = array_fetch(bAigEdge_t, fairnessArray, f); |
---|
| 1731 | temp = bAig_And(manager, temp, fair); |
---|
| 1732 | } |
---|
| 1733 | } |
---|
| 1734 | result = bAig_Or(manager, result, temp); |
---|
| 1735 | } |
---|
| 1736 | if(fairness){ |
---|
| 1737 | array_free(fairnessArray); |
---|
| 1738 | } |
---|
| 1739 | } |
---|
| 1740 | } |
---|
| 1741 | /* |
---|
| 1742 | loop = result; |
---|
| 1743 | |
---|
| 1744 | if((noLoop == bAig_Zero) && (loop == bAig_Zero)){ |
---|
| 1745 | */ |
---|
| 1746 | /* |
---|
| 1747 | result = noLoop | loop(0) | loop(1) ... | loop(bound) |
---|
| 1748 | */ |
---|
| 1749 | |
---|
| 1750 | if(result == bAig_Zero){ |
---|
| 1751 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 1752 | fprintf(vis_stdout,"# BMC: the formula is trivially true"); |
---|
| 1753 | fprintf(vis_stdout," for counterexamples of length %d\n", bound); |
---|
| 1754 | } |
---|
| 1755 | } else { |
---|
| 1756 | array_insert(bAigEdge_t, objArray, 0, result); |
---|
| 1757 | options->cnfPrefix = bound; |
---|
| 1758 | interface = BmcCirCUsInterfaceWithObjArr(manager, network, |
---|
| 1759 | objArray, auxObjArray, |
---|
| 1760 | options, interface); |
---|
| 1761 | satFlag = interface->status; |
---|
| 1762 | if(satFlag == SAT_SAT) { |
---|
| 1763 | formulaStatus = BmcPropertyFailed_c; |
---|
| 1764 | break; |
---|
| 1765 | } |
---|
| 1766 | array_insert_last(bAigEdge_t, auxObjArray, bAig_Not(result)); |
---|
| 1767 | } |
---|
| 1768 | /* |
---|
| 1769 | Use the termination check if the the LTL formula is not bounded |
---|
| 1770 | */ |
---|
| 1771 | if(!boundedFormula && |
---|
| 1772 | (formulaStatus == BmcPropertyUndecided_c) && |
---|
| 1773 | (nextAction != 1)){ |
---|
| 1774 | if((options->inductiveStep !=0) && |
---|
| 1775 | (bound % options->inductiveStep == 0)) |
---|
| 1776 | { |
---|
| 1777 | /* |
---|
| 1778 | Check for termination for the current value of k. |
---|
| 1779 | */ |
---|
| 1780 | terminationStatus->k = bound; |
---|
| 1781 | BmcCirCUsAutLtlCheckForTermination(network, manager, |
---|
| 1782 | nodeToMvfAigTable, |
---|
| 1783 | terminationStatus, |
---|
| 1784 | coiIndexTable, options); |
---|
| 1785 | nextAction = terminationStatus->action; |
---|
| 1786 | if(nextAction == 1){ |
---|
| 1787 | maxK = terminationStatus->k; |
---|
| 1788 | } else |
---|
| 1789 | if(nextAction == 3){ |
---|
| 1790 | formulaStatus = BmcPropertyPassed_c; |
---|
| 1791 | break; |
---|
| 1792 | } |
---|
| 1793 | } |
---|
| 1794 | } /* terminationStatus */ |
---|
| 1795 | |
---|
| 1796 | if(loop_arr) { |
---|
| 1797 | array_free(loop_arr); |
---|
| 1798 | } |
---|
| 1799 | bound += options->step; |
---|
| 1800 | } |
---|
| 1801 | array_free(objArray); |
---|
| 1802 | array_free(auxObjArray); |
---|
| 1803 | st_free_table(coiIndexTable); |
---|
| 1804 | sat_FreeInterface(interface); |
---|
| 1805 | |
---|
| 1806 | if(formulaStatus == BmcPropertyUndecided_c){ |
---|
| 1807 | if(nextAction == 1){ |
---|
| 1808 | /* |
---|
| 1809 | No counterexample of length up to maxK is found. By termination |
---|
| 1810 | criterion, formula passes |
---|
| 1811 | */ |
---|
| 1812 | formulaStatus = BmcPropertyPassed_c; |
---|
| 1813 | } else |
---|
| 1814 | if (boundedFormula && depth <= options->maxK){ |
---|
| 1815 | /* |
---|
| 1816 | No counterexample of length up to the bounded depth of the LTL formula is |
---|
| 1817 | found. Formula passes |
---|
| 1818 | */ |
---|
| 1819 | formulaStatus = BmcPropertyPassed_c; |
---|
| 1820 | } |
---|
| 1821 | } |
---|
| 1822 | |
---|
| 1823 | if(options->satSolverError){ |
---|
| 1824 | (void) fprintf(vis_stdout,"# BMC: Error in calling SAT solver\n"); |
---|
| 1825 | } else { |
---|
| 1826 | if(formulaStatus == BmcPropertyFailed_c) { |
---|
| 1827 | (void) fprintf(vis_stdout, "# BMC: formula failed\n"); |
---|
| 1828 | if(options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 1829 | (void) fprintf(vis_stdout, |
---|
| 1830 | "# BMC: Found a counterexample of length = %d \n", bound); |
---|
| 1831 | } |
---|
| 1832 | if (options->dbgLevel == 1) { |
---|
| 1833 | BmcCirCUsPrintCounterExample(network, nodeToMvfAigTable, coiTable, bound, loop_arr, |
---|
| 1834 | options, BMC_INITIAL_STATES); |
---|
| 1835 | } |
---|
| 1836 | if (options->dbgLevel == 2) { |
---|
| 1837 | BmcCirCUsPrintCounterExampleAiger(network, nodeToMvfAigTable, coiTable, bound, loop_arr, |
---|
| 1838 | options, BMC_INITIAL_STATES); |
---|
| 1839 | } |
---|
| 1840 | } else if(formulaStatus == BmcPropertyPassed_c) { |
---|
| 1841 | (void) fprintf(vis_stdout, "# BMC: formula Passed\n"); |
---|
| 1842 | (void) fprintf(vis_stdout, "# Termination depth = %d\n", maxK); |
---|
| 1843 | } else if(formulaStatus == BmcPropertyUndecided_c) { |
---|
| 1844 | (void) fprintf(vis_stdout,"# BMC: formula undecided\n"); |
---|
| 1845 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 1846 | (void) fprintf(vis_stdout, |
---|
| 1847 | "# BMC: no counterexample found of length up to %d\n", |
---|
| 1848 | maxK); |
---|
| 1849 | } |
---|
| 1850 | } |
---|
| 1851 | } |
---|
| 1852 | |
---|
| 1853 | /* |
---|
| 1854 | free all used memories |
---|
| 1855 | */ |
---|
| 1856 | if(terminationStatus){ |
---|
| 1857 | BmcAutTerminationFree(terminationStatus); |
---|
| 1858 | } |
---|
| 1859 | if(fairness){ |
---|
| 1860 | array_free(ltlConstraintArray); |
---|
| 1861 | } |
---|
| 1862 | if(snf){ |
---|
| 1863 | Ctlsp_FormulaArrayFree(formulaArray); |
---|
| 1864 | } |
---|
| 1865 | if (options->verbosityLevel != BmcVerbosityNone_c) { |
---|
| 1866 | endTime = util_cpu_ctime(); |
---|
| 1867 | fprintf(vis_stdout, "-- bmc time = %10g\n", (double)(endTime - startTime) / 1000.0); |
---|
| 1868 | } |
---|
| 1869 | |
---|
| 1870 | fflush(vis_stdout); |
---|
| 1871 | } |
---|
| 1872 | |
---|
| 1873 | /**Function******************************************************************** |
---|
| 1874 | |
---|
| 1875 | Synopsis [Verify LTL property using BMC] |
---|
| 1876 | |
---|
| 1877 | Description [We use the encoding of "Simple Bounded LTL Model |
---|
| 1878 | Checking", FMCAD04] |
---|
| 1879 | |
---|
| 1880 | SideEffects [] |
---|
| 1881 | |
---|
| 1882 | SeeAlso [BmcCirCUsConnectFromStateToState] |
---|
| 1883 | |
---|
| 1884 | ******************************************************************************/ |
---|
| 1885 | void |
---|
| 1886 | BmcCirCUsLtlVerifyGeneralLtlFixPoint( |
---|
| 1887 | Ntk_Network_t *network, |
---|
| 1888 | Ctlsp_Formula_t *ltl, |
---|
| 1889 | st_table *coiTable, |
---|
| 1890 | array_t *constraintArray, |
---|
| 1891 | BmcOption_t *options) |
---|
| 1892 | { |
---|
| 1893 | mAig_Manager_t *manager = Ntk_NetworkReadMAigManager(network); |
---|
| 1894 | st_table *nodeToMvfAigTable = NIL(st_table); |
---|
| 1895 | long startTime, endTime; |
---|
| 1896 | bAigEdge_t property, fair; |
---|
| 1897 | boolean fairness = (options->fairFile != NIL(FILE)); |
---|
| 1898 | int minK = options->minK; |
---|
| 1899 | int maxK = options->maxK; |
---|
| 1900 | boolean boundedFormula; |
---|
| 1901 | array_t *ltlConstraintArray = NIL(array_t); |
---|
| 1902 | array_t *objArray; |
---|
| 1903 | array_t *auxObjArray; |
---|
| 1904 | st_table *coiIndexTable; |
---|
| 1905 | Ctlsp_Formula_t *formula; |
---|
| 1906 | satInterface_t *interface; |
---|
| 1907 | int nextAction = 0; |
---|
| 1908 | |
---|
| 1909 | BmcCheckForTermination_t *terminationStatus = 0; |
---|
| 1910 | Bmc_PropertyStatus formulaStatus; |
---|
| 1911 | |
---|
| 1912 | array_t *loopArray = NIL(array_t), *smallerExists; |
---|
| 1913 | bAigEdge_t tmp, loop, atMostOnce, loopConstraints; |
---|
| 1914 | int i, k, depth, satFlag; |
---|
| 1915 | |
---|
| 1916 | startTime = util_cpu_ctime(); |
---|
| 1917 | |
---|
| 1918 | nodeToMvfAigTable = |
---|
| 1919 | (st_table *) Ntk_NetworkReadApplInfo(network, |
---|
| 1920 | MVFAIG_NETWORK_APPL_KEY); |
---|
| 1921 | assert(nodeToMvfAigTable != NIL(st_table)); |
---|
| 1922 | |
---|
| 1923 | if(fairness) { |
---|
| 1924 | ltlConstraintArray = array_alloc(Ctlsp_Formula_t *, 0); |
---|
| 1925 | |
---|
| 1926 | arrayForEachItem(Ctlsp_Formula_t *, constraintArray, i, formula) { |
---|
| 1927 | BmcGetCoiForLtlFormula(network, formula, coiTable); |
---|
| 1928 | formula = Ctlsp_FormulaCreate(Ctlsp_F_c, formula, NIL(Ctlsp_Formula_t)); |
---|
| 1929 | array_insert(Ctlsp_Formula_t *, ltlConstraintArray, i, formula); |
---|
| 1930 | } |
---|
| 1931 | } |
---|
| 1932 | |
---|
| 1933 | /* |
---|
| 1934 | For bounded formulae use a tighter upper bound if possible. |
---|
| 1935 | */ |
---|
| 1936 | boundedFormula = Ctlsp_LtlFormulaTestIsBounded(ltl, &depth); |
---|
| 1937 | if (boundedFormula && depth < maxK && depth >= minK) { |
---|
| 1938 | maxK = depth; |
---|
| 1939 | } else { |
---|
| 1940 | if(options->inductiveStep !=0){ |
---|
| 1941 | /* |
---|
| 1942 | Use the termination criteria to prove the property passes. |
---|
| 1943 | */ |
---|
| 1944 | terminationStatus = BmcAutTerminationAlloc(network, |
---|
| 1945 | Ctlsp_LtllFormulaNegate(ltl), |
---|
| 1946 | constraintArray); |
---|
| 1947 | assert(terminationStatus); |
---|
| 1948 | } |
---|
| 1949 | } |
---|
| 1950 | |
---|
| 1951 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 1952 | (void) fprintf(vis_stdout, "General LTL BMC\n"); |
---|
| 1953 | (void) fprintf(vis_stdout, "Apply BMC on counterexample of length >= %d and <= %d (+%d) \n", |
---|
| 1954 | minK, maxK, options->step); |
---|
| 1955 | } |
---|
| 1956 | |
---|
| 1957 | bAig_ExpandTimeFrame(network, manager, 1, BMC_INITIAL_STATES); |
---|
| 1958 | /* |
---|
| 1959 | We need the above line inorder to run the next one. |
---|
| 1960 | */ |
---|
| 1961 | coiIndexTable = BmcCirCUsGetCoiIndexTable(network, coiTable); |
---|
| 1962 | interface = 0; |
---|
| 1963 | |
---|
| 1964 | /* |
---|
| 1965 | Hold objects |
---|
| 1966 | */ |
---|
| 1967 | objArray = array_alloc(bAigEdge_t, 3); |
---|
| 1968 | /* |
---|
| 1969 | Hold auxiliary objects (constraints on the path) |
---|
| 1970 | */ |
---|
| 1971 | auxObjArray = array_alloc(bAigEdge_t, 0); |
---|
| 1972 | |
---|
| 1973 | formulaStatus = BmcPropertyUndecided_c; |
---|
| 1974 | k = minK; |
---|
| 1975 | while(k<=maxK) { |
---|
| 1976 | if(options->verbosityLevel == BmcVerbosityMax_c){ |
---|
| 1977 | fprintf(vis_stdout, "\nGenerate counterexample of length %d\n", k); |
---|
| 1978 | } |
---|
| 1979 | bAig_ExpandTimeFrame(network, manager, k+1, BMC_INITIAL_STATES); |
---|
| 1980 | |
---|
| 1981 | loopArray = array_alloc(bAigEdge_t, k+1); |
---|
| 1982 | array_insert(bAigEdge_t, loopArray, 0, bAig_Zero); |
---|
| 1983 | smallerExists = array_alloc(bAigEdge_t, k+1); |
---|
| 1984 | array_insert(bAigEdge_t, smallerExists, 0, bAig_Zero); |
---|
| 1985 | |
---|
| 1986 | loop = bAig_One; |
---|
| 1987 | for(i=1; i<= k; i++){ |
---|
| 1988 | tmp = bAig_CreateNode(manager, bAig_NULL, bAig_NULL); |
---|
| 1989 | array_insert(bAigEdge_t, loopArray, i, tmp); |
---|
| 1990 | tmp = bAig_Then(manager, tmp, |
---|
| 1991 | BmcCirCUsConnectFromStateToState(network, k-1, i-1, nodeToMvfAigTable, |
---|
| 1992 | coiIndexTable, BMC_INITIAL_STATES)); |
---|
| 1993 | loop = bAig_And(manager, loop, tmp); |
---|
| 1994 | } |
---|
| 1995 | array_insert(bAigEdge_t, smallerExists, 1, bAig_Zero); |
---|
| 1996 | for(i=1; i<= k; i++){ |
---|
| 1997 | bAigEdge_t left, right; |
---|
| 1998 | |
---|
| 1999 | left = array_fetch(bAigEdge_t, smallerExists, i); |
---|
| 2000 | right = array_fetch(bAigEdge_t, loopArray, i); |
---|
| 2001 | |
---|
| 2002 | array_insert(bAigEdge_t, smallerExists, i+1, |
---|
| 2003 | bAig_Or(manager, left, right)); |
---|
| 2004 | } |
---|
| 2005 | atMostOnce = bAig_One; |
---|
| 2006 | for(i=1; i<= k; i++){ |
---|
| 2007 | bAigEdge_t left, right; |
---|
| 2008 | |
---|
| 2009 | left = array_fetch(bAigEdge_t, smallerExists, i); |
---|
| 2010 | right = array_fetch(bAigEdge_t, loopArray, i); |
---|
| 2011 | |
---|
| 2012 | tmp = bAig_Then(manager, left, bAig_Not(right)); |
---|
| 2013 | atMostOnce = bAig_And(manager, atMostOnce, tmp); |
---|
| 2014 | } |
---|
| 2015 | |
---|
| 2016 | loopConstraints = bAig_And(manager, loop, atMostOnce); |
---|
| 2017 | |
---|
| 2018 | property = BmcCirCUsGenerateLogicForLtlFixPoint(network, ltl, 0, k, loopArray); |
---|
| 2019 | |
---|
| 2020 | if(fairness) { |
---|
| 2021 | fair = bAig_One; |
---|
| 2022 | arrayForEachItem(Ctlsp_Formula_t *, ltlConstraintArray, i, formula) { |
---|
| 2023 | fair = bAig_And(manager, fair, |
---|
| 2024 | BmcCirCUsGenerateLogicForLtlFixPoint(network, formula, |
---|
| 2025 | 0, k, loopArray)); |
---|
| 2026 | } |
---|
| 2027 | array_insert(bAigEdge_t, objArray, 2, fair); |
---|
| 2028 | } else { |
---|
| 2029 | array_insert(bAigEdge_t, objArray, 2, bAig_One); |
---|
| 2030 | } |
---|
| 2031 | |
---|
| 2032 | array_insert(bAigEdge_t, objArray, 0, loopConstraints); |
---|
| 2033 | array_insert(bAigEdge_t, objArray, 1, property); |
---|
| 2034 | options->cnfPrefix = k; |
---|
| 2035 | interface = BmcCirCUsInterfaceWithObjArr(manager, network, |
---|
| 2036 | objArray, objArray, |
---|
| 2037 | options, interface); |
---|
| 2038 | array_free(smallerExists); |
---|
| 2039 | |
---|
| 2040 | satFlag = interface->status; |
---|
| 2041 | if(satFlag == SAT_SAT) { |
---|
| 2042 | formulaStatus = BmcPropertyFailed_c; |
---|
| 2043 | break; |
---|
| 2044 | } |
---|
| 2045 | array_free(loopArray); |
---|
| 2046 | /* |
---|
| 2047 | Use the termination check if the the LTL formula is not bounded |
---|
| 2048 | */ |
---|
| 2049 | if(!boundedFormula && |
---|
| 2050 | (formulaStatus == BmcPropertyUndecided_c) && |
---|
| 2051 | (nextAction != 1)){ |
---|
| 2052 | if((options->inductiveStep !=0) && |
---|
| 2053 | (k % options->inductiveStep == 0)) |
---|
| 2054 | { |
---|
| 2055 | /* |
---|
| 2056 | Check for termination for the current value of k. |
---|
| 2057 | */ |
---|
| 2058 | terminationStatus->k = k; |
---|
| 2059 | BmcCirCUsAutLtlCheckForTermination(network, manager, |
---|
| 2060 | nodeToMvfAigTable, |
---|
| 2061 | terminationStatus, |
---|
| 2062 | coiIndexTable, options); |
---|
| 2063 | nextAction = terminationStatus->action; |
---|
| 2064 | if(nextAction == 1){ |
---|
| 2065 | maxK = terminationStatus->k; |
---|
| 2066 | } else |
---|
| 2067 | if(nextAction == 3){ |
---|
| 2068 | formulaStatus = BmcPropertyPassed_c; |
---|
| 2069 | maxK = k; |
---|
| 2070 | break; |
---|
| 2071 | } |
---|
| 2072 | |
---|
| 2073 | } |
---|
| 2074 | } /* terminationStatus */ |
---|
| 2075 | |
---|
| 2076 | k += options->step; |
---|
| 2077 | } |
---|
| 2078 | array_free(objArray); |
---|
| 2079 | array_free(auxObjArray); |
---|
| 2080 | st_free_table(coiIndexTable); |
---|
| 2081 | sat_FreeInterface(interface); |
---|
| 2082 | |
---|
| 2083 | if(formulaStatus == BmcPropertyUndecided_c){ |
---|
| 2084 | /* |
---|
| 2085 | If no counterexample of length up to a certain bound, then the property |
---|
| 2086 | passes. |
---|
| 2087 | */ |
---|
| 2088 | if(nextAction == 1){ |
---|
| 2089 | formulaStatus = BmcPropertyPassed_c; |
---|
| 2090 | } else |
---|
| 2091 | if (boundedFormula && depth <= options->maxK){ |
---|
| 2092 | formulaStatus = BmcPropertyPassed_c; |
---|
| 2093 | } |
---|
| 2094 | } |
---|
| 2095 | if(options->satSolverError){ |
---|
| 2096 | (void) fprintf(vis_stdout,"# BMC: Error in calling SAT solver\n"); |
---|
| 2097 | } else { |
---|
| 2098 | if(formulaStatus == BmcPropertyFailed_c) { |
---|
| 2099 | (void) fprintf(vis_stdout, "# BMC: formula failed\n"); |
---|
| 2100 | if(options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 2101 | (void) fprintf(vis_stdout, |
---|
| 2102 | "# BMC: Found a counterexample of length = %d \n", k); |
---|
| 2103 | } |
---|
| 2104 | if (options->dbgLevel == 1) { |
---|
| 2105 | int loop = k; |
---|
| 2106 | /* |
---|
| 2107 | Adjust loopArray to print a proper counterexample. The encoding |
---|
| 2108 | scheme does not differentiate between loop and no-loop path. If the |
---|
| 2109 | path has a loop, then the path length is k-1. |
---|
| 2110 | */ |
---|
| 2111 | for(i=1; i< k; i++){ |
---|
| 2112 | bAigEdge_t v = array_fetch(bAigEdge_t, loopArray, i+1); |
---|
| 2113 | unsigned int lvalue = aig_value(v); |
---|
| 2114 | |
---|
| 2115 | if(lvalue == 1) { |
---|
| 2116 | loop = k-1; |
---|
| 2117 | } |
---|
| 2118 | array_insert(bAigEdge_t, loopArray, i, v); |
---|
| 2119 | } |
---|
| 2120 | if (options->dbgLevel == 1) { |
---|
| 2121 | BmcCirCUsPrintCounterExample(network, nodeToMvfAigTable, |
---|
| 2122 | coiTable, loop, loopArray, |
---|
| 2123 | options, BMC_INITIAL_STATES); |
---|
| 2124 | } |
---|
| 2125 | if (options->dbgLevel == 1) { |
---|
| 2126 | BmcCirCUsPrintCounterExampleAiger(network, nodeToMvfAigTable, |
---|
| 2127 | coiTable, loop, loopArray, |
---|
| 2128 | options, BMC_INITIAL_STATES); |
---|
| 2129 | } |
---|
| 2130 | array_free(loopArray); |
---|
| 2131 | } |
---|
| 2132 | } else if(formulaStatus == BmcPropertyPassed_c) { |
---|
| 2133 | (void) fprintf(vis_stdout, "# BMC: formula Passed\n"); |
---|
| 2134 | (void) fprintf(vis_stdout, "# Termination depth = %d\n", maxK); |
---|
| 2135 | } else if(formulaStatus == BmcPropertyUndecided_c) { |
---|
| 2136 | (void) fprintf(vis_stdout,"# BMC: formula undecided\n"); |
---|
| 2137 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 2138 | (void) fprintf(vis_stdout, |
---|
| 2139 | "# BMC: no counterexample found of length up to %d\n", |
---|
| 2140 | maxK); |
---|
| 2141 | } |
---|
| 2142 | } |
---|
| 2143 | } |
---|
| 2144 | |
---|
| 2145 | /* |
---|
| 2146 | free all used memories |
---|
| 2147 | */ |
---|
| 2148 | if(terminationStatus){ |
---|
| 2149 | BmcAutTerminationFree(terminationStatus); |
---|
| 2150 | } |
---|
| 2151 | if(fairness){ |
---|
| 2152 | array_free(ltlConstraintArray); |
---|
| 2153 | } |
---|
| 2154 | |
---|
| 2155 | if (options->verbosityLevel != BmcVerbosityNone_c) { |
---|
| 2156 | endTime = util_cpu_ctime(); |
---|
| 2157 | fprintf(vis_stdout, "-- bmc time = %10g\n", (double)(endTime - startTime) / 1000.0); |
---|
| 2158 | } |
---|
| 2159 | |
---|
| 2160 | fflush(vis_stdout); |
---|
| 2161 | } |
---|
| 2162 | |
---|
| 2163 | |
---|
| 2164 | /**Function******************************************************************** |
---|
| 2165 | |
---|
| 2166 | Synopsis [Apply BMC on a safety properties] |
---|
| 2167 | |
---|
| 2168 | Description [] |
---|
| 2169 | |
---|
| 2170 | SideEffects [] |
---|
| 2171 | |
---|
| 2172 | SeeAlso [] |
---|
| 2173 | |
---|
| 2174 | ******************************************************************************/ |
---|
| 2175 | |
---|
| 2176 | void |
---|
| 2177 | BmcCirCUsLtlCheckSafety( |
---|
| 2178 | Ntk_Network_t *network, |
---|
| 2179 | Ctlsp_Formula_t *ltl, |
---|
| 2180 | BmcOption_t *options, |
---|
| 2181 | st_table *coiTable) |
---|
| 2182 | { |
---|
| 2183 | mAig_Manager_t *manager = Ntk_NetworkReadMAigManager(network); |
---|
| 2184 | st_table *nodeToMvfAigTable = NIL(st_table); |
---|
| 2185 | long startTime, endTime; |
---|
| 2186 | bAigEdge_t noLoop; |
---|
| 2187 | int depth, satFlag, bound; |
---|
| 2188 | int minK = options->minK; |
---|
| 2189 | int maxK = options->maxK; |
---|
| 2190 | int boundedFormula; |
---|
| 2191 | array_t *previousResultArray; |
---|
| 2192 | satInterface_t *interface; |
---|
| 2193 | array_t *objArray; |
---|
| 2194 | BmcCheckForTermination_t *terminationStatus = 0; |
---|
| 2195 | Bmc_PropertyStatus formulaStatus; |
---|
| 2196 | st_table *coiIndexTable; |
---|
| 2197 | |
---|
| 2198 | assert(Ctlsp_LtlFormulaTestIsSyntacticallyCoSafe(ltl)); |
---|
| 2199 | |
---|
| 2200 | startTime = util_cpu_ctime(); |
---|
| 2201 | |
---|
| 2202 | nodeToMvfAigTable = |
---|
| 2203 | (st_table *) Ntk_NetworkReadApplInfo(network, |
---|
| 2204 | MVFAIG_NETWORK_APPL_KEY); |
---|
| 2205 | assert(nodeToMvfAigTable != NIL(st_table)); |
---|
| 2206 | |
---|
| 2207 | /* |
---|
| 2208 | For bounded formulae use a tighter upper bound if possible. |
---|
| 2209 | */ |
---|
| 2210 | boundedFormula = Ctlsp_LtlFormulaTestIsBounded(ltl, &depth); |
---|
| 2211 | if (boundedFormula && depth < maxK && depth >= minK) { |
---|
| 2212 | maxK = depth; |
---|
| 2213 | } else { |
---|
| 2214 | if(options->inductiveStep !=0){ |
---|
| 2215 | /* |
---|
| 2216 | Use the termination criteria to prove the property passes. |
---|
| 2217 | */ |
---|
| 2218 | terminationStatus = BmcAutTerminationAlloc(network, |
---|
| 2219 | Ctlsp_LtllFormulaNegate(ltl), |
---|
| 2220 | NIL(array_t)); |
---|
| 2221 | assert(Ltl_AutomatonGetStrength(terminationStatus->automaton) == 0); /* Terminal Automaton*/ |
---|
| 2222 | assert(terminationStatus); |
---|
| 2223 | } |
---|
| 2224 | } |
---|
| 2225 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 2226 | (void) fprintf(vis_stdout, "saftey LTL BMC\n"); |
---|
| 2227 | if (boundedFormula){ |
---|
| 2228 | (void) fprintf(vis_stdout, "Bounded formula of depth %d\n", depth); |
---|
| 2229 | } |
---|
| 2230 | (void) fprintf(vis_stdout, "Apply BMC on counterexample of length >= %d and <= %d (+%d) \n", |
---|
| 2231 | minK, maxK, options->step); |
---|
| 2232 | } |
---|
| 2233 | satFlag = SAT_UNSAT; |
---|
| 2234 | bAig_ExpandTimeFrame(network, manager, 0, BMC_INITIAL_STATES); |
---|
| 2235 | coiIndexTable = BmcCirCUsGetCoiIndexTable(network, coiTable); |
---|
| 2236 | interface = 0; |
---|
| 2237 | formulaStatus = BmcPropertyUndecided_c; |
---|
| 2238 | /* |
---|
| 2239 | Hold objects |
---|
| 2240 | */ |
---|
| 2241 | objArray = array_alloc(bAigEdge_t, 1); |
---|
| 2242 | |
---|
| 2243 | previousResultArray = array_alloc(bAigEdge_t, 0); |
---|
| 2244 | bound=minK; |
---|
| 2245 | while(bound<=maxK) { |
---|
| 2246 | |
---|
| 2247 | if(options->verbosityLevel == BmcVerbosityMax_c) |
---|
| 2248 | fprintf(vis_stdout, "\nGenerate counterexample of length %d\n", bound); |
---|
| 2249 | fflush(vis_stdout); |
---|
| 2250 | |
---|
| 2251 | bAig_ExpandTimeFrame(network, manager, bound+1, BMC_INITIAL_STATES); |
---|
| 2252 | |
---|
| 2253 | /* |
---|
| 2254 | A counterexample to a safety property is finite path at which the |
---|
| 2255 | safety property does not hold. |
---|
| 2256 | */ |
---|
| 2257 | noLoop = BmcCirCUsGenerateLogicForLtl(network, ltl, 0, bound, -1); |
---|
| 2258 | array_insert(bAigEdge_t, objArray, 0, noLoop); |
---|
| 2259 | |
---|
| 2260 | options->cnfPrefix = bound; |
---|
| 2261 | interface = BmcCirCUsInterfaceWithObjArr(manager, network, |
---|
| 2262 | objArray, |
---|
| 2263 | previousResultArray, |
---|
| 2264 | options, |
---|
| 2265 | interface); |
---|
| 2266 | satFlag = interface->status; |
---|
| 2267 | if(satFlag == SAT_SAT) { |
---|
| 2268 | formulaStatus = BmcPropertyFailed_c; |
---|
| 2269 | break; |
---|
| 2270 | } |
---|
| 2271 | array_insert_last(bAigEdge_t, previousResultArray, bAig_Not(noLoop)); |
---|
| 2272 | |
---|
| 2273 | /* |
---|
| 2274 | Use the termination check if the the LTL formula is not bounded |
---|
| 2275 | */ |
---|
| 2276 | if(!boundedFormula && |
---|
| 2277 | (options->inductiveStep !=0) && |
---|
| 2278 | (bound % options->inductiveStep == 0)) |
---|
| 2279 | { |
---|
| 2280 | terminationStatus->k = bound; |
---|
| 2281 | BmcCirCUsAutLtlCheckTerminalAutomaton(network, manager, |
---|
| 2282 | nodeToMvfAigTable, |
---|
| 2283 | terminationStatus, |
---|
| 2284 | coiIndexTable, options); |
---|
| 2285 | if(terminationStatus->action == 1){ |
---|
| 2286 | formulaStatus = BmcPropertyPassed_c; |
---|
| 2287 | maxK = bound; |
---|
| 2288 | break; |
---|
| 2289 | } |
---|
| 2290 | } |
---|
| 2291 | bound += options->step; |
---|
| 2292 | } |
---|
| 2293 | array_free(objArray); |
---|
| 2294 | array_free(previousResultArray); |
---|
| 2295 | sat_FreeInterface(interface); |
---|
| 2296 | |
---|
| 2297 | if ((formulaStatus != BmcPropertyFailed_c) && boundedFormula && depth <= options->maxK){ |
---|
| 2298 | /* |
---|
| 2299 | No counterexample of length up to the bounded depth of the LTL formula is |
---|
| 2300 | found. Formula passes |
---|
| 2301 | */ |
---|
| 2302 | formulaStatus = BmcPropertyPassed_c; |
---|
| 2303 | } |
---|
| 2304 | |
---|
| 2305 | if(options->satSolverError){ |
---|
| 2306 | (void) fprintf(vis_stdout,"# BMC: Error in calling SAT solver\n"); |
---|
| 2307 | } else { |
---|
| 2308 | if(formulaStatus == BmcPropertyFailed_c) { |
---|
| 2309 | (void) fprintf(vis_stdout, "# BMC: formula failed\n"); |
---|
| 2310 | if(options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 2311 | (void) fprintf(vis_stdout, |
---|
| 2312 | "# BMC: Found a counterexample of length = %d \n", bound); |
---|
| 2313 | } |
---|
| 2314 | if (options->dbgLevel == 1) { |
---|
| 2315 | BmcCirCUsPrintCounterExample(network, nodeToMvfAigTable, coiTable, bound, NIL(array_t), |
---|
| 2316 | options, BMC_INITIAL_STATES); |
---|
| 2317 | } |
---|
| 2318 | if (options->dbgLevel == 2) { |
---|
| 2319 | BmcCirCUsPrintCounterExampleAiger(network, nodeToMvfAigTable, coiTable, bound, NIL(array_t), |
---|
| 2320 | options, BMC_INITIAL_STATES); |
---|
| 2321 | } |
---|
| 2322 | } else if(formulaStatus == BmcPropertyPassed_c) { |
---|
| 2323 | (void) fprintf(vis_stdout, "# BMC: formula Passed\n"); |
---|
| 2324 | (void) fprintf(vis_stdout, "# Termination depth = %d\n", maxK); |
---|
| 2325 | } else if(formulaStatus == BmcPropertyUndecided_c) { |
---|
| 2326 | (void) fprintf(vis_stdout,"# BMC: formula undecided\n"); |
---|
| 2327 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 2328 | (void) fprintf(vis_stdout, |
---|
| 2329 | "# BMC: no counterexample found of length up to %d \n", |
---|
| 2330 | maxK); |
---|
| 2331 | } |
---|
| 2332 | } |
---|
| 2333 | } |
---|
| 2334 | |
---|
| 2335 | if (options->verbosityLevel != BmcVerbosityNone_c) { |
---|
| 2336 | endTime = util_cpu_ctime(); |
---|
| 2337 | fprintf(vis_stdout, "-- bmc time = %10g\n", (double)(endTime - startTime) / 1000.0); |
---|
| 2338 | } |
---|
| 2339 | fflush(vis_stdout); |
---|
| 2340 | return; |
---|
| 2341 | |
---|
| 2342 | } |
---|
| 2343 | |
---|
| 2344 | |
---|
| 2345 | /**Function******************************************************************** |
---|
| 2346 | |
---|
| 2347 | Synopsis [Build AIG for a transition from state "from" to state "to"] |
---|
| 2348 | |
---|
| 2349 | Description [The state next to "from" equal to "to". (from+1) == to] |
---|
| 2350 | |
---|
| 2351 | SideEffects [] |
---|
| 2352 | |
---|
| 2353 | SeeAlso [] |
---|
| 2354 | |
---|
| 2355 | ******************************************************************************/ |
---|
| 2356 | |
---|
| 2357 | bAigEdge_t |
---|
| 2358 | BmcCirCUsConnectFromStateToState( |
---|
| 2359 | Ntk_Network_t *network, |
---|
| 2360 | int from, |
---|
| 2361 | int to, |
---|
| 2362 | st_table *nodeToMvfAigTable, |
---|
| 2363 | st_table *coiIndexTable, |
---|
| 2364 | int withInitialState) |
---|
| 2365 | { |
---|
| 2366 | bAigEdge_t *fli, *tli; |
---|
| 2367 | bAigEdge_t loop, tv; |
---|
| 2368 | int l, index, nLatches; |
---|
| 2369 | bAigTimeFrame_t *timeframe; |
---|
| 2370 | mAig_Manager_t *manager = Ntk_NetworkReadMAigManager(network); |
---|
| 2371 | |
---|
| 2372 | if(withInitialState) timeframe = manager->timeframe; |
---|
| 2373 | else timeframe = manager->timeframeWOI; |
---|
| 2374 | |
---|
| 2375 | fli = timeframe->latchInputs[from+1]; |
---|
| 2376 | tli = timeframe->latchInputs[to]; |
---|
| 2377 | loop = bAig_One; |
---|
| 2378 | nLatches = timeframe->nLatches; |
---|
| 2379 | for(l=0; l<nLatches; l++) { |
---|
| 2380 | if(!st_lookup_int(coiIndexTable, (char *)(long)l, &index)) continue; |
---|
| 2381 | tv = bAig_Eq(manager, fli[l], tli[l]); |
---|
| 2382 | loop = bAig_And(manager, tv, loop); |
---|
| 2383 | if(loop == bAig_Zero) break; |
---|
| 2384 | } |
---|
| 2385 | return(loop); |
---|
| 2386 | } |
---|
| 2387 | |
---|
| 2388 | |
---|
| 2389 | /**Function******************************************************************** |
---|
| 2390 | |
---|
| 2391 | Synopsis [Create AIG graph for simple path constraint] |
---|
| 2392 | |
---|
| 2393 | Description [Create AIG graph that constrains a path starting from |
---|
| 2394 | 'fromState' and ending at 'toState' to be a simple path. A simple |
---|
| 2395 | path is a path such that every state in the path is distinct. i.e |
---|
| 2396 | for all states in the path Si != Sj for fromState <= i < j <= |
---|
| 2397 | toState.] |
---|
| 2398 | |
---|
| 2399 | SideEffects [] |
---|
| 2400 | |
---|
| 2401 | SeeAlso [] |
---|
| 2402 | |
---|
| 2403 | ******************************************************************************/ |
---|
| 2404 | bAigEdge_t |
---|
| 2405 | BmcCirCUsSimlePathConstraint( |
---|
| 2406 | Ntk_Network_t *network, |
---|
| 2407 | int fromState, |
---|
| 2408 | int toState, |
---|
| 2409 | st_table *nodeToMvfAigTable, |
---|
| 2410 | st_table *coiIndexTable, |
---|
| 2411 | int withInitialState) |
---|
| 2412 | { |
---|
| 2413 | int i, j; |
---|
| 2414 | bAigEdge_t loop, nLoop; |
---|
| 2415 | mAig_Manager_t *manager = Ntk_NetworkReadMAigManager(network); |
---|
| 2416 | |
---|
| 2417 | nLoop = bAig_One; |
---|
| 2418 | for(i=fromState+1; i<=toState; i++) { |
---|
| 2419 | for(j=fromState; j<i; j++) { |
---|
| 2420 | /* |
---|
| 2421 | We want state Si == Sj, but the following function returns |
---|
| 2422 | S(i+1) == Sj. So we call the function with i-1. |
---|
| 2423 | */ |
---|
| 2424 | loop = BmcCirCUsConnectFromStateToState( |
---|
| 2425 | network, i-1, j, nodeToMvfAigTable, coiIndexTable, withInitialState); |
---|
| 2426 | nLoop = bAig_And(manager, nLoop, bAig_Not(loop)); |
---|
| 2427 | } |
---|
| 2428 | } |
---|
| 2429 | return(nLoop); |
---|
| 2430 | } /* BmcCirCUsSimplePathConstraint */ |
---|
| 2431 | |
---|
| 2432 | |
---|
| 2433 | /**Function******************************************************************** |
---|
| 2434 | |
---|
| 2435 | Synopsis [Build an AIG graph for a simple path] |
---|
| 2436 | |
---|
| 2437 | Description [] |
---|
| 2438 | |
---|
| 2439 | SideEffects [] |
---|
| 2440 | |
---|
| 2441 | SeeAlso [] |
---|
| 2442 | |
---|
| 2443 | ******************************************************************************/ |
---|
| 2444 | |
---|
| 2445 | bAigEdge_t |
---|
| 2446 | BmcCirCUsGenerateSimplePath( |
---|
| 2447 | Ntk_Network_t *network, |
---|
| 2448 | int from, |
---|
| 2449 | int to, |
---|
| 2450 | st_table *nodeToMvfAigTable, |
---|
| 2451 | st_table *coiIndexTable, |
---|
| 2452 | int withInitialState) |
---|
| 2453 | { |
---|
| 2454 | int i, j; |
---|
| 2455 | bAigEdge_t loop, nloop; |
---|
| 2456 | mAig_Manager_t *manager; |
---|
| 2457 | |
---|
| 2458 | manager = Ntk_NetworkReadMAigManager(network); |
---|
| 2459 | |
---|
| 2460 | bAig_ExpandTimeFrame(network, manager, to, withInitialState); |
---|
| 2461 | |
---|
| 2462 | nloop = bAig_One; |
---|
| 2463 | for(i=from+1; i<=to; i++) { |
---|
| 2464 | for(j=from; j<i; j++) { |
---|
| 2465 | loop = BmcCirCUsConnectFromStateToState( |
---|
| 2466 | network, i-1, j, nodeToMvfAigTable, coiIndexTable, withInitialState); |
---|
| 2467 | nloop = bAig_And(manager, nloop, bAig_Not(loop)); |
---|
| 2468 | } |
---|
| 2469 | } |
---|
| 2470 | return(nloop); |
---|
| 2471 | } |
---|
| 2472 | |
---|
| 2473 | |
---|
| 2474 | /**Function******************************************************************** |
---|
| 2475 | |
---|
| 2476 | Synopsis [] |
---|
| 2477 | |
---|
| 2478 | Description [] |
---|
| 2479 | |
---|
| 2480 | SideEffects [] |
---|
| 2481 | |
---|
| 2482 | SeeAlso [] |
---|
| 2483 | |
---|
| 2484 | ******************************************************************************/ |
---|
| 2485 | |
---|
| 2486 | void |
---|
| 2487 | BmcCirCUsPrintCounterExample( |
---|
| 2488 | Ntk_Network_t *network, |
---|
| 2489 | st_table *nodeToMvfAigTable, |
---|
| 2490 | st_table *coiTable, |
---|
| 2491 | int length, |
---|
| 2492 | array_t *loop_arr, |
---|
| 2493 | BmcOption_t *options, |
---|
| 2494 | int withInitialState) |
---|
| 2495 | { |
---|
| 2496 | int *prevLatchValues, *prevInputValues; |
---|
| 2497 | mAig_Manager_t *manager = Ntk_NetworkReadMAigManager(network); |
---|
| 2498 | int loop, k; |
---|
| 2499 | unsigned int lvalue; |
---|
| 2500 | bAigEdge_t v; |
---|
| 2501 | array_t *latchArr; |
---|
| 2502 | lsGen gen; |
---|
| 2503 | Ntk_Node_t *node; |
---|
| 2504 | int tmp; |
---|
| 2505 | bAigTimeFrame_t *timeframe; |
---|
| 2506 | FILE *dbgOut = NULL; |
---|
| 2507 | |
---|
| 2508 | latchArr = array_alloc(Ntk_Node_t *, 0); |
---|
| 2509 | Ntk_NetworkForEachLatch(network, gen, node){ |
---|
| 2510 | if (st_lookup_int(coiTable, (char *) node, &tmp)){ |
---|
| 2511 | array_insert_last(Ntk_Node_t *, latchArr, node); |
---|
| 2512 | } |
---|
| 2513 | } |
---|
| 2514 | |
---|
| 2515 | if(options->dbgOut) |
---|
| 2516 | { |
---|
| 2517 | dbgOut = vis_stdout; |
---|
| 2518 | vis_stdout = options->dbgOut; |
---|
| 2519 | } |
---|
| 2520 | |
---|
| 2521 | /** check index such as, k, length, loop */ |
---|
| 2522 | |
---|
| 2523 | if(withInitialState) timeframe = manager->timeframe; |
---|
| 2524 | else timeframe = manager->timeframeWOI; |
---|
| 2525 | |
---|
| 2526 | prevLatchValues = ALLOC(int, timeframe->nLatches); |
---|
| 2527 | prevInputValues = ALLOC(int, timeframe->nInputs); |
---|
| 2528 | |
---|
| 2529 | loop = -1; |
---|
| 2530 | if(loop_arr != 0) { |
---|
| 2531 | for(k=array_n(loop_arr)-1; k>=0; k--) { |
---|
| 2532 | v = array_fetch(bAigEdge_t, loop_arr, k); |
---|
| 2533 | lvalue = aig_value(v); |
---|
| 2534 | if(lvalue == 1) { |
---|
| 2535 | loop = k; |
---|
| 2536 | break; |
---|
| 2537 | } |
---|
| 2538 | } |
---|
| 2539 | } |
---|
| 2540 | for(k=0; k<=length; k++) { |
---|
| 2541 | if(k == 0) fprintf(vis_stdout, "\n--State %d:\n", k); |
---|
| 2542 | else fprintf(vis_stdout, "\n--Goes to state %d:\n", k); |
---|
| 2543 | |
---|
| 2544 | printSatValue(manager, nodeToMvfAigTable, |
---|
| 2545 | timeframe->li2index, |
---|
| 2546 | timeframe->latchInputs, latchArr, |
---|
| 2547 | k, prevLatchValues); |
---|
| 2548 | |
---|
| 2549 | if(options->printInputs == TRUE && k!=0) { |
---|
| 2550 | fprintf(vis_stdout, "--On input:\n"); |
---|
| 2551 | printSatValue(manager, nodeToMvfAigTable, |
---|
| 2552 | timeframe->pi2index, |
---|
| 2553 | timeframe->inputs, timeframe->inputArr, |
---|
| 2554 | k-1, prevInputValues); |
---|
| 2555 | } |
---|
| 2556 | } |
---|
| 2557 | |
---|
| 2558 | if(loop >=0) { |
---|
| 2559 | fprintf(vis_stdout, "\n--Goes back to state %d:\n", loop); |
---|
| 2560 | |
---|
| 2561 | printSatValue(manager, nodeToMvfAigTable, |
---|
| 2562 | timeframe->li2index, |
---|
| 2563 | timeframe->latchInputs, latchArr, |
---|
| 2564 | loop, prevLatchValues); |
---|
| 2565 | |
---|
| 2566 | if(options->printInputs == TRUE && k!=0) { |
---|
| 2567 | fprintf(vis_stdout, "--On input:\n"); |
---|
| 2568 | printSatValue(manager, nodeToMvfAigTable, |
---|
| 2569 | timeframe->pi2index, |
---|
| 2570 | timeframe->inputs, timeframe->inputArr, |
---|
| 2571 | length, prevInputValues); |
---|
| 2572 | } |
---|
| 2573 | } |
---|
| 2574 | |
---|
| 2575 | array_free(latchArr); |
---|
| 2576 | if(options->dbgOut) |
---|
| 2577 | { |
---|
| 2578 | vis_stdout = dbgOut; |
---|
| 2579 | } |
---|
| 2580 | return; |
---|
| 2581 | } |
---|
| 2582 | |
---|
| 2583 | |
---|
| 2584 | |
---|
| 2585 | /**Function******************************************************************** |
---|
| 2586 | |
---|
| 2587 | Synopsis [Prints the counter-example in Aiger format.] |
---|
| 2588 | |
---|
| 2589 | Description [The Aiger format is as follows, |
---|
| 2590 | currentState, input, output, nextState |
---|
| 2591 | the names of the variables aren't printed rather their values |
---|
| 2592 | are only printed, -i option is set by default.] |
---|
| 2593 | |
---|
| 2594 | SideEffects [] |
---|
| 2595 | |
---|
| 2596 | SeeAlso [] |
---|
| 2597 | |
---|
| 2598 | ******************************************************************************/ |
---|
| 2599 | |
---|
| 2600 | void |
---|
| 2601 | BmcCirCUsPrintCounterExampleAiger( |
---|
| 2602 | Ntk_Network_t *network, |
---|
| 2603 | st_table *nodeToMvfAigTable, |
---|
| 2604 | st_table *coiTable, |
---|
| 2605 | int length, |
---|
| 2606 | array_t *loop_arr, |
---|
| 2607 | BmcOption_t *options, |
---|
| 2608 | int withInitialState) |
---|
| 2609 | { |
---|
| 2610 | int *prevLatchValues, *prevInputValues; |
---|
| 2611 | mAig_Manager_t *manager = Ntk_NetworkReadMAigManager(network); |
---|
| 2612 | int loop, k; |
---|
| 2613 | unsigned int lvalue; |
---|
| 2614 | bAigEdge_t v; |
---|
| 2615 | array_t *latchArr; |
---|
| 2616 | lsGen gen; |
---|
| 2617 | Ntk_Node_t *node; |
---|
| 2618 | int tmp; |
---|
| 2619 | bAigTimeFrame_t *timeframe; |
---|
| 2620 | FILE *dbgOut = NULL; |
---|
| 2621 | |
---|
| 2622 | latchArr = array_alloc(Ntk_Node_t *, 0); |
---|
| 2623 | Ntk_NetworkForEachLatch(network, gen, node){ |
---|
| 2624 | if (st_lookup_int(coiTable, (char *) node, &tmp)){ |
---|
| 2625 | array_insert_last(Ntk_Node_t *, latchArr, node); |
---|
| 2626 | } |
---|
| 2627 | } |
---|
| 2628 | |
---|
| 2629 | /* writing into a file is not being done in a standard way, need to confirm |
---|
| 2630 | the writing of trace into a file with the vis standard */ |
---|
| 2631 | |
---|
| 2632 | if(options->dbgOut) |
---|
| 2633 | { |
---|
| 2634 | dbgOut = vis_stdout; |
---|
| 2635 | vis_stdout = options->dbgOut; |
---|
| 2636 | } |
---|
| 2637 | |
---|
| 2638 | /** check index such as, k, length, loop */ |
---|
| 2639 | |
---|
| 2640 | if(withInitialState) timeframe = manager->timeframe; |
---|
| 2641 | else timeframe = manager->timeframeWOI; |
---|
| 2642 | |
---|
| 2643 | prevLatchValues = ALLOC(int, timeframe->nLatches); |
---|
| 2644 | prevInputValues = ALLOC(int, timeframe->nInputs); |
---|
| 2645 | |
---|
| 2646 | loop = -1; |
---|
| 2647 | if(loop_arr != 0) { |
---|
| 2648 | for(k=array_n(loop_arr)-1; k>=0; k--) { |
---|
| 2649 | v = array_fetch(bAigEdge_t, loop_arr, k); |
---|
| 2650 | lvalue = aig_value(v); |
---|
| 2651 | if(lvalue == 1) { |
---|
| 2652 | loop = k; |
---|
| 2653 | break; |
---|
| 2654 | } |
---|
| 2655 | } |
---|
| 2656 | } |
---|
| 2657 | |
---|
| 2658 | /* we need to get rid of the file generation for next vis release and look |
---|
| 2659 | into ntk package so that the original order can be maintained */ |
---|
| 2660 | |
---|
| 2661 | FILE *order = Cmd_FileOpen("inputOrder.txt", "w", NIL(char *), 0) ; |
---|
| 2662 | for(k=0; k<array_n(timeframe->inputArr); k++) |
---|
| 2663 | { |
---|
| 2664 | node = array_fetch(Ntk_Node_t *, timeframe->inputArr, k); |
---|
| 2665 | fprintf(order, "%s\n", Ntk_NodeReadName(node)); |
---|
| 2666 | } |
---|
| 2667 | fclose(order); |
---|
| 2668 | |
---|
| 2669 | for(k=0; k<=length; k++) { |
---|
| 2670 | /*if(k == 0) fprintf(vis_stdout, "\n--State %d:\n", k); |
---|
| 2671 | else fprintf(vis_stdout, "\n--Goes to state %d:\n", k);*/ |
---|
| 2672 | |
---|
| 2673 | /*if((loop>=0)||(k<length)) |
---|
| 2674 | { */ |
---|
| 2675 | printSatValueAiger(manager, nodeToMvfAigTable, |
---|
| 2676 | timeframe->li2index, |
---|
| 2677 | timeframe->latchInputs, latchArr, |
---|
| 2678 | k, prevLatchValues); |
---|
| 2679 | fprintf(vis_stdout, " "); |
---|
| 2680 | |
---|
| 2681 | if((loop<0)||(k<length)) |
---|
| 2682 | { |
---|
| 2683 | if(k!=length+1) { |
---|
| 2684 | printSatValueAiger(manager, nodeToMvfAigTable, |
---|
| 2685 | timeframe->pi2index, |
---|
| 2686 | timeframe->inputs, timeframe->inputArr, |
---|
| 2687 | k, prevInputValues); |
---|
| 2688 | fprintf(vis_stdout, " "); |
---|
| 2689 | } |
---|
| 2690 | |
---|
| 2691 | if(k!=length+1) { |
---|
| 2692 | printSatValueAiger(manager, nodeToMvfAigTable, |
---|
| 2693 | timeframe->o2index, |
---|
| 2694 | timeframe->outputs, timeframe->outputArr, |
---|
| 2695 | k, prevInputValues); |
---|
| 2696 | fprintf(vis_stdout, " "); |
---|
| 2697 | } |
---|
| 2698 | |
---|
| 2699 | if(k!=length+1) { |
---|
| 2700 | printSatValueAiger(manager, nodeToMvfAigTable, |
---|
| 2701 | timeframe->li2index, |
---|
| 2702 | timeframe->latchInputs, latchArr, |
---|
| 2703 | k+1, prevLatchValues); |
---|
| 2704 | fprintf(vis_stdout, " "); |
---|
| 2705 | } |
---|
| 2706 | if((loop < 0)||(k!=length)) |
---|
| 2707 | { |
---|
| 2708 | fprintf(vis_stdout, "\n"); |
---|
| 2709 | } |
---|
| 2710 | } |
---|
| 2711 | } |
---|
| 2712 | |
---|
| 2713 | if(loop >=0) { |
---|
| 2714 | /*fprintf(vis_stdout, "\n--Goes back to state %d:\n", loop);*/ |
---|
| 2715 | |
---|
| 2716 | if(k!=0) { |
---|
| 2717 | printSatValueAiger(manager, nodeToMvfAigTable, |
---|
| 2718 | timeframe->pi2index, |
---|
| 2719 | timeframe->inputs, timeframe->inputArr, |
---|
| 2720 | length, prevInputValues); |
---|
| 2721 | fprintf(vis_stdout, " "); |
---|
| 2722 | } |
---|
| 2723 | |
---|
| 2724 | printSatValueAiger(manager, nodeToMvfAigTable, |
---|
| 2725 | timeframe->o2index, |
---|
| 2726 | timeframe->outputs, timeframe->outputArr, |
---|
| 2727 | k, prevInputValues); |
---|
| 2728 | fprintf(vis_stdout, " "); |
---|
| 2729 | |
---|
| 2730 | printSatValueAiger(manager, nodeToMvfAigTable, |
---|
| 2731 | timeframe->li2index, |
---|
| 2732 | timeframe->latchInputs, latchArr, |
---|
| 2733 | loop, prevLatchValues); |
---|
| 2734 | |
---|
| 2735 | fprintf(vis_stdout, "\n"); |
---|
| 2736 | } |
---|
| 2737 | |
---|
| 2738 | array_free(latchArr); |
---|
| 2739 | if(options->dbgOut) |
---|
| 2740 | { |
---|
| 2741 | vis_stdout = dbgOut; |
---|
| 2742 | } |
---|
| 2743 | return; |
---|
| 2744 | } /* BmcCirCUsPrintCounterExampleAiger */ |
---|
| 2745 | |
---|
| 2746 | /**Function******************************************************************** |
---|
| 2747 | |
---|
| 2748 | Synopsis [] |
---|
| 2749 | |
---|
| 2750 | Description [] |
---|
| 2751 | |
---|
| 2752 | SideEffects [] |
---|
| 2753 | |
---|
| 2754 | SeeAlso [] |
---|
| 2755 | |
---|
| 2756 | ******************************************************************************/ |
---|
| 2757 | |
---|
| 2758 | |
---|
| 2759 | static int |
---|
| 2760 | printSatValue( |
---|
| 2761 | bAig_Manager_t *manager, |
---|
| 2762 | st_table *nodeToMvfAigTable, |
---|
| 2763 | st_table *li2index, |
---|
| 2764 | bAigEdge_t **baigArr, |
---|
| 2765 | array_t *nodeArr, |
---|
| 2766 | int bound, |
---|
| 2767 | int *prevValue) |
---|
| 2768 | { |
---|
| 2769 | Ntk_Node_t * node; |
---|
| 2770 | int value, lvalue; |
---|
| 2771 | char *symbolicValue; |
---|
| 2772 | bAigEdge_t *li, v, tv; |
---|
| 2773 | int i, j, timeframe, index; |
---|
| 2774 | int changed=0; |
---|
| 2775 | MvfAig_Function_t *mvfAig; |
---|
| 2776 | |
---|
| 2777 | timeframe = bound; |
---|
| 2778 | li = baigArr[timeframe]; |
---|
| 2779 | for(i=0; i<array_n(nodeArr); i++) { |
---|
| 2780 | if(timeframe == 0) prevValue[i] = -1; |
---|
| 2781 | node = array_fetch(Ntk_Node_t *, nodeArr, i); |
---|
| 2782 | mvfAig = Bmc_ReadMvfAig(node, nodeToMvfAigTable); |
---|
| 2783 | |
---|
| 2784 | if(mvfAig == 0) continue; |
---|
| 2785 | |
---|
| 2786 | value = -1; |
---|
| 2787 | for (j=0; j< array_n(mvfAig); j++) { |
---|
| 2788 | v = MvfAig_FunctionReadComponent(mvfAig, j); |
---|
| 2789 | index = -1; |
---|
| 2790 | if(!st_lookup_int(li2index, (char *)v, &index)) { |
---|
| 2791 | fprintf(vis_stdout, "printSatValueERROR \n"); |
---|
| 2792 | } |
---|
| 2793 | v = li[index]; |
---|
| 2794 | if(v == bAig_One) { |
---|
| 2795 | value = j; |
---|
| 2796 | break; |
---|
| 2797 | } |
---|
| 2798 | |
---|
| 2799 | if(v != bAig_Zero) { |
---|
| 2800 | tv = bAig_GetCanonical(manager, v); |
---|
| 2801 | lvalue = bAig_GetValueOfNode(manager, tv); |
---|
| 2802 | if(lvalue == 1){ |
---|
| 2803 | value = j; |
---|
| 2804 | break; |
---|
| 2805 | } |
---|
| 2806 | } |
---|
| 2807 | } |
---|
| 2808 | if(value >=0) { |
---|
| 2809 | if (value != prevValue[i]){ |
---|
| 2810 | Var_Variable_t *nodeVar = Ntk_NodeReadVariable(node); |
---|
| 2811 | prevValue[i] = value; |
---|
| 2812 | changed = 1; |
---|
| 2813 | if (Var_VariableTestIsSymbolic(nodeVar)) { |
---|
| 2814 | symbolicValue = Var_VariableReadSymbolicValueFromIndex(nodeVar, value); |
---|
| 2815 | fprintf(vis_stdout,"%s:%s\n", Ntk_NodeReadName(node), symbolicValue); |
---|
| 2816 | } |
---|
| 2817 | else { |
---|
| 2818 | fprintf(vis_stdout,"%s:%d\n", Ntk_NodeReadName(node), value); |
---|
| 2819 | } |
---|
| 2820 | } |
---|
| 2821 | } |
---|
| 2822 | } /* for j loop */ |
---|
| 2823 | if (changed == 0){ |
---|
| 2824 | fprintf(vis_stdout, "<Unchanged>\n"); |
---|
| 2825 | } |
---|
| 2826 | return 0; |
---|
| 2827 | } |
---|
| 2828 | |
---|
| 2829 | /**Function******************************************************************** |
---|
| 2830 | |
---|
| 2831 | Synopsis [Prints the counter-example in the Aiger Format.] |
---|
| 2832 | |
---|
| 2833 | Description [] |
---|
| 2834 | |
---|
| 2835 | SideEffects [] |
---|
| 2836 | |
---|
| 2837 | SeeAlso [BmcCirCUsPrintCounterExampleAiger] |
---|
| 2838 | |
---|
| 2839 | ******************************************************************************/ |
---|
| 2840 | |
---|
| 2841 | static int |
---|
| 2842 | printSatValueAiger( |
---|
| 2843 | bAig_Manager_t *manager, |
---|
| 2844 | st_table *nodeToMvfAigTable, |
---|
| 2845 | st_table *li2index, |
---|
| 2846 | bAigEdge_t **baigArr, |
---|
| 2847 | array_t *nodeArr, |
---|
| 2848 | int bound, |
---|
| 2849 | int *prevValue) |
---|
| 2850 | { |
---|
| 2851 | Ntk_Node_t * node; |
---|
| 2852 | int value, lvalue; |
---|
| 2853 | char *symbolicValue; |
---|
| 2854 | bAigEdge_t *li, v, tv; |
---|
| 2855 | int i, j, timeframe, index; |
---|
| 2856 | MvfAig_Function_t *mvfAig; |
---|
| 2857 | |
---|
| 2858 | timeframe = bound; |
---|
| 2859 | li = baigArr[timeframe]; |
---|
| 2860 | for(i=0; i<array_n(nodeArr); i++) { |
---|
| 2861 | if(timeframe == 0) prevValue[i] = -1; |
---|
| 2862 | node = array_fetch(Ntk_Node_t *, nodeArr, i); |
---|
| 2863 | mvfAig = Bmc_ReadMvfAig(node, nodeToMvfAigTable); |
---|
| 2864 | |
---|
| 2865 | if(mvfAig == 0) continue; |
---|
| 2866 | |
---|
| 2867 | value = -1; |
---|
| 2868 | for (j=0; j< array_n(mvfAig); j++) { |
---|
| 2869 | v = MvfAig_FunctionReadComponent(mvfAig, j); |
---|
| 2870 | index = -1; |
---|
| 2871 | if(!st_lookup_int(li2index, (char *)v, &index)) { |
---|
| 2872 | fprintf(vis_stdout, "printSatValueERROR \n"); |
---|
| 2873 | } |
---|
| 2874 | v = li[index]; |
---|
| 2875 | if(v == bAig_One) { |
---|
| 2876 | value = j; |
---|
| 2877 | break; |
---|
| 2878 | } |
---|
| 2879 | |
---|
| 2880 | if(v != bAig_Zero) { |
---|
| 2881 | tv = bAig_GetCanonical(manager, v); |
---|
| 2882 | lvalue = bAig_GetValueOfNode(manager, tv); |
---|
| 2883 | if(lvalue == 1){ |
---|
| 2884 | value = j; |
---|
| 2885 | break; |
---|
| 2886 | } |
---|
| 2887 | } |
---|
| 2888 | } |
---|
| 2889 | if(value >=0) { |
---|
| 2890 | Var_Variable_t *nodeVar = Ntk_NodeReadVariable(node); |
---|
| 2891 | prevValue[i] = value; |
---|
| 2892 | if (Var_VariableTestIsSymbolic(nodeVar)) { |
---|
| 2893 | symbolicValue = Var_VariableReadSymbolicValueFromIndex(nodeVar, value); |
---|
| 2894 | fprintf(vis_stdout,"%s", symbolicValue); |
---|
| 2895 | } |
---|
| 2896 | else { |
---|
| 2897 | fprintf(vis_stdout,"%d", value); |
---|
| 2898 | } |
---|
| 2899 | } |
---|
| 2900 | else |
---|
| 2901 | { |
---|
| 2902 | fprintf(vis_stdout,"x"); |
---|
| 2903 | } |
---|
| 2904 | } /* for j loop */ |
---|
| 2905 | return 0; |
---|
| 2906 | } /* printSatValueAiger */ |
---|
| 2907 | |
---|
| 2908 | /**Function******************************************************************** |
---|
| 2909 | |
---|
| 2910 | Synopsis [Builds AND/INVERTER graph (aig) for a propsitional formula |
---|
| 2911 | at time frame bound] |
---|
| 2912 | |
---|
| 2913 | Description [Builds AND/INVERTER graph for a propsitional formula at |
---|
| 2914 | time frame bound. Returns bAig ID of the function that is quivalent |
---|
| 2915 | to the propositional fomula] |
---|
| 2916 | |
---|
| 2917 | SideEffects [] |
---|
| 2918 | |
---|
| 2919 | SeeAlso [] |
---|
| 2920 | |
---|
| 2921 | ******************************************************************************/ |
---|
| 2922 | bAigEdge_t |
---|
| 2923 | BmcCirCUsCreatebAigOfPropFormula( |
---|
| 2924 | Ntk_Network_t *network, |
---|
| 2925 | bAig_Manager_t *manager, |
---|
| 2926 | int bound, |
---|
| 2927 | Ctlsp_Formula_t *ltl, |
---|
| 2928 | int withInitialState) |
---|
| 2929 | { |
---|
| 2930 | int index; |
---|
| 2931 | bAigEdge_t result, left, right, *li; |
---|
| 2932 | bAigTimeFrame_t *timeframe; |
---|
| 2933 | |
---|
| 2934 | if (ltl == NIL(Ctlsp_Formula_t)) return mAig_NULL; |
---|
| 2935 | if (ltl->type == Ctlsp_TRUE_c) return mAig_One; |
---|
| 2936 | if (ltl->type == Ctlsp_FALSE_c) return mAig_Zero; |
---|
| 2937 | |
---|
| 2938 | assert(Ctlsp_isPropositionalFormula(ltl)); |
---|
| 2939 | |
---|
| 2940 | if(withInitialState) timeframe = manager->timeframe; |
---|
| 2941 | else timeframe = manager->timeframeWOI; |
---|
| 2942 | |
---|
| 2943 | if (ltl->type == Ctlsp_ID_c){ |
---|
| 2944 | char *nodeNameString = Ctlsp_FormulaReadVariableName(ltl); |
---|
| 2945 | char *nodeValueString = Ctlsp_FormulaReadValueName(ltl); |
---|
| 2946 | Ntk_Node_t *node = Ntk_NetworkFindNodeByName(network, nodeNameString); |
---|
| 2947 | |
---|
| 2948 | Var_Variable_t *nodeVar; |
---|
| 2949 | int nodeValue; |
---|
| 2950 | |
---|
| 2951 | MvfAig_Function_t *tmpMvfAig; |
---|
| 2952 | st_table *nodeToMvfAigTable; /* maps each node to its mvfAig */ |
---|
| 2953 | |
---|
| 2954 | if (node == NIL(Ntk_Node_t)) { |
---|
| 2955 | char *nameKey; |
---|
| 2956 | char tmpName[100]; |
---|
| 2957 | |
---|
| 2958 | sprintf(tmpName, "%s_%d", nodeNameString, bound); |
---|
| 2959 | nameKey = util_strsav(tmpName); |
---|
| 2960 | |
---|
| 2961 | result = bAig_FindNodeByName(manager, nameKey); |
---|
| 2962 | if(result == bAig_NULL){ |
---|
| 2963 | result = bAig_CreateVarNode(manager, nameKey); |
---|
| 2964 | } else { |
---|
| 2965 | |
---|
| 2966 | FREE(nameKey); |
---|
| 2967 | } |
---|
| 2968 | |
---|
| 2969 | |
---|
| 2970 | return result; |
---|
| 2971 | } |
---|
| 2972 | |
---|
| 2973 | nodeToMvfAigTable = (st_table *) Ntk_NetworkReadApplInfo(network, MVFAIG_NETWORK_APPL_KEY); |
---|
| 2974 | assert(nodeToMvfAigTable != NIL(st_table)); |
---|
| 2975 | |
---|
| 2976 | tmpMvfAig = Bmc_ReadMvfAig(node, nodeToMvfAigTable); |
---|
| 2977 | if (tmpMvfAig == NIL(MvfAig_Function_t)){ |
---|
| 2978 | tmpMvfAig = Bmc_NodeBuildMVF(network, node); |
---|
| 2979 | array_free(tmpMvfAig); |
---|
| 2980 | tmpMvfAig = Bmc_ReadMvfAig(node, nodeToMvfAigTable); |
---|
| 2981 | } |
---|
| 2982 | |
---|
| 2983 | nodeVar = Ntk_NodeReadVariable(node); |
---|
| 2984 | if (Var_VariableTestIsSymbolic(nodeVar)) { |
---|
| 2985 | nodeValue = Var_VariableReadIndexFromSymbolicValue(nodeVar, nodeValueString); |
---|
| 2986 | if ( nodeValue == -1 ) { |
---|
| 2987 | (void) fprintf(vis_stderr, "Value specified in RHS is not in domain of variable\n"); |
---|
| 2988 | (void) fprintf(vis_stderr,"%s = %s\n", nodeNameString, nodeValueString); |
---|
| 2989 | return mAig_NULL; |
---|
| 2990 | } |
---|
| 2991 | } |
---|
| 2992 | else { |
---|
| 2993 | int check; |
---|
| 2994 | check = StringCheckIsInteger(nodeValueString, &nodeValue); |
---|
| 2995 | if( check == 0 ) { |
---|
| 2996 | (void) fprintf(vis_stderr,"Illegal value in the RHS\n"); |
---|
| 2997 | (void) fprintf(vis_stderr,"%s = %s\n", nodeNameString, nodeValueString); |
---|
| 2998 | return mAig_NULL; |
---|
| 2999 | } |
---|
| 3000 | if( check == 1 ) { |
---|
| 3001 | (void) fprintf(vis_stderr,"Value in the RHS is out of range of int\n"); |
---|
| 3002 | (void) fprintf(vis_stderr,"%s = %s", nodeNameString, nodeValueString); |
---|
| 3003 | return mAig_NULL; |
---|
| 3004 | } |
---|
| 3005 | if ( !(Var_VariableTestIsValueInRange(nodeVar, nodeValue))) { |
---|
| 3006 | (void) fprintf(vis_stderr,"Value specified in RHS is not in domain of variable\n"); |
---|
| 3007 | (void) fprintf(vis_stderr,"%s = %s\n", nodeNameString, nodeValueString); |
---|
| 3008 | return mAig_NULL; |
---|
| 3009 | |
---|
| 3010 | } |
---|
| 3011 | } |
---|
| 3012 | result = MvfAig_FunctionReadComponent(tmpMvfAig, nodeValue); |
---|
| 3013 | result = bAig_GetCanonical(manager, result); |
---|
| 3014 | if(st_lookup_int(timeframe->li2index, (char *)result, &index)) { |
---|
| 3015 | li = timeframe->latchInputs[bound]; |
---|
| 3016 | result = bAig_GetCanonical(manager, li[index]); |
---|
| 3017 | } |
---|
| 3018 | else if(st_lookup_int(timeframe->o2index, (char *)result, &index)) { |
---|
| 3019 | li = timeframe->outputs[bound]; |
---|
| 3020 | result = bAig_GetCanonical(manager, li[index]); |
---|
| 3021 | } |
---|
| 3022 | else if(st_lookup_int(timeframe->i2index, (char *)result, &index)) { |
---|
| 3023 | li = timeframe->internals[bound]; |
---|
| 3024 | result = bAig_GetCanonical(manager, li[index]); |
---|
| 3025 | } |
---|
| 3026 | return result; |
---|
| 3027 | } |
---|
| 3028 | |
---|
| 3029 | left = BmcCirCUsCreatebAigOfPropFormula(network, manager, bound, ltl->left, withInitialState); |
---|
| 3030 | if (left == mAig_NULL){ |
---|
| 3031 | return mAig_NULL; |
---|
| 3032 | } |
---|
| 3033 | right = BmcCirCUsCreatebAigOfPropFormula(network, manager, bound, ltl->right, withInitialState); |
---|
| 3034 | if (right == mAig_NULL && ltl->type ==Ctlsp_NOT_c ){ |
---|
| 3035 | return mAig_Not(left); |
---|
| 3036 | } |
---|
| 3037 | else if(right == mAig_NULL) { |
---|
| 3038 | return mAig_NULL; |
---|
| 3039 | } |
---|
| 3040 | |
---|
| 3041 | switch(ltl->type) { |
---|
| 3042 | /** |
---|
| 3043 | case Ctlsp_NOT_c: |
---|
| 3044 | result = mAig_Not(left); |
---|
| 3045 | break; |
---|
| 3046 | **/ |
---|
| 3047 | case Ctlsp_OR_c: |
---|
| 3048 | result = mAig_Or(manager, left, right); |
---|
| 3049 | break; |
---|
| 3050 | case Ctlsp_AND_c: |
---|
| 3051 | result = mAig_And(manager, left, right); |
---|
| 3052 | break; |
---|
| 3053 | case Ctlsp_THEN_c: |
---|
| 3054 | result = mAig_Then(manager, left, right); |
---|
| 3055 | break; |
---|
| 3056 | case Ctlsp_EQ_c: |
---|
| 3057 | result = mAig_Eq(manager, left, right); |
---|
| 3058 | break; |
---|
| 3059 | case Ctlsp_XOR_c: |
---|
| 3060 | result = mAig_Xor(manager, left, right); |
---|
| 3061 | break; |
---|
| 3062 | default: |
---|
| 3063 | fail("Unexpected type"); |
---|
| 3064 | } |
---|
| 3065 | return result; |
---|
| 3066 | } /* BmcCirCUsCreatebAigOfPropFormula */ |
---|
| 3067 | |
---|
| 3068 | /**Function******************************************************************** |
---|
| 3069 | |
---|
| 3070 | Synopsis [Builds AND/INVERTER graph (aig) for a propsitional formula] |
---|
| 3071 | |
---|
| 3072 | Description [Builds AND/INVERTER graph for a propsitional formula. |
---|
| 3073 | Returns bAig ID of the function that is quivalent to the propositional |
---|
| 3074 | fomula] |
---|
| 3075 | |
---|
| 3076 | SideEffects [] |
---|
| 3077 | |
---|
| 3078 | SeeAlso [] |
---|
| 3079 | |
---|
| 3080 | ******************************************************************************/ |
---|
| 3081 | |
---|
| 3082 | bAigEdge_t |
---|
| 3083 | BmcCirCUsCreatebAigOfPropFormulaOriginal( |
---|
| 3084 | Ntk_Network_t *network, |
---|
| 3085 | bAig_Manager_t *manager, |
---|
| 3086 | Ctlsp_Formula_t *ltl |
---|
| 3087 | ) |
---|
| 3088 | { |
---|
| 3089 | bAigEdge_t result, left, right; |
---|
| 3090 | |
---|
| 3091 | if (ltl == NIL(Ctlsp_Formula_t)) return mAig_NULL; |
---|
| 3092 | if (ltl->type == Ctlsp_TRUE_c) return mAig_One; |
---|
| 3093 | if (ltl->type == Ctlsp_FALSE_c) return mAig_Zero; |
---|
| 3094 | |
---|
| 3095 | assert(Ctlsp_isPropositionalFormula(ltl)); |
---|
| 3096 | |
---|
| 3097 | if (ltl->type == Ctlsp_ID_c){ |
---|
| 3098 | char *nodeNameString = Ctlsp_FormulaReadVariableName(ltl); |
---|
| 3099 | char *nodeValueString = Ctlsp_FormulaReadValueName(ltl); |
---|
| 3100 | Ntk_Node_t *node = Ntk_NetworkFindNodeByName(network, nodeNameString); |
---|
| 3101 | |
---|
| 3102 | Var_Variable_t *nodeVar; |
---|
| 3103 | int nodeValue; |
---|
| 3104 | |
---|
| 3105 | MvfAig_Function_t *tmpMvfAig; |
---|
| 3106 | st_table *nodeToMvfAigTable; /* maps each node to its mvfAig */ |
---|
| 3107 | |
---|
| 3108 | if (node == NIL(Ntk_Node_t)) { |
---|
| 3109 | (void) fprintf(vis_stderr, "bmc error: Could not find node corresponding to the name\t %s\n", nodeNameString); |
---|
| 3110 | return mAig_NULL; |
---|
| 3111 | } |
---|
| 3112 | |
---|
| 3113 | nodeToMvfAigTable = (st_table *) Ntk_NetworkReadApplInfo(network, MVFAIG_NETWORK_APPL_KEY); |
---|
| 3114 | if (nodeToMvfAigTable == NIL(st_table)){ |
---|
| 3115 | (void) fprintf(vis_stderr, "bmc error: please run build_partiton_maigs first"); |
---|
| 3116 | return mAig_NULL; |
---|
| 3117 | } |
---|
| 3118 | tmpMvfAig = Bmc_ReadMvfAig(node, nodeToMvfAigTable); |
---|
| 3119 | if (tmpMvfAig == NIL(MvfAig_Function_t)){ |
---|
| 3120 | tmpMvfAig = Bmc_NodeBuildMVF(network, node); |
---|
| 3121 | array_free(tmpMvfAig); |
---|
| 3122 | tmpMvfAig = Bmc_ReadMvfAig(node, nodeToMvfAigTable); |
---|
| 3123 | } |
---|
| 3124 | |
---|
| 3125 | nodeVar = Ntk_NodeReadVariable(node); |
---|
| 3126 | if (Var_VariableTestIsSymbolic(nodeVar)) { |
---|
| 3127 | nodeValue = Var_VariableReadIndexFromSymbolicValue(nodeVar, nodeValueString); |
---|
| 3128 | if ( nodeValue == -1 ) { |
---|
| 3129 | (void) fprintf(vis_stderr, "Value specified in RHS is not in domain of variable\n"); |
---|
| 3130 | (void) fprintf(vis_stderr,"%s = %s\n", nodeNameString, nodeValueString); |
---|
| 3131 | return mAig_NULL; |
---|
| 3132 | } |
---|
| 3133 | } |
---|
| 3134 | else { |
---|
| 3135 | int check; |
---|
| 3136 | check = StringCheckIsInteger(nodeValueString, &nodeValue); |
---|
| 3137 | if( check == 0 ) { |
---|
| 3138 | (void) fprintf(vis_stderr,"Illegal value in the RHS\n"); |
---|
| 3139 | (void) fprintf(vis_stderr,"%s = %s\n", nodeNameString, nodeValueString); |
---|
| 3140 | return mAig_NULL; |
---|
| 3141 | } |
---|
| 3142 | if( check == 1 ) { |
---|
| 3143 | (void) fprintf(vis_stderr,"Value in the RHS is out of range of int\n"); |
---|
| 3144 | (void) fprintf(vis_stderr,"%s = %s", nodeNameString, nodeValueString); |
---|
| 3145 | return mAig_NULL; |
---|
| 3146 | } |
---|
| 3147 | if ( !(Var_VariableTestIsValueInRange(nodeVar, nodeValue))) { |
---|
| 3148 | (void) fprintf(vis_stderr,"Value specified in RHS is not in domain of variable\n"); |
---|
| 3149 | (void) fprintf(vis_stderr,"%s = %s\n", nodeNameString, nodeValueString); |
---|
| 3150 | return mAig_NULL; |
---|
| 3151 | |
---|
| 3152 | } |
---|
| 3153 | } |
---|
| 3154 | result = bAig_GetCanonical(manager, |
---|
| 3155 | MvfAig_FunctionReadComponent(tmpMvfAig, nodeValue)); |
---|
| 3156 | return result; |
---|
| 3157 | } |
---|
| 3158 | |
---|
| 3159 | left = BmcCirCUsCreatebAigOfPropFormulaOriginal(network, manager, ltl->left); |
---|
| 3160 | if (left == mAig_NULL){ |
---|
| 3161 | return mAig_NULL; |
---|
| 3162 | } |
---|
| 3163 | right = BmcCirCUsCreatebAigOfPropFormulaOriginal(network, manager, ltl->right); |
---|
| 3164 | if (right == mAig_NULL && ltl->type ==Ctlsp_NOT_c ){ |
---|
| 3165 | return mAig_Not(left); |
---|
| 3166 | } |
---|
| 3167 | else if(right == mAig_NULL) { |
---|
| 3168 | return mAig_NULL; |
---|
| 3169 | } |
---|
| 3170 | |
---|
| 3171 | switch(ltl->type) { |
---|
| 3172 | /** |
---|
| 3173 | case Ctlsp_NOT_c: |
---|
| 3174 | result = mAig_Not(left); |
---|
| 3175 | break; |
---|
| 3176 | **/ |
---|
| 3177 | case Ctlsp_OR_c: |
---|
| 3178 | result = mAig_Or(manager, left, right); |
---|
| 3179 | break; |
---|
| 3180 | case Ctlsp_AND_c: |
---|
| 3181 | result = mAig_And(manager, left, right); |
---|
| 3182 | break; |
---|
| 3183 | case Ctlsp_THEN_c: |
---|
| 3184 | result = mAig_Then(manager, left, right); |
---|
| 3185 | break; |
---|
| 3186 | case Ctlsp_EQ_c: |
---|
| 3187 | result = mAig_Eq(manager, left, right); |
---|
| 3188 | break; |
---|
| 3189 | case Ctlsp_XOR_c: |
---|
| 3190 | result = mAig_Xor(manager, left, right); |
---|
| 3191 | break; |
---|
| 3192 | default: |
---|
| 3193 | fail("Unexpected LTL type"); |
---|
| 3194 | } |
---|
| 3195 | return result; |
---|
| 3196 | } /* BmcCirCUsCreatebAigOfPropFormulaOriginal */ |
---|
| 3197 | |
---|
| 3198 | /**Function******************************************************************** |
---|
| 3199 | |
---|
| 3200 | Synopsis [ Check the given string is integer] |
---|
| 3201 | |
---|
| 3202 | Description [ Check the given string is integer] |
---|
| 3203 | |
---|
| 3204 | SideEffects [] |
---|
| 3205 | |
---|
| 3206 | SeeAlso [] |
---|
| 3207 | |
---|
| 3208 | ******************************************************************************/ |
---|
| 3209 | |
---|
| 3210 | static int |
---|
| 3211 | StringCheckIsInteger( |
---|
| 3212 | char *string, |
---|
| 3213 | int *value) |
---|
| 3214 | { |
---|
| 3215 | char *ptr; |
---|
| 3216 | long l; |
---|
| 3217 | |
---|
| 3218 | l = strtol (string, &ptr, 0) ; |
---|
| 3219 | if(*ptr != '\0') |
---|
| 3220 | return 0; |
---|
| 3221 | if ((l > MAXINT) || (l < -1 - MAXINT)) |
---|
| 3222 | return 1 ; |
---|
| 3223 | *value = (int) l; |
---|
| 3224 | return 2 ; |
---|
| 3225 | } |
---|
| 3226 | |
---|
| 3227 | |
---|
| 3228 | /**Function******************************************************************** |
---|
| 3229 | |
---|
| 3230 | Synopsis [ CirCUs interface for bounded model checking.] |
---|
| 3231 | |
---|
| 3232 | Description [ CirCUs interface for bounded model checking. ] |
---|
| 3233 | |
---|
| 3234 | SideEffects [] |
---|
| 3235 | |
---|
| 3236 | SeeAlso [] |
---|
| 3237 | |
---|
| 3238 | ******************************************************************************/ |
---|
| 3239 | |
---|
| 3240 | satInterface_t * |
---|
| 3241 | BmcCirCUsInterface( |
---|
| 3242 | bAig_Manager_t *manager, |
---|
| 3243 | Ntk_Network_t *network, |
---|
| 3244 | bAigEdge_t object, |
---|
| 3245 | array_t *auxObjectArray, |
---|
| 3246 | BmcOption_t *bmcOption, |
---|
| 3247 | satInterface_t *interface) |
---|
| 3248 | { |
---|
| 3249 | satManager_t *cm; |
---|
| 3250 | satOption_t *option; |
---|
| 3251 | satLevel_t *d; |
---|
| 3252 | int i, size; |
---|
| 3253 | bAigEdge_t tv; |
---|
| 3254 | |
---|
| 3255 | /* allocate sat manager */ |
---|
| 3256 | cm = sat_InitManager(interface); |
---|
| 3257 | cm->nodesArraySize = manager->nodesArraySize; |
---|
| 3258 | cm->initNodesArraySize = manager->nodesArraySize; |
---|
| 3259 | cm->maxNodesArraySize = manager->maxNodesArraySize; |
---|
| 3260 | cm->nodesArray = manager->NodesArray; |
---|
| 3261 | cm->HashTable = manager->HashTable; |
---|
| 3262 | cm->literals = manager->literals; |
---|
| 3263 | cm->initNumVariables = (manager->nodesArraySize/bAigNodeSize); |
---|
| 3264 | cm->initNumClauses = 0; |
---|
| 3265 | cm->initNumLiterals = 0; |
---|
| 3266 | cm->comment = ALLOC(char, 2); |
---|
| 3267 | cm->comment[0] = ' '; |
---|
| 3268 | cm->comment[1] = '\0'; |
---|
| 3269 | cm->stdErr = vis_stderr; |
---|
| 3270 | cm->stdOut = vis_stdout; |
---|
| 3271 | cm->status = 0; |
---|
| 3272 | cm->orderedVariableArray = 0; |
---|
| 3273 | cm->unitLits = sat_ArrayAlloc(16); |
---|
| 3274 | cm->pureLits = sat_ArrayAlloc(16); |
---|
| 3275 | cm->option = 0; |
---|
| 3276 | cm->each = 0; |
---|
| 3277 | cm->decisionHead = 0; |
---|
| 3278 | cm->variableArray = 0; |
---|
| 3279 | cm->queue = 0; |
---|
| 3280 | cm->BDDQueue = 0; |
---|
| 3281 | cm->unusedAigQueue = 0; |
---|
| 3282 | if(interface) |
---|
| 3283 | cm->nonobjUnitLitArray = interface->nonobjUnitLitArray; |
---|
| 3284 | |
---|
| 3285 | if(auxObjectArray) { |
---|
| 3286 | cm->auxObj = sat_ArrayAlloc(auxObjectArray->num+1); |
---|
| 3287 | size = auxObjectArray->num; |
---|
| 3288 | for(i=0; i<size; i++) { |
---|
| 3289 | tv = array_fetch(bAigEdge_t, auxObjectArray, i); |
---|
| 3290 | if(tv == 1) continue; |
---|
| 3291 | else if(tv == 0) { |
---|
| 3292 | cm->status = SAT_UNSAT; |
---|
| 3293 | break; |
---|
| 3294 | } |
---|
| 3295 | sat_ArrayInsert(cm->auxObj, tv); |
---|
| 3296 | } |
---|
| 3297 | } |
---|
| 3298 | if(object == 0) cm->status = SAT_UNSAT; |
---|
| 3299 | else if(object == 1) cm->status = SAT_SAT; |
---|
| 3300 | |
---|
| 3301 | if(cm->status == 0) { |
---|
| 3302 | cm->obj = sat_ArrayAlloc(1); |
---|
| 3303 | sat_ArrayInsert(cm->obj, object); |
---|
| 3304 | |
---|
| 3305 | /* initialize option */ |
---|
| 3306 | option = sat_InitOption(); |
---|
| 3307 | option->cnfPrefix = bmcOption->cnfPrefix; |
---|
| 3308 | /*option->verbose = bmcOption->verbosityLevel; */ |
---|
| 3309 | option->verbose = 0; |
---|
| 3310 | option->timeoutLimit = bmcOption->timeOutPeriod; |
---|
| 3311 | |
---|
| 3312 | sat_SetIncrementalOption(option, bmcOption->incremental); |
---|
| 3313 | |
---|
| 3314 | cm->option = option; |
---|
| 3315 | cm->each = sat_InitStatistics(); |
---|
| 3316 | |
---|
| 3317 | BmcRestoreAssertion(manager, cm); |
---|
| 3318 | /* value reset.. */ |
---|
| 3319 | sat_CleanDatabase(cm); |
---|
| 3320 | /* set cone of influence */ |
---|
| 3321 | sat_SetConeOfInfluence(cm); |
---|
| 3322 | sat_AllocLiteralsDB(cm); |
---|
| 3323 | |
---|
| 3324 | if(bmcOption->cnfFileName != NIL(char)) { |
---|
| 3325 | sat_WriteCNF(cm, bmcOption->cnfFileName); |
---|
| 3326 | } |
---|
| 3327 | if(bmcOption->clauses == 0){ /* CirCUs circuit*/ |
---|
| 3328 | if (bmcOption->verbosityLevel == BmcVerbosityMax_c) { |
---|
| 3329 | fprintf(vis_stdout, |
---|
| 3330 | "Number of Variables = %d Number of Clauses = %d\n", |
---|
| 3331 | sat_GetNumberOfInitialVariables(cm), sat_GetNumberOfInitialClauses(cm)); |
---|
| 3332 | } |
---|
| 3333 | if (bmcOption->verbosityLevel >= BmcVerbosityMax_c) { |
---|
| 3334 | (void)fprintf(vis_stdout,"Calling SAT solver (CirCUs) ..."); |
---|
| 3335 | (void) fflush(vis_stdout); |
---|
| 3336 | } |
---|
| 3337 | sat_Main(cm); |
---|
| 3338 | if (bmcOption->verbosityLevel >= BmcVerbosityMax_c) { |
---|
| 3339 | (void) fprintf(vis_stdout," done "); |
---|
| 3340 | (void) fprintf(vis_stdout, "(%g s)\n", cm->each->satTime); |
---|
| 3341 | } |
---|
| 3342 | |
---|
| 3343 | } else if(bmcOption->clauses == 1) { /* CirCUs CNF */ |
---|
| 3344 | satArray_t *result; |
---|
| 3345 | char *fileName = NIL(char); |
---|
| 3346 | |
---|
| 3347 | sat_WriteCNF(cm, bmcOption->satInFile); |
---|
| 3348 | if(bmcOption->satSolver == cusp){ |
---|
| 3349 | fileName = BmcCirCUsCallCusp(bmcOption); |
---|
| 3350 | } |
---|
| 3351 | if(bmcOption->satSolver == CirCUs){ |
---|
| 3352 | fileName = BmcCirCUsCallCirCUs(bmcOption); |
---|
| 3353 | } |
---|
| 3354 | if(fileName != NIL(char)){ |
---|
| 3355 | result = sat_ReadForcedAssignment(fileName); |
---|
| 3356 | d = sat_AllocLevel(cm); |
---|
| 3357 | sat_PutAssignmentValueMain(cm, d, result); |
---|
| 3358 | sat_ArrayFree(result); |
---|
| 3359 | } |
---|
| 3360 | } |
---|
| 3361 | } |
---|
| 3362 | sat_CombineStatistics(cm); |
---|
| 3363 | |
---|
| 3364 | if(interface == 0) |
---|
| 3365 | interface = ALLOC(satInterface_t, 1); |
---|
| 3366 | |
---|
| 3367 | interface->total = cm->total; |
---|
| 3368 | interface->nonobjUnitLitArray = cm->nonobjUnitLitArray; |
---|
| 3369 | interface->objUnitLitArray = 0; |
---|
| 3370 | interface->savedConflictClauses = cm->savedConflictClauses; |
---|
| 3371 | interface->trieArray = cm->trieArray; |
---|
| 3372 | interface->status = cm->status; |
---|
| 3373 | cm->total = 0; |
---|
| 3374 | cm->nonobjUnitLitArray = 0; |
---|
| 3375 | cm->savedConflictClauses = 0; |
---|
| 3376 | |
---|
| 3377 | if(cm->maxNodesArraySize > manager->maxNodesArraySize) { |
---|
| 3378 | manager->maxNodesArraySize = cm->maxNodesArraySize; |
---|
| 3379 | manager->nameList = REALLOC(char *, manager->nameList , manager->maxNodesArraySize/bAigNodeSize); |
---|
| 3380 | manager->bddIdArray = REALLOC(int , manager->bddIdArray , manager->maxNodesArraySize/bAigNodeSize); |
---|
| 3381 | manager->bddArray = REALLOC(bdd_t *, manager->bddArray , manager->maxNodesArraySize/bAigNodeSize); |
---|
| 3382 | } |
---|
| 3383 | manager->NodesArray = cm->nodesArray; |
---|
| 3384 | manager->literals = cm->literals; |
---|
| 3385 | |
---|
| 3386 | /* For the case that the input contains CNF clauese; */ |
---|
| 3387 | if(cm->literals) |
---|
| 3388 | cm->literals->last = cm->literals->initialSize; |
---|
| 3389 | cm->nodesArray = 0; |
---|
| 3390 | cm->HashTable = 0; |
---|
| 3391 | cm->timeframe = 0; |
---|
| 3392 | cm->timeframeWOI = 0; |
---|
| 3393 | cm->literals = 0; |
---|
| 3394 | |
---|
| 3395 | sat_FreeManager(cm); |
---|
| 3396 | |
---|
| 3397 | return(interface); |
---|
| 3398 | } |
---|
| 3399 | |
---|
| 3400 | /**Function******************************************************************** |
---|
| 3401 | |
---|
| 3402 | Synopsis [ CirCUs interface for bounded model checking.] |
---|
| 3403 | |
---|
| 3404 | Description [ CirCUs interface for bounded model checking. ] |
---|
| 3405 | |
---|
| 3406 | SideEffects [] |
---|
| 3407 | |
---|
| 3408 | SeeAlso [] |
---|
| 3409 | |
---|
| 3410 | ******************************************************************************/ |
---|
| 3411 | |
---|
| 3412 | satInterface_t * |
---|
| 3413 | BmcCirCUsInterfaceWithObjArr( |
---|
| 3414 | bAig_Manager_t *manager, |
---|
| 3415 | Ntk_Network_t *network, |
---|
| 3416 | array_t *objectArray, |
---|
| 3417 | array_t *auxObjectArray, |
---|
| 3418 | BmcOption_t *bmcOption, |
---|
| 3419 | satInterface_t *interface) |
---|
| 3420 | { |
---|
| 3421 | satManager_t *cm; |
---|
| 3422 | satOption_t *option; |
---|
| 3423 | int i, size; |
---|
| 3424 | bAigEdge_t tv; |
---|
| 3425 | |
---|
| 3426 | /* allocate sat manager */ |
---|
| 3427 | cm = sat_InitManager(interface); |
---|
| 3428 | cm->nodesArraySize = manager->nodesArraySize; |
---|
| 3429 | cm->initNodesArraySize = manager->nodesArraySize; |
---|
| 3430 | cm->maxNodesArraySize = manager->maxNodesArraySize; |
---|
| 3431 | cm->nodesArray = manager->NodesArray; |
---|
| 3432 | cm->HashTable = manager->HashTable; |
---|
| 3433 | cm->literals = manager->literals; |
---|
| 3434 | cm->initNumVariables = (manager->nodesArraySize/bAigNodeSize); |
---|
| 3435 | cm->initNumClauses = 0; |
---|
| 3436 | cm->initNumLiterals = 0; |
---|
| 3437 | cm->comment = ALLOC(char, 2); |
---|
| 3438 | cm->comment[0] = ' '; |
---|
| 3439 | cm->comment[1] = '\0'; |
---|
| 3440 | cm->stdErr = vis_stderr; |
---|
| 3441 | cm->stdOut = vis_stdout; |
---|
| 3442 | cm->status = 0; |
---|
| 3443 | cm->orderedVariableArray = 0; |
---|
| 3444 | cm->unitLits = sat_ArrayAlloc(16); |
---|
| 3445 | cm->pureLits = sat_ArrayAlloc(16); |
---|
| 3446 | cm->option = 0; |
---|
| 3447 | cm->each = 0; |
---|
| 3448 | cm->decisionHead = 0; |
---|
| 3449 | cm->variableArray = 0; |
---|
| 3450 | cm->queue = 0; |
---|
| 3451 | cm->BDDQueue = 0; |
---|
| 3452 | cm->unusedAigQueue = 0; |
---|
| 3453 | if(interface) |
---|
| 3454 | cm->nonobjUnitLitArray = interface->nonobjUnitLitArray; |
---|
| 3455 | |
---|
| 3456 | if(auxObjectArray) { |
---|
| 3457 | cm->auxObj = sat_ArrayAlloc(auxObjectArray->num+1); |
---|
| 3458 | size = auxObjectArray->num; |
---|
| 3459 | for(i=0; i<size; i++) { |
---|
| 3460 | tv = array_fetch(bAigEdge_t, auxObjectArray, i); |
---|
| 3461 | if(tv == 1) continue; |
---|
| 3462 | else if(tv == 0) { |
---|
| 3463 | cm->status = SAT_UNSAT; |
---|
| 3464 | break; |
---|
| 3465 | } |
---|
| 3466 | sat_ArrayInsert(cm->auxObj, tv); |
---|
| 3467 | } |
---|
| 3468 | } |
---|
| 3469 | if(objectArray) { |
---|
| 3470 | cm->obj = sat_ArrayAlloc(objectArray->num+1); |
---|
| 3471 | size = objectArray->num; |
---|
| 3472 | for(i=0; i<size; i++) { |
---|
| 3473 | tv = array_fetch(bAigEdge_t, objectArray, i); |
---|
| 3474 | if(tv == 1) continue; |
---|
| 3475 | else if(tv == 0) { |
---|
| 3476 | cm->status = SAT_UNSAT; |
---|
| 3477 | break; |
---|
| 3478 | } |
---|
| 3479 | sat_ArrayInsert(cm->obj, tv); |
---|
| 3480 | } |
---|
| 3481 | } |
---|
| 3482 | |
---|
| 3483 | if(cm->status == 0) { |
---|
| 3484 | /* initialize option */ |
---|
| 3485 | option = sat_InitOption(); |
---|
| 3486 | option->cnfPrefix = bmcOption->cnfPrefix; |
---|
| 3487 | /*option->verbose = bmcOption->verbosityLevel; */ |
---|
| 3488 | option->verbose = 0; |
---|
| 3489 | option->timeoutLimit = bmcOption->timeOutPeriod; |
---|
| 3490 | |
---|
| 3491 | sat_SetIncrementalOption(option, bmcOption->incremental); |
---|
| 3492 | |
---|
| 3493 | cm->option = option; |
---|
| 3494 | cm->each = sat_InitStatistics(); |
---|
| 3495 | |
---|
| 3496 | BmcRestoreAssertion(manager, cm); |
---|
| 3497 | /* value reset.. */ |
---|
| 3498 | sat_CleanDatabase(cm); |
---|
| 3499 | /* set cone of influence */ |
---|
| 3500 | sat_SetConeOfInfluence(cm); |
---|
| 3501 | sat_AllocLiteralsDB(cm); |
---|
| 3502 | |
---|
| 3503 | if(bmcOption->cnfFileName != NIL(char)) { |
---|
| 3504 | sat_WriteCNF(cm, bmcOption->cnfFileName); |
---|
| 3505 | } |
---|
| 3506 | if(bmcOption->clauses == 0){ /* CirCUs circuit*/ |
---|
| 3507 | if (bmcOption->verbosityLevel == BmcVerbosityMax_c) { |
---|
| 3508 | fprintf(vis_stdout, |
---|
| 3509 | "Number of Variables = %d Number of Clauses = %d\n", |
---|
| 3510 | sat_GetNumberOfInitialVariables(cm), sat_GetNumberOfInitialClauses(cm)); |
---|
| 3511 | } |
---|
| 3512 | if (bmcOption->verbosityLevel >= BmcVerbosityMax_c) { |
---|
| 3513 | (void)fprintf(vis_stdout,"Calling SAT solver (CirCUs) ..."); |
---|
| 3514 | (void) fflush(vis_stdout); |
---|
| 3515 | } |
---|
| 3516 | sat_Main(cm); |
---|
| 3517 | if (bmcOption->verbosityLevel >= BmcVerbosityMax_c) { |
---|
| 3518 | (void) fprintf(vis_stdout," done "); |
---|
| 3519 | (void) fprintf(vis_stdout, "(%g s)\n", cm->each->satTime); |
---|
| 3520 | } |
---|
| 3521 | }else if(bmcOption->clauses == 1) { /* CirCUs CNF */ |
---|
| 3522 | satArray_t *result; |
---|
| 3523 | char *fileName = NIL(char); |
---|
| 3524 | |
---|
| 3525 | sat_WriteCNF(cm, bmcOption->satInFile); |
---|
| 3526 | if(bmcOption->satSolver == cusp){ |
---|
| 3527 | fileName = BmcCirCUsCallCusp(bmcOption); |
---|
| 3528 | } else{ |
---|
| 3529 | if(bmcOption->satSolver == CirCUs){ |
---|
| 3530 | fileName = BmcCirCUsCallCirCUs(bmcOption); |
---|
| 3531 | } |
---|
| 3532 | } |
---|
| 3533 | if(fileName != NIL(char)){ |
---|
| 3534 | satLevel_t *d; |
---|
| 3535 | |
---|
| 3536 | cm->status = SAT_SAT; |
---|
| 3537 | result = sat_ReadForcedAssignment(fileName); |
---|
| 3538 | d = sat_AllocLevel(cm); |
---|
| 3539 | sat_PutAssignmentValueMain(cm, d, result); |
---|
| 3540 | sat_ArrayFree(result); |
---|
| 3541 | } else { |
---|
| 3542 | cm->status = SAT_UNSAT; |
---|
| 3543 | } |
---|
| 3544 | } |
---|
| 3545 | /*sat_ReportStatistics(cm, cm->each);*/ |
---|
| 3546 | } |
---|
| 3547 | sat_CombineStatistics(cm); |
---|
| 3548 | |
---|
| 3549 | if(interface == 0){ |
---|
| 3550 | interface = ALLOC(satInterface_t, 1); |
---|
| 3551 | } |
---|
| 3552 | interface->total = cm->total; |
---|
| 3553 | interface->nonobjUnitLitArray = cm->nonobjUnitLitArray; |
---|
| 3554 | interface->objUnitLitArray = 0; |
---|
| 3555 | interface->savedConflictClauses = cm->savedConflictClauses; |
---|
| 3556 | interface->trieArray = cm->trieArray; |
---|
| 3557 | interface->status = cm->status; |
---|
| 3558 | cm->total = 0; |
---|
| 3559 | cm->nonobjUnitLitArray = 0; |
---|
| 3560 | cm->savedConflictClauses = 0; |
---|
| 3561 | |
---|
| 3562 | if(cm->maxNodesArraySize > manager->maxNodesArraySize) { |
---|
| 3563 | manager->maxNodesArraySize = cm->maxNodesArraySize; |
---|
| 3564 | manager->nameList = REALLOC(char *, manager->nameList , manager->maxNodesArraySize/bAigNodeSize); |
---|
| 3565 | manager->bddIdArray = REALLOC(int , manager->bddIdArray , manager->maxNodesArraySize/bAigNodeSize); |
---|
| 3566 | manager->bddArray = REALLOC(bdd_t *, manager->bddArray , manager->maxNodesArraySize/bAigNodeSize); |
---|
| 3567 | } |
---|
| 3568 | manager->NodesArray = cm->nodesArray; |
---|
| 3569 | manager->literals = cm->literals; |
---|
| 3570 | |
---|
| 3571 | /* |
---|
| 3572 | For the case that the input contains CNF clauses; |
---|
| 3573 | */ |
---|
| 3574 | if(cm->literals) |
---|
| 3575 | cm->literals->last = cm->literals->initialSize; |
---|
| 3576 | cm->nodesArray = 0; |
---|
| 3577 | cm->HashTable = 0; |
---|
| 3578 | cm->timeframe = 0; |
---|
| 3579 | cm->timeframeWOI = 0; |
---|
| 3580 | cm->literals = 0; |
---|
| 3581 | |
---|
| 3582 | sat_FreeManager(cm); |
---|
| 3583 | |
---|
| 3584 | return(interface); |
---|
| 3585 | } |
---|
| 3586 | |
---|
| 3587 | |
---|
| 3588 | /**Function******************************************************************** |
---|
| 3589 | |
---|
| 3590 | Synopsis [ Create Manager for debug purpose.] |
---|
| 3591 | |
---|
| 3592 | Description [ Create Manager for debug purpose.] |
---|
| 3593 | |
---|
| 3594 | SideEffects [] |
---|
| 3595 | |
---|
| 3596 | SeeAlso [] |
---|
| 3597 | |
---|
| 3598 | ******************************************************************************/ |
---|
| 3599 | satManager_t * |
---|
| 3600 | BmcCirCUsCreateManager( |
---|
| 3601 | Ntk_Network_t *network) |
---|
| 3602 | { |
---|
| 3603 | satManager_t *cm; |
---|
| 3604 | bAig_Manager_t *manager; |
---|
| 3605 | satOption_t *option; |
---|
| 3606 | |
---|
| 3607 | manager = Ntk_NetworkReadMAigManager(network); |
---|
| 3608 | /* allocate sat manager*/ |
---|
| 3609 | cm = sat_InitManager(0); |
---|
| 3610 | cm->nodesArraySize = manager->nodesArraySize; |
---|
| 3611 | cm->initNodesArraySize = manager->nodesArraySize; |
---|
| 3612 | cm->maxNodesArraySize = manager->maxNodesArraySize; |
---|
| 3613 | cm->nodesArray = manager->NodesArray; |
---|
| 3614 | cm->HashTable = manager->HashTable; |
---|
| 3615 | cm->literals = manager->literals; |
---|
| 3616 | cm->initNumVariables = (manager->nodesArraySize/bAigNodeSize); |
---|
| 3617 | cm->initNumClauses = 0; |
---|
| 3618 | cm->initNumLiterals = 0; |
---|
| 3619 | cm->comment = ALLOC(char, 2); |
---|
| 3620 | cm->comment[0] = ' '; |
---|
| 3621 | cm->comment[1] = '\0'; |
---|
| 3622 | cm->stdErr = vis_stderr; |
---|
| 3623 | cm->stdOut = vis_stdout; |
---|
| 3624 | cm->status = 0; |
---|
| 3625 | cm->orderedVariableArray = 0; |
---|
| 3626 | cm->unitLits = sat_ArrayAlloc(16); |
---|
| 3627 | cm->pureLits = sat_ArrayAlloc(16); |
---|
| 3628 | cm->option = 0; |
---|
| 3629 | cm->each = 0; |
---|
| 3630 | cm->decisionHead = 0; |
---|
| 3631 | cm->variableArray = 0; |
---|
| 3632 | cm->queue = 0; |
---|
| 3633 | cm->BDDQueue = 0; |
---|
| 3634 | cm->unusedAigQueue = 0; |
---|
| 3635 | |
---|
| 3636 | if(cm->status == 0) { |
---|
| 3637 | /* initialize option*/ |
---|
| 3638 | option = sat_InitOption(); |
---|
| 3639 | /*option->verbose = bmcOption->verbosityLevel;*/ |
---|
| 3640 | option->verbose = 0; |
---|
| 3641 | |
---|
| 3642 | cm->option = option; |
---|
| 3643 | cm->each = sat_InitStatistics(); |
---|
| 3644 | |
---|
| 3645 | BmcRestoreAssertion(manager, cm); |
---|
| 3646 | /* value reset..*/ |
---|
| 3647 | sat_CleanDatabase(cm); |
---|
| 3648 | /* set cone of influence*/ |
---|
| 3649 | sat_SetConeOfInfluence(cm); |
---|
| 3650 | sat_AllocLiteralsDB(cm); |
---|
| 3651 | |
---|
| 3652 | /*sat_ReportStatistics(cm, cm->each);*/ |
---|
| 3653 | } |
---|
| 3654 | sat_CombineStatistics(cm); |
---|
| 3655 | |
---|
| 3656 | /* |
---|
| 3657 | For the case that the input contains CNF clauese; |
---|
| 3658 | */ |
---|
| 3659 | if(cm->literals) |
---|
| 3660 | cm->literals->last = cm->literals->initialSize; |
---|
| 3661 | |
---|
| 3662 | return(cm); |
---|
| 3663 | } |
---|
| 3664 | /**Function******************************************************************** |
---|
| 3665 | |
---|
| 3666 | Synopsis [Return a list of AIG in the initialized timeframe corrsponding to |
---|
| 3667 | the input of all lateches in COI table] |
---|
| 3668 | |
---|
| 3669 | Description [] |
---|
| 3670 | |
---|
| 3671 | SideEffects [] |
---|
| 3672 | |
---|
| 3673 | SeeAlso [] |
---|
| 3674 | |
---|
| 3675 | ******************************************************************************/ |
---|
| 3676 | |
---|
| 3677 | st_table * |
---|
| 3678 | BmcCirCUsGetCoiIndexTable( |
---|
| 3679 | Ntk_Network_t *network, |
---|
| 3680 | st_table *coiTable) |
---|
| 3681 | { |
---|
| 3682 | mAig_Manager_t *manager = Ntk_NetworkReadMAigManager(network); |
---|
| 3683 | Ntk_Node_t *node; |
---|
| 3684 | st_generator *gen; |
---|
| 3685 | int tmp; |
---|
| 3686 | st_table *node2MvfAigTable = |
---|
| 3687 | (st_table *)Ntk_NetworkReadApplInfo(network, MVFAIG_NETWORK_APPL_KEY); |
---|
| 3688 | int mvfSize, index, i; |
---|
| 3689 | bAigEdge_t v; |
---|
| 3690 | MvfAig_Function_t *mvfAig; |
---|
| 3691 | st_table *li2index, *coiIndexTable; |
---|
| 3692 | |
---|
| 3693 | assert(manager->timeframe != 0); |
---|
| 3694 | /* |
---|
| 3695 | Mohammad Says: |
---|
| 3696 | This may solve the problem of calling expandTimeframe before calling this |
---|
| 3697 | function. Check with HoonSang. |
---|
| 3698 | |
---|
| 3699 | if(timeframe == 0) |
---|
| 3700 | timeframe = bAig_InitTimeFrame(network, manager, 1); |
---|
| 3701 | */ |
---|
| 3702 | |
---|
| 3703 | /* |
---|
| 3704 | li2index stores AIG id for inputs of all latches |
---|
| 3705 | */ |
---|
| 3706 | li2index = manager->timeframe->li2index; |
---|
| 3707 | coiIndexTable = st_init_table(st_numcmp, st_numhash); |
---|
| 3708 | |
---|
| 3709 | st_foreach_item_int(coiTable, gen, &node, &tmp) { |
---|
| 3710 | if(!Ntk_NodeTestIsLatch(node)) continue; |
---|
| 3711 | st_lookup(node2MvfAigTable, node, &mvfAig); |
---|
| 3712 | mvfSize = array_n(mvfAig); |
---|
| 3713 | for(i=0; i< mvfSize; i++){ |
---|
| 3714 | v = bAig_GetCanonical(manager, MvfAig_FunctionReadComponent(mvfAig, i)); |
---|
| 3715 | if(st_lookup_int(li2index, (char *)v, &index)) |
---|
| 3716 | st_insert(coiIndexTable, (char *)(long)index, (char *)(long)index); |
---|
| 3717 | } |
---|
| 3718 | } |
---|
| 3719 | return(coiIndexTable); |
---|
| 3720 | } |
---|
| 3721 | |
---|
| 3722 | /**Function******************************************************************** |
---|
| 3723 | |
---|
| 3724 | Synopsis [ Restore aseerted node for SAT solving] |
---|
| 3725 | |
---|
| 3726 | Description [ Restore aseerted node for SAT solving] |
---|
| 3727 | |
---|
| 3728 | SideEffects [] |
---|
| 3729 | |
---|
| 3730 | SeeAlso [bAig_ExpandTimeFrame] |
---|
| 3731 | |
---|
| 3732 | ******************************************************************************/ |
---|
| 3733 | void |
---|
| 3734 | BmcRestoreAssertion(bAig_Manager_t *manager, satManager_t *cm) |
---|
| 3735 | { |
---|
| 3736 | int size, i, v; |
---|
| 3737 | array_t *asserted; |
---|
| 3738 | |
---|
| 3739 | if(manager->timeframe && manager->timeframe->assertedArray) { |
---|
| 3740 | asserted = manager->timeframe->assertedArray; |
---|
| 3741 | size = asserted->num; |
---|
| 3742 | cm->assertion = sat_ArrayAlloc(size); |
---|
| 3743 | for(i=0; i<size; i++) { |
---|
| 3744 | v = array_fetch(int, asserted, i); |
---|
| 3745 | sat_ArrayInsert(cm->assertion, v); |
---|
| 3746 | } |
---|
| 3747 | } |
---|
| 3748 | else { |
---|
| 3749 | cm->assertion = 0; |
---|
| 3750 | } |
---|
| 3751 | } |
---|
| 3752 | |
---|
| 3753 | |
---|
| 3754 | |
---|
| 3755 | /*---------------------------------------------------------------------------*/ |
---|
| 3756 | /* Definition of static functions */ |
---|
| 3757 | /*---------------------------------------------------------------------------*/ |
---|
| 3758 | |
---|
| 3759 | /**Function******************************************************************** |
---|
| 3760 | |
---|
| 3761 | Synopsis [Check if the property is TRUE or FALSE] |
---|
| 3762 | |
---|
| 3763 | Description [] |
---|
| 3764 | |
---|
| 3765 | SideEffects [] |
---|
| 3766 | |
---|
| 3767 | SeeAlso [] |
---|
| 3768 | |
---|
| 3769 | ******************************************************************************/ |
---|
| 3770 | static int |
---|
| 3771 | verifyIfConstant( |
---|
| 3772 | bAigEdge_t property) |
---|
| 3773 | { |
---|
| 3774 | |
---|
| 3775 | if (property == bAig_One){ |
---|
| 3776 | fprintf(vis_stdout,"# BMC: Empty counterexample because the property is always FALSE\n"); |
---|
| 3777 | fprintf(vis_stdout,"# BMC: formula failed\n"); |
---|
| 3778 | return 1; |
---|
| 3779 | } else if (property == bAig_Zero){ |
---|
| 3780 | fprintf(vis_stdout,"# BMC: The property is always TRUE\n"); |
---|
| 3781 | fprintf(vis_stdout,"# BMC: formula passed\n"); |
---|
| 3782 | return 1; |
---|
| 3783 | } |
---|
| 3784 | return 0; |
---|
| 3785 | } |
---|