[14] | 1 | /**CFile*********************************************************************** |
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| 2 | |
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| 3 | FileName [bmcCirCUsUtil.c] |
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| 4 | |
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| 5 | PackageName [bmc] |
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| 6 | |
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| 7 | Synopsis [Utilities for bmcCirCUs] |
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| 8 | |
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| 9 | Author [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 | |
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| 20 | static char rcsid[] UNUSED = "$Id: bmcCirCUsUtil.c,v 1.22 2010/04/10 04:07:06 fabio Exp $"; |
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| 21 | |
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| 22 | /*---------------------------------------------------------------------------*/ |
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| 23 | /* Constant declarations */ |
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| 24 | /*---------------------------------------------------------------------------*/ |
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| 25 | |
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| 26 | #define MAX_LENGTH 320 /* Max. length of a string while reading a file */ |
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| 27 | |
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| 28 | /*---------------------------------------------------------------------------*/ |
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| 29 | /* Type declarations */ |
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| 30 | /*---------------------------------------------------------------------------*/ |
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| 31 | |
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| 32 | /*---------------------------------------------------------------------------*/ |
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| 33 | /* Structure declarations */ |
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| 34 | /*---------------------------------------------------------------------------*/ |
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| 35 | |
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| 36 | /*---------------------------------------------------------------------------*/ |
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| 37 | /* Variable declarations */ |
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| 38 | /*---------------------------------------------------------------------------*/ |
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| 39 | |
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| 40 | /**AutomaticStart*************************************************************/ |
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| 41 | |
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| 42 | /*---------------------------------------------------------------------------*/ |
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| 43 | /* Static function prototypes */ |
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| 44 | /*---------------------------------------------------------------------------*/ |
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| 45 | |
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| 46 | static char * getBddName(bdd_manager *bddManager, bdd_node *node); |
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| 47 | static bAigEdge_t getAigAtTimeFrame(bAig_Manager_t *manager, bAigEdge_t node, int i, int withInitialState); |
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| 48 | static bAigEdge_t getAigOfBddAtState(Ntk_Network_t *network, bdd_node *node, int state, int withInitialState); |
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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 [Check for termination for safety properties.] |
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| 63 | |
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| 64 | Description [Check for termination for safety properties.] |
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| 65 | SideEffects [] |
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| 66 | |
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| 67 | SeeAlso [] |
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| 68 | |
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| 69 | ******************************************************************************/ |
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| 70 | void |
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| 71 | BmcCirCUsAutLtlCheckTerminalAutomaton( |
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| 72 | Ntk_Network_t *network, |
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| 73 | bAig_Manager_t *aigManager, |
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| 74 | st_table *nodeToMvfAigTable, |
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| 75 | BmcCheckForTermination_t *terminationStatus, |
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| 76 | st_table *coiIndexTable, |
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| 77 | BmcOption_t *options) |
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| 78 | { |
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| 79 | long startTime, endTime; |
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| 80 | int k = terminationStatus->k; |
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| 81 | int returnStatus = 0; |
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| 82 | Ltl_Automaton_t *automaton = terminationStatus->automaton; |
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| 83 | satInterface_t *tInterface, *etInterface; |
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| 84 | bAigEdge_t autPath, property; |
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| 85 | array_t *objArray; |
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| 86 | array_t *previousResultArray; |
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| 87 | |
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| 88 | startTime = util_cpu_ctime(); |
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| 89 | |
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| 90 | if (options->verbosityLevel == BmcVerbosityMax_c) { |
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| 91 | (void) fprintf(vis_stdout, "\nBMC: Check for termination\n"); |
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| 92 | } |
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| 93 | etInterface = 0; |
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| 94 | tInterface = 0; |
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| 95 | /* |
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| 96 | Hold objects |
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| 97 | */ |
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| 98 | objArray = array_alloc(bAigEdge_t, 2); |
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| 99 | previousResultArray = array_alloc(bAigEdge_t, 0); |
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| 100 | returnStatus = 0; |
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| 101 | |
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| 102 | autPath = BmcCirCUsCreateAigForSimpleCompositePath(network, aigManager, automaton, |
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| 103 | 0, k+1, nodeToMvfAigTable, |
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| 104 | coiIndexTable, |
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| 105 | BMC_NO_INITIAL_STATES); |
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| 106 | |
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| 107 | property = bAig_Not( |
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| 108 | BmcCirCUsBdd2Aig(network, automaton->fairSets, k, -1, |
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| 109 | automaton, aigManager, BMC_NO_INITIAL_STATES)); |
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| 110 | |
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| 111 | property = bAig_And(aigManager, property, |
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| 112 | BmcCirCUsBdd2Aig(network, automaton->fairSets, k+1, -1, |
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| 113 | automaton, aigManager, BMC_NO_INITIAL_STATES)); |
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| 114 | options->cnfPrefix = k+1; |
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| 115 | array_insert(bAigEdge_t, objArray, 0, property); |
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| 116 | array_insert(bAigEdge_t, objArray, 1, autPath); |
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| 117 | tInterface = BmcCirCUsInterfaceWithObjArr(aigManager, network, objArray, |
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| 118 | previousResultArray, options, tInterface); |
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| 119 | if(tInterface->status == SAT_UNSAT){ |
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| 120 | returnStatus = 1; |
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| 121 | } |
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| 122 | |
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| 123 | /* =========================== |
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| 124 | Early termination condition |
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| 125 | =========================== |
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| 126 | */ |
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| 127 | if ((options->earlyTermination)&&(returnStatus ==0)) { |
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| 128 | if (options->verbosityLevel == BmcVerbosityMax_c) { |
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| 129 | (void) fprintf(vis_stdout, "\nChecking the early termination at k= %d\n", k); |
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| 130 | } |
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| 131 | |
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| 132 | autPath = BmcCirCUsCreateAigForSimpleCompositePath(network, aigManager, automaton, |
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| 133 | 0, k+1, nodeToMvfAigTable, |
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| 134 | coiIndexTable, |
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| 135 | BMC_INITIAL_STATES); |
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| 136 | array_insert(bAigEdge_t, objArray, 0, autPath); |
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| 137 | array_insert(bAigEdge_t, objArray, 1, bAig_One); |
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| 138 | options->cnfPrefix = k+1; |
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| 139 | etInterface = BmcCirCUsInterfaceWithObjArr(aigManager, network, objArray, |
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| 140 | previousResultArray, options, etInterface); |
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| 141 | |
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| 142 | if(etInterface->status == SAT_UNSAT){ |
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| 143 | (void) fprintf(vis_stdout, "# BMC: by early termination\n"); |
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| 144 | returnStatus = 1; |
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| 145 | } |
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| 146 | } /* Early termination */ |
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| 147 | |
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| 148 | if (options->verbosityLevel != BmcVerbosityNone_c) { |
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| 149 | endTime = util_cpu_ctime(); |
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| 150 | fprintf(vis_stdout, "-- Check for termination time time = %10g\n", |
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| 151 | (double)(endTime - startTime) / 1000.0); |
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| 152 | } |
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| 153 | array_free(objArray); |
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| 154 | array_free(previousResultArray); |
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| 155 | |
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| 156 | terminationStatus->action = returnStatus; |
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| 157 | |
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| 158 | } /* BmcCirCUsAutLtlCheckTerminalAutomaton */ |
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| 159 | |
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| 160 | |
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| 161 | |
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| 162 | /**Function******************************************************************** |
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| 163 | |
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| 164 | Synopsis [Build AIG for a given function in BDD at a given time period] |
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| 165 | |
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| 166 | Description [Build AIG for a BDD at a time period. If next != -1, then the |
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| 167 | passed BDD represents a transition relation.] |
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| 168 | |
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| 169 | SideEffects [] |
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| 170 | |
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| 171 | SeeAlso [BmcAutEncodeAutomatonStates BmcAutBuildTransitionRelation] |
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| 172 | |
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| 173 | ******************************************************************************/ |
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| 174 | bAigEdge_t |
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| 175 | BmcCirCUsBdd2Aig( |
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| 176 | Ntk_Network_t *network, |
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| 177 | bdd_t *function, |
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| 178 | int current, |
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| 179 | int next, |
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| 180 | Ltl_Automaton_t *automaton, |
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| 181 | bAig_Manager_t *aigManager, |
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| 182 | int withInitialState) |
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| 183 | { |
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| 184 | bdd_manager *bddManager; |
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| 185 | bdd_node *node; |
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| 186 | bdd_gen *gen; |
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| 187 | |
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| 188 | array_t *cube; |
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| 189 | int i, value; |
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| 190 | int state = current; |
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| 191 | bAigEdge_t aigFunction, andFunction, aigNode; |
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| 192 | |
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| 193 | if (function == NULL){ |
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| 194 | return bAig_NULL; |
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| 195 | } |
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| 196 | /* |
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| 197 | If BDD represents a constant value |
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| 198 | */ |
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| 199 | if(bdd_is_tautology(function, 0)){ |
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| 200 | return bAig_Zero; |
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| 201 | } |
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| 202 | if(bdd_is_tautology(function, 1)){ |
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| 203 | return bAig_One; |
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| 204 | } |
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| 205 | |
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| 206 | bddManager = bdd_get_manager(function); |
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| 207 | aigFunction = bAig_Zero; |
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| 208 | foreach_bdd_cube(function, gen, cube){ |
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| 209 | andFunction = bAig_One; |
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| 210 | arrayForEachItem(int, cube, i, value){ |
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| 211 | if (value != 2){ |
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| 212 | int j; |
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| 213 | /* |
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| 214 | If the BDD varaible is a next state varaible, we use the corresponding |
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| 215 | current state varaible but with next state index. |
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| 216 | */ |
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| 217 | if (next != -1 && st_lookup_int(automaton->nsPsTable, (char *)(long)i, &j)){ |
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| 218 | node = bdd_bdd_ith_var(bddManager, j); |
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| 219 | state = next; |
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| 220 | } else { |
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| 221 | node = bdd_bdd_ith_var(bddManager, i); |
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| 222 | state = current; |
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| 223 | } |
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| 224 | aigNode = getAigOfBddAtState(network, node, state, withInitialState); |
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| 225 | if (value == 0){ |
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| 226 | aigNode = bAig_Not(aigNode); |
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| 227 | } |
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| 228 | andFunction = bAig_And(aigManager, andFunction, aigNode); |
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| 229 | } |
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| 230 | } |
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| 231 | aigFunction = bAig_Or(aigManager, aigFunction, andFunction); |
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| 232 | }/* foreach_bdd_cube */ |
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| 233 | |
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| 234 | return aigFunction; |
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| 235 | } /* BmcCirCUsBdd2Aig */ |
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| 236 | |
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| 237 | |
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| 238 | /**Function******************************************************************** |
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| 239 | |
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| 240 | Synopsis [Build AIG for a path in the automaton.] |
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| 241 | |
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| 242 | Description [Build AIG for a path in the automaton starting from "fromState" |
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| 243 | and ending at "toState". If "initialState" = BMC_INITIAL_STATES, then the |
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| 244 | path starts from an initial state.] |
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| 245 | |
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| 246 | SideEffects [] |
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| 247 | |
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| 248 | SeeAlso [] |
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| 249 | |
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| 250 | ******************************************************************************/ |
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| 251 | bAigEdge_t |
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| 252 | BmcCirCUsAutCreateAigForPath( |
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| 253 | Ntk_Network_t *network, |
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| 254 | bAig_Manager_t *aigManager, |
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| 255 | Ltl_Automaton_t *automaton, |
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| 256 | int fromState, |
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| 257 | int toState, |
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| 258 | int initialState) |
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| 259 | { |
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| 260 | int k; |
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| 261 | bAigEdge_t result, aigFunction = bAig_One; |
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| 262 | |
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| 263 | if(initialState){ |
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| 264 | result = BmcCirCUsBdd2Aig(network, automaton->initialStates, 0, -1, |
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| 265 | automaton, aigManager, initialState); |
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| 266 | aigFunction = result; |
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| 267 | } |
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| 268 | for(k=fromState; k<toState; k++){ |
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| 269 | result = BmcCirCUsBdd2Aig(network, automaton->transitionRelation, k, k+1, |
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| 270 | automaton, aigManager, initialState); |
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| 271 | aigFunction = bAig_And(aigManager , aigFunction, result); |
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| 272 | } |
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| 273 | return aigFunction; |
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| 274 | |
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| 275 | } /* BmcCirCUsAutCreateAigForPath */ |
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| 276 | |
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| 277 | /**Function******************************************************************** |
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| 278 | |
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| 279 | Synopsis [Build AIG for a simple path in the automaton.] |
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| 280 | |
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| 281 | Description [Build AIG a simple path in the automaton starting from |
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| 282 | "fromState" and ending at "toState". If "initialState" = |
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| 283 | BMC_INITIAL_STATES, the the path starts from an initial state.] |
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| 284 | |
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| 285 | SideEffects [] |
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| 286 | |
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| 287 | SeeAlso [] |
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| 288 | |
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| 289 | ******************************************************************************/ |
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| 290 | bAigEdge_t |
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| 291 | BmcCirCUsAutCreateAigForSimplePath( |
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| 292 | Ntk_Network_t *network, |
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| 293 | bAig_Manager_t *aigManager, |
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| 294 | Ltl_Automaton_t *automaton, |
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| 295 | int fromState, |
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| 296 | int toState, |
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| 297 | int initialState) |
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| 298 | { |
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| 299 | int i, j, bddID; |
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| 300 | bAigEdge_t result, aigFunction, next, current; |
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| 301 | mdd_manager *bddManager = Ntk_NetworkReadMddManager(network); |
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| 302 | st_generator *stGen; |
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| 303 | |
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| 304 | bdd_node *node; |
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| 305 | |
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| 306 | |
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| 307 | |
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| 308 | aigFunction = BmcCirCUsAutCreateAigForPath(network, aigManager, automaton, |
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| 309 | fromState, toState, initialState); |
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| 310 | /* |
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| 311 | The path is simple path |
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| 312 | */ |
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| 313 | for(i = fromState + 1; i <= toState; i++){ |
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| 314 | for(j=fromState; j < i; j++){ |
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| 315 | result = bAig_Zero; |
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| 316 | st_foreach_item(automaton->psNsTable, stGen,&bddID, NULL) { |
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| 317 | node = bdd_bdd_ith_var(bddManager, bddID); |
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| 318 | |
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| 319 | current = getAigOfBddAtState(network, node, i, initialState); |
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| 320 | next = getAigOfBddAtState(network, node, j, initialState); |
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| 321 | |
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| 322 | result = bAig_Or(aigManager, result, |
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| 323 | bAig_Not(bAig_Eq(aigManager, current, next))); |
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| 324 | } |
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| 325 | aigFunction = bAig_And(aigManager, aigFunction, result); |
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| 326 | } |
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| 327 | } |
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| 328 | |
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| 329 | return aigFunction; |
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| 330 | |
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| 331 | } /* BmcCirCUsAutCreateAigForSimplePath */ |
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| 332 | |
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| 333 | /**Function******************************************************************** |
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| 334 | |
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| 335 | Synopsis [Build AIG for a simple path in the composite model] |
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| 336 | |
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| 337 | Description [Build AIG a simple path in the composite mode starting from |
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| 338 | "fromState" and ending at "toState". If "initialState" = BMC_INITIAL_STATES, |
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| 339 | the the path starts from an initial state.] |
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| 340 | |
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| 341 | SideEffects [] |
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| 342 | |
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| 343 | SeeAlso [] |
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| 344 | |
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| 345 | ******************************************************************************/ |
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| 346 | bAigEdge_t |
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| 347 | BmcCirCUsCreateAigForSimpleCompositePath( |
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| 348 | Ntk_Network_t *network, |
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| 349 | bAig_Manager_t *aigManager, |
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| 350 | Ltl_Automaton_t *automaton, |
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| 351 | int fromState, |
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| 352 | int toState, |
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| 353 | st_table *nodeToMvfAigTable, |
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| 354 | st_table *coiIndexTable, |
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| 355 | int initialState) |
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| 356 | { |
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| 357 | int i, j, bddID; |
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| 358 | bAigEdge_t result, aigFunction, next, current; |
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| 359 | mdd_manager *bddManager = Ntk_NetworkReadMddManager(network); |
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| 360 | st_generator *stGen; |
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| 361 | |
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| 362 | bdd_node *node; |
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| 363 | |
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| 364 | |
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| 365 | |
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| 366 | /* |
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| 367 | Build a path in the original model |
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| 368 | */ |
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| 369 | bAig_ExpandTimeFrame(network, aigManager, toState+1, initialState); |
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| 370 | /* |
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| 371 | Build a path in the automaton |
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| 372 | */ |
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| 373 | aigFunction = BmcCirCUsAutCreateAigForPath(network, aigManager, automaton, |
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| 374 | fromState, toState, initialState); |
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| 375 | /* |
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| 376 | Constrains the two paths to be simple paths |
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| 377 | */ |
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| 378 | for(i = fromState + 1; i <= toState; i++){ |
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| 379 | for(j=fromState; j < i; j++){ |
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| 380 | result = bAig_Zero; |
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| 381 | |
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| 382 | /* |
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| 383 | Unique states in the automaton |
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| 384 | */ |
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| 385 | st_foreach_item(automaton->psNsTable, stGen, &bddID, NULL) { |
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| 386 | node = bdd_bdd_ith_var(bddManager, bddID); |
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| 387 | |
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| 388 | current = BmcCirCUsBdd2Aig(network, bdd_construct_bdd_t(bddManager, node), i, -1, |
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| 389 | automaton, aigManager, |
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| 390 | initialState); |
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| 391 | next = BmcCirCUsBdd2Aig(network, bdd_construct_bdd_t(bddManager,node), j, -1, |
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| 392 | automaton, aigManager, |
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| 393 | initialState); |
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| 394 | /* |
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| 395 | next = BmcCirCUsBdd2Aig(network, bdd_construct_bdd_t(bddManager,node), i, j, |
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| 396 | automaton, aigManager, |
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| 397 | initialState); |
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| 398 | |
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| 399 | result = bAig_Or(aigManager, result, |
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| 400 | bAig_Not(next)); |
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| 401 | */ |
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| 402 | result = bAig_Or(aigManager, result, |
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| 403 | bAig_Not(bAig_Eq(aigManager, current, next))); |
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| 404 | } |
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| 405 | /* |
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| 406 | Unique states in the original model |
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| 407 | */ |
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| 408 | result = bAig_Or(aigManager, result, |
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| 409 | bAig_Not(BmcCirCUsConnectFromStateToState(network, i-1, j, |
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| 410 | nodeToMvfAigTable, |
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| 411 | coiIndexTable, |
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| 412 | initialState))); |
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| 413 | aigFunction = bAig_And(aigManager, aigFunction, result); |
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| 414 | } |
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| 415 | } |
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| 416 | |
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| 417 | return aigFunction; |
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| 418 | |
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| 419 | } /* BmcCirCUsCreateAigForSimpleCompositePath */ |
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| 420 | |
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| 421 | |
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| 422 | |
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| 423 | /**Function******************************************************************** |
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| 424 | |
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| 425 | Synopsis [Verify the general LTL formula passes by applying the |
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| 426 | termination criteria that are described in the paper "Proving More |
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| 427 | Properties with Bounded Model Checking"] |
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| 428 | |
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| 429 | Description [Check for the termination on the composition of the |
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| 430 | automaton that describes the negation of the LTL formula and the |
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| 431 | model. We apply the termination criteria as described in the paper |
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| 432 | "Proving More Properties with Bounded Model Checking".] |
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| 433 | |
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| 434 | Return value: |
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| 435 | 0 no action |
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| 436 | 1 (m+n-1) <= options->maxK. If no counterexample of length up to (m+n-1), |
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| 437 | the property passes |
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| 438 | 2 (m+n-1) > options->maxK The property is undecided if no counterexample |
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| 439 | of length <= options->maxK. |
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| 440 | 3 Pass by early termination |
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| 441 | |
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| 442 | SideEffects [] |
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| 443 | |
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| 444 | SeeAlso [] |
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| 445 | |
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| 446 | ******************************************************************************/ |
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| 447 | void |
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| 448 | BmcCirCUsAutLtlCheckForTermination( |
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| 449 | Ntk_Network_t *network, |
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| 450 | bAig_Manager_t *aigManager, |
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| 451 | st_table *nodeToMvfAigTable, |
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| 452 | BmcCheckForTermination_t *terminationStatus, |
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| 453 | st_table *coiIndexTable, |
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| 454 | BmcOption_t *options) |
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| 455 | { |
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| 456 | long startTime, endTime; |
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| 457 | int k = terminationStatus->k; |
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| 458 | int returnStatus = 0; |
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| 459 | Ltl_Automaton_t *automaton = terminationStatus->automaton; |
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| 460 | Ctlsp_Formula_t *externalConstraints = terminationStatus->externalConstraints; |
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| 461 | satInterface_t *tInterface, *etInterface; |
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| 462 | bAigEdge_t autPath, property, tmp; |
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| 463 | array_t *objArray; |
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| 464 | array_t *previousResultArray; |
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| 465 | array_t *previousResultArrayWOI; |
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| 466 | |
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| 467 | /* |
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| 468 | If checkLevel == 0 --> check for beta' and beta'' only and if either UNSAT, m=k and chekLevel =1 |
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| 469 | If checkLevel == 1 --> check for beta only and if UNSAT, checkLevel = 2. |
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| 470 | If checkLevel == 2 --> check for alpha only and if UNSAT, n=k and checkLevel = 3. |
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| 471 | If gama is UNSAT up to (m+n-1) and checkLvel = 3, formula passes. |
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| 472 | checkLevel = 4 if (m+n-1) > maxK; |
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| 473 | */ |
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| 474 | startTime = util_cpu_ctime(); |
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| 475 | |
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| 476 | etInterface = 0; |
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| 477 | tInterface = 0; |
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| 478 | /* |
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| 479 | Hold objects |
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| 480 | */ |
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| 481 | objArray = array_alloc(bAigEdge_t, 2); |
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| 482 | |
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| 483 | previousResultArray = array_alloc(bAigEdge_t, 0); |
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| 484 | previousResultArrayWOI = array_alloc(bAigEdge_t, 0); |
---|
| 485 | |
---|
| 486 | /* =========================== |
---|
| 487 | Early termination condition |
---|
| 488 | =========================== |
---|
| 489 | */ |
---|
| 490 | if (options->earlyTermination) { |
---|
| 491 | if (options->verbosityLevel == BmcVerbosityMax_c) { |
---|
| 492 | (void) fprintf(vis_stdout, "\nChecking the early termination at k= %d\n", k); |
---|
| 493 | } |
---|
| 494 | |
---|
| 495 | autPath = BmcCirCUsCreateAigForSimpleCompositePath(network, aigManager, automaton, |
---|
| 496 | 0, k, nodeToMvfAigTable, |
---|
| 497 | coiIndexTable, |
---|
| 498 | BMC_INITIAL_STATES); |
---|
| 499 | array_insert(bAigEdge_t, objArray, 0, autPath); |
---|
| 500 | array_insert(bAigEdge_t, objArray, 1, bAig_One); |
---|
| 501 | options->cnfPrefix = k; |
---|
| 502 | etInterface = BmcCirCUsInterfaceWithObjArr(aigManager, network, objArray, |
---|
| 503 | previousResultArray, options, etInterface); |
---|
| 504 | |
---|
| 505 | if(etInterface->status == SAT_UNSAT){ |
---|
| 506 | (void) fprintf(vis_stdout, "# BMC: by early termination\n"); |
---|
| 507 | terminationStatus->action = 3; |
---|
| 508 | return; |
---|
| 509 | } |
---|
| 510 | } /* Early termination */ |
---|
| 511 | if((!automaton->fairSets) && |
---|
| 512 | (terminationStatus->checkLevel == 0)) { |
---|
| 513 | /* |
---|
| 514 | All the automaton states are fair states. So, beta' and beta are always UNSAT. |
---|
| 515 | */ |
---|
| 516 | terminationStatus->m = 0; |
---|
| 517 | printf("Value of m = %d\n", terminationStatus->m); |
---|
| 518 | terminationStatus->checkLevel = 2; |
---|
| 519 | } |
---|
| 520 | |
---|
| 521 | /* |
---|
| 522 | Check \beta''(k) |
---|
| 523 | */ |
---|
| 524 | if(terminationStatus->checkLevel == 0){ |
---|
| 525 | int i; |
---|
| 526 | |
---|
| 527 | if (options->verbosityLevel == BmcVerbosityMax_c) { |
---|
| 528 | (void) fprintf(vis_stdout, "# BMC: Check Beta''\n"); |
---|
| 529 | } |
---|
| 530 | autPath = BmcCirCUsCreateAigForSimpleCompositePath(network, aigManager, automaton, |
---|
| 531 | 0, k+1, nodeToMvfAigTable, |
---|
| 532 | coiIndexTable, BMC_NO_INITIAL_STATES); |
---|
| 533 | property = bAig_One; |
---|
| 534 | for(i=1; i<=k+1; i++){ |
---|
| 535 | tmp = BmcCirCUsBdd2Aig(network, automaton->fairSets, i, -1, |
---|
| 536 | automaton, aigManager, |
---|
| 537 | BMC_NO_INITIAL_STATES); |
---|
| 538 | |
---|
| 539 | if(externalConstraints){ |
---|
| 540 | tmp = bAig_Or(aigManager, tmp, |
---|
| 541 | BmcCirCUsCreatebAigOfPropFormula(network, aigManager, i, |
---|
| 542 | externalConstraints, |
---|
| 543 | BMC_NO_INITIAL_STATES)); |
---|
| 544 | } |
---|
| 545 | property = bAig_And(aigManager, property, bAig_Not(tmp)); |
---|
| 546 | } |
---|
| 547 | |
---|
| 548 | tmp = BmcCirCUsBdd2Aig(network, automaton->fairSets, 0, -1, |
---|
| 549 | automaton, aigManager, BMC_NO_INITIAL_STATES); |
---|
| 550 | if(externalConstraints){ |
---|
| 551 | tmp = bAig_Or(aigManager, tmp, |
---|
| 552 | BmcCirCUsCreatebAigOfPropFormula(network, aigManager, 0, |
---|
| 553 | externalConstraints, |
---|
| 554 | BMC_NO_INITIAL_STATES)); |
---|
| 555 | } |
---|
| 556 | property = bAig_And(aigManager, property, tmp); |
---|
| 557 | |
---|
| 558 | options->cnfPrefix = k+1; |
---|
| 559 | array_insert(bAigEdge_t, objArray, 0, property); |
---|
| 560 | array_insert(bAigEdge_t, objArray, 1, autPath); |
---|
| 561 | tInterface = BmcCirCUsInterfaceWithObjArr(aigManager, network, objArray, |
---|
| 562 | previousResultArray, options, tInterface); |
---|
| 563 | if(tInterface->status == SAT_UNSAT){ |
---|
| 564 | terminationStatus->m = k; |
---|
| 565 | (void)fprintf(vis_stderr,"m = %d\n", terminationStatus->m); |
---|
| 566 | terminationStatus->checkLevel = 1; |
---|
| 567 | } |
---|
| 568 | } /* Check for Beta'' */ |
---|
| 569 | |
---|
| 570 | /* |
---|
| 571 | Check \beta'(k) |
---|
| 572 | */ |
---|
| 573 | if(terminationStatus->checkLevel == 0){ |
---|
| 574 | int i; |
---|
| 575 | |
---|
| 576 | if (options->verbosityLevel == BmcVerbosityMax_c) { |
---|
| 577 | (void) fprintf(vis_stdout, "# BMC: Check Beta'\n"); |
---|
| 578 | } |
---|
| 579 | autPath = BmcCirCUsCreateAigForSimpleCompositePath(network, aigManager, automaton, |
---|
| 580 | 0, k+1, nodeToMvfAigTable, |
---|
| 581 | coiIndexTable, BMC_NO_INITIAL_STATES); |
---|
| 582 | property = bAig_One; |
---|
| 583 | for(i=0; i<=k; i++){ |
---|
| 584 | tmp = BmcCirCUsBdd2Aig(network, automaton->fairSets, i, -1, |
---|
| 585 | automaton, aigManager, |
---|
| 586 | BMC_NO_INITIAL_STATES); |
---|
| 587 | if(externalConstraints){ |
---|
| 588 | tmp = bAig_Or(aigManager, tmp, |
---|
| 589 | BmcCirCUsCreatebAigOfPropFormula(network, aigManager, i, |
---|
| 590 | externalConstraints, |
---|
| 591 | BMC_NO_INITIAL_STATES)); |
---|
| 592 | } |
---|
| 593 | property = bAig_And(aigManager, property, bAig_Not(tmp)); |
---|
| 594 | } |
---|
| 595 | tmp = BmcCirCUsBdd2Aig(network, automaton->fairSets, k+1, -1, |
---|
| 596 | automaton, aigManager, |
---|
| 597 | BMC_NO_INITIAL_STATES); |
---|
| 598 | if(externalConstraints){ |
---|
| 599 | tmp = bAig_Or(aigManager, tmp, |
---|
| 600 | BmcCirCUsCreatebAigOfPropFormula(network, aigManager, k+1, |
---|
| 601 | externalConstraints, |
---|
| 602 | BMC_NO_INITIAL_STATES)); |
---|
| 603 | } |
---|
| 604 | property = bAig_And(aigManager, property, tmp); |
---|
| 605 | |
---|
| 606 | options->cnfPrefix = k+1; |
---|
| 607 | array_insert(bAigEdge_t, objArray, 0, property); |
---|
| 608 | array_insert(bAigEdge_t, objArray, 1, autPath); |
---|
| 609 | tInterface = BmcCirCUsInterfaceWithObjArr(aigManager, network, objArray, |
---|
| 610 | previousResultArray, options, tInterface); |
---|
| 611 | if(tInterface->status == SAT_UNSAT){ |
---|
| 612 | terminationStatus->m = k; |
---|
| 613 | (void)fprintf(vis_stderr,"m = %d\n", terminationStatus->m); |
---|
| 614 | terminationStatus->checkLevel = 1; |
---|
| 615 | } |
---|
| 616 | } /* Check for Beta' */ |
---|
| 617 | |
---|
| 618 | /* |
---|
| 619 | Check for Beta. |
---|
| 620 | */ |
---|
| 621 | if(terminationStatus->checkLevel == 1){ |
---|
| 622 | |
---|
| 623 | if (options->verbosityLevel == BmcVerbosityMax_c) { |
---|
| 624 | (void) fprintf(vis_stdout, "# BMC: Check Beta\n"); |
---|
| 625 | } |
---|
| 626 | autPath = BmcCirCUsCreateAigForSimpleCompositePath(network, aigManager, automaton, |
---|
| 627 | 0, k+1, nodeToMvfAigTable, |
---|
| 628 | coiIndexTable, BMC_NO_INITIAL_STATES); |
---|
| 629 | property = bAig_One; |
---|
| 630 | |
---|
| 631 | tmp = BmcCirCUsBdd2Aig(network, automaton->fairSets, k, -1, |
---|
| 632 | automaton, aigManager, BMC_NO_INITIAL_STATES); |
---|
| 633 | |
---|
| 634 | if(externalConstraints){ |
---|
| 635 | tmp = bAig_Or(aigManager, tmp, |
---|
| 636 | BmcCirCUsCreatebAigOfPropFormula(network, aigManager, k, |
---|
| 637 | externalConstraints, |
---|
| 638 | BMC_NO_INITIAL_STATES)); |
---|
| 639 | } |
---|
| 640 | property = bAig_And(aigManager, property, bAig_Not(tmp)); |
---|
| 641 | |
---|
| 642 | tmp = BmcCirCUsBdd2Aig(network, automaton->fairSets, k+1, -1, |
---|
| 643 | automaton, aigManager, BMC_NO_INITIAL_STATES); |
---|
| 644 | if(externalConstraints){ |
---|
| 645 | tmp = bAig_Or(aigManager, tmp, |
---|
| 646 | BmcCirCUsCreatebAigOfPropFormula(network, aigManager, k+1, |
---|
| 647 | externalConstraints, |
---|
| 648 | BMC_NO_INITIAL_STATES)); |
---|
| 649 | } |
---|
| 650 | property = bAig_And(aigManager, property, tmp); |
---|
| 651 | |
---|
| 652 | options->cnfPrefix = k+1; |
---|
| 653 | array_insert(bAigEdge_t, objArray, 0, property); |
---|
| 654 | array_insert(bAigEdge_t, objArray, 1, autPath); |
---|
| 655 | tInterface = BmcCirCUsInterfaceWithObjArr(aigManager, network, objArray, |
---|
| 656 | previousResultArray, options, tInterface); |
---|
| 657 | if(tInterface->status == SAT_UNSAT){ |
---|
| 658 | terminationStatus->checkLevel = 2; |
---|
| 659 | } |
---|
| 660 | } /* Check Beta*/ |
---|
| 661 | |
---|
| 662 | if(terminationStatus->checkLevel == 2){ /* we check Alpha if Beta is unsatisfiable */ |
---|
| 663 | |
---|
| 664 | if (options->verbosityLevel == BmcVerbosityMax_c) { |
---|
| 665 | (void) fprintf(vis_stdout, "# BMC: Check Alpha \n"); |
---|
| 666 | } |
---|
| 667 | autPath = BmcCirCUsCreateAigForSimpleCompositePath(network, aigManager, automaton, |
---|
| 668 | 0, k, nodeToMvfAigTable, |
---|
| 669 | coiIndexTable, |
---|
| 670 | BMC_INITIAL_STATES); |
---|
| 671 | array_insert(bAigEdge_t, objArray, 1, bAig_One); |
---|
| 672 | property = bAig_Zero; |
---|
| 673 | if(automaton->fairSets){ |
---|
| 674 | property = BmcCirCUsBdd2Aig(network, automaton->fairSets, k, -1, |
---|
| 675 | automaton, aigManager, BMC_INITIAL_STATES); |
---|
| 676 | array_insert(bAigEdge_t, objArray, 1, property); |
---|
| 677 | } |
---|
| 678 | if(externalConstraints){ |
---|
| 679 | property = bAig_Or(aigManager, property, |
---|
| 680 | BmcCirCUsCreatebAigOfPropFormula(network, aigManager, k, |
---|
| 681 | externalConstraints, |
---|
| 682 | BMC_INITIAL_STATES)); |
---|
| 683 | array_insert(bAigEdge_t, objArray, 1, property); |
---|
| 684 | } |
---|
| 685 | options->cnfPrefix = k; |
---|
| 686 | array_insert(bAigEdge_t, objArray, 0, autPath); |
---|
| 687 | tInterface = 0; |
---|
| 688 | tInterface = BmcCirCUsInterfaceWithObjArr(aigManager, network, |
---|
| 689 | objArray, previousResultArray, |
---|
| 690 | options, tInterface); |
---|
| 691 | if(tInterface->status == SAT_UNSAT){ |
---|
| 692 | terminationStatus->n = k; |
---|
| 693 | terminationStatus->checkLevel = 3; |
---|
| 694 | (void)fprintf(vis_stdout,"Value of m=%d n=%d\n",terminationStatus->m,terminationStatus->n); |
---|
| 695 | if ((terminationStatus->m+terminationStatus->n-1) <= options->maxK){ |
---|
| 696 | terminationStatus->k = terminationStatus->m+terminationStatus->n-1; |
---|
| 697 | if(k==0){ |
---|
| 698 | /* |
---|
| 699 | By induction, the property passes. |
---|
| 700 | */ |
---|
| 701 | terminationStatus->k = 0; |
---|
| 702 | } |
---|
| 703 | returnStatus = 1; |
---|
| 704 | } else { |
---|
| 705 | terminationStatus->checkLevel = 4; |
---|
| 706 | returnStatus = 2; |
---|
| 707 | } |
---|
| 708 | } |
---|
| 709 | }/* Chek for Alpha */ |
---|
| 710 | |
---|
| 711 | if (options->verbosityLevel != BmcVerbosityNone_c) { |
---|
| 712 | endTime = util_cpu_ctime(); |
---|
| 713 | fprintf(vis_stdout, "-- Check for termination time time = %10g\n", |
---|
| 714 | (double)(endTime - startTime) / 1000.0); |
---|
| 715 | } |
---|
| 716 | |
---|
| 717 | terminationStatus->action = returnStatus; |
---|
| 718 | |
---|
| 719 | } /* BmcAutLtlCheckForTermination */ |
---|
| 720 | |
---|
| 721 | |
---|
| 722 | /**Function******************************************************************** |
---|
| 723 | |
---|
| 724 | Synopsis [Call CirCUs SAT solver on a CNF file] |
---|
| 725 | |
---|
| 726 | Description [Call CirCUs SAT solver on a CNF file. We use CirCUs as |
---|
| 727 | CNF SAT solver. The function returns a file name that contains the |
---|
| 728 | assignment if the set of clauses are satisfiable. |
---|
| 729 | ] |
---|
| 730 | |
---|
| 731 | SideEffects [] |
---|
| 732 | |
---|
| 733 | ******************************************************************************/ |
---|
| 734 | char * |
---|
| 735 | BmcCirCUsCallCirCUs( |
---|
| 736 | BmcOption_t *options) |
---|
| 737 | { |
---|
| 738 | satOption_t *satOption; |
---|
| 739 | satManager_t *cm; |
---|
| 740 | int maxSize; |
---|
| 741 | char *fileName = NIL(char); |
---|
| 742 | |
---|
| 743 | satOption = sat_InitOption(); |
---|
| 744 | satOption->verbose = options->verbosityLevel-1; |
---|
| 745 | |
---|
| 746 | cm = sat_InitManager(0); |
---|
| 747 | cm->comment = ALLOC(char, 2); |
---|
| 748 | cm->comment[0] = ' '; |
---|
| 749 | cm->comment[1] = '\0'; |
---|
| 750 | cm->stdOut = stdout; |
---|
| 751 | cm->stdErr = stderr; |
---|
| 752 | |
---|
| 753 | cm->option = satOption; |
---|
| 754 | cm->each = sat_InitStatistics(); |
---|
| 755 | |
---|
| 756 | cm->unitLits = sat_ArrayAlloc(16); |
---|
| 757 | cm->pureLits = sat_ArrayAlloc(16); |
---|
| 758 | |
---|
| 759 | maxSize = 10000 << 8; |
---|
| 760 | cm->nodesArray = ALLOC(bAigEdge_t, maxSize); |
---|
| 761 | cm->maxNodesArraySize = maxSize; |
---|
| 762 | cm->nodesArraySize = satNodeSize; |
---|
| 763 | |
---|
| 764 | sat_AllocLiteralsDB(cm); |
---|
| 765 | |
---|
| 766 | sat_ReadCNF(cm, options->satInFile); |
---|
| 767 | |
---|
| 768 | if (options->verbosityLevel == BmcVerbosityMax_c) { |
---|
| 769 | (void)fprintf(vis_stdout,"Calling SAT solver (CirCUs) ..."); |
---|
| 770 | (void) fflush(vis_stdout); |
---|
| 771 | } |
---|
| 772 | sat_Main(cm); |
---|
| 773 | if (options->verbosityLevel == BmcVerbosityMax_c) { |
---|
| 774 | (void) fprintf(vis_stdout," done "); |
---|
| 775 | (void) fprintf(vis_stdout, "(%g s)\n", cm->each->satTime); |
---|
| 776 | } |
---|
| 777 | if(cm->status == SAT_UNSAT) { |
---|
| 778 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 779 | (void) fprintf(vis_stdout, "# SAT: Counterexample not found\n"); |
---|
| 780 | |
---|
| 781 | } |
---|
| 782 | fflush(cm->stdOut); |
---|
| 783 | } else if(cm->status == SAT_SAT) { |
---|
| 784 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 785 | (void) fprintf(vis_stdout, "# SAT: Counterexample found\n"); |
---|
| 786 | } |
---|
| 787 | if (options->verbosityLevel > BmcVerbosityMax_c){ |
---|
| 788 | sat_ReportStatistics(cm, cm->each); |
---|
| 789 | } |
---|
| 790 | |
---|
| 791 | if(!(cm->stdOut = fopen(options->satOutFile, "w"))) { |
---|
| 792 | fprintf(stdout, "ERROR : Can't open file %s\n", options->satOutFile); |
---|
| 793 | cm->stdOut = stdout; |
---|
| 794 | cm->stdErr = stderr; |
---|
| 795 | } |
---|
| 796 | sat_PrintSatisfyingAssignment(cm); |
---|
| 797 | fileName = options->satOutFile; |
---|
| 798 | } |
---|
| 799 | sat_FreeManager(cm); |
---|
| 800 | |
---|
| 801 | return fileName; |
---|
| 802 | } /* BmcCallCirCUs */ |
---|
| 803 | |
---|
| 804 | /**Function******************************************************************** |
---|
| 805 | |
---|
| 806 | Synopsis [Check the satisfiability of CNF formula written in file] |
---|
| 807 | |
---|
| 808 | Description [Run external solver on a CNF file. The function returns |
---|
| 809 | a file name that contains the assignment if the set of clauses are |
---|
| 810 | satisfiable.] |
---|
| 811 | |
---|
| 812 | SideEffects [] |
---|
| 813 | |
---|
| 814 | ******************************************************************************/ |
---|
| 815 | char * |
---|
| 816 | BmcCirCUsCallCusp(BmcOption_t *options) |
---|
| 817 | { |
---|
| 818 | FILE *fp; |
---|
| 819 | static char parseBuffer[1024]; |
---|
| 820 | int satStatus; |
---|
| 821 | char line[MAX_LENGTH]; |
---|
| 822 | int num = 0; |
---|
| 823 | array_t *result = NIL(array_t); |
---|
| 824 | char *tmpStr, *tmpStr1, *tmpStr2; |
---|
| 825 | long solverStart; |
---|
| 826 | int satTimeOutPeriod = 0; |
---|
| 827 | char *fileName = NIL(char); |
---|
| 828 | |
---|
| 829 | /* |
---|
| 830 | Prepare to call external CNF SAT solver |
---|
| 831 | */ |
---|
| 832 | strcpy(parseBuffer,"cusp -distill -velim -cnf "); |
---|
| 833 | options->satSolverError = FALSE; /* assume no error */ |
---|
| 834 | if (options->timeOutPeriod > 0) { |
---|
| 835 | /* Compute the residual CPU time and subtract a little time to |
---|
| 836 | give vis a chance to clean up before its own time out expires. |
---|
| 837 | */ |
---|
| 838 | satTimeOutPeriod = options->timeOutPeriod - 1 - |
---|
| 839 | (util_cpu_ctime() - options->startTime) / 1000; |
---|
| 840 | if (satTimeOutPeriod <= 0){ /* no time left to run SAT solver */ |
---|
| 841 | options->satSolverError=TRUE; |
---|
| 842 | return NIL(char); |
---|
| 843 | } |
---|
| 844 | tmpStr2 = util_inttostr(satTimeOutPeriod); |
---|
| 845 | tmpStr1 = util_strcat3(options->satInFile," -t ", tmpStr2); |
---|
| 846 | tmpStr = util_strcat3(tmpStr1, " >", options->satOutFile); |
---|
| 847 | FREE(tmpStr1); |
---|
| 848 | FREE(tmpStr2); |
---|
| 849 | } else { |
---|
| 850 | tmpStr = util_strcat3(options->satInFile, " >", options->satOutFile); |
---|
| 851 | } |
---|
| 852 | strcat(parseBuffer, tmpStr); |
---|
| 853 | FREE(tmpStr); |
---|
| 854 | |
---|
| 855 | if (options->verbosityLevel == BmcVerbosityMax_c) { |
---|
| 856 | (void)fprintf(vis_stdout,"Calling SAT solver (cusp) ..."); |
---|
| 857 | (void) fflush(vis_stdout); |
---|
| 858 | solverStart = util_cpu_ctime(); |
---|
| 859 | } else { /* to remove uninitialized variables warning */ |
---|
| 860 | solverStart = 0; |
---|
| 861 | } |
---|
| 862 | /* Call Sat Solver */ |
---|
| 863 | satStatus = system(parseBuffer); |
---|
| 864 | if (satStatus != 0){ |
---|
| 865 | (void) fprintf(vis_stderr, "Can't run external sat solver. It may not be in your path. Status = %d\n", satStatus); |
---|
| 866 | options->satSolverError = TRUE; |
---|
| 867 | return NIL(char); |
---|
| 868 | } |
---|
| 869 | |
---|
| 870 | if (options->verbosityLevel == BmcVerbosityMax_c) { |
---|
| 871 | (void) fprintf(vis_stdout," done "); |
---|
| 872 | (void) fprintf(vis_stdout, "(%g s)\n", |
---|
| 873 | (double) (util_cpu_ctime() - solverStart)/1000.0); |
---|
| 874 | } |
---|
| 875 | fp = Cmd_FileOpen(options->satOutFile, "r", NIL(char *), 0); |
---|
| 876 | if (fp == NIL(FILE)) { |
---|
| 877 | (void) fprintf(vis_stderr, "** bmc error: Cannot open the file %s\n", |
---|
| 878 | options->satOutFile); |
---|
| 879 | options->satSolverError = TRUE; |
---|
| 880 | return NIL(char); |
---|
| 881 | } |
---|
| 882 | /* Skip the lines until the result */ |
---|
| 883 | while(1) { |
---|
| 884 | if (fgets(line, MAX_LENGTH - 1, fp) == NULL) break; |
---|
| 885 | if(strstr(line,"UNSATISFIABLE") || |
---|
| 886 | strstr(line,"SATISFIABLE") || |
---|
| 887 | strstr(line,"MEMOUT") || |
---|
| 888 | strstr(line,"TIMEOUT")) |
---|
| 889 | break; |
---|
| 890 | } |
---|
| 891 | |
---|
| 892 | if(strstr(line,"UNSATISFIABLE") != NIL(char)) { |
---|
| 893 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 894 | (void) fprintf(vis_stdout, "# SAT: Counterexample not found\n"); |
---|
| 895 | |
---|
| 896 | } |
---|
| 897 | } else if(strstr(line,"SATISFIABLE") != NIL(char)) { |
---|
| 898 | if (options->verbosityLevel != BmcVerbosityNone_c){ |
---|
| 899 | (void) fprintf(vis_stdout, "# SAT: Counterexample found\n"); |
---|
| 900 | } |
---|
| 901 | /* Skip the initial v of the result line */ |
---|
| 902 | result = array_alloc(int, 0); |
---|
| 903 | while (fgets(line, MAX_LENGTH - 1, fp) != NULL) { |
---|
| 904 | char *word; |
---|
| 905 | if (line[0] != 'v') { |
---|
| 906 | (void) fprintf(vis_stderr, |
---|
| 907 | "** bmc error: Cannot find assignment in file %s\n", |
---|
| 908 | options->satOutFile); |
---|
| 909 | options->satSolverError = TRUE; |
---|
| 910 | return NIL(char); |
---|
| 911 | } |
---|
| 912 | word = strtok(&(line[1])," \n"); |
---|
| 913 | while (word != NIL(char)) { |
---|
| 914 | num = atoi(word); |
---|
| 915 | if (num == 0) break; |
---|
| 916 | array_insert_last(int, result, num); |
---|
| 917 | word = strtok(NIL(char)," \n"); |
---|
| 918 | } |
---|
| 919 | if (num == 0) break; |
---|
| 920 | } |
---|
| 921 | (void) fclose(fp); |
---|
| 922 | fp = Cmd_FileOpen(options->satOutFile, "w", NIL(char *), 0); |
---|
| 923 | for(num=0; num < array_n(result); num++){ |
---|
| 924 | fprintf(fp,"%d ", array_fetch(int, result, num)); |
---|
| 925 | if(((num+1) %10) == 0){ |
---|
| 926 | fprintf(fp,"\n"); |
---|
| 927 | } |
---|
| 928 | } |
---|
| 929 | array_free(result); |
---|
| 930 | (void) fclose(fp); |
---|
| 931 | fileName = options->satOutFile; |
---|
| 932 | } else if(strstr(line,"MEMOUT") != NIL(char)) { |
---|
| 933 | (void) fprintf(vis_stdout,"# SAT: SAT Solver Memory out\n"); |
---|
| 934 | options->satSolverError = TRUE; |
---|
| 935 | } else if(strstr(line,"TIMEOUT") != NIL(char)) { |
---|
| 936 | (void) fprintf(vis_stdout, |
---|
| 937 | "# SAT: SAT Solver Time out occurred after %d seconds.\n", |
---|
| 938 | satTimeOutPeriod); |
---|
| 939 | options->satSolverError = TRUE; |
---|
| 940 | } else { |
---|
| 941 | (void) fprintf(vis_stdout, "# SAT: SAT Solver failed, try again\n"); |
---|
| 942 | options->satSolverError = TRUE; |
---|
| 943 | } |
---|
| 944 | (void) fflush(vis_stdout); |
---|
| 945 | |
---|
| 946 | return fileName; |
---|
| 947 | } /* BmcCirCUsCallCusp */ |
---|
| 948 | |
---|
| 949 | |
---|
| 950 | /*---------------------------------------------------------------------------*/ |
---|
| 951 | /* Definition of static functions */ |
---|
| 952 | /*---------------------------------------------------------------------------*/ |
---|
| 953 | |
---|
| 954 | /**Function******************************************************************** |
---|
| 955 | |
---|
| 956 | Synopsis [retun the name of bdd node] |
---|
| 957 | |
---|
| 958 | Description [return the name of bdd node. If the bdd is for a |
---|
| 959 | multi-valued variable, then its name will be the name of the |
---|
| 960 | multi-valued variable concatenated with its index. It is the user |
---|
| 961 | responsibility to free the returned name] |
---|
| 962 | |
---|
| 963 | SideEffects [] |
---|
| 964 | |
---|
| 965 | ******************************************************************************/ |
---|
| 966 | static char * |
---|
| 967 | getBddName( |
---|
| 968 | bdd_manager *bddManager, |
---|
| 969 | bdd_node *node) |
---|
| 970 | { |
---|
| 971 | array_t *mvar_list = mdd_ret_mvar_list(bddManager); |
---|
| 972 | array_t *bvar_list = mdd_ret_bvar_list(bddManager); |
---|
| 973 | char name[100]; |
---|
| 974 | bvar_type bv; |
---|
| 975 | mvar_type mv; |
---|
| 976 | int nodeIndex = bdd_node_read_index(node); |
---|
| 977 | int index, rtnNodeIndex; |
---|
| 978 | |
---|
| 979 | /* |
---|
| 980 | If the node is for a multi-valued varaible. |
---|
| 981 | */ |
---|
| 982 | if (nodeIndex < array_n(bvar_list)){ |
---|
| 983 | bv = array_fetch(bvar_type, bvar_list, nodeIndex); |
---|
| 984 | /* |
---|
| 985 | get the multi-valued varaible. |
---|
| 986 | */ |
---|
| 987 | mv = array_fetch(mvar_type, mvar_list, bv.mvar_id); |
---|
| 988 | arrayForEachItem(int, mv.bvars, index, rtnNodeIndex) { |
---|
| 989 | if (nodeIndex == rtnNodeIndex){ |
---|
| 990 | break; |
---|
| 991 | } |
---|
| 992 | } |
---|
| 993 | assert(index < mv.encode_length); |
---|
| 994 | sprintf(name, "%s_%d", mv.name, index); |
---|
| 995 | } else { |
---|
| 996 | sprintf(name, "Bdd_%d", nodeIndex); |
---|
| 997 | } |
---|
| 998 | return util_strsav(name); |
---|
| 999 | } |
---|
| 1000 | |
---|
| 1001 | /**Function******************************************************************** |
---|
| 1002 | |
---|
| 1003 | Synopsis [] |
---|
| 1004 | |
---|
| 1005 | Description [] |
---|
| 1006 | |
---|
| 1007 | SideEffects [] |
---|
| 1008 | |
---|
| 1009 | ******************************************************************************/ |
---|
| 1010 | static bAigEdge_t |
---|
| 1011 | getAigAtTimeFrame( |
---|
| 1012 | bAig_Manager_t *manager, |
---|
| 1013 | bAigEdge_t node, |
---|
| 1014 | int i, |
---|
| 1015 | int withInitialState) |
---|
| 1016 | { |
---|
| 1017 | bAigTimeFrame_t *timeframe; |
---|
| 1018 | bAigEdge_t result, *li; |
---|
| 1019 | int index; |
---|
| 1020 | |
---|
| 1021 | result = bAig_NULL; |
---|
| 1022 | |
---|
| 1023 | if(withInitialState) timeframe = manager->timeframe; |
---|
| 1024 | else timeframe = manager->timeframeWOI; |
---|
| 1025 | |
---|
| 1026 | if(st_lookup_int(timeframe->li2index, (char *)node, &index)) { |
---|
| 1027 | li = timeframe->latchInputs[i]; |
---|
| 1028 | result = bAig_GetCanonical(manager, li[index]); |
---|
| 1029 | } |
---|
| 1030 | else if(st_lookup_int(timeframe->o2index, (char *)node, &index)) { |
---|
| 1031 | li = timeframe->outputs[i]; |
---|
| 1032 | result = bAig_GetCanonical(manager, li[index]); |
---|
| 1033 | } |
---|
| 1034 | else if(st_lookup_int(timeframe->i2index, (char *)node, &index)) { |
---|
| 1035 | li = timeframe->internals[i]; |
---|
| 1036 | result = bAig_GetCanonical(manager, li[index]); |
---|
| 1037 | } |
---|
| 1038 | else if(st_lookup_int(timeframe->bli2index, (char *)node, &index)) { |
---|
| 1039 | li = timeframe->blatchInputs[i]; |
---|
| 1040 | result = bAig_GetCanonical(manager, li[index]); |
---|
| 1041 | } |
---|
| 1042 | else if(st_lookup_int(timeframe->bpi2index, (char *)node, &index)) { |
---|
| 1043 | li = timeframe->binputs[i]; |
---|
| 1044 | result = bAig_GetCanonical(manager, li[index]); |
---|
| 1045 | } |
---|
| 1046 | return result; |
---|
| 1047 | } |
---|
| 1048 | |
---|
| 1049 | /**Function******************************************************************** |
---|
| 1050 | |
---|
| 1051 | Synopsis [Get the AIG node corresponding to a BDD node at a given state] |
---|
| 1052 | |
---|
| 1053 | Description [We use BDD name to get the corresponding AIG node. If no AIG node |
---|
| 1054 | exists, we create one] |
---|
| 1055 | |
---|
| 1056 | SideEffects [] |
---|
| 1057 | |
---|
| 1058 | SeeAlso [] |
---|
| 1059 | |
---|
| 1060 | ******************************************************************************/ |
---|
| 1061 | static bAigEdge_t |
---|
| 1062 | getAigOfBddAtState( |
---|
| 1063 | Ntk_Network_t *network, |
---|
| 1064 | bdd_node *node, |
---|
| 1065 | int state, |
---|
| 1066 | int withInitialState) |
---|
| 1067 | { |
---|
| 1068 | mdd_manager *bddManager = Ntk_NetworkReadMddManager(network); |
---|
| 1069 | mAig_Manager_t *aigManager = Ntk_NetworkReadMAigManager(network); |
---|
| 1070 | |
---|
| 1071 | char *nodeName, *nameKey; |
---|
| 1072 | char tmpName[100]; |
---|
| 1073 | bAigEdge_t aigNode, rtnAig; |
---|
| 1074 | |
---|
| 1075 | nodeName = getBddName(bddManager, bdd_regular(node)); |
---|
| 1076 | aigNode = bAig_FindNodeByName(aigManager, nodeName); |
---|
| 1077 | if(aigNode == bAig_NULL){ |
---|
| 1078 | sprintf(tmpName, "%s_%d_%d", nodeName, withInitialState, state); |
---|
| 1079 | nameKey = util_strsav(tmpName); |
---|
| 1080 | aigNode = bAig_FindNodeByName(aigManager, nameKey); |
---|
| 1081 | if(aigNode == bAig_NULL){ |
---|
| 1082 | aigNode = bAig_CreateVarNode(aigManager, nameKey); |
---|
| 1083 | } else { |
---|
| 1084 | FREE(nameKey); |
---|
| 1085 | } |
---|
| 1086 | rtnAig = aigNode; |
---|
| 1087 | } else { |
---|
| 1088 | aigNode = bAig_GetCanonical(aigManager, aigNode); |
---|
| 1089 | rtnAig = getAigAtTimeFrame(aigManager, aigNode, state, withInitialState); |
---|
| 1090 | if(rtnAig == bAig_NULL){ |
---|
| 1091 | rtnAig = bAig_CreateNode(aigManager, bAig_NULL, bAig_NULL); |
---|
| 1092 | } |
---|
| 1093 | } |
---|
| 1094 | return bAig_GetCanonical(aigManager, rtnAig); |
---|
| 1095 | } /* getAigOfBddAtState */ |
---|