[14] | 1 | /**CFile*********************************************************************** |
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| 2 | |
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| 3 | FileName [puresatAig.c] |
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| 4 | |
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| 5 | PackageName [puresat] |
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| 6 | |
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| 7 | Synopsis [Abstraction refinement for large scale invariant checking.] |
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| 8 | |
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| 9 | Description [This file contains the functions to check invariant properties |
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| 10 | by the PureSAT abstraction refinement algorithm, which is entirely based on |
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| 11 | SAT solver, the input of which could be either CNF or AIG. It has several |
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| 12 | parts: |
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| 13 | |
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| 14 | * Localization-reduction base Abstraction |
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| 15 | * K-induction or interpolation to prove the truth of a property |
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| 16 | * Bounded Model Checking to find bugs |
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| 17 | * Incremental concretization based methods to verify abstract bugs |
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| 18 | * Incremental SAT solver to improve efficiency |
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| 19 | * UNSAT proof based method to obtain refinement |
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| 20 | * AROSAT to bring in only necessary latches into unsat proofs |
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| 21 | * Bridge abstraction to get compact coarse refinement |
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| 22 | * Refinement minization to guarrantee minimal refinements |
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| 23 | * Unsat proof-based refinement minimization to eliminate multiple candidate |
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| 24 | by on SAT test |
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| 25 | * Refinement prediction to decrease the number of refinement iterations |
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| 26 | * Dynamic switching to redistribute computional resources to improve |
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| 27 | efficiency |
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| 28 | |
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| 29 | For more information, please check the BMC'03, ICCAD'04, STTT'05 and TACAS'05 |
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| 30 | paper of Li et al., "A satisfiability-based appraoch to abstraction |
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| 31 | refinement in model checking", " Abstraction in symbolic model checking |
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| 32 | using satisfiability as the only decision procedure", "Efficient computation |
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| 33 | of small abstraction refinements", and "Efficient abstraction refinement in |
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| 34 | interpolation-based unbounded model checking"] |
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| 35 | |
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| 36 | Author [Bing Li] |
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| 37 | |
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| 38 | Copyright [Copyright (c) 2004 The Regents of the Univ. of Colorado. |
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| 39 | All rights reserved. |
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| 40 | |
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| 41 | Permission is hereby granted, without written agreement and without |
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| 42 | license or royalty fees, to use, copy, modify, and distribute this |
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| 43 | software and its documentation for any purpose, provided that the |
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| 44 | above copyright notice and the following two paragraphs appear in |
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| 45 | all copies of this software.] |
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| 46 | |
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| 47 | ******************************************************************************/ |
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| 48 | #include "maigInt.h" |
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| 49 | #include "baig.h" |
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| 50 | #include "ntk.h" |
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| 51 | #include "puresatInt.h" |
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| 52 | /*---------------------------------------------------------------------------*/ |
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| 53 | /* Constant declarations */ |
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| 54 | /*---------------------------------------------------------------------------*/ |
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| 55 | |
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| 56 | /*---------------------------------------------------------------------------*/ |
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| 57 | /* Type declarations */ |
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| 58 | /*---------------------------------------------------------------------------*/ |
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| 59 | |
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| 60 | |
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| 61 | /*---------------------------------------------------------------------------*/ |
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| 62 | /* Structure declarations */ |
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| 63 | /*---------------------------------------------------------------------------*/ |
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| 64 | |
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| 65 | |
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| 66 | /*---------------------------------------------------------------------------*/ |
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| 67 | /* Variable declarations */ |
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| 68 | /*---------------------------------------------------------------------------*/ |
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| 69 | |
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| 70 | /*---------------------------------------------------------------------------*/ |
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| 71 | /* Macro declarations */ |
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| 72 | /*---------------------------------------------------------------------------*/ |
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| 73 | |
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| 74 | /**AutomaticStart*************************************************************/ |
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| 75 | |
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| 76 | /*---------------------------------------------------------------------------*/ |
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| 77 | /* Static function prototypes */ |
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| 78 | /*---------------------------------------------------------------------------*/ |
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| 79 | |
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| 80 | |
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| 81 | /**AutomaticEnd***************************************************************/ |
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| 82 | |
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| 83 | /*---------------------------------------------------------------------------*/ |
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| 84 | /* Definition of exported functions */ |
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| 85 | /*---------------------------------------------------------------------------*/ |
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| 86 | |
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| 87 | |
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| 88 | /*---------------------------------------------------------------------------*/ |
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| 89 | /* Definition of internal functions */ |
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| 90 | /*---------------------------------------------------------------------------*/ |
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| 91 | |
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| 92 | /**Function******************************************************************** |
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| 93 | |
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| 94 | Synopsis [For AIG recovery--unconnect output for nodes eliminated] |
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| 95 | |
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| 96 | Description [For AIG recovery--unconnect output for nodes eliminated] |
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| 97 | |
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| 98 | SideEffects [] |
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| 99 | |
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| 100 | SeeAlso [] |
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| 101 | |
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| 102 | ******************************************************************************/ |
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| 103 | |
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| 104 | void |
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| 105 | PureSat_unconnectOutput( |
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| 106 | bAig_Manager_t *manager, |
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| 107 | bAigEdge_t from, |
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| 108 | bAigEdge_t to) |
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| 109 | { |
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| 110 | bAigEdge_t cur, *pfan, *newfan; |
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| 111 | int i, nfan,find=0; |
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| 112 | |
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| 113 | from = bAig_NonInvertedEdge(from); |
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| 114 | to = bAig_NonInvertedEdge(to); |
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| 115 | |
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| 116 | pfan = (bAigEdge_t *)fanout(from); |
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| 117 | nfan = nFanout(from); |
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| 118 | newfan = (bAigEdge_t *)malloc(sizeof(bAigEdge_t)*(nfan)); |
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| 119 | for(i=0; i<nfan; i++) { |
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| 120 | cur = pfan[i]; |
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| 121 | cur = cur >> 1; |
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| 122 | cur = bAig_NonInvertedEdge(cur); |
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| 123 | if(cur == to) { |
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| 124 | find = 1; |
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| 125 | memcpy(newfan, pfan, sizeof(bAigEdge_t)*i); |
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| 126 | memcpy(&(newfan[i]), &(pfan[i+1]), sizeof(bAigEdge_t)*(nfan-i-1)); |
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| 127 | newfan[nfan-1] = 0; |
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| 128 | |
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| 129 | fanout(from) = (bAigEdge_t)newfan; |
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| 130 | |
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| 131 | |
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| 132 | free(pfan); |
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| 133 | nFanout(from) = nfan-1; |
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| 134 | break; |
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| 135 | } |
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| 136 | } |
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| 137 | assert(find); |
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| 138 | } |
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| 139 | |
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| 140 | |
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| 141 | /**Function******************************************************************** |
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| 142 | |
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| 143 | Synopsis [for AIG generation---create connection between new and |
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| 144 | old aig nodes] |
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| 145 | |
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| 146 | Description [] |
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| 147 | |
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| 148 | SideEffects [] |
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| 149 | |
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| 150 | SeeAlso [] |
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| 151 | |
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| 152 | ******************************************************************************/ |
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| 153 | |
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| 154 | void |
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| 155 | PureSat_connectOutput( |
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| 156 | bAig_Manager_t *manager, |
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| 157 | bAigEdge_t from, |
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| 158 | bAigEdge_t to, |
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| 159 | int inputIndex) |
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| 160 | { |
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| 161 | bAigEdge_t *pfan; |
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| 162 | bAigEdge_t nfan; |
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| 163 | |
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| 164 | to = bAig_NonInvertedEdge(to); |
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| 165 | pfan = (bAigEdge_t *)fanout(from); |
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| 166 | nfan = nFanout(from); |
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| 167 | if(nfan == 0) pfan = malloc((sizeof(bAigEdge_t)*2)); |
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| 168 | else pfan = realloc(pfan, sizeof(bAigEdge_t)*(nfan+2)); |
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| 169 | to += bAig_IsInverted(from); |
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| 170 | to = to << 1; |
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| 171 | to += inputIndex; |
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| 172 | pfan[nfan++] = to; |
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| 173 | pfan[nfan] = 0; |
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| 174 | fanout(from) = (bAigEdge_t)pfan; |
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| 175 | nFanout(from) = nfan; |
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| 176 | } |
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| 177 | |
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| 178 | |
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| 179 | /**Function******************************************************************** |
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| 180 | |
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| 181 | Synopsis [Check whether a node has been created or not] |
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| 182 | |
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| 183 | Description [] |
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| 184 | |
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| 185 | SideEffects [] |
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| 186 | |
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| 187 | SeeAlso [] |
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| 188 | |
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| 189 | ******************************************************************************/ |
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| 190 | |
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| 191 | bAigEdge_t |
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| 192 | PureSat_HashTableLookup( |
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| 193 | bAig_Manager_t *manager, |
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| 194 | bAigEdge_t node1, |
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| 195 | bAigEdge_t node2) |
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| 196 | { |
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| 197 | bAigEdge_t key = HashTableFunction(node1, node2); |
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| 198 | bAigEdge_t node; |
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| 199 | |
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| 200 | node = manager->HashTableArray[manager->class_][key]; |
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| 201 | if (node == bAig_NULL) { |
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| 202 | return bAig_NULL; |
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| 203 | } |
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| 204 | else{ |
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| 205 | while ( (rightChild(bAig_NonInvertedEdge(node)) != node2) || |
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| 206 | (leftChild(bAig_NonInvertedEdge(node)) != node1)) { |
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| 207 | |
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| 208 | if (next(bAig_NonInvertedEdge(node)) == bAig_NULL){ |
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| 209 | return(bAig_NULL); |
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| 210 | } |
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| 211 | node = next(bAig_NonInvertedEdge(node)); /* Get the next Node */ |
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| 212 | } /* While loop */ |
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| 213 | return(node); |
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| 214 | |
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| 215 | } /* If Then Else */ |
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| 216 | |
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| 217 | } /* End of HashTableLookup() */ |
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| 218 | |
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| 219 | |
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| 220 | /**Function******************************************************************** |
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| 221 | |
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| 222 | Synopsis [Add one new node to hash table] |
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| 223 | |
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| 224 | Description [] |
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| 225 | |
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| 226 | SideEffects [] |
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| 227 | |
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| 228 | SeeAlso [] |
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| 229 | |
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| 230 | ******************************************************************************/ |
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| 231 | |
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| 232 | int |
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| 233 | PureSat_HashTableAdd( |
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| 234 | bAig_Manager_t *manager, |
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| 235 | bAigEdge_t nodeIndexParent, |
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| 236 | bAigEdge_t nodeIndex1, |
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| 237 | bAigEdge_t nodeIndex2) |
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| 238 | { |
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| 239 | bAigEdge_t key = HashTableFunction(nodeIndex1, nodeIndex2); |
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| 240 | bAigEdge_t nodeIndex; |
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| 241 | bAigEdge_t node; |
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| 242 | |
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| 243 | nodeIndex = manager->HashTableArray[manager->class_][key]; |
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| 244 | if (nodeIndex == bAig_NULL) { |
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| 245 | manager->HashTableArray[manager->class_][key] = nodeIndexParent; |
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| 246 | return TRUE; |
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| 247 | } |
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| 248 | else{ |
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| 249 | node = nodeIndex; |
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| 250 | nodeIndex = next(bAig_NonInvertedEdge(nodeIndex)); /* Get the Node */ |
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| 251 | while (nodeIndex != bAig_NULL) { |
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| 252 | node = nodeIndex; |
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| 253 | nodeIndex = next(bAig_NonInvertedEdge(nodeIndex)); |
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| 254 | } |
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| 255 | next(bAig_NonInvertedEdge(node)) = nodeIndexParent; |
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| 256 | return TRUE; |
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| 257 | } |
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| 258 | |
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| 259 | } |
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| 260 | |
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| 261 | |
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| 262 | |
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| 263 | /**Function******************************************************************** |
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| 264 | |
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| 265 | Synopsis [Create a node for AND operation] |
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| 266 | |
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| 267 | Description [] |
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| 268 | |
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| 269 | SideEffects [] |
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| 270 | |
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| 271 | SeeAlso [] |
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| 272 | |
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| 273 | ******************************************************************************/ |
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| 274 | |
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| 275 | bAigEdge_t |
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| 276 | PureSat_CreateAndNode( |
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| 277 | bAig_Manager_t *manager, |
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| 278 | bAigEdge_t node1, |
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| 279 | bAigEdge_t node2) |
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| 280 | { |
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| 281 | |
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| 282 | bAigEdge_t varIndex; |
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| 283 | char *name = NIL(char); |
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| 284 | char *node1Str = util_inttostr(node1); |
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| 285 | char *node2Str = util_inttostr(node2); |
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| 286 | long class_ = manager->class_; |
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| 287 | |
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| 288 | name = util_strcat4("Nd", node1Str,"_", node2Str); |
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| 289 | while (st_lookup(manager->SymbolTableArray[class_], name, &varIndex)){ |
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| 290 | fprintf(vis_stdout, "Find redundant node at %ld %ld\n", node1, node2); |
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| 291 | name = util_strcat3(name, node1Str, node2Str); |
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| 292 | } |
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| 293 | FREE(node1Str); |
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| 294 | FREE(node2Str); |
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| 295 | varIndex = bAig_CreateNode(manager, node1, node2); |
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| 296 | if (varIndex == bAig_NULL){ |
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| 297 | FREE(name); |
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| 298 | return (varIndex); |
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| 299 | } |
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| 300 | /* Insert the varaible in the Symbol Table */ |
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| 301 | st_insert(manager->SymbolTableArray[class_], name, (char*) (long) varIndex); |
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| 302 | manager->nameList[bAigNodeID(varIndex)] = name; |
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| 303 | |
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| 304 | return(varIndex); |
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| 305 | |
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| 306 | } |
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| 307 | |
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| 308 | |
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| 309 | /**Function******************************************************************** |
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| 310 | |
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| 311 | Synopsis [And function for 2 aig nodes] |
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| 312 | |
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| 313 | Description [] |
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| 314 | |
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| 315 | SideEffects [] |
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| 316 | |
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| 317 | SeeAlso [] |
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| 318 | |
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| 319 | ******************************************************************************/ |
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| 320 | |
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| 321 | bAigEdge_t |
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| 322 | PureSat_And2( |
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| 323 | bAig_Manager_t *manager, |
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| 324 | bAigEdge_t nodeIndex1, |
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| 325 | bAigEdge_t nodeIndex2) |
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| 326 | { |
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| 327 | bAigEdge_t newNodeIndex; |
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| 328 | |
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| 329 | newNodeIndex = PureSat_CreateAndNode(manager, nodeIndex1, nodeIndex2) ; |
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| 330 | |
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| 331 | PureSat_HashTableAdd(manager, newNodeIndex, nodeIndex1, nodeIndex2); |
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| 332 | PureSat_connectOutput(manager, nodeIndex1, newNodeIndex, 0); |
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| 333 | PureSat_connectOutput(manager, nodeIndex2, newNodeIndex, 1); |
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| 334 | |
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| 335 | return newNodeIndex; |
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| 336 | |
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| 337 | } |
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| 338 | |
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| 339 | |
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| 340 | /**Function******************************************************************** |
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| 341 | |
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| 342 | Synopsis [And function for 3 aig nodes] |
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| 343 | |
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| 344 | Description [] |
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| 345 | |
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| 346 | SideEffects [] |
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| 347 | |
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| 348 | SeeAlso [] |
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| 349 | |
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| 350 | ******************************************************************************/ |
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| 351 | |
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| 352 | bAigEdge_t |
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| 353 | PureSat_And3( |
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| 354 | bAig_Manager_t *manager, |
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| 355 | bAigEdge_t l, |
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| 356 | bAigEdge_t r) |
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| 357 | { |
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| 358 | int caseIndex, caseSig; |
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| 359 | bAigEdge_t rl, rr; |
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| 360 | |
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| 361 | rl = leftChild(r); |
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| 362 | rr = rightChild(r); |
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| 363 | |
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| 364 | caseIndex = 0; /* (a)(b c) */ |
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| 365 | if(bAigCompareNode(l, rl)) { |
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| 366 | caseIndex = 1; /* (a)(a b) */ |
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| 367 | } |
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| 368 | else if(bAigCompareNode(l, rr)) { |
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| 369 | caseIndex = 2; /* (a)(b a) */ |
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| 370 | } |
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| 371 | |
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| 372 | caseSig = 0; |
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| 373 | if(bAig_IsInverted(l)) caseSig += 8; |
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| 374 | if(bAig_IsInverted(rl)) caseSig += 4; |
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| 375 | if(bAig_IsInverted(rr)) caseSig += 2; |
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| 376 | if(bAig_IsInverted(r)) caseSig += 1; |
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| 377 | if(caseIndex == 0) { |
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| 378 | return(PureSat_And2(manager, l, r)); |
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| 379 | } |
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| 380 | else if(caseIndex == 1) { |
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| 381 | switch(caseSig) { |
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| 382 | case 2 : |
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| 383 | case 0 : |
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| 384 | case 14 : |
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| 385 | case 12 : |
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| 386 | return(r); |
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| 387 | case 10 : |
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| 388 | case 8 : |
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| 389 | case 6 : |
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| 390 | case 4 : |
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| 391 | return(bAig_Zero); |
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| 392 | case 3 : |
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| 393 | case 1 : |
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| 394 | case 15 : |
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| 395 | case 13 : |
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| 396 | return(PureSat_And(manager, rl, bAig_Not(rr))); |
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| 397 | case 11 : |
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| 398 | case 9 : |
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| 399 | case 7 : |
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| 400 | case 5 : |
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| 401 | return(l); |
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| 402 | } |
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| 403 | } |
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| 404 | else if(caseIndex == 2) { |
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| 405 | switch(caseSig) { |
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| 406 | case 4 : |
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| 407 | case 0 : |
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| 408 | case 14 : |
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| 409 | case 10 : |
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| 410 | return(r); |
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| 411 | case 12 : |
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| 412 | case 8 : |
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| 413 | case 6 : |
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| 414 | case 2 : |
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| 415 | return(bAig_Zero); |
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| 416 | case 5 : |
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| 417 | case 1 : |
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| 418 | case 15 : |
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| 419 | case 11 : |
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| 420 | return(PureSat_And(manager, bAig_Not(rl), rr)); |
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| 421 | case 13 : |
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| 422 | case 9 : |
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| 423 | case 7 : |
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| 424 | case 3 : |
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| 425 | return(l); |
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| 426 | } |
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| 427 | } |
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| 428 | return(0); |
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| 429 | } |
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| 430 | |
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| 431 | |
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| 432 | /**Function******************************************************************** |
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| 433 | |
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| 434 | Synopsis [And function for 4 aig nodes] |
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| 435 | |
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| 436 | Description [] |
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| 437 | |
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| 438 | SideEffects [] |
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| 439 | |
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| 440 | SeeAlso [] |
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| 441 | |
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| 442 | ******************************************************************************/ |
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| 443 | |
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| 444 | bAigEdge_t |
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| 445 | PureSat_And4( |
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| 446 | bAig_Manager_t *manager, |
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| 447 | bAigEdge_t l, |
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| 448 | bAigEdge_t r) |
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| 449 | { |
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| 450 | int caseIndex, caseSig; |
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| 451 | bAigEdge_t ll, lr, rl, rr; |
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| 452 | bAigEdge_t t1, t2; |
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| 453 | |
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| 454 | ll = leftChild(l); |
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| 455 | lr = rightChild(l); |
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| 456 | rl = leftChild(r); |
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| 457 | rr = rightChild(r); |
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| 458 | |
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| 459 | if(bAigCompareNode(l, rl) || |
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| 460 | bAigCompareNode(l, rr)) { |
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| 461 | return(PureSat_And3(manager, l, r)); |
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| 462 | } |
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| 463 | else if(bAigCompareNode(r, ll) || |
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| 464 | bAigCompareNode(r, lr)) { |
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| 465 | return(PureSat_And3(manager, r, l)); |
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| 466 | } |
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| 467 | |
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| 468 | if(ll > lr+1) bAigSwap(ll, lr); |
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| 469 | if(rl > rr+1) bAigSwap(rl, rr); |
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| 470 | |
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| 471 | caseIndex = 0; /* (a b)(c d) */ |
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| 472 | if(bAigCompareNode(ll, rl)) { |
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| 473 | if(bAigCompareNode(lr, rr)) { |
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| 474 | caseIndex = 4; /* (a b) (a b) */ |
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| 475 | } |
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| 476 | else { |
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| 477 | caseIndex = 1; /* (a b) (a c) */ |
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| 478 | if(lr > rr+1) { |
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| 479 | bAigSwap(ll, rl); |
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| 480 | bAigSwap(lr, rr); |
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| 481 | bAigSwap(l, r); |
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| 482 | } |
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| 483 | } |
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| 484 | } |
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| 485 | else if(bAigCompareNode(lr, rl)) { |
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| 486 | caseIndex = 2; /* (b a)(a c) */ |
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| 487 | } |
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| 488 | else if(bAigCompareNode(lr, rr)) { |
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| 489 | caseIndex = 3; /* (b a)(c a) */ |
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| 490 | if(ll > rl+1) { |
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| 491 | bAigSwap(ll, rl); |
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| 492 | bAigSwap(lr, rr); |
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| 493 | bAigSwap(l, r); |
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| 494 | } |
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| 495 | } |
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| 496 | else if(bAigCompareNode(ll, rr)) { |
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| 497 | /* (a b)(c a) */ |
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| 498 | bAigSwap(ll, rl); |
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| 499 | bAigSwap(lr, rr); |
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| 500 | bAigSwap(l, r); |
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| 501 | caseIndex = 2; /* (c a )(a b) because of c < b */ |
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| 502 | } |
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| 503 | |
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| 504 | caseSig = 0; |
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| 505 | if(bAig_IsInverted(ll)) caseSig += 32; |
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| 506 | if(bAig_IsInverted(lr)) caseSig += 16; |
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| 507 | if(bAig_IsInverted(l)) caseSig += 8; |
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| 508 | if(bAig_IsInverted(rl)) caseSig += 4; |
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| 509 | if(bAig_IsInverted(rr)) caseSig += 2; |
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| 510 | if(bAig_IsInverted(r)) caseSig += 1; |
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| 511 | |
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| 512 | if(caseIndex == 0) { |
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| 513 | return(PureSat_And2(manager, l, r)); |
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| 514 | } |
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| 515 | else if(caseIndex == 1) { |
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| 516 | switch(caseSig) { |
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| 517 | case 19 : |
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| 518 | case 17 : |
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| 519 | case 3 : |
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| 520 | case 1 : |
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| 521 | case 55 : |
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| 522 | case 53 : |
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| 523 | case 39 : |
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| 524 | case 37 : |
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| 525 | t1 = PureSat_And(manager, lr, bAig_Not(rr)); |
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| 526 | t2 = PureSat_And(manager, ll, t1); |
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| 527 | return(t2); |
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| 528 | case 18 : |
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| 529 | case 16 : |
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| 530 | case 2 : |
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| 531 | case 0 : |
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| 532 | case 54 : |
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| 533 | case 52 : |
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| 534 | case 38 : |
---|
| 535 | case 36 : |
---|
| 536 | t1 = PureSat_And(manager, lr, rr); |
---|
| 537 | t2 = PureSat_And(manager, ll, t1); |
---|
| 538 | return(t2); |
---|
| 539 | case 26 : |
---|
| 540 | case 24 : |
---|
| 541 | case 10 : |
---|
| 542 | case 8 : |
---|
| 543 | case 62 : |
---|
| 544 | case 60 : |
---|
| 545 | case 46 : |
---|
| 546 | case 44 : |
---|
| 547 | t1 = PureSat_And(manager, bAig_Not(lr), rr); |
---|
| 548 | t2 = PureSat_And(manager, ll, t1); |
---|
| 549 | return(t2); |
---|
| 550 | case 61 : |
---|
| 551 | case 27 : |
---|
| 552 | case 25 : |
---|
| 553 | case 11 : |
---|
| 554 | case 63 : |
---|
| 555 | case 47 : |
---|
| 556 | case 9 : |
---|
| 557 | case 45 : |
---|
| 558 | t1 = PureSat_And(manager, bAig_Not(lr), bAig_Not(rr)); |
---|
| 559 | t2 = PureSat_Or(manager, bAig_Not(ll), t1); |
---|
| 560 | return(t2); |
---|
| 561 | case 23 : |
---|
| 562 | case 21 : |
---|
| 563 | case 7 : |
---|
| 564 | case 5 : |
---|
| 565 | case 51 : |
---|
| 566 | case 49 : |
---|
| 567 | case 35 : |
---|
| 568 | case 33 : |
---|
| 569 | return(l); |
---|
| 570 | case 30 : |
---|
| 571 | case 28 : |
---|
| 572 | case 14 : |
---|
| 573 | case 12 : |
---|
| 574 | case 58 : |
---|
| 575 | case 56 : |
---|
| 576 | case 42 : |
---|
| 577 | case 40 : |
---|
| 578 | return(r); |
---|
| 579 | case 22 : |
---|
| 580 | case 20 : |
---|
| 581 | case 6 : |
---|
| 582 | case 4 : |
---|
| 583 | case 50 : |
---|
| 584 | case 48 : |
---|
| 585 | case 34 : |
---|
| 586 | case 32 : |
---|
| 587 | return(bAig_Zero); |
---|
| 588 | case 31 : |
---|
| 589 | case 29 : |
---|
| 590 | case 15 : |
---|
| 591 | case 13 : |
---|
| 592 | case 59 : |
---|
| 593 | case 57 : |
---|
| 594 | case 43 : |
---|
| 595 | case 41 : |
---|
| 596 | t1 = PureSat_And2(manager, l, r); |
---|
| 597 | return(t1); |
---|
| 598 | } |
---|
| 599 | } |
---|
| 600 | else if(caseIndex == 2) { |
---|
| 601 | switch(caseSig) { |
---|
| 602 | case 35 : |
---|
| 603 | case 33 : |
---|
| 604 | case 3 : |
---|
| 605 | case 1 : |
---|
| 606 | case 55 : |
---|
| 607 | case 53 : |
---|
| 608 | case 23 : |
---|
| 609 | case 21 : |
---|
| 610 | t1 = PureSat_And(manager, lr, bAig_Not(rr)); |
---|
| 611 | t2 = PureSat_And(manager, ll, t1); |
---|
| 612 | return(t2); |
---|
| 613 | case 34 : |
---|
| 614 | case 32 : |
---|
| 615 | case 2 : |
---|
| 616 | case 0 : |
---|
| 617 | case 54 : |
---|
| 618 | case 52 : |
---|
| 619 | case 22 : |
---|
| 620 | case 20 : |
---|
| 621 | t1 = PureSat_And(manager, lr, rr); |
---|
| 622 | t2 = PureSat_And(manager, ll, t1); |
---|
| 623 | return(t2); |
---|
| 624 | case 42 : |
---|
| 625 | case 40 : |
---|
| 626 | case 10 : |
---|
| 627 | case 8 : |
---|
| 628 | case 62 : |
---|
| 629 | case 60 : |
---|
| 630 | case 30 : |
---|
| 631 | case 28 : |
---|
| 632 | t1 = PureSat_And(manager, lr, rr); |
---|
| 633 | t2 = PureSat_And(manager, bAig_Not(ll), t1); |
---|
| 634 | return(t2); |
---|
| 635 | case 43 : |
---|
| 636 | case 41 : |
---|
| 637 | case 11 : |
---|
| 638 | case 9 : |
---|
| 639 | case 63 : |
---|
| 640 | case 61 : |
---|
| 641 | case 31 : |
---|
| 642 | case 29 : |
---|
| 643 | t1 = PureSat_And(manager, bAig_Not(ll), bAig_Not(rr)); |
---|
| 644 | t2 = PureSat_Or(manager, bAig_Not(lr), t1); |
---|
| 645 | return(t2); |
---|
| 646 | case 39 : |
---|
| 647 | case 37 : |
---|
| 648 | case 7 : |
---|
| 649 | case 5 : |
---|
| 650 | case 51 : |
---|
| 651 | case 49 : |
---|
| 652 | case 19 : |
---|
| 653 | case 17 : |
---|
| 654 | return(l); |
---|
| 655 | case 46 : |
---|
| 656 | case 44 : |
---|
| 657 | case 14 : |
---|
| 658 | case 12 : |
---|
| 659 | case 58 : |
---|
| 660 | case 56 : |
---|
| 661 | case 26 : |
---|
| 662 | case 24 : |
---|
| 663 | return(r); |
---|
| 664 | case 38 : |
---|
| 665 | case 36 : |
---|
| 666 | case 6 : |
---|
| 667 | case 4 : |
---|
| 668 | case 50 : |
---|
| 669 | case 48 : |
---|
| 670 | case 18 : |
---|
| 671 | case 16 : |
---|
| 672 | return(bAig_Zero); |
---|
| 673 | case 45 : |
---|
| 674 | case 15 : |
---|
| 675 | case 13 : |
---|
| 676 | case 59 : |
---|
| 677 | case 57 : |
---|
| 678 | case 47 : |
---|
| 679 | case 27 : |
---|
| 680 | case 25 : |
---|
| 681 | t1 = PureSat_And2(manager, l, r); |
---|
| 682 | return(t1); |
---|
| 683 | } |
---|
| 684 | } |
---|
| 685 | else if(caseIndex == 3) { |
---|
| 686 | switch(caseSig) { |
---|
| 687 | case 37 : |
---|
| 688 | case 33 : |
---|
| 689 | case 5 : |
---|
| 690 | case 1 : |
---|
| 691 | case 55 : |
---|
| 692 | case 51 : |
---|
| 693 | case 23 : |
---|
| 694 | case 19 : |
---|
| 695 | t1 = PureSat_And(manager, bAig_Not(rl), lr); |
---|
| 696 | t2 = PureSat_And(manager, ll, t1); |
---|
| 697 | return(t2); |
---|
| 698 | case 36 : |
---|
| 699 | case 32 : |
---|
| 700 | case 4 : |
---|
| 701 | case 0 : |
---|
| 702 | case 54 : |
---|
| 703 | case 50 : |
---|
| 704 | case 22 : |
---|
| 705 | case 18 : |
---|
| 706 | t1 = PureSat_And(manager, rl, lr); |
---|
| 707 | t2 = PureSat_And(manager, ll, t1); |
---|
| 708 | return(t2); |
---|
| 709 | case 44 : |
---|
| 710 | case 40 : |
---|
| 711 | case 12 : |
---|
| 712 | case 8 : |
---|
| 713 | case 62 : |
---|
| 714 | case 58 : |
---|
| 715 | case 30 : |
---|
| 716 | case 26 : |
---|
| 717 | t1 = PureSat_And(manager, rl, lr); |
---|
| 718 | t2 = PureSat_And(manager, bAig_Not(ll), t1); |
---|
| 719 | return(t2); |
---|
| 720 | case 45 : |
---|
| 721 | case 41 : |
---|
| 722 | case 13 : |
---|
| 723 | case 9 : |
---|
| 724 | case 63 : |
---|
| 725 | case 59 : |
---|
| 726 | case 31 : |
---|
| 727 | case 27 : |
---|
| 728 | t1 = PureSat_And(manager, bAig_Not(ll), bAig_Not(rl)); |
---|
| 729 | t2 = PureSat_Or(manager, bAig_Not(lr), t1); |
---|
| 730 | return(t2); |
---|
| 731 | case 39 : |
---|
| 732 | case 35 : |
---|
| 733 | case 7 : |
---|
| 734 | case 3 : |
---|
| 735 | case 53 : |
---|
| 736 | case 49 : |
---|
| 737 | case 21 : |
---|
| 738 | case 17 : |
---|
| 739 | return(l); |
---|
| 740 | case 46 : |
---|
| 741 | case 42 : |
---|
| 742 | case 14 : |
---|
| 743 | case 10 : |
---|
| 744 | case 60 : |
---|
| 745 | case 56 : |
---|
| 746 | case 28 : |
---|
| 747 | case 24 : |
---|
| 748 | return(r); |
---|
| 749 | case 38 : |
---|
| 750 | case 34 : |
---|
| 751 | case 6 : |
---|
| 752 | case 2 : |
---|
| 753 | case 52 : |
---|
| 754 | case 48 : |
---|
| 755 | case 20 : |
---|
| 756 | case 16 : |
---|
| 757 | return(bAig_Zero); |
---|
| 758 | case 47 : |
---|
| 759 | case 43 : |
---|
| 760 | case 15 : |
---|
| 761 | case 11 : |
---|
| 762 | case 61 : |
---|
| 763 | case 57 : |
---|
| 764 | case 29 : |
---|
| 765 | case 25 : |
---|
| 766 | t1 = PureSat_And2(manager, l, r); |
---|
| 767 | return(t1); |
---|
| 768 | } |
---|
| 769 | } |
---|
| 770 | else if(caseIndex == 4) { |
---|
| 771 | switch(caseSig) { |
---|
| 772 | case 22 : |
---|
| 773 | case 20 : |
---|
| 774 | case 6 : |
---|
| 775 | case 4 : |
---|
| 776 | case 50 : |
---|
| 777 | case 48 : |
---|
| 778 | case 34 : |
---|
| 779 | case 32 : |
---|
| 780 | case 2 : |
---|
| 781 | case 16 : |
---|
| 782 | case 52 : |
---|
| 783 | case 1 : |
---|
| 784 | case 8 : |
---|
| 785 | case 19 : |
---|
| 786 | case 26 : |
---|
| 787 | case 37 : |
---|
| 788 | case 44 : |
---|
| 789 | case 38 : |
---|
| 790 | case 55 : |
---|
| 791 | case 62 : |
---|
| 792 | return(bAig_Zero); |
---|
| 793 | case 0 : |
---|
| 794 | case 18 : |
---|
| 795 | case 36 : |
---|
| 796 | case 54 : |
---|
| 797 | case 9 : |
---|
| 798 | case 27 : |
---|
| 799 | case 45 : |
---|
| 800 | case 63 : |
---|
| 801 | case 5 : |
---|
| 802 | case 23 : |
---|
| 803 | case 33 : |
---|
| 804 | case 51 : |
---|
| 805 | case 3 : |
---|
| 806 | case 17 : |
---|
| 807 | case 49 : |
---|
| 808 | case 7 : |
---|
| 809 | case 35 : |
---|
| 810 | case 21 : |
---|
| 811 | case 39 : |
---|
| 812 | case 53 : |
---|
| 813 | return(l); |
---|
| 814 | case 40 : |
---|
| 815 | case 58 : |
---|
| 816 | case 12 : |
---|
| 817 | case 30 : |
---|
| 818 | case 24 : |
---|
| 819 | case 10 : |
---|
| 820 | case 14 : |
---|
| 821 | case 56 : |
---|
| 822 | case 28 : |
---|
| 823 | case 42 : |
---|
| 824 | case 60 : |
---|
| 825 | case 46 : |
---|
| 826 | return(r); |
---|
| 827 | case 11 : |
---|
| 828 | case 47 : |
---|
| 829 | case 25 : |
---|
| 830 | case 61 : |
---|
| 831 | return(bAig_Not(ll)); |
---|
| 832 | case 41 : |
---|
| 833 | case 59 : |
---|
| 834 | case 13 : |
---|
| 835 | case 31 : |
---|
| 836 | return(bAig_Not(lr)); |
---|
| 837 | case 15 : |
---|
| 838 | t1 = PureSat_And(manager, ll, bAig_Not(lr)); |
---|
| 839 | t2 = PureSat_And(manager, bAig_Not(ll), lr); |
---|
| 840 | return(bAig_Not(PureSat_And2(manager, bAig_Not(t1), bAig_Not(t2)))); |
---|
| 841 | case 57 : |
---|
| 842 | t1 = PureSat_And(manager, rl, bAig_Not(rr)); |
---|
| 843 | t2 = PureSat_And(manager, bAig_Not(rl), rr); |
---|
| 844 | return(bAig_Not(PureSat_And2(manager, bAig_Not(t1), bAig_Not(t2)))); |
---|
| 845 | case 29 : |
---|
| 846 | t1 = PureSat_And(manager, ll, lr); |
---|
| 847 | t2 = PureSat_And(manager, bAig_Not(ll), bAig_Not(lr)); |
---|
| 848 | return((PureSat_And2(manager, bAig_Not(t1), bAig_Not(t2)))); |
---|
| 849 | case 43 : |
---|
| 850 | t1 = PureSat_And(manager, rl, rr); |
---|
| 851 | t2 = PureSat_And(manager, bAig_Not(rl), bAig_Not(rr)); |
---|
| 852 | return((PureSat_And2(manager, bAig_Not(t1), bAig_Not(t2)))); |
---|
| 853 | } |
---|
| 854 | } |
---|
| 855 | return(0); |
---|
| 856 | } |
---|
| 857 | |
---|
| 858 | |
---|
| 859 | |
---|
| 860 | /**Function******************************************************************** |
---|
| 861 | |
---|
| 862 | Synopsis [test whether two level minimization can be enabled--iff the two |
---|
| 863 | nodes are in the same timeframe] |
---|
| 864 | |
---|
| 865 | Description [output, l,r,ll,lr,rl,rr must be in the same class to pass the test] |
---|
| 866 | |
---|
| 867 | SideEffects [] |
---|
| 868 | |
---|
| 869 | SeeAlso [] |
---|
| 870 | |
---|
| 871 | ******************************************************************************/ |
---|
| 872 | |
---|
| 873 | |
---|
| 874 | int PureSat_Test2LevelMini(bAig_Manager_t *manager, |
---|
| 875 | bAigEdge_t l, |
---|
| 876 | bAigEdge_t r) |
---|
| 877 | { |
---|
| 878 | int class_ = bAig_Class(l); |
---|
| 879 | bAigEdge_t ll,lr,rl,rr; |
---|
| 880 | |
---|
| 881 | if(!manager->test2LevelMini) |
---|
| 882 | return 0; |
---|
| 883 | |
---|
| 884 | if(class_!= bAig_Class(r) || class_ != manager->class_) |
---|
| 885 | return 0; |
---|
| 886 | |
---|
| 887 | ll = leftChild(l); |
---|
| 888 | if(ll!=bAig_NULL && class_!=bAig_Class(ll)) |
---|
| 889 | return 0; |
---|
| 890 | lr = rightChild(l); |
---|
| 891 | if(lr!=bAig_NULL && class_!=bAig_Class(lr)) |
---|
| 892 | return 0; |
---|
| 893 | rl = leftChild(r); |
---|
| 894 | if(rl!=bAig_NULL && class_!=bAig_Class(rl)) |
---|
| 895 | return 0; |
---|
| 896 | rr = rightChild(r); |
---|
| 897 | if(rr!=bAig_NULL && class_!=bAig_Class(rr)) |
---|
| 898 | return 0; |
---|
| 899 | |
---|
| 900 | return 1; |
---|
| 901 | } |
---|
| 902 | |
---|
| 903 | /**Function******************************************************************** |
---|
| 904 | |
---|
| 905 | Synopsis [And function for two AIG nodes. The difference with |
---|
| 906 | bAigCreateAndNode is that here two level minimization |
---|
| 907 | is only allowed with the same timeframe, otherwise the |
---|
| 908 | global variable for interpolation generation may not be |
---|
| 909 | latch variables] |
---|
| 910 | |
---|
| 911 | Description [] |
---|
| 912 | |
---|
| 913 | SideEffects [] |
---|
| 914 | |
---|
| 915 | SeeAlso [] |
---|
| 916 | |
---|
| 917 | ******************************************************************************/ |
---|
| 918 | |
---|
| 919 | bAigEdge_t |
---|
| 920 | PureSat_And( |
---|
| 921 | bAig_Manager_t *manager, |
---|
| 922 | bAigEdge_t nodeIndex1, |
---|
| 923 | bAigEdge_t nodeIndex2) |
---|
| 924 | { |
---|
| 925 | |
---|
| 926 | bAigEdge_t newNodeIndex; |
---|
| 927 | |
---|
| 928 | nodeIndex1 = bAig_GetCanonical(manager, nodeIndex1); |
---|
| 929 | nodeIndex2 = bAig_GetCanonical(manager, nodeIndex2); |
---|
| 930 | |
---|
| 931 | newNodeIndex = nodeIndex1; /* The left node has the smallest index */ |
---|
| 932 | if (bAig_NonInvertedEdge(nodeIndex1) > bAig_NonInvertedEdge(nodeIndex2)){ |
---|
| 933 | nodeIndex1 = nodeIndex2; |
---|
| 934 | nodeIndex2 = newNodeIndex; |
---|
| 935 | } |
---|
| 936 | |
---|
| 937 | if ( nodeIndex2 == bAig_Zero ) { |
---|
| 938 | return bAig_Zero; |
---|
| 939 | } |
---|
| 940 | if ( nodeIndex1 == bAig_Zero ) { |
---|
| 941 | return bAig_Zero; |
---|
| 942 | } |
---|
| 943 | if ( nodeIndex2 == bAig_One ) { |
---|
| 944 | return nodeIndex1; |
---|
| 945 | } |
---|
| 946 | if ( nodeIndex1 == bAig_One ) { |
---|
| 947 | return nodeIndex2; |
---|
| 948 | } |
---|
| 949 | if ( nodeIndex1 == nodeIndex2 ) { |
---|
| 950 | return nodeIndex1; |
---|
| 951 | } |
---|
| 952 | if ( nodeIndex1 == bAig_Not(nodeIndex2) ) { |
---|
| 953 | return bAig_Zero; |
---|
| 954 | } |
---|
| 955 | |
---|
| 956 | /* Look for the new node in the Hash table */ |
---|
| 957 | newNodeIndex = PureSat_HashTableLookup(manager, nodeIndex1, nodeIndex2); |
---|
| 958 | |
---|
| 959 | |
---|
| 960 | if (newNodeIndex == bAig_NULL){ |
---|
| 961 | if(!PureSat_Test2LevelMini(manager,nodeIndex1,nodeIndex2)){ |
---|
| 962 | newNodeIndex = PureSat_And2(manager, nodeIndex1, nodeIndex2); |
---|
| 963 | return newNodeIndex; |
---|
| 964 | } |
---|
| 965 | |
---|
| 966 | if(bAigIsVar(manager, nodeIndex1) && bAigIsVar(manager, nodeIndex2)) |
---|
| 967 | newNodeIndex = PureSat_And2(manager, nodeIndex1, nodeIndex2); |
---|
| 968 | else if(bAigIsVar(manager, nodeIndex1)) |
---|
| 969 | newNodeIndex = PureSat_And3(manager, nodeIndex1, nodeIndex2); |
---|
| 970 | else if(bAigIsVar(manager, nodeIndex2)) |
---|
| 971 | newNodeIndex = PureSat_And3(manager, nodeIndex2, nodeIndex1); |
---|
| 972 | else { |
---|
| 973 | newNodeIndex = PureSat_And4(manager, nodeIndex1, nodeIndex2); |
---|
| 974 | } |
---|
| 975 | } |
---|
| 976 | |
---|
| 977 | return newNodeIndex; |
---|
| 978 | |
---|
| 979 | } |
---|
| 980 | |
---|
| 981 | |
---|
| 982 | /**Function******************************************************************** |
---|
| 983 | |
---|
| 984 | Synopsis [OR operation for two aig nodes] |
---|
| 985 | |
---|
| 986 | Description [] |
---|
| 987 | |
---|
| 988 | SideEffects [] |
---|
| 989 | |
---|
| 990 | SeeAlso [] |
---|
| 991 | |
---|
| 992 | ******************************************************************************/ |
---|
| 993 | |
---|
| 994 | bAigEdge_t |
---|
| 995 | PureSat_Or( |
---|
| 996 | bAig_Manager_t *manager, |
---|
| 997 | bAigEdge_t nodeIndex1, |
---|
| 998 | bAigEdge_t nodeIndex2) |
---|
| 999 | { |
---|
| 1000 | return ( bAig_Not(PureSat_And(manager, bAig_Not(nodeIndex1), bAig_Not(nodeIndex2)))); |
---|
| 1001 | } |
---|
| 1002 | |
---|
| 1003 | |
---|
| 1004 | /**Function******************************************************************** |
---|
| 1005 | |
---|
| 1006 | Synopsis [XOR operation for two aig nodes] |
---|
| 1007 | |
---|
| 1008 | Description [] |
---|
| 1009 | |
---|
| 1010 | SideEffects [] |
---|
| 1011 | |
---|
| 1012 | SeeAlso [] |
---|
| 1013 | |
---|
| 1014 | ******************************************************************************/ |
---|
| 1015 | |
---|
| 1016 | bAigEdge_t |
---|
| 1017 | PureSat_Xor( |
---|
| 1018 | bAig_Manager_t *manager, |
---|
| 1019 | bAigEdge_t nodeIndex1, |
---|
| 1020 | bAigEdge_t nodeIndex2) |
---|
| 1021 | { |
---|
| 1022 | return PureSat_Or(manager, |
---|
| 1023 | PureSat_And(manager, nodeIndex1, bAig_Not(nodeIndex2)), |
---|
| 1024 | PureSat_And(manager, bAig_Not(nodeIndex1),nodeIndex2) |
---|
| 1025 | ); |
---|
| 1026 | } |
---|
| 1027 | |
---|
| 1028 | |
---|
| 1029 | /**Function******************************************************************** |
---|
| 1030 | |
---|
| 1031 | Synopsis [EQ operation for two aig nodes] |
---|
| 1032 | |
---|
| 1033 | Description [] |
---|
| 1034 | |
---|
| 1035 | SideEffects [] |
---|
| 1036 | |
---|
| 1037 | SeeAlso [] |
---|
| 1038 | |
---|
| 1039 | ******************************************************************************/ |
---|
| 1040 | |
---|
| 1041 | bAigEdge_t |
---|
| 1042 | PureSat_Eq( |
---|
| 1043 | bAig_Manager_t *manager, |
---|
| 1044 | bAigEdge_t nodeIndex1, |
---|
| 1045 | bAigEdge_t nodeIndex2) |
---|
| 1046 | { |
---|
| 1047 | return bAig_Not( |
---|
| 1048 | PureSat_Xor(manager, nodeIndex1, nodeIndex2) |
---|
| 1049 | ); |
---|
| 1050 | } |
---|
| 1051 | |
---|
| 1052 | |
---|
| 1053 | /**Function******************************************************************** |
---|
| 1054 | |
---|
| 1055 | Synopsis [THEN operation for two aig nodes] |
---|
| 1056 | |
---|
| 1057 | Description [] |
---|
| 1058 | |
---|
| 1059 | SideEffects [] |
---|
| 1060 | |
---|
| 1061 | SeeAlso [] |
---|
| 1062 | |
---|
| 1063 | ******************************************************************************/ |
---|
| 1064 | |
---|
| 1065 | bAigEdge_t |
---|
| 1066 | PureSat_Then( |
---|
| 1067 | bAig_Manager_t *manager, |
---|
| 1068 | bAigEdge_t nodeIndex1, |
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| 1069 | bAigEdge_t nodeIndex2) |
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| 1070 | { |
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| 1071 | return PureSat_Or(manager, |
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| 1072 | bAig_Not(nodeIndex1), |
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| 1073 | nodeIndex2); |
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| 1074 | } |
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| 1075 | |
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| 1076 | |
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| 1077 | |
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| 1078 | /**Function******************************************************************** |
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| 1079 | |
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| 1080 | Synopsis [Create variable AIG nodes] |
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| 1081 | |
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| 1082 | Description [] |
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| 1083 | |
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| 1084 | SideEffects [] |
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| 1085 | |
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| 1086 | SeeAlso [] |
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| 1087 | |
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| 1088 | ******************************************************************************/ |
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| 1089 | |
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| 1090 | |
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| 1091 | bAigEdge_t |
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| 1092 | PureSat_CreateVarNode( |
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| 1093 | bAig_Manager_t *manager, |
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| 1094 | nameType_t *name) |
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| 1095 | { |
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| 1096 | |
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| 1097 | bAigEdge_t varIndex; |
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| 1098 | int class_ = manager->class_; |
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| 1099 | |
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| 1100 | |
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| 1101 | if (!st_lookup(manager->SymbolTableArray[class_], name, &varIndex)){ |
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| 1102 | varIndex = bAig_CreateNode(manager, bAig_NULL, bAig_NULL); |
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| 1103 | if (varIndex == bAig_NULL){ |
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| 1104 | return (varIndex); |
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| 1105 | } |
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| 1106 | /* Insert the varaible in the Symbol Table */ |
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| 1107 | st_insert(manager->SymbolTableArray[class_], |
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| 1108 | name, (char*) (long) varIndex); |
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| 1109 | manager->nameList[bAigNodeID(varIndex)] = name; |
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| 1110 | return(varIndex); |
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| 1111 | } |
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| 1112 | else { |
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| 1113 | return (varIndex); |
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| 1114 | } |
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| 1115 | } |
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