[14] | 1 | /**CFile*********************************************************************** |
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| 2 | |
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| 3 | FileName [satDecision.c] |
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| 4 | |
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| 5 | PackageName [sat] |
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| 6 | |
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| 7 | Synopsis [Routines for various decision heuristics.] |
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| 8 | |
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| 9 | Author [HoonSang Jin] |
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| 10 | |
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| 11 | Copyright [ This file was created at the University of Colorado at |
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| 12 | Boulder. The University of Colorado at Boulder makes no warranty |
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| 13 | about the suitability of this software for any purpose. It is |
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| 14 | presented on an AS IS basis.] |
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| 15 | |
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| 16 | |
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| 17 | ******************************************************************************/ |
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| 18 | |
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| 19 | #include "satInt.h" |
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| 20 | |
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| 21 | static char rcsid[] UNUSED = "$Id: satDecision.c,v 1.28 2009/04/11 18:26:37 fabio Exp $"; |
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| 22 | static satManager_t *SatCm; |
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| 23 | |
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| 24 | /*---------------------------------------------------------------------------*/ |
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| 25 | /* Constant declarations */ |
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| 26 | /*---------------------------------------------------------------------------*/ |
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| 27 | |
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| 28 | /**AutomaticStart*************************************************************/ |
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| 29 | |
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| 30 | /*---------------------------------------------------------------------------*/ |
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| 31 | /* Static function prototypes */ |
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| 32 | /*---------------------------------------------------------------------------*/ |
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| 33 | |
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| 34 | static int ScoreCompare(const void * node1, const void * node2); |
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| 35 | |
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| 36 | /**AutomaticEnd***************************************************************/ |
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| 37 | |
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| 38 | |
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| 39 | /*---------------------------------------------------------------------------*/ |
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| 40 | /* Definition of exported functions */ |
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| 41 | /*---------------------------------------------------------------------------*/ |
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| 42 | |
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| 43 | |
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| 44 | /**Function******************************************************************** |
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| 45 | |
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| 46 | Synopsis [ Select decision variable] |
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| 47 | |
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| 48 | Description [ Select decision variable] |
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| 49 | |
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| 50 | SideEffects [] |
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| 51 | |
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| 52 | SeeAlso [] |
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| 53 | |
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| 54 | ******************************************************************************/ |
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| 55 | satLevel_t * |
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| 56 | sat_MakeDecision(satManager_t *cm) |
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| 57 | { |
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| 58 | satLevel_t *d; |
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| 59 | int value; |
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| 60 | long v; |
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| 61 | satStatistics_t *stats; |
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| 62 | |
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| 63 | d = SATgetDecision(cm->currentDecision); |
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| 64 | |
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| 65 | if(cm->queue->size) |
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| 66 | return(d); |
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| 67 | |
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| 68 | d = sat_AllocLevel(cm); |
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| 69 | |
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| 70 | v = 0; |
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| 71 | v = sat_DecisionBasedOnBDD(cm, d); |
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| 72 | |
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| 73 | if(v == 0) |
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| 74 | v = sat_DecisionBasedOnLatestConflict(cm, d); |
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| 75 | |
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| 76 | if(v == 0) |
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| 77 | v = sat_DecisionBasedOnScore(cm, d); |
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| 78 | |
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| 79 | if(v == 0) |
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| 80 | return(0); |
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| 81 | |
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| 82 | |
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| 83 | stats = cm->each; |
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| 84 | |
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| 85 | stats->nDecisions++; |
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| 86 | |
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| 87 | value = !(SATisInverted(v)); |
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| 88 | v = SATnormalNode(v); |
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| 89 | d->decisionNode = v; |
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| 90 | d->nConflict = cm->each->nConflictCl; |
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| 91 | |
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| 92 | SATvalue(v) = value; |
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| 93 | /** |
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| 94 | if(cm->option->verbose > 1) { |
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| 95 | var = SATgetVariable(v); |
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| 96 | fprintf(cm->stdOut, "decision at %3d on %6d <- %d score(%d %d) %d\n", |
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| 97 | d->level, v, value, var->scores[0], var->scores[1], |
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| 98 | cm->each->nDecisions); |
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| 99 | fflush(cm->stdOut); |
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| 100 | } |
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| 101 | **/ |
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| 102 | SATmakeImplied(v, d); |
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| 103 | |
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| 104 | sat_Enqueue(cm->queue, v); |
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| 105 | SATflags(v) |= InQueueMask; |
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| 106 | |
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| 107 | return(d); |
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| 108 | } |
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| 109 | |
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| 110 | |
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| 111 | /**Function******************************************************************** |
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| 112 | |
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| 113 | Synopsis [ Decision making based on current top clause ] |
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| 114 | |
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| 115 | Description [ Decision making based on current top clause ] |
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| 116 | |
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| 117 | SideEffects [] |
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| 118 | |
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| 119 | SeeAlso [] |
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| 120 | |
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| 121 | ******************************************************************************/ |
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| 122 | long |
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| 123 | sat_DecisionBasedOnLatestConflict( |
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| 124 | satManager_t *cm, |
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| 125 | satLevel_t *d) |
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| 126 | { |
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| 127 | satOption_t *option; |
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| 128 | satStatistics_t *stats; |
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| 129 | satLiteralDB_t *literals; |
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| 130 | satVariable_t *var; |
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| 131 | int size, limit; |
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| 132 | long *plit, *tplit; |
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| 133 | long v, lit, tv, maxV; |
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| 134 | int tsize, count; |
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| 135 | int inverted, value; |
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| 136 | int i, j, satisfied; |
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| 137 | int tmpScore, maxScore; |
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| 138 | |
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| 139 | option = cm->option; |
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| 140 | stats = cm->each; |
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| 141 | |
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| 142 | if(!(option->decisionHeuristic & LATEST_CONFLICT_DECISION)) |
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| 143 | return(0); |
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| 144 | |
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| 145 | /** CONSIDER |
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| 146 | if(stats->nConflictCl < option->minConflictForDecision) |
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| 147 | return(0); |
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| 148 | |
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| 149 | **/ |
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| 150 | |
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| 151 | |
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| 152 | if(cm->currentTopConflict == 0) |
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| 153 | return(0); |
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| 154 | |
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| 155 | literals = cm->literals; |
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| 156 | size = literals->last - literals->begin; |
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| 157 | |
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| 158 | limit = MAXINT; |
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| 159 | if(option->maxConflictForDecision > 0) |
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| 160 | limit = option->maxConflictForDecision; |
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| 161 | |
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| 162 | count = cm->currentTopConflictCount; |
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| 163 | tv = -(*(cm->currentTopConflict)); |
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| 164 | tsize = SATnumLits(tv); |
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| 165 | tplit = (long*)SATfirstLit(tv); |
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| 166 | plit = tplit + tsize; |
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| 167 | |
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| 168 | for(i=plit-literals->begin; i>=0; i--, plit--) { |
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| 169 | /** for(plit =literals->last-1, i=literals->last - literals->begin; i>=0; i--, plit--) { */ |
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| 170 | if(count > limit) break; |
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| 171 | |
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| 172 | lit = *plit; |
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| 173 | if(lit < 0) { |
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| 174 | tv = -lit; |
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| 175 | |
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| 176 | if(!(SATflags(tv) & IsConflictMask)) |
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| 177 | return(0); |
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| 178 | |
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| 179 | if(plit < (long*)SATfirstLit(tv)) |
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| 180 | continue; |
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| 181 | |
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| 182 | count++; |
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| 183 | |
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| 184 | if(option->skipSatisfiedClauseForDecision) { |
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| 185 | tsize = SATnumLits(tv); |
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| 186 | tplit = (long *)SATfirstLit(tv); |
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| 187 | satisfied = 0; |
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| 188 | maxScore = -1; |
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| 189 | maxV = 0; |
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| 190 | for(j=0; j<tsize; j++, tplit++) { |
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| 191 | v = SATgetNode(*tplit); |
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| 192 | inverted = SATisInverted(v); |
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| 193 | v = SATnormalNode(v); |
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| 194 | value = SATvalue(v) ^ inverted; |
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| 195 | if(value == 1) { |
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| 196 | satisfied = 1; |
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| 197 | break; |
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| 198 | } |
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| 199 | else if(value == 0) { |
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| 200 | continue; |
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| 201 | } |
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| 202 | var = SATgetVariable(v); |
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| 203 | tmpScore = (var->scores[0] >= var->scores[1]) ? var->scores[0] : var->scores[1]; |
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| 204 | if(tmpScore > maxScore) { |
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| 205 | maxScore = tmpScore; |
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| 206 | maxV = v; |
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| 207 | } |
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| 208 | } |
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| 209 | if(satisfied) { |
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| 210 | i = i - tsize - 1; |
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| 211 | plit = plit - tsize -1; |
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| 212 | } |
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| 213 | else { |
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| 214 | var = SATgetVariable(maxV); |
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| 215 | value = (var->scores[0] >= var->scores[1]) ? 0 : 1; |
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| 216 | |
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| 217 | cm->currentTopConflict = (long*)SATfirstLit(tv) + SATnumLits(tv); |
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| 218 | cm->currentTopConflictCount = count; |
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| 219 | |
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| 220 | stats = cm->each; |
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| 221 | stats->nLatestConflictDecisions++; |
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| 222 | return(maxV ^ !value); |
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| 223 | } |
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| 224 | } |
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| 225 | continue; |
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| 226 | } |
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| 227 | else if(lit == 0) |
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| 228 | continue; |
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| 229 | |
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| 230 | v = SATgetNode(lit); |
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| 231 | inverted = SATisInverted(v); |
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| 232 | v = SATnormalNode(v); |
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| 233 | value = SATvalue(v) ^ inverted; |
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| 234 | |
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| 235 | if(value >= 2) { |
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| 236 | var = SATgetVariable(v); |
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| 237 | value = (var->conflictLits[0] >= var->conflictLits[1]) ? 0 : 1; |
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| 238 | |
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| 239 | cm->currentTopConflict = (long*)SATfirstLit(tv) + SATnumLits(tv); |
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| 240 | cm->currentTopConflictCount = count; |
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| 241 | |
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| 242 | stats = cm->each; |
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| 243 | stats->nLatestConflictDecisions++; |
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| 244 | return(v ^ !value); |
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| 245 | } |
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| 246 | } |
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| 247 | return(0); |
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| 248 | } |
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| 249 | |
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| 250 | /**Function******************************************************************** |
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| 251 | |
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| 252 | Synopsis [ Check decision variable to check correctness of currentVarPos, |
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| 253 | since currentVarPos has to point lowest variable that are |
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| 254 | not implied.] |
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| 255 | |
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| 256 | Description [ Check decision variable to check correctness of currentVarPos, |
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| 257 | since currentVarPos has to point lowest variable that are |
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| 258 | not implied.] |
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| 259 | |
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| 260 | SideEffects [] |
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| 261 | |
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| 262 | SeeAlso [] |
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| 263 | |
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| 264 | ******************************************************************************/ |
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| 265 | void |
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| 266 | sat_CheckDecisonVariableArray( |
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| 267 | satManager_t *cm) |
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| 268 | { |
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| 269 | satArray_t *orderedVariableArray; |
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| 270 | int size, i; |
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| 271 | long v; |
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| 272 | |
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| 273 | orderedVariableArray = cm->orderedVariableArray; |
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| 274 | size = orderedVariableArray->num; |
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| 275 | for(i=0; i<cm->currentVarPos; i++) { |
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| 276 | v = orderedVariableArray->space[i]; |
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| 277 | if(SATvalue(v) > 1) { |
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| 278 | fprintf(stdout, " ERROR : wrong current variable pos %d at %d\n", |
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| 279 | cm->currentVarPos, i); |
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| 280 | } |
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| 281 | } |
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| 282 | } |
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| 283 | |
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| 284 | /**Function******************************************************************** |
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| 285 | |
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| 286 | Synopsis [ Decision making based on score based heuristic ] |
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| 287 | |
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| 288 | Description [ Decision making based on score based heuristic ] |
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| 289 | |
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| 290 | SideEffects [] |
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| 291 | |
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| 292 | SeeAlso [] |
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| 293 | |
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| 294 | ******************************************************************************/ |
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| 295 | long |
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| 296 | sat_DecisionBasedOnScore( |
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| 297 | satManager_t *cm, |
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| 298 | satLevel_t *d) |
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| 299 | { |
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| 300 | int size, i; |
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| 301 | long v; |
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| 302 | int value; |
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| 303 | satVariable_t *var; |
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| 304 | satArray_t *orderedVariableArray; |
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| 305 | satStatistics_t *stats; |
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| 306 | satOption_t *option; |
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| 307 | |
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| 308 | |
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| 309 | option = cm->option; |
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| 310 | orderedVariableArray = cm->orderedVariableArray; |
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| 311 | size = orderedVariableArray->num; |
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| 312 | |
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| 313 | for(i=cm->currentVarPos; i<size; i++) { |
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| 314 | v = orderedVariableArray->space[i]; |
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| 315 | if(SATvalue(v) < 2) continue; |
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| 316 | |
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| 317 | var = SATgetVariable(v); |
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| 318 | value = (var->scores[0] >= var->scores[1]) ? 0 : 1; |
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| 319 | |
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| 320 | stats = cm->each; |
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| 321 | if((var->scores[0]+var->scores[1]) < 1) { |
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| 322 | stats->nLowScoreDecisions++; |
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| 323 | } |
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| 324 | |
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| 325 | |
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| 326 | if((option->decisionHeuristic & DVH_DECISION)) |
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| 327 | stats->nDVHDecisions++; |
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| 328 | else |
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| 329 | stats->nVSIDSDecisions++; |
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| 330 | |
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| 331 | cm->currentVarPos = i; |
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| 332 | d->currentVarPos = i; |
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| 333 | |
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| 334 | return(v ^ !value); |
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| 335 | } |
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| 336 | |
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| 337 | return(0); |
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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 [ Take care of decision by BDD based mathod ] |
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| 343 | |
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| 344 | Description [ Take care of decision by BDD based mathod ] |
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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 | long |
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| 352 | sat_DecisionBasedOnBDD( |
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| 353 | satManager_t *cm, |
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| 354 | satLevel_t *d) |
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| 355 | { |
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| 356 | satArray_t *arr; |
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| 357 | long nv, v; |
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| 358 | |
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| 359 | if(cm->assignByBDD == 0) |
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| 360 | return(0); |
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| 361 | |
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| 362 | arr = cm->assignByBDD; |
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| 363 | if(arr->num == 0) |
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| 364 | return(0); |
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| 365 | |
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| 366 | /** |
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| 367 | for(i=0; i<arr->num; i++) { |
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| 368 | v = arr->space[i]; |
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| 369 | nv = SATnormalNode(v); |
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| 370 | if(SATvalue(nv) > 1) |
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| 371 | return(v); |
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| 372 | } |
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| 373 | **/ |
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| 374 | |
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| 375 | while(arr->num) { |
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| 376 | v = arr->space[arr->num-1]; |
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| 377 | nv = SATnormalNode(v); |
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| 378 | arr->num--; |
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| 379 | if(SATvalue(nv) > 1) |
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| 380 | return(v); |
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| 381 | } |
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| 382 | return(0); |
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| 383 | } |
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| 384 | |
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| 385 | |
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| 386 | long |
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| 387 | sat_DecisionBasedOnShrink( |
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| 388 | satManager_t *cm) |
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| 389 | { |
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| 390 | satArray_t *arr; |
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| 391 | long nv, v; |
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| 392 | |
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| 393 | if(cm->shrinkArray == 0) |
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| 394 | return(0); |
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| 395 | |
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| 396 | arr = cm->shrinkArray; |
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| 397 | if(arr->num == 0) |
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| 398 | return(0); |
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| 399 | |
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| 400 | while(arr->num) { |
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| 401 | v = arr->space[arr->num-1]; |
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| 402 | nv = SATnormalNode(v); |
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| 403 | arr->num--; |
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| 404 | if(SATvalue(nv) > 1) |
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| 405 | return(v); |
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| 406 | } |
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| 407 | return(0); |
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| 408 | } |
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| 409 | |
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| 410 | |
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| 411 | /**Function******************************************************************** |
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| 412 | |
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| 413 | Synopsis [ Update the score of variables ] |
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| 414 | |
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| 415 | Description [ Update the score of variables ] |
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| 416 | |
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| 417 | SideEffects [] |
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| 418 | |
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| 419 | SeeAlso [] |
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| 420 | |
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| 421 | ******************************************************************************/ |
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| 422 | void |
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| 423 | sat_UpdateScore( |
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| 424 | satManager_t *cm) |
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| 425 | { |
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| 426 | satArray_t *one, *tmp; |
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| 427 | satArray_t *ordered; |
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| 428 | satVariable_t *var; |
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| 429 | int size, i; |
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| 430 | long v; |
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| 431 | int value; |
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| 432 | |
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| 433 | ordered = cm->orderedVariableArray; |
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| 434 | |
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| 435 | one = sat_ArrayAlloc(ordered->num); |
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| 436 | tmp = sat_ArrayAlloc(ordered->num); |
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| 437 | |
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| 438 | size = ordered->num; |
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| 439 | for(i=0; i<size; i++) { |
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| 440 | v = ordered->space[i]; |
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| 441 | |
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| 442 | if(SATvalue(v) < 2 && SATlevel(v) == 0) |
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| 443 | continue; |
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| 444 | |
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| 445 | var = SATgetVariable(v); |
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| 446 | var->scores[0] = (var->scores[0]>>1) + var->litsCount[0] - var->lastLitsCount[0]; |
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| 447 | var->scores[1] = (var->scores[1]>>1) + var->litsCount[1] - var->lastLitsCount[1]; |
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| 448 | var->lastLitsCount[0] = var->litsCount[0]; |
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| 449 | var->lastLitsCount[1] = var->litsCount[1]; |
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| 450 | |
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| 451 | |
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| 452 | if((var->scores[0] + var->scores[1]) < 1) { |
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| 453 | sat_ArrayInsert(one, v); |
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| 454 | } |
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| 455 | else { |
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| 456 | value = (var->scores[0] > var->scores[1]) ? var->scores[0] : var->scores[1]; |
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| 457 | sat_ArrayInsert(tmp, v); |
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| 458 | sat_ArrayInsert(tmp, value); |
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| 459 | } |
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| 460 | } |
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| 461 | |
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| 462 | SatCm = cm; |
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| 463 | qsort(tmp->space, (tmp->num)>>1, sizeof(long)*2, ScoreCompare); |
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| 464 | |
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| 465 | ordered->num = 0; |
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| 466 | size = tmp->num; |
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| 467 | for(i=0; i<size; i++) { |
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| 468 | v = tmp->space[i]; |
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| 469 | sat_ArrayInsert(ordered, v); |
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| 470 | var = SATgetVariable(v); |
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| 471 | var->pos = (i>>1); |
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| 472 | i++; |
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| 473 | } |
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| 474 | |
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| 475 | size = one->num; |
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| 476 | for(i=0; i<size; i++) { |
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| 477 | v = one->space[i]; |
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| 478 | var = SATgetVariable(v); |
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| 479 | var->pos = ordered->num; |
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| 480 | sat_ArrayInsert(ordered, v); |
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| 481 | } |
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| 482 | |
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| 483 | sat_ArrayFree(one); |
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| 484 | sat_ArrayFree(tmp); |
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| 485 | |
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| 486 | cm->orderedVariableArray = ordered; |
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| 487 | cm->currentVarPos = 0; |
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| 488 | |
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| 489 | for(i=1; i<cm->currentDecision; i++) { |
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| 490 | cm->decisionHead[i].currentVarPos = 0; |
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| 491 | } |
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| 492 | |
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| 493 | if(cm->option->verbose > 3) |
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| 494 | sat_PrintScore(cm); |
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| 495 | |
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| 496 | } |
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| 497 | |
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| 498 | |
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| 499 | /**Function******************************************************************** |
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| 500 | |
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| 501 | Synopsis [ Update the score of variables by deepest variable hike] |
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| 502 | |
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| 503 | Description [ Update the score of variables by deepest variable hike] |
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| 504 | |
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| 505 | SideEffects [] |
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| 506 | |
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| 507 | SeeAlso [] |
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| 508 | |
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| 509 | ******************************************************************************/ |
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| 510 | void |
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| 511 | sat_UpdateDVH( |
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| 512 | satManager_t *cm, |
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| 513 | satLevel_t *d, |
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| 514 | satArray_t *clauseArray, |
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| 515 | int bLevel, |
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| 516 | long unitLit) |
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| 517 | { |
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| 518 | satArray_t *ordered; |
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| 519 | satLevel_t *td; |
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| 520 | satVariable_t *var, *tvar, *ttvar; |
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| 521 | int score, tscore, ttscore; |
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| 522 | int value; |
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| 523 | long v; |
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| 524 | int gap, i, insert; |
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| 525 | |
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| 526 | |
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| 527 | ordered = cm->orderedVariableArray; |
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| 528 | |
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| 529 | unitLit = SATnormalNode(unitLit); |
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| 530 | gap = cm->currentDecision - bLevel; |
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| 531 | td = SATgetDecision(bLevel+1); |
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| 532 | |
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| 533 | if(gap <= 1) { |
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| 534 | /** CONSIDER .... */ |
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| 535 | } |
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| 536 | var = SATgetVariable(unitLit); |
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| 537 | tvar = SATgetVariable(td->decisionNode); |
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| 538 | |
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| 539 | score = (var->scores[1] > var->scores[0]) ? var->scores[1] : var->scores[0]; |
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| 540 | tscore = (tvar->scores[1] > tvar->scores[0]) ? tvar->scores[1] : tvar->scores[0]; |
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| 541 | |
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| 542 | if(score >= tscore) { |
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| 543 | return; |
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| 544 | } |
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| 545 | |
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| 546 | tscore += 1; |
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| 547 | |
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| 548 | value = SATvalue(unitLit); |
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| 549 | if(value == 0)var->scores[1] = tscore; |
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| 550 | else var->scores[0] = tscore; |
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| 551 | |
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| 552 | ordered = cm->orderedVariableArray; |
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| 553 | insert = 0; |
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| 554 | for(i=var->pos; i>=1; i--) { |
---|
| 555 | v = ordered->space[i-1]; |
---|
| 556 | ttvar = SATgetVariable(v); |
---|
| 557 | ttscore = (ttvar->scores[1] > ttvar->scores[0]) ? ttvar->scores[1] : ttvar->scores[0]; |
---|
| 558 | if(tscore > ttscore && i>1) { |
---|
| 559 | ttvar->pos = i; |
---|
| 560 | ordered->space[i] = v; |
---|
| 561 | continue; |
---|
| 562 | } |
---|
| 563 | |
---|
| 564 | var->pos = i; |
---|
| 565 | ordered->space[i] = unitLit; |
---|
| 566 | insert = 1; |
---|
| 567 | break; |
---|
| 568 | } |
---|
| 569 | |
---|
| 570 | if(insert == 0) { |
---|
| 571 | var->pos = i; |
---|
| 572 | ordered->space[0] = unitLit; |
---|
| 573 | } |
---|
| 574 | |
---|
| 575 | for(i=d->level; i>0; i--) { |
---|
| 576 | td = SATgetDecision(i); |
---|
| 577 | if(td->currentVarPos < var->pos) |
---|
| 578 | break; |
---|
| 579 | td->currentVarPos = var->pos; |
---|
| 580 | } |
---|
| 581 | cm->currentVarPos = td->currentVarPos; |
---|
| 582 | |
---|
| 583 | } |
---|
| 584 | |
---|
| 585 | /**Function******************************************************************** |
---|
| 586 | |
---|
| 587 | Synopsis [ Check correctness of variable order ] |
---|
| 588 | |
---|
| 589 | Description [ Check correctness of variable order ] |
---|
| 590 | |
---|
| 591 | SideEffects [] |
---|
| 592 | |
---|
| 593 | SeeAlso [] |
---|
| 594 | |
---|
| 595 | ******************************************************************************/ |
---|
| 596 | void |
---|
| 597 | sat_CheckOrderedVariableArray(satManager_t *cm) |
---|
| 598 | { |
---|
| 599 | satArray_t *ordered; |
---|
| 600 | satVariable_t *var; |
---|
| 601 | int i; |
---|
| 602 | long v; |
---|
| 603 | |
---|
| 604 | ordered = cm->orderedVariableArray; |
---|
| 605 | for(i=0; i<ordered->num; i++) { |
---|
| 606 | v = ordered->space[i]; |
---|
| 607 | var = SATgetVariable(v); |
---|
| 608 | if(i != var->pos) { |
---|
| 609 | fprintf(cm->stdOut, "Error : wrong variable position %d %d in ordered array\n", i, var->pos); |
---|
| 610 | |
---|
| 611 | } |
---|
| 612 | } |
---|
| 613 | } |
---|
| 614 | |
---|
| 615 | /**Function******************************************************************** |
---|
| 616 | |
---|
| 617 | Synopsis [ Generate initial score ] |
---|
| 618 | |
---|
| 619 | Description [ Generate initial score ] |
---|
| 620 | |
---|
| 621 | SideEffects [] |
---|
| 622 | |
---|
| 623 | SeeAlso [] |
---|
| 624 | |
---|
| 625 | ******************************************************************************/ |
---|
| 626 | void |
---|
| 627 | sat_InitScore(satManager_t *cm) |
---|
| 628 | { |
---|
| 629 | int objExist; |
---|
| 630 | int j, inverted; |
---|
| 631 | long *plit, v, nv, i; |
---|
| 632 | int size; |
---|
| 633 | int count0, count1; |
---|
| 634 | satArray_t *ordered, *newOrdered; |
---|
| 635 | satVariable_t *var; |
---|
| 636 | |
---|
| 637 | ordered = cm->orderedVariableArray; |
---|
| 638 | if(ordered == 0) |
---|
| 639 | ordered = sat_ArrayAlloc(cm->initNumVariables); |
---|
| 640 | else |
---|
| 641 | ordered->num = 0; |
---|
| 642 | cm->orderedVariableArray = ordered; |
---|
| 643 | |
---|
| 644 | objExist = 0; |
---|
| 645 | /** |
---|
| 646 | if(cm->obj && cm->obj->num) { |
---|
| 647 | sat_MarkTransitiveFaninForArray(cm, cm->obj, VisitedMask); |
---|
| 648 | objExist = 1; |
---|
| 649 | } |
---|
| 650 | **/ |
---|
| 651 | |
---|
| 652 | |
---|
| 653 | for(i=satNodeSize; i<cm->nodesArraySize; i+=satNodeSize) { |
---|
| 654 | v = i; |
---|
| 655 | if((SATflags(v) & IsBDDMask)) { |
---|
| 656 | continue; |
---|
| 657 | } |
---|
| 658 | if((SATflags(v) & IsCNFMask)) { |
---|
| 659 | size = SATnumLits(v); |
---|
| 660 | plit = (long*)SATfirstLit(v); |
---|
| 661 | for(j=0; j<size; j++, plit++) { |
---|
| 662 | nv = SATgetNode(*plit); |
---|
| 663 | inverted = !(SATisInverted(nv)); |
---|
| 664 | nv = SATnormalNode(nv); |
---|
| 665 | var = SATgetVariable(nv); |
---|
| 666 | var->litsCount[inverted]++; |
---|
| 667 | } |
---|
| 668 | continue; |
---|
| 669 | } |
---|
| 670 | if(!(SATflags(v) & CoiMask)) continue; |
---|
| 671 | if(!(SATflags(v) & VisitedMask) && objExist) continue; |
---|
| 672 | |
---|
| 673 | if(SATvalue(v) != 2 && SATlevel(v) == 0) continue; |
---|
| 674 | |
---|
| 675 | count0 = count1 = SATnFanout(v); |
---|
| 676 | if(count0 == 0 && SATleftChild(v) == 2 && SATrightChild(v) == 2) { |
---|
| 677 | count0 = 0; |
---|
| 678 | count1 = 0; |
---|
| 679 | } |
---|
| 680 | else if(SATleftChild(v) != 2) { |
---|
| 681 | count0 += 2; |
---|
| 682 | count1++; |
---|
| 683 | } |
---|
| 684 | else { |
---|
| 685 | count0 += 3; |
---|
| 686 | count1 += 3; |
---|
| 687 | } |
---|
| 688 | |
---|
| 689 | var = SATgetVariable(v); |
---|
| 690 | var->litsCount[0] += count0; |
---|
| 691 | var->litsCount[1] += count1; |
---|
| 692 | |
---|
| 693 | sat_ArrayInsert(ordered, v); |
---|
| 694 | } |
---|
| 695 | |
---|
| 696 | //Bing: |
---|
| 697 | if(cm->unitLits){ |
---|
| 698 | for(i=0; i<cm->unitLits->num; i++) { |
---|
| 699 | v = cm->unitLits->space[i]; |
---|
| 700 | v = SATnormalNode(v); |
---|
| 701 | SATflags(v) |= NewMask; |
---|
| 702 | } |
---|
| 703 | } |
---|
| 704 | |
---|
| 705 | if(cm->assertion) { |
---|
| 706 | for(i=0; i<cm->assertion->num; i++) { |
---|
| 707 | v = cm->assertion->space[i]; |
---|
| 708 | v = SATnormalNode(v); |
---|
| 709 | SATflags(v) |= NewMask; |
---|
| 710 | } |
---|
| 711 | } |
---|
| 712 | |
---|
| 713 | newOrdered = sat_ArrayAlloc((ordered->num) * 2); |
---|
| 714 | size = ordered->num; |
---|
| 715 | for(i=0; i<size; i++) { |
---|
| 716 | v = ordered->space[i]; |
---|
| 717 | var = SATgetVariable(v); |
---|
| 718 | var->scores[0] = var->lastLitsCount[0] = var->litsCount[0]; |
---|
| 719 | var->scores[1] = var->lastLitsCount[1] = var->litsCount[1]; |
---|
| 720 | |
---|
| 721 | if(SATflags(v) & NewMask); |
---|
| 722 | else if(var->scores[0] == 0 && var->scores[1] == 0 && !(SATflags(v) & NewMask)) { |
---|
| 723 | sat_ArrayInsert(cm->pureLits, (v)); |
---|
| 724 | } |
---|
| 725 | else if(var->scores[0] == 0 && !(SATflags(v) & NewMask)) { |
---|
| 726 | sat_ArrayInsert(cm->pureLits, (v)); |
---|
| 727 | } |
---|
| 728 | else if(var->scores[1] == 0 && !(SATflags(v) & NewMask)) { |
---|
| 729 | sat_ArrayInsert(cm->pureLits, SATnot(v)); |
---|
| 730 | } |
---|
| 731 | else { |
---|
| 732 | sat_ArrayInsert(newOrdered, v); |
---|
| 733 | sat_ArrayInsert(newOrdered, (var->scores[0] > var->scores[1]) ? var->scores[0] : var->scores[1]); |
---|
| 734 | } |
---|
| 735 | } |
---|
| 736 | |
---|
| 737 | //Bing: |
---|
| 738 | if(cm->unitLits){ |
---|
| 739 | for(i=0; i<cm->unitLits->num; i++) { |
---|
| 740 | v = cm->unitLits->space[i]; |
---|
| 741 | v = SATnormalNode(v); |
---|
| 742 | SATflags(v) &= ResetNewMask; |
---|
| 743 | } |
---|
| 744 | } |
---|
| 745 | |
---|
| 746 | if(cm->assertion) { |
---|
| 747 | for(i=0; i<cm->assertion->num; i++) { |
---|
| 748 | v = cm->assertion->space[i]; |
---|
| 749 | v = SATnormalNode(v); |
---|
| 750 | SATflags(v) &= ResetNewMask; |
---|
| 751 | } |
---|
| 752 | } |
---|
| 753 | |
---|
| 754 | cm->orderedVariableArray = ordered; |
---|
| 755 | size = newOrdered->num; |
---|
| 756 | qsort(newOrdered->space, size>>1, sizeof(long)*2, ScoreCompare); |
---|
| 757 | |
---|
| 758 | cm->currentVarPos = 0; |
---|
| 759 | ordered->num = 0; |
---|
| 760 | for(i=0; i<size; i++) { |
---|
| 761 | v = newOrdered->space[i]; |
---|
| 762 | var = SATgetVariable(v); |
---|
| 763 | var->pos = (i>>1); |
---|
| 764 | sat_ArrayInsert(ordered, v); |
---|
| 765 | i++; |
---|
| 766 | } |
---|
| 767 | |
---|
| 768 | sat_ArrayFree(newOrdered); |
---|
| 769 | |
---|
| 770 | /** |
---|
| 771 | if(cm->obj && cm->obj->num) { |
---|
| 772 | sat_UnmarkTransitiveFaninForArray( |
---|
| 773 | cm, cm->obj, VisitedMask, ResetVisitedMask); |
---|
| 774 | } |
---|
| 775 | **/ |
---|
| 776 | |
---|
| 777 | if(cm->option->verbose > 3) |
---|
| 778 | sat_PrintScore(cm); |
---|
| 779 | } |
---|
| 780 | |
---|
| 781 | /**Function******************************************************************** |
---|
| 782 | |
---|
| 783 | Synopsis [ Generate initial score for CNF and AIG ] |
---|
| 784 | |
---|
| 785 | Description [ Generate initial score for CNF and AIG] |
---|
| 786 | |
---|
| 787 | SideEffects [] |
---|
| 788 | |
---|
| 789 | SeeAlso [] |
---|
| 790 | |
---|
| 791 | ******************************************************************************/ |
---|
| 792 | void |
---|
| 793 | sat_InitScoreForMixed(satManager_t *cm) |
---|
| 794 | { |
---|
| 795 | int j, inverted; |
---|
| 796 | long *plit, v, nv, i; |
---|
| 797 | int size; |
---|
| 798 | int count0, count1; |
---|
| 799 | satArray_t *ordered, *newOrdered; |
---|
| 800 | satVariable_t *var; |
---|
| 801 | |
---|
| 802 | ordered = cm->orderedVariableArray; |
---|
| 803 | if(ordered == 0) |
---|
| 804 | ordered = sat_ArrayAlloc(cm->initNumVariables); |
---|
| 805 | else |
---|
| 806 | ordered->num = 0; |
---|
| 807 | cm->orderedVariableArray = ordered; |
---|
| 808 | |
---|
| 809 | /** |
---|
| 810 | objExist = 0; |
---|
| 811 | if(cm->obj && cm->obj->num) { |
---|
| 812 | sat_MarkTransitiveFaninForArray(cm, cm->obj, VisitedMask); |
---|
| 813 | objExist = 1; |
---|
| 814 | } |
---|
| 815 | **/ |
---|
| 816 | |
---|
| 817 | |
---|
| 818 | for(i=satNodeSize; i<cm->nodesArraySize; i+=satNodeSize) { |
---|
| 819 | v = i; |
---|
| 820 | if((SATflags(v) & IsBDDMask)) { |
---|
| 821 | continue; |
---|
| 822 | } |
---|
| 823 | if((SATflags(v) & IsCNFMask)) { |
---|
| 824 | size = SATnumLits(v); |
---|
| 825 | plit =(long*) SATfirstLit(v); |
---|
| 826 | for(j=0; j<size; j++, plit++) { |
---|
| 827 | nv = SATgetNode(*plit); |
---|
| 828 | inverted = !(SATisInverted(nv)); |
---|
| 829 | nv = SATnormalNode(nv); |
---|
| 830 | var = SATgetVariable(nv); |
---|
| 831 | var->litsCount[inverted]++; |
---|
| 832 | } |
---|
| 833 | continue; |
---|
| 834 | } |
---|
| 835 | if(!(SATflags(v) & CoiMask)) continue; |
---|
| 836 | /** |
---|
| 837 | if(!(SATflags(v) & VisitedMask) && objExist) continue; |
---|
| 838 | **/ |
---|
| 839 | |
---|
| 840 | if(SATvalue(v) != 2 && SATlevel(v) == 0) continue; |
---|
| 841 | |
---|
| 842 | count0 = count1 = SATnFanout(v); |
---|
| 843 | if(count0 == 0 && SATleftChild(v) == 2 && SATrightChild(v) == 2) { |
---|
| 844 | count0 = 0; |
---|
| 845 | count1 = 0; |
---|
| 846 | } |
---|
| 847 | else if(SATleftChild(v) != 2) { |
---|
| 848 | count0 += 2; |
---|
| 849 | count1++; |
---|
| 850 | } |
---|
| 851 | else { |
---|
| 852 | count0 += 3; |
---|
| 853 | count1 += 3; |
---|
| 854 | } |
---|
| 855 | |
---|
| 856 | var = SATgetVariable(v); |
---|
| 857 | var->litsCount[0] += count0; |
---|
| 858 | var->litsCount[1] += count1; |
---|
| 859 | |
---|
| 860 | sat_ArrayInsert(ordered, v); |
---|
| 861 | } |
---|
| 862 | |
---|
| 863 | for(i=0; i<cm->unitLits->num; i++) { |
---|
| 864 | v = cm->unitLits->space[i]; |
---|
| 865 | v = SATnormalNode(v); |
---|
| 866 | SATflags(v) |= NewMask; |
---|
| 867 | } |
---|
| 868 | if(cm->assertion) { |
---|
| 869 | for(i=0; i<cm->assertion->num; i++) { |
---|
| 870 | v = cm->assertion->space[i]; |
---|
| 871 | v = SATnormalNode(v); |
---|
| 872 | SATflags(v) |= NewMask; |
---|
| 873 | } |
---|
| 874 | } |
---|
| 875 | |
---|
| 876 | newOrdered = sat_ArrayAlloc((ordered->num) * 2); |
---|
| 877 | size = ordered->num; |
---|
| 878 | for(i=0; i<size; i++) { |
---|
| 879 | v = ordered->space[i]; |
---|
| 880 | var = SATgetVariable(v); |
---|
| 881 | var->scores[0] = var->lastLitsCount[0] = var->litsCount[0]; |
---|
| 882 | var->scores[1] = var->lastLitsCount[1] = var->litsCount[1]; |
---|
| 883 | |
---|
| 884 | if(SATflags(v) & NewMask); |
---|
| 885 | else if(var->scores[0] == 0 && var->scores[1] == 0 && !(SATflags(v) & NewMask)) { |
---|
| 886 | sat_ArrayInsert(cm->pureLits, (v)); |
---|
| 887 | } |
---|
| 888 | else if(var->scores[0] == 0 && !(SATflags(v) & NewMask)) { |
---|
| 889 | sat_ArrayInsert(cm->pureLits, (v)); |
---|
| 890 | } |
---|
| 891 | else if(var->scores[1] == 0 && !(SATflags(v) & NewMask)) { |
---|
| 892 | sat_ArrayInsert(cm->pureLits, SATnot(v)); |
---|
| 893 | } |
---|
| 894 | else { |
---|
| 895 | sat_ArrayInsert(newOrdered, v); |
---|
| 896 | sat_ArrayInsert(newOrdered, (var->scores[0] > var->scores[1]) ? var->scores[0] : var->scores[1]); |
---|
| 897 | } |
---|
| 898 | } |
---|
| 899 | |
---|
| 900 | for(i=0; i<cm->unitLits->num; i++) { |
---|
| 901 | v = cm->unitLits->space[i]; |
---|
| 902 | v = SATnormalNode(v); |
---|
| 903 | SATflags(v) &= ResetNewMask; |
---|
| 904 | } |
---|
| 905 | if(cm->assertion) { |
---|
| 906 | for(i=0; i<cm->assertion->num; i++) { |
---|
| 907 | v = cm->assertion->space[i]; |
---|
| 908 | v = SATnormalNode(v); |
---|
| 909 | SATflags(v) &= ResetNewMask; |
---|
| 910 | } |
---|
| 911 | } |
---|
| 912 | |
---|
| 913 | cm->orderedVariableArray = ordered; |
---|
| 914 | size = newOrdered->num; |
---|
| 915 | qsort(newOrdered->space, size>>1, sizeof(long)*2, ScoreCompare); |
---|
| 916 | |
---|
| 917 | cm->currentVarPos = 0; |
---|
| 918 | ordered->num = 0; |
---|
| 919 | for(i=0; i<size; i++) { |
---|
| 920 | v = newOrdered->space[i]; |
---|
| 921 | var = SATgetVariable(v); |
---|
| 922 | var->pos = (i>>1); |
---|
| 923 | sat_ArrayInsert(ordered, v); |
---|
| 924 | i++; |
---|
| 925 | } |
---|
| 926 | |
---|
| 927 | sat_ArrayFree(newOrdered); |
---|
| 928 | |
---|
| 929 | /** |
---|
| 930 | if(cm->obj && cm->obj->num) { |
---|
| 931 | sat_UnmarkTransitiveFaninForArray( |
---|
| 932 | cm, cm->obj, VisitedMask, ResetVisitedMask); |
---|
| 933 | } |
---|
| 934 | **/ |
---|
| 935 | |
---|
| 936 | if(cm->option->verbose > 3) |
---|
| 937 | sat_PrintScore(cm); |
---|
| 938 | |
---|
| 939 | } |
---|
| 940 | /**Function******************************************************************** |
---|
| 941 | |
---|
| 942 | Synopsis [ Compare score to sort variable array] |
---|
| 943 | |
---|
| 944 | Description [ Compare score to sort variable array] |
---|
| 945 | |
---|
| 946 | SideEffects [] |
---|
| 947 | |
---|
| 948 | SeeAlso [] |
---|
| 949 | |
---|
| 950 | ******************************************************************************/ |
---|
| 951 | static int |
---|
| 952 | ScoreCompare( |
---|
| 953 | const void * node1, |
---|
| 954 | const void * node2) |
---|
| 955 | { |
---|
| 956 | int v1; |
---|
| 957 | int v2; |
---|
| 958 | int s1, s2; |
---|
| 959 | |
---|
| 960 | v1 = *(int *)(node1); |
---|
| 961 | v2 = *(int *)(node2); |
---|
| 962 | s1 = *((int *)(node1) + 1); |
---|
| 963 | s2 = *((int *)(node2) + 1); |
---|
| 964 | /** |
---|
| 965 | var1 = SatCm->variableArray[SATnodeID(v1)]; |
---|
| 966 | var2 = SatCm->variableArray[SATnodeID(v2)]; |
---|
| 967 | s1 = (var1.scores[0] > var1.scores[1]) ? var1.scores[0] : var1.scores[1]; |
---|
| 968 | s2 = (var2.scores[0] > var2.scores[1]) ? var2.scores[0] : var2.scores[1]; |
---|
| 969 | **/ |
---|
| 970 | if(s1 == s2) { |
---|
| 971 | return(v1 > v2); |
---|
| 972 | } |
---|
| 973 | return(s1 < s2); |
---|
| 974 | } |
---|