1 | /**CFile*********************************************************************** |
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2 | |
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3 | FileName [puresatArosat.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 | |
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49 | #include "puresatInt.h" |
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50 | /*---------------------------------------------------------------------------*/ |
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51 | /* Constant declarations */ |
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52 | /*---------------------------------------------------------------------------*/ |
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53 | |
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54 | /*---------------------------------------------------------------------------*/ |
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55 | /* Type declarations */ |
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56 | /*---------------------------------------------------------------------------*/ |
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57 | |
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58 | |
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59 | /*---------------------------------------------------------------------------*/ |
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60 | /* Structure declarations */ |
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61 | /*---------------------------------------------------------------------------*/ |
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62 | |
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63 | |
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64 | /*---------------------------------------------------------------------------*/ |
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65 | /* Variable declarations */ |
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66 | /*---------------------------------------------------------------------------*/ |
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67 | |
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68 | /*---------------------------------------------------------------------------*/ |
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69 | /* Macro declarations */ |
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70 | /*---------------------------------------------------------------------------*/ |
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71 | |
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72 | /**AutomaticStart*************************************************************/ |
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73 | |
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74 | /*---------------------------------------------------------------------------*/ |
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75 | /* Static function prototypes */ |
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76 | /*---------------------------------------------------------------------------*/ |
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77 | |
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78 | |
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79 | /**Function******************************************************************** |
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80 | |
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81 | Synopsis [comparing score for sorting] |
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82 | |
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83 | Description [] |
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84 | |
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85 | SideEffects [] |
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86 | |
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87 | SeeAlso [] |
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88 | |
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89 | ******************************************************************************/ |
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90 | |
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91 | static int |
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92 | ScoreCompare( |
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93 | const void * node1, |
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94 | const void * node2) |
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95 | { |
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96 | int v1; |
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97 | int v2; |
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98 | int s1, s2; |
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99 | |
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100 | v1 = *(int *)(node1); |
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101 | v2 = *(int *)(node2); |
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102 | s1 = *((int *)(node1) + 1); |
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103 | s2 = *((int *)(node2) + 1); |
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104 | |
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105 | if(s1 == s2) { |
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106 | return(v1 > v2); |
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107 | } |
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108 | return(s1 < s2); |
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109 | } |
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110 | |
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111 | /**AutomaticEnd***************************************************************/ |
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112 | |
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113 | /*---------------------------------------------------------------------------*/ |
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114 | /* Definition of exported functions */ |
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115 | /*---------------------------------------------------------------------------*/ |
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116 | |
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117 | |
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118 | /*---------------------------------------------------------------------------*/ |
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119 | /* Definition of internal functions */ |
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120 | /*---------------------------------------------------------------------------*/ |
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121 | |
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122 | |
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123 | typedef int (*ASIMPLY_FN) |
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124 | (satManager_t *cm, satLevel_t *d, long v, long left, long right); |
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125 | |
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126 | |
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127 | ASIMPLY_FN ASImplicationFN[64]= { |
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128 | AS_ImplyStop, /* 0 */ |
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129 | AS_ImplyConflict, /* 1 */ |
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130 | AS_ImplyLeftForward, /* 2 */ |
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131 | AS_ImplyLeftForward, /* 3 */ |
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132 | AS_ImplyStop, /* 4 */ |
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133 | AS_ImplyConflict, /* 5 */ |
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134 | AS_ImplyLeftForward, /* 6 */ |
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135 | AS_ImplyLeftForward, /* 7 */ |
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136 | AS_ImplySplit, /* 8 */ |
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137 | AS_ImplyConflict, /* 9 */ |
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138 | AS_ImplyLeftForward, /* 10 */ |
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139 | AS_ImplyLeftForward, /* 11 */ |
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140 | AS_ImplySplit, /* 12 */ |
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141 | AS_ImplyConflict, /* 13 */ |
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142 | AS_ImplyLeftForward, /* 14 */ |
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143 | AS_ImplyLeftForward, /* 15 */ |
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144 | AS_ImplyStop, /* 16 */ |
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145 | AS_ImplyConflict, /* 17 */ |
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146 | AS_ImplyRightForward, /* 18 */ |
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147 | AS_ImplyRightForward, /* 19 */ |
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148 | AS_ImplyConflict, /* 20 */ |
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149 | AS_ImplyStop, /* 21 */ |
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150 | AS_ImplyForwardOne, /* 22 */ |
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151 | AS_ImplyForwardOne, /* 23 */ |
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152 | AS_ImplyPropRight, /* 24 */ |
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153 | AS_ImplyPropRightOne, /* 25 */ |
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154 | AS_ImplyStop, /* 26 */ |
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155 | AS_ImplyStop, /* 27 */ |
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156 | AS_ImplyPropRight, /* 28 */ |
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157 | AS_ImplyPropRightOne, /* 29 */ |
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158 | AS_ImplyStop, /* 30 */ |
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159 | AS_ImplyStop, /* 31 */ |
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160 | AS_ImplySplit, /* 32 */ |
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161 | AS_ImplyConflict, /* 33 */ |
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162 | AS_ImplyRightForward, /* 34 */ |
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163 | AS_ImplyRightForward, /* 35 */ |
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164 | AS_ImplyPropLeft, /* 36 */ |
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165 | AS_ImplyPropLeftOne, /* 37 */ |
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166 | AS_ImplyStop, /* 38 */ |
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167 | AS_ImplyStop, /* 39 */ |
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168 | AS_ImplySplit, /* 40 */ |
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169 | AS_ImplyPropLeftRight, /* 41 */ |
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170 | AS_ImplyStop, /* 42 */ |
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171 | AS_ImplyStop, /* 43 */ |
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172 | AS_ImplySplit, /* 44 */ |
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173 | AS_ImplyPropLeftRight, /* 45 */ |
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174 | AS_ImplyStop, /* 46 */ |
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175 | AS_ImplyStop, /* 47 */ |
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176 | AS_ImplySplit, /* 48 */ |
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177 | AS_ImplyConflict, /* 49 */ |
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178 | AS_ImplyRightForward, /* 50 */ |
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179 | AS_ImplyRightForward, /* 51 */ |
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180 | AS_ImplyPropLeft, /* 52 */ |
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181 | AS_ImplyPropLeftOne, /* 53 */ |
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182 | AS_ImplyStop, /* 54 */ |
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183 | AS_ImplyStop, /* 55 */ |
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184 | AS_ImplySplit, /* 56 */ |
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185 | AS_ImplyPropLeftRight, /* 57 */ |
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186 | AS_ImplyStop, /* 58 */ |
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187 | AS_ImplyStop, /* 59 */ |
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188 | AS_ImplySplit, /* 60 */ |
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189 | AS_ImplyPropLeftRight, /* 61 */ |
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190 | AS_ImplyStop, /* 62 */ |
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191 | AS_ImplyStop, /* 63 */ |
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192 | }; |
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193 | |
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194 | |
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195 | |
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196 | /*---------------------------------------------------------------------------*/ |
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197 | /* Definition of exported functions */ |
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198 | /*---------------------------------------------------------------------------*/ |
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199 | |
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200 | |
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201 | /**Function******************************************************************** |
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202 | |
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203 | Synopsis [No further implcation when this function is called.] |
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204 | |
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205 | Description [No further implcation when this function is called. |
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206 | 0 0 0 1 |
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207 | | | | | |
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208 | --- --- --- --- |
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209 | / \ / \ / \ / \ |
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210 | 0 X X 0 0 0 1 1 |
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211 | ] |
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212 | |
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213 | SideEffects [] |
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214 | |
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215 | SeeAlso [] |
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216 | |
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217 | ******************************************************************************/ |
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218 | |
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219 | int |
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220 | AS_ImplyStop( |
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221 | satManager_t *cm, |
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222 | satLevel_t *d, |
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223 | long v, |
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224 | long left, |
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225 | long right) |
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226 | { |
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227 | return(0); |
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228 | } |
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229 | |
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230 | /**Function******************************************************************** |
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231 | |
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232 | Synopsis [No further implcation when this function is called.] |
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233 | |
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234 | Description [No further implcation when this function is called. |
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235 | and need split on output. |
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236 | 0 |
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237 | | |
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238 | --- |
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239 | / \ |
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240 | X X |
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241 | ] |
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242 | |
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243 | SideEffects [] |
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244 | |
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245 | SeeAlso [] |
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246 | |
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247 | ******************************************************************************/ |
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248 | int |
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249 | AS_ImplySplit( |
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250 | satManager_t *cm, |
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251 | satLevel_t *d, |
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252 | long v, |
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253 | long left, |
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254 | long right) |
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255 | { |
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256 | return(0); |
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257 | } |
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258 | |
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259 | /**Function******************************************************************** |
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260 | |
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261 | Synopsis [The conflict happens.] |
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262 | |
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263 | Description [The conflict happens when |
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264 | 0 1 1 1 1 |
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265 | | | | | | |
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266 | --- --- --- --- --- |
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267 | / \ / \ / \ / \ / \ |
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268 | 1 1 X 0 0 X 1 0 0 1 |
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269 | ] |
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270 | |
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271 | SideEffects [] |
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272 | |
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273 | SeeAlso [] |
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274 | |
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275 | ******************************************************************************/ |
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276 | int |
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277 | AS_ImplyConflict( |
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278 | satManager_t *cm, |
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279 | satLevel_t *d, |
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280 | long v, |
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281 | long left, |
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282 | long right) |
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283 | { |
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284 | if(left != 2) { |
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285 | d->conflict = SATnormalNode(v); |
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286 | } |
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287 | return(0); |
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288 | } |
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289 | |
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290 | |
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291 | /**Function******************************************************************** |
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292 | |
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293 | Synopsis [A value implied to output due to left child.] |
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294 | |
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295 | Description [A value implied to output due to left child |
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296 | X X |
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297 | | | |
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298 | --- --- |
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299 | / \ / \ |
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300 | 0 1 0 X |
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301 | ] |
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302 | |
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303 | SideEffects [] |
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304 | |
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305 | SeeAlso [] |
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306 | |
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307 | ******************************************************************************/ |
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308 | int |
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309 | AS_ImplyLeftForward( |
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310 | satManager_t *cm, |
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311 | satLevel_t *d, |
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312 | long v, |
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313 | long left, |
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314 | long right) |
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315 | { |
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316 | if(sat_ASImp(cm,d,v,0)) |
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317 | return(0); |
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318 | |
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319 | v = SATnormalNode(v); |
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320 | left = SATnormalNode(left); |
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321 | |
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322 | SATvalue(v) = 0; |
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323 | SATmakeImplied(v, d); |
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324 | SATante(v) = left; |
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325 | |
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326 | sat_Enqueue(cm->queue, v); |
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327 | SATflags(v) |= InQueueMask; |
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328 | |
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329 | SATflags(v) |= (SATflags(left) & ObjMask); |
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330 | |
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331 | cm->each->nAigImplications++; |
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332 | |
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333 | return(0); |
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334 | } |
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335 | |
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336 | /**Function******************************************************************** |
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337 | |
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338 | Synopsis [A value implied to output due to right child.] |
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339 | |
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340 | Description [A value implied to output due to right child |
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341 | X X |
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342 | | | |
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343 | --- --- |
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344 | / \ / \ |
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345 | 1 0 X 0 |
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346 | ] |
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347 | |
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348 | SideEffects [] |
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349 | |
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350 | SeeAlso [] |
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351 | |
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352 | ******************************************************************************/ |
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353 | int |
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354 | AS_ImplyRightForward( |
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355 | satManager_t *cm, |
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356 | satLevel_t *d, |
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357 | long v, |
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358 | long left, |
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359 | long right) |
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360 | { |
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361 | |
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362 | if(sat_ASImp(cm,d,v,0)) |
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363 | return(0); |
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364 | |
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365 | v = SATnormalNode(v); |
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366 | right = SATnormalNode(right); |
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367 | |
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368 | SATvalue(v) = 0; |
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369 | SATmakeImplied(v, d); |
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370 | SATante(v) = right; |
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371 | |
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372 | sat_Enqueue(cm->queue, v); |
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373 | SATflags(v) |= InQueueMask; |
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374 | |
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375 | SATflags(v) |= (SATflags(right) & ObjMask); |
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376 | cm->each->nAigImplications++; |
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377 | |
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378 | return(0); |
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379 | } |
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380 | |
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381 | |
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382 | /**Function******************************************************************** |
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383 | |
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384 | Synopsis [A value implied to output due to both child.] |
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385 | |
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386 | Description [A value implied to output due to both child |
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387 | X |
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388 | | |
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389 | --- |
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390 | / \ |
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391 | 1 1 |
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392 | ] |
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393 | |
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394 | SideEffects [] |
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395 | |
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396 | SeeAlso [] |
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397 | |
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398 | ******************************************************************************/ |
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399 | int |
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400 | AS_ImplyForwardOne( |
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401 | satManager_t *cm, |
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402 | satLevel_t *d, |
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403 | long v, |
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404 | long left, |
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405 | long right) |
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406 | { |
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407 | |
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408 | if(sat_ASImp(cm,d,v,1)) |
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409 | return(0); |
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410 | |
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411 | v = SATnormalNode(v); |
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412 | left = SATnormalNode(left); |
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413 | right = SATnormalNode(right); |
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414 | |
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415 | SATvalue(v) = 1; |
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416 | SATmakeImplied(v, d); |
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417 | SATante(v) = right; |
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418 | SATante2(v) = left; |
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419 | |
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420 | sat_Enqueue(cm->queue, v); |
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421 | SATflags(v) |= InQueueMask; |
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422 | |
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423 | SATflags(v) |= (SATflags(right) & ObjMask); |
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424 | SATflags(v) |= (SATflags(left) & ObjMask); |
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425 | cm->each->nAigImplications++; |
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426 | |
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427 | return(0); |
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428 | } |
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429 | |
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430 | /**Function******************************************************************** |
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431 | |
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432 | Synopsis [A value implied to right child due to both output and left.] |
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433 | |
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434 | Description [A value implied to right child due to both output and left |
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435 | 0 |
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436 | | |
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437 | --- |
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438 | / \ |
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439 | 1 X |
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440 | ] |
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441 | |
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442 | SideEffects [] |
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443 | |
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444 | SeeAlso [] |
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445 | |
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446 | ******************************************************************************/ |
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447 | int |
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448 | AS_ImplyPropRight( |
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449 | satManager_t *cm, |
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450 | satLevel_t *d, |
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451 | long v, |
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452 | long left, |
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453 | long right) |
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454 | { |
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455 | int isInverted; |
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456 | |
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457 | isInverted = SATisInverted(right); |
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458 | |
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459 | |
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460 | if(sat_ASImp(cm,d,right, isInverted)) |
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461 | return(0); |
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462 | |
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463 | v = SATnormalNode(v); |
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464 | left = SATnormalNode(left); |
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465 | right = SATnormalNode(right); |
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466 | |
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467 | SATmakeImplied(right, d); |
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468 | SATvalue(right) = isInverted; |
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469 | |
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470 | SATante(right) = left; |
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471 | SATante2(right) = v; |
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472 | |
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473 | sat_Enqueue(cm->queue, right); |
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474 | SATflags(right) |= InQueueMask; |
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475 | |
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476 | SATflags(right) |= (SATflags(left) & ObjMask); |
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477 | SATflags(right) |= (SATflags(v) & ObjMask); |
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478 | cm->each->nAigImplications++; |
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479 | |
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480 | return(0); |
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481 | } |
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482 | |
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483 | /**Function******************************************************************** |
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484 | |
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485 | Synopsis [A value implied to right child due to both output and left.] |
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486 | |
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487 | Description [A value implied to right child due to both output and left |
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488 | 1 |
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489 | | |
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490 | --- |
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491 | / \ |
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492 | 1 X |
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493 | ] |
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494 | |
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495 | SideEffects [] |
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496 | |
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497 | SeeAlso [] |
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498 | |
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499 | ******************************************************************************/ |
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500 | int |
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501 | AS_ImplyPropRightOne( |
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502 | satManager_t *cm, |
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503 | satLevel_t *d, |
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504 | long v, |
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505 | long left, |
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506 | long right) |
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507 | { |
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508 | int isInverted; |
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509 | |
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510 | |
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511 | if(sat_ASImp(cm,d,right,!SATisInverted(right))) |
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512 | return(0); |
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513 | |
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514 | isInverted = SATisInverted(right); |
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515 | v = SATnormalNode(v); |
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516 | left = SATnormalNode(left); |
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517 | right = SATnormalNode(right); |
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518 | |
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519 | SATmakeImplied(right, d); |
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520 | |
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521 | SATante(right) = v; |
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522 | |
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523 | SATvalue(right) = !isInverted; |
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524 | |
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525 | sat_Enqueue(cm->queue, right); |
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526 | SATflags(right) |= InQueueMask; |
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527 | |
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528 | SATflags(right) |= (SATflags(v) & ObjMask); |
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529 | cm->each->nAigImplications++; |
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530 | |
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531 | return(0); |
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532 | } |
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533 | |
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534 | |
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535 | /**Function******************************************************************** |
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536 | |
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537 | Synopsis [A value implied to left child due to both output and right.] |
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538 | |
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539 | Description [A value implied to left child due to both output and right |
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540 | 0 |
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541 | | |
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542 | --- |
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543 | / \ |
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544 | X 1 |
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545 | ] |
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546 | |
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547 | SideEffects [] |
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548 | |
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549 | SeeAlso [] |
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550 | |
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551 | ******************************************************************************/ |
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552 | int |
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553 | AS_ImplyPropLeft( |
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554 | satManager_t *cm, |
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555 | satLevel_t *d, |
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556 | long v, |
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557 | long left, |
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558 | long right) |
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559 | { |
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560 | int isInverted; |
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561 | |
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562 | |
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563 | if(sat_ASImp(cm,d,left,SATisInverted(left))) |
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564 | return(0); |
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565 | |
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566 | isInverted = SATisInverted(left); |
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567 | v = SATnormalNode(v); |
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568 | left = SATnormalNode(left); |
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569 | right = SATnormalNode(right); |
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570 | |
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571 | SATmakeImplied(left, d); |
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572 | |
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573 | SATante(left) = v; |
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574 | SATante2(left) = right; |
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575 | |
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576 | SATvalue(left) = isInverted; |
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577 | |
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578 | sat_Enqueue(cm->queue, left); |
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579 | SATflags(left) |= InQueueMask; |
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580 | |
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581 | SATflags(left) |= (SATflags(v) & ObjMask); |
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582 | SATflags(left) |= (SATflags(right) & ObjMask); |
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583 | cm->each->nAigImplications++; |
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584 | |
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585 | return(0); |
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586 | } |
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587 | |
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588 | |
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589 | |
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590 | /**Function******************************************************************** |
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591 | |
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592 | Synopsis [A value implied to left child due to both output and right.] |
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593 | |
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594 | Description [A value implied to left child due to both output and right |
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595 | 1 |
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596 | | |
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597 | --- |
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598 | / \ |
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599 | X 1 |
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600 | ] |
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601 | |
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602 | SideEffects [] |
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603 | |
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604 | SeeAlso [] |
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605 | |
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606 | ******************************************************************************/ |
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607 | int |
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608 | AS_ImplyPropLeftOne( |
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609 | satManager_t *cm, |
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610 | satLevel_t *d, |
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611 | long v, |
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612 | long left, |
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613 | long right) |
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614 | { |
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615 | int isInverted; |
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616 | |
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617 | |
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618 | if(sat_ASImp(cm,d,left,!SATisInverted(left))) |
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619 | return(0); |
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620 | |
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621 | isInverted = SATisInverted(left); |
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622 | v = SATnormalNode(v); |
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623 | left = SATnormalNode(left); |
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624 | right = SATnormalNode(right); |
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625 | |
---|
626 | SATmakeImplied(left, d); |
---|
627 | |
---|
628 | SATante(left) = v; |
---|
629 | |
---|
630 | SATvalue(left) = !isInverted; |
---|
631 | |
---|
632 | sat_Enqueue(cm->queue, left); |
---|
633 | SATflags(left) |= InQueueMask; |
---|
634 | |
---|
635 | SATflags(left) |= (SATflags(v) & ObjMask); |
---|
636 | cm->each->nAigImplications++; |
---|
637 | |
---|
638 | return(0); |
---|
639 | } |
---|
640 | |
---|
641 | |
---|
642 | |
---|
643 | /**Function******************************************************************** |
---|
644 | |
---|
645 | Synopsis [A value implied to left and right child due to output.] |
---|
646 | |
---|
647 | Description [A value implied to left and right child due to output |
---|
648 | 1 |
---|
649 | | |
---|
650 | --- |
---|
651 | / \ |
---|
652 | X X |
---|
653 | ] |
---|
654 | |
---|
655 | SideEffects [] |
---|
656 | |
---|
657 | SeeAlso [] |
---|
658 | |
---|
659 | ******************************************************************************/ |
---|
660 | int |
---|
661 | AS_ImplyPropLeftRight( |
---|
662 | satManager_t *cm, |
---|
663 | satLevel_t *d, |
---|
664 | long v, |
---|
665 | long left, |
---|
666 | long right) |
---|
667 | { |
---|
668 | int isLeftInverted; |
---|
669 | int isRightInverted; |
---|
670 | |
---|
671 | int lImp=1,rImp=1; |
---|
672 | |
---|
673 | if(left == right) return 1; |
---|
674 | |
---|
675 | |
---|
676 | if(sat_ASImp(cm,d,left,!SATisInverted(left))) |
---|
677 | lImp = 0; |
---|
678 | if(sat_ASImp(cm,d,right,!SATisInverted(right))) |
---|
679 | rImp = 0; |
---|
680 | |
---|
681 | |
---|
682 | isLeftInverted = SATisInverted(left); |
---|
683 | isRightInverted = SATisInverted(right); |
---|
684 | |
---|
685 | v = SATnormalNode(v); |
---|
686 | left = SATnormalNode(left); |
---|
687 | right = SATnormalNode(right); |
---|
688 | |
---|
689 | if(lImp){ |
---|
690 | SATmakeImplied(left, d); |
---|
691 | SATante(left) = v; |
---|
692 | SATvalue(left) = !isLeftInverted; |
---|
693 | sat_Enqueue(cm->queue, left); |
---|
694 | SATflags(left) |= InQueueMask; |
---|
695 | SATflags(left) |= (SATflags(v) & ObjMask); |
---|
696 | cm->each->nAigImplications ++; |
---|
697 | } |
---|
698 | |
---|
699 | if(rImp){ |
---|
700 | SATmakeImplied(right, d); |
---|
701 | SATante(right) = v; |
---|
702 | SATvalue(right) = !isRightInverted; |
---|
703 | sat_Enqueue(cm->queue, right); |
---|
704 | SATflags(right) |= InQueueMask; |
---|
705 | SATflags(right) |= (SATflags(v) & ObjMask); |
---|
706 | cm->each->nAigImplications ++; |
---|
707 | } |
---|
708 | |
---|
709 | return(0); |
---|
710 | } |
---|
711 | |
---|
712 | /**Function******************************************************************** |
---|
713 | |
---|
714 | Synopsis [erase previous assignments by arosat] |
---|
715 | |
---|
716 | Description [] |
---|
717 | |
---|
718 | SideEffects [] |
---|
719 | |
---|
720 | SeeAlso [] |
---|
721 | |
---|
722 | ******************************************************************************/ |
---|
723 | |
---|
724 | void |
---|
725 | AS_Undo( |
---|
726 | satManager_t *cm, |
---|
727 | satLevel_t *d) |
---|
728 | { |
---|
729 | satArray_t *implied, *satisfied; |
---|
730 | int size, i; |
---|
731 | long *space, v; |
---|
732 | satVariable_t *var; |
---|
733 | int dfs; |
---|
734 | |
---|
735 | implied = d->implied; |
---|
736 | space = implied->space; |
---|
737 | size = implied->num; |
---|
738 | for(i=0; i<size; i++, space++) { |
---|
739 | v = *space; |
---|
740 | |
---|
741 | SATvalue(v) = 2; |
---|
742 | SATflags(v) &= ResetNewVisitedObjInQueueMask; |
---|
743 | SATante(v) = 0; |
---|
744 | SATante2(v) = 0; |
---|
745 | SATlevel(v) = -1; |
---|
746 | |
---|
747 | |
---|
748 | if(SATflags(SATnormalNode(v))&AssignedMask){ |
---|
749 | SATflags(SATnormalNode(v))&=ResetAssignedMask; |
---|
750 | var=SATgetVariable(v); |
---|
751 | dfs = var->scores[0]/SCOREUNIT; |
---|
752 | cm->assignedArray[dfs]--; |
---|
753 | |
---|
754 | #if DBG |
---|
755 | assert(cm->assignedArray[dfs]>=0); |
---|
756 | #endif |
---|
757 | } |
---|
758 | |
---|
759 | } |
---|
760 | |
---|
761 | cm->implicatedSoFar -= size; |
---|
762 | |
---|
763 | if(d->satisfied) { |
---|
764 | satisfied = d->implied; |
---|
765 | space = satisfied->space; |
---|
766 | size = satisfied->num; |
---|
767 | for(i=0; i<size; i++, space++) { |
---|
768 | v = *space; |
---|
769 | |
---|
770 | SATflags(v) &= ResetBDDSatisfiedMask; |
---|
771 | } |
---|
772 | d->satisfied->num = 0; |
---|
773 | } |
---|
774 | if(d->level > 0) { |
---|
775 | if((cm->decisionHead[d->level-1]).currentVarPos < cm->currentVarPos) |
---|
776 | cm->currentVarPos = (cm->decisionHead[d->level-1]).currentVarPos; |
---|
777 | } |
---|
778 | else |
---|
779 | cm->currentVarPos = d->currentVarPos; |
---|
780 | |
---|
781 | d->implied->num = 0; |
---|
782 | d->currentVarPos = 0; |
---|
783 | |
---|
784 | d->conflict = 0; |
---|
785 | |
---|
786 | |
---|
787 | |
---|
788 | } |
---|
789 | |
---|
790 | |
---|
791 | /**Function******************************************************************** |
---|
792 | |
---|
793 | Synopsis [implication for cnf] |
---|
794 | |
---|
795 | Description [] |
---|
796 | |
---|
797 | SideEffects [] |
---|
798 | |
---|
799 | SeeAlso [] |
---|
800 | |
---|
801 | ******************************************************************************/ |
---|
802 | |
---|
803 | void |
---|
804 | AS_ImplyCNF( |
---|
805 | satManager_t *cm, |
---|
806 | satLevel_t *d, |
---|
807 | long v, |
---|
808 | satArray_t *wl) |
---|
809 | { |
---|
810 | int size, i, j; |
---|
811 | long *space; |
---|
812 | long lit, *plit, *tplit; |
---|
813 | int dir; |
---|
814 | long nv, tv, *oplit, *wlit; |
---|
815 | int isInverted, value; |
---|
816 | int tsize, inverted; |
---|
817 | long cur, clit; |
---|
818 | satStatistics_t *stats; |
---|
819 | satOption_t *option; |
---|
820 | satQueue_t *Q; |
---|
821 | satVariable_t *var; |
---|
822 | |
---|
823 | long tmpv; |
---|
824 | |
---|
825 | size = wl->num; |
---|
826 | space = wl->space; |
---|
827 | Q = cm->queue; |
---|
828 | stats = cm->each; |
---|
829 | option = cm->option; |
---|
830 | nv = 0; |
---|
831 | wlit = 0; |
---|
832 | |
---|
833 | for(i=0; i<size; i++) { |
---|
834 | plit = (long*)space[i]; |
---|
835 | |
---|
836 | if(plit == 0 || *plit == 0) { |
---|
837 | size--; |
---|
838 | space[i] = space[size]; |
---|
839 | i--; |
---|
840 | continue; |
---|
841 | } |
---|
842 | |
---|
843 | lit = *plit; |
---|
844 | dir = SATgetDir(lit); |
---|
845 | oplit = plit; |
---|
846 | |
---|
847 | while(1) { |
---|
848 | oplit += dir; |
---|
849 | if(*oplit <=0) { |
---|
850 | if(dir == 1) nv =- (*oplit); |
---|
851 | if(dir == SATgetDir(lit)) { |
---|
852 | oplit = plit; |
---|
853 | dir = -dir; |
---|
854 | continue; |
---|
855 | } |
---|
856 | |
---|
857 | tv = SATgetNode(*wlit); |
---|
858 | |
---|
859 | tmpv = tv; |
---|
860 | isInverted = SATisInverted(tv); |
---|
861 | tv = SATnormalNode(tv); |
---|
862 | value = SATvalue(tv) ^ isInverted; |
---|
863 | if(value == 0) { /** conflict happens **/ |
---|
864 | d->conflict = nv; |
---|
865 | wl->num = size; |
---|
866 | return; |
---|
867 | } |
---|
868 | else if(value > 1) { /** implication **/ |
---|
869 | |
---|
870 | if(sat_ASImp(cm,d,tmpv,!isInverted)) |
---|
871 | break; |
---|
872 | |
---|
873 | SATvalue(tv) = !isInverted; |
---|
874 | SATmakeImplied(tv, d); |
---|
875 | SATante(tv) = nv; |
---|
876 | |
---|
877 | if((SATflags(tv) & InQueueMask) == 0) { |
---|
878 | sat_Enqueue(Q, tv); |
---|
879 | SATflags(tv) |= InQueueMask; |
---|
880 | } |
---|
881 | |
---|
882 | stats->nCNFImplications++; |
---|
883 | |
---|
884 | /** to identify the objective dependent clause for incremental |
---|
885 | * SAT |
---|
886 | **/ |
---|
887 | if(option->incTraceObjective == 1) { |
---|
888 | tsize = SATnumLits(nv); |
---|
889 | for(j=0, tplit=(long*)SATfirstLit(nv); j<tsize; j++, tplit++) { |
---|
890 | cur = SATgetNode(*tplit); |
---|
891 | cur = SATnormalNode(cur); |
---|
892 | if(SATflags(cur) & ObjMask) { |
---|
893 | SATflags(tv) |= ObjMask; |
---|
894 | break; |
---|
895 | } |
---|
896 | } |
---|
897 | } |
---|
898 | } |
---|
899 | |
---|
900 | break; |
---|
901 | } |
---|
902 | |
---|
903 | clit = *oplit; |
---|
904 | |
---|
905 | tv = SATgetNode(clit); |
---|
906 | inverted = SATisInverted(tv); |
---|
907 | tv = SATnormalNode(tv); |
---|
908 | value = SATvalue(tv) ^ inverted; |
---|
909 | |
---|
910 | if(SATisWL(clit)) { /* found other watched literal */ |
---|
911 | wlit = oplit; |
---|
912 | if(value == 1) { |
---|
913 | break; |
---|
914 | } |
---|
915 | continue; |
---|
916 | } |
---|
917 | |
---|
918 | if(value == 0) |
---|
919 | continue; |
---|
920 | |
---|
921 | SATunsetWL(plit); |
---|
922 | |
---|
923 | size--; |
---|
924 | space[i] = space[size]; |
---|
925 | i--; |
---|
926 | |
---|
927 | /** move watched literal */ |
---|
928 | var = SATgetVariable(tv); |
---|
929 | SATsetWL(oplit, dir); |
---|
930 | |
---|
931 | inverted = !inverted; |
---|
932 | if(var->wl[inverted]) { |
---|
933 | sat_ArrayInsert(var->wl[inverted], (long)oplit); |
---|
934 | } |
---|
935 | else { |
---|
936 | var->wl[inverted] = sat_ArrayAlloc(4); |
---|
937 | sat_ArrayInsert(var->wl[inverted], (long)oplit); |
---|
938 | } |
---|
939 | |
---|
940 | break; |
---|
941 | } |
---|
942 | } |
---|
943 | wl->num = size; |
---|
944 | } |
---|
945 | |
---|
946 | |
---|
947 | /**Function******************************************************************** |
---|
948 | |
---|
949 | Synopsis [implication for aig node and cnf ] |
---|
950 | |
---|
951 | Description [] |
---|
952 | |
---|
953 | SideEffects [] |
---|
954 | |
---|
955 | SeeAlso [] |
---|
956 | |
---|
957 | ******************************************************************************/ |
---|
958 | |
---|
959 | int |
---|
960 | AS_ImplyNode( |
---|
961 | satManager_t *cm, |
---|
962 | satLevel_t *d, |
---|
963 | long v) |
---|
964 | { |
---|
965 | long *fan, cur; |
---|
966 | int value; |
---|
967 | int i, size; |
---|
968 | long left, right; |
---|
969 | satVariable_t *var; |
---|
970 | satArray_t *wlArray; |
---|
971 | |
---|
972 | value = SATvalue(v) ^ 1; |
---|
973 | var = SATgetVariable(v); |
---|
974 | wlArray = var->wl[value]; |
---|
975 | |
---|
976 | /** implcation on CNF **/ |
---|
977 | if(wlArray && wlArray->size) { |
---|
978 | AS_ImplyCNF(cm, d, v, wlArray); |
---|
979 | } |
---|
980 | |
---|
981 | if(d->conflict) |
---|
982 | return(0); |
---|
983 | |
---|
984 | /** implication on AIG **/ |
---|
985 | fan = (long *)SATfanout(v); |
---|
986 | size = SATnFanout(v); |
---|
987 | for(i=0; i<size; i++, fan++) { |
---|
988 | cur = *fan; |
---|
989 | cur = cur >> 1; |
---|
990 | cur = SATnormalNode(cur); |
---|
991 | left = SATleftChild(cur); |
---|
992 | right = SATrightChild(cur); |
---|
993 | value = SATgetValue(left, right, cur); |
---|
994 | #if DBG |
---|
995 | |
---|
996 | assert(SATflags(SATnormalNode(left))&CoiMask); |
---|
997 | assert(SATflags(SATnormalNode(right))&CoiMask); |
---|
998 | #endif |
---|
999 | (ASImplicationFN[value])(cm, d, cur, left, right); |
---|
1000 | |
---|
1001 | if(d->conflict) |
---|
1002 | return(0); |
---|
1003 | } |
---|
1004 | |
---|
1005 | left = SATleftChild(v); |
---|
1006 | right = SATrightChild(v); |
---|
1007 | value = SATgetValue(left, right, v); |
---|
1008 | #if DBG |
---|
1009 | |
---|
1010 | assert(left==bAig_NULL||SATflags(SATnormalNode(left))&CoiMask); |
---|
1011 | assert(right==bAig_NULL||SATflags(SATnormalNode(right))&CoiMask); |
---|
1012 | #endif |
---|
1013 | |
---|
1014 | |
---|
1015 | (ASImplicationFN[value])(cm, d, v, left, right); |
---|
1016 | |
---|
1017 | if(d->conflict) |
---|
1018 | return(0); |
---|
1019 | |
---|
1020 | |
---|
1021 | return(1); |
---|
1022 | } |
---|
1023 | |
---|
1024 | |
---|
1025 | /**Function******************************************************************** |
---|
1026 | |
---|
1027 | Synopsis [The main procedure of implication propogation] |
---|
1028 | |
---|
1029 | Description [] |
---|
1030 | |
---|
1031 | SideEffects [] |
---|
1032 | |
---|
1033 | SeeAlso [] |
---|
1034 | |
---|
1035 | ******************************************************************************/ |
---|
1036 | |
---|
1037 | void |
---|
1038 | AS_ImplicationMain( |
---|
1039 | satManager_t *cm, |
---|
1040 | satLevel_t *d) |
---|
1041 | { |
---|
1042 | satQueue_t *Q, *BDDQ; |
---|
1043 | long v; |
---|
1044 | |
---|
1045 | Q = cm->queue; |
---|
1046 | BDDQ = cm->BDDQueue; |
---|
1047 | |
---|
1048 | while(1) { |
---|
1049 | v = sat_Dequeue(Q); |
---|
1050 | while(v && d->conflict == 0) { |
---|
1051 | AS_ImplyNode(cm, d, v); |
---|
1052 | SATflags(v) &= ResetInQueueMask; |
---|
1053 | |
---|
1054 | v = sat_Dequeue(Q); |
---|
1055 | } |
---|
1056 | |
---|
1057 | if(d->conflict) |
---|
1058 | break; |
---|
1059 | |
---|
1060 | if(cm->option->BDDImplication) { |
---|
1061 | v = sat_Dequeue(Q); |
---|
1062 | while(v && d->conflict == 0) { |
---|
1063 | sat_ImplyBDD(cm, d, v); |
---|
1064 | SATflags(v) &= ResetInQueueMask; |
---|
1065 | |
---|
1066 | v = sat_Dequeue(Q); |
---|
1067 | } |
---|
1068 | } |
---|
1069 | |
---|
1070 | if(Q->size == 0 && BDDQ->size == 0) |
---|
1071 | break; |
---|
1072 | } |
---|
1073 | |
---|
1074 | sat_CleanImplicationQueue(cm); |
---|
1075 | cm->implicatedSoFar += d->implied->num; |
---|
1076 | } |
---|
1077 | |
---|
1078 | |
---|
1079 | /**Function******************************************************************** |
---|
1080 | |
---|
1081 | Synopsis [Implication for assertation in one array] |
---|
1082 | |
---|
1083 | Description [] |
---|
1084 | |
---|
1085 | SideEffects [] |
---|
1086 | |
---|
1087 | SeeAlso [] |
---|
1088 | |
---|
1089 | ******************************************************************************/ |
---|
1090 | |
---|
1091 | void |
---|
1092 | AS_ImplyArray( |
---|
1093 | satManager_t *cm, |
---|
1094 | satLevel_t *d, |
---|
1095 | satArray_t *arr) |
---|
1096 | { |
---|
1097 | int i, size; |
---|
1098 | long v; |
---|
1099 | int inverted, value; |
---|
1100 | satQueue_t *Q; |
---|
1101 | satVariable_t *var; |
---|
1102 | |
---|
1103 | int dfs; |
---|
1104 | |
---|
1105 | if(arr == 0) return; |
---|
1106 | if(cm->status)return; |
---|
1107 | |
---|
1108 | size = arr->num; |
---|
1109 | Q = cm->queue; |
---|
1110 | for(i=0; i<size; i++) { |
---|
1111 | v = arr->space[i]; |
---|
1112 | inverted = SATisInverted(v); |
---|
1113 | v = SATnormalNode(v); |
---|
1114 | |
---|
1115 | value = !inverted; |
---|
1116 | if(SATvalue(v) < 2) { |
---|
1117 | if(SATvalue(v) == value) continue; |
---|
1118 | else { |
---|
1119 | cm->status = SAT_UNSAT; |
---|
1120 | d->conflict = v; |
---|
1121 | |
---|
1122 | return; |
---|
1123 | } |
---|
1124 | } |
---|
1125 | |
---|
1126 | |
---|
1127 | var = SATgetVariable(v); |
---|
1128 | dfs = var->scores[0]/SCOREUNIT; |
---|
1129 | if(dfs==cm->LatchLevel){ |
---|
1130 | if(!(SATflags(SATnormalNode(v))&AssignedMask)){ |
---|
1131 | SATflags(SATnormalNode(v))|=AssignedMask; |
---|
1132 | cm->assignedArray[dfs]++; |
---|
1133 | |
---|
1134 | #if DBG |
---|
1135 | assert(cm->assignedArray[dfs]<=cm->numArray[dfs]); |
---|
1136 | #endif |
---|
1137 | if(cm->assignedArray[dfs]==cm->numArray[dfs]) |
---|
1138 | sat_ASmergeLevel(cm); |
---|
1139 | } |
---|
1140 | } |
---|
1141 | |
---|
1142 | |
---|
1143 | SATvalue(v) = value; |
---|
1144 | SATmakeImplied(v, d); |
---|
1145 | |
---|
1146 | if(cm->option->coreGeneration){ |
---|
1147 | st_insert(cm->anteTable,(char *)SATnormalNode(v),(char *)SATnormalNode(v)); |
---|
1148 | } |
---|
1149 | |
---|
1150 | if((SATflags(v) & InQueueMask) == 0) { |
---|
1151 | sat_Enqueue(Q, v); |
---|
1152 | SATflags(v) |= InQueueMask; |
---|
1153 | } |
---|
1154 | } |
---|
1155 | } |
---|
1156 | |
---|
1157 | /**Function******************************************************************** |
---|
1158 | |
---|
1159 | Synopsis [Preprocessing step for AROSAT] |
---|
1160 | |
---|
1161 | Description [] |
---|
1162 | |
---|
1163 | SideEffects [] |
---|
1164 | |
---|
1165 | SeeAlso [] |
---|
1166 | |
---|
1167 | ******************************************************************************/ |
---|
1168 | |
---|
1169 | void |
---|
1170 | AS_PreProcessing(satManager_t *cm) |
---|
1171 | { |
---|
1172 | satLevel_t *d; |
---|
1173 | |
---|
1174 | |
---|
1175 | /** create implication queue **/ |
---|
1176 | cm->queue = sat_CreateQueue(1024); |
---|
1177 | cm->BDDQueue = sat_CreateQueue(1024); |
---|
1178 | cm->unusedAigQueue = sat_CreateQueue(1024); |
---|
1179 | |
---|
1180 | /** |
---|
1181 | create variable array : one can reduce size of variable array using |
---|
1182 | mapping. for fanout free internal node.... |
---|
1183 | **/ |
---|
1184 | |
---|
1185 | if(cm->variableArray == 0) { |
---|
1186 | cm->variableArray = ALLOC(satVariable_t, cm->initNumVariables+1); |
---|
1187 | memset(cm->variableArray, 0, |
---|
1188 | sizeof(satVariable_t) * (cm->initNumVariables+1)); |
---|
1189 | } |
---|
1190 | |
---|
1191 | cm->auxArray = sat_ArrayAlloc(1024); |
---|
1192 | cm->nonobjUnitLitArray = sat_ArrayAlloc(128); |
---|
1193 | cm->objUnitLitArray = sat_ArrayAlloc(128); |
---|
1194 | |
---|
1195 | |
---|
1196 | |
---|
1197 | if(cm->option->AbRf == 0) |
---|
1198 | sat_CompactFanout(cm); |
---|
1199 | |
---|
1200 | |
---|
1201 | /*assign initial layer score to variables*/ |
---|
1202 | sat_InitLayerScore(cm); |
---|
1203 | |
---|
1204 | /** create decision stack **/ |
---|
1205 | if(cm->decisionHeadSize == 0) { |
---|
1206 | cm->decisionHeadSize = 32; |
---|
1207 | cm->decisionHead = ALLOC(satLevel_t, cm->decisionHeadSize); |
---|
1208 | memset(cm->decisionHead, 0, sizeof(satLevel_t) * cm->decisionHeadSize); |
---|
1209 | } |
---|
1210 | cm->currentDecision = -1; |
---|
1211 | |
---|
1212 | /** to avoid purify warning **/ |
---|
1213 | SATvalue(2) = 2; |
---|
1214 | SATflags(0) = 0; |
---|
1215 | |
---|
1216 | cm->initNodesArraySize = cm->nodesArraySize; |
---|
1217 | cm->beginConflict = cm->nodesArraySize; |
---|
1218 | |
---|
1219 | /** incremental SAT.... **/ |
---|
1220 | if(cm->option->incTraceObjective) { |
---|
1221 | sat_RestoreForwardedClauses(cm, 0); |
---|
1222 | } |
---|
1223 | else if(cm->option->incAll) { |
---|
1224 | sat_RestoreForwardedClauses(cm, 1); |
---|
1225 | } |
---|
1226 | |
---|
1227 | if(cm->option->incTraceObjective) { |
---|
1228 | sat_MarkObjectiveFlagToArray(cm, cm->obj); |
---|
1229 | sat_MarkObjectiveFlagToArray(cm, cm->objCNF); |
---|
1230 | } |
---|
1231 | |
---|
1232 | |
---|
1233 | /** Level 0 decision.... **/ |
---|
1234 | d = sat_AllocLevel(cm); |
---|
1235 | |
---|
1236 | sat_ApplyForcedAssignmentMain(cm, d); |
---|
1237 | |
---|
1238 | if(cm->status == SAT_UNSAT) |
---|
1239 | return; |
---|
1240 | |
---|
1241 | |
---|
1242 | if(cm->option->coreGeneration){ |
---|
1243 | cm->rm = ALLOC(RTManager_t, 1); |
---|
1244 | memset(cm->rm,0,sizeof(RTManager_t)); |
---|
1245 | } |
---|
1246 | |
---|
1247 | |
---|
1248 | AS_ImplyArray(cm, d, cm->auxObj); |
---|
1249 | AS_ImplyArray(cm, d, cm->obj); |
---|
1250 | AS_ImplyArray(cm,d,cm->assertArray); |
---|
1251 | |
---|
1252 | |
---|
1253 | AS_ImplicationMain(cm, d); |
---|
1254 | if(d->conflict) { |
---|
1255 | cm->status = SAT_UNSAT; |
---|
1256 | } |
---|
1257 | |
---|
1258 | if(cm->status == 0) { |
---|
1259 | if(cm->option->incDistill) { |
---|
1260 | sat_IncrementalUsingDistill(cm); |
---|
1261 | } |
---|
1262 | } |
---|
1263 | |
---|
1264 | } |
---|
1265 | |
---|
1266 | |
---|
1267 | /**Function******************************************************************** |
---|
1268 | |
---|
1269 | Synopsis [backtrack procedure for arosat] |
---|
1270 | |
---|
1271 | Description [] |
---|
1272 | |
---|
1273 | SideEffects [] |
---|
1274 | |
---|
1275 | SeeAlso [] |
---|
1276 | |
---|
1277 | ******************************************************************************/ |
---|
1278 | |
---|
1279 | |
---|
1280 | void |
---|
1281 | AS_Backtrack( |
---|
1282 | satManager_t *cm, |
---|
1283 | int level) |
---|
1284 | { |
---|
1285 | satLevel_t *d; |
---|
1286 | |
---|
1287 | |
---|
1288 | d = SATgetDecision(cm->currentDecision); |
---|
1289 | while(1) { |
---|
1290 | if(d->level <= level) |
---|
1291 | break; |
---|
1292 | |
---|
1293 | AS_Undo(cm, d); |
---|
1294 | cm->currentDecision--; |
---|
1295 | if(cm->currentDecision == -1) |
---|
1296 | break; |
---|
1297 | d = SATgetDecision(cm->currentDecision); |
---|
1298 | } |
---|
1299 | return; |
---|
1300 | } |
---|
1301 | |
---|
1302 | |
---|
1303 | /**Function******************************************************************** |
---|
1304 | |
---|
1305 | Synopsis [procedure for updating score] |
---|
1306 | |
---|
1307 | Description [] |
---|
1308 | |
---|
1309 | SideEffects [] |
---|
1310 | |
---|
1311 | SeeAlso [] |
---|
1312 | |
---|
1313 | ******************************************************************************/ |
---|
1314 | |
---|
1315 | |
---|
1316 | void |
---|
1317 | AS_UpdateScore( |
---|
1318 | satManager_t *cm) |
---|
1319 | { |
---|
1320 | satArray_t *one, *tmp; |
---|
1321 | satArray_t *ordered; |
---|
1322 | satVariable_t *var; |
---|
1323 | int size, i; |
---|
1324 | long v; |
---|
1325 | int value; |
---|
1326 | |
---|
1327 | int baseScore,realScore,newNum; |
---|
1328 | |
---|
1329 | ordered = cm->orderedVariableArray; |
---|
1330 | |
---|
1331 | one = sat_ArrayAlloc(ordered->num); |
---|
1332 | tmp = sat_ArrayAlloc(ordered->num); |
---|
1333 | |
---|
1334 | size = ordered->num; |
---|
1335 | for(i=0; i<size; i++) { |
---|
1336 | v = ordered->space[i]; |
---|
1337 | |
---|
1338 | if(SATvalue(v) < 2 && SATlevel(v) == 0) |
---|
1339 | continue; |
---|
1340 | |
---|
1341 | var = SATgetVariable(v); |
---|
1342 | |
---|
1343 | baseScore =(var->scores[0]/SCOREUNIT)*SCOREUNIT; |
---|
1344 | realScore = var->scores[0]%SCOREUNIT; |
---|
1345 | newNum = var->litsCount[0] - var->lastLitsCount[0]; |
---|
1346 | var->scores[0] = baseScore + (realScore>>1) + newNum; |
---|
1347 | baseScore =(var->scores[1]/SCOREUNIT)*SCOREUNIT; |
---|
1348 | realScore = var->scores[1]%SCOREUNIT; |
---|
1349 | newNum = var->litsCount[1] - var->lastLitsCount[1]; |
---|
1350 | var->scores[1] = baseScore + (realScore>>1) + newNum; |
---|
1351 | |
---|
1352 | var->lastLitsCount[0] = var->litsCount[0]; |
---|
1353 | var->lastLitsCount[1] = var->litsCount[1]; |
---|
1354 | |
---|
1355 | |
---|
1356 | if((var->scores[0] + var->scores[1]) < 1) { |
---|
1357 | sat_ArrayInsert(one, v); |
---|
1358 | } |
---|
1359 | else { |
---|
1360 | value = (var->scores[0] > var->scores[1]) ? var->scores[0] : var->scores[1]; |
---|
1361 | sat_ArrayInsert(tmp, v); |
---|
1362 | sat_ArrayInsert(tmp, value); |
---|
1363 | } |
---|
1364 | } |
---|
1365 | |
---|
1366 | qsort(tmp->space, (tmp->num)>>1, sizeof(long)*2, ScoreCompare); |
---|
1367 | |
---|
1368 | ordered->num = 0; |
---|
1369 | size = tmp->num; |
---|
1370 | for(i=0; i<size; i++) { |
---|
1371 | v = tmp->space[i]; |
---|
1372 | sat_ArrayInsert(ordered, v); |
---|
1373 | var = SATgetVariable(v); |
---|
1374 | var->pos = (i>>1); |
---|
1375 | i++; |
---|
1376 | } |
---|
1377 | |
---|
1378 | size = one->num; |
---|
1379 | for(i=0; i<size; i++) { |
---|
1380 | v = one->space[i]; |
---|
1381 | var = SATgetVariable(v); |
---|
1382 | var->pos = ordered->num; |
---|
1383 | sat_ArrayInsert(ordered, v); |
---|
1384 | } |
---|
1385 | |
---|
1386 | sat_ArrayFree(one); |
---|
1387 | sat_ArrayFree(tmp); |
---|
1388 | |
---|
1389 | cm->orderedVariableArray = ordered; |
---|
1390 | cm->currentVarPos = 0; |
---|
1391 | |
---|
1392 | for(i=1; i<cm->currentDecision; i++) { |
---|
1393 | cm->decisionHead[i].currentVarPos = 0; |
---|
1394 | } |
---|
1395 | |
---|
1396 | if(cm->option->verbose > 3) |
---|
1397 | sat_PrintScore(cm); |
---|
1398 | |
---|
1399 | } |
---|
1400 | |
---|
1401 | |
---|
1402 | /**Function******************************************************************** |
---|
1403 | |
---|
1404 | Synopsis [Periodically executed operations] |
---|
1405 | |
---|
1406 | Description [] |
---|
1407 | |
---|
1408 | SideEffects [] |
---|
1409 | |
---|
1410 | SeeAlso [] |
---|
1411 | |
---|
1412 | ******************************************************************************/ |
---|
1413 | |
---|
1414 | void |
---|
1415 | AS_PeriodicFunctions(satManager_t *cm) |
---|
1416 | { |
---|
1417 | satStatistics_t *stats; |
---|
1418 | satOption_t *option; |
---|
1419 | int nDecisions; |
---|
1420 | int gap; |
---|
1421 | |
---|
1422 | stats = cm->each; |
---|
1423 | option = cm->option; |
---|
1424 | nDecisions = stats->nDecisions-stats->nShrinkDecisions; |
---|
1425 | if(nDecisions && !(nDecisions % option->decisionAgeInterval)) { |
---|
1426 | if(option->decisionAgeRestart) { |
---|
1427 | gap = stats->nConflictCl-stats->nOldConflictCl; |
---|
1428 | if(gap > option->decisionAgeInterval>>2) { |
---|
1429 | |
---|
1430 | AS_UpdateScore(cm); |
---|
1431 | |
---|
1432 | AS_Backtrack(cm, cm->lowestBacktrackLevel); |
---|
1433 | cm->currentTopConflict = cm->literals->last-1; |
---|
1434 | cm->currentTopConflictCount = 0; |
---|
1435 | cm->lowestBacktrackLevel = MAXINT; |
---|
1436 | } |
---|
1437 | stats->nOldConflictCl = stats->nConflictCl; |
---|
1438 | } |
---|
1439 | else { |
---|
1440 | |
---|
1441 | AS_UpdateScore(cm); |
---|
1442 | } |
---|
1443 | |
---|
1444 | } |
---|
1445 | |
---|
1446 | if(stats->nBacktracks > option->nextClauseDeletion) { |
---|
1447 | option->nextClauseDeletion += option->clauseDeletionInterval; |
---|
1448 | sat_ClauseDeletion(cm); |
---|
1449 | } |
---|
1450 | } |
---|
1451 | |
---|
1452 | /**Function******************************************************************** |
---|
1453 | |
---|
1454 | Synopsis [Decision procedure] |
---|
1455 | |
---|
1456 | Description [] |
---|
1457 | |
---|
1458 | SideEffects [] |
---|
1459 | |
---|
1460 | SeeAlso [] |
---|
1461 | |
---|
1462 | ******************************************************************************/ |
---|
1463 | |
---|
1464 | satLevel_t * |
---|
1465 | AS_MakeDecision(satManager_t *cm) |
---|
1466 | { |
---|
1467 | satLevel_t *d; |
---|
1468 | int value; |
---|
1469 | long v; |
---|
1470 | satStatistics_t *stats; |
---|
1471 | |
---|
1472 | d = SATgetDecision(cm->currentDecision); |
---|
1473 | |
---|
1474 | if(cm->queue->size) |
---|
1475 | return(d); |
---|
1476 | |
---|
1477 | d = sat_AllocLevel(cm); |
---|
1478 | |
---|
1479 | v = 0; |
---|
1480 | v = sat_DecisionBasedOnBDD(cm, d); |
---|
1481 | |
---|
1482 | if(v == 0) |
---|
1483 | v = sat_DecisionBasedOnScore(cm, d); |
---|
1484 | |
---|
1485 | if(v == 0) |
---|
1486 | return(0); |
---|
1487 | |
---|
1488 | |
---|
1489 | sat_ASDec(cm,d,v); |
---|
1490 | |
---|
1491 | stats = cm->each; |
---|
1492 | |
---|
1493 | stats->nDecisions++; |
---|
1494 | |
---|
1495 | value = !(SATisInverted(v)); |
---|
1496 | v = SATnormalNode(v); |
---|
1497 | d->decisionNode = v; |
---|
1498 | |
---|
1499 | |
---|
1500 | if((SATgetVariable(v)->RecVal)!=0){ |
---|
1501 | if(SATgetVariable(v)->RecVal==-1) |
---|
1502 | value=0; |
---|
1503 | else{ |
---|
1504 | #if DBG |
---|
1505 | assert(SATgetVariable(v)->RecVal==1); |
---|
1506 | #endif |
---|
1507 | value=1; |
---|
1508 | } |
---|
1509 | |
---|
1510 | } |
---|
1511 | |
---|
1512 | |
---|
1513 | SATvalue(v) = value; |
---|
1514 | |
---|
1515 | SATmakeImplied(v, d); |
---|
1516 | #if DBG |
---|
1517 | |
---|
1518 | assert(SATflags(v)&CoiMask); |
---|
1519 | #endif |
---|
1520 | |
---|
1521 | sat_Enqueue(cm->queue, v); |
---|
1522 | SATflags(v) |= InQueueMask; |
---|
1523 | |
---|
1524 | return(d); |
---|
1525 | } |
---|
1526 | |
---|
1527 | /**Function******************************************************************** |
---|
1528 | |
---|
1529 | Synopsis [Find UIP for generating conflict clauses] |
---|
1530 | |
---|
1531 | Description [] |
---|
1532 | |
---|
1533 | SideEffects [] |
---|
1534 | |
---|
1535 | SeeAlso [] |
---|
1536 | |
---|
1537 | ******************************************************************************/ |
---|
1538 | |
---|
1539 | void |
---|
1540 | AS_FindUIP( |
---|
1541 | satManager_t *cm, |
---|
1542 | satArray_t *clauseArray, |
---|
1543 | satLevel_t *d, |
---|
1544 | int *objectFlag, |
---|
1545 | int *bLevel, |
---|
1546 | long *fdaLit) |
---|
1547 | { |
---|
1548 | long conflicting; |
---|
1549 | int nMarked, value; |
---|
1550 | int first, i,j; |
---|
1551 | long *space, v,left,right,inverted,result,*tmp; |
---|
1552 | satArray_t *implied; |
---|
1553 | satOption_t *option; |
---|
1554 | RTnode_t tmprt; |
---|
1555 | int size = 0; |
---|
1556 | long *lp, *tmpIP,ante,ante2,node; |
---|
1557 | RTManager_t * rm = cm->rm; |
---|
1558 | |
---|
1559 | conflicting = d->conflict; |
---|
1560 | nMarked = 0; |
---|
1561 | option = cm->option; |
---|
1562 | if(option->incTraceObjective) *objectFlag = 0; |
---|
1563 | else *objectFlag = ObjMask; |
---|
1564 | |
---|
1565 | (*objectFlag) |= (SATflags(conflicting) & ObjMask); |
---|
1566 | |
---|
1567 | /* find seed from conflicting clause to find unique implication point. |
---|
1568 | * */ |
---|
1569 | clauseArray->num = 0; |
---|
1570 | sat_MarkNodeInConflict( |
---|
1571 | cm, d, &nMarked, objectFlag, bLevel, clauseArray); |
---|
1572 | |
---|
1573 | /* Traverse implication graph backward */ |
---|
1574 | first = 1; |
---|
1575 | implied = d->implied; |
---|
1576 | space = implied->space+implied->num-1; |
---|
1577 | |
---|
1578 | |
---|
1579 | if(cm->option->coreGeneration){ |
---|
1580 | /*if last conflict is CNF*/ |
---|
1581 | if(SATflags(conflicting)&IsCNFMask){ |
---|
1582 | /*is conflict CNF*/ |
---|
1583 | if(SATflags(conflicting)&IsConflictMask){ |
---|
1584 | if(!st_lookup(cm->RTreeTable,(char*)conflicting,&tmprt)){ |
---|
1585 | fprintf(vis_stderr,"RTree node of conflict cnf %ld is not in RTreeTable\n",ante); |
---|
1586 | exit(0); |
---|
1587 | } |
---|
1588 | else{ |
---|
1589 | rm->root = tmprt; |
---|
1590 | } |
---|
1591 | } |
---|
1592 | /*CNF but not conflict*/ |
---|
1593 | else{ |
---|
1594 | rm->root = RTCreateNode(rm); |
---|
1595 | RT_oriClsIdx(rm->root) = conflicting; |
---|
1596 | size = SATnumLits(conflicting); |
---|
1597 | RT_fSize(rm->root) = size; |
---|
1598 | } |
---|
1599 | } |
---|
1600 | /*if last conflict is AIG*/ |
---|
1601 | else{ |
---|
1602 | rm->root = RTCreateNode(rm); |
---|
1603 | node = SATnormalNode(conflicting); |
---|
1604 | left = SATleftChild(node); |
---|
1605 | right = SATrightChild(node); |
---|
1606 | result = PureSat_IdentifyConflict(cm,left,right,conflicting); |
---|
1607 | inverted = SATisInverted(left); |
---|
1608 | left = SATnormalNode(left); |
---|
1609 | left = inverted ? SATnot(left) : left; |
---|
1610 | |
---|
1611 | inverted = SATisInverted(right); |
---|
1612 | right = SATnormalNode(right); |
---|
1613 | right = inverted ? SATnot(right) : right; |
---|
1614 | |
---|
1615 | j = node; |
---|
1616 | |
---|
1617 | if(result == 1){ |
---|
1618 | tmp = ALLOC(long,3); |
---|
1619 | tmp[0] = left; |
---|
1620 | tmp[1] = SATnot(j); |
---|
1621 | size = 2; |
---|
1622 | } |
---|
1623 | else if(result == 2){ |
---|
1624 | tmp = ALLOC(long,3); |
---|
1625 | tmp[0] = right; |
---|
1626 | tmp[1] = SATnot(j); |
---|
1627 | size = 2; |
---|
1628 | } |
---|
1629 | else if(result == 3){ |
---|
1630 | tmp = ALLOC(long,4); |
---|
1631 | tmp[0] = SATnot(left); |
---|
1632 | tmp[1] = SATnot(right); |
---|
1633 | tmp[2] = j; |
---|
1634 | size = 3; |
---|
1635 | } |
---|
1636 | else{ |
---|
1637 | fprintf(vis_stderr,"wrong returned result value, exit\n"); |
---|
1638 | exit(0); |
---|
1639 | } |
---|
1640 | |
---|
1641 | lp = tmp; |
---|
1642 | sat_BuildRT(cm,rm->root, lp, tmpIP,size,1); |
---|
1643 | FREE(tmp); |
---|
1644 | } |
---|
1645 | } |
---|
1646 | |
---|
1647 | |
---|
1648 | for(i=implied->num-1; i>=0; i--, space--) { |
---|
1649 | v = *space; |
---|
1650 | if(SATflags(v) & VisitedMask) { |
---|
1651 | SATflags(v) &= ResetVisitedMask; |
---|
1652 | --nMarked; |
---|
1653 | |
---|
1654 | if(nMarked == 0 && (!first || i==0)) { |
---|
1655 | value = SATvalue(v); |
---|
1656 | *fdaLit = v^(!value); |
---|
1657 | sat_ArrayInsert(clauseArray, *fdaLit); |
---|
1658 | break; |
---|
1659 | } |
---|
1660 | |
---|
1661 | |
---|
1662 | |
---|
1663 | if(cm->option->coreGeneration){ |
---|
1664 | ante = SATante(v); |
---|
1665 | if(ante==0){ |
---|
1666 | if(!(st_lookup(cm->anteTable, (char *)SATnormalNode(v),&ante))){ |
---|
1667 | fprintf(vis_stderr,"ante = 0 and is not in anteTable %ld\n",v); |
---|
1668 | exit(0); |
---|
1669 | } |
---|
1670 | } |
---|
1671 | |
---|
1672 | /*build non-leaf node*/ |
---|
1673 | tmprt = RTCreateNode(rm); |
---|
1674 | RT_pivot(tmprt) = SATnormalNode(v); |
---|
1675 | RT_right(tmprt) = rm->root; |
---|
1676 | rm->root = tmprt; |
---|
1677 | |
---|
1678 | if((SATflags(ante)&IsConflictMask)&&(SATflags(ante)&IsCNFMask)){ |
---|
1679 | if(!st_lookup(cm->RTreeTable,(char*)ante,&tmprt)){ |
---|
1680 | fprintf(vis_stderr,"RTree node of conflict cnf %ld is not in RTreeTable\n",ante); |
---|
1681 | exit(0); |
---|
1682 | } |
---|
1683 | else{ |
---|
1684 | RT_left(rm->root) = tmprt; |
---|
1685 | } |
---|
1686 | } |
---|
1687 | else{ /* if not conflict CNF*/ |
---|
1688 | /*left */ |
---|
1689 | tmprt = RTCreateNode(rm); |
---|
1690 | RT_left(rm->root) = tmprt; |
---|
1691 | /*left is AIG*/ |
---|
1692 | if(!(SATflags(ante) & IsCNFMask)){ |
---|
1693 | /*generate formula for left*/ |
---|
1694 | tmp = ALLOC(long,3); |
---|
1695 | value = SATvalue(v); |
---|
1696 | node = SATnormalNode(v); |
---|
1697 | node = value==1?node:SATnot(node); |
---|
1698 | tmp[0] = node; |
---|
1699 | |
---|
1700 | size = 1; |
---|
1701 | if(ante != SATnormalNode(v)){ |
---|
1702 | value = SATvalue(ante); |
---|
1703 | node = SATnormalNode(ante); |
---|
1704 | node = value==1?SATnot(node):node; |
---|
1705 | tmp[1] = node; |
---|
1706 | size++; |
---|
1707 | ante2 = SATante2(v); |
---|
1708 | if(ante2){ |
---|
1709 | value = SATvalue(ante2); |
---|
1710 | node = SATnormalNode(ante2); |
---|
1711 | node = value==1?SATnot(node):node; |
---|
1712 | tmp[2] = node; |
---|
1713 | size++; |
---|
1714 | } |
---|
1715 | } |
---|
1716 | /*generate p1 and p2*/ |
---|
1717 | lp = tmp; |
---|
1718 | sat_BuildRT(cm,tmprt,lp,tmpIP,size,1); |
---|
1719 | FREE(tmp); |
---|
1720 | } |
---|
1721 | /* left is CNF*/ |
---|
1722 | else{ |
---|
1723 | RT_oriClsIdx(tmprt) = ante; |
---|
1724 | //generate p1 and p2 for left |
---|
1725 | lp = (long*)SATfirstLit(ante); |
---|
1726 | size = SATnumLits(ante); |
---|
1727 | RT_fSize(tmprt) = size; |
---|
1728 | } |
---|
1729 | } /*else{ if not conflict CNF*/ |
---|
1730 | |
---|
1731 | }/*if(cm->option->coreGeneration){*/ |
---|
1732 | |
---|
1733 | |
---|
1734 | sat_MarkNodeInImpliedNode( |
---|
1735 | cm, d, v, &nMarked, objectFlag, bLevel, clauseArray); |
---|
1736 | /*Bing:Important for EffIP*/ |
---|
1737 | first = 0; |
---|
1738 | } |
---|
1739 | /* first = 0;*/ |
---|
1740 | } |
---|
1741 | |
---|
1742 | |
---|
1743 | /* Minimize conflict clause */ |
---|
1744 | if(option->minimizeConflictClause) |
---|
1745 | sat_MinimizeConflictClause(cm, clauseArray); |
---|
1746 | else |
---|
1747 | sat_ResetFlagForClauseArray(cm, clauseArray); |
---|
1748 | |
---|
1749 | return; |
---|
1750 | } |
---|
1751 | |
---|
1752 | |
---|
1753 | /**Function******************************************************************** |
---|
1754 | |
---|
1755 | Synopsis [Conflict analysis procedure] |
---|
1756 | |
---|
1757 | Description [] |
---|
1758 | |
---|
1759 | SideEffects [] |
---|
1760 | |
---|
1761 | SeeAlso [] |
---|
1762 | |
---|
1763 | ******************************************************************************/ |
---|
1764 | |
---|
1765 | int |
---|
1766 | AS_ConflictAnalysis( |
---|
1767 | satManager_t *cm, |
---|
1768 | satLevel_t *d) |
---|
1769 | { |
---|
1770 | satStatistics_t *stats; |
---|
1771 | satOption_t *option; |
---|
1772 | satArray_t *clauseArray; |
---|
1773 | int objectFlag; |
---|
1774 | int bLevel; |
---|
1775 | long fdaLit, learned, conflicting; |
---|
1776 | int inverted; |
---|
1777 | RTManager_t * rm = cm->rm; |
---|
1778 | |
---|
1779 | |
---|
1780 | conflicting = d->conflict; |
---|
1781 | |
---|
1782 | if(d->level == 0) { |
---|
1783 | /** Bing : UNSAT core generation */ |
---|
1784 | if(cm->option->coreGeneration) |
---|
1785 | sat_ConflictAnalysisForCoreGen(cm, d); |
---|
1786 | cm->currentDecision--; |
---|
1787 | return (-1); |
---|
1788 | } |
---|
1789 | |
---|
1790 | stats = cm->each; |
---|
1791 | option = cm->option; |
---|
1792 | |
---|
1793 | |
---|
1794 | stats->nBacktracks++; |
---|
1795 | |
---|
1796 | clauseArray = cm->auxArray; |
---|
1797 | |
---|
1798 | bLevel = 0; |
---|
1799 | fdaLit = -1; |
---|
1800 | clauseArray->num = 0; |
---|
1801 | |
---|
1802 | /* Find Unique Implication Point */ |
---|
1803 | AS_FindUIP(cm, clauseArray, d, &objectFlag, &bLevel, &fdaLit); |
---|
1804 | stats->nNonchonologicalBacktracks += (d->level - bLevel); |
---|
1805 | |
---|
1806 | |
---|
1807 | if(clauseArray->num == 0) { |
---|
1808 | sat_PrintImplicationGraph(cm, d); |
---|
1809 | sat_PrintNode(cm, conflicting); |
---|
1810 | } |
---|
1811 | |
---|
1812 | /* If we could find UIP then it is critical error... |
---|
1813 | * at lease the decision node has to be detected as UIP. |
---|
1814 | */ |
---|
1815 | if(fdaLit == -1) { |
---|
1816 | fprintf(vis_stdout, "%s ERROR : Illegal unit literal\n", cm->comment); |
---|
1817 | fflush(vis_stdout); |
---|
1818 | sat_PrintNode(cm, conflicting); |
---|
1819 | sat_PrintImplicationGraph(cm, d); |
---|
1820 | sat_PrintDotForConflict(cm, d, conflicting, 0); |
---|
1821 | exit(0); |
---|
1822 | } |
---|
1823 | |
---|
1824 | if(bLevel && cm->lowestBacktrackLevel > bLevel) |
---|
1825 | cm->lowestBacktrackLevel = bLevel; |
---|
1826 | |
---|
1827 | |
---|
1828 | inverted = SATisInverted(fdaLit); |
---|
1829 | fdaLit = SATnormalNode(fdaLit); |
---|
1830 | |
---|
1831 | if(option->verbose > 2) { |
---|
1832 | if(option->verbose > 4) |
---|
1833 | sat_PrintNode(cm, conflicting); |
---|
1834 | fprintf(vis_stdout, "conflict at %3d on %6ld bLevel %d UnitLit ", |
---|
1835 | d->level, conflicting, bLevel); |
---|
1836 | sat_PrintNodeAlone(cm, fdaLit); |
---|
1837 | fprintf(vis_stdout, "\n"); |
---|
1838 | } |
---|
1839 | |
---|
1840 | d->conflict = 0; |
---|
1841 | |
---|
1842 | /* unit literal conflict clause */ |
---|
1843 | if(clauseArray->num == 1) { |
---|
1844 | learned = sat_AddUnitConflictClause(cm, clauseArray, objectFlag); |
---|
1845 | |
---|
1846 | stats->nUnitConflictCl++; |
---|
1847 | cm->currentTopConflict = cm->literals->last-1; |
---|
1848 | cm->currentTopConflictCount = 0; |
---|
1849 | |
---|
1850 | AS_Backtrack(cm, 0); |
---|
1851 | |
---|
1852 | d = SATgetDecision(cm->currentDecision); |
---|
1853 | cm->implicatedSoFar -= d->implied->num; |
---|
1854 | SATante(fdaLit) = 0; |
---|
1855 | |
---|
1856 | |
---|
1857 | if(!(SATflags(SATnormalNode(fdaLit))&AssignedMask)){ |
---|
1858 | satVariable_t *var = SATgetVariable(fdaLit); |
---|
1859 | int dfs = var->scores[0]/SCOREUNIT; |
---|
1860 | #if DBG |
---|
1861 | assert(dfs==cm->LatchLevel); |
---|
1862 | #endif |
---|
1863 | SATflags(SATnormalNode(fdaLit))|=AssignedMask; |
---|
1864 | cm->assignedArray[dfs]++; |
---|
1865 | if(cm->assignedArray[dfs]==cm->numArray[dfs]) |
---|
1866 | sat_ASmergeLevel(cm); |
---|
1867 | } |
---|
1868 | |
---|
1869 | |
---|
1870 | SATvalue(fdaLit) = inverted; |
---|
1871 | SATmakeImplied(fdaLit, d); |
---|
1872 | |
---|
1873 | if((SATflags(fdaLit) & InQueueMask) == 0) { |
---|
1874 | sat_Enqueue(cm->queue, fdaLit); |
---|
1875 | SATflags(fdaLit) |= InQueueMask; |
---|
1876 | } |
---|
1877 | |
---|
1878 | clauseArray->num = 0; |
---|
1879 | |
---|
1880 | if(option->incTraceObjective && objectFlag == 0) |
---|
1881 | sat_ArrayInsert(cm->nonobjUnitLitArray, SATnot(fdaLit)); |
---|
1882 | |
---|
1883 | if(option->incDistill && objectFlag) |
---|
1884 | sat_ArrayInsert(cm->objUnitLitArray, SATnot(fdaLit)); |
---|
1885 | |
---|
1886 | if(objectFlag) |
---|
1887 | SATflags(fdaLit) |= ObjMask; |
---|
1888 | |
---|
1889 | /* Bing: UNSAT core generation */ |
---|
1890 | if(cm->option->coreGeneration){ |
---|
1891 | |
---|
1892 | st_insert(cm->anteTable,(char*)SATnormalNode(fdaLit),(char*)learned); |
---|
1893 | st_insert(cm->RTreeTable, (char *)learned, (char *)rm->root); |
---|
1894 | RT_oriClsIdx(rm->root) = learned; |
---|
1895 | } |
---|
1896 | |
---|
1897 | return(bLevel); |
---|
1898 | } |
---|
1899 | |
---|
1900 | /* add conflict learned clause */ |
---|
1901 | learned = sat_AddConflictClause(cm, clauseArray, objectFlag); |
---|
1902 | |
---|
1903 | cm->currentTopConflict = cm->literals->last-1; |
---|
1904 | cm->currentTopConflictCount = 0; |
---|
1905 | |
---|
1906 | /* Bing: UNSAT core generation */ |
---|
1907 | if(cm->option->coreGeneration){ |
---|
1908 | st_insert(cm->RTreeTable, (char *)learned, (char *)rm->root); |
---|
1909 | RT_oriClsIdx(rm->root) = learned; |
---|
1910 | } |
---|
1911 | |
---|
1912 | if(option->verbose > 2) { |
---|
1913 | sat_PrintNode(cm, learned); |
---|
1914 | fflush(vis_stdout); |
---|
1915 | } |
---|
1916 | |
---|
1917 | |
---|
1918 | /* apply Deepest Variable Hike decision heuristic */ |
---|
1919 | if(option->decisionHeuristic & DVH_DECISION) |
---|
1920 | sat_UpdateDVH(cm, d, clauseArray, bLevel, fdaLit); |
---|
1921 | |
---|
1922 | |
---|
1923 | /* Backtrack and failure driven assertion */ |
---|
1924 | AS_Backtrack(cm, bLevel); |
---|
1925 | |
---|
1926 | d = SATgetDecision(bLevel); |
---|
1927 | cm->implicatedSoFar -= d->implied->num; |
---|
1928 | |
---|
1929 | |
---|
1930 | if(!(SATflags(SATnormalNode(fdaLit))&AssignedMask)){ |
---|
1931 | satVariable_t *var = SATgetVariable(fdaLit); |
---|
1932 | int dfs = var->scores[0]/SCOREUNIT; |
---|
1933 | #if DBG |
---|
1934 | assert(dfs==cm->LatchLevel); |
---|
1935 | #endif |
---|
1936 | SATflags(SATnormalNode(fdaLit))|=AssignedMask; |
---|
1937 | cm->assignedArray[dfs]++; |
---|
1938 | if(cm->assignedArray[dfs]==cm->numArray[dfs]) |
---|
1939 | sat_ASmergeLevel(cm); |
---|
1940 | } |
---|
1941 | |
---|
1942 | |
---|
1943 | SATante(fdaLit) = learned; |
---|
1944 | SATvalue(fdaLit) = inverted; |
---|
1945 | SATmakeImplied(fdaLit, d); |
---|
1946 | |
---|
1947 | if((SATflags(fdaLit) & InQueueMask) == 0) { |
---|
1948 | sat_Enqueue(cm->queue, fdaLit); |
---|
1949 | SATflags(fdaLit) |= InQueueMask; |
---|
1950 | } |
---|
1951 | |
---|
1952 | clauseArray->num = 0; |
---|
1953 | if(objectFlag) |
---|
1954 | SATflags(fdaLit) |= ObjMask; |
---|
1955 | |
---|
1956 | return(bLevel); |
---|
1957 | } |
---|
1958 | |
---|
1959 | |
---|
1960 | /**Function******************************************************************** |
---|
1961 | |
---|
1962 | Synopsis [Main solving procedure] |
---|
1963 | |
---|
1964 | Description [] |
---|
1965 | |
---|
1966 | SideEffects [] |
---|
1967 | |
---|
1968 | SeeAlso [] |
---|
1969 | |
---|
1970 | ******************************************************************************/ |
---|
1971 | |
---|
1972 | void |
---|
1973 | AS_Solve(satManager_t *cm) |
---|
1974 | { |
---|
1975 | satLevel_t *d; |
---|
1976 | satOption_t *option; |
---|
1977 | satVariable_t *var; |
---|
1978 | int level; |
---|
1979 | |
---|
1980 | d = SATgetDecision(0); |
---|
1981 | cm->implicatedSoFar = d->implied->num; |
---|
1982 | cm->currentTopConflict = 0; |
---|
1983 | |
---|
1984 | option = cm->option; |
---|
1985 | if(option->BDDMonolithic) { |
---|
1986 | sat_TryToBuildMonolithicBDD(cm); |
---|
1987 | } |
---|
1988 | |
---|
1989 | if(cm->status == SAT_UNSAT) { |
---|
1990 | AS_Undo(cm, SATgetDecision(0)); |
---|
1991 | return; |
---|
1992 | } |
---|
1993 | |
---|
1994 | while(1) { |
---|
1995 | AS_PeriodicFunctions(cm); |
---|
1996 | |
---|
1997 | if(cm->currentDecision == 0) |
---|
1998 | sat_BuildLevelZeroHyperImplicationGraph(cm); |
---|
1999 | |
---|
2000 | d = AS_MakeDecision(cm); |
---|
2001 | |
---|
2002 | if(d == 0) { |
---|
2003 | cm->status = SAT_SAT; |
---|
2004 | return; |
---|
2005 | } |
---|
2006 | |
---|
2007 | while(1) { |
---|
2008 | AS_ImplicationMain(cm, d); |
---|
2009 | |
---|
2010 | if(d->conflict == 0) { |
---|
2011 | if(cm->option->verbose > 2) { |
---|
2012 | var = SATgetVariable(d->decisionNode); |
---|
2013 | fprintf(vis_stdout, "decision at %3d on %6ld <- %ld score(%d %d) %d %ld implied %.3f %%\n", |
---|
2014 | d->level, d->decisionNode, SATvalue(d->decisionNode), |
---|
2015 | var->scores[0], var->scores[1], |
---|
2016 | cm->each->nDecisions, d->implied->num, |
---|
2017 | (double)cm->implicatedSoFar/(double)cm->initNumVariables * 100); |
---|
2018 | fflush(vis_stdout); |
---|
2019 | } |
---|
2020 | |
---|
2021 | break; |
---|
2022 | } |
---|
2023 | if(cm->option->verbose > 2) { |
---|
2024 | var = SATgetVariable(d->decisionNode); |
---|
2025 | fprintf(vis_stdout, "decision at %3d on %6ld <- %ld score(%d %d) %d %ld implied %.3f %% Conflict\n", |
---|
2026 | d->level, d->decisionNode, SATvalue(d->decisionNode), |
---|
2027 | var->scores[0], var->scores[1], |
---|
2028 | cm->each->nDecisions, d->implied->num, |
---|
2029 | (double)cm->implicatedSoFar/(double)cm->initNumVariables * 100); |
---|
2030 | fflush(vis_stdout); |
---|
2031 | } |
---|
2032 | |
---|
2033 | level = AS_ConflictAnalysis(cm, d); |
---|
2034 | |
---|
2035 | if(cm->currentDecision == -1) { |
---|
2036 | if(cm->option->incDistill) { |
---|
2037 | sat_BuildTrieForDistill(cm); |
---|
2038 | } |
---|
2039 | AS_Undo(cm, SATgetDecision(0)); |
---|
2040 | cm->status = SAT_UNSAT; |
---|
2041 | return; |
---|
2042 | } |
---|
2043 | |
---|
2044 | d = SATgetDecision(cm->currentDecision); |
---|
2045 | } |
---|
2046 | |
---|
2047 | } |
---|
2048 | } |
---|
2049 | |
---|
2050 | |
---|
2051 | /**Function******************************************************************** |
---|
2052 | |
---|
2053 | Synopsis [The main procedure of AROSAT solver] |
---|
2054 | |
---|
2055 | Description [] |
---|
2056 | |
---|
2057 | SideEffects [] |
---|
2058 | |
---|
2059 | SeeAlso [] |
---|
2060 | |
---|
2061 | ******************************************************************************/ |
---|
2062 | |
---|
2063 | void AS_Main(satManager_t *cm) |
---|
2064 | { |
---|
2065 | long btime, etime; |
---|
2066 | |
---|
2067 | btime = util_cpu_time(); |
---|
2068 | AS_PreProcessing(cm); |
---|
2069 | |
---|
2070 | if(cm->status == 0) |
---|
2071 | AS_Solve(cm); |
---|
2072 | |
---|
2073 | /** Bing: UNSAT core generation **/ |
---|
2074 | if(cm->option->coreGeneration && cm->status == SAT_UNSAT){ |
---|
2075 | |
---|
2076 | sat_GenerateCore_All(cm); |
---|
2077 | } |
---|
2078 | |
---|
2079 | sat_PostProcessing(cm); |
---|
2080 | |
---|
2081 | etime = util_cpu_time(); |
---|
2082 | cm->each->satTime = (double)(etime - btime) / 1000.0 ; |
---|
2083 | |
---|
2084 | } |
---|
2085 | |
---|
2086 | |
---|
2087 | /**Function******************************************************************** |
---|
2088 | |
---|
2089 | Synopsis [Create one layer for AROSAT] |
---|
2090 | |
---|
2091 | Description [] |
---|
2092 | |
---|
2093 | SideEffects [] |
---|
2094 | |
---|
2095 | SeeAlso [] |
---|
2096 | |
---|
2097 | ******************************************************************************/ |
---|
2098 | |
---|
2099 | |
---|
2100 | void PureSatCreateOneLayer(Ntk_Network_t *network, |
---|
2101 | PureSat_Manager_t *pm, |
---|
2102 | satManager_t *cm, |
---|
2103 | array_t * latchArray, |
---|
2104 | int layer) |
---|
2105 | { |
---|
2106 | mAig_Manager_t * manager = Ntk_NetworkReadMAigManager(network); |
---|
2107 | st_table * node2MvfAigTable =(st_table *) Ntk_NetworkReadApplInfo(network, |
---|
2108 | MVFAIG_NETWORK_APPL_KEY); |
---|
2109 | MvfAig_Function_t *mvfAig; |
---|
2110 | bAigTimeFrame_t * tf = manager->timeframeWOI; |
---|
2111 | mAigMvar_t lmVar; |
---|
2112 | mAigBvar_t bVar; |
---|
2113 | array_t *bVarList,*mVarList; |
---|
2114 | int i,j,k,lmAigId,index,index1; |
---|
2115 | char * name; |
---|
2116 | Ntk_Node_t * latch; |
---|
2117 | bAigEdge_t node,v, *li, *bli; |
---|
2118 | st_table *table = st_init_table(st_numcmp,st_numhash); |
---|
2119 | |
---|
2120 | bVarList = mAigReadBinVarList(manager); |
---|
2121 | mVarList = mAigReadMulVarList(manager); |
---|
2122 | |
---|
2123 | arrayForEachItem(char*,latchArray,i,name){ |
---|
2124 | |
---|
2125 | latch = Ntk_NetworkFindNodeByName(network,name); |
---|
2126 | st_lookup(node2MvfAigTable,latch,&mvfAig); |
---|
2127 | for(j=0;j<mvfAig->num;j++){ |
---|
2128 | int retVal; |
---|
2129 | v = bAig_GetCanonical(manager,MvfAig_FunctionReadComponent(mvfAig,j)); |
---|
2130 | if(v==bAig_Zero||v==bAig_One) |
---|
2131 | continue; |
---|
2132 | retVal = st_lookup(tf->li2index,(char *)v,&index); |
---|
2133 | assert(retVal); |
---|
2134 | for(k=1;k<=pm->Length;k++){ |
---|
2135 | li = tf->latchInputs[k]; |
---|
2136 | if(li[index]==bAig_Zero||li[index]==bAig_One) |
---|
2137 | continue; |
---|
2138 | node = bAig_NonInvertedEdge(li[index]); |
---|
2139 | st_insert(table,(char*)node,(char*)(long)layer); |
---|
2140 | |
---|
2141 | } |
---|
2142 | } |
---|
2143 | |
---|
2144 | lmAigId = Ntk_NodeReadMAigId(latch); |
---|
2145 | lmVar = array_fetch(mAigMvar_t, mVarList,lmAigId); |
---|
2146 | for(j=0,index1=lmVar.bVars;j<lmVar.encodeLength;j++,index1++){ |
---|
2147 | int retVal; |
---|
2148 | bVar = array_fetch(mAigBvar_t,bVarList,index1); |
---|
2149 | if(bVar.node==bAig_Zero||bVar.node==bAig_One) |
---|
2150 | continue; |
---|
2151 | retVal = st_lookup(tf->bli2index,(char *)bVar.node,&index); |
---|
2152 | assert(retVal); |
---|
2153 | for(k=1;k<=pm->Length;k++){ |
---|
2154 | bli = tf->blatchInputs[k]; |
---|
2155 | if(bli[index]==bAig_Zero||bli[index]==bAig_One) |
---|
2156 | continue; |
---|
2157 | node = bAig_NonInvertedEdge(bli[index]); |
---|
2158 | st_insert(table,(char*)node,(char*)(long)layer); |
---|
2159 | |
---|
2160 | } |
---|
2161 | } |
---|
2162 | } |
---|
2163 | |
---|
2164 | st_insert(cm->layerTable,table,(char*)(long)layer); |
---|
2165 | |
---|
2166 | } |
---|
2167 | |
---|
2168 | |
---|
2169 | |
---|
2170 | /**Function******************************************************************** |
---|
2171 | |
---|
2172 | Synopsis [Create all the layers] |
---|
2173 | |
---|
2174 | Description [] |
---|
2175 | |
---|
2176 | SideEffects [] |
---|
2177 | |
---|
2178 | SeeAlso [] |
---|
2179 | |
---|
2180 | ******************************************************************************/ |
---|
2181 | |
---|
2182 | |
---|
2183 | void PureSatCreateLayer(Ntk_Network_t *network, |
---|
2184 | PureSat_Manager_t *pm, |
---|
2185 | satManager_t *cm, |
---|
2186 | array_t *absModel, |
---|
2187 | array_t *sufArray) |
---|
2188 | { |
---|
2189 | int layer; |
---|
2190 | char* name; |
---|
2191 | int i,j,threshold; |
---|
2192 | array_t *tmpArray; |
---|
2193 | |
---|
2194 | if(sufArray->num<4) |
---|
2195 | layer = 1; |
---|
2196 | else if(sufArray->num<6) |
---|
2197 | layer = 2; |
---|
2198 | else if(sufArray->num<10) |
---|
2199 | layer = 3; |
---|
2200 | else if(sufArray->num<20) |
---|
2201 | layer = 5; |
---|
2202 | else if(sufArray->num<50) |
---|
2203 | layer = 8; |
---|
2204 | else |
---|
2205 | layer = 10; |
---|
2206 | |
---|
2207 | threshold = sufArray->num/layer; |
---|
2208 | layer = array_n(sufArray)/threshold; |
---|
2209 | layer = sufArray->num%threshold?layer+1:layer; |
---|
2210 | |
---|
2211 | cm->LatchLevel = layer; |
---|
2212 | cm->OriLevel = layer; |
---|
2213 | cm->layerTable = st_init_table(st_ptrcmp,st_ptrhash); |
---|
2214 | |
---|
2215 | layer = layer+1; |
---|
2216 | for(i=0;i<array_n(sufArray);i=i+threshold){ |
---|
2217 | if(i==0) |
---|
2218 | tmpArray = array_dup(absModel); |
---|
2219 | else |
---|
2220 | tmpArray = array_alloc(char*,0); |
---|
2221 | layer = layer-1; |
---|
2222 | for(j=0;j<threshold;j++){ |
---|
2223 | if(i+j>=array_n(sufArray)) |
---|
2224 | break; |
---|
2225 | name = array_fetch(char*,sufArray,i+j); |
---|
2226 | array_insert_last(char*,tmpArray,name); |
---|
2227 | |
---|
2228 | } |
---|
2229 | PureSatCreateOneLayer(network,pm,cm,tmpArray,layer); |
---|
2230 | array_free(tmpArray); |
---|
2231 | } |
---|
2232 | assert(layer==1); |
---|
2233 | cm->assignedArray = ALLOC(int,cm->LatchLevel+1); |
---|
2234 | cm->numArray = ALLOC(int,cm->LatchLevel+1); |
---|
2235 | |
---|
2236 | } |
---|