1 | /**CFile*********************************************************************** |
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2 | |
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3 | FileName [imgTfmBwd.c] |
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4 | |
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5 | PackageName [img] |
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6 | |
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7 | Synopsis [Routines for preimage computation using transition function |
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8 | method.] |
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9 | |
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10 | Description [] |
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11 | |
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12 | SeeAlso [] |
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13 | |
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14 | Author [In-Ho Moon] |
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15 | |
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16 | Copyright [Copyright (c) 1994-1996 The Regents of the Univ. of Colorado. |
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17 | All rights reserved. |
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18 | |
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19 | Permission is hereby granted, without written agreement and without license |
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20 | or royalty fees, to use, copy, modify, and distribute this software and its |
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21 | documentation for any purpose, provided that the above copyright notice and |
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22 | the following two paragraphs appear in all copies of this software. |
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23 | |
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24 | IN NO EVENT SHALL THE UNIVERSITY OF COLORADO BE LIABLE TO ANY PARTY FOR |
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25 | DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT |
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26 | OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF |
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27 | COLORADO HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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28 | |
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29 | THE UNIVERSITY OF COLORADO SPECIFICALLY DISCLAIMS ANY WARRANTIES, |
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30 | INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
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31 | FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN |
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32 | "AS IS" BASIS, AND THE UNIVERSITY OF COLORADO HAS NO OBLIGATION TO PROVIDE |
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33 | MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.] |
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34 | |
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35 | ******************************************************************************/ |
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36 | #include "imgInt.h" |
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37 | |
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38 | static char rcsid[] UNUSED = "$Id: imgTfmBwd.c,v 1.29 2002/08/18 04:47:07 fabio Exp $"; |
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39 | |
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40 | /*---------------------------------------------------------------------------*/ |
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41 | /* Constant declarations */ |
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42 | /*---------------------------------------------------------------------------*/ |
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43 | |
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44 | /*---------------------------------------------------------------------------*/ |
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45 | /* Type declarations */ |
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46 | /*---------------------------------------------------------------------------*/ |
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47 | |
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48 | /*---------------------------------------------------------------------------*/ |
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49 | /* Structure declarations */ |
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50 | /*---------------------------------------------------------------------------*/ |
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51 | |
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52 | /*---------------------------------------------------------------------------*/ |
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53 | /* Variable declarations */ |
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54 | /*---------------------------------------------------------------------------*/ |
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55 | |
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56 | /*---------------------------------------------------------------------------*/ |
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57 | /* Macro declarations */ |
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58 | /*---------------------------------------------------------------------------*/ |
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59 | |
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60 | /**AutomaticStart*************************************************************/ |
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61 | |
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62 | /*---------------------------------------------------------------------------*/ |
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63 | /* Static function prototypes */ |
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64 | /*---------------------------------------------------------------------------*/ |
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65 | |
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66 | static bdd_t * PreImageByDomainCofactoring(ImgTfmInfo_t *info, array_t *delta, bdd_t *image, array_t *relationArray, mdd_t *cofactorCube, mdd_t *abstractCube, int splitMethod, int turnDepth, int depth); |
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67 | static mdd_t * PreImageByStaticDomainCofactoring(ImgTfmInfo_t *info, array_t *vector, mdd_t *from, array_t *relationArray, int turnDepth, int depth); |
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68 | static bdd_t * PreImageByConstraintCofactoring(ImgTfmInfo_t *info, array_t *delta, bdd_t *image, int splitMethod, int turnDepth, int depth); |
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69 | static mdd_t * PreImageBySubstitution(ImgTfmInfo_t *info, array_t *vector, mdd_t *from); |
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70 | static bdd_t * PreImageMakeVectorCanonical(ImgTfmInfo_t *info, array_t *vector, bdd_t *image, array_t *relationArray, array_t **newVector, array_t **newRelationArray, mdd_t **cofactorCube, mdd_t **abstractCube); |
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71 | static bdd_t * PreImageMakeRelationCanonical(ImgTfmInfo_t *info, array_t *vector, bdd_t *image, array_t *relationArray, array_t **newVector, array_t **newRelationArray); |
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72 | static bdd_t * PreImageDeleteOneComponent(ImgTfmInfo_t *info, array_t *delta, int index, array_t **newDelta); |
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73 | static int PreImageChooseSplitVar(ImgTfmInfo_t *info, array_t *delta, bdd_t *img, int splitMethod, int split); |
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74 | static mdd_t * DomainCofactoring(ImgTfmInfo_t *info, array_t *vector, mdd_t *from, array_t *relationArray, mdd_t *c, array_t **newVector, array_t **newRelationArray, mdd_t **cofactorCube, mdd_t **abstractCube); |
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75 | static int CheckPreImageVector(ImgTfmInfo_t *info, array_t *vector, mdd_t *image); |
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76 | |
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77 | /**AutomaticEnd***************************************************************/ |
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78 | |
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79 | |
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80 | /*---------------------------------------------------------------------------*/ |
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81 | /* Definition of exported functions */ |
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82 | /*---------------------------------------------------------------------------*/ |
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83 | |
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84 | |
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85 | /*---------------------------------------------------------------------------*/ |
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86 | /* Definition of internal functions */ |
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87 | /*---------------------------------------------------------------------------*/ |
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88 | |
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89 | |
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90 | /**Function******************************************************************** |
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91 | |
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92 | Synopsis [Computes a preimage with transition function method.] |
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93 | |
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94 | Description [Computes a preimage with transition function method.] |
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95 | |
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96 | SideEffects [] |
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97 | |
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98 | ******************************************************************************/ |
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99 | bdd_t * |
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100 | ImgTfmPreImage(ImgTfmInfo_t *info, bdd_t *image) |
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101 | { |
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102 | bdd_t *preImg, *pre; |
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103 | int turnDepth; |
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104 | bdd_t *refResult, *one; |
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105 | array_t *relationArray; |
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106 | int partial; |
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107 | bdd_t *from; |
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108 | array_t *vector; |
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109 | |
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110 | if (bdd_is_tautology(image, 1)) { |
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111 | preImg = mdd_one(info->manager); |
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112 | return(preImg); |
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113 | } else if (bdd_is_tautology(image, 0)) { |
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114 | preImg = mdd_zero(info->manager); |
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115 | return(preImg); |
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116 | } |
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117 | |
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118 | info->maxIntermediateSize = 0; |
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119 | if (info->buildTR) { |
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120 | if (info->option->preSplitMethod == 4 && |
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121 | info->option->preSplitMaxDepth < 0 && |
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122 | info->option->buildPartialTR == FALSE && |
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123 | info->preKeepPiInTr == FALSE && |
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124 | info->option->preCanonical == FALSE) { |
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125 | mdd_t *range; |
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126 | range = ImgSubstitute(image, info->functionData, Img_D2R_c); |
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127 | preImg = ImgBddLinearAndSmooth(info->manager, range, |
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128 | info->bwdClusteredRelationArray, |
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129 | info->bwdArraySmoothVarBddArray, |
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130 | info->bwdSmoothVarCubeArray, |
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131 | info->option->verbosity); |
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132 | mdd_free(range); |
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133 | return(preImg); |
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134 | } |
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135 | relationArray = mdd_array_duplicate(info->bwdClusteredRelationArray); |
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136 | } else |
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137 | relationArray = NIL(array_t); |
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138 | |
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139 | one = mdd_one(info->manager); |
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140 | |
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141 | vector = info->vector; |
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142 | from = image; |
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143 | |
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144 | partial = 0; |
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145 | if (info->option->preSplitMethod == 0) { |
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146 | preImg = PreImageByDomainCofactoring(info, vector, from, |
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147 | NIL(array_t), NIL(mdd_t), NIL(mdd_t), |
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148 | info->option->preSplitMethod, 0, 0); |
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149 | } else if (info->option->preSplitMethod == 1) { |
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150 | preImg = PreImageByConstraintCofactoring(info, vector, from, |
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151 | info->option->preSplitMethod, |
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152 | 0, 0); |
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153 | } else if (info->option->preSplitMethod == 3) { |
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154 | preImg = PreImageBySubstitution(info, vector, from); |
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155 | } else { |
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156 | turnDepth = info->option->turnDepth; |
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157 | if (turnDepth == 0) { |
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158 | if (info->option->preSplitMethod == 2) { |
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159 | preImg = PreImageByConstraintCofactoring(info, vector, from, |
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160 | info->option->preSplitMethod, |
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161 | turnDepth, 0); |
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162 | } else |
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163 | preImg = ImgPreImageByHybrid(info, vector, from); |
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164 | } else if (info->option->preSplitMethod == 2) { |
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165 | preImg = PreImageByDomainCofactoring(info, vector, from, |
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166 | relationArray, |
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167 | NIL(mdd_t), NIL(mdd_t), |
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168 | info->option->preSplitMethod, |
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169 | turnDepth, 0); |
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170 | } else { |
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171 | if (info->buildTR) { |
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172 | if (info->buildTR == 2) { |
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173 | if (info->buildPartialTR) { |
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174 | preImg = PreImageByStaticDomainCofactoring(info, vector, |
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175 | from, relationArray, |
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176 | turnDepth, 0); |
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177 | partial = 1; |
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178 | } else { |
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179 | preImg = PreImageByStaticDomainCofactoring(info, NIL(array_t), |
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180 | from, relationArray, |
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181 | turnDepth, 0); |
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182 | } |
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183 | } else if (info->option->delayedSplit) { |
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184 | preImg = PreImageByDomainCofactoring(info, vector, from, |
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185 | relationArray, one, one, |
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186 | info->option->preSplitMethod, |
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187 | turnDepth, 0); |
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188 | } else { |
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189 | preImg = PreImageByDomainCofactoring(info, vector, from, |
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190 | relationArray, |
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191 | NIL(mdd_t), NIL(mdd_t), |
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192 | info->option->preSplitMethod, |
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193 | turnDepth, 0); |
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194 | } |
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195 | } else { |
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196 | preImg = PreImageByDomainCofactoring(info, vector, from, |
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197 | relationArray, |
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198 | NIL(mdd_t), NIL(mdd_t), |
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199 | info->option->preSplitMethod, |
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200 | turnDepth, 0); |
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201 | } |
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202 | } |
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203 | } |
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204 | mdd_free(one); |
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205 | |
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206 | if (info->option->debug) { |
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207 | if (info->buildTR == 2) { |
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208 | refResult = ImgPreImageByHybridWithStaticSplit(info, NIL(array_t), |
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209 | image, relationArray, |
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210 | NIL(mdd_t), NIL(mdd_t)); |
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211 | } else { |
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212 | if (partial) { |
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213 | refResult = ImgPreImageByHybridWithStaticSplit(info, info->vector, |
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214 | image, relationArray, |
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215 | NIL(mdd_t), NIL(mdd_t)); |
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216 | } else |
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217 | refResult = ImgPreImageByHybrid(info, info->vector, image); |
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218 | } |
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219 | assert(mdd_equal_mod_care_set_array(refResult, preImg, |
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220 | info->toCareSetArray)); |
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221 | mdd_free(refResult); |
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222 | } |
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223 | |
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224 | if (relationArray) |
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225 | mdd_array_free(relationArray); |
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226 | |
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227 | if (info->preCache && info->option->autoFlushCache == 1) |
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228 | ImgFlushCache(info->preCache); |
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229 | if (info->preKeepPiInTr == TRUE) { |
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230 | if (info->functionData->quantifyCube) |
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231 | pre = bdd_smooth_with_cube(preImg, info->functionData->quantifyCube); |
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232 | else |
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233 | pre = bdd_smooth(preImg, info->functionData->quantifyBddVars); |
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234 | mdd_free(preImg); |
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235 | } else |
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236 | pre = preImg; |
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237 | if (info->option->verbosity) { |
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238 | fprintf(vis_stdout, |
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239 | "** tfm info: max BDD size for intermediate product = %d\n", |
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240 | info->maxIntermediateSize); |
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241 | } |
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242 | return(pre); |
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243 | } |
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244 | |
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245 | |
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246 | /*---------------------------------------------------------------------------*/ |
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247 | /* Definition of static functions */ |
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248 | /*---------------------------------------------------------------------------*/ |
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249 | |
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250 | |
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251 | /**Function******************************************************************** |
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252 | |
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253 | Synopsis [Computes preimage with domain cofactoring method.] |
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254 | |
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255 | Description [Computes preimage with domain cofactoring method.] |
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256 | |
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257 | SideEffects [] |
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258 | |
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259 | ******************************************************************************/ |
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260 | static bdd_t * |
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261 | PreImageByDomainCofactoring(ImgTfmInfo_t *info, array_t *delta, bdd_t *image, |
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262 | array_t *relationArray, |
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263 | mdd_t *cofactorCube, mdd_t *abstractCube, |
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264 | int splitMethod, int turnDepth, int depth) |
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265 | { |
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266 | array_t *newDelta, *tmpDelta, *vectorT, *vectorE; |
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267 | bdd_t *preImg, *preImgT, *preImgE, *imgT, *imgE, *newImg, *tmpImg; |
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268 | int split; |
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269 | bdd_t *var, *varNot, *refResult; |
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270 | int nRecur; |
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271 | array_t *relationArrayT, *relationArrayE; |
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272 | array_t *newRelationArray, *tmpRelationArray; |
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273 | mdd_t *cofactorCubeT, *cofactorCubeE; |
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274 | mdd_t *abstractCubeT, *abstractCubeE; |
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275 | mdd_t *newCofactorCube, *newAbstractCube; |
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276 | mdd_t *cofactor, *abstract; |
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277 | mdd_t *essentialCube, *tmp; |
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278 | int findEssential; |
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279 | int foundEssentialDepth, foundEssentialDepthT, foundEssentialDepthE; |
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280 | int turnFlag, size; |
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281 | mdd_t *saveCareSet = NIL(mdd_t); |
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282 | |
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283 | newRelationArray = NIL(array_t); |
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284 | |
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285 | if (info->option->checkEquivalence && relationArray) { |
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286 | assert(ImgCheckEquivalence(info, delta, relationArray, |
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287 | cofactorCube, abstractCube, 1)); |
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288 | } |
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289 | |
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290 | info->nRecursionB++; |
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291 | if (info->option->debug) { |
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292 | if (relationArray) { |
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293 | refResult = ImgPreImageByHybrid(info, delta, image); |
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294 | preImg = ImgPreImageByHybridWithStaticSplit(info, NIL(array_t), image, |
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295 | relationArray, |
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296 | cofactorCube, abstractCube); |
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297 | tmp = refResult; |
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298 | refResult = mdd_and(tmp, info->debugCareSet, 1, 1); |
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299 | mdd_free(tmp); |
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300 | tmp = preImg; |
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301 | preImg = mdd_and(tmp, info->debugCareSet, 1, 1); |
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302 | mdd_free(tmp); |
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303 | assert(mdd_equal_mod_care_set_array(refResult, preImg, |
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304 | info->toCareSetArray)); |
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305 | mdd_free(refResult); |
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306 | mdd_free(preImg); |
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307 | } |
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308 | } |
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309 | |
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310 | if (info->nIntermediateVars) |
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311 | size = ImgVectorFunctionSize(delta); |
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312 | else |
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313 | size = array_n(delta); |
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314 | if (size == 1) { |
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315 | preImg = PreImageBySubstitution(info, delta, image); |
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316 | info->averageDepthB = (info->averageDepthB * (float)info->nLeavesB + |
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317 | (float)depth) / (float)(info->nLeavesB + 1); |
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318 | if (depth > info->maxDepthB) |
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319 | info->maxDepthB = depth; |
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320 | info->nLeavesB++; |
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321 | info->foundEssentialDepth = info->option->maxEssentialDepth; |
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322 | return(preImg); |
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323 | } |
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324 | |
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325 | if (info->option->findEssential) { |
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326 | if (info->option->findEssential == 1) |
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327 | findEssential = 1; |
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328 | else { |
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329 | if (depth >= info->lastFoundEssentialDepth) |
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330 | findEssential = 1; |
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331 | else |
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332 | findEssential = 0; |
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333 | } |
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334 | } else |
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335 | findEssential = 0; |
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336 | if (findEssential) { |
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337 | essentialCube = bdd_find_essential_cube(image); |
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338 | |
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339 | if (!bdd_is_tautology(essentialCube, 1)) { |
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340 | info->averageFoundEssential = (info->averageFoundEssential * |
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341 | (float)info->nFoundEssentials + (float)(bdd_size(essentialCube) - 1)) / |
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342 | (float)(info->nFoundEssentials + 1); |
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343 | info->averageFoundEssentialDepth = (info->averageFoundEssentialDepth * |
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344 | (float)info->nFoundEssentials + (float)depth) / |
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345 | (float)(info->nFoundEssentials + 1); |
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346 | if (info->nFoundEssentials == 0 || depth < info->topFoundEssentialDepth) |
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347 | info->topFoundEssentialDepth = depth; |
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348 | if (info->option->printEssential && depth < IMG_TF_MAX_PRINT_DEPTH) |
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349 | info->foundEssentials[depth]++; |
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350 | info->nFoundEssentials++; |
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351 | if (info->option->delayedSplit && relationArray) { |
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352 | tmpRelationArray = relationArray; |
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353 | tmpImg = ImgVectorMinimize(info, delta, essentialCube, image, |
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354 | tmpRelationArray, &tmpDelta, NIL(mdd_t *), |
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355 | NIL(array_t *), &cofactor, &abstract); |
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356 | if (bdd_is_tautology(cofactor, 1)) |
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357 | newCofactorCube = cofactorCube; |
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358 | else |
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359 | newCofactorCube = mdd_and(cofactorCube, cofactor, 1, 1); |
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360 | mdd_free(cofactor); |
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361 | if (bdd_is_tautology(abstract, 1)) |
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362 | newAbstractCube = abstractCube; |
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363 | else |
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364 | newAbstractCube = mdd_and(abstractCube, abstract, 1, 1); |
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365 | mdd_free(abstract); |
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366 | } else { |
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367 | if (relationArray) |
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368 | tmpRelationArray = mdd_array_duplicate(relationArray); |
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369 | else |
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370 | tmpRelationArray = relationArray; |
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371 | tmpImg = ImgVectorMinimize(info, delta, essentialCube, image, |
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372 | tmpRelationArray, &tmpDelta, NIL(mdd_t *), |
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373 | NIL(array_t *), NIL(mdd_t *), NIL(mdd_t *)); |
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374 | newCofactorCube = cofactorCube; |
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375 | newAbstractCube = abstractCube; |
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376 | } |
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377 | foundEssentialDepth = depth; |
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378 | } else { |
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379 | tmpDelta = delta; |
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380 | tmpRelationArray = relationArray; |
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381 | tmpImg = image; |
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382 | newCofactorCube = cofactorCube; |
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383 | newAbstractCube = abstractCube; |
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384 | foundEssentialDepth = info->option->maxEssentialDepth; |
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385 | } |
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386 | mdd_free(essentialCube); |
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387 | foundEssentialDepthT = info->option->maxEssentialDepth; |
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388 | foundEssentialDepthE = info->option->maxEssentialDepth; |
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389 | } else { |
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390 | tmpDelta = delta; |
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391 | tmpRelationArray = relationArray; |
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392 | tmpImg = image; |
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393 | newCofactorCube = cofactorCube; |
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394 | newAbstractCube = abstractCube; |
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395 | /* To remove compiler warnings */ |
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396 | foundEssentialDepth = -1; |
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397 | foundEssentialDepthT = -1; |
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398 | foundEssentialDepthE = -1; |
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399 | } |
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400 | |
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401 | if (!info->option->preCanonical) { |
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402 | newImg = tmpImg; |
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403 | newDelta = tmpDelta; |
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404 | newRelationArray = tmpRelationArray; |
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405 | } else if (info->option->delayedSplit && relationArray) { |
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406 | newImg = PreImageMakeVectorCanonical(info, tmpDelta, tmpImg, |
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407 | tmpRelationArray, &newDelta, |
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408 | &newRelationArray, |
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409 | &cofactor, &abstract); |
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410 | if (!bdd_is_tautology(cofactor, 1)) { |
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411 | if (newCofactorCube == cofactorCube) |
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412 | newCofactorCube = mdd_and(cofactorCube, cofactor, 1, 1); |
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413 | else { |
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414 | tmp = newCofactorCube; |
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415 | newCofactorCube = mdd_and(tmp, cofactor, 1, 1); |
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416 | mdd_free(tmp); |
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417 | } |
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418 | } |
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419 | mdd_free(cofactor); |
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420 | if (!bdd_is_tautology(abstract, 1)) { |
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421 | if (newAbstractCube == abstractCube) |
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422 | newAbstractCube = mdd_and(abstractCube, abstract, 1, 1); |
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423 | else { |
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424 | tmp = newAbstractCube; |
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425 | newAbstractCube = mdd_and(tmp, abstract, 1, 1); |
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426 | mdd_free(tmp); |
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427 | } |
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428 | } |
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429 | mdd_free(abstract); |
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430 | } else { |
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431 | newImg = PreImageMakeVectorCanonical(info, tmpDelta, tmpImg, |
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432 | tmpRelationArray, &newDelta, |
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433 | &newRelationArray, |
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434 | NIL(mdd_t *), NIL(mdd_t *)); |
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435 | } |
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436 | if (tmpDelta != delta) |
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437 | ImgVectorFree(tmpDelta); |
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438 | if (tmpImg != image) |
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439 | mdd_free(tmpImg); |
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440 | if (tmpRelationArray && tmpRelationArray != relationArray && |
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441 | tmpRelationArray != newRelationArray) { |
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442 | mdd_array_free(tmpRelationArray); |
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443 | } |
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444 | |
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445 | if (info->option->debug) { |
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446 | if (relationArray) { |
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447 | refResult = ImgPreImageByHybrid(info, newDelta, newImg); |
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448 | preImg = ImgPreImageByHybridWithStaticSplit(info, NIL(array_t), newImg, |
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449 | newRelationArray, |
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450 | newCofactorCube, |
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451 | newAbstractCube); |
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452 | tmp = refResult; |
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453 | refResult = mdd_and(tmp, info->debugCareSet, 1, 1); |
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454 | mdd_free(tmp); |
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455 | tmp = preImg; |
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456 | preImg = mdd_and(tmp, info->debugCareSet, 1, 1); |
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457 | mdd_free(tmp); |
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458 | assert(mdd_equal_mod_care_set_array(refResult, preImg, |
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459 | info->toCareSetArray)); |
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460 | mdd_free(refResult); |
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461 | mdd_free(preImg); |
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462 | } |
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463 | } |
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464 | |
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465 | if (bdd_is_tautology(newImg, 1) || bdd_is_tautology(newImg, 0)) { |
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466 | info->averageDepthB = (info->averageDepthB * (float)info->nLeavesB + |
---|
467 | (float)depth) / (float)(info->nLeavesB + 1); |
---|
468 | if (depth > info->maxDepthB) |
---|
469 | info->maxDepthB = depth; |
---|
470 | info->nLeavesB++; |
---|
471 | if (info->option->debug) { |
---|
472 | refResult = ImgPreImageByHybrid(info, newDelta, newImg); |
---|
473 | tmp = refResult; |
---|
474 | refResult = mdd_and(tmp, info->debugCareSet, 1, 1); |
---|
475 | mdd_free(tmp); |
---|
476 | tmp = mdd_and(newImg, info->debugCareSet, 1, 1); |
---|
477 | assert(mdd_equal_mod_care_set_array(refResult, tmp, |
---|
478 | info->toCareSetArray)); |
---|
479 | mdd_free(refResult); |
---|
480 | mdd_free(tmp); |
---|
481 | } |
---|
482 | if (newDelta != delta) |
---|
483 | ImgVectorFree(newDelta); |
---|
484 | if (relationArray && newRelationArray != relationArray) |
---|
485 | mdd_array_free(newRelationArray); |
---|
486 | if (newCofactorCube && newCofactorCube != cofactorCube) |
---|
487 | mdd_free(newCofactorCube); |
---|
488 | if (newAbstractCube && newAbstractCube != abstractCube) |
---|
489 | mdd_free(newAbstractCube); |
---|
490 | if (findEssential) |
---|
491 | info->foundEssentialDepth = foundEssentialDepth; |
---|
492 | return(newImg); |
---|
493 | } |
---|
494 | if (array_n(newDelta) <= 1) { |
---|
495 | if (array_n(newDelta) == 0) |
---|
496 | preImg = newImg; |
---|
497 | else { |
---|
498 | assert(array_n(newDelta) == 1); |
---|
499 | preImg = PreImageBySubstitution(info, newDelta, newImg); |
---|
500 | mdd_free(newImg); |
---|
501 | } |
---|
502 | info->averageDepthB = (info->averageDepthB * (float)info->nLeavesB + |
---|
503 | (float)depth) / (float)(info->nLeavesB + 1); |
---|
504 | if (depth > info->maxDepthB) |
---|
505 | info->maxDepthB = depth; |
---|
506 | info->nLeavesB++; |
---|
507 | if (info->option->debug) { |
---|
508 | refResult = ImgPreImageByHybrid(info, delta, image); |
---|
509 | tmp = refResult; |
---|
510 | refResult = mdd_and(tmp, info->debugCareSet, 1, 1); |
---|
511 | mdd_free(tmp); |
---|
512 | tmp = mdd_and(preImg, info->debugCareSet, 1, 1); |
---|
513 | assert(mdd_equal_mod_care_set_array(refResult, tmp, |
---|
514 | info->toCareSetArray)); |
---|
515 | mdd_free(refResult); |
---|
516 | mdd_free(tmp); |
---|
517 | } |
---|
518 | if (newDelta != delta) |
---|
519 | ImgVectorFree(newDelta); |
---|
520 | if (relationArray && newRelationArray != relationArray) |
---|
521 | mdd_array_free(newRelationArray); |
---|
522 | if (newCofactorCube && newCofactorCube != cofactorCube) |
---|
523 | mdd_free(newCofactorCube); |
---|
524 | if (newAbstractCube && newAbstractCube != abstractCube) |
---|
525 | mdd_free(newAbstractCube); |
---|
526 | if (findEssential) |
---|
527 | info->foundEssentialDepth = foundEssentialDepth; |
---|
528 | return(preImg); |
---|
529 | } |
---|
530 | |
---|
531 | if (info->preCache) { |
---|
532 | preImg = ImgCacheLookupTable(info, info->preCache, newDelta, newImg); |
---|
533 | if (preImg) { |
---|
534 | info->averageDepthB = (info->averageDepthB * (float)info->nLeavesB + |
---|
535 | (float)depth) / (float)(info->nLeavesB + 1); |
---|
536 | if (depth > info->maxDepthB) |
---|
537 | info->maxDepthB = depth; |
---|
538 | info->nLeavesB++; |
---|
539 | if (info->option->debug) { |
---|
540 | refResult = ImgPreImageByHybrid(info, newDelta, newImg); |
---|
541 | tmp = refResult; |
---|
542 | refResult = mdd_and(tmp, info->debugCareSet, 1, 1); |
---|
543 | mdd_free(tmp); |
---|
544 | tmp = mdd_and(preImg, info->debugCareSet, 1, 1); |
---|
545 | assert(mdd_equal_mod_care_set_array(refResult, tmp, |
---|
546 | info->toCareSetArray)); |
---|
547 | mdd_free(refResult); |
---|
548 | mdd_free(tmp); |
---|
549 | } |
---|
550 | if (newDelta != delta) |
---|
551 | ImgVectorFree(newDelta); |
---|
552 | if (newImg != image) |
---|
553 | mdd_free(newImg); |
---|
554 | if (relationArray && newRelationArray != relationArray) |
---|
555 | mdd_array_free(newRelationArray); |
---|
556 | if (newCofactorCube && newCofactorCube != cofactorCube) |
---|
557 | mdd_free(newCofactorCube); |
---|
558 | if (newAbstractCube && newAbstractCube != abstractCube) |
---|
559 | mdd_free(newAbstractCube); |
---|
560 | if (findEssential) |
---|
561 | info->foundEssentialDepth = foundEssentialDepth; |
---|
562 | return(preImg); |
---|
563 | } |
---|
564 | } |
---|
565 | |
---|
566 | turnFlag = 0; |
---|
567 | if (splitMethod == 4 && turnDepth == -1) { |
---|
568 | if (depth < info->option->preSplitMinDepth) { |
---|
569 | info->nSplitsB++; |
---|
570 | turnFlag = 0; |
---|
571 | } else if (depth > info->option->preSplitMaxDepth) { |
---|
572 | info->nConjoinsB++; |
---|
573 | turnFlag = 1; |
---|
574 | } else { |
---|
575 | turnFlag = ImgDecideSplitOrConjoin(info, newDelta, newImg, 1, |
---|
576 | newRelationArray, newCofactorCube, |
---|
577 | newAbstractCube, 0, depth); |
---|
578 | } |
---|
579 | } else { |
---|
580 | if (depth == turnDepth) |
---|
581 | turnFlag = 1; |
---|
582 | else |
---|
583 | turnFlag = 0; |
---|
584 | } |
---|
585 | if (turnFlag) { |
---|
586 | if (splitMethod == 2) { |
---|
587 | preImg = PreImageByConstraintCofactoring(info, newDelta, newImg, |
---|
588 | info->option->preSplitMethod, |
---|
589 | 0, depth + 1); |
---|
590 | } else { |
---|
591 | if (relationArray) { |
---|
592 | preImg = ImgPreImageByHybridWithStaticSplit(info, NIL(array_t), newImg, |
---|
593 | newRelationArray, |
---|
594 | newCofactorCube, |
---|
595 | newAbstractCube); |
---|
596 | } else |
---|
597 | preImg = ImgPreImageByHybrid(info, newDelta, newImg); |
---|
598 | } |
---|
599 | if (info->option->debug) { |
---|
600 | refResult = ImgPreImageByHybrid(info, newDelta, newImg); |
---|
601 | tmp = refResult; |
---|
602 | refResult = mdd_and(tmp, info->debugCareSet, 1, 1); |
---|
603 | mdd_free(tmp); |
---|
604 | tmp = mdd_and(preImg, info->debugCareSet, 1, 1); |
---|
605 | assert(mdd_equal_mod_care_set_array(refResult, tmp, |
---|
606 | info->toCareSetArray)); |
---|
607 | mdd_free(refResult); |
---|
608 | mdd_free(tmp); |
---|
609 | } |
---|
610 | if (splitMethod == 4) { |
---|
611 | if (info->preCache) |
---|
612 | ImgCacheInsertTable(info->preCache, newDelta, newImg, mdd_dup(preImg)); |
---|
613 | else { |
---|
614 | if (newDelta != delta) |
---|
615 | ImgVectorFree(newDelta); |
---|
616 | if (newImg != image) |
---|
617 | mdd_free(newImg); |
---|
618 | } |
---|
619 | info->averageDepthB = (info->averageDepthB * (float)info->nLeavesB + |
---|
620 | (float)depth) / (float)(info->nLeavesB + 1); |
---|
621 | if (depth > info->maxDepthB) |
---|
622 | info->maxDepthB = depth; |
---|
623 | info->nLeavesB++; |
---|
624 | } else { |
---|
625 | if (newDelta != delta) |
---|
626 | ImgVectorFree(newDelta); |
---|
627 | if (newImg != image) |
---|
628 | mdd_free(newImg); |
---|
629 | } |
---|
630 | if (relationArray && newRelationArray != relationArray) |
---|
631 | mdd_array_free(newRelationArray); |
---|
632 | if (newCofactorCube && newCofactorCube != cofactorCube) |
---|
633 | mdd_free(newCofactorCube); |
---|
634 | if (newAbstractCube && newAbstractCube != abstractCube) |
---|
635 | mdd_free(newAbstractCube); |
---|
636 | info->nTurnsB++; |
---|
637 | if (findEssential) |
---|
638 | info->foundEssentialDepth = foundEssentialDepth; |
---|
639 | return(preImg); |
---|
640 | } |
---|
641 | |
---|
642 | split = PreImageChooseSplitVar(info, newDelta, newImg, |
---|
643 | 0, info->option->preInputSplit); |
---|
644 | |
---|
645 | /* No more present state variable to split */ |
---|
646 | if (split == -1) { |
---|
647 | if (info->option->preDcLeafMethod == 0 || |
---|
648 | info->option->preDcLeafMethod == 2) { |
---|
649 | if (info->option->preDcLeafMethod == 0) |
---|
650 | preImg = PreImageBySubstitution(info, newDelta, newImg); |
---|
651 | else if (relationArray) { |
---|
652 | preImg = ImgPreImageByHybridWithStaticSplit(info, NIL(array_t), newImg, |
---|
653 | newRelationArray, |
---|
654 | newCofactorCube, |
---|
655 | newAbstractCube); |
---|
656 | } else |
---|
657 | preImg = ImgPreImageByHybrid(info, newDelta, newImg); |
---|
658 | if (info->preCache) |
---|
659 | ImgCacheInsertTable(info->preCache, newDelta, newImg, mdd_dup(preImg)); |
---|
660 | info->averageDepthB = (info->averageDepthB * (float)info->nLeavesB + |
---|
661 | (float)depth) / (float)(info->nLeavesB + 1); |
---|
662 | if (depth > info->maxDepthB) |
---|
663 | info->maxDepthB = depth; |
---|
664 | info->nLeavesB++; |
---|
665 | } else { |
---|
666 | preImg = PreImageByConstraintCofactoring(info, newDelta, newImg, |
---|
667 | splitMethod, turnDepth, |
---|
668 | depth + 1); |
---|
669 | info->nRecursionB--; |
---|
670 | } |
---|
671 | if (splitMethod == 0) |
---|
672 | info->nTurnsB++; |
---|
673 | if (info->option->debug) { |
---|
674 | refResult = ImgPreImageByHybrid(info, newDelta, newImg); |
---|
675 | tmp = refResult; |
---|
676 | refResult = mdd_and(tmp, info->debugCareSet, 1, 1); |
---|
677 | mdd_free(tmp); |
---|
678 | tmp = mdd_and(preImg, info->debugCareSet, 1, 1); |
---|
679 | assert(mdd_equal_mod_care_set_array(refResult, tmp, |
---|
680 | info->toCareSetArray)); |
---|
681 | mdd_free(refResult); |
---|
682 | mdd_free(tmp); |
---|
683 | } |
---|
684 | if (info->option->preDcLeafMethod != 0 || !info->preCache) { |
---|
685 | if (newDelta != delta) |
---|
686 | ImgVectorFree(newDelta); |
---|
687 | if (newImg != image) |
---|
688 | mdd_free(newImg); |
---|
689 | } |
---|
690 | if (relationArray && newRelationArray != relationArray) |
---|
691 | mdd_array_free(newRelationArray); |
---|
692 | if (newCofactorCube && newCofactorCube != cofactorCube) |
---|
693 | mdd_free(newCofactorCube); |
---|
694 | if (newAbstractCube && newAbstractCube != abstractCube) |
---|
695 | mdd_free(newAbstractCube); |
---|
696 | if (findEssential) |
---|
697 | info->foundEssentialDepth = foundEssentialDepth; |
---|
698 | return(preImg); |
---|
699 | } |
---|
700 | |
---|
701 | var = bdd_var_with_index(info->manager, split); |
---|
702 | varNot = mdd_not(var); |
---|
703 | if (info->option->delayedSplit && relationArray) { |
---|
704 | imgT = DomainCofactoring(info, newDelta, newImg, newRelationArray, var, |
---|
705 | &vectorT, &relationArrayT, &cofactor, &abstract); |
---|
706 | if (bdd_is_tautology(cofactor, 1)) |
---|
707 | cofactorCubeT = newCofactorCube; |
---|
708 | else |
---|
709 | cofactorCubeT = mdd_and(newCofactorCube, cofactor, 1, 1); |
---|
710 | mdd_free(cofactor); |
---|
711 | if (bdd_is_tautology(abstract, 1)) |
---|
712 | abstractCubeT = newAbstractCube; |
---|
713 | else |
---|
714 | abstractCubeT = mdd_and(newAbstractCube, abstract, 1, 1); |
---|
715 | mdd_free(abstract); |
---|
716 | |
---|
717 | imgE = DomainCofactoring(info, newDelta, newImg, newRelationArray, varNot, |
---|
718 | &vectorE, &relationArrayE, &cofactor, &abstract); |
---|
719 | if (bdd_is_tautology(cofactor, 1)) |
---|
720 | cofactorCubeE = newCofactorCube; |
---|
721 | else |
---|
722 | cofactorCubeE = mdd_and(newCofactorCube, cofactor, 1, 1); |
---|
723 | mdd_free(cofactor); |
---|
724 | if (bdd_is_tautology(abstract, 1)) |
---|
725 | abstractCubeE = newAbstractCube; |
---|
726 | else |
---|
727 | abstractCubeE = mdd_and(newAbstractCube, abstract, 1, 1); |
---|
728 | mdd_free(abstract); |
---|
729 | } else { |
---|
730 | imgT = DomainCofactoring(info, newDelta, newImg, newRelationArray, var, |
---|
731 | &vectorT, &relationArrayT, |
---|
732 | NIL(mdd_t *), NIL(mdd_t *)); |
---|
733 | cofactorCubeT = NIL(mdd_t); |
---|
734 | abstractCubeT = NIL(mdd_t); |
---|
735 | |
---|
736 | imgE = DomainCofactoring(info, newDelta, newImg, newRelationArray, varNot, |
---|
737 | &vectorE, &relationArrayE, |
---|
738 | NIL(mdd_t *), NIL(mdd_t *)); |
---|
739 | cofactorCubeE = NIL(mdd_t); |
---|
740 | abstractCubeE = NIL(mdd_t); |
---|
741 | } |
---|
742 | if (relationArray && newRelationArray != relationArray) |
---|
743 | mdd_array_free(newRelationArray); |
---|
744 | mdd_free(varNot); |
---|
745 | |
---|
746 | if (!info->preCache && !info->option->debug) { |
---|
747 | if (newDelta != delta) |
---|
748 | ImgVectorFree(newDelta); |
---|
749 | if (newImg != image) |
---|
750 | mdd_free(newImg); |
---|
751 | } |
---|
752 | |
---|
753 | nRecur = 0; |
---|
754 | if (bdd_is_tautology(imgT, 1)) |
---|
755 | preImgT = mdd_one(info->manager); |
---|
756 | else if (bdd_is_tautology(imgT, 0)) |
---|
757 | preImgT = mdd_zero(info->manager); |
---|
758 | else { |
---|
759 | if (info->option->debug) { |
---|
760 | saveCareSet = info->debugCareSet; |
---|
761 | info->debugCareSet = mdd_and(saveCareSet, var, 1, 1); |
---|
762 | } |
---|
763 | preImgT = PreImageByDomainCofactoring(info, vectorT, imgT, relationArrayT, |
---|
764 | cofactorCubeT, abstractCubeT, |
---|
765 | splitMethod, turnDepth, |
---|
766 | depth + 1); |
---|
767 | if (info->option->debug) { |
---|
768 | mdd_free(info->debugCareSet); |
---|
769 | info->debugCareSet = saveCareSet; |
---|
770 | } |
---|
771 | if (findEssential) |
---|
772 | foundEssentialDepthT = info->foundEssentialDepth; |
---|
773 | nRecur++; |
---|
774 | } |
---|
775 | ImgVectorFree(vectorT); |
---|
776 | mdd_free(imgT); |
---|
777 | if (relationArrayT && relationArrayT != newRelationArray) |
---|
778 | mdd_array_free(relationArrayT); |
---|
779 | if (cofactorCubeT && cofactorCubeT != newCofactorCube) |
---|
780 | mdd_free(cofactorCubeT); |
---|
781 | if (abstractCubeT && abstractCubeT != newAbstractCube) |
---|
782 | mdd_free(abstractCubeT); |
---|
783 | |
---|
784 | if (bdd_is_tautology(imgE, 1)) |
---|
785 | preImgE = mdd_one(info->manager); |
---|
786 | else if (bdd_is_tautology(imgE, 0)) |
---|
787 | preImgE = mdd_zero(info->manager); |
---|
788 | else { |
---|
789 | if (info->option->debug) { |
---|
790 | saveCareSet = info->debugCareSet; |
---|
791 | info->debugCareSet = mdd_and(saveCareSet, var, 1, 0); |
---|
792 | } |
---|
793 | preImgE = PreImageByDomainCofactoring(info, vectorE, imgE, relationArrayE, |
---|
794 | cofactorCubeE, abstractCubeE, |
---|
795 | splitMethod, turnDepth, |
---|
796 | depth + 1); |
---|
797 | if (info->option->debug) { |
---|
798 | mdd_free(info->debugCareSet); |
---|
799 | info->debugCareSet = saveCareSet; |
---|
800 | } |
---|
801 | if (findEssential) |
---|
802 | foundEssentialDepthE = info->foundEssentialDepth; |
---|
803 | nRecur++; |
---|
804 | } |
---|
805 | ImgVectorFree(vectorE); |
---|
806 | mdd_free(imgE); |
---|
807 | if (relationArrayE && relationArrayT != newRelationArray) |
---|
808 | mdd_array_free(relationArrayE); |
---|
809 | if (cofactorCubeE && cofactorCubeE != newCofactorCube) |
---|
810 | mdd_free(cofactorCubeE); |
---|
811 | if (abstractCubeE && abstractCubeE != newAbstractCube) |
---|
812 | mdd_free(abstractCubeE); |
---|
813 | if (newCofactorCube && newCofactorCube != cofactorCube) |
---|
814 | mdd_free(newCofactorCube); |
---|
815 | if (newAbstractCube && newAbstractCube != abstractCube) |
---|
816 | mdd_free(newAbstractCube); |
---|
817 | |
---|
818 | preImg = bdd_ite(var, preImgT, preImgE, 1, 1, 1); |
---|
819 | if (info->option->verbosity) { |
---|
820 | size = bdd_size(preImg); |
---|
821 | if (size > info->maxIntermediateSize) |
---|
822 | info->maxIntermediateSize = size; |
---|
823 | if (info->option->printBddSize) { |
---|
824 | fprintf(vis_stdout, "** tfm info: bdd_ite(2,%d,%d) = %d\n", |
---|
825 | bdd_size(preImgT), bdd_size(preImgE), bdd_size(preImg)); |
---|
826 | } |
---|
827 | } |
---|
828 | mdd_free(var); |
---|
829 | mdd_free(preImgE); |
---|
830 | mdd_free(preImgT); |
---|
831 | |
---|
832 | if (info->preCache) |
---|
833 | ImgCacheInsertTable(info->preCache, newDelta, newImg, mdd_dup(preImg)); |
---|
834 | |
---|
835 | if (info->option->debug) { |
---|
836 | refResult = ImgPreImageByHybrid(info, newDelta, newImg); |
---|
837 | tmp = refResult; |
---|
838 | refResult = mdd_and(tmp, info->debugCareSet, 1, 1); |
---|
839 | mdd_free(tmp); |
---|
840 | tmp = mdd_and(preImg, info->debugCareSet, 1, 1); |
---|
841 | assert(mdd_equal_mod_care_set_array(refResult, tmp, |
---|
842 | info->toCareSetArray)); |
---|
843 | mdd_free(refResult); |
---|
844 | mdd_free(tmp); |
---|
845 | if (!info->preCache) { |
---|
846 | if (newDelta != delta) |
---|
847 | ImgVectorFree(newDelta); |
---|
848 | if (newImg != image) |
---|
849 | mdd_free(newImg); |
---|
850 | } |
---|
851 | } |
---|
852 | |
---|
853 | if (nRecur == 0) { |
---|
854 | info->averageDepthB = (info->averageDepthB * (float)info->nLeavesB + |
---|
855 | (float)depth) / (float)(info->nLeavesB + 1); |
---|
856 | if (depth > info->maxDepthB) |
---|
857 | info->maxDepthB = depth; |
---|
858 | info->nLeavesB++; |
---|
859 | } |
---|
860 | |
---|
861 | if (findEssential) { |
---|
862 | if (foundEssentialDepth == info->option->maxEssentialDepth) { |
---|
863 | if (foundEssentialDepthT < foundEssentialDepthE) |
---|
864 | foundEssentialDepth = foundEssentialDepthT; |
---|
865 | else |
---|
866 | foundEssentialDepth = foundEssentialDepthE; |
---|
867 | } |
---|
868 | info->foundEssentialDepth = foundEssentialDepth; |
---|
869 | } |
---|
870 | return(preImg); |
---|
871 | } |
---|
872 | |
---|
873 | |
---|
874 | /**Function******************************************************************** |
---|
875 | |
---|
876 | Synopsis [Computes a preimage by static input splitting.] |
---|
877 | |
---|
878 | Description [Computes a preimage by static input splitting.] |
---|
879 | |
---|
880 | SideEffects [] |
---|
881 | |
---|
882 | ******************************************************************************/ |
---|
883 | static mdd_t * |
---|
884 | PreImageByStaticDomainCofactoring(ImgTfmInfo_t *info, array_t *vector, |
---|
885 | mdd_t *from, array_t *relationArray, |
---|
886 | int turnDepth, int depth) |
---|
887 | { |
---|
888 | array_t *vectorT, *vectorE, *newVector; |
---|
889 | mdd_t *resT, *resE, *res, *cubeT, *cubeE; |
---|
890 | mdd_t *fromT, *fromE, *newFrom, *tmpFrom; |
---|
891 | mdd_t *var, *varNot; |
---|
892 | array_t *relationArrayT, *relationArrayE; |
---|
893 | array_t *newRelationArray, *tmpRelationArray; |
---|
894 | int nRecur; |
---|
895 | mdd_t *essentialCube, *refResult; |
---|
896 | int findEssential; |
---|
897 | int foundEssentialDepth, foundEssentialDepthT, foundEssentialDepthE; |
---|
898 | int turnFlag, size; |
---|
899 | mdd_t *saveCareSet = NIL(mdd_t), *tmp; |
---|
900 | |
---|
901 | info->nRecursionB++; |
---|
902 | |
---|
903 | turnFlag = 0; |
---|
904 | if (turnDepth == -1) { |
---|
905 | if (depth < info->option->preSplitMinDepth) { |
---|
906 | info->nSplitsB++; |
---|
907 | turnFlag = 0; |
---|
908 | } else if (depth > info->option->preSplitMaxDepth) { |
---|
909 | info->nConjoinsB++; |
---|
910 | turnFlag = 1; |
---|
911 | } else { |
---|
912 | turnFlag = ImgDecideSplitOrConjoin(info, vector, from, 1, |
---|
913 | relationArray, NIL(mdd_t), |
---|
914 | NIL(mdd_t), 1, depth); |
---|
915 | } |
---|
916 | } else { |
---|
917 | if (depth == turnDepth) |
---|
918 | turnFlag = 1; |
---|
919 | else |
---|
920 | turnFlag = 0; |
---|
921 | } |
---|
922 | if (turnFlag) { |
---|
923 | res = ImgPreImageByHybridWithStaticSplit(info, vector, from, relationArray, |
---|
924 | NIL(mdd_t), NIL(mdd_t)); |
---|
925 | info->averageDepthB = (info->averageDepthB * (float)info->nLeavesB + |
---|
926 | (float)depth) / (float)(info->nLeavesB + 1); |
---|
927 | if (depth > info->maxDepthB) |
---|
928 | info->maxDepthB = depth; |
---|
929 | info->nLeavesB++; |
---|
930 | info->foundEssentialDepth = info->option->maxEssentialDepth; |
---|
931 | return(res); |
---|
932 | } |
---|
933 | |
---|
934 | if (info->option->findEssential) { |
---|
935 | if (info->option->findEssential == 1) |
---|
936 | findEssential = 1; |
---|
937 | else { |
---|
938 | if (depth >= info->lastFoundEssentialDepth) |
---|
939 | findEssential = 1; |
---|
940 | else |
---|
941 | findEssential = 0; |
---|
942 | } |
---|
943 | } else |
---|
944 | findEssential = 0; |
---|
945 | if (findEssential) { |
---|
946 | essentialCube = bdd_find_essential_cube(from); |
---|
947 | |
---|
948 | if (!bdd_is_tautology(essentialCube, 1)) { |
---|
949 | info->averageFoundEssential = (info->averageFoundEssential * |
---|
950 | (float)info->nFoundEssentials + (float)(bdd_size(essentialCube) - 1)) / |
---|
951 | (float)(info->nFoundEssentials + 1); |
---|
952 | info->averageFoundEssentialDepth = (info->averageFoundEssentialDepth * |
---|
953 | (float)info->nFoundEssentials + (float)depth) / |
---|
954 | (float)(info->nFoundEssentials + 1); |
---|
955 | if (info->nFoundEssentials == 0 || depth < info->topFoundEssentialDepth) |
---|
956 | info->topFoundEssentialDepth = depth; |
---|
957 | if (info->option->printEssential && depth < IMG_TF_MAX_PRINT_DEPTH) |
---|
958 | info->foundEssentials[depth]++; |
---|
959 | info->nFoundEssentials++; |
---|
960 | if (vector) { |
---|
961 | array_t *tmpVector; |
---|
962 | if (info->option->preCanonical) { |
---|
963 | tmpFrom = PreImageMakeRelationCanonical(info, vector, from, |
---|
964 | relationArray, &newVector, |
---|
965 | &newRelationArray); |
---|
966 | } else { |
---|
967 | tmpFrom = from; |
---|
968 | newVector = vector; |
---|
969 | newRelationArray = relationArray; |
---|
970 | } |
---|
971 | tmpVector = newVector; |
---|
972 | newFrom = ImgVectorMinimize(info, tmpVector, essentialCube, tmpFrom, |
---|
973 | newRelationArray, &newVector, NIL(mdd_t *), |
---|
974 | NIL(array_t *), NIL(mdd_t *), NIL(mdd_t *)); |
---|
975 | if (tmpVector != vector) |
---|
976 | ImgVectorFree(tmpVector); |
---|
977 | if (tmpFrom != from) |
---|
978 | mdd_free(tmpFrom); |
---|
979 | } else { |
---|
980 | tmpRelationArray = ImgGetCofactoredRelationArray(relationArray, |
---|
981 | essentialCube); |
---|
982 | if (info->option->preCanonical) { |
---|
983 | newFrom = PreImageMakeRelationCanonical(info, vector, from, |
---|
984 | tmpRelationArray, &newVector, |
---|
985 | &newRelationArray); |
---|
986 | mdd_array_free(tmpRelationArray); |
---|
987 | } else { |
---|
988 | newFrom = from; |
---|
989 | newVector = vector; |
---|
990 | newRelationArray = tmpRelationArray; |
---|
991 | } |
---|
992 | } |
---|
993 | foundEssentialDepth = depth; |
---|
994 | } else { |
---|
995 | if (info->option->preCanonical) { |
---|
996 | newFrom = PreImageMakeRelationCanonical(info, vector, from, |
---|
997 | relationArray, |
---|
998 | &newVector, &newRelationArray); |
---|
999 | } else { |
---|
1000 | newFrom = from; |
---|
1001 | newVector = vector; |
---|
1002 | newRelationArray = relationArray; |
---|
1003 | } |
---|
1004 | foundEssentialDepth = info->option->maxEssentialDepth; |
---|
1005 | } |
---|
1006 | mdd_free(essentialCube); |
---|
1007 | foundEssentialDepthT = info->option->maxEssentialDepth; |
---|
1008 | foundEssentialDepthE = info->option->maxEssentialDepth; |
---|
1009 | } else { |
---|
1010 | if (info->option->preCanonical) { |
---|
1011 | newFrom = PreImageMakeRelationCanonical(info, vector, from, relationArray, |
---|
1012 | &newVector, &newRelationArray); |
---|
1013 | } else { |
---|
1014 | newFrom = from; |
---|
1015 | newVector = vector; |
---|
1016 | newRelationArray = relationArray; |
---|
1017 | } |
---|
1018 | /* To remove compiler warnings */ |
---|
1019 | foundEssentialDepth = -1; |
---|
1020 | foundEssentialDepthT = -1; |
---|
1021 | foundEssentialDepthE = -1; |
---|
1022 | } |
---|
1023 | |
---|
1024 | if (info->option->debug) { |
---|
1025 | refResult = ImgPreImageByHybridWithStaticSplit(info, vector, from, |
---|
1026 | relationArray, |
---|
1027 | NIL(mdd_t), NIL(mdd_t)); |
---|
1028 | res = ImgPreImageByHybridWithStaticSplit(info, newVector, newFrom, |
---|
1029 | newRelationArray, |
---|
1030 | NIL(mdd_t), NIL(mdd_t)); |
---|
1031 | tmp = refResult; |
---|
1032 | refResult = mdd_and(tmp, info->debugCareSet, 1, 1); |
---|
1033 | mdd_free(tmp); |
---|
1034 | tmp = res; |
---|
1035 | res = mdd_and(tmp, info->debugCareSet, 1, 1); |
---|
1036 | mdd_free(tmp); |
---|
1037 | assert(mdd_equal_mod_care_set_array(refResult, res, info->toCareSetArray)); |
---|
1038 | mdd_free(refResult); |
---|
1039 | mdd_free(res); |
---|
1040 | } |
---|
1041 | |
---|
1042 | if (bdd_is_tautology(newFrom, 1)) { |
---|
1043 | if (newVector && newVector != vector) |
---|
1044 | ImgVectorFree(newVector); |
---|
1045 | if (newRelationArray != relationArray) |
---|
1046 | mdd_array_free(newRelationArray); |
---|
1047 | if (newFrom != from) |
---|
1048 | mdd_free(newFrom); |
---|
1049 | info->averageDepthB = (info->averageDepthB * (float)info->nLeavesB + |
---|
1050 | (float)depth) / (float)(info->nLeavesB + 1); |
---|
1051 | if (depth > info->maxDepthB) |
---|
1052 | info->maxDepthB = depth; |
---|
1053 | info->nLeavesB++; |
---|
1054 | if (findEssential) |
---|
1055 | info->foundEssentialDepth = foundEssentialDepth; |
---|
1056 | return(mdd_one(info->manager)); |
---|
1057 | } |
---|
1058 | |
---|
1059 | if (depth == turnDepth || |
---|
1060 | (info->option->splitCubeFunc && bdd_is_cube(newFrom))) { |
---|
1061 | res = ImgPreImageByHybridWithStaticSplit(info, newVector, newFrom, |
---|
1062 | newRelationArray, |
---|
1063 | NIL(mdd_t), NIL(mdd_t)); |
---|
1064 | if (newVector && newVector != vector) |
---|
1065 | ImgVectorFree(newVector); |
---|
1066 | if (newRelationArray != relationArray) |
---|
1067 | mdd_array_free(newRelationArray); |
---|
1068 | if (newFrom != from) |
---|
1069 | mdd_free(newFrom); |
---|
1070 | info->averageDepthB = (info->averageDepthB * (float)info->nLeavesB + |
---|
1071 | (float)depth) / (float)(info->nLeavesB + 1); |
---|
1072 | if (depth > info->maxDepthB) |
---|
1073 | info->maxDepthB = depth; |
---|
1074 | info->nLeavesB++; |
---|
1075 | if (findEssential) |
---|
1076 | info->foundEssentialDepth = foundEssentialDepth; |
---|
1077 | return(res); |
---|
1078 | } |
---|
1079 | |
---|
1080 | var = ImgChooseTrSplitVar(info, newVector, newRelationArray, |
---|
1081 | info->option->trSplitMethod, 0); |
---|
1082 | if (!var) { |
---|
1083 | res = ImgPreImageByHybridWithStaticSplit(info, newVector, newFrom, |
---|
1084 | newRelationArray, |
---|
1085 | NIL(mdd_t), NIL(mdd_t)); |
---|
1086 | if (newVector && newVector != vector) |
---|
1087 | ImgVectorFree(newVector); |
---|
1088 | if (newRelationArray != relationArray) |
---|
1089 | mdd_array_free(newRelationArray); |
---|
1090 | if (newFrom != from) |
---|
1091 | mdd_free(newFrom); |
---|
1092 | info->averageDepthB = (info->averageDepthB * (float)info->nLeavesB + |
---|
1093 | (float)depth) / (float)(info->nLeavesB + 1); |
---|
1094 | if (depth > info->maxDepthB) |
---|
1095 | info->maxDepthB = depth; |
---|
1096 | info->nLeavesB++; |
---|
1097 | if (findEssential) |
---|
1098 | info->foundEssentialDepth = foundEssentialDepth; |
---|
1099 | return(res); |
---|
1100 | } |
---|
1101 | |
---|
1102 | varNot = mdd_not(var); |
---|
1103 | |
---|
1104 | nRecur = 0; |
---|
1105 | if (newVector) { |
---|
1106 | ImgVectorConstrain(info, newVector, var, NIL(array_t), |
---|
1107 | &vectorT, &cubeT, NIL(array_t *), |
---|
1108 | NIL(mdd_t *), NIL(mdd_t *), TRUE); |
---|
1109 | fromT = bdd_cofactor(newFrom, cubeT); |
---|
1110 | mdd_free(cubeT); |
---|
1111 | } else { |
---|
1112 | vectorT = NIL(array_t); |
---|
1113 | fromT = mdd_dup(newFrom); |
---|
1114 | } |
---|
1115 | relationArrayT = ImgGetCofactoredRelationArray(newRelationArray, var); |
---|
1116 | if (bdd_is_tautology(fromT, 1)) { |
---|
1117 | resT = mdd_one(info->manager); |
---|
1118 | if (vectorT) |
---|
1119 | ImgVectorFree(vectorT); |
---|
1120 | } else if (bdd_is_tautology(fromT, 0)) { |
---|
1121 | resT = mdd_zero(info->manager); |
---|
1122 | if (vectorT) |
---|
1123 | ImgVectorFree(vectorT); |
---|
1124 | } else { |
---|
1125 | if (info->option->debug) { |
---|
1126 | saveCareSet = info->debugCareSet; |
---|
1127 | info->debugCareSet = mdd_and(saveCareSet, var, 1, 1); |
---|
1128 | } |
---|
1129 | resT = PreImageByStaticDomainCofactoring(info, vectorT, fromT, |
---|
1130 | relationArrayT, turnDepth, depth + 1); |
---|
1131 | if (info->option->debug) { |
---|
1132 | mdd_free(info->debugCareSet); |
---|
1133 | info->debugCareSet = saveCareSet; |
---|
1134 | } |
---|
1135 | if (findEssential) |
---|
1136 | foundEssentialDepthE = info->foundEssentialDepth; |
---|
1137 | if (vectorT) |
---|
1138 | ImgVectorFree(vectorT); |
---|
1139 | nRecur++; |
---|
1140 | } |
---|
1141 | mdd_free(fromT); |
---|
1142 | mdd_array_free(relationArrayT); |
---|
1143 | |
---|
1144 | if (newVector) { |
---|
1145 | ImgVectorConstrain(info, newVector, varNot, NIL(array_t), |
---|
1146 | &vectorE, &cubeE, NIL(array_t *), |
---|
1147 | NIL(mdd_t *), NIL(mdd_t *), TRUE); |
---|
1148 | if (newVector != vector) |
---|
1149 | ImgVectorFree(newVector); |
---|
1150 | fromE = bdd_cofactor(newFrom, cubeE); |
---|
1151 | mdd_free(cubeE); |
---|
1152 | } else { |
---|
1153 | vectorE = NIL(array_t); |
---|
1154 | fromE = mdd_dup(newFrom); |
---|
1155 | } |
---|
1156 | if (newFrom != from) |
---|
1157 | mdd_free(newFrom); |
---|
1158 | relationArrayE = ImgGetCofactoredRelationArray(newRelationArray, varNot); |
---|
1159 | if (newRelationArray != relationArray) |
---|
1160 | mdd_array_free(newRelationArray); |
---|
1161 | if (bdd_is_tautology(fromE, 1)) { |
---|
1162 | resE = mdd_one(info->manager); |
---|
1163 | if (vectorE) |
---|
1164 | ImgVectorFree(vectorE); |
---|
1165 | } else if (bdd_is_tautology(fromE, 0)) { |
---|
1166 | resE = mdd_zero(info->manager); |
---|
1167 | if (vectorE) |
---|
1168 | ImgVectorFree(vectorE); |
---|
1169 | } else { |
---|
1170 | if (info->option->debug) { |
---|
1171 | saveCareSet = info->debugCareSet; |
---|
1172 | info->debugCareSet = mdd_and(saveCareSet, var, 1, 0); |
---|
1173 | } |
---|
1174 | resE = PreImageByStaticDomainCofactoring(info, vectorE, fromE, |
---|
1175 | relationArrayE, turnDepth, depth + 1); |
---|
1176 | if (info->option->debug) { |
---|
1177 | mdd_free(info->debugCareSet); |
---|
1178 | info->debugCareSet = saveCareSet; |
---|
1179 | } |
---|
1180 | if (findEssential) |
---|
1181 | foundEssentialDepthE = info->foundEssentialDepth; |
---|
1182 | if (vectorE) |
---|
1183 | ImgVectorFree(vectorE); |
---|
1184 | nRecur++; |
---|
1185 | } |
---|
1186 | mdd_free(fromE); |
---|
1187 | mdd_array_free(relationArrayE); |
---|
1188 | |
---|
1189 | res = bdd_ite(var, resT, resE, 1, 1, 1); |
---|
1190 | if (info->option->verbosity) { |
---|
1191 | size = bdd_size(res); |
---|
1192 | if (size > info->maxIntermediateSize) |
---|
1193 | info->maxIntermediateSize = size; |
---|
1194 | if (info->option->printBddSize) { |
---|
1195 | fprintf(vis_stdout, "** tfm info: bdd_ite(2,%d,%d) = %d\n", |
---|
1196 | bdd_size(resT), bdd_size(resE), bdd_size(res)); |
---|
1197 | } |
---|
1198 | } |
---|
1199 | mdd_free(resT); |
---|
1200 | mdd_free(resE); |
---|
1201 | mdd_free(var); |
---|
1202 | mdd_free(varNot); |
---|
1203 | |
---|
1204 | if (info->option->debug) { |
---|
1205 | refResult = ImgPreImageByHybridWithStaticSplit(info, vector, from, |
---|
1206 | relationArray, |
---|
1207 | NIL(mdd_t), NIL(mdd_t)); |
---|
1208 | tmp = refResult; |
---|
1209 | refResult = mdd_and(tmp, info->debugCareSet, 1, 1); |
---|
1210 | mdd_free(tmp); |
---|
1211 | tmp = mdd_and(res, info->debugCareSet, 1, 1); |
---|
1212 | assert(mdd_equal_mod_care_set_array(refResult, tmp, info->toCareSetArray)); |
---|
1213 | mdd_free(refResult); |
---|
1214 | mdd_free(tmp); |
---|
1215 | } |
---|
1216 | |
---|
1217 | if (nRecur == 0) { |
---|
1218 | info->averageDepthB = (info->averageDepthB * (float)info->nLeavesB + |
---|
1219 | (float)depth) / (float)(info->nLeavesB + 1); |
---|
1220 | if (depth > info->maxDepthB) |
---|
1221 | info->maxDepthB = depth; |
---|
1222 | info->nLeavesB++; |
---|
1223 | } |
---|
1224 | |
---|
1225 | if (findEssential) { |
---|
1226 | if (foundEssentialDepth == info->option->maxEssentialDepth) { |
---|
1227 | if (foundEssentialDepthT < foundEssentialDepthE) |
---|
1228 | foundEssentialDepth = foundEssentialDepthT; |
---|
1229 | else |
---|
1230 | foundEssentialDepth = foundEssentialDepthE; |
---|
1231 | } |
---|
1232 | info->foundEssentialDepth = foundEssentialDepth; |
---|
1233 | } |
---|
1234 | return(res); |
---|
1235 | } |
---|
1236 | |
---|
1237 | |
---|
1238 | /**Function******************************************************************** |
---|
1239 | |
---|
1240 | Synopsis [Computes preimage with constraint cofactoring method.] |
---|
1241 | |
---|
1242 | Description [Computes preimage with constraint cofactoring method.] |
---|
1243 | |
---|
1244 | SideEffects [] |
---|
1245 | |
---|
1246 | ******************************************************************************/ |
---|
1247 | static bdd_t * |
---|
1248 | PreImageByConstraintCofactoring(ImgTfmInfo_t *info, array_t *delta, |
---|
1249 | bdd_t *image, int splitMethod, |
---|
1250 | int turnDepth, int depth) |
---|
1251 | { |
---|
1252 | array_t *newDelta, *tmpDelta, *vector; |
---|
1253 | bdd_t *preImg, *preImgT, *preImgE, *imgT, *imgE; |
---|
1254 | bdd_t *c, *newImg, *tmpImg; |
---|
1255 | int split; |
---|
1256 | bdd_t *var, *varNot, *refResult; |
---|
1257 | ImgComponent_t *comp; |
---|
1258 | int nRecur, size; |
---|
1259 | mdd_t *essentialCube; |
---|
1260 | int findEssential; |
---|
1261 | int foundEssentialDepth; |
---|
1262 | int foundEssentialDepthT, foundEssentialDepthE; |
---|
1263 | mdd_t *saveCareSet = NIL(mdd_t), *tmp; |
---|
1264 | |
---|
1265 | info->nRecursionB++; |
---|
1266 | |
---|
1267 | if (info->nIntermediateVars) |
---|
1268 | size = ImgVectorFunctionSize(delta); |
---|
1269 | else |
---|
1270 | size = array_n(delta); |
---|
1271 | if (size == 1) { |
---|
1272 | preImg = PreImageBySubstitution(info, delta, image); |
---|
1273 | info->averageDepthB = (info->averageDepthB * (float)info->nLeavesB + |
---|
1274 | (float)depth) / (float)(info->nLeavesB + 1); |
---|
1275 | if (depth > info->maxDepthB) |
---|
1276 | info->maxDepthB = depth; |
---|
1277 | info->nLeavesB++; |
---|
1278 | info->foundEssentialDepth = info->option->maxEssentialDepth; |
---|
1279 | return(preImg); |
---|
1280 | } |
---|
1281 | |
---|
1282 | if (info->option->findEssential) { |
---|
1283 | if (info->option->findEssential == 1) |
---|
1284 | findEssential = 1; |
---|
1285 | else { |
---|
1286 | if (depth >= info->lastFoundEssentialDepth) |
---|
1287 | findEssential = 1; |
---|
1288 | else |
---|
1289 | findEssential = 0; |
---|
1290 | } |
---|
1291 | } else |
---|
1292 | findEssential = 0; |
---|
1293 | if (findEssential) { |
---|
1294 | essentialCube = bdd_find_essential_cube(image); |
---|
1295 | |
---|
1296 | if (!bdd_is_tautology(essentialCube, 1)) { |
---|
1297 | info->averageFoundEssential = (info->averageFoundEssential * |
---|
1298 | (float)info->nFoundEssentials + (float)(bdd_size(essentialCube) - 1)) / |
---|
1299 | (float)(info->nFoundEssentials + 1); |
---|
1300 | info->averageFoundEssentialDepth = (info->averageFoundEssentialDepth * |
---|
1301 | (float)info->nFoundEssentials + (float)depth) / |
---|
1302 | (float)(info->nFoundEssentials + 1); |
---|
1303 | if (info->nFoundEssentials == 0 || depth < info->topFoundEssentialDepth) |
---|
1304 | info->topFoundEssentialDepth = depth; |
---|
1305 | if (info->option->printEssential && depth < IMG_TF_MAX_PRINT_DEPTH) |
---|
1306 | info->foundEssentials[depth]++; |
---|
1307 | info->nFoundEssentials++; |
---|
1308 | tmpImg = ImgVectorMinimize(info, delta, essentialCube, image, |
---|
1309 | NIL(array_t), &tmpDelta, NIL(mdd_t *), |
---|
1310 | NIL(array_t *), NIL(mdd_t *), NIL(mdd_t *)); |
---|
1311 | foundEssentialDepth = depth; |
---|
1312 | } else { |
---|
1313 | tmpDelta = delta; |
---|
1314 | tmpImg = image; |
---|
1315 | foundEssentialDepth = info->option->maxEssentialDepth; |
---|
1316 | } |
---|
1317 | mdd_free(essentialCube); |
---|
1318 | foundEssentialDepthT = info->option->maxEssentialDepth; |
---|
1319 | foundEssentialDepthE = info->option->maxEssentialDepth; |
---|
1320 | } else { |
---|
1321 | tmpDelta = delta; |
---|
1322 | tmpImg = image; |
---|
1323 | /* To remove compiler warnings */ |
---|
1324 | foundEssentialDepth = -1; |
---|
1325 | foundEssentialDepthT = -1; |
---|
1326 | foundEssentialDepthE = -1; |
---|
1327 | } |
---|
1328 | |
---|
1329 | if (info->option->preCanonical) { |
---|
1330 | newImg = PreImageMakeVectorCanonical(info, tmpDelta, tmpImg, NIL(array_t), |
---|
1331 | &newDelta, NIL(array_t *), NIL(mdd_t *), |
---|
1332 | NIL(mdd_t *)); |
---|
1333 | } else { |
---|
1334 | newImg = tmpImg; |
---|
1335 | newDelta = tmpDelta; |
---|
1336 | } |
---|
1337 | if (tmpDelta != delta) |
---|
1338 | ImgVectorFree(tmpDelta); |
---|
1339 | if (tmpImg != image) |
---|
1340 | mdd_free(tmpImg); |
---|
1341 | |
---|
1342 | if (bdd_is_tautology(newImg, 1) || bdd_is_tautology(newImg, 0)) { |
---|
1343 | info->averageDepthB = (info->averageDepthB * (float)info->nLeavesB + |
---|
1344 | (float)depth) / (float)(info->nLeavesB + 1); |
---|
1345 | if (depth > info->maxDepthB) |
---|
1346 | info->maxDepthB = depth; |
---|
1347 | info->nLeavesB++; |
---|
1348 | if (info->option->debug) { |
---|
1349 | refResult = ImgPreImageByHybrid(info, newDelta, newImg); |
---|
1350 | tmp = refResult; |
---|
1351 | refResult = mdd_and(tmp, info->debugCareSet, 1, 1); |
---|
1352 | mdd_free(tmp); |
---|
1353 | tmp = mdd_and(newImg, info->debugCareSet, 1, 1); |
---|
1354 | assert(mdd_equal_mod_care_set_array(refResult, tmp, |
---|
1355 | info->toCareSetArray)); |
---|
1356 | mdd_free(refResult); |
---|
1357 | mdd_free(tmp); |
---|
1358 | } |
---|
1359 | ImgVectorFree(newDelta); |
---|
1360 | if (findEssential) |
---|
1361 | info->foundEssentialDepth = foundEssentialDepth; |
---|
1362 | return(newImg); |
---|
1363 | } |
---|
1364 | |
---|
1365 | if (info->preCache) { |
---|
1366 | preImg = ImgCacheLookupTable(info, info->preCache, newDelta, newImg); |
---|
1367 | if (preImg) { |
---|
1368 | info->averageDepthB = (info->averageDepthB * (float)info->nLeavesB + |
---|
1369 | (float)depth) / (float)(info->nLeavesB + 1); |
---|
1370 | if (depth > info->maxDepthB) |
---|
1371 | info->maxDepthB = depth; |
---|
1372 | info->nLeavesB++; |
---|
1373 | if (info->option->debug) { |
---|
1374 | refResult = ImgPreImageByHybrid(info, newDelta, newImg); |
---|
1375 | tmp = refResult; |
---|
1376 | refResult = mdd_and(tmp, info->debugCareSet, 1, 1); |
---|
1377 | mdd_free(tmp); |
---|
1378 | tmp = mdd_and(preImg, info->debugCareSet, 1, 1); |
---|
1379 | assert(mdd_equal_mod_care_set_array(refResult, tmp, |
---|
1380 | info->toCareSetArray)); |
---|
1381 | mdd_free(refResult); |
---|
1382 | mdd_free(tmp); |
---|
1383 | } |
---|
1384 | ImgVectorFree(newDelta); |
---|
1385 | mdd_free(newImg); |
---|
1386 | if (findEssential) |
---|
1387 | info->foundEssentialDepth = foundEssentialDepth; |
---|
1388 | return(preImg); |
---|
1389 | } |
---|
1390 | } |
---|
1391 | |
---|
1392 | if (depth == turnDepth) { |
---|
1393 | preImg = ImgPreImageByHybrid(info, newDelta, newImg); |
---|
1394 | if (info->option->debug) { |
---|
1395 | refResult = ImgPreImageByHybrid(info, newDelta, newImg); |
---|
1396 | tmp = refResult; |
---|
1397 | refResult = mdd_and(tmp, info->debugCareSet, 1, 1); |
---|
1398 | mdd_free(tmp); |
---|
1399 | tmp = mdd_and(preImg, info->debugCareSet, 1, 1); |
---|
1400 | assert(mdd_equal_mod_care_set_array(refResult, tmp, |
---|
1401 | info->toCareSetArray)); |
---|
1402 | mdd_free(refResult); |
---|
1403 | mdd_free(tmp); |
---|
1404 | } |
---|
1405 | if (info->preCache) |
---|
1406 | ImgCacheInsertTable(info->preCache, newDelta, newImg, mdd_dup(preImg)); |
---|
1407 | else { |
---|
1408 | ImgVectorFree(newDelta); |
---|
1409 | mdd_free(newImg); |
---|
1410 | } |
---|
1411 | info->averageDepthB = (info->averageDepthB * (float)info->nLeavesB + |
---|
1412 | (float)depth) / (float)(info->nLeavesB + 1); |
---|
1413 | if (depth > info->maxDepthB) |
---|
1414 | info->maxDepthB = depth; |
---|
1415 | info->nLeavesB++; |
---|
1416 | info->nTurnsB++; |
---|
1417 | if (findEssential) |
---|
1418 | info->foundEssentialDepth = foundEssentialDepth; |
---|
1419 | return(preImg); |
---|
1420 | } |
---|
1421 | |
---|
1422 | split = PreImageChooseSplitVar(info, newDelta, newImg, |
---|
1423 | 1, info->option->preOutputSplit); |
---|
1424 | comp = array_fetch(ImgComponent_t *, newDelta, split); |
---|
1425 | var = mdd_dup(comp->var); |
---|
1426 | varNot = mdd_not(var); |
---|
1427 | imgE = bdd_cofactor(newImg, varNot); |
---|
1428 | mdd_free(varNot); |
---|
1429 | imgT = bdd_cofactor(newImg, var); |
---|
1430 | mdd_free(var); |
---|
1431 | if (!info->preCache && !info->option->debug) |
---|
1432 | mdd_free(newImg); |
---|
1433 | c = PreImageDeleteOneComponent(info, newDelta, split, &vector); |
---|
1434 | if (!info->preCache && !info->option->debug) |
---|
1435 | ImgVectorFree(newDelta); |
---|
1436 | |
---|
1437 | nRecur = 0; |
---|
1438 | if (bdd_is_tautology(imgT, 1)) |
---|
1439 | preImgT = mdd_one(info->manager); |
---|
1440 | else if (bdd_is_tautology(imgT, 0)) |
---|
1441 | preImgT = mdd_zero(info->manager); |
---|
1442 | else { |
---|
1443 | if (info->option->debug) { |
---|
1444 | saveCareSet = info->debugCareSet; |
---|
1445 | info->debugCareSet = mdd_and(saveCareSet, c, 1, 1); |
---|
1446 | } |
---|
1447 | preImgT = PreImageByConstraintCofactoring(info, vector, imgT, splitMethod, |
---|
1448 | turnDepth, depth + 1); |
---|
1449 | if (info->option->debug) { |
---|
1450 | mdd_free(info->debugCareSet); |
---|
1451 | info->debugCareSet = saveCareSet; |
---|
1452 | } |
---|
1453 | if (findEssential) |
---|
1454 | foundEssentialDepthT = info->foundEssentialDepth; |
---|
1455 | nRecur++; |
---|
1456 | } |
---|
1457 | mdd_free(imgT); |
---|
1458 | if (bdd_is_tautology(imgE, 1)) |
---|
1459 | preImgE = mdd_one(info->manager); |
---|
1460 | else if (bdd_is_tautology(imgE, 0)) |
---|
1461 | preImgE = mdd_zero(info->manager); |
---|
1462 | else { |
---|
1463 | if (info->option->debug) { |
---|
1464 | saveCareSet = info->debugCareSet; |
---|
1465 | info->debugCareSet = mdd_and(saveCareSet, c, 1, 0); |
---|
1466 | } |
---|
1467 | preImgE = PreImageByConstraintCofactoring(info, vector, imgE, splitMethod, |
---|
1468 | turnDepth, depth + 1); |
---|
1469 | if (info->option->debug) { |
---|
1470 | mdd_free(info->debugCareSet); |
---|
1471 | info->debugCareSet = saveCareSet; |
---|
1472 | } |
---|
1473 | if (findEssential) |
---|
1474 | foundEssentialDepthE = info->foundEssentialDepth; |
---|
1475 | nRecur++; |
---|
1476 | } |
---|
1477 | mdd_free(imgE); |
---|
1478 | ImgVectorFree(vector); |
---|
1479 | preImg = bdd_ite(c, preImgT, preImgE, 1, 1, 1); |
---|
1480 | if (info->option->verbosity) { |
---|
1481 | size = bdd_size(preImg); |
---|
1482 | if (size > info->maxIntermediateSize) |
---|
1483 | info->maxIntermediateSize = size; |
---|
1484 | if (info->option->printBddSize) { |
---|
1485 | fprintf(vis_stdout, "** tfm info: bdd_ite(%d,%d,%d) = %d\n", |
---|
1486 | bdd_size(c), bdd_size(preImgT), bdd_size(preImgE), |
---|
1487 | bdd_size(preImg)); |
---|
1488 | } |
---|
1489 | } |
---|
1490 | mdd_free(c); |
---|
1491 | mdd_free(preImgT); |
---|
1492 | mdd_free(preImgE); |
---|
1493 | |
---|
1494 | if (info->preCache) |
---|
1495 | ImgCacheInsertTable(info->preCache, newDelta, newImg, mdd_dup(preImg)); |
---|
1496 | |
---|
1497 | if (info->option->debug) { |
---|
1498 | refResult = ImgPreImageByHybrid(info, newDelta, newImg); |
---|
1499 | tmp = refResult; |
---|
1500 | refResult = mdd_and(tmp, info->debugCareSet, 1, 1); |
---|
1501 | mdd_free(tmp); |
---|
1502 | tmp = mdd_and(preImg, info->debugCareSet, 1, 1); |
---|
1503 | assert(mdd_equal_mod_care_set_array(refResult, tmp, |
---|
1504 | info->toCareSetArray)); |
---|
1505 | mdd_free(refResult); |
---|
1506 | mdd_free(tmp); |
---|
1507 | if (!info->preCache) { |
---|
1508 | ImgVectorFree(newDelta); |
---|
1509 | mdd_free(newImg); |
---|
1510 | } |
---|
1511 | } |
---|
1512 | |
---|
1513 | if (nRecur == 0) { |
---|
1514 | info->averageDepthB = (info->averageDepthB * (float)info->nLeavesB + |
---|
1515 | (float)depth) / (float)(info->nLeavesB + 1); |
---|
1516 | if (depth > info->maxDepthB) |
---|
1517 | info->maxDepthB = depth; |
---|
1518 | info->nLeavesB++; |
---|
1519 | } |
---|
1520 | |
---|
1521 | if (findEssential) { |
---|
1522 | if (foundEssentialDepth == info->option->maxEssentialDepth) { |
---|
1523 | if (foundEssentialDepthT < foundEssentialDepthE) |
---|
1524 | foundEssentialDepth = foundEssentialDepthT; |
---|
1525 | else |
---|
1526 | foundEssentialDepth = foundEssentialDepthE; |
---|
1527 | } |
---|
1528 | info->foundEssentialDepth = foundEssentialDepth; |
---|
1529 | } |
---|
1530 | return(preImg); |
---|
1531 | } |
---|
1532 | |
---|
1533 | |
---|
1534 | /**Function******************************************************************** |
---|
1535 | |
---|
1536 | Synopsis [Computes a preimage by Filkorn's substitution.] |
---|
1537 | |
---|
1538 | Description [Computes a preimage by Filkorn's substitution.] |
---|
1539 | |
---|
1540 | SideEffects [] |
---|
1541 | |
---|
1542 | ******************************************************************************/ |
---|
1543 | static mdd_t * |
---|
1544 | PreImageBySubstitution(ImgTfmInfo_t *info, array_t *vector, mdd_t *from) |
---|
1545 | { |
---|
1546 | int i, index; |
---|
1547 | ImgComponent_t *comp, *fromComp; |
---|
1548 | array_t *varArray, *funcArray; |
---|
1549 | mdd_t *result; |
---|
1550 | |
---|
1551 | if (bdd_is_tautology(from, 1)) |
---|
1552 | return(mdd_one(info->manager)); |
---|
1553 | else if (bdd_is_tautology(from, 0)) |
---|
1554 | return(mdd_zero(info->manager)); |
---|
1555 | |
---|
1556 | fromComp = ImgComponentAlloc(info); |
---|
1557 | fromComp->func = from; |
---|
1558 | ImgComponentGetSupport(fromComp); |
---|
1559 | |
---|
1560 | varArray = array_alloc(mdd_t *, 0); |
---|
1561 | funcArray = array_alloc(mdd_t *, 0); |
---|
1562 | |
---|
1563 | for (i = 0; i < array_n(vector); i++) { |
---|
1564 | comp = array_fetch(ImgComponent_t *, vector, i); |
---|
1565 | index = bdd_top_var_id(comp->var); |
---|
1566 | if (fromComp->support[index] || comp->intermediate) { |
---|
1567 | array_insert_last(mdd_t *, varArray, comp->var); |
---|
1568 | array_insert_last(mdd_t *, funcArray, comp->func); |
---|
1569 | } |
---|
1570 | } |
---|
1571 | |
---|
1572 | fromComp->func = NIL(mdd_t); |
---|
1573 | ImgComponentFree(fromComp); |
---|
1574 | |
---|
1575 | result = bdd_vector_compose(from, varArray, funcArray); |
---|
1576 | array_free(varArray); |
---|
1577 | array_free(funcArray); |
---|
1578 | |
---|
1579 | /* quantify all primary inputs */ |
---|
1580 | if (info->preKeepPiInTr == FALSE) { |
---|
1581 | array_t *quantifyVarBddArray; |
---|
1582 | mdd_t *tmp; |
---|
1583 | |
---|
1584 | if (info->newQuantifyBddVars) |
---|
1585 | quantifyVarBddArray = info->newQuantifyBddVars; |
---|
1586 | else |
---|
1587 | quantifyVarBddArray = info->quantifyVarBddArray; |
---|
1588 | |
---|
1589 | tmp = result; |
---|
1590 | result = bdd_smooth(tmp, quantifyVarBddArray); |
---|
1591 | mdd_free(tmp); |
---|
1592 | } |
---|
1593 | |
---|
1594 | return(result); |
---|
1595 | } |
---|
1596 | |
---|
1597 | |
---|
1598 | /**Function******************************************************************** |
---|
1599 | |
---|
1600 | Synopsis [Makes a vector canonical for preimage.] |
---|
1601 | |
---|
1602 | Description [Makes a vector canonical for preimage. |
---|
1603 | Delete all the components which doesn't appear as a support |
---|
1604 | in the image. If a component is constant, simplify the image with the |
---|
1605 | constant value and delete the corresponding component from delta |
---|
1606 | Side effect on delta. Return new image.] |
---|
1607 | |
---|
1608 | SideEffects [] |
---|
1609 | |
---|
1610 | ******************************************************************************/ |
---|
1611 | static bdd_t * |
---|
1612 | PreImageMakeVectorCanonical(ImgTfmInfo_t *info, array_t *vector, bdd_t *image, |
---|
1613 | array_t *relationArray, array_t **newVector, |
---|
1614 | array_t **newRelationArray, |
---|
1615 | mdd_t **cofactorCube, mdd_t **abstractCube) |
---|
1616 | { |
---|
1617 | array_t *tmpVector, *cofactoredVector; |
---|
1618 | bdd_t *simple, *tmp, *newImage; |
---|
1619 | ImgComponent_t *comp, *comp1, *imgComp; |
---|
1620 | int i, id, n, pos; |
---|
1621 | st_table *equivTable; |
---|
1622 | int *ptr, *regularPtr; |
---|
1623 | mdd_t *var, *cofactor, *abstract, *nsVar; |
---|
1624 | array_t *tmpRelationArray; |
---|
1625 | int changed = 0; |
---|
1626 | |
---|
1627 | newImage = mdd_dup(image); |
---|
1628 | |
---|
1629 | imgComp = ImgComponentAlloc(info); |
---|
1630 | imgComp->func = image; |
---|
1631 | ImgComponentGetSupport(imgComp); |
---|
1632 | |
---|
1633 | if (relationArray) { |
---|
1634 | cofactor = mdd_one(info->manager); |
---|
1635 | abstract = mdd_one(info->manager); |
---|
1636 | } else { |
---|
1637 | cofactor = NIL(mdd_t); |
---|
1638 | abstract = NIL(mdd_t); |
---|
1639 | } |
---|
1640 | |
---|
1641 | if (info->nIntermediateVars) { |
---|
1642 | mdd_t *tmpCofactor, *tmpAbstract; |
---|
1643 | mdd_t *constIntermediate; |
---|
1644 | |
---|
1645 | if (ImgExistConstIntermediateVar(vector)) { |
---|
1646 | constIntermediate = mdd_one(info->manager); |
---|
1647 | for (i = 0; i < array_n(vector); i++) { |
---|
1648 | comp = array_fetch(ImgComponent_t *, vector, i); |
---|
1649 | if (comp->intermediate) { |
---|
1650 | if (mdd_is_tautology(comp->func, 1)) { |
---|
1651 | tmp = constIntermediate; |
---|
1652 | constIntermediate = mdd_and(tmp, comp->var, 1, 1); |
---|
1653 | mdd_free(tmp); |
---|
1654 | } else if (mdd_is_tautology(comp->func, 0)) { |
---|
1655 | tmp = constIntermediate; |
---|
1656 | constIntermediate = mdd_and(tmp, comp->var, 1, 0); |
---|
1657 | mdd_free(tmp); |
---|
1658 | } |
---|
1659 | } |
---|
1660 | } |
---|
1661 | if (relationArray) { |
---|
1662 | cofactoredVector = ImgComposeConstIntermediateVars(info, vector, |
---|
1663 | constIntermediate, |
---|
1664 | &tmpCofactor, &tmpAbstract, |
---|
1665 | NIL(mdd_t *), &newImage); |
---|
1666 | |
---|
1667 | if (!bdd_is_tautology(tmpCofactor, 1)) { |
---|
1668 | tmp = cofactor; |
---|
1669 | cofactor = mdd_and(tmp, tmpCofactor, 1, 1); |
---|
1670 | mdd_free(tmp); |
---|
1671 | } |
---|
1672 | mdd_free(tmpCofactor); |
---|
1673 | if (!bdd_is_tautology(tmpAbstract, 1)) { |
---|
1674 | tmp = abstract; |
---|
1675 | abstract = mdd_and(tmp, tmpAbstract, 1, 1); |
---|
1676 | mdd_free(tmp); |
---|
1677 | } |
---|
1678 | mdd_free(tmpAbstract); |
---|
1679 | } else { |
---|
1680 | cofactoredVector = ImgComposeConstIntermediateVars(info, vector, |
---|
1681 | constIntermediate, |
---|
1682 | NIL(mdd_t *), NIL(mdd_t *), |
---|
1683 | NIL(mdd_t *), &newImage); |
---|
1684 | } |
---|
1685 | mdd_free(constIntermediate); |
---|
1686 | } else |
---|
1687 | cofactoredVector = vector; |
---|
1688 | } else |
---|
1689 | cofactoredVector = vector; |
---|
1690 | |
---|
1691 | /* Simplify image -- canonicalize the image first */ |
---|
1692 | n = 0; |
---|
1693 | equivTable = st_init_table(st_ptrcmp, st_ptrhash); |
---|
1694 | tmpVector = array_alloc(ImgComponent_t *, 0); |
---|
1695 | for (i = 0; i < array_n(cofactoredVector); i++) { |
---|
1696 | comp = array_fetch(ImgComponent_t *, cofactoredVector, i); |
---|
1697 | if (comp->intermediate) { |
---|
1698 | comp1 = ImgComponentCopy(info, comp); |
---|
1699 | array_insert_last(ImgComponent_t *, tmpVector, comp1); |
---|
1700 | n++; |
---|
1701 | continue; |
---|
1702 | } |
---|
1703 | id = (int)bdd_top_var_id(comp->var); |
---|
1704 | if (!imgComp->support[id]) { |
---|
1705 | if (abstract) { |
---|
1706 | nsVar = ImgSubstitute(comp->var, info->functionData, Img_D2R_c); |
---|
1707 | tmp = abstract; |
---|
1708 | abstract = mdd_and(tmp, nsVar, 1, 1); |
---|
1709 | mdd_free(tmp); |
---|
1710 | mdd_free(nsVar); |
---|
1711 | } |
---|
1712 | continue; |
---|
1713 | } |
---|
1714 | if (mdd_is_tautology(comp->func, 1)) { |
---|
1715 | changed = 1; |
---|
1716 | simple = bdd_cofactor(newImage, comp->var); |
---|
1717 | mdd_free(newImage); |
---|
1718 | newImage = simple; |
---|
1719 | if (abstract) { |
---|
1720 | nsVar = ImgSubstitute(comp->var, info->functionData, Img_D2R_c); |
---|
1721 | tmp = abstract; |
---|
1722 | abstract = mdd_and(tmp, nsVar, 1, 1); |
---|
1723 | mdd_free(tmp); |
---|
1724 | mdd_free(nsVar); |
---|
1725 | } |
---|
1726 | } else if (mdd_is_tautology(comp->func, 0)) { |
---|
1727 | changed = 1; |
---|
1728 | tmp = mdd_not(comp->var); |
---|
1729 | simple = bdd_cofactor(newImage, tmp); |
---|
1730 | mdd_free(tmp); |
---|
1731 | mdd_free(newImage); |
---|
1732 | newImage = simple; |
---|
1733 | if (abstract) { |
---|
1734 | nsVar = ImgSubstitute(comp->var, info->functionData, Img_D2R_c); |
---|
1735 | tmp = abstract; |
---|
1736 | abstract = mdd_and(tmp, nsVar, 1, 1); |
---|
1737 | mdd_free(tmp); |
---|
1738 | mdd_free(nsVar); |
---|
1739 | } |
---|
1740 | } else { |
---|
1741 | ptr = (int *)bdd_pointer(comp->func); |
---|
1742 | regularPtr = (int *)((unsigned long)ptr & ~01); |
---|
1743 | if (st_lookup_int(equivTable, (char *)regularPtr, &pos)) { |
---|
1744 | changed = 1; |
---|
1745 | comp1 = array_fetch(ImgComponent_t *, tmpVector, pos); |
---|
1746 | if (mdd_equal(comp->func, comp1->func)) { |
---|
1747 | tmp = newImage; |
---|
1748 | newImage = bdd_compose(tmp, comp->var, comp1->var); |
---|
1749 | mdd_free(tmp); |
---|
1750 | } else { |
---|
1751 | tmp = newImage; |
---|
1752 | var = mdd_not(comp1->var); |
---|
1753 | newImage = bdd_compose(tmp, comp->var, var); |
---|
1754 | mdd_free(tmp); |
---|
1755 | mdd_free(var); |
---|
1756 | } |
---|
1757 | if (abstract) { |
---|
1758 | nsVar = ImgSubstitute(comp->var, info->functionData, Img_D2R_c); |
---|
1759 | tmp = abstract; |
---|
1760 | abstract = mdd_and(tmp, nsVar, 1, 1); |
---|
1761 | mdd_free(tmp); |
---|
1762 | mdd_free(nsVar); |
---|
1763 | } |
---|
1764 | } else { |
---|
1765 | comp1 = ImgComponentCopy(info, comp); |
---|
1766 | array_insert_last(ImgComponent_t *, tmpVector, comp1); |
---|
1767 | st_insert(equivTable, (char *)regularPtr, (char *)(long)n); |
---|
1768 | n++; |
---|
1769 | } |
---|
1770 | } |
---|
1771 | } |
---|
1772 | st_free_table(equivTable); |
---|
1773 | if (cofactoredVector && cofactoredVector != vector) |
---|
1774 | ImgVectorFree(cofactoredVector); |
---|
1775 | |
---|
1776 | if (changed) { |
---|
1777 | /* Now Simplify delta by deleting the non-affecting components */ |
---|
1778 | *newVector = array_alloc(ImgComponent_t *, 0); |
---|
1779 | |
---|
1780 | imgComp->func = NIL(mdd_t); |
---|
1781 | ImgComponentFree(imgComp); |
---|
1782 | |
---|
1783 | imgComp = ImgComponentAlloc(info); |
---|
1784 | imgComp->func = newImage; |
---|
1785 | ImgSupportClear(info, imgComp->support); |
---|
1786 | ImgComponentGetSupport(imgComp); |
---|
1787 | for (i = 0; i < array_n(tmpVector); i++) { |
---|
1788 | comp = array_fetch(ImgComponent_t *, tmpVector, i); |
---|
1789 | id = (int)bdd_top_var_id(comp->var); |
---|
1790 | if (imgComp->support[id] || comp->intermediate) |
---|
1791 | array_insert_last(ImgComponent_t *, *newVector, comp); |
---|
1792 | else { |
---|
1793 | if (abstract) { |
---|
1794 | nsVar = ImgSubstitute(comp->var, info->functionData, Img_D2R_c); |
---|
1795 | tmp = abstract; |
---|
1796 | abstract = mdd_and(tmp, nsVar, 1, 1); |
---|
1797 | mdd_free(tmp); |
---|
1798 | mdd_free(nsVar); |
---|
1799 | } |
---|
1800 | ImgComponentFree(comp); |
---|
1801 | } |
---|
1802 | } |
---|
1803 | array_free(tmpVector); |
---|
1804 | } else |
---|
1805 | *newVector = tmpVector; |
---|
1806 | |
---|
1807 | imgComp->func = NIL(mdd_t); |
---|
1808 | ImgComponentFree(imgComp); |
---|
1809 | |
---|
1810 | if (newRelationArray) |
---|
1811 | *newRelationArray = relationArray; |
---|
1812 | if (cofactor) { |
---|
1813 | if (cofactorCube) |
---|
1814 | *cofactorCube = cofactor; |
---|
1815 | else { |
---|
1816 | if (!bdd_is_tautology(cofactor, 1)) { |
---|
1817 | tmpRelationArray = *newRelationArray; |
---|
1818 | *newRelationArray = ImgGetCofactoredRelationArray(tmpRelationArray, |
---|
1819 | cofactor); |
---|
1820 | if (tmpRelationArray != relationArray) |
---|
1821 | mdd_array_free(tmpRelationArray); |
---|
1822 | } |
---|
1823 | mdd_free(cofactor); |
---|
1824 | } |
---|
1825 | } |
---|
1826 | if (abstract) { |
---|
1827 | if (abstractCube) |
---|
1828 | *abstractCube = abstract; |
---|
1829 | else { |
---|
1830 | if (bdd_is_tautology(abstract, 1)) |
---|
1831 | mdd_free(abstract); |
---|
1832 | else { |
---|
1833 | tmpRelationArray = *newRelationArray; |
---|
1834 | *newRelationArray = ImgGetAbstractedRelationArray(info->manager, |
---|
1835 | tmpRelationArray, |
---|
1836 | abstract); |
---|
1837 | mdd_free(abstract); |
---|
1838 | if (tmpRelationArray != relationArray) |
---|
1839 | mdd_array_free(tmpRelationArray); |
---|
1840 | } |
---|
1841 | } |
---|
1842 | } |
---|
1843 | assert(CheckPreImageVector(info, *newVector, newImage)); |
---|
1844 | return(newImage); |
---|
1845 | } |
---|
1846 | |
---|
1847 | |
---|
1848 | /**Function******************************************************************** |
---|
1849 | |
---|
1850 | Synopsis [Makes transition relation canonical for preimage.] |
---|
1851 | |
---|
1852 | Description [Makes transition relation canonical for preimage. |
---|
1853 | Quantifies out the next state variables that do not occur in the image, |
---|
1854 | and when a vector exists, delete the components which do not appear |
---|
1855 | in the image. If a component is constant, simplify the image with the |
---|
1856 | constant value and delete the corresponding component from delta |
---|
1857 | Side effect on delta. Return new image.] |
---|
1858 | |
---|
1859 | SideEffects [] |
---|
1860 | |
---|
1861 | ******************************************************************************/ |
---|
1862 | static bdd_t * |
---|
1863 | PreImageMakeRelationCanonical(ImgTfmInfo_t *info, array_t *vector, bdd_t *image, |
---|
1864 | array_t *relationArray, array_t **newVector, |
---|
1865 | array_t **newRelationArray) |
---|
1866 | { |
---|
1867 | array_t *tmpVector, *cofactoredVector; |
---|
1868 | bdd_t *simple, *tmp, *newImage; |
---|
1869 | ImgComponent_t *comp, *comp1, *imgComp; |
---|
1870 | int i, j, id; |
---|
1871 | mdd_t *cofactor, *abstract, *var, *nsVar; |
---|
1872 | array_t *tmpRelationArray; |
---|
1873 | int changed = 0; |
---|
1874 | mdd_t *yVarsCube, *rangeCube, *relation, *tmp2; |
---|
1875 | array_t *supportIds; |
---|
1876 | |
---|
1877 | imgComp = ImgComponentAlloc(info); |
---|
1878 | imgComp->func = image; |
---|
1879 | ImgComponentGetSupport(imgComp); |
---|
1880 | |
---|
1881 | if (vector) { |
---|
1882 | newImage = mdd_dup(image); |
---|
1883 | cofactor = mdd_one(info->manager); |
---|
1884 | abstract = mdd_one(info->manager); |
---|
1885 | |
---|
1886 | if (info->nIntermediateVars) { |
---|
1887 | mdd_t *tmpCofactor, *tmpAbstract; |
---|
1888 | mdd_t *constIntermediate; |
---|
1889 | |
---|
1890 | if (ImgExistConstIntermediateVar(vector)) { |
---|
1891 | constIntermediate = mdd_one(info->manager); |
---|
1892 | |
---|
1893 | for (i = 0; i < array_n(vector); i++) { |
---|
1894 | comp = array_fetch(ImgComponent_t *, vector, i); |
---|
1895 | if (comp->intermediate) { |
---|
1896 | if (mdd_is_tautology(comp->func, 1)) { |
---|
1897 | tmp = constIntermediate; |
---|
1898 | constIntermediate = mdd_and(tmp, comp->var, 1, 1); |
---|
1899 | mdd_free(tmp); |
---|
1900 | } else if (mdd_is_tautology(comp->func, 0)) { |
---|
1901 | tmp = constIntermediate; |
---|
1902 | constIntermediate = mdd_and(tmp, comp->var, 1, 0); |
---|
1903 | mdd_free(tmp); |
---|
1904 | } |
---|
1905 | } |
---|
1906 | } |
---|
1907 | |
---|
1908 | cofactoredVector = ImgComposeConstIntermediateVars(info, vector, |
---|
1909 | constIntermediate, |
---|
1910 | &tmpCofactor, |
---|
1911 | &tmpAbstract, |
---|
1912 | NIL(mdd_t *), |
---|
1913 | &newImage); |
---|
1914 | |
---|
1915 | if (!bdd_is_tautology(tmpCofactor, 1)) { |
---|
1916 | tmp = cofactor; |
---|
1917 | cofactor = mdd_and(tmp, tmpCofactor, 1, 1); |
---|
1918 | mdd_free(tmp); |
---|
1919 | } |
---|
1920 | mdd_free(tmpCofactor); |
---|
1921 | if (!bdd_is_tautology(tmpAbstract, 1)) { |
---|
1922 | tmp = abstract; |
---|
1923 | abstract = mdd_and(tmp, tmpAbstract, 1, 1); |
---|
1924 | mdd_free(tmp); |
---|
1925 | } |
---|
1926 | mdd_free(tmpAbstract); |
---|
1927 | mdd_free(constIntermediate); |
---|
1928 | } else |
---|
1929 | cofactoredVector = vector; |
---|
1930 | } else |
---|
1931 | cofactoredVector = vector; |
---|
1932 | |
---|
1933 | /* Simplify image -- canonicalize vector */ |
---|
1934 | tmpVector = array_alloc(ImgComponent_t *, 0); |
---|
1935 | for (i = 0; i < array_n(cofactoredVector); i++) { |
---|
1936 | comp = array_fetch(ImgComponent_t *, cofactoredVector, i); |
---|
1937 | if (comp->intermediate) { |
---|
1938 | comp1 = ImgComponentCopy(info, comp); |
---|
1939 | array_insert_last(ImgComponent_t *, tmpVector, comp1); |
---|
1940 | continue; |
---|
1941 | } |
---|
1942 | id = (int)bdd_top_var_id(comp->var); |
---|
1943 | if (!imgComp->support[id]) { |
---|
1944 | if (abstract) { |
---|
1945 | nsVar = ImgSubstitute(comp->var, info->functionData, Img_D2R_c); |
---|
1946 | tmp = abstract; |
---|
1947 | abstract = mdd_and(tmp, nsVar, 1, 1); |
---|
1948 | mdd_free(tmp); |
---|
1949 | mdd_free(nsVar); |
---|
1950 | } |
---|
1951 | continue; |
---|
1952 | } |
---|
1953 | if (mdd_is_tautology(comp->func, 1)) { |
---|
1954 | changed = 1; |
---|
1955 | simple = bdd_cofactor(newImage, comp->var); |
---|
1956 | mdd_free(newImage); |
---|
1957 | newImage = simple; |
---|
1958 | if (abstract) { |
---|
1959 | nsVar = ImgSubstitute(comp->var, info->functionData, Img_D2R_c); |
---|
1960 | tmp = abstract; |
---|
1961 | abstract = mdd_and(tmp, nsVar, 1, 1); |
---|
1962 | mdd_free(tmp); |
---|
1963 | mdd_free(nsVar); |
---|
1964 | } |
---|
1965 | } else if (mdd_is_tautology(comp->func, 0)) { |
---|
1966 | changed = 1; |
---|
1967 | tmp = mdd_not(comp->var); |
---|
1968 | simple = bdd_cofactor(newImage, tmp); |
---|
1969 | mdd_free(tmp); |
---|
1970 | mdd_free(newImage); |
---|
1971 | newImage = simple; |
---|
1972 | if (abstract) { |
---|
1973 | nsVar = ImgSubstitute(comp->var, info->functionData, Img_D2R_c); |
---|
1974 | tmp = abstract; |
---|
1975 | abstract = mdd_and(tmp, nsVar, 1, 1); |
---|
1976 | mdd_free(tmp); |
---|
1977 | mdd_free(nsVar); |
---|
1978 | } |
---|
1979 | } else { |
---|
1980 | comp1 = ImgComponentCopy(info, comp); |
---|
1981 | array_insert_last(ImgComponent_t *, tmpVector, comp1); |
---|
1982 | } |
---|
1983 | } |
---|
1984 | if (cofactoredVector && cofactoredVector != vector) |
---|
1985 | ImgVectorFree(cofactoredVector); |
---|
1986 | |
---|
1987 | if (changed) { |
---|
1988 | /* Now Simplify delta by deleting the non-affecting components */ |
---|
1989 | *newVector = array_alloc(ImgComponent_t *, 0); |
---|
1990 | |
---|
1991 | imgComp->func = NIL(mdd_t); |
---|
1992 | ImgComponentFree(imgComp); |
---|
1993 | |
---|
1994 | imgComp = ImgComponentAlloc(info); |
---|
1995 | imgComp->func = newImage; |
---|
1996 | ImgSupportClear(info, imgComp->support); |
---|
1997 | ImgComponentGetSupport(imgComp); |
---|
1998 | for (i = 0; i < array_n(tmpVector); i++) { |
---|
1999 | comp = array_fetch(ImgComponent_t *, tmpVector, i); |
---|
2000 | id = (int)bdd_top_var_id(comp->var); |
---|
2001 | if (imgComp->support[id] || comp->intermediate) |
---|
2002 | array_insert_last(ImgComponent_t *, *newVector, comp); |
---|
2003 | else { |
---|
2004 | if (abstract) { |
---|
2005 | nsVar = ImgSubstitute(comp->var, info->functionData, Img_D2R_c); |
---|
2006 | tmp = abstract; |
---|
2007 | abstract = mdd_and(tmp, nsVar, 1, 1); |
---|
2008 | mdd_free(tmp); |
---|
2009 | mdd_free(nsVar); |
---|
2010 | } |
---|
2011 | ImgComponentFree(comp); |
---|
2012 | } |
---|
2013 | } |
---|
2014 | array_free(tmpVector); |
---|
2015 | } else |
---|
2016 | *newVector = tmpVector; |
---|
2017 | } else { |
---|
2018 | newImage = image; |
---|
2019 | *newVector = vector; |
---|
2020 | cofactor = NIL(mdd_t); |
---|
2021 | abstract = NIL(mdd_t); |
---|
2022 | } |
---|
2023 | |
---|
2024 | yVarsCube = mdd_one(info->manager); |
---|
2025 | for (i = 0; i < info->nVars; i++) { |
---|
2026 | if (imgComp->support[i]) { |
---|
2027 | imgComp->support[i] = 0; |
---|
2028 | if (st_lookup(info->quantifyVarsTable, (char *)(long)i, NIL(char *))) |
---|
2029 | continue; |
---|
2030 | if (info->intermediateVarsTable && |
---|
2031 | st_lookup(info->intermediateVarsTable, (char *)(long)i, |
---|
2032 | NIL(char *))) { |
---|
2033 | continue; |
---|
2034 | } |
---|
2035 | var = bdd_var_with_index(info->manager, i); |
---|
2036 | nsVar = ImgSubstitute(var, info->functionData, Img_D2R_c); |
---|
2037 | mdd_free(var); |
---|
2038 | id = (int)bdd_top_var_id(nsVar); |
---|
2039 | imgComp->support[id] = 1; |
---|
2040 | tmp = yVarsCube; |
---|
2041 | yVarsCube = mdd_and(tmp, nsVar, 1, 1); |
---|
2042 | mdd_free(tmp); |
---|
2043 | mdd_free(nsVar); |
---|
2044 | } |
---|
2045 | } |
---|
2046 | |
---|
2047 | if (vector) { |
---|
2048 | for (i = 0; i < array_n(*newVector); i++) { |
---|
2049 | comp = array_fetch(ImgComponent_t *, *newVector, i); |
---|
2050 | nsVar = ImgSubstitute(comp->var, info->functionData, Img_D2R_c); |
---|
2051 | id = (int)bdd_top_var_id(nsVar); |
---|
2052 | imgComp->support[id] = 2; |
---|
2053 | mdd_free(nsVar); |
---|
2054 | } |
---|
2055 | } |
---|
2056 | |
---|
2057 | for (i = 0; i < array_n(relationArray); i++) { |
---|
2058 | relation = array_fetch(mdd_t *, relationArray, i); |
---|
2059 | supportIds = mdd_get_bdd_support_ids(info->manager, relation); |
---|
2060 | for (j = 0; j < array_n(supportIds); j++) { |
---|
2061 | id = array_fetch(int, supportIds, j); |
---|
2062 | imgComp->support[id] = 2; |
---|
2063 | } |
---|
2064 | array_free(supportIds); |
---|
2065 | } |
---|
2066 | |
---|
2067 | for (i = 0; i < info->nVars; i++) { |
---|
2068 | if (imgComp->support[i] == 1) { |
---|
2069 | nsVar = bdd_var_with_index(info->manager, i); |
---|
2070 | var = ImgSubstitute(nsVar, info->functionData, Img_R2D_c); |
---|
2071 | mdd_free(nsVar); |
---|
2072 | tmp = newImage; |
---|
2073 | newImage = bdd_smooth_with_cube(tmp, var); |
---|
2074 | if (tmp != image) |
---|
2075 | mdd_free(tmp); |
---|
2076 | mdd_free(var); |
---|
2077 | } |
---|
2078 | } |
---|
2079 | |
---|
2080 | imgComp->func = NIL(mdd_t); |
---|
2081 | ImgComponentFree(imgComp); |
---|
2082 | |
---|
2083 | if (bdd_get_package_name() == CUDD) |
---|
2084 | rangeCube = info->functionData->rangeCube; |
---|
2085 | else { |
---|
2086 | rangeCube = mdd_one(info->manager); |
---|
2087 | for (i = 0; i < array_n(info->functionData->rangeBddVars); i++) { |
---|
2088 | var = array_fetch(mdd_t *, info->functionData->rangeBddVars, i); |
---|
2089 | tmp = rangeCube; |
---|
2090 | rangeCube = mdd_and(tmp, var, 1, 1); |
---|
2091 | mdd_free(tmp); |
---|
2092 | } |
---|
2093 | } |
---|
2094 | |
---|
2095 | cofactor = NIL(mdd_t); |
---|
2096 | if (abstract) { |
---|
2097 | tmp2 = bdd_smooth_with_cube(rangeCube, yVarsCube); |
---|
2098 | tmp = abstract; |
---|
2099 | abstract = mdd_and(tmp, tmp2, 1, 1); |
---|
2100 | mdd_free(tmp); |
---|
2101 | mdd_free(tmp2); |
---|
2102 | } else |
---|
2103 | abstract = bdd_smooth_with_cube(rangeCube, yVarsCube); |
---|
2104 | mdd_free(yVarsCube); |
---|
2105 | if (rangeCube != info->functionData->rangeCube) |
---|
2106 | mdd_free(rangeCube); |
---|
2107 | |
---|
2108 | *newRelationArray = relationArray; |
---|
2109 | if (cofactor) { |
---|
2110 | if (!bdd_is_tautology(cofactor, 1)) { |
---|
2111 | tmpRelationArray = *newRelationArray; |
---|
2112 | *newRelationArray = ImgGetCofactoredRelationArray(tmpRelationArray, |
---|
2113 | cofactor); |
---|
2114 | if (tmpRelationArray != relationArray) |
---|
2115 | mdd_array_free(tmpRelationArray); |
---|
2116 | } |
---|
2117 | mdd_free(cofactor); |
---|
2118 | } |
---|
2119 | if (bdd_is_tautology(abstract, 1)) |
---|
2120 | mdd_free(abstract); |
---|
2121 | else { |
---|
2122 | tmpRelationArray = *newRelationArray; |
---|
2123 | *newRelationArray = ImgGetAbstractedRelationArray(info->manager, |
---|
2124 | tmpRelationArray, |
---|
2125 | abstract); |
---|
2126 | mdd_free(abstract); |
---|
2127 | if (tmpRelationArray != relationArray) |
---|
2128 | mdd_array_free(tmpRelationArray); |
---|
2129 | } |
---|
2130 | return(newImage); |
---|
2131 | } |
---|
2132 | |
---|
2133 | |
---|
2134 | /**Function******************************************************************** |
---|
2135 | |
---|
2136 | Synopsis [Deletes a component in a vector.] |
---|
2137 | |
---|
2138 | Description [Deletes a component in a vector. Deletes index-th component |
---|
2139 | out of delta and copy it into newDelta.] |
---|
2140 | |
---|
2141 | SideEffects [] |
---|
2142 | |
---|
2143 | ******************************************************************************/ |
---|
2144 | static bdd_t * |
---|
2145 | PreImageDeleteOneComponent(ImgTfmInfo_t *info, array_t *delta, int index, |
---|
2146 | array_t **newDelta) |
---|
2147 | { |
---|
2148 | int i; |
---|
2149 | ImgComponent_t *comp, *tmpComp; |
---|
2150 | bdd_t *func, *newFunc; |
---|
2151 | int preMinimize = info->option->preMinimize; |
---|
2152 | |
---|
2153 | assert(array_n(delta) > 0); |
---|
2154 | |
---|
2155 | comp = array_fetch(ImgComponent_t *, delta, index); |
---|
2156 | func = mdd_dup(comp->func); |
---|
2157 | |
---|
2158 | *newDelta = array_alloc(ImgComponent_t *, 0); |
---|
2159 | for (i = 0; i < array_n(delta); i++) { |
---|
2160 | if (i != index) { |
---|
2161 | comp = array_fetch(ImgComponent_t *, delta, i); |
---|
2162 | tmpComp = ImgComponentCopy(info, comp); |
---|
2163 | if (preMinimize) { |
---|
2164 | newFunc = bdd_minimize(tmpComp->func, func); |
---|
2165 | if (mdd_equal(newFunc, tmpComp->func)) |
---|
2166 | mdd_free(newFunc); |
---|
2167 | else { |
---|
2168 | mdd_free(tmpComp->func); |
---|
2169 | tmpComp->func = newFunc; |
---|
2170 | ImgSupportClear(info, tmpComp->support); |
---|
2171 | ImgComponentGetSupport(tmpComp); |
---|
2172 | } |
---|
2173 | } |
---|
2174 | array_insert_last(ImgComponent_t *, (*newDelta), tmpComp); |
---|
2175 | } |
---|
2176 | } |
---|
2177 | |
---|
2178 | return(func); |
---|
2179 | } |
---|
2180 | |
---|
2181 | |
---|
2182 | /**Function******************************************************************** |
---|
2183 | |
---|
2184 | Synopsis [Chooses a splitting variable for preimage.] |
---|
2185 | |
---|
2186 | Description [Chooses a splitting variable for preimage.] |
---|
2187 | |
---|
2188 | SideEffects [] |
---|
2189 | |
---|
2190 | ******************************************************************************/ |
---|
2191 | static int |
---|
2192 | PreImageChooseSplitVar(ImgTfmInfo_t *info, array_t *delta, bdd_t *img, |
---|
2193 | int splitMethod, int split) |
---|
2194 | { |
---|
2195 | ImgComponent_t *comp, *imgComp; |
---|
2196 | int i, j, bestCost, newCost; |
---|
2197 | int index, bestVar, bestComp; |
---|
2198 | int nFuncs, nVars, bestOccur = 0; |
---|
2199 | int *varOccur, *varCost; |
---|
2200 | mdd_t *var, *varNot, *pcFunc, *ncFunc; |
---|
2201 | int tieCount = 0; |
---|
2202 | |
---|
2203 | assert(array_n(delta) > 0); |
---|
2204 | |
---|
2205 | if (splitMethod == 0) { |
---|
2206 | bestVar = -1; |
---|
2207 | bestComp = -1; |
---|
2208 | nFuncs = array_n(delta); |
---|
2209 | nVars = info->nVars; |
---|
2210 | varOccur = ALLOC(int, nVars); |
---|
2211 | memset(varOccur, 0, sizeof(int) * nVars); |
---|
2212 | varCost = NIL(int); |
---|
2213 | for (i = 0; i < nFuncs; i++) { |
---|
2214 | comp = array_fetch(ImgComponent_t *, delta, i); |
---|
2215 | for (j = 0; j < nVars; j++) { |
---|
2216 | if (comp->support[j]) |
---|
2217 | varOccur[j]++; |
---|
2218 | } |
---|
2219 | } |
---|
2220 | switch (split) { |
---|
2221 | case 0: /* largest support */ |
---|
2222 | for (i = 0; i < nVars; i++) { |
---|
2223 | if (varOccur[i] == 0) |
---|
2224 | continue; |
---|
2225 | if (st_lookup(info->quantifyVarsTable, (char *)(long)i, NIL(char *))) |
---|
2226 | continue; |
---|
2227 | if (info->intermediateVarsTable && |
---|
2228 | st_lookup(info->intermediateVarsTable, (char *)(long)i, |
---|
2229 | NIL(char *))) { |
---|
2230 | continue; |
---|
2231 | } |
---|
2232 | if (bestVar == -1 || varOccur[i] > bestOccur) { |
---|
2233 | bestVar = i; |
---|
2234 | bestOccur = varOccur[i]; |
---|
2235 | tieCount = 1; |
---|
2236 | } else if (varOccur[i] == bestOccur) { |
---|
2237 | tieCount++; |
---|
2238 | if (info->option->tieBreakMode == 0 && |
---|
2239 | bdd_get_level_from_id(info->manager, i) < |
---|
2240 | bdd_get_level_from_id(info->manager, bestVar)) { |
---|
2241 | bestVar = i; |
---|
2242 | } |
---|
2243 | } |
---|
2244 | } |
---|
2245 | |
---|
2246 | if (info->option->tieBreakMode == 1 && tieCount > 1) { |
---|
2247 | bestCost = IMG_TF_MAX_INT; |
---|
2248 | for (i = bestVar; i < nVars; i++) { |
---|
2249 | if (varOccur[i] != bestOccur) |
---|
2250 | continue; |
---|
2251 | if (st_lookup(info->quantifyVarsTable, (char *)(long)i, NIL(char *))) |
---|
2252 | continue; |
---|
2253 | if (info->intermediateVarsTable && |
---|
2254 | st_lookup(info->intermediateVarsTable, (char *)(long)i, |
---|
2255 | NIL(char *))) { |
---|
2256 | continue; |
---|
2257 | } |
---|
2258 | var = bdd_var_with_index(info->manager, i); |
---|
2259 | newCost = 0; |
---|
2260 | for (j = 0; j < array_n(delta); j++) { |
---|
2261 | comp = array_fetch(ImgComponent_t *, delta, j); |
---|
2262 | newCost += bdd_estimate_cofactor(comp->func, var, 1); |
---|
2263 | newCost += bdd_estimate_cofactor(comp->func, var, 0); |
---|
2264 | } |
---|
2265 | mdd_free(var); |
---|
2266 | |
---|
2267 | if (newCost < bestCost) { |
---|
2268 | bestVar = i; |
---|
2269 | bestCost = newCost; |
---|
2270 | } else if (newCost == bestCost) { |
---|
2271 | if (bdd_get_level_from_id(info->manager, i) < |
---|
2272 | bdd_get_level_from_id(info->manager, bestVar)) { |
---|
2273 | bestVar = i; |
---|
2274 | } |
---|
2275 | } |
---|
2276 | } |
---|
2277 | } |
---|
2278 | break; |
---|
2279 | case 1: /* smallest support after splitting */ |
---|
2280 | /* Find the variable which makes the smallest support after splitting */ |
---|
2281 | bestCost = IMG_TF_MAX_INT; |
---|
2282 | varCost = ALLOC(int, nVars); |
---|
2283 | memset(varCost, 0, sizeof(int) * nVars); |
---|
2284 | for (i = 0; i < nVars; i++) { |
---|
2285 | if (varOccur[i] == 0) |
---|
2286 | continue; |
---|
2287 | if (st_lookup(info->quantifyVarsTable, (char *)(long)i, NIL(char *))) |
---|
2288 | continue; |
---|
2289 | if (info->intermediateVarsTable && |
---|
2290 | st_lookup(info->intermediateVarsTable, (char *)(long)i, |
---|
2291 | NIL(char *))) { |
---|
2292 | continue; |
---|
2293 | } |
---|
2294 | var = bdd_var_with_index(info->manager, i); |
---|
2295 | varNot = mdd_not(var); |
---|
2296 | for (j = 0; j < array_n(delta); j++) { |
---|
2297 | comp = array_fetch(ImgComponent_t *, delta, j); |
---|
2298 | pcFunc = bdd_cofactor(comp->func, var); |
---|
2299 | varCost[i] += ImgCountBddSupports(pcFunc); |
---|
2300 | mdd_free(pcFunc); |
---|
2301 | ncFunc = bdd_cofactor(comp->func, varNot); |
---|
2302 | varCost[i] += ImgCountBddSupports(ncFunc); |
---|
2303 | mdd_free(ncFunc); |
---|
2304 | } |
---|
2305 | mdd_free(var); |
---|
2306 | mdd_free(varNot); |
---|
2307 | |
---|
2308 | if (varCost[i] < bestCost) { |
---|
2309 | bestCost = varCost[i]; |
---|
2310 | bestVar = i; |
---|
2311 | } else if (varCost[i] == bestCost) { |
---|
2312 | if (varOccur[i] < varOccur[bestVar]) { |
---|
2313 | bestVar = i; |
---|
2314 | } else if (varOccur[i] == varOccur[bestVar]) { |
---|
2315 | if (bdd_get_level_from_id(info->manager, i) < |
---|
2316 | bdd_get_level_from_id(info->manager, bestVar)) { |
---|
2317 | bestVar = i; |
---|
2318 | } |
---|
2319 | } |
---|
2320 | } |
---|
2321 | } |
---|
2322 | break; |
---|
2323 | case 2: /* smallest BDD size after splitting */ |
---|
2324 | /* Find the variable which makes the smallest BDDs of all functions |
---|
2325 | after splitting */ |
---|
2326 | bestCost = IMG_TF_MAX_INT; |
---|
2327 | varCost = ALLOC(int, nVars); |
---|
2328 | memset(varCost, 0, sizeof(int) * nVars); |
---|
2329 | for (i = 0; i < nVars; i++) { |
---|
2330 | if (varOccur[i] == 0) |
---|
2331 | continue; |
---|
2332 | if (st_lookup(info->quantifyVarsTable, (char *)(long)i, NIL(char *))) |
---|
2333 | continue; |
---|
2334 | if (info->intermediateVarsTable && |
---|
2335 | st_lookup(info->intermediateVarsTable, (char *)(long)i, |
---|
2336 | NIL(char *))) { |
---|
2337 | continue; |
---|
2338 | } |
---|
2339 | var = bdd_var_with_index(info->manager, i); |
---|
2340 | for (j = 0; j < array_n(delta); j++) { |
---|
2341 | comp = array_fetch(ImgComponent_t *, delta, j); |
---|
2342 | varCost[i] += bdd_estimate_cofactor(comp->func, var, 1); |
---|
2343 | varCost[i] += bdd_estimate_cofactor(comp->func, var, 0); |
---|
2344 | } |
---|
2345 | mdd_free(var); |
---|
2346 | |
---|
2347 | if (varCost[i] < bestCost) { |
---|
2348 | bestCost = varCost[i]; |
---|
2349 | bestVar = i; |
---|
2350 | } else if (varCost[i] == bestCost) { |
---|
2351 | if (varOccur[i] < varOccur[bestVar]) { |
---|
2352 | bestVar = i; |
---|
2353 | } else if (varOccur[i] == varOccur[bestVar]) { |
---|
2354 | if (bdd_get_level_from_id(info->manager, i) < |
---|
2355 | bdd_get_level_from_id(info->manager, bestVar)) { |
---|
2356 | bestVar = i; |
---|
2357 | } |
---|
2358 | } |
---|
2359 | } |
---|
2360 | } |
---|
2361 | break; |
---|
2362 | case 3: /* top variable */ |
---|
2363 | default: |
---|
2364 | for (i = 0; i < nVars; i++) { |
---|
2365 | if (varOccur[i] == 0) |
---|
2366 | continue; |
---|
2367 | if (st_lookup(info->quantifyVarsTable, (char *)(long)i, NIL(char *))) |
---|
2368 | continue; |
---|
2369 | if (info->intermediateVarsTable && |
---|
2370 | st_lookup(info->intermediateVarsTable, (char *)(long)i, |
---|
2371 | NIL(char *))) { |
---|
2372 | continue; |
---|
2373 | } |
---|
2374 | if (bestVar == -1) |
---|
2375 | bestVar = i; |
---|
2376 | else if (bdd_get_level_from_id(info->manager, i) < |
---|
2377 | bdd_get_level_from_id(info->manager, bestVar)) { |
---|
2378 | bestVar = i; |
---|
2379 | } |
---|
2380 | } |
---|
2381 | } |
---|
2382 | FREE(varOccur); |
---|
2383 | if (varCost) |
---|
2384 | FREE(varCost); |
---|
2385 | } else { |
---|
2386 | bestComp = -1; |
---|
2387 | bestVar = -1; |
---|
2388 | switch (split) { |
---|
2389 | case 0: /* smallest BDD size */ |
---|
2390 | bestCost = IMG_TF_MAX_INT; |
---|
2391 | imgComp = ImgComponentAlloc(info); |
---|
2392 | imgComp->func = img; |
---|
2393 | ImgComponentGetSupport(imgComp); |
---|
2394 | for (i = 0; i < array_n(delta); i++) { |
---|
2395 | comp = array_fetch(ImgComponent_t *, delta, i); |
---|
2396 | if (comp->intermediate) |
---|
2397 | continue; |
---|
2398 | index = (int)bdd_top_var_id(comp->var); |
---|
2399 | if (imgComp->support[index]) { |
---|
2400 | newCost = bdd_size(comp->func); |
---|
2401 | if (newCost < bestCost) { |
---|
2402 | bestComp = i; |
---|
2403 | bestCost = newCost; |
---|
2404 | } |
---|
2405 | } |
---|
2406 | } |
---|
2407 | imgComp->func = NIL(mdd_t); |
---|
2408 | ImgComponentFree(imgComp); |
---|
2409 | break; |
---|
2410 | case 1: /* largest BDD size */ |
---|
2411 | bestCost = 0; |
---|
2412 | imgComp = ImgComponentAlloc(info); |
---|
2413 | imgComp->func = img; |
---|
2414 | ImgComponentGetSupport(imgComp); |
---|
2415 | for (i = 0; i < array_n(delta); i++) { |
---|
2416 | comp = array_fetch(ImgComponent_t *, delta, i); |
---|
2417 | if (comp->intermediate) |
---|
2418 | continue; |
---|
2419 | index = (int)bdd_top_var_id(comp->var); |
---|
2420 | if (imgComp->support[index]) { |
---|
2421 | newCost = bdd_size(comp->func); |
---|
2422 | if (newCost > bestCost) { |
---|
2423 | bestComp = i; |
---|
2424 | bestCost = newCost; |
---|
2425 | } |
---|
2426 | } |
---|
2427 | } |
---|
2428 | imgComp->func = NIL(mdd_t); |
---|
2429 | ImgComponentFree(imgComp); |
---|
2430 | break; |
---|
2431 | case 2: /* top variable */ |
---|
2432 | default: |
---|
2433 | for (i = 0; i < array_n(delta); i++) { |
---|
2434 | comp = array_fetch(ImgComponent_t *, delta, i); |
---|
2435 | if (comp->intermediate) |
---|
2436 | continue; |
---|
2437 | index = (int)bdd_top_var_id(comp->var); |
---|
2438 | if (bestComp == -1 || |
---|
2439 | bdd_get_level_from_id(info->manager, index) < |
---|
2440 | bdd_get_level_from_id(info->manager, bestVar)) { |
---|
2441 | bestVar = index; |
---|
2442 | bestComp = i; |
---|
2443 | } |
---|
2444 | } |
---|
2445 | break; |
---|
2446 | } |
---|
2447 | assert(bestComp != -1); |
---|
2448 | } |
---|
2449 | |
---|
2450 | if (splitMethod == 0) |
---|
2451 | return(bestVar); |
---|
2452 | else |
---|
2453 | return(bestComp); |
---|
2454 | } |
---|
2455 | |
---|
2456 | |
---|
2457 | /**Function******************************************************************** |
---|
2458 | |
---|
2459 | Synopsis [Performs domain cofactoring on a vector and from set with |
---|
2460 | respect to a variable.] |
---|
2461 | |
---|
2462 | Description [Performs domain cofactoring on a vector and from set with |
---|
2463 | respect to a variable.] |
---|
2464 | |
---|
2465 | SideEffects [] |
---|
2466 | |
---|
2467 | ******************************************************************************/ |
---|
2468 | static mdd_t * |
---|
2469 | DomainCofactoring(ImgTfmInfo_t *info, array_t *vector, mdd_t *from, |
---|
2470 | array_t *relationArray, mdd_t *c, array_t **newVector, |
---|
2471 | array_t **newRelationArray, mdd_t **cofactorCube, |
---|
2472 | mdd_t **abstractCube) |
---|
2473 | { |
---|
2474 | mdd_t *res, *tmp; |
---|
2475 | ImgComponent_t *comp, *comp1; |
---|
2476 | array_t *vector1; |
---|
2477 | int i, index, n, pos; |
---|
2478 | mdd_t *newFrom, *var, *nsVar; |
---|
2479 | mdd_t *cofactor, *abstract, *constIntermediate; |
---|
2480 | array_t *tmpRelationArray; |
---|
2481 | st_table *equivTable; |
---|
2482 | int *ptr, *regularPtr; |
---|
2483 | int size; |
---|
2484 | |
---|
2485 | newFrom = mdd_dup(from); |
---|
2486 | vector1 = array_alloc(ImgComponent_t *, 0); |
---|
2487 | |
---|
2488 | if (relationArray) { |
---|
2489 | cofactor = mdd_one(info->manager); |
---|
2490 | abstract = mdd_one(info->manager); |
---|
2491 | } else { |
---|
2492 | cofactor = NIL(mdd_t); |
---|
2493 | abstract = NIL(mdd_t); |
---|
2494 | } |
---|
2495 | |
---|
2496 | if (info->nIntermediateVars) { |
---|
2497 | size = ImgVectorFunctionSize(vector); |
---|
2498 | if (size == array_n(vector)) |
---|
2499 | constIntermediate = NIL(mdd_t); |
---|
2500 | else |
---|
2501 | constIntermediate = mdd_one(info->manager); |
---|
2502 | } else |
---|
2503 | constIntermediate = NIL(mdd_t); |
---|
2504 | |
---|
2505 | n = 0; |
---|
2506 | equivTable = st_init_table(st_ptrcmp, st_ptrhash); |
---|
2507 | index = (int)bdd_top_var_id(c); |
---|
2508 | for (i = 0; i < array_n(vector); i++) { |
---|
2509 | comp = array_fetch(ImgComponent_t *, vector, i); |
---|
2510 | if (comp->support[index]) |
---|
2511 | res = bdd_cofactor(comp->func, c); |
---|
2512 | else |
---|
2513 | res = mdd_dup(comp->func); |
---|
2514 | if (bdd_is_tautology(res, 1)) { |
---|
2515 | if (comp->intermediate) { |
---|
2516 | tmp = constIntermediate; |
---|
2517 | constIntermediate = mdd_and(tmp, comp->var, 1, 1); |
---|
2518 | mdd_free(tmp); |
---|
2519 | mdd_free(res); |
---|
2520 | continue; |
---|
2521 | } |
---|
2522 | tmp = newFrom; |
---|
2523 | newFrom = bdd_cofactor(tmp, comp->var); |
---|
2524 | mdd_free(tmp); |
---|
2525 | mdd_free(res); |
---|
2526 | if (relationArray) { |
---|
2527 | nsVar = ImgSubstitute(comp->var, info->functionData, Img_D2R_c); |
---|
2528 | tmp = abstract; |
---|
2529 | abstract = mdd_and(tmp, nsVar, 1, 1); |
---|
2530 | mdd_free(tmp); |
---|
2531 | mdd_free(nsVar); |
---|
2532 | } |
---|
2533 | } else if (bdd_is_tautology(res, 0)) { |
---|
2534 | if (comp->intermediate) { |
---|
2535 | tmp = constIntermediate; |
---|
2536 | constIntermediate = mdd_and(tmp, comp->var, 1, 0); |
---|
2537 | mdd_free(tmp); |
---|
2538 | mdd_free(res); |
---|
2539 | continue; |
---|
2540 | } |
---|
2541 | tmp = newFrom; |
---|
2542 | var = mdd_not(comp->var); |
---|
2543 | newFrom = bdd_cofactor(tmp, var); |
---|
2544 | mdd_free(tmp); |
---|
2545 | mdd_free(var); |
---|
2546 | mdd_free(res); |
---|
2547 | if (relationArray) { |
---|
2548 | nsVar = ImgSubstitute(comp->var, info->functionData, Img_D2R_c); |
---|
2549 | tmp = abstract; |
---|
2550 | abstract = mdd_and(tmp, nsVar, 1, 1); |
---|
2551 | mdd_free(tmp); |
---|
2552 | mdd_free(nsVar); |
---|
2553 | } |
---|
2554 | } else { |
---|
2555 | if (comp->intermediate) { |
---|
2556 | comp1 = ImgComponentAlloc(info); |
---|
2557 | comp1->var = mdd_dup(comp->var); |
---|
2558 | comp1->func = res; |
---|
2559 | if (mdd_equal(res, comp->func)) |
---|
2560 | ImgSupportCopy(info, comp1->support, comp->support); |
---|
2561 | else |
---|
2562 | ImgComponentGetSupport(comp1); |
---|
2563 | comp1->intermediate = 1; |
---|
2564 | array_insert_last(ImgComponent_t *, vector1, comp1); |
---|
2565 | n++; |
---|
2566 | continue; |
---|
2567 | } |
---|
2568 | ptr = (int *)bdd_pointer(res); |
---|
2569 | regularPtr = (int *)((unsigned long)ptr & ~01); |
---|
2570 | if (st_lookup_int(equivTable, (char *)regularPtr, &pos)) { |
---|
2571 | comp1 = array_fetch(ImgComponent_t *, vector1, pos); |
---|
2572 | if (mdd_equal(res, comp1->func)) { |
---|
2573 | tmp = newFrom; |
---|
2574 | newFrom = bdd_compose(tmp, comp->var, comp1->var); |
---|
2575 | mdd_free(tmp); |
---|
2576 | } else { |
---|
2577 | tmp = newFrom; |
---|
2578 | var = mdd_not(comp1->var); |
---|
2579 | newFrom = bdd_compose(tmp, comp->var, var); |
---|
2580 | mdd_free(tmp); |
---|
2581 | mdd_free(var); |
---|
2582 | } |
---|
2583 | mdd_free(res); |
---|
2584 | if (abstract) { |
---|
2585 | nsVar = ImgSubstitute(comp->var, info->functionData, Img_D2R_c); |
---|
2586 | tmp = abstract; |
---|
2587 | abstract = mdd_and(tmp, nsVar, 1, 1); |
---|
2588 | mdd_free(tmp); |
---|
2589 | mdd_free(nsVar); |
---|
2590 | } |
---|
2591 | } else { |
---|
2592 | comp1 = ImgComponentAlloc(info); |
---|
2593 | comp1->var = mdd_dup(comp->var); |
---|
2594 | comp1->func = res; |
---|
2595 | if (mdd_equal(res, comp->func)) |
---|
2596 | ImgSupportCopy(info, comp1->support, comp->support); |
---|
2597 | else |
---|
2598 | ImgComponentGetSupport(comp1); |
---|
2599 | array_insert_last(ImgComponent_t *, vector1, comp1); |
---|
2600 | st_insert(equivTable, (char *)regularPtr, (char *)(long)n); |
---|
2601 | n++; |
---|
2602 | } |
---|
2603 | } |
---|
2604 | } |
---|
2605 | st_free_table(equivTable); |
---|
2606 | |
---|
2607 | if (constIntermediate) { |
---|
2608 | if (!bdd_is_tautology(constIntermediate, 1)) { |
---|
2609 | mdd_t *tmpCofactor, *tmpAbstract; |
---|
2610 | |
---|
2611 | if (relationArray) { |
---|
2612 | vector1 = ImgComposeConstIntermediateVars(info, vector1, |
---|
2613 | constIntermediate, |
---|
2614 | &tmpCofactor, &tmpAbstract, |
---|
2615 | NIL(mdd_t *), &newFrom); |
---|
2616 | if (!bdd_is_tautology(tmpCofactor, 1)) { |
---|
2617 | tmp = cofactor; |
---|
2618 | cofactor = mdd_and(tmp, tmpCofactor, 1, 1); |
---|
2619 | mdd_free(tmp); |
---|
2620 | } |
---|
2621 | mdd_free(tmpCofactor); |
---|
2622 | if (!bdd_is_tautology(tmpAbstract, 1)) { |
---|
2623 | tmp = abstract; |
---|
2624 | abstract = mdd_and(tmp, tmpAbstract, 1, 1); |
---|
2625 | mdd_free(tmp); |
---|
2626 | } |
---|
2627 | mdd_free(tmpAbstract); |
---|
2628 | tmp = cofactor; |
---|
2629 | cofactor = mdd_and(tmp, constIntermediate, 1, 1); |
---|
2630 | mdd_free(tmp); |
---|
2631 | } else { |
---|
2632 | vector1 = ImgComposeConstIntermediateVars(info, vector1, |
---|
2633 | constIntermediate, |
---|
2634 | NIL(mdd_t *), NIL(mdd_t *), |
---|
2635 | NIL(mdd_t *), &newFrom); |
---|
2636 | } |
---|
2637 | } |
---|
2638 | mdd_free(constIntermediate); |
---|
2639 | } |
---|
2640 | |
---|
2641 | *newVector = vector1; |
---|
2642 | |
---|
2643 | if (relationArray) { |
---|
2644 | if (newRelationArray) |
---|
2645 | *newRelationArray = relationArray; |
---|
2646 | if (cofactorCube && abstractCube) { |
---|
2647 | if (cofactor) { |
---|
2648 | if (bdd_is_tautology(cofactor, 1)) { |
---|
2649 | mdd_free(cofactor); |
---|
2650 | *cofactorCube = mdd_dup(c); |
---|
2651 | } else { |
---|
2652 | *cofactorCube = mdd_and(cofactor, c, 1, 1); |
---|
2653 | mdd_free(cofactor); |
---|
2654 | } |
---|
2655 | } |
---|
2656 | if (abstract) |
---|
2657 | *abstractCube = abstract; |
---|
2658 | } else { |
---|
2659 | if (bdd_is_tautology(cofactor, 1)) { |
---|
2660 | *newRelationArray = ImgGetCofactoredRelationArray(relationArray, c); |
---|
2661 | mdd_free(cofactor); |
---|
2662 | } else { |
---|
2663 | tmp = cofactor; |
---|
2664 | cofactor = mdd_and(tmp, c, 1, 1); |
---|
2665 | mdd_free(tmp); |
---|
2666 | *newRelationArray = ImgGetCofactoredRelationArray(relationArray, |
---|
2667 | cofactor); |
---|
2668 | mdd_free(cofactor); |
---|
2669 | } |
---|
2670 | if (bdd_is_tautology(abstract, 1)) |
---|
2671 | mdd_free(abstract); |
---|
2672 | else { |
---|
2673 | tmpRelationArray = *newRelationArray; |
---|
2674 | *newRelationArray = ImgGetAbstractedRelationArray(info->manager, |
---|
2675 | tmpRelationArray, |
---|
2676 | abstract); |
---|
2677 | mdd_free(abstract); |
---|
2678 | if (tmpRelationArray != relationArray) |
---|
2679 | mdd_array_free(tmpRelationArray); |
---|
2680 | } |
---|
2681 | } |
---|
2682 | } else |
---|
2683 | *newRelationArray = NIL(array_t); |
---|
2684 | |
---|
2685 | return(newFrom); |
---|
2686 | } |
---|
2687 | |
---|
2688 | |
---|
2689 | /**Function******************************************************************** |
---|
2690 | |
---|
2691 | Synopsis [Checks sanity of a vector for preimage.] |
---|
2692 | |
---|
2693 | Description [Checks sanity of a vector for preimage.] |
---|
2694 | |
---|
2695 | SideEffects [] |
---|
2696 | |
---|
2697 | ******************************************************************************/ |
---|
2698 | static int |
---|
2699 | CheckPreImageVector(ImgTfmInfo_t *info, array_t *vector, mdd_t *image) |
---|
2700 | { |
---|
2701 | ImgComponent_t *comp, *imgComp; |
---|
2702 | int i, id, size, status; |
---|
2703 | |
---|
2704 | status = 1; |
---|
2705 | if (info->nIntermediateVars) |
---|
2706 | size = ImgVectorFunctionSize(vector); |
---|
2707 | else |
---|
2708 | size = array_n(vector); |
---|
2709 | if (size != mdd_get_number_of_bdd_support(info->manager, image)) { |
---|
2710 | fprintf(vis_stderr, |
---|
2711 | "** tfm error: function vector length is different. (%d != %d)\n", |
---|
2712 | size, mdd_get_number_of_bdd_support(info->manager, image)); |
---|
2713 | status = 0; |
---|
2714 | } |
---|
2715 | |
---|
2716 | imgComp = ImgComponentAlloc(info); |
---|
2717 | imgComp->func = image; |
---|
2718 | ImgComponentGetSupport(imgComp); |
---|
2719 | for (i = 0; i < array_n(vector); i++) { |
---|
2720 | comp = array_fetch(ImgComponent_t *, vector, i); |
---|
2721 | id = (int)bdd_top_var_id(comp->var); |
---|
2722 | if (comp->intermediate) |
---|
2723 | imgComp->support[id] = 2; |
---|
2724 | else if (imgComp->support[id] == 0) { |
---|
2725 | fprintf(vis_stderr, |
---|
2726 | "** tfm error: variable index[%d] is not in constraint\n", id); |
---|
2727 | status = 0; |
---|
2728 | } else |
---|
2729 | imgComp->support[id] = 2; |
---|
2730 | } |
---|
2731 | for (i = 0; i < info->nVars; i++) { |
---|
2732 | if (imgComp->support[i] == 1) { |
---|
2733 | fprintf(vis_stderr, |
---|
2734 | "** tfm error: variable index[%d] is not in function vector\n", i); |
---|
2735 | status = 0; |
---|
2736 | } |
---|
2737 | } |
---|
2738 | imgComp->func = NIL(mdd_t); |
---|
2739 | ImgComponentFree(imgComp); |
---|
2740 | return(status); |
---|
2741 | } |
---|