generateAnyValueBinaryValueEncoding(encoding);
}
+void SATEncoder::freezeElementVariables(ElementEncoding *encoding) {
+ ASSERT(encoding->element->frozen);
+ for (uint i = 0; i < encoding->numVars; i++) {
+ Edge e = encoding->variables[i];
+ ASSERT(edgeIsVarConst(e));
+ freezeVariable(cnf, e);
+ }
+ for(uint i=0; i< encoding->encArraySize; i++){
+ if(encoding->isinUseElement(i) && encoding->encoding != EENC_NONE && encoding->numVars > 1){
+ Edge e = encoding->edgeArray[i];
+ if(!edgeIsNull(e)){
+ ASSERT(edgeIsVarConst(e));
+ freezeVariable(cnf, e);
+ }
+ }
+ }
+}
+
void SATEncoder::generateBinaryIndexEncodingVars(ElementEncoding *encoding) {
ASSERT(encoding->type == BINARYINDEX);
allocElementConstraintVariables(encoding, NUMBITS(encoding->encArraySize - 1));
getArrayNewVarsSATEncoder(encoding->numVars, encoding->variables);
if (encoding->element->anyValue) {
uint setSize = encoding->element->getRange()->getSize();
- int maxIndex = getMaximumUsedIndex(encoding);
- if (maxIndex != -1 && (maxIndex - setSize) != 0 && (setSize / (maxIndex - setSize)) < pow(1.9, (uint)solver->getTuner()->getTunable(MUSTVALUE, &mustValueBinaryIndex) - 4)) {
+ int maxIndex = getMaximumUsedSize(encoding);
+ if (setSize == encoding->encArraySize && maxIndex == (int)setSize) {
+ return;
+ }
+ double ratio = (setSize * (1 + 2 * encoding->numVars)) / (encoding->numVars * (encoding->numVars + maxIndex * 1.0 - setSize));
+// model_print("encArraySize=%u\tmaxIndex=%d\tsetSize=%u\tmetric=%f\tnumBits=%u\n", encoding->encArraySize, maxIndex, setSize, ratio, encoding->numVars);
+ if ( ratio < pow(2, (uint)solver->getTuner()->getTunable(MUSTVALUE, &mustValueBinaryIndex) - 3)) {
generateAnyValueBinaryIndexEncodingPositive(encoding);
} else {
generateAnyValueBinaryIndexEncoding(encoding);
}
}
-int SATEncoder::getMaximumUsedIndex(ElementEncoding *encoding) {
- int index = -1;
- for (uint i = encoding->encArraySize - 1; i >= 0; i--) {
- if (encoding->isinUseElement(i)) {
- if (i + 1 < encoding->encArraySize) {
- index = i + 1;
- }
- break;
- }
+int SATEncoder::getMaximumUsedSize(ElementEncoding *encoding) {
+ if(encoding->encArraySize == 1){
+ return 1;
+ }
+ for (int i = encoding->encArraySize - 1; i >= 0; i--) {
+ if (encoding->isinUseElement(i))
+ return i + 1;
}
- return index;
+ ASSERT(false);
+ return -1;
}
void SATEncoder::generateAnyValueBinaryIndexEncoding(ElementEncoding *encoding) {
if (encoding->numVars == 0)
return;
- int index = getMaximumUsedIndex(encoding);
- if ( index != -1 ) {
+ int index = getMaximumUsedSize(encoding);
+ if ( index != (int)encoding->encArraySize ) {
addConstraintCNF(cnf, generateLTValueConstraint(cnf, encoding->numVars, encoding->variables, index));
}
- index = index == -1 ? encoding->encArraySize - 1 : index - 1;
- for (int i = index; i >= 0; i--) {
+ for (int i = index - 1; i >= 0; i--) {
if (!encoding->isinUseElement(i)) {
addConstraintCNF(cnf, constraintNegate( generateBinaryConstraint(cnf, encoding->numVars, encoding->variables, i)));
}