1 #include "satencoder.h"
9 #include "orderencoder.h"
10 #include "ordergraph.h"
11 #include "orderedge.h"
13 #include "predicate.h"
14 #include "orderelement.h"
16 Edge encodeOrderSATEncoder(SATEncoder *This, BooleanOrder *constraint) {
17 if(constraint->order->order.type == INTEGERENCODING){
18 return orderIntegerEncodingSATEncoder(This, constraint);
20 switch ( constraint->order->type) {
22 return encodePartialOrderSATEncoder(This, constraint);
24 return encodeTotalOrderSATEncoder(This, constraint);
31 Edge orderIntegerEncodingSATEncoder(SATEncoder *This, BooleanOrder *boolOrder){
32 if(boolOrder->order->graph == NULL){
33 bool doOptOrderStructure=GETVARTUNABLE(This->solver->tuner, boolOrder->order->type,
34 OPTIMIZEORDERSTRUCTURE, &onoff);
35 if (doOptOrderStructure ) {
36 boolOrder->order->graph = buildMustOrderGraph(boolOrder->order);
37 reachMustAnalysis(This->solver, boolOrder->order->graph, true);
40 Order* order = boolOrder->order;
41 Edge gvalue = inferOrderConstraintFromGraph(order, boolOrder->first, boolOrder->second);
42 if(!edgeIsNull(gvalue))
45 if (boolOrder->order->elementTable == NULL) {
46 initializeOrderElementsHashTable(boolOrder->order);
48 //getting two elements and using LT predicate ...
49 Element* elem1 = getOrderIntegerElement(This, order, boolOrder->first);
50 ElementEncoding *encoding = getElementEncoding(elem1);
51 if (getElementEncodingType(encoding) == ELEM_UNASSIGNED) {
52 setElementEncodingType(encoding, BINARYINDEX);
53 encodingArrayInitialization(encoding);
55 Element* elem2 = getOrderIntegerElement(This, order, boolOrder->second);
56 encoding = getElementEncoding(elem2);
57 if (getElementEncodingType(encoding) == ELEM_UNASSIGNED) {
58 setElementEncodingType(encoding, BINARYINDEX);
59 encodingArrayInitialization(encoding);
61 Predicate *predicate =allocPredicateOperator(LT, (Set*[]){order->set, order->set}, 2);
62 Boolean * boolean=allocBooleanPredicate(predicate, (Element *[]){elem1,elem2}, 2, NULL);
63 setFunctionEncodingType(getPredicateFunctionEncoding((BooleanPredicate*)boolean), CIRCUIT);
64 return encodeConstraintSATEncoder(This, boolean);
67 Edge inferOrderConstraintFromGraph(Order* order, uint64_t _first, uint64_t _second){
68 if (order->graph != NULL) {
69 OrderGraph *graph=order->graph;
70 OrderNode *first=lookupOrderNodeFromOrderGraph(graph, _first);
71 OrderNode *second=lookupOrderNodeFromOrderGraph(graph, _second);
72 if ((first != NULL) && (second != NULL)) {
73 OrderEdge *edge=lookupOrderEdgeFromOrderGraph(graph, first, second);
77 else if (edge->mustNeg)
80 OrderEdge *invedge=getOrderEdgeFromOrderGraph(graph, second, first);
81 if (invedge != NULL) {
84 else if (invedge->mustNeg)
92 Element* getOrderIntegerElement(SATEncoder* This,Order *order, uint64_t item) {
93 HashSetOrderElement* eset = order->elementTable;
94 OrderElement oelement ={item, NULL};
95 if( !containsHashSetOrderElement(eset, &oelement)){
96 Element* elem = allocElementSet(order->set);
97 ElementEncoding* encoding = getElementEncoding(elem);
98 setElementEncodingType(encoding, BINARYINDEX);
99 encodingArrayInitialization(encoding);
100 encodeElementSATEncoder(This, elem);
101 addHashSetOrderElement(eset, allocOrderElement(item, elem));
104 return getHashSetOrderElement(eset, &oelement)->elem;
106 Edge getPairConstraint(SATEncoder *This, Order *order, OrderPair *pair) {
107 Edge gvalue = inferOrderConstraintFromGraph(order, pair->first, pair->second);
108 if(!edgeIsNull(gvalue))
111 HashTableOrderPair *table = order->orderPairTable;
114 if (pair->first < pair->second) {
116 flipped.first = pair->second;
117 flipped.second = pair->first;
121 if (!containsOrderPair(table, pair)) {
122 constraint = getNewVarSATEncoder(This);
123 OrderPair *paircopy = allocOrderPair(pair->first, pair->second, constraint);
124 putOrderPair(table, paircopy, paircopy);
126 constraint = getOrderPair(table, pair)->constraint;
128 return negate ? constraintNegate(constraint) : constraint;
131 Edge encodeTotalOrderSATEncoder(SATEncoder *This, BooleanOrder *boolOrder) {
132 ASSERT(boolOrder->order->type == TOTAL);
133 if (boolOrder->order->orderPairTable == NULL) {
134 initializeOrderHashTable(boolOrder->order);
135 bool doOptOrderStructure=GETVARTUNABLE(This->solver->tuner, boolOrder->order->type, OPTIMIZEORDERSTRUCTURE, &onoff);
136 if (doOptOrderStructure) {
137 boolOrder->order->graph = buildMustOrderGraph(boolOrder->order);
138 reachMustAnalysis(This->solver, boolOrder->order->graph, true);
140 createAllTotalOrderConstraintsSATEncoder(This, boolOrder->order);
142 OrderPair pair = {boolOrder->first, boolOrder->second, E_NULL};
143 Edge constraint = getPairConstraint(This, boolOrder->order, &pair);
148 void createAllTotalOrderConstraintsSATEncoder(SATEncoder *This, Order *order) {
150 model_print("in total order ...\n");
152 ASSERT(order->type == TOTAL);
153 VectorInt *mems = order->set->members;
154 uint size = getSizeVectorInt(mems);
155 for (uint i = 0; i < size; i++) {
156 uint64_t valueI = getVectorInt(mems, i);
157 for (uint j = i + 1; j < size; j++) {
158 uint64_t valueJ = getVectorInt(mems, j);
159 OrderPair pairIJ = {valueI, valueJ};
160 Edge constIJ = getPairConstraint(This, order, &pairIJ);
161 for (uint k = j + 1; k < size; k++) {
162 uint64_t valueK = getVectorInt(mems, k);
163 OrderPair pairJK = {valueJ, valueK};
164 OrderPair pairIK = {valueI, valueK};
165 Edge constIK = getPairConstraint(This, order, &pairIK);
166 Edge constJK = getPairConstraint(This, order, &pairJK);
167 addConstraintCNF(This->cnf, generateTransOrderConstraintSATEncoder(This, constIJ, constJK, constIK));
173 Edge getOrderConstraint(HashTableOrderPair *table, OrderPair *pair) {
174 ASSERT(pair->first != pair->second);
177 if (pair->first < pair->second) {
179 flipped.first = pair->second;
180 flipped.second = pair->first;
183 if (!containsOrderPair(table, pair)) {
186 Edge constraint = getOrderPair(table, pair)->constraint;
187 ASSERT(!edgeIsNull(constraint));
188 return negate ? constraintNegate(constraint) : constraint;
191 Edge generateTransOrderConstraintSATEncoder(SATEncoder *This, Edge constIJ,Edge constJK,Edge constIK) {
192 Edge carray[] = {constIJ, constJK, constraintNegate(constIK)};
193 Edge loop1 = constraintOR(This->cnf, 3, carray);
194 Edge carray2[] = {constraintNegate(constIJ), constraintNegate(constJK), constIK};
195 Edge loop2 = constraintOR(This->cnf, 3, carray2 );
196 return constraintAND2(This->cnf, loop1, loop2);
199 Edge encodePartialOrderSATEncoder(SATEncoder *This, BooleanOrder *constraint) {
200 ASSERT(constraint->order->type == PARTIAL);