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 {//Adding new elements and boolean/predicate to solver regarding memory management
65 pushVectorBoolean(This->solver->allBooleans, boolean);
66 pushVectorPredicate(This->solver->allPredicates, predicate);
67 pushVectorElement(This->solver->allElements, elem1);
68 pushVectorElement(This->solver->allElements, elem2);
70 return encodeConstraintSATEncoder(This, boolean);
73 Edge inferOrderConstraintFromGraph(Order* order, uint64_t _first, uint64_t _second){
74 if (order->graph != NULL) {
75 OrderGraph *graph=order->graph;
76 OrderNode *first=lookupOrderNodeFromOrderGraph(graph, _first);
77 OrderNode *second=lookupOrderNodeFromOrderGraph(graph, _second);
78 if ((first != NULL) && (second != NULL)) {
79 OrderEdge *edge=lookupOrderEdgeFromOrderGraph(graph, first, second);
83 else if (edge->mustNeg)
86 OrderEdge *invedge=getOrderEdgeFromOrderGraph(graph, second, first);
87 if (invedge != NULL) {
90 else if (invedge->mustNeg)
98 Element* getOrderIntegerElement(SATEncoder* This,Order *order, uint64_t item) {
99 HashSetOrderElement* eset = order->elementTable;
100 OrderElement oelement ={item, NULL};
101 if( !containsHashSetOrderElement(eset, &oelement)){
102 Element* elem = allocElementSet(order->set);
103 ElementEncoding* encoding = getElementEncoding(elem);
104 setElementEncodingType(encoding, BINARYINDEX);
105 encodingArrayInitialization(encoding);
106 encodeElementSATEncoder(This, elem);
107 addHashSetOrderElement(eset, allocOrderElement(item, elem));
110 return getHashSetOrderElement(eset, &oelement)->elem;
112 Edge getPairConstraint(SATEncoder *This, Order *order, OrderPair *pair) {
113 Edge gvalue = inferOrderConstraintFromGraph(order, pair->first, pair->second);
114 if(!edgeIsNull(gvalue))
117 HashTableOrderPair *table = order->orderPairTable;
120 if (pair->first < pair->second) {
122 flipped.first = pair->second;
123 flipped.second = pair->first;
127 if (!containsOrderPair(table, pair)) {
128 constraint = getNewVarSATEncoder(This);
129 OrderPair *paircopy = allocOrderPair(pair->first, pair->second, constraint);
130 putOrderPair(table, paircopy, paircopy);
132 constraint = getOrderPair(table, pair)->constraint;
134 return negate ? constraintNegate(constraint) : constraint;
137 Edge encodeTotalOrderSATEncoder(SATEncoder *This, BooleanOrder *boolOrder) {
138 ASSERT(boolOrder->order->type == TOTAL);
139 if (boolOrder->order->orderPairTable == NULL) {
140 initializeOrderHashTable(boolOrder->order);
141 bool doOptOrderStructure=GETVARTUNABLE(This->solver->tuner, boolOrder->order->type, OPTIMIZEORDERSTRUCTURE, &onoff);
142 if (doOptOrderStructure) {
143 boolOrder->order->graph = buildMustOrderGraph(boolOrder->order);
144 reachMustAnalysis(This->solver, boolOrder->order->graph, true);
146 createAllTotalOrderConstraintsSATEncoder(This, boolOrder->order);
148 OrderPair pair = {boolOrder->first, boolOrder->second, E_NULL};
149 Edge constraint = getPairConstraint(This, boolOrder->order, &pair);
154 void createAllTotalOrderConstraintsSATEncoder(SATEncoder *This, Order *order) {
156 model_print("in total order ...\n");
158 ASSERT(order->type == TOTAL);
159 VectorInt *mems = order->set->members;
160 uint size = getSizeVectorInt(mems);
161 for (uint i = 0; i < size; i++) {
162 uint64_t valueI = getVectorInt(mems, i);
163 for (uint j = i + 1; j < size; j++) {
164 uint64_t valueJ = getVectorInt(mems, j);
165 OrderPair pairIJ = {valueI, valueJ};
166 Edge constIJ = getPairConstraint(This, order, &pairIJ);
167 for (uint k = j + 1; k < size; k++) {
168 uint64_t valueK = getVectorInt(mems, k);
169 OrderPair pairJK = {valueJ, valueK};
170 OrderPair pairIK = {valueI, valueK};
171 Edge constIK = getPairConstraint(This, order, &pairIK);
172 Edge constJK = getPairConstraint(This, order, &pairJK);
173 addConstraintCNF(This->cnf, generateTransOrderConstraintSATEncoder(This, constIJ, constJK, constIK));
179 Edge getOrderConstraint(HashTableOrderPair *table, OrderPair *pair) {
180 ASSERT(pair->first != pair->second);
183 if (pair->first < pair->second) {
185 flipped.first = pair->second;
186 flipped.second = pair->first;
189 if (!containsOrderPair(table, pair)) {
192 Edge constraint = getOrderPair(table, pair)->constraint;
193 ASSERT(!edgeIsNull(constraint));
194 return negate ? constraintNegate(constraint) : constraint;
197 Edge generateTransOrderConstraintSATEncoder(SATEncoder *This, Edge constIJ,Edge constJK,Edge constIK) {
198 Edge carray[] = {constIJ, constJK, constraintNegate(constIK)};
199 Edge loop1 = constraintOR(This->cnf, 3, carray);
200 Edge carray2[] = {constraintNegate(constIJ), constraintNegate(constJK), constIK};
201 Edge loop2 = constraintOR(This->cnf, 3, carray2 );
202 return constraintAND2(This->cnf, loop1, loop2);
205 Edge encodePartialOrderSATEncoder(SATEncoder *This, BooleanOrder *constraint) {
206 ASSERT(constraint->order->type == PARTIAL);