X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;ds=sidebyside;f=src%2Fcsolver.cc;h=8ea79e439069e0ccb5baac8d0028c82fbdf9793b;hb=16486cd2b25f9fc04819e811d519947704679bed;hp=d825df5e4c2a8d12192ec1fb5da68fe60eac06cc;hpb=9b6f097f739d112bf3363f107064752cb8318c0b;p=satune.git

diff --git a/src/csolver.cc b/src/csolver.cc
index d825df5..8ea79e4 100644
--- a/src/csolver.cc
+++ b/src/csolver.cc
@@ -11,11 +11,26 @@
 #include "sattranslator.h"
 #include "tunable.h"
 #include "polarityassignment.h"
-#include "orderdecompose.h"
-
-CSolver::CSolver() : unsat(false) {
-	tuner = new Tuner();
-	satEncoder = allocSATEncoder(this);
+#include "decomposeordertransform.h"
+#include "autotuner.h"
+#include "astops.h"
+#include "structs.h"
+#include "orderresolver.h"
+#include "integerencoding.h"
+#include "qsort.h"
+#include "preprocess.h"
+#include "serializer.h"
+#include "deserializer.h"
+#include "encodinggraph.h"
+
+CSolver::CSolver() :
+	boolTrue(BooleanEdge(new BooleanConst(true))),
+	boolFalse(boolTrue.negate()),
+	unsat(false),
+	tuner(NULL),
+	elapsedTime(0)
+{
+	satEncoder = new SATEncoder(this);
 }
 
 /** This function tears down the solver and the entire AST */
@@ -56,8 +71,39 @@ CSolver::~CSolver() {
 		delete allFunctions.get(i);
 	}
 
-	deleteSATEncoder(satEncoder);
-	delete tuner;
+	delete boolTrue.getBoolean();
+	delete satEncoder;
+}
+
+CSolver *CSolver::clone() {
+	CSolver *copy = new CSolver();
+	CloneMap map;
+	SetIteratorBooleanEdge *it = getConstraints();
+	while (it->hasNext()) {
+		BooleanEdge b = it->next();
+		copy->addConstraint(cloneEdge(copy, &map, b));
+	}
+	delete it;
+	return copy;
+}
+
+void CSolver::serialize() {
+	model_print("serializing ...\n");
+	{
+		Serializer serializer("dump");
+		SetIteratorBooleanEdge *it = getConstraints();
+		while (it->hasNext()) {
+			BooleanEdge b = it->next();
+			serializeBooleanEdge(&serializer, b);
+		}
+		delete it;
+	}
+	model_print("deserializing ...\n");
+	{
+		Deserializer deserializer("dump");
+		deserializer.deserialize();
+	}
+	
 }
 
 Set *CSolver::createSet(VarType type, uint64_t *elements, uint numelements) {
@@ -72,6 +118,11 @@ Set *CSolver::createRangeSet(VarType type, uint64_t lowrange, uint64_t highrange
 	return set;
 }
 
+Element *CSolver::createRangeVar(VarType type, uint64_t lowrange, uint64_t highrange) {
+	Set *s = createRangeSet(type, lowrange, highrange);
+	return getElementVar(s);
+}
+
 MutableSet *CSolver::createMutableSet(VarType type) {
 	MutableSet *set = new MutableSet(type);
 	allSets.push(set);
@@ -83,11 +134,15 @@ void CSolver::addItem(MutableSet *set, uint64_t element) {
 }
 
 uint64_t CSolver::createUniqueItem(MutableSet *set) {
-	uint64_t element = set->low++;
+	uint64_t element = set->getNewUniqueItem();
 	set->addElementMSet(element);
 	return element;
 }
 
+void CSolver::finalizeMutableSet(MutableSet* set){
+	set->finalize();
+}
+
 Element *CSolver::getElementVar(Set *set) {
 	Element *element = new ElementSet(set);
 	allElements.push(element);
@@ -95,15 +150,34 @@ Element *CSolver::getElementVar(Set *set) {
 }
 
 Element *CSolver::getElementConst(VarType type, uint64_t value) {
-	Element *element = new ElementConst(value, type);
-	allElements.push(element);
-	return element;
+	uint64_t array[] = {value};
+	Set *set = new Set(type, array, 1);
+	Element *element = new ElementConst(value, set);
+	Element *e = elemMap.get(element);
+	if (e == NULL) {
+		allSets.push(set);
+		allElements.push(element);
+		elemMap.put(element, element);
+		return element;
+	} else {
+		delete set;
+		delete element;
+		return e;
+	}
 }
 
-Boolean *CSolver::getBooleanVar(VarType type) {
-	Boolean *boolean = new BooleanVar(type);
-	allBooleans.push(boolean);
-	return boolean;
+Element *CSolver::applyFunction(Function *function, Element **array, uint numArrays, BooleanEdge overflowstatus) {
+	Element *element = new ElementFunction(function,array,numArrays,overflowstatus);
+	Element *e = elemMap.get(element);
+	if (e == NULL) {
+		element->updateParents();
+		allElements.push(element);
+		elemMap.put(element, element);
+		return element;
+	} else {
+		delete element;
+		return e;
+	}
 }
 
 Function *CSolver::createFunctionOperator(ArithOp op, Set **domain, uint numDomain, Set *range,OverFlowBehavior overflowbehavior) {
@@ -144,60 +218,245 @@ Function *CSolver::completeTable(Table *table, UndefinedBehavior behavior) {
 	return function;
 }
 
-Element *CSolver::applyFunction(Function *function, Element **array, uint numArrays, Boolean *overflowstatus) {
-	Element *element = new ElementFunction(function,array,numArrays,overflowstatus);
-	allElements.push(element);
-	return element;
+BooleanEdge CSolver::getBooleanVar(VarType type) {
+	Boolean *boolean = new BooleanVar(type);
+	allBooleans.push(boolean);
+	return BooleanEdge(boolean);
+}
+
+BooleanEdge CSolver::getBooleanTrue() {
+	return boolTrue;
 }
 
-Boolean *CSolver::applyPredicate(Predicate *predicate, Element **inputs, uint numInputs) {
-	return applyPredicateTable(predicate, inputs, numInputs, NULL);
+BooleanEdge CSolver::getBooleanFalse() {
+	return boolFalse;
 }
 
-Boolean *CSolver::applyPredicateTable(Predicate *predicate, Element **inputs, uint numInputs, Boolean *undefinedStatus) {
+BooleanEdge CSolver::applyPredicate(Predicate *predicate, Element **inputs, uint numInputs) {
+	return applyPredicateTable(predicate, inputs, numInputs, BooleanEdge(NULL));
+}
+
+BooleanEdge CSolver::applyPredicateTable(Predicate *predicate, Element **inputs, uint numInputs, BooleanEdge undefinedStatus) {
 	BooleanPredicate *boolean = new BooleanPredicate(predicate, inputs, numInputs, undefinedStatus);
-	allBooleans.push(boolean);
-	return boolean;
+	Boolean *b = boolMap.get(boolean);
+	if (b == NULL) {
+		boolean->updateParents();
+		boolMap.put(boolean, boolean);
+		allBooleans.push(boolean);
+		return BooleanEdge(boolean);
+	} else {
+		delete boolean;
+		return BooleanEdge(b);
+	}
+}
+
+bool CSolver::isTrue(BooleanEdge b) {
+	return b.isNegated()?b->isFalse():b->isTrue();
+}
+
+bool CSolver::isFalse(BooleanEdge b) {
+	return b.isNegated()?b->isTrue():b->isFalse();
 }
 
-Boolean *CSolver::applyLogicalOperation(LogicOp op, Boolean **array, uint asize) {
+BooleanEdge CSolver::applyLogicalOperation(LogicOp op, BooleanEdge arg1, BooleanEdge arg2) {
+	BooleanEdge array[] = {arg1, arg2};
+	return applyLogicalOperation(op, array, 2);
+}
+
+BooleanEdge CSolver::applyLogicalOperation(LogicOp op, BooleanEdge arg) {
+	BooleanEdge array[] = {arg};
+	return applyLogicalOperation(op, array, 1);
+}
+
+static int ptrcompares(const void *p1, const void *p2) {
+	uintptr_t b1 = *(uintptr_t const *) p1;
+  uintptr_t b2 = *(uintptr_t const *) p2;
+	if (b1 < b2)
+		return -1;
+	else if (b1 == b2)
+		return 0;
+	else
+		return 1;
+}
+
+BooleanEdge CSolver::rewriteLogicalOperation(LogicOp op, BooleanEdge * array, uint asize) {
+	BooleanEdge newarray[asize];
+	memcpy(newarray, array, asize * sizeof(BooleanEdge));
+	for(uint i=0; i < asize; i++) {
+		BooleanEdge b=newarray[i];
+		if (b->type == LOGICOP) {
+			if (((BooleanLogic *) b.getBoolean())->replaced) {
+				newarray[i] = doRewrite(newarray[i]);
+				i--;//Check again
+			}
+		}
+	}
+	return applyLogicalOperation(op, newarray, asize);
+}
+
+BooleanEdge CSolver::applyLogicalOperation(LogicOp op, BooleanEdge *array, uint asize) {
+	BooleanEdge newarray[asize];
+	switch (op) {
+	case SATC_NOT: {
+		return array[0].negate();
+	}
+	case SATC_IFF: {
+		for (uint i = 0; i < 2; i++) {
+			if (array[i]->type == BOOLCONST) {
+				if (array[i]->isTrue()) {
+					return array[1 - i];
+				} else {
+					newarray[0] = array[1 - i];
+					return applyLogicalOperation(SATC_NOT, newarray, 1);
+				}
+			} else if (array[i]->type == LOGICOP) {
+				BooleanLogic *b =(BooleanLogic *)array[i].getBoolean();
+				if (b->replaced) {
+					return rewriteLogicalOperation(op, array, asize);
+				}
+			}
+		}
+		break;
+	}
+	case SATC_OR: {
+		for (uint i =0; i <asize; i++) {
+			newarray[i] = applyLogicalOperation(SATC_NOT, array[i]);
+		}
+		return applyLogicalOperation(SATC_NOT, applyLogicalOperation(SATC_AND, newarray, asize));
+	}
+	case SATC_AND: {
+		uint newindex = 0;
+		for (uint i = 0; i < asize; i++) {
+			BooleanEdge b = array[i];
+			if (b->type == LOGICOP) {
+				if (((BooleanLogic *)b.getBoolean())->replaced)
+					return rewriteLogicalOperation(op, array, asize);
+			}
+			if (b->type == BOOLCONST) {
+				if (b->isTrue())
+					continue;
+				else
+					return boolFalse;
+			} else
+				newarray[newindex++] = b;
+		}
+		if (newindex == 0) {
+			return boolTrue;
+		} else if (newindex == 1) {
+			return newarray[0];
+		} else {
+			bsdqsort(newarray, newindex, sizeof(BooleanEdge), ptrcompares);
+			array = newarray;
+			asize = newindex;
+		}
+		break;
+	}
+	case SATC_XOR: {
+		//handle by translation
+		return applyLogicalOperation(SATC_NOT, applyLogicalOperation(SATC_IFF, array, asize));
+	}
+	case SATC_IMPLIES: {
+		//handle by translation
+		return applyLogicalOperation(SATC_OR, applyLogicalOperation(SATC_NOT, array[0]), array[1]);
+	}
+	}
+
+	ASSERT(asize != 0);
 	Boolean *boolean = new BooleanLogic(this, op, array, asize);
-	allBooleans.push(boolean);
-	return boolean;
+	Boolean *b = boolMap.get(boolean);
+	if (b == NULL) {
+		boolean->updateParents();
+		boolMap.put(boolean, boolean);
+		allBooleans.push(boolean);
+		return BooleanEdge(boolean);
+	} else {
+		delete boolean;
+		return BooleanEdge(b);
+	}
 }
 
-void CSolver::addConstraint(Boolean *constraint) {
-	constraints.add(constraint);
+BooleanEdge CSolver::orderConstraint(Order *order, uint64_t first, uint64_t second) {
+	Boolean *constraint = new BooleanOrder(order, first, second);
+	allBooleans.push(constraint);
+	return BooleanEdge(constraint);
+}
+
+void CSolver::addConstraint(BooleanEdge constraint) {
+	if (isTrue(constraint))
+		return;
+	else if (isFalse(constraint))
+		setUnSAT();
+	else {
+		if (constraint->type == LOGICOP) {
+			BooleanLogic *b=(BooleanLogic *) constraint.getBoolean();
+			if (!constraint.isNegated()) {
+				if (b->op==SATC_AND) {
+					for(uint i=0;i<b->inputs.getSize();i++) {
+						addConstraint(b->inputs.get(i));
+					}
+					return;
+				}
+			}
+			if (b->replaced) {
+				addConstraint(doRewrite(constraint));
+				return;
+			}
+		}
+		constraints.add(constraint);
+		Boolean *ptr=constraint.getBoolean();
+		
+		if (ptr->boolVal == BV_UNSAT)
+			setUnSAT();
+		
+		replaceBooleanWithTrueNoRemove(constraint);
+		constraint->parents.clear();
+	}
 }
 
 Order *CSolver::createOrder(OrderType type, Set *set) {
 	Order *order = new Order(type, set);
 	allOrders.push(order);
+	activeOrders.add(order);
 	return order;
 }
 
-Boolean *CSolver::orderConstraint(Order *order, uint64_t first, uint64_t second) {
-	Boolean *constraint = new BooleanOrder(order, first, second);
-	allBooleans.push(constraint);
-	return constraint;
-}
+int CSolver::solve() {
+	bool deleteTuner = false;
+	if (tuner == NULL) {
+		tuner = new DefaultTuner();
+		deleteTuner = true;
+	}
 
-int CSolver::startEncoding() {
+	long long startTime = getTimeNano();
 	computePolarities(this);
-	orderAnalysis(this);
+
+	Preprocess pp(this);
+	pp.doTransform();
+	
+	DecomposeOrderTransform dot(this);
+	dot.doTransform();
+
+	IntegerEncodingTransform iet(this);
+	iet.doTransform();
+
+	EncodingGraph eg(this);
+	eg.buildGraph();
+	eg.encode();
+	
 	naiveEncodingDecision(this);
-	encodeAllSATEncoder(this, satEncoder);
-	int result = solveCNF(satEncoder->cnf);
-	model_print("sat_solver's result:%d\tsolutionSize=%d\n", result, satEncoder->cnf->solver->solutionsize);
-	for (int i = 1; i <= satEncoder->cnf->solver->solutionsize; i++) {
-		model_print("%d, ", satEncoder->cnf->solver->solution[i]);
+	satEncoder->encodeAllSATEncoder(this);
+	int result = unsat ? IS_UNSAT : satEncoder->solve();
+	long long finishTime = getTimeNano();
+	elapsedTime = finishTime - startTime;
+	if (deleteTuner) {
+		delete tuner;
+		tuner = NULL;
 	}
-	model_print("\n");
 	return result;
 }
 
 uint64_t CSolver::getElementValue(Element *element) {
-	switch (GETELEMENTTYPE(element)) {
+	switch (element->type) {
 	case ELEMSET:
 	case ELEMCONST:
 	case ELEMFUNCRETURN:
@@ -208,8 +467,9 @@ uint64_t CSolver::getElementValue(Element *element) {
 	exit(-1);
 }
 
-bool CSolver::getBooleanValue(Boolean *boolean) {
-	switch (GETBOOLEANTYPE(boolean)) {
+bool CSolver::getBooleanValue(BooleanEdge bedge) {
+	Boolean *boolean=bedge.getBoolean();
+	switch (boolean->type) {
 	case BOOLEANVAR:
 		return getBooleanVariableValueSATTranslator(this, boolean);
 	default:
@@ -218,7 +478,17 @@ bool CSolver::getBooleanValue(Boolean *boolean) {
 	exit(-1);
 }
 
-HappenedBefore CSolver::getOrderConstraintValue(Order *order, uint64_t first, uint64_t second) {
-	return getOrderConstraintValueSATTranslator(this, order, first, second);
+bool CSolver::getOrderConstraintValue(Order *order, uint64_t first, uint64_t second) {
+	return order->encoding.resolver->resolveOrder(first, second);
 }
 
+long long CSolver::getEncodeTime() { return satEncoder->getEncodeTime(); }
+
+long long CSolver::getSolveTime() { return satEncoder->getSolveTime(); }
+
+void CSolver::autoTune(uint budget) {
+	AutoTuner *autotuner = new AutoTuner(budget);
+	autotuner->addProblem(this);
+	autotuner->tune();
+	delete autotuner;
+}