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/********************* */
/*! \file theory_proxy.h
** \verbatim
** Top contributors (to current version):
** Tim King, Morgan Deters, Dejan Jovanovic
** This file is part of the CVC4 project.
** Copyright (c) 2009-2018 by the authors listed in the file AUTHORS
** in the top-level source directory) and their institutional affiliations.
** All rights reserved. See the file COPYING in the top-level source
** directory for licensing information.\endverbatim
**
** \brief SAT Solver.
**
** SAT Solver.
**/
#include "cvc4_private.h"
#ifndef __CVC4__PROP__SAT_H
#define __CVC4__PROP__SAT_H
// Just defining this for now, since there's no other SAT solver bindings.
// Optional blocks below will be unconditionally included
#define __CVC4_USE_MINISAT
#include <iosfwd>
#include <unordered_set>
#include "context/cdqueue.h"
#include "expr/expr_stream.h"
#include "expr/node.h"
#include "prop/sat_solver.h"
#include "smt_util/lemma_channels.h"
#include "smt_util/lemma_input_channel.h"
#include "smt_util/lemma_output_channel.h"
#include "theory/theory.h"
#include "util/statistics_registry.h"
namespace CVC4 {
class DecisionEngine;
class TheoryEngine;
namespace prop {
class PropEngine;
class CnfStream;
/**
* The proxy class that allows the SatSolver to communicate with the theories
*/
class TheoryProxy {
public:
TheoryProxy(PropEngine* propEngine,
TheoryEngine* theoryEngine,
DecisionEngine* decisionEngine,
context::Context* context,
CnfStream* cnfStream,
std::ostream* replayLog,
ExprStream* replayStream,
LemmaChannels* globals);
~TheoryProxy();
void theoryCheck(theory::Theory::Effort effort);
void explainPropagation(SatLiteral l, SatClause& explanation);
void theoryPropagate(SatClause& output);
void enqueueTheoryLiteral(const SatLiteral& l);
SatLiteral getNextTheoryDecisionRequest();
SatLiteral getNextDecisionEngineRequest(bool& stopSearch);
bool theoryNeedCheck() const;
/**
* Notifies of a new variable at a decision level.
*/
void variableNotify(SatVariable var);
TNode getNode(SatLiteral lit);
void notifyRestart();
void notifyNewLemma(SatClause& lemma);
SatLiteral getNextReplayDecision();
void logDecision(SatLiteral lit);
void spendResource(unsigned amount);
bool isDecisionEngineDone();
bool isDecisionRelevant(SatVariable var);
SatValue getDecisionPolarity(SatVariable var);
/** Shorthand for Dump("state") << PopCommand() */
void dumpStatePop();
private:
/** The prop engine we are using. */
PropEngine* d_propEngine;
/** The CNF engine we are using. */
CnfStream* d_cnfStream;
/** The decision engine we are using. */
DecisionEngine* d_decisionEngine;
/** The theory engine we are using. */
TheoryEngine* d_theoryEngine;
/** Container for inputChannel() and outputChannel(). */
LemmaChannels* d_channels;
/** Stream on which to log replay events. */
std::ostream* d_replayLog;
/** Stream for replaying decisions. */
ExprStream* d_replayStream;
/** The lemma input channel we are using. */
LemmaInputChannel* inputChannel();
/** The lemma output channel we are using. */
LemmaOutputChannel* outputChannel();
/** Queue of asserted facts */
context::CDQueue<TNode> d_queue;
/**
* Set of all lemmas that have been "shared" in the portfolio---i.e.,
* all imported and exported lemmas.
*/
std::unordered_set<Node, NodeHashFunction> d_shared;
/**
* Statistic: the number of replayed decisions (via --replay).
*/
IntStat d_replayedDecisions;
};/* class SatSolver */
}/* CVC4::prop namespace */
}/* CVC4 namespace */
#endif /* __CVC4__PROP__SAT_H */
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