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/******************************************************************************
* Top contributors (to current version):
* Andrew Reynolds, Tim King, Haniel Barbosa
*
* This file is part of the cvc5 project.
*
* Copyright (c) 2009-2021 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.
* ****************************************************************************
*
* The theory engine output channel.
*/
#include "cvc5_private.h"
#ifndef CVC5__THEORY__ENGINE_OUTPUT_CHANNEL_H
#define CVC5__THEORY__ENGINE_OUTPUT_CHANNEL_H
#include "expr/node.h"
#include "theory/output_channel.h"
#include "theory/theory_id.h"
#include "util/statistics_stats.h"
namespace cvc5 {
class TheoryEngine;
namespace theory {
class Theory;
/**
* An output channel for Theory that passes messages back to a TheoryEngine
* for a given Theory.
*
* Notice that it has interfaces trustedConflict and trustedLemma which are
* used for ensuring that proof generators are associated with the lemmas
* and conflicts sent on this output channel.
*/
class EngineOutputChannel : public theory::OutputChannel
{
friend class TheoryEngine;
public:
EngineOutputChannel(TheoryEngine* engine, theory::TheoryId theory);
void safePoint(Resource r) override;
void conflict(TNode conflictNode) override;
bool propagate(TNode literal) override;
void lemma(TNode lemma, LemmaProperty p = LemmaProperty::NONE) override;
void demandRestart() override;
void requirePhase(TNode n, bool phase) override;
void setIncomplete(IncompleteId id) override;
void spendResource(Resource r) override;
void handleUserAttribute(const char* attr, theory::Theory* t) override;
/**
* Let pconf be the pair (Node conf, ProofGenerator * pfg). This method
* sends conf on the output channel of this class whose proof can be generated
* by the generator pfg. Apart from pfg, the interface for this method is
* the same as calling OutputChannel::lemma on conf.
*/
void trustedConflict(TrustNode pconf) override;
/**
* Let plem be the pair (Node lem, ProofGenerator * pfg).
* Send lem on the output channel of this class whose proof can be generated
* by the generator pfg. Apart from pfg, the interface for this method is
* the same as calling OutputChannel::lemma on lem.
*/
void trustedLemma(TrustNode plem,
LemmaProperty p = LemmaProperty::NONE) override;
protected:
/**
* Statistics for a particular theory.
*/
class Statistics
{
public:
Statistics(theory::TheoryId theory);
/** Number of calls to conflict, propagate, lemma, requirePhase,
* restartDemands */
IntStat conflicts, propagations, lemmas, requirePhase, restartDemands,
trustedConflicts, trustedLemmas;
};
/** The theory engine we're communicating with. */
TheoryEngine* d_engine;
/** The statistics of the theory interractions. */
Statistics d_statistics;
/** The theory owning this channel. */
theory::TheoryId d_theory;
/** A helper function for registering lemma recipes with the proof engine */
void registerLemmaRecipe(Node lemma,
Node originalLemma,
bool preprocess,
theory::TheoryId theoryId);
};
} // namespace theory
} // namespace cvc5
#endif /* CVC5__THEORY__ENGINE_OUTPUT_CHANNEL_H */
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