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/********************* */
/*! \file resolution_bitvector_proof.h
** \verbatim
** Top contributors (to current version):
** Alex Ozdemir, Mathias Preiner, Liana Hadarean
** This file is part of the CVC4 project.
** Copyright (c) 2009-2019 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 Bitvector proof
**
** Bitvector proof
**/
#include "cvc4_private.h"
#ifndef __CVC4__PROOF__RESOLUTION_BITVECTOR_PROOF_H
#define __CVC4__PROOF__RESOLUTION_BITVECTOR_PROOF_H
#include <iosfwd>
#include "context/context.h"
#include "expr/expr.h"
#include "proof/bitvector_proof.h"
#include "proof/sat_proof.h"
#include "proof/theory_proof.h"
#include "prop/bvminisat/core/Solver.h"
#include "prop/cnf_stream.h"
#include "prop/sat_solver_types.h"
#include "theory/bv/bitblast/bitblaster.h"
#include "theory/bv/theory_bv.h"
namespace CVC4 {
typedef TSatProof<CVC4::BVMinisat::Solver> BVSatProof;
namespace proof {
/**
* Represents a bitvector proof which is backed by
* (a) bitblasting and
* (b) a resolution unsat proof.
*
* Contains tools for constructing BV conflicts
*/
class ResolutionBitVectorProof : public BitVectorProof
{
public:
ResolutionBitVectorProof(theory::bv::TheoryBV* bv,
TheoryProofEngine* proofEngine);
/**
* Create an (internal) SAT proof object
* Must be invoked before manipulating BV conflicts,
* or initializing a BNF proof
*/
void initSatProof(CVC4::BVMinisat::Solver* solver);
BVSatProof* getSatProof();
void finalizeConflicts(std::vector<Expr>& conflicts) override;
void startBVConflict(CVC4::BVMinisat::Solver::TCRef cr);
void startBVConflict(CVC4::BVMinisat::Solver::TLit lit);
void endBVConflict(const BVMinisat::Solver::TLitVec& confl);
void markAssumptionConflict() { d_isAssumptionConflict = true; }
bool isAssumptionConflict() const { return d_isAssumptionConflict; }
void initCnfProof(prop::CnfStream* cnfStream,
context::Context* cnf,
prop::SatVariable trueVar,
prop::SatVariable falseVar) override;
protected:
void attachToSatSolver(prop::SatSolver& sat_solver) override;
context::Context d_fakeContext;
// The CNF formula that results from bit-blasting will need a proof.
// This is that proof.
std::unique_ptr<BVSatProof> d_resolutionProof;
bool d_isAssumptionConflict;
};
class LfscResolutionBitVectorProof : public ResolutionBitVectorProof
{
public:
LfscResolutionBitVectorProof(theory::bv::TheoryBV* bv,
TheoryProofEngine* proofEngine)
: ResolutionBitVectorProof(bv, proofEngine)
{
}
void printTheoryLemmaProof(std::vector<Expr>& lemma,
std::ostream& os,
std::ostream& paren,
const ProofLetMap& map) override;
void printBBDeclarationAndCnf(std::ostream& os,
std::ostream& paren,
ProofLetMap& letMap) override;
void printEmptyClauseProof(std::ostream& os, std::ostream& paren) override;
void calculateAtomsInBitblastingProof() override;
};
} // namespace proof
} // namespace CVC4
#endif /* __CVC4__PROOF__RESOLUTIONBITVECTORPROOF_H */
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