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/********************* */
/*! \file proof_generator.cpp
** \verbatim
** Top contributors (to current version):
** Andrew Reynolds
** This file is part of the CVC4 project.
** Copyright (c) 2009-2020 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 Implementation of proof generator utility
**/
#include "expr/proof_generator.h"
#include <sstream>
#include "expr/proof.h"
#include "expr/proof_node.h"
#include "expr/proof_node_algorithm.h"
#include "options/smt_options.h"
namespace CVC4 {
std::ostream& operator<<(std::ostream& out, CDPOverwrite opol)
{
switch (opol)
{
case CDPOverwrite::ALWAYS: out << "ALWAYS"; break;
case CDPOverwrite::ASSUME_ONLY: out << "ASSUME_ONLY"; break;
case CDPOverwrite::NEVER: out << "NEVER"; break;
default: out << "CDPOverwrite:unknown"; break;
}
return out;
}
ProofGenerator::ProofGenerator() {}
ProofGenerator::~ProofGenerator() {}
std::shared_ptr<ProofNode> ProofGenerator::getProofFor(Node f)
{
Unreachable() << "ProofGenerator::getProofFor: " << identify()
<< " has no implementation" << std::endl;
return nullptr;
}
bool ProofGenerator::addProofTo(Node f,
CDProof* pf,
CDPOverwrite opolicy,
bool doCopy)
{
Trace("pfgen") << "ProofGenerator::addProofTo: " << f << "..." << std::endl;
Assert(pf != nullptr);
// plug in the proof provided by the generator, if it exists
std::shared_ptr<ProofNode> apf = getProofFor(f);
if (apf != nullptr)
{
Trace("pfgen") << "...got proof " << *apf.get() << std::endl;
if (pf->addProof(apf, opolicy, doCopy))
{
Trace("pfgen") << "...success!" << std::endl;
return true;
}
Trace("pfgen") << "...failed to add proof" << std::endl;
}
else
{
Trace("pfgen") << "...failed, no proof" << std::endl;
Assert(false) << "Failed to get proof from generator for fact " << f;
}
return false;
}
} // namespace CVC4
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