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/********************* */
/*! \file assertion_pipeline.cpp
** \verbatim
** Top contributors (to current version):
** Andres Noetzli, Justin Xu, Morgan Deters
** 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 AssertionPipeline stores a list of assertions modified by
** preprocessing passes
**/
#include "preprocessing/assertion_pipeline.h"
#include "expr/node_manager.h"
#include "proof/proof.h"
#include "proof/proof_manager.h"
#include "theory/rewriter.h"
namespace CVC4 {
namespace preprocessing {
AssertionPipeline::AssertionPipeline()
: d_realAssertionsEnd(0),
d_storeSubstsInAsserts(false),
d_substsIndex(0),
d_assumptionsStart(0),
d_numAssumptions(0),
d_pppg(nullptr)
{
}
void AssertionPipeline::clear()
{
d_nodes.clear();
d_realAssertionsEnd = 0;
d_assumptionsStart = 0;
d_numAssumptions = 0;
}
void AssertionPipeline::push_back(Node n,
bool isAssumption,
bool isInput,
ProofGenerator* pgen)
{
d_nodes.push_back(n);
if (isAssumption)
{
Assert(pgen == nullptr);
if (d_numAssumptions == 0)
{
d_assumptionsStart = d_nodes.size() - 1;
}
// Currently, we assume that assumptions are all added one after another
// and that we store them in the same vector as the assertions. Once we
// split the assertions up into multiple vectors (see issue #2473), we will
// not have this limitation anymore.
Assert(d_assumptionsStart + d_numAssumptions == d_nodes.size() - 1);
d_numAssumptions++;
}
if (!isInput && isProofEnabled())
{
// notice this is always called, regardless of whether pgen is nullptr
d_pppg->notifyNewAssert(n, pgen);
}
}
void AssertionPipeline::pushBackTrusted(theory::TrustNode trn)
{
Assert(trn.getKind() == theory::TrustNodeKind::LEMMA);
// push back what was proven
push_back(trn.getProven(), false, trn.getGenerator());
}
void AssertionPipeline::replace(size_t i, Node n, ProofGenerator* pgen)
{
PROOF(ProofManager::currentPM()->addDependence(n, d_nodes[i]););
if (isProofEnabled())
{
d_pppg->notifyPreprocessed(d_nodes[i], n, pgen);
}
d_nodes[i] = n;
}
void AssertionPipeline::replaceTrusted(size_t i, theory::TrustNode trn)
{
Assert(trn.getKind() == theory::TrustNodeKind::REWRITE);
replace(i, trn.getNode(), trn.getGenerator());
}
void AssertionPipeline::replace(size_t i,
Node n,
const std::vector<Node>& addnDeps,
ProofGenerator* pgen)
{
PROOF(ProofManager::currentPM()->addDependence(n, d_nodes[i]);
for (const auto& addnDep
: addnDeps) {
ProofManager::currentPM()->addDependence(n, addnDep);
});
if (isProofEnabled())
{
d_pppg->notifyPreprocessed(d_nodes[i], n, pgen);
}
d_nodes[i] = n;
}
void AssertionPipeline::setProofGenerator(smt::PreprocessProofGenerator* pppg)
{
d_pppg = pppg;
}
bool AssertionPipeline::isProofEnabled() const { return d_pppg != nullptr; }
void AssertionPipeline::enableStoreSubstsInAsserts()
{
d_storeSubstsInAsserts = true;
d_substsIndex = d_nodes.size();
d_nodes.push_back(NodeManager::currentNM()->mkConst<bool>(true));
}
void AssertionPipeline::disableStoreSubstsInAsserts()
{
d_storeSubstsInAsserts = false;
}
void AssertionPipeline::addSubstitutionNode(Node n)
{
Assert(d_storeSubstsInAsserts);
Assert(n.getKind() == kind::EQUAL);
d_nodes[d_substsIndex] = theory::Rewriter::rewrite(
NodeManager::currentNM()->mkNode(kind::AND, n, d_nodes[d_substsIndex]));
Assert(theory::Rewriter::rewrite(d_nodes[d_substsIndex])
== d_nodes[d_substsIndex]);
}
} // namespace preprocessing
} // namespace CVC4
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