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/********************* */
/*! \file omt_optimizer.cpp
** \verbatim
** Top contributors (to current version):
** Yancheng Ou
** This file is part of the CVC4 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.\endverbatim
**
** \brief The base class for optimizers of individual CVC4 type
**/
#include "omt/omt_optimizer.h"
#include "omt/bitvector_optimizer.h"
#include "omt/integer_optimizer.h"
#include "options/smt_options.h"
#include "smt/smt_engine.h"
#include "theory/quantifiers/quantifiers_attributes.h"
#include "theory/smt_engine_subsolver.h"
using namespace cvc5::theory;
using namespace cvc5::smt;
namespace cvc5::omt {
std::unique_ptr<OMTOptimizer> OMTOptimizer::getOptimizerForNode(Node targetNode,
bool isSigned)
{
// the datatype of the target node
TypeNode objectiveType = targetNode.getType(true);
if (objectiveType.isInteger())
{
// integer type: use OMTOptimizerInteger
return std::unique_ptr<OMTOptimizer>(new OMTOptimizerInteger());
}
else if (objectiveType.isBitVector())
{
// bitvector type: use OMTOptimizerBitVector
return std::unique_ptr<OMTOptimizer>(new OMTOptimizerBitVector(isSigned));
}
else
{
return nullptr;
}
}
std::unique_ptr<SmtEngine> OMTOptimizer::createOptCheckerWithTimeout(
SmtEngine* parentSMTSolver, bool needsTimeout, unsigned long timeout)
{
std::unique_ptr<SmtEngine> optChecker;
// initializeSubSolver will copy the options and theories enabled
// from the current solver to optChecker and adds timeout
theory::initializeSubsolver(optChecker, needsTimeout, timeout);
// we need to be in incremental mode for multiple objectives since we need to
// push pop we need to produce models to inrement on our objective
optChecker->setOption("incremental", "true");
optChecker->setOption("produce-models", "true");
// Move assertions from the parent solver to the subsolver
std::vector<Node> p_assertions = parentSMTSolver->getExpandedAssertions();
for (const Node& e : p_assertions)
{
optChecker->assertFormula(e);
}
return optChecker;
}
} // namespace cvc5::omt
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