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/********************* */
/*! \file quantifiers_preprocess.cpp
** \verbatim
** Top contributors (to current version):
** Caleb Donovick
** This file is part of the CVC4 project.
** Copyright (c) 2009-2018 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 Remove rewrite rules, apply pre-skolemization to existential
*quantifiers
**
**
** Calls the quantifier rewriter, removing rewrite rules and applying
** pre-skolemization to existential quantifiers
**/
#include "preprocessing/passes/quantifiers_preprocess.h"
#include "base/output.h"
#include "theory/quantifiers/quantifiers_rewriter.h"
#include "theory/rewriter.h"
namespace CVC4 {
namespace preprocessing {
namespace passes {
using namespace CVC4::theory;
QuantifiersPreprocess::QuantifiersPreprocess(PreprocessingPassContext* preprocContext)
: PreprocessingPass(preprocContext, "quantifiers-preprocess"){};
PreprocessingPassResult QuantifiersPreprocess::applyInternal(
AssertionPipeline* assertionsToPreprocess)
{
size_t size = assertionsToPreprocess->size();
for (size_t i = 0; i < size; ++i)
{
Node prev = (*assertionsToPreprocess)[i];
Node next = quantifiers::QuantifiersRewriter::preprocess(prev);
if (next != prev)
{
assertionsToPreprocess->replace(i, Rewriter::rewrite(next));
Trace("quantifiers-preprocess") << "*** Pre-skolemize " << prev << endl;
Trace("quantifiers-preprocess")
<< " ...got " << (*assertionsToPreprocess)[i] << endl;
}
}
return PreprocessingPassResult::NO_CONFLICT;
}
} // namespace passes
} // namespace preprocessing
} // namespace CVC4
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