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/******************************************************************************
* Top contributors (to current version):
* Caleb Donovick, Andrew Reynolds, Gereon Kremer
*
* This file is part of the cvc5 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.
* ****************************************************************************
*
* 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 "preprocessing/assertion_pipeline.h"
#include "theory/quantifiers/quantifiers_rewriter.h"
#include "theory/rewriter.h"
namespace cvc5 {
namespace preprocessing {
namespace passes {
using namespace std;
using namespace cvc5::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];
TrustNode trn = quantifiers::QuantifiersRewriter::preprocess(prev);
if (!trn.isNull())
{
Node next = trn.getNode();
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 cvc5
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