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/****************************************************************************** |
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* Top contributors (to current version): |
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* Mathias Preiner, Andrew Reynolds, Aina Niemetz |
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* |
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* This file is part of the cvc5 project. |
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* |
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* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS |
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* in the top-level source directory and their institutional affiliations. |
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* All rights reserved. See the file COPYING in the top-level source |
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* directory for licensing information. |
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* **************************************************************************** |
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* |
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* The BvAbstraction preprocessing pass. |
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* |
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* Abstract common structures over small domains to UF. This preprocessing |
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* is particularly useful on QF_BV/mcm benchmarks and can be enabled via |
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* option `--bv-abstraction`. |
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* For more information see 3.4 Refactoring Isomorphic Circuits in [1]. |
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* |
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* [1] Liana Hadarean, An Efficient and Trustworthy Theory Solver for |
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* Bit-vectors in Satisfiability Modulo Theories |
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* https://cs.nyu.edu/media/publications/hadarean_liana.pdf |
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*/ |
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#include "preprocessing/passes/bv_abstraction.h" |
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#include <vector> |
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#include "options/bv_options.h" |
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#include "preprocessing/assertion_pipeline.h" |
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#include "preprocessing/preprocessing_pass_context.h" |
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#include "theory/bv/theory_bv.h" |
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#include "theory/rewriter.h" |
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#include "theory/theory_engine.h" |
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namespace cvc5 { |
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namespace preprocessing { |
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namespace passes { |
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using namespace cvc5::theory; |
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BvAbstraction::BvAbstraction(PreprocessingPassContext* preprocContext) |
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: PreprocessingPass(preprocContext, "bv-abstraction"){}; |
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PreprocessingPassResult BvAbstraction::applyInternal( |
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AssertionPipeline* assertionsToPreprocess) |
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{ |
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std::vector<Node> new_assertions; |
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std::vector<Node> assertions(assertionsToPreprocess->begin(), |
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assertionsToPreprocess->end()); |
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TheoryEngine* te = d_preprocContext->getTheoryEngine(); |
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bv::TheoryBV* bv_theory = static_cast<bv::TheoryBV*>(te->theoryOf(THEORY_BV)); |
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bv_theory->applyAbstraction(assertions, new_assertions); |
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for (unsigned i = 0, size = assertionsToPreprocess->size(); i < size; ++i) |
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{ |
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assertionsToPreprocess->replace(i, Rewriter::rewrite(new_assertions[i])); |
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} |
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return PreprocessingPassResult::NO_CONFLICT; |
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} |
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} // namespace passes |
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} // namespace preprocessing |
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} // namespace cvc5 |