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/****************************************************************************** |
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* Top contributors (to current version): |
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* Gereon Kremer, Andrew Reynolds, Tim King |
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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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* Check for split zero lemma. |
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*/ |
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#ifndef CVC5__THEORY__ARITH__NL__EXT__SPLIT_ZERO_CHECK_H |
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#define CVC5__THEORY__ARITH__NL__EXT__SPLIT_ZERO_CHECK_H |
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#include "context/cdhashset.h" |
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#include "expr/node.h" |
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#include "smt/env_obj.h" |
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namespace cvc5 { |
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namespace theory { |
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namespace arith { |
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namespace nl { |
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struct ExtState; |
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class SplitZeroCheck : protected EnvObj |
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{ |
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public: |
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SplitZeroCheck(Env& env, ExtState* data); |
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/** check split zero |
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* |
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* Returns a set of theory lemmas of the form |
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* t = 0 V t != 0 |
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* where t is a term that exists in the current context. |
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*/ |
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void check(); |
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private: |
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using NodeSet = context::CDHashSet<Node>; |
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/** Basic data that is shared with other checks */ |
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ExtState* d_data; |
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/** cache of terms t for which we have added the lemma ( t = 0 V t != 0 ). */ |
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NodeSet d_zero_split; |
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}; |
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} // namespace nl |
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} // namespace arith |
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} // namespace theory |
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} // namespace cvc5 |
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#endif |