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/****************************************************************************** |
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* Top contributors (to current version): |
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* Andrew Reynolds, Mathias Preiner |
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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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* Utility for building model cores. |
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*/ |
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#include "cvc5_private.h" |
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#ifndef CVC5__THEORY__MODEL_CORE_BUILDER_H |
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#define CVC5__THEORY__MODEL_CORE_BUILDER_H |
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#include <vector> |
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#include "expr/node.h" |
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#include "options/smt_options.h" |
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#include "smt/env_obj.h" |
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#include "theory/theory_model.h" |
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namespace cvc5 { |
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/** |
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* A utility for building model cores. |
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*/ |
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class ModelCoreBuilder : protected EnvObj |
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{ |
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public: |
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ModelCoreBuilder(Env& env); |
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/** set model core |
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* |
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* This function updates model m so that it has information regarding its |
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* "model core". A model core for m is a substitution of the form |
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* { s1 -> m(s1), ..., sn -> m(sn) } |
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* |
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* The criteria for what consistutes a model core given by mode. For |
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* example, if mode is ModelCoresMode::SIMPLE, then a model core |
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* corresponds to a subset of assignments from the model that suffice to show |
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* that the set of assertions, interpreted conjunctively, evaluates to true |
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* under the substitution corresponding to the model core. |
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* |
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* The model core is recorded on the model object m via calls to |
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* m->setUsingModelCore, m->recordModelCoreSymbol, for details see |
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* smt/model.h. In particular, we call: |
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* m->usingModelCore(); |
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* m->recordModelCoreSymbol(s1); ... m->recordModelCoreSymbol(sn); |
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* such that { s1 -> m(s1), ..., sn -> m(sn) } is the model core computed |
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* by this class. |
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* |
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* If m is not a model for assertions, this method returns false and m is |
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* left unchanged. |
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*/ |
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bool setModelCore(const std::vector<Node>& assertions, |
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theory::TheoryModel* m, |
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options::ModelCoresMode mode); |
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}; /* class TheoryModelCoreBuilder */ |
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} // namespace cvc5 |
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#endif /* CVC5__THEORY__MODEL_CORE_BUILDER_H */ |