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/****************************************************************************** |
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* Top contributors (to current version): |
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* Andrew Reynolds, Morgan Deters, 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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* Model class. |
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*/ |
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#include "cvc5_private.h" |
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#ifndef CVC5__MODEL_H |
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#define CVC5__MODEL_H |
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#include <iosfwd> |
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#include <vector> |
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#include "expr/node.h" |
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namespace cvc5 { |
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class SmtEngine; |
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namespace theory { |
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class TheoryModel; |
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} |
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namespace smt { |
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class Model; |
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std::ostream& operator<<(std::ostream&, const Model&); |
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/** |
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* This is the SMT-level model object, that is responsible for maintaining |
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* the necessary information for how to print the model, as well as |
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* holding a pointer to the underlying implementation of the theory model. |
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* |
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* The model declarations maintained by this class are context-independent |
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* and should be updated when this model is printed. |
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*/ |
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class Model { |
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friend std::ostream& operator<<(std::ostream&, const Model&); |
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friend class ::cvc5::SmtEngine; |
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public: |
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/** construct */ |
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Model(theory::TheoryModel* tm); |
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/** virtual destructor */ |
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~Model() {} |
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/** get the input name (file name, etc.) this model is associated to */ |
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std::string getInputName() const { return d_inputName; } |
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/** |
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* Returns true if this model is guaranteed to be a model of the input |
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* formula. Notice that when cvc5 answers "unknown", it may have a model |
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* available for which this method returns false. In this case, this model is |
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* only a candidate solution. |
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*/ |
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bool isKnownSat() const { return d_isKnownSat; } |
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/** Get the underlying theory model */ |
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theory::TheoryModel* getTheoryModel(); |
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/** Get the underlying theory model (const version) */ |
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const theory::TheoryModel* getTheoryModel() const; |
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//----------------------- helper methods in the underlying theory model |
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/** Is the node n a model core symbol? */ |
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bool isModelCoreSymbol(TNode sym) const; |
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/** Get value */ |
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Node getValue(TNode n) const; |
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/** Does this model have approximations? */ |
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bool hasApproximations() const; |
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//----------------------- end helper methods |
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//----------------------- model declarations |
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/** Clear the current model declarations. */ |
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void clearModelDeclarations(); |
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/** |
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* Set that tn is a sort that should be printed in the model, when applicable, |
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* based on the output language. |
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*/ |
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void addDeclarationSort(TypeNode tn); |
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/** |
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* Set that n is a variable that should be printed in the model, when |
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* applicable, based on the output language. |
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*/ |
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void addDeclarationTerm(Node n); |
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/** get declared sorts */ |
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const std::vector<TypeNode>& getDeclaredSorts() const; |
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/** get declared terms */ |
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const std::vector<Node>& getDeclaredTerms() const; |
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//----------------------- end model declarations |
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protected: |
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/** the input name (file name, etc.) this model is associated to */ |
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std::string d_inputName; |
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/** |
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* Flag set to false if the model is associated with an "unknown" response |
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* from the solver. |
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*/ |
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bool d_isKnownSat; |
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/** |
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* Pointer to the underlying theory model, which maintains all data regarding |
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* the values of sorts and terms. |
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*/ |
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theory::TheoryModel* d_tmodel; |
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/** |
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* The list of types to print, generally corresponding to declare-sort |
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* commands. |
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*/ |
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std::vector<TypeNode> d_declareSorts; |
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/** |
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* The list of terms to print, is typically one-to-one with declare-fun |
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* commands. |
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*/ |
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std::vector<Node> d_declareTerms; |
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}; |
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} // namespace smt |
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} // namespace cvc5 |
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#endif /* CVC5__MODEL_H */ |