mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
67 lines
1.8 KiB
C++
67 lines
1.8 KiB
C++
/*
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This file is part of solidity.
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solidity is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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solidity is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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// SPDX-License-Identifier: GPL-3.0
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/**
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* Interface for constrained Horn solvers.
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*/
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#pragma once
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#include <libsmtutil/SolverInterface.h>
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#include <map>
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#include <vector>
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namespace solidity::smtutil
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{
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class CHCSolverInterface
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{
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public:
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CHCSolverInterface(std::optional<unsigned> _queryTimeout = {}): m_queryTimeout(_queryTimeout) {}
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virtual ~CHCSolverInterface() = default;
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virtual void declareVariable(std::string const& _name, SortPointer const& _sort) = 0;
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/// Takes a function declaration as a relation.
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virtual void registerRelation(Expression const& _expr) = 0;
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/// Takes an implication and adds as rule.
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/// Needs to bound all vars as universally quantified.
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virtual void addRule(Expression const& _expr, std::string const& _name) = 0;
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using CexNode = Expression;
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struct CexGraph
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{
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std::map<unsigned, CexNode> nodes;
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std::map<unsigned, std::vector<unsigned>> edges;
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};
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/// Takes a function application _expr and checks for reachability.
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/// @returns solving result, an invariant, and counterexample graph, if possible.
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virtual std::tuple<CheckResult, Expression, CexGraph> query(
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Expression const& _expr
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) = 0;
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protected:
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std::optional<unsigned> m_queryTimeout;
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};
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}
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