solidity/libsmtutil/Z3CHCInterface.h

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/*
This file is part of solidity.
solidity is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
solidity is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with solidity. If not, see <http://www.gnu.org/licenses/>.
*/
// SPDX-License-Identifier: GPL-3.0
/**
* Z3 specific Horn solver interface.
*/
#pragma once
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#include <libsmtutil/CHCSolverInterface.h>
#include <libsmtutil/Z3Interface.h>
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#include <tuple>
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#include <vector>
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namespace solidity::smtutil
{
class Z3CHCInterface: public CHCSolverInterface
{
public:
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Z3CHCInterface(std::optional<unsigned> _queryTimeout = {});
/// Forwards variable declaration to Z3Interface.
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void declareVariable(std::string const& _name, SortPointer const& _sort) override;
void registerRelation(Expression const& _expr) override;
void addRule(Expression const& _expr, std::string const& _name) override;
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std::tuple<CheckResult, Expression, CexGraph> query(Expression const& _expr) override;
Z3Interface* z3Interface() const { return m_z3Interface.get(); }
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void setSpacerOptions(bool _preProcessing = true);
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private:
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/// Constructs a nonlinear counterexample graph from the refutation.
CHCSolverInterface::CexGraph cexGraph(z3::expr const& _proof);
/// @returns the fact from a proof node.
z3::expr fact(z3::expr const& _node);
/// @returns @a _predicate's name.
std::string name(z3::expr const& _predicate);
/// @returns the arguments of @a _predicate.
std::vector<std::string> arguments(z3::expr const& _predicate);
// Used to handle variables.
std::unique_ptr<Z3Interface> m_z3Interface;
z3::context* m_context;
// Horn solver.
z3::fixedpoint m_solver;
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std::tuple<unsigned, unsigned, unsigned, unsigned> m_version = std::tuple(0, 0, 0, 0);
};
}