solidity/libsmtutil/Z3CHCInterface.h
2020-11-03 10:46:11 +00:00

70 lines
2.0 KiB
C++

/*
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
#include <libsmtutil/CHCSolverInterface.h>
#include <libsmtutil/Z3Interface.h>
#include <vector>
namespace solidity::smtutil
{
class Z3CHCInterface: public CHCSolverInterface
{
public:
Z3CHCInterface(std::optional<unsigned> _queryTimeout = {});
/// Forwards variable declaration to Z3Interface.
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;
std::pair<CheckResult, CexGraph> query(Expression const& _expr) override;
Z3Interface* z3Interface() const { return m_z3Interface.get(); }
void setSpacerOptions(bool _preProcessing = true);
private:
/// 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;
};
}