solidity/libsmtutil/CVC4Interface.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
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#pragma once
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#include <libsmtutil/SolverInterface.h>
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#if defined(__GLIBC__)
// The CVC4 headers includes the deprecated system headers <ext/hash_map>
// and <ext/hash_set>. These headers cause a warning that will break the
// build, unless _GLIBCXX_PERMIT_BACKWARD_HASH is set.
#define _GLIBCXX_PERMIT_BACKWARD_HASH
#endif
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#include <cvc4/cvc4.h>
#if defined(__GLIBC__)
#undef _GLIBCXX_PERMIT_BACKWARD_HASH
#endif
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namespace solidity::smtutil
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{
class CVC4Interface: public SolverInterface
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{
public:
/// Noncopyable.
CVC4Interface(CVC4Interface const&) = delete;
CVC4Interface& operator=(CVC4Interface const&) = delete;
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CVC4Interface(std::optional<unsigned> _queryTimeout = {});
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void reset() override;
void push() override;
void pop() override;
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void declareVariable(std::string const&, SortPointer const&) override;
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void addAssertion(Expression const& _expr) override;
std::pair<CheckResult, std::vector<std::string>> check(std::vector<Expression> const& _expressionsToEvaluate) override;
private:
CVC4::Expr toCVC4Expr(Expression const& _expr);
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CVC4::Type cvc4Sort(Sort const& _sort);
std::vector<CVC4::Type> cvc4Sort(std::vector<SortPointer> const& _sorts);
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CVC4::ExprManager m_context;
CVC4::SmtEngine m_solver;
std::map<std::string, CVC4::Expr> m_variables;
// CVC4 "basic resources" limit.
// This is used to make the runs more deterministic and platform/machine independent.
// The tests start failing for CVC4 with less than 6000,
// so using double that.
static int const resourceLimit = 12000;
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};
}