Create libsmtutil

libsmtutil/CVC4Interface.h

@@ -0,0 +1,70 @@
+/*
+	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/>.
+*/
+
+#pragma once
+
+#include <libsmtutil/SolverInterface.h>
+#include <boost/noncopyable.hpp>
+
+#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
+
+#include <cvc4/cvc4.h>
+
+#if defined(__GLIBC__)
+#undef _GLIBCXX_PERMIT_BACKWARD_HASH
+#endif
+
+namespace solidity::frontend::smt
+{
+
+class CVC4Interface: public SolverInterface, public boost::noncopyable
+{
+public:
+	CVC4Interface();
+
+	void reset() override;
+
+	void push() override;
+	void pop() override;
+
+	void declareVariable(std::string const&, SortPointer const&) override;
+
+	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);
+	CVC4::Type cvc4Sort(smt::Sort const& _sort);
+	std::vector<CVC4::Type> cvc4Sort(std::vector<smt::SortPointer> const& _sorts);
+
+	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;
+};
+
+}