Create libsmtutil

libsmtutil/CHCSolverInterface.h

@@ -0,0 +1,50 @@
+/*
+	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/>.
+*/
+
+/**
+ * Interface for constrained Horn solvers.
+ */
+
+#pragma once
+
+#include <libsmtutil/SolverInterface.h>
+
+namespace solidity::frontend::smt
+{
+
+class CHCSolverInterface
+{
+public:
+	virtual ~CHCSolverInterface() = default;
+
+	virtual void declareVariable(std::string const& _name, SortPointer const& _sort) = 0;
+
+	/// Takes a function declaration as a relation.
+	virtual void registerRelation(Expression const& _expr) = 0;
+
+	/// Takes an implication and adds as rule.
+	/// Needs to bound all vars as universally quantified.
+	virtual void addRule(Expression const& _expr, std::string const& _name) = 0;
+
+	/// Takes a function application and checks
+	/// for reachability.
+	virtual std::pair<CheckResult, std::vector<std::string>> query(
+		Expression const& _expr
+	) = 0;
+};
+
+}