[SMTChecker] Support contract type

test/libsolidity/smtCheckerTests/functions/function_call_does_not_clear_local_vars.sol

@@ -9,4 +9,5 @@ contract C {
     }
 }
 // ----
+// Warning: (99-103): Assertion checker does not yet support the type of this variable.
 // Warning: (141-144): Assertion checker does not support recursive function calls.

test/libsolidity/smtCheckerTests/functions/functions_external_1.sol

@@ -17,5 +17,4 @@ contract C
 	}
 }
 // ----
-// Warning: (119-122): Assertion checker does not yet support the type of this variable.
 // Warning: (240-254): Assertion violation happens here

test/libsolidity/smtCheckerTests/functions/functions_external_2.sol

@@ -17,5 +17,4 @@ contract C
 	}
 }
 // ----
-// Warning: (139-142): Assertion checker does not yet support the type of this variable.
 // Warning: (280-304): Assertion violation happens here

test/libsolidity/smtCheckerTests/functions/functions_external_3.sol

@@ -18,5 +18,4 @@ contract C
 	}
 }
 // ----
-// Warning: (146-149): Assertion checker does not yet support the type of this variable.
 // Warning: (338-362): Assertion violation happens here

test/libsolidity/smtCheckerTests/types/contract.sol

@@ -0,0 +1,10 @@
+pragma experimental SMTChecker;
+
+contract C
+{
+	function f(C c, C d) public pure {
+		assert(c == d);
+	}
+}
+// ----
+// Warning: (84-98): Assertion violation happens here

test/libsolidity/smtCheckerTests/types/contract_2.sol

@@ -0,0 +1,15 @@
+pragma experimental SMTChecker;
+
+contract D
+{
+	uint x;
+}
+
+contract C
+{
+	function f(D c, D d) public pure {
+		assert(c == d);
+	}
+}
+// ----
+// Warning: (109-123): Assertion violation happens here

test/libsolidity/smtCheckerTests/types/contract_3.sol

@@ -0,0 +1,10 @@
+pragma experimental SMTChecker;
+
+contract C
+{
+	function f(C c, C d, C e) public pure {
+		require(c == d);
+		require(d == e);
+		assert(c == e);
+	}
+}

test/libsolidity/smtCheckerTests/types/contract_address_conversion.sol

@@ -0,0 +1,10 @@
+pragma experimental SMTChecker;
+
+contract C
+{
+	function f(C c, address a) public pure {
+		assert(address(c) == a);
+	}
+}
+// ----
+// Warning: (90-113): Assertion violation happens here

test/libsolidity/smtCheckerTests/types/contract_address_conversion_2.sol

@@ -0,0 +1,11 @@
+pragma experimental SMTChecker;
+
+contract C
+{
+	function f(C c, C d) public pure {
+		assert(address(c) == address(c));
+		address a = address(c);
+		require(c == d);
+		assert(a == address(d));
+	}
+}