[SMTChecker] Support array length

test/libsolidity/smtCheckerTests/array_members/length_1d_assignment_2d_memory_to_memory.sol

@@ -0,0 +1,10 @@
+pragma experimental SMTChecker;
+pragma experimental ABIEncoderV2;
+
+contract C {
+	function f(uint[][] memory arr) public pure {
+		uint[][] memory arr2 = arr;
+		assert(arr2[0].length == arr[0].length);
+		assert(arr.length == arr2.length);
+	}
+}

test/libsolidity/smtCheckerTests/array_members/length_1d_assignment_2d_storage_to_storage.sol

@@ -0,0 +1,11 @@
+pragma experimental SMTChecker;
+pragma experimental ABIEncoderV2;
+
+contract C {
+	uint[][] arr;
+	uint[][] arr2;
+	function f() public view {
+		assert(arr2[0].length == arr[0].length);
+		assert(arr2.length == arr.length);
+	}
+}

test/libsolidity/smtCheckerTests/array_members/length_1d_copy_2d_memory_to_storage.sol

@@ -0,0 +1,11 @@
+pragma experimental SMTChecker;
+pragma experimental ABIEncoderV2;
+
+contract C {
+	uint[][] arr;
+	function f(uint[][] memory arr2) public {
+		arr = arr2;
+		assert(arr2[0].length == arr[0].length);
+		assert(arr2.length == arr.length);
+	}
+}

test/libsolidity/smtCheckerTests/array_members/length_1d_copy_2d_storage_to_memory.sol

@@ -0,0 +1,11 @@
+pragma experimental SMTChecker;
+pragma experimental ABIEncoderV2;
+
+contract C {
+	uint[][] arr;
+	function f() public view {
+		uint[][] memory arr2 = arr;
+		assert(arr2[0].length == arr[0].length);
+		assert(arr2.length == arr.length);
+	}
+}

test/libsolidity/smtCheckerTests/array_members/length_1d_mapping_array_1.sol

@@ -0,0 +1,8 @@
+pragma experimental SMTChecker;
+
+contract C {
+	mapping (uint => uint[]) map;
+	function f() public view {
+		assert(map[0].length == map[1].length);
+	}
+}

test/libsolidity/smtCheckerTests/array_members/length_1d_mapping_array_2.sol

@@ -0,0 +1,9 @@
+pragma experimental SMTChecker;
+
+contract C {
+	mapping (uint => uint[]) map;
+	function f(uint x, uint y) public view {
+		require(x == y);
+		assert(map[x].length == map[y].length);
+	}
+}

test/libsolidity/smtCheckerTests/array_members/length_1d_mapping_array_2d_1.sol

@@ -0,0 +1,9 @@
+pragma experimental SMTChecker;
+
+contract C {
+	mapping (uint => uint[][]) map;
+	function f(uint x, uint y) public view {
+		require(x == y);
+		assert(map[x][0].length == map[y][0].length);
+	}
+}

test/libsolidity/smtCheckerTests/array_members/length_1d_struct_array_1.sol

@@ -0,0 +1,20 @@
+pragma experimental SMTChecker;
+
+contract C {
+	struct S {
+		uint[] arr;
+	}
+	S s1;
+	S s2;
+	function f() public view {
+		assert(s1.arr.length == s2.arr.length);
+	}
+}
+// ----
+// Warning: (76-80): Assertion checker does not yet support the type of this variable.
+// Warning: (83-87): Assertion checker does not yet support the type of this variable.
+// Warning: (126-132): Assertion checker does not yet support this expression.
+// Warning: (126-128): Assertion checker does not yet implement type struct C.S storage ref
+// Warning: (143-149): Assertion checker does not yet support this expression.
+// Warning: (143-145): Assertion checker does not yet implement type struct C.S storage ref
+// Warning: (119-157): Assertion violation happens here

test/libsolidity/smtCheckerTests/array_members/length_1d_struct_array_2d_1.sol

@@ -0,0 +1,22 @@
+pragma experimental SMTChecker;
+
+contract C {
+	struct S {
+		uint[][] arr;
+	}
+	S s1;
+	S s2;
+	function f() public view {
+		assert(s1.arr[0].length == s2.arr[0].length);
+	}
+}
+// ----
+// Warning: (78-82): Assertion checker does not yet support the type of this variable.
+// Warning: (85-89): Assertion checker does not yet support the type of this variable.
+// Warning: (128-134): Assertion checker does not yet support this expression.
+// Warning: (128-130): Assertion checker does not yet implement type struct C.S storage ref
+// Warning: (128-137): Assertion checker does not yet implement this expression.
+// Warning: (148-154): Assertion checker does not yet support this expression.
+// Warning: (148-150): Assertion checker does not yet implement type struct C.S storage ref
+// Warning: (148-157): Assertion checker does not yet implement this expression.
+// Warning: (121-165): Assertion violation happens here

test/libsolidity/smtCheckerTests/array_members/length_assignment_2d_memory_to_memory.sol

@@ -0,0 +1,9 @@
+pragma experimental SMTChecker;
+pragma experimental ABIEncoderV2;
+
+contract C {
+	function f(uint[][] memory arr) public pure {
+		uint[][] memory arr2 = arr;
+		assert(arr2.length == arr.length);
+	}
+}

test/libsolidity/smtCheckerTests/array_members/length_assignment_memory_to_memory.sol

@@ -0,0 +1,8 @@
+pragma experimental SMTChecker;
+
+contract C {
+	function f(uint[] memory arr) public pure {
+		uint[] memory arr2 = arr;
+		assert(arr2.length == arr.length);
+	}
+}

test/libsolidity/smtCheckerTests/array_members/length_assignment_storage_to_storage.sol

@@ -0,0 +1,10 @@
+pragma experimental SMTChecker;
+
+contract C {
+	uint[] arr;
+	uint[] arr2;
+	function f() public {
+		arr2 = arr;
+		assert(arr2.length == arr.length);
+	}
+}

test/libsolidity/smtCheckerTests/array_members/length_basic.sol

@@ -0,0 +1,13 @@
+pragma experimental SMTChecker;
+
+contract C {
+	uint[] arr;
+	function f() public view {
+		uint x = arr.length;
+		uint y = x;
+		assert(arr.length == y);
+		assert(arr.length != y);
+	}
+}
+// ----
+// Warning: (153-176): Assertion violation happens here

test/libsolidity/smtCheckerTests/array_members/length_copy_memory_to_storage.sol

@@ -0,0 +1,9 @@
+pragma experimental SMTChecker;
+
+contract C {
+	uint[] arr;
+	function f(uint[] memory marr) public {
+		arr = marr;
+		assert(marr.length == arr.length);
+	}
+}

test/libsolidity/smtCheckerTests/array_members/length_copy_storage_to_memory.sol

@@ -0,0 +1,9 @@
+pragma experimental SMTChecker;
+
+contract C {
+	uint[] arr;
+	function f() public view {
+		uint[] memory marr = arr;
+		assert(marr.length == arr.length);
+	}
+}

test/libsolidity/smtCheckerTests/array_members/length_function_call.sol

@@ -0,0 +1,10 @@
+pragma experimental SMTChecker;
+
+contract C {
+	uint[] arr;
+	function f() public view {
+		assert(arr.length == g().length);
+	}
+	function g() internal pure returns (uint[] memory) {
+	}
+}

test/libsolidity/smtCheckerTests/array_members/length_same_after_assignment.sol

@@ -0,0 +1,10 @@
+pragma experimental SMTChecker;
+
+contract C {
+	uint[] arr;
+	function f() public view {
+		uint[] memory arr2 = arr;
+		arr2[2] = 3;
+		assert(arr.length == arr2.length);
+	}
+}

test/libsolidity/smtCheckerTests/array_members/length_same_after_assignment_2.sol

@@ -0,0 +1,15 @@
+pragma experimental SMTChecker;
+
+contract C {
+	uint[][] arr;
+	uint[][] arr2;
+	function f() public {
+		uint x = arr[2].length;
+		uint y = arr[3].length;
+		uint z = arr.length;
+		arr[2][333] = 444;
+		assert(arr[2].length == x);
+		assert(arr[3].length == y);
+		assert(arr.length == z);
+	}
+}

test/libsolidity/smtCheckerTests/array_members/length_same_after_assignment_2_fail.sol

@@ -0,0 +1,19 @@
+pragma experimental SMTChecker;
+
+contract C {
+	uint[][] arr;
+	uint[][] arr2;
+	function f() public {
+		uint x = arr[2].length;
+		uint y = arr[3].length;
+		uint z = arr.length;
+		arr[2][333] = 444;
+		assert(arr[2].length != x);
+		assert(arr[3].length != y);
+		assert(arr.length != z);
+	}
+}
+// ----
+// Warning: (198-224): Assertion violation happens here
+// Warning: (228-254): Assertion violation happens here
+// Warning: (258-281): Assertion violation happens here

test/libsolidity/smtCheckerTests/array_members/length_same_after_assignment_3.sol

@@ -0,0 +1,17 @@
+pragma experimental SMTChecker;
+
+contract C {
+	uint[][] arr;
+	uint[][] arr2;
+	function f() public {
+		uint x = arr[2].length;
+		uint y = arr[3].length;
+		uint z = arr.length;
+		uint t = arr[5].length;
+		arr[5] = arr[8];
+		assert(arr[2].length == x);
+		assert(arr[3].length == y);
+		assert(arr.length == z);
+		assert(arr[5].length == t);
+	}
+}

test/libsolidity/smtCheckerTests/array_members/length_same_after_assignment_3_fail.sol

@@ -0,0 +1,22 @@
+pragma experimental SMTChecker;
+
+contract C {
+	uint[][] arr;
+	uint[][] arr2;
+	function f() public {
+		uint x = arr[2].length;
+		uint y = arr[3].length;
+		uint z = arr.length;
+		uint t = arr[5].length;
+		arr[5] = arr[8];
+		assert(arr[2].length != x);
+		assert(arr[3].length != y);
+		assert(arr.length != z);
+		assert(arr[5].length != t);
+	}
+}
+// ----
+// Warning: (222-248): Assertion violation happens here
+// Warning: (252-278): Assertion violation happens here
+// Warning: (282-305): Assertion violation happens here
+// Warning: (309-335): Assertion violation happens here

test/libsolidity/smtCheckerTests/complex/MerkleProof.sol

@@ -34,9 +34,7 @@ library MerkleProof {
 }
 
 // ----
-// Warning: (755-767): Assertion checker does not yet support this expression.
 // Warning: (988-991): Assertion checker does not yet implement type abi
 // Warning: (988-1032): Assertion checker does not yet implement this type of function call.
 // Warning: (1175-1178): Assertion checker does not yet implement type abi
 // Warning: (1175-1219): Assertion checker does not yet implement this type of function call.
-// Warning: (755-767): Assertion checker does not yet support this expression.

test/libsolidity/smtCheckerTests/operators/compound_assignment_division_2.sol

@@ -10,6 +10,5 @@ contract C {
 	}
 }
 // ----
-// Warning: (163-184): Error trying to invoke SMT solver.
 // Warning: (188-209): Error trying to invoke SMT solver.
 // Warning: (188-209): Assertion violation happens here

test/libsolidity/smtCheckerTests/operators/compound_assignment_division_3.sol

@@ -10,6 +10,5 @@ contract C {
 	}
 }
 // ----
-// Warning: (171-190): Error trying to invoke SMT solver.
 // Warning: (194-213): Error trying to invoke SMT solver.
 // Warning: (194-213): Assertion violation happens here

test/libsolidity/smtCheckerTests/operators/compound_mul_array_index.sol

@@ -12,4 +12,5 @@ contract C
 	}
 }
 // ----
+// Warning: (191-212): Error trying to invoke SMT solver.
 // Warning: (191-212): Assertion violation happens here

test/libsolidity/smtCheckerTests/operators/compound_mul_mapping.sol

@@ -12,4 +12,5 @@ contract C
 	}
 }
 // ----
+// Warning: (197-216): Error trying to invoke SMT solver.
 // Warning: (197-216): Assertion violation happens here

test/libsolidity/smtCheckerTests/operators/delete_array_index_2d.sol

@@ -4,6 +4,7 @@ contract C
 {
 	uint[][] a;
 	function f(bool b) public {
+		a[1][1] = 512;
 		a[2][3] = 4;
 		if (b)
 			delete a;
@@ -16,3 +17,4 @@ contract C
 // ====
 // SMTSolvers: z3
 // ----
+// Warning: (191-211): Assertion violation happens here

test/libsolidity/smtCheckerTests/special/msg_data.sol

@@ -7,5 +7,4 @@ contract C
 	}
 }
 // ----
-// Warning: (86-101): Assertion checker does not yet support this expression.
 // Warning: (79-106): Assertion violation happens here

test/libsolidity/smtCheckerTests/types/mapping_aliasing_2.sol

@@ -30,6 +30,7 @@ contract C
 	}
 }
 // ----
+// Warning: (670-690): Error trying to invoke SMT solver.
 // Warning: (397-417): Assertion violation happens here
 // Warning: (463-481): Assertion violation happens here
 // Warning: (533-557): Assertion violation happens here

test/libsolidity/smtCheckerTests/types/string_1.sol

@@ -7,6 +7,4 @@ contract C
 	}
 }
 // ----
-// Warning: (117-133): Assertion checker does not yet support this expression.
-// Warning: (137-153): Assertion checker does not yet support this expression.
 // Warning: (110-154): Assertion violation happens here

test/libsolidity/smtCheckerTestsJSON/multi.json

@@ -3,8 +3,8 @@
 	{
 		"smtlib2responses":
 		{
-			"0x9c50514d749eabf3c13d97ad7d787e682dd99a114bad652b10a01b8c6ad6c1fb": "sat\n((|EVALEXPR_0| 1))\n",
-			"0xb524e7c577188e2e36f0e67fead51269fa0f8b8fb41bff2d973dcf584d38cd1e": "sat\n((|EVALEXPR_0| 0))\n"
+			"0x45598870c7c0bc4c4f61acad7e0dd9399fb28aa3df198379dd36a95d70814ef8": "sat\n((|EVALEXPR_0| 1))\n",
+			"0xee335f8104fdb81b6e5fb418725923b81f7d78ffbd6bf95fb82e5593a1ac366a": "sat\n((|EVALEXPR_0| 0))\n"
 		}
 	}
 }

test/libsolidity/smtCheckerTestsJSON/simple.json

@@ -3,7 +3,7 @@
 	{
 		"smtlib2responses":
 		{
-			"0x45c37a9829e623d7838d82b547d297cd446d6b5faff36c53a56862fcee50fb41": "sat\n((|EVALEXPR_0| 0))\n"
+			"0x535c76d6b87d14bd4b4bf1014d14b8e91b648f073a68f9f267c4fe1df570bc14": "sat\n((|EVALEXPR_0| 0))\n"
 		}
 	}
 }