Merge pull request #10836 from ethereum/smt_fix_cex_inheritance

Fix inheritance bug in CHC cex

test/libsolidity/smtCheckerTests/inheritance/base_contract_assertion_fail_1.sol

@@ -0,0 +1,18 @@
+pragma experimental SMTChecker;
+
+contract B {
+	uint x;
+	function f() public view {
+		assert(x == 0);
+	}
+}
+
+contract C is B {
+	uint y;
+	function g() public {
+		x = 1;
+		f();
+	}
+}
+// ----
+// Warning 6328: (85-99): CHC: Assertion violation happens here.\nCounterexample:\ny = 0, x = 1\n\nTransaction trace:\nC.constructor()\nState: y = 0, x = 0\nC.g()\n    B.f() -- internal call\nState: y = 0, x = 1\nB.f()

test/libsolidity/smtCheckerTests/inheritance/base_contract_assertion_fail_2.sol

@@ -0,0 +1,25 @@
+pragma experimental SMTChecker;
+
+contract A {
+	uint x;
+	function f() internal view {
+		assert(x == 0);
+	}
+}
+
+contract B is A {
+	uint a;
+	uint b;
+}
+
+contract C is B {
+	uint y;
+	uint z;
+	uint w;
+	function g() public {
+		x = 1;
+		f();
+	}
+}
+// ----
+// Warning 6328: (87-101): CHC: Assertion violation happens here.\nCounterexample:\ny = 0, z = 0, w = 0, a = 0, b = 0, x = 1\n\nTransaction trace:\nC.constructor()\nState: y = 0, z = 0, w = 0, a = 0, b = 0, x = 0\nC.g()\n    A.f() -- internal call