pragma experimental SMTChecker;

contract C
{
	function f() public payable {
		assert(msg.data.length > 0);
		// Fails since calldata size should be 4
		assert(msg.data.length > 4);
		// f's sig is 0x26121ff0
		assert(msg.data[0] == 0x26);
		assert(msg.data[1] == 0x12);
		assert(msg.data[2] == 0x1f);
		assert(msg.data[3] == 0xf0);
	}
	function g() public payable {
		// g's sig is 0xe2179b8e
		assert(msg.data[0] == 0xe2);
		assert(msg.data[1] == 0x17);
		assert(msg.data[2] == 0x9b);
		// Fails
		assert(msg.data[3] == 0x8f);
	}
}
// ----
// Warning 6328: (153-180): CHC: Assertion violation happens here.\nCounterexample:\n\n\n\n\nTransaction trace:\nC.constructor()\nC.f()
// Warning 6328: (500-527): CHC: Assertion violation happens here.\nCounterexample:\n\n\n\n\nTransaction trace:\nC.constructor()\nC.g()