solidity/test/libsolidity/smtCheckerTests/array_members/length_basic.sol

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 6328: (153-176): CHC: Assertion violation happens here.\nCounterexample:\narr = []\nx = 0\ny = 0\n\nTransaction trace:\nC.constructor()\nState: arr = []\nC.f()