solidity/test/libsolidity/smtCheckerTests/overflow/overflow_sum.sol

pragma experimental SMTChecker;

contract C
{
	function f(uint8 x) public pure returns (uint8) {
		uint8 y = x + 255;
		require(y >= x);
		x = 255;
		y = x + 1;
		assert(y == 0);
		y = x + 255;
		assert(y == 254);
		return y;
	}
}
// ----
// Warning 2661: (154-159): Overflow (resulting value larger than 255) happens here
// Warning 2661: (185-192): Overflow (resulting value larger than 255) happens here