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

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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