solidity/test/libsolidity/smtCheckerTests/overflow/overflow_sum.sol
2020-08-14 12:58:27 +02:00

19 lines
407 B
Solidity

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 4984: (154-159): Overflow (resulting value larger than 255) happens here
// Warning 4984: (185-192): Overflow (resulting value larger than 255) happens here