solidity/test/libsolidity/smtCheckerTests/overflow/underflow_sub.sol
2023-03-09 14:59:32 +01:00

17 lines
359 B
Solidity

contract C
{
function f(uint8 x) public pure returns (uint) {
x = 0;
uint8 y;
unchecked { y = x - 1; }
assert(y == 255);
unchecked { y = x - 255; }
assert(y == 1);
return y;
}
}
// ====
// SMTEngine: all
// ----
// Info 1391: CHC: 2 verification condition(s) proved safe! Enable the model checker option "show proved safe" to see all of them.