2020-12-16 17:32:34 +00:00
|
|
|
contract test {
|
|
|
|
|
function f() public pure returns (bool) {
|
|
|
|
|
int256 x = -2**255;
|
|
|
|
|
unchecked { assert(-x == x); }
|
|
|
|
|
assert(-x == x); // CHC apparently does not create an underflow target for unary minus
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
}
|
2021-03-31 15:11:54 +00:00
|
|
|
// ====
|
|
|
|
|
// SMTEngine: all
|
2020-12-16 17:32:34 +00:00
|
|
|
// ----
|
2023-02-09 16:07:13 +00:00
|
|
|
// Warning 6328: (110-125): CHC: Assertion violation happens here.
|
|
|
|
|
// Info 1391: CHC: 1 verification condition(s) proved safe! Enable the model checker option "show proved safe" to see all of them.
|
