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

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pragma experimental SMTChecker;
contract C
{
function f(int8 x) public pure returns (int8) {
x = 100;
int8 y = x * 2;
assert(y == -56);
y = x * 100;
assert(y == 16);
return y;
}
}
// ----
// Warning 2661: (117-122): Overflow (resulting value larger than 127) happens here
// Warning 2661: (150-157): Overflow (resulting value larger than 127) happens here