contract C { function f(int a, int b) public pure returns (int) { return a % b; // can div by 0 } function g(bool _check) public pure returns (int) { int x = type(int).min; if (_check) { return x / -1; // can overflow } else { unchecked { return x / -1; } // overflow not reported } } } // ==== // SMTEngine: all // ---- // Warning 4281: (85-90): CHC: Division by zero happens here. // Warning 4984: (242-248): CHC: Overflow (resulting value larger than 2**255 - 1) happens here. // Info 1391: CHC: 2 verification condition(s) proved safe! Enable the model checker option "show proved safe" to see all of them.