contract C { uint[] array; constructor() { q(); q(); } function q() public { array.push(); } function f(uint x, uint p) public { require(p < array.length); require(x == 2); array[p] = 10; array[p] /= array[p] / x; assert(array[p] == x); assert(array[p] == 0); } } // ==== // SMTEngine: all // ---- // Warning 6328: (259-280): CHC: Assertion violation happens here. // Info 1391: CHC: 8 verification condition(s) proved safe! Enable the model checker option "show proved safe" to see all of them.