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 < 100); array[p] = 100; array[p] += array[p] + x; assert(array[p] < 300); assert(array[p] < 110); } } // ==== // SMTEngine: all // ---- // Warning 6328: (262-284): CHC: Assertion violation happens here.\nCounterexample:\narray = [0, 200]\nx = 0\np = 1\n\nTransaction trace:\nC.constructor()\nState: array = [0, 0]\nC.f(0, 1)