pragma experimental SMTChecker; contract C { mapping (uint => uint) map; function f(uint x, uint p) public { require(x < 10); map[p] = 10; map[p] *= map[p] + x; assert(map[p] <= 190); assert(map[p] < 50); } } // ---- // Warning 6328: (197-216): CHC: Assertion violation happens here.\nCounterexample:\n\nx = 0\np = 0\n\n\nTransaction trace:\nconstructor()\nf(0, 0)