pragma experimental SMTChecker; contract C { function f(uint x) public pure { require(x < 100); while (x < 10) { x = x + 1; } assert(x < 14); } } // ==== // SMTSolvers: z3 // ---- // Warning 6328: (139-153): CHC: Assertion violation happens here.\nCounterexample:\n\nx = 14\n\n\nTransaction trace:\nconstructor()\nf(14)