pragma experimental SMTChecker; contract C { uint x; modifier m { require(x > 0); require(x < 10000); _; } modifier n { x = x + 1; _; assert(x > 2); assert(x > 8); } function f() m n public { x = x + 1; } function g(uint _x) public { x = _x; } } // ---- // Warning 6328: (170-183): CHC: Assertion violation happens here.\nCounterexample:\nx = 3\n\n\n\nTransaction trace:\nconstructor()\nState: x = 0\ng(1)\nState: x = 1\nf()