pragma experimental SMTChecker;
contract C {
    uint x;
    modifier m(uint z) {
		uint y = 3;
        if (z >= 10)
            x = 2 + y;
        _;
        if (z >= 10)
            x = 4 + y;
    }
    function f() m(10) m(12) internal {
        x = 3;
    }
    function g() public {
        x = 0;
        f();
        assert(x == 7);
        // Fails
        assert(x == 6);
    }
}
// ----
// Warning 6328: (365-379): CHC: Assertion violation happens here.\nCounterexample:\nx = 7\n\n\n\nTransaction trace:\nconstructor()\nState: x = 0\ng()