contract C {
    int public x;
    int public y;

    function f() public pure {
        assert(this.x.selector != this.y.selector);
        assert(this.x.selector == this.y.selector);
    }
}
// ====
// SMTEngine: all
// ----
// Warning 6328: (142-184): CHC: Assertion violation happens here.
// Info 1391: CHC: 1 verification condition(s) proved safe! Enable the model checker option "show proved safe" to see all of them.