This should not typecheck, but it typechecks

[FrogOfJuly]

@Ghost("int some_other_ghost")
public class Test2 {
    int n = 0;

    @StateRefinement(from="some_other_ghost(this) > 0", to="some_other_ghost(this) < 0")
    private void f(){}

    private void shouldFail(){
        f();
        f();
    }

    public static void main(String[] args) {
        Test2 t = new Test2();
        t.shouldFail();
    }
}