This should not typecheck, but it typechecks

Nobody has claimed this yet.

```
@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();
}
}
```

Use the Java snippet in the issue as the reproduction case and run LiquidJava's type checker against it. Trace why the two calls to f() are accepted despite the stated state refinement, then verify that the checker rejects this example while preserving the intended refinement behavior.

Written by the indexing model from the issue text.