The code conforms to the specification. It's not buggy. The specification does not conform to the user's expectations or documentation. It's flawed. Theorem p

The code conforms to the specification. It's not buggy. The specification does not conform to the user's expectations or documentation. It's flawed. Theorem provers can only prove that the code conforms to the specification, not to the user's expectations or documentation. They can be very helpful, but they aren't magic and can't interpret non-formal specifications.