Previously, the parser read the first statement of the goal as its
precondition, but didn’t check that it was properly terminated with a
closing parenthesis. This allowed arbitrary text to be included within
the goal description without error, which was incorrect.
This commit fixes this issue and adds a corresponding unit test.
While derived predicates stemming from the domain were already
translated, the ones from the problem were missing. This commit fixes
that, although it duplicates the definition of “contains.”
The IDs of derived predicates within problems were accidentally starting
with 1 again, colliding with the IDs of derived predicates in the
domain. With this fix, the IDs are continuously incremented, even after
switching from domain to problem.
