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Proof step 7 from proof addclass-validFields (previous step)

r -- sk ∈ addclass(class, fis0, st), sk ∈ fis .keys, unique_al(fis), r ∈ st, ∀ sk. sk ∈ fis .keys → r -- sk ∈ addclass(class, fis0, st) ⊦ r = jvmref, r -- sk ∈ st, _length ∈ fis, _type ∈ fis

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 6:
r ≠ jvmref ⊦ r -- sk ∈ addclass(class1, fis, st) ↔ r -- sk ∈ st

Rule argument

[crewrite-arg: ac-in-03-02 , F , [st, fis, class1, sk, r] → [st, fis0, class, sk, r] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, fis0, class, sk, r)]]