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Proof step 9 from proof isobj-addclass (previous step)

st[r -- _type] = typeval(mkclasstype(class)), okval(noval, ty), r -- mkfs(class1, ty, fieldvar) ' ∈ addclass(class0, fis, st), r ∈ st, r -- _type ∈ st, mkfs(class1, ty, fieldvar) ' ∈ sks ⊦ class = class0, r = jvmref, r -- mkfs(class1, ty, fieldvar) ' ∈ st

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 8:
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, fis, class0, mkfs(class1, ty, fieldvar) ', r] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, fis, class0, mkfs(class1, ty, fieldvar) ', r)]]