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Proof step 31 from proof isobj-addclass (previous step)

⊦ class = class0, is_obj(r, class, sks, addclass(class0, fis, st)) ↔ is_obj(r, class, sks, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ is_obj(r, class, sks, st) ↔ r ≠ jvmref ∧ (r -- _type) × typeval(mkclasstype(class)) ∈ st ∧ (∀ sk. sk ∈ sks → goodfieldandtype(r, sk, st))
Proof step 30:
⊦ class = class0, r ≠ jvmref ∧ (r -- _type) × typeval(mkclasstype(class)) ∈ addclass(class0, fis, st) ∧ (∀ sk. sk ∈ sks → goodfieldandtype(r, sk, addclass(class0, fis, st))) ↔ is_obj(r, class, sks, st)

Rule argument

[crewrite-arg: isobj-all , F , [st, sks, class, r] → [addclass(class0, fis, st), sks, class, r] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (addclass(class0, fis, st), sks, class, r)]]