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Proof step 5 from proof isobj-put (previous step)

⊦ r = r0, is_obj(r, class, sks, st[r0 -- sk, val]) ↔ is_obj(r, class, sks, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ is_obj(r, class1, sks, st) ↔ r ≠ jvmref ∧ (r -- _type) × typeval(mkclasstype(class1)) ∈ st ∧ goodfieldsandtypes(r, sks, st)
Proof step 4:
⊦ r = r0, r ≠ jvmref ∧ (r -- _type) × typeval(mkclasstype(class)) ∈ st[r0 -- sk, val] ∧ goodfieldsandtypes(r, sks, st[r0 -- sk, val]) ↔ is_obj(r, class, sks, st)

Rule argument

[crewrite-arg: is_obj , F , [st, sks, class1, r] → [st[r0 -- sk, val], sks, class, r] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st[r0 -- sk, val], sks, class, r)]]