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Proof step 2 from proof isobj-jvmref (previous step)

is_obj(jvmref, class1, 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)

Rule argument

[crewrite-arg: is_obj , F , [st, sks, class1, r] → [st, sks, class1, jvmref] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, sks, class1, jvmref)]]