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Proof step 20 from proof isobj-put-index-01 (conclusion)

⊦ is_obj(r, class, st[r0 -- i ', val]) ↔ is_obj(r, class, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ is_obj(r, class, st) ↔ r ≠ jvmref ∧ (r -- _type) × typeval(mkclasstype(class)) ∈ st ∧ goodfieldsandtypes(r, instfields(class), st)
Proof step 19:
⊦ r ≠ jvmref ∧ (r -- _type) × typeval(mkclasstype(class)) ∈ st[r0 -- i ', val] ∧ goodfieldsandtypes(r, instfields(class), st[r0 -- i ', val]) ↔ is_obj(r, class, st)

Rule argument

[crewrite-arg: is_obj-def , F , [st, class, r] → [st[r0 -- i ', val], class, r] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st[r0 -- i ', val], class, r)]]