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Proof step 20 from proof newrefs-two (previous step)

⊦ newref(newref(st[newref(st) -- 0 ', noval]), st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 5:
⊦ newref(r, st) ↔ r ≠ jvmref ∧ ¬ r ∈ st
Proof step 19:
⊦ newref(st[newref(st) -- 0 ', noval]) ≠ jvmref ∧ ¬ newref(st[newref(st) -- 0 ', noval]) ∈ st

Rule argument

[crewrite-arg: newref-def , F , [st, r] → [st, newref(st[newref(st) -- 0 ', noval])] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, newref(st[newref(st) -- 0 ', noval]))]]