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Proof step 2 from proof junkrefs-newref (previous step)

newref(r, st) ⊦ junkrefs(str, refs + r ' + refs0, ty, st) ↔ junkrefs(str, refs + r ', ty, st), r = jvmref

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ ¬ r ∈ st → (junkrefs(str, refs + r ' + refs0, ty, st) ↔ junkrefs(str, refs + r ', ty, st))

Rule argument

[crewrite-arg: junkrefs-notin , F , [st, ty, refs0, r, refs, str] → [st, ty, refs0, r, refs, str] ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ r ∈ st → ¬ newref(r, st)])], [EXTRATERMS : (st, ty, refs0, r, refs, str)]]