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Proof step 6 from proof junkref-subset (previous step)

junkrefs(str, r ' + refs1, st1[r -- _type] .type, st1), ∀ rk. rk ∈ st → rk ∈ st1 ∧ st[rk] = st1[rk] ⊦ r = jvmref, r -- _type ∈ st, junkrefs(str, r ' + refs1, noval .type, st), ∃ refs. refs ≠ [] ∧ refs .first = r ∧ junkrefs(str, refs, noval .type, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 5:
⊦ r ≠ jvmref ∧ ¬ junkrefs(str, r + refs, ty, st) → r -- _type ∈ st

Rule argument

[crewrite-arg: junkrefs-typein , F , [ty, refs, str, st, r] → [noval .type, refs1, str, st, r] ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ (refs + refs0) + refs1 = refs + refs0 + refs1], [CSIMPSEQ : ⊦ r + refs = r ' + refs])], [EXTRATERMS : (noval .type, refs1, str, st, r)]]