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Proof step 6 from proof validref-primarray (previous step)

st[r -- _type] .type = mkarraytype(ty), okarray(r, ty, st), is_primtype(ty), junkrefs(str, r ' + refs0, mkarraytype(ty), st), r ∈ st ⊦ r = jvmref

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 5:
⊦ is_primtype(ty) → (junkrefs(str, r ' + refs, mkarraytype(ty), st) ↔ r ≠ jvmref ∧ ¬ okarray(r, ty, st))

Rule argument

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

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, ty, refs0, r, str)]]