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Proof step 11 from proof validref-primarray (previous step)

st[r -- _length] = intval(i), st[r -- _type] = typeval(mkarraytype(ty0)), 0 ≤ i, r ∈ st, junkrefs(str, r ' + refs0, mkarraytype(ty0), st), is_primtype(ty), is_arrayref(r, i, st), r -- _length ∈ st, r -- _type ∈ st, ty0 ≤ ty, ∀ j. ¬ j < 0 ∧ ¬ i ≤ j → okval(st[r -- j '], ty) ⊦ ty0 = ty, r = jvmref

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 10:
⊦ ¬ has_classtype(ty) → (ty0 ≤ ty ↔ ty0 = ty)

Rule argument

[speclemmaarg: ,¬ has_classtype(ty) → (ty0 ≤ ty ↔ ty0 = ty) ,[ty, ty0] → [ty, ty0] ,F ,typefuns , ,le-hasct ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_primtype(ty) → ¬ has_classtype(ty)])], [EXTRATERMS : (ty, ty0)]]