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Proof step 2 from proof is_array-okarray-01 (
previous step
)
⊦ ¬ okarray(r, ty, st) ∧ st[r -- _type] .type = mkarraytype(ty0) ∧ ty0 ≤ ty → ¬ is_array(r, st)
Lemma
isarray-okarray-01