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Theorem multi-isarrayref-notin

⊦ ¬ r ∈ refs ∧ # refs = i→n(countrefs(i ' + ints .rest)) ∧ ints ≠ [] ∧ 0 ≤ i ∧ posints(ints) ∧ ¬ 0 ∈ ints .butlast ∧ i ≤ ints .first → (is_arrayref(r, j, addmultiarrays(refs, i, acc, ty, ints, st)) ↔ is_arrayref(r, j, st))

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