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Proof step 2 from proof byteval-01 (
previous step
)
⊦ 0 ≤ i + i0 ∧ i0 ≤ j ∧ i + j < st[r -- _length] .intval ∧ okarray(r, byte_type, st) → byteval(st[r -- (i + i0) '] .byteval) = st[r -- (i + i0) ']
Lemma
byteval