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Proof step 6 from proof getbar-restn-02 (previous step)

n→i(n) ≤ st[r -- _length] .intval ⊦ # restn(n, getbytearray(r, 0, st[r -- _length] .intval, st)) = i→n(st[r -- _length] .intval - n→i(n))

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 2:
⊦ n→i(n) ≤ j ∧ 0 ≤ i → restn(n, getbytearray(r, i, j, st)) = getbytearray(r, i + n→i(n), j - n→i(n), st)
Proof step 5:
n→i(n) ≤ st[r -- _length] .intval ∧ 0 ≤ 0, n→i(n) ≤ st[r -- _length] .intval ⊦ # getbytearray(r, 0 + n→i(n), st[r -- _length] .intval - n→i(n), st) = i→n(st[r -- _length] .intval - n→i(n))

Rule argument

[crewrite-arg: bar-restn , F , [st, j, i, r, n] → [st, st[r -- _length] .intval, 0, r, n] ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ i ≤ j ↔ j < i], [CSIMPSEQ : ⊦ i ≤ j → (¬ ¬ j < i ↔ false)])], [EXTRATERMS : (st, st[r -- _length] .intval, 0, r, n)]]