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Proof step 4 from proof getbar-restn (previous step)

# getbytearray(r, st) < n, n→i(n) ≤ st[r -- _length] .intval ⊦ # restn(n, getbytearray(r, 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:
⊦ ¬ st[r -- _length] .intval < 0 → # getbytearray(r, st) = i→n(st[r -- _length] .intval)
Proof step 3:
⊦ st[r -- _length] .intval < 0 → # getbytearray(r, st) = 0

Rule argument

[crewrite-arg: bar-length, F, [st, r] → [st, r]]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ i→n(i) < n → ¬ n→i(n) ≤ i], [CSIMPSEQ : ⊦ 0 < n ↔ n ≠ 0], [CSIMPFORWARD : ⊦ j < i ∧ i ≤ 0 → j < 0], [CSIMPFORWARD : ⊦ i ≤ j ∧ j < j0 → i < j0], [CSIMPSEQ : ⊦ ¬ n→i(n) < 0])], [EXTRATERMS : (st, r)]]