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Proof step 10 from proof getbar-restn (previous step)

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

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 8:
⊦ ¬ st[r -- _length] .intval < 0 → # getbytearray(r, st) = i→n(st[r -- _length] .intval)
Proof step 9:
⊦ 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) = 0 ↔ i = 0], [CSIMPSEQ : ⊦ m ≤ 0 ↔ m = 0], [CSIMPFORWARD : ⊦ j < i ∧ i ≤ 0 → j < 0], [CSIMPFORWARD : ⊦ i ≤ j ∧ j < j0 → i < j0])], [EXTRATERMS : (st, r)]]