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Proof step 4 from proof Comp-get (previous step)

(getarray(r1, i1, j, st)[i→n(i)]) = (getarray(r2, i2, j, st)[i→n(i)]), getarray(r1, i1, j, st) = getarray(r2, i2, j, st), 0 ≤ i, i < j, 0 < j ⊦ st[r1 -- (i1 + i) '] = st[r2 -- (i2 + i) ']

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 2:
⊦ n→i(n) < j → (getarray(r, i, j, st)[n]) = st[r -- (i + n→i(n)) ']
Proof step 3:
⊦ n→i(n) < j → (getarray(r, i, j, st)[n]) = st[r -- (i + n→i(n)) ']

Rule argument

[crewrite-arg: get-get, F, [n, st, j, i, r] → [i→n(i), st, j, i1, r1]]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ i + j = j + i], [CSIMPSEQ : ⊦ n→i(i→n(i)) = abs(i)], [CSIMPSEQ : ⊦ 0 ≤ i → abs(i) = i], [CSIMPSEQ : ⊦ ¬ i < j ↔ j ≤ i], [CSIMPSEQ : ⊦ i < j → (¬ ¬ j ≤ i ↔ false)])], [EXTRATERMS : (i→n(i), st, j, i1, r1)]]