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Proof step 6 from proof getArray-rec-01 (previous step)

0 < j ⊦ getarray(r, i, j, st) = getarray(r, i, j - 1, st) + st[r -- (i + j - 1) '] '

Heuristic elimination applied rule insert elim lemma

And obtained the following new goals

Proof step 5:
j = i0 + 1, 0 < j ⊦ getarray(r, i, j, st) = getarray(r, i, i0, st) + st[r -- (i + j - 1) '] '

Rule argument

[speclemmaarg: ,i0 = i - j ↔ i = i0 + j ,[i, j, i0] → [j, 1, i0] ,T ,int-abs , ,elim-sub ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPELIM : ⊦ i0 = i - j ↔ i = i0 + j])], [EXTRATERMS : (j, 1, i0)]]