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Proof step 6 from proof at-1dim-other (previous step)

sk = i ', is_indexkey(sk), i < 0 ∨ j ≤ i ⊦ (addarray(r0, ty, j, st)[r0 -- sk]) = st[r0 -- sk]

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
i < 0 ∨ j ≤ i ⊦ (addarray(r0, ty, j, st)[r0 -- i ']) = st[r0 -- i ']

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_indexkey(i ')])]]