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Proof step 8 from proof in-1dim-other (previous step)

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

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 7:
r0 -- i ' ∈ addarray(r0, ty, j, st), i < 0 ∨ j ≤ i ⊦ r0 -- i ' ∈ st

Rule argument

[emptyarg]

Additional information

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