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Proof step 19 from proof getarray-in (previous step)

i < st[r -- _length] .intval, 0 ≤ i, 0 < st[r -- _length] .intval ⊦ ¬ # getarray(r, st) ≤ i→n(i) ∧ st[r -- n→i(i→n(i)) '] = st[r -- i ']

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 18:
i < st[r -- _length] .intval, 0 ≤ i, 0 < st[r -- _length] .intval, # getarray(r, st) ≤ i→n(i) ⊦

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ 0 ≤ i → n→i(i→n(i)) = i])]]