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Proof step 11 from proof getarray-in (previous step)

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

User applied rule exists right

And obtained the following new goals

Proof step 10:
n < i→n(st[r -- _length] .intval), 0 < st[r -- _length] .intval ⊦ getarray(r, st) = [], st[r -- _length] .intval = 0, ¬ n→i(n) < 0 ∧ ¬ st[r -- _length] .intval ≤ n→i(n) ∧ st[r -- n→i(n) '] = st[r -- n→i(n) ']

Rule argument

[EXRARG : pos: right 3, [extquanttermlist: (n→i(n))abort:F, discard:T, computed:T]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (n→i(n))]]