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Proof step 14 from proof getarray-in (previous step)

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

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 13:
n < # getarray(r, st) ⊦ getarray(r, st) = [], ∃ i. ¬ i < 0 ∧ ¬ st[r -- _length] .intval ≤ i ∧ st[r -- i '] = st[r -- n→i(n) ']

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ # vals = 0 ↔ vals = []], [CSIMPFORWARD : ⊦ m < n → n ≠ 0])]]