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Proof step 3 from proof arr2list-len (previous step)

m0 + 1 < # ar, ∀ ar. m0 < # ar → # arr2list(ar, m0) = m0 + 1 ⊦ # arr2list(ar, m0) = 1 + m0

Heuristic quantifier closing applied rule all left

And closed the goal!

Rule argument

[EXRARG : pos: left 2, [QUANTTERMLIST : (ar)]]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ m + n = n + m], [CSIMPSEQ : ⊦ ¬ m < n → ¬ m + m0 < n], [CSIMPSEQ : ⊦ (m + n0) + n1 = m + n0 + n1])], [EXTRATERMS : (ar)]]