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Proof step 34 from proof completeness (previous step)

〈build_rec#(0; x, to)〉 (x = [] ∧ to = fail), x = depths(t, 0), 0 ≤ max(depths(t, 0)), ∀ t0, x1. depths(t, 0) ≠ depths(t0, 0) + x1 ⊦

User applied rule all left

And closed the goal!

Rule argument

[EXRARG : pos: left 4, [extquanttermlist: (t, [])abort:F, discard:T, computed:F]]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ x + [] = x], [CSIMPSEQ : ⊦ (x + y) + z = x + y + z])], [EXTRATERMS : (t, [])]]