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Proof step 4 from proof newref-in (previous step)

next(maxref(st)) ∈ st, r ∈ st, maxref(st) ∈ st, ∀ r. r ∈ st → ¬ maxref(st) < r ⊦

Heuristic quantifier closing applied rule all left

And closed the goal!

Rule argument

[EXRARG : pos: left 4, [QUANTTERMLIST : (next(maxref(st)))]]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ r < next(r)])], [EXTRATERMS : (next(maxref(st)))]]