fact: Fixpoint Acc_RA_of B (f : B -> A) b (ac : Acc RA (f b)) : Acc (fun x y => RA (f x) (f y)) b.
imports: Coq.Setoids.Setoid Coq.Program.Program Coq.Program.Wf Coq.Arith.Wf_nat Coq.Classes.Morphisms Coq.Init.Wf Coq.Lists.SetoidList Coq.Arith.PeanoNat Fiat.Common.Coq__8_4__8_5__Compat