fact: Definition is_empty {A: Type} (m: IntMap.ptrie (key:=int) A) := match m with | IntMap.Leaf _ _ _ => true | _ => false end.
imports: Cdcl.PatriciaR Cdcl.KeyInt Cdcl.ReifClasses Cdcl.Lib Bool Setoid ZifyBool ZArith Uint63 Lia List Cdcl.Syntax Cdcl.Clause