fact: Definition is_fail {A B: Type} (p : result A B) : Prop := match p with | Fail _ => True | _ => False end.
imports: Cdcl.PatriciaR Cdcl.KeyInt Cdcl.ReifClasses Cdcl.Lib Bool Setoid ZifyBool ZArith Uint63 Lia List Cdcl.Syntax Cdcl.Clause