fact: Definition is_arrow_lit (l: literal) : bool := match l with | POS f | NEG f => is_arrow f.(elt) end.
imports: Cdcl.PatriciaR Cdcl.KeyInt Cdcl.ReifClasses Cdcl.Lib Bool Setoid ZifyBool ZArith Uint63 Lia List Cdcl.Syntax Cdcl.Clause