fact: Definition is_negative_literal (l:literal) := match l with | POS _ => False | NEG _ => True end.
imports: Cdcl.PatriciaR Cdcl.KeyInt Cdcl.ReifClasses Cdcl.Lib Bool Setoid ZifyBool ZArith Uint63 Lia List Cdcl.Syntax Cdcl.Clause