fact: Variable AT_is_dec_correct : forall a, AT_is_dec a = true -> eval_atom a \/ ~ eval_atom a.
imports: Cdcl.PatriciaR Cdcl.KeyInt Cdcl.ReifClasses Cdcl.Lib Bool Setoid ZifyBool ZArith Uint63 Lia List Cdcl.Syntax Cdcl.Clause