fact: Variable (Σ : fo_signature) (ls : list (syms Σ)) (lr : list (rels Σ)) (X : Type) (M : fo_model Σ X).
imports: List Arith Lia Undecidability.Shared.Libs.DLW.Utils(utils_tac utils_list finite) Undecidability.Shared.Libs.DLW.Vec(pos vec) Undecidability.FOL.TRAKHTENBROT(notations utils fol_ops fo_sig fo_terms fo_logic)