fact: Variable (X : Type) (M : fo_model Σ X) (M1 : finite_t X) (M2 : fo_model_dec M).
imports: List Arith Bool Lia Eqdep_dec Max Undecidability.Shared.Libs.DLW.Utils(utils_tac utils_list utils_nat finite) Undecidability.Shared.Libs.DLW.Vec(pos vec) Undecidability.FOL.TRAKHTENBROT(notations utils decidable fol_ops fo_sig fo_terms fo_logic fo_sat)