package msat

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type var = string
type formula = private
  1. | Prop of int
  2. | Equal of var * var
  3. | Distinct of var * var
type t = formula
type proof = unit
val dummy : t
val fresh : unit -> t
val mk_prop : int -> t
val mk_eq : var -> var -> t
val mk_neq : var -> var -> t
val neg : t -> t
val norm : t -> t * bool
val hash : t -> int
val equal : t -> t -> bool
val compare : t -> t -> int
val label : t -> Hstring.t
val add_label : Hstring.t -> t -> unit
val print : Format.formatter -> t -> unit
module Term : sig ... end
module Formula : sig ... end