sig
type 'a t
val pp : Format.formatter -> 'a t -> unit
val show : 'a t -> string
val closure : 'a t -> 'a Syntax.formula
val join : 'a t -> 'a t -> 'a t
val widen : 'a t -> 'a t -> 'a t
val equal : 'a t -> 'a t -> bool
val tr_symbols : 'a t -> (Syntax.symbol * Syntax.symbol) list
val abstract_iter :
?exists:(Syntax.symbol -> bool) ->
'a Syntax.context ->
'a Syntax.formula -> (Syntax.symbol * Syntax.symbol) list -> 'a t
val closure_plus : 'a t -> 'a Syntax.formula
end