(** Syntactic size of the formula *)
val eval_form : (StateSet.t * StateSet.t) -> t -> bool
-(** [eval_form sf,sn F] evaluates the formula [F] on [(sf,sn)] *)
+(** [eval_form (sf,sn) F] evaluates the formula [F] on [(sf,sn)] *)
val infer_form : (StateSet.t * StateSet.t) -> (StateSet.t * StateSet.t) -> t -> bool
(** [eval_form S1 S2 F] infers S1; S2 |- F *)