type lut_evt =
  1. | Ltop
  2. | Call
  3. | Exit
  4. | Quit
  5. | Try
  6. | Sat
  7. | Nsat
val to_lut_evt : Event.kind -> lut_evt
val from_lut_evt : lut_evt -> Event.kind
val explain_failure : Event.t -> unit

Try to hint why the current constraint failed (at fail events only)

val profiler : bool -> unit

set on/off the profiler

val reset_profiler : unit -> unit

Reset profiling info

val dump_profile_info : unit -> string

Dump profiling info

control the behavior of print_event