controller_itp.ml 42.7 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11
(********************************************************************)
(*                                                                  *)
(*  The Why3 Verification Platform   /   The Why3 Development Team  *)
(*  Copyright 2010-2017   --   INRIA - CNRS - Paris-Sud University  *)
(*                                                                  *)
(*  This software is distributed under the terms of the GNU Lesser  *)
(*  General Public License version 2.1, with the special exception  *)
(*  on linking described in file LICENSE.                           *)
(*                                                                  *)
(********************************************************************)

12
open Format
Clément Fumex's avatar
Clément Fumex committed
13 14
open Session_itp

Sylvain Dailler's avatar
Sylvain Dailler committed
15 16 17 18
let debug_sched = Debug.register_info_flag "scheduler"
  ~desc:"Print@ debugging@ messages@ about@ scheduling@ of@ prover@ calls@ \
         and@ transformation@ applications."

Sylvain Dailler's avatar
Sylvain Dailler committed
19
let debug_call_prover = Debug.lookup_flag "call_prover"
20 21
let default_delay_ms = 100 (* 0.1 seconds *)

Sylvain Dailler's avatar
Sylvain Dailler committed
22

23 24
exception Noprogress

25 26 27
let () = Exn_printer.register
    (fun fmt e ->
      match e with
Sylvain Dailler's avatar
Sylvain Dailler committed
28 29
      | Noprogress ->
          Format.fprintf fmt "The transformation made no progress.\n"
30 31
      | _ -> raise e)

Clément Fumex's avatar
Clément Fumex committed
32 33
(** State of a proof *)
type proof_attempt_status =
34
  | Undone   (** prover was never called *)
35 36 37
  | Scheduled (** external proof attempt is scheduled *)
  | Running (** external proof attempt is in progress *)
  | Done of Call_provers.prover_result (** external proof done *)
38 39
  | Interrupted (** external proof has never completed *)
  | Detached (** parent goal has no task, is detached *)
40 41
  | InternalFailure of exn (** external proof aborted by internal error *)
  | Uninstalled of Whyconf.prover (** prover is uninstalled *)
42
  | UpgradeProver of Whyconf.prover (** prover is upgraded *)
Clément Fumex's avatar
Clément Fumex committed
43

MARCHE Claude's avatar
MARCHE Claude committed
44 45
let print_status fmt st =
  match st with
46
  | Undone            -> fprintf fmt "Undone"
Sylvain Dailler's avatar
Sylvain Dailler committed
47 48 49 50
  | Scheduled         -> fprintf fmt "Scheduled"
  | Running           -> fprintf fmt "Running"
  | Done r            ->
      fprintf fmt "Done(%a)" Call_provers.print_prover_result r
51 52
  | Interrupted       -> fprintf fmt "Interrupted"
  | Detached          -> fprintf fmt "Detached"
Sylvain Dailler's avatar
Sylvain Dailler committed
53 54 55 56
  | InternalFailure e ->
      fprintf fmt "InternalFailure(%a)" Exn_printer.exn_printer e
  | Uninstalled pr    ->
      fprintf fmt "Prover %a is uninstalled" Whyconf.print_prover pr
57 58
  | UpgradeProver pr    ->
      fprintf fmt "Prover upgrade to %a" Whyconf.print_prover pr
MARCHE Claude's avatar
MARCHE Claude committed
59 60

type transformation_status =
61
  | TSscheduled | TSdone of transID | TSfailed of (proofNodeID * exn)
62 63 64 65

let print_trans_status fmt st =
  match st with
  | TSscheduled -> fprintf fmt "TScheduled"
66
  | TSdone _tid -> fprintf fmt "TSdone" (* TODO print tid *)
67
  | TSfailed _e -> fprintf fmt "TSfailed"
Clément Fumex's avatar
Clément Fumex committed
68

69 70 71 72
type strategy_status = STSgoto of proofNodeID * int | STShalt

let print_strategy_status fmt st =
  match st with
Sylvain Dailler's avatar
Sylvain Dailler committed
73 74
  | STSgoto(id,n) ->
      fprintf fmt "goto step %d in proofNode %a" n print_proofNodeID id
75 76 77
  | STShalt -> fprintf fmt "halt"


78
type controller =
Sylvain Dailler's avatar
Sylvain Dailler committed
79
  { mutable controller_session: Session_itp.session;
80
    controller_config : Whyconf.config;
Sylvain Dailler's avatar
Sylvain Dailler committed
81 82 83
    controller_env: Env.env;
    controller_provers:
      (Whyconf.config_prover * Driver.driver) Whyconf.Hprover.t;
84
    controller_strategies : (string * string * Strategy.instruction array) Stdlib.Hstr.t;
85
    controller_running_proof_attempts : unit Hpan.t;
86 87
  }

88 89 90 91 92
let session_max_tasks = ref 1

let set_session_max_tasks n =
  session_max_tasks := n;
  Prove_client.set_max_running_provers n
93

94
let create_controller config env ses =
95 96
  let c =
    {
97
      controller_session = ses;
98 99 100
      controller_config = config;
      controller_env = env;
      controller_provers = Whyconf.Hprover.create 7;
101
      controller_strategies = Stdlib.Hstr.create 7;
102
      controller_running_proof_attempts = Hpan.create 17;
103 104 105 106 107 108
    }
  in
  let provers = Whyconf.get_provers config in
  Whyconf.Mprover.iter
    (fun _ p ->
     try
109
       let d = Whyconf.load_driver (Whyconf.get_main config) env p.Whyconf.driver [] in
110 111
       Whyconf.Hprover.add c.controller_provers p.Whyconf.prover (p,d)
     with e ->
Sylvain Dailler's avatar
Sylvain Dailler committed
112
       Debug.dprintf debug_call_prover
113 114 115 116 117 118
         "[Controller_itp] error while loading driver for prover %a: %a@."
         Whyconf.print_prover p.Whyconf.prover
         Exn_printer.exn_printer e)
    provers;
  c

119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139

(* Cannot remove a proof_attempt that was scheduled but did not finish yet.
   It can be interrupted though. *)
let removable_proof_attempt c pa =
  try let () = Hpan.find c.controller_running_proof_attempts pa in false
  with Not_found -> true

let any_removable c any =
  match any with
  | APa pa -> removable_proof_attempt c pa
  | _ -> true

(* Check whether the subtree [n] contains an unremovable proof_attempt
   (ie: scheduled or running) *)
let check_removable c (n: any) =
  fold_all_any c.controller_session (fun acc any -> acc && any_removable c any) true n


let remove_subtree ~(notification:notifier) ~(removed:notifier) c (n: any) =
  if check_removable c n then
    Session_itp.remove_subtree ~notification ~removed c.controller_session n
140

141 142 143
(* Get children of any without proofattempts *)
let get_undetached_children_no_pa s any : any list =
  match any with
144
  | AFile f -> List.map (fun th -> ATh th) (file_theories f)
145 146 147
  | ATh th  -> List.map (fun g -> APn g) (theory_goals th)
  | ATn tn  -> List.map (fun pn -> APn pn) (get_sub_tasks s tn)
  | APn pn  -> List.map (fun tn -> ATn tn) (get_transformations s pn)
Sylvain Dailler's avatar
Sylvain Dailler committed
148
  | APa _ -> []
149

150 151


152 153 154 155 156 157 158 159 160 161 162 163
(* printing *)

module PSession = struct

  open Stdlib

  type any =
    | Session
    | File of file
    | Theory of theory
    | Goal of proofNodeID
    | Transf of transID
164
    | ProofAttempt of proof_attempt_node
165 166 167 168 169 170 171 172 173 174

  type 'a t = { tcont : controller;
                tkind : any }

  let decomp x =
    let s = x.tcont.controller_session in
    let n y acc = { x with tkind = y } :: acc in
    match x.tkind with
    | Session -> "", Hstr.fold (fun _ f -> n (File f)) (get_files s) []
    | File f ->
175
       (file_name f),
176
       List.fold_right (fun th -> n (Theory th)) (file_theories f) []
177 178 179
    | Theory th ->
       let id = theory_name th in
       let name = id.Ident.id_string in
180
       let name = if th_proved s th then name^"!" else name^"?" in
181
       name,
Sylvain Dailler's avatar
Sylvain Dailler committed
182 183 184 185
       List.fold_right
         (fun g -> n (Goal g))
         (theory_goals th)
         (List.fold_right (fun g -> n (Goal g)) (theory_detached_goals th) [])
186 187 188
    | Goal id ->
       let gid = get_proof_name s id in
       let name = gid.Ident.id_string in
189
       let name = if pn_proved s id then name^"!" else name^"?" in
190 191 192 193 194 195 196
       let pas = get_proof_attempts s id in
       let trs = get_transformations s id in
       name,
       List.fold_right (fun g -> n (Transf g)) trs
                       (List.fold_right (fun g -> n (ProofAttempt g)) pas [])
    | ProofAttempt pa ->
       Pp.sprintf_wnl "%a%s%s"
Sylvain Dailler's avatar
Sylvain Dailler committed
197 198 199 200 201
          Whyconf.print_prover pa.prover
          (match pa.Session_itp.proof_state with
          | Some { Call_provers.pr_answer = Call_provers.Valid} -> ""
          | _ -> "?")
          (if pa.proof_obsolete then "O" else ""), []
202 203
    | Transf id ->
       let name = get_transf_name s id in
204
       let name = if tn_proved s id then name^"!" else name^"?" in
205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221
       let sts = get_sub_tasks s id in
       let dsts = get_detached_sub_tasks s id in
       name,
       List.fold_right (fun g -> n (Goal g)) sts
                       (List.fold_right (fun g -> n (Goal g)) dsts [])

end

module P = Print_tree.PMake(PSession)

let print_session fmt c =
  P.print fmt { PSession.tcont = c; PSession.tkind = PSession.Session }

(*********)



222 223 224 225 226 227

(** reload files, associating old proof attempts and transformations
    to the new goals.  old theories and old goals for which we cannot
    find a corresponding new theory resp. old goal are kept, with
    tasks associated to them *)

228
let reload_files (c : controller) ~use_shapes =
229
  let old_ses = c.controller_session in
230
  c.controller_session <- empty_session ~from:old_ses (get_dir old_ses);
231
  try
232
    merge_files ~use_shapes c.controller_env c.controller_session old_ses
233 234 235
  with e ->
    c.controller_session <- old_ses;
    raise e
236 237

let add_file c ?format fname =
238 239 240
  let theories = Session_itp.read_file c.controller_env ?format fname in
  let (_ : file) = add_file_section c.controller_session fname theories format in
  ()
241

242 243

module type Scheduler = sig
244
  val blocking: bool
245
  val multiplier: int
246 247 248 249
  val timeout: ms:int -> (unit -> bool) -> unit
  val idle: prio:int -> (unit -> bool) -> unit
end

250 251
module Make(S : Scheduler) = struct

MARCHE Claude's avatar
MARCHE Claude committed
252 253
let scheduled_proof_attempts = Queue.create ()

254 255 256 257 258 259
let prover_tasks_in_progress = Hashtbl.create 17

(* We need to separate tasks that are edited from proofattempt in progress
   because we are not using why3server for the edited proofs and timeout_handler
   rely on a loop on why3server's results. *)
let prover_tasks_edited = Queue.create ()
MARCHE Claude's avatar
MARCHE Claude committed
260 261 262

let timeout_handler_running = ref false

263

MARCHE Claude's avatar
MARCHE Claude committed
264
let number_of_running_provers = ref 0
265

266 267 268 269
let observer = ref (fun _ _ _ -> ())

let register_observer = (:=) observer

270
module Hprover = Whyconf.Hprover
MARCHE Claude's avatar
MARCHE Claude committed
271

272 273 274 275 276 277 278 279 280 281 282 283 284
(* calling provers, with limits adaptation

 *)


(* to avoid corner cases when prover results are obtained very closely
   to the time or mem limits, we adapt these limits when we replay a
   proof *)

let adapt_limits ~interactive ~use_steps limits a =
  let t, m, s =
    let timelimit = limits.Call_provers.limit_time in
    let memlimit = limits.Call_provers.limit_mem in
285
    let steplimit = limits.Call_provers.limit_steps in
286 287 288 289 290 291 292 293
    match a.proof_state with
    | Some { Call_provers.pr_answer = r;
             Call_provers.pr_time = t;
             Call_provers.pr_steps = s } ->
       (* increased time limit is 1 + twice the previous running time,
       but enforced to remain inside the interval [l,2l] where l is
       the previous time limit *)
       let t = truncate (1.0 +. 2.0 *. t) in
294
       let increased_time = if interactive then 0
295 296 297 298 299
                            else max timelimit (min t (2 * timelimit)) in
       (* increased mem limit is just 1.5 times the previous mem limit *)
       let increased_mem = if interactive then 0 else 3 * memlimit / 2 in
       begin
         match r with
300 301
         | Call_provers.OutOfMemory -> increased_time, memlimit, steplimit
         | Call_provers.Timeout -> timelimit, increased_mem, steplimit
302 303
         | Call_provers.Valid ->
            let steplimit =
304 305 306 307 308 309 310 311 312
              if use_steps && not a.proof_obsolete then
                (* We need to allow at least one more step than what was used to
                   prove the same statement. Otherwise, the prover run out of
                   steps: this happens with cvc4 on some very fast proofs
                   (steps = 28).
                *)
                s + 1
              else
                0
313 314 315 316
            in
            increased_time, increased_mem, steplimit
         | Call_provers.Unknown _
         | Call_provers.StepLimitExceeded
317
         | Call_provers.Invalid -> increased_time, increased_mem, steplimit
318 319 320
         | Call_provers.Failure _
         | Call_provers.HighFailure ->
            (* correct ? failures are supposed to appear quickly anyway... *)
321
            timelimit, memlimit, steplimit
322 323
       end
    | None when interactive -> 0, 0, 0
324
    | None -> timelimit, memlimit, steplimit
325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346
  in
  { Call_provers.limit_time = t; limit_mem = m; limit_steps = s }

let group_answer a =
  match a with
  | Call_provers.OutOfMemory
  | Call_provers.Unknown _
  | Call_provers.Timeout -> Call_provers.Timeout
  | _ -> a

let fuzzy_proof_time nres ores =
  let ansold = ores.Call_provers.pr_answer in
  let told = ores.Call_provers.pr_time in
  let ansnew = nres.Call_provers.pr_answer in
  let tnew = nres.Call_provers.pr_time in
  if group_answer ansold = group_answer ansnew &&
       tnew >= told *. 0.9 -. 0.1 && tnew <= told *. 1.1 +. 0.1
  then { nres with Call_provers.pr_time = told }
  else nres


let build_prover_call ?proof_script ~cntexample c id pr limit callback ores =
347
  let (config_pr,driver) = Hprover.find c.controller_provers pr in
348
  let with_steps = Call_provers.(limit.limit_steps <> empty_limit.limit_steps) in
349
  let command =
350
    Whyconf.get_complete_command config_pr ~with_steps in
351 352
  try
    let task = Session_itp.get_raw_task c.controller_session id in
353 354 355
    Debug.dprintf debug_sched "[build_prover_call] Script file = %a@."
                  (Pp.print_option Pp.string) proof_script;
    let inplace = config_pr.Whyconf.in_place in
356 357 358 359 360 361 362 363 364
    try
      let call =
        Driver.prove_task ?old:proof_script ~cntexample:cntexample ~inplace ~command
                          ~limit driver task
      in
      let pa = (c.controller_session,id,pr,callback,false,call,ores) in
      Hashtbl.replace prover_tasks_in_progress call pa
    with Sys_error _ as e ->
      callback (InternalFailure e)
365 366
  with Not_found (* goal has no task, it is detached *) ->
       callback Detached
MARCHE Claude's avatar
MARCHE Claude committed
367

368 369
let update_observer () =
  let scheduled = Queue.length scheduled_proof_attempts in
370
  let waiting_or_running = Hashtbl.length prover_tasks_in_progress in
371 372 373
  let running = !number_of_running_provers in
  !observer scheduled (waiting_or_running - running) running

MARCHE Claude's avatar
MARCHE Claude committed
374 375
let timeout_handler () =
  (* examine all the prover tasks in progress *)
376 377 378
  (* When no tasks are there, probably no tasks were scheduled and the server
     was not launched so getting results could fail. *)
  if Hashtbl.length prover_tasks_in_progress != 0 then begin
379
    let results = Call_provers.get_new_results ~blocking:S.blocking in
380 381 382 383
    List.iter (fun (call, prover_update) ->
      match Hashtbl.find prover_tasks_in_progress call with
      | (ses,id,pr,callback,started,call,ores) ->
        begin match prover_update with
384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406
        | Call_provers.NoUpdates -> ()
        | Call_provers.ProverStarted ->
            assert (not started);
            callback Running;
            incr number_of_running_provers;
            Hashtbl.replace prover_tasks_in_progress call
              (ses,id,pr,callback,true,call,ores)
        | Call_provers.ProverFinished res ->
            Hashtbl.remove prover_tasks_in_progress call;
            if started then decr number_of_running_provers;
            let res = Opt.fold fuzzy_proof_time res ores in
            (* inform the callback *)
            callback (Done res)
        | Call_provers.ProverInterrupted ->
            Hashtbl.remove prover_tasks_in_progress call;
            if started then decr number_of_running_provers;
            (* inform the callback *)
            callback (Interrupted)
        | Call_provers.InternalFailure exn ->
            Hashtbl.remove prover_tasks_in_progress call;
            if started then decr number_of_running_provers;
            (* inform the callback *)
            callback (InternalFailure (exn))
407 408 409 410 411 412
        end
      | exception Not_found -> ()
        (* We probably received ProverStarted after ProverFinished,
           because what is sent to and received from the server is
           not ordered. *)
    ) results;
413 414
  end;

415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434
  (* When blocking is activated, we are in script mode and we don't want editors
     to be launched so we don't need to go in this loop. *)
  if not S.blocking then begin
    (* Check for editor calls which are not finished *)
    let q = Queue.create () in
    while not (Queue.is_empty prover_tasks_edited) do
      (* call is an EditorCall *)
      let (_ses,_id,_pr,callback,_started,call,ores) as c =
        Queue.pop prover_tasks_edited in
      let prover_update = Call_provers.query_call call in
      match prover_update with
      | Call_provers.NoUpdates -> Queue.add c q
      | Call_provers.ProverFinished res ->
          let res = Opt.fold fuzzy_proof_time res ores in
          (* inform the callback *)
          callback (Done res)
      | _ -> assert (false) (* An edition can only return Noupdates or finished *)
    done;
    Queue.transfer q prover_tasks_edited;
  end;
435 436

  (* if the number of prover tasks is less than S.multiplier times the maximum
MARCHE Claude's avatar
MARCHE Claude committed
437 438
     number of running provers, then we heuristically decide to add
     more tasks *)
439 440
  begin
    try
441
      for _i = Hashtbl.length prover_tasks_in_progress
442
          to S.multiplier * !session_max_tasks do
443 444
        let (c,id,pr,limit,proof_script,callback,cntexample,ores) =
          Queue.pop scheduled_proof_attempts in
445
        try
446
          build_prover_call ?proof_script ~cntexample c id pr limit callback ores
447 448 449 450 451
        with e when not (Debug.test_flag Debug.stack_trace) ->
          callback (InternalFailure e)
      done
  with Queue.Empty -> ()
  end;
452
  update_observer ();
453
  true
MARCHE Claude's avatar
MARCHE Claude committed
454

455
let interrupt () =
456 457 458 459 460 461 462
  (* Interrupt provers *)
  Hashtbl.iter (fun _k e ->
    let (_, _, _, callback, _, _, _) = e in callback Interrupted)
    prover_tasks_in_progress;
  Hashtbl.clear prover_tasks_in_progress;
  (* Do not interrupt editors
  while not (Queue.is_empty prover_tasks_edited) do
463
    let (_ses,_id,_pr,callback,_started,_call,_ores) =
464
      Queue.pop prover_tasks_edited in
465 466
    callback Interrupted
  done;
467
  *)
468 469
  number_of_running_provers := 0;
  while not (Queue.is_empty scheduled_proof_attempts) do
470 471
    let (_c,_id,_pr,_limit,_proof_script,callback,_cntexample,_ores) =
      Queue.pop scheduled_proof_attempts in
472 473 474 475
    callback Interrupted
  done;
  !observer 0 0 0

MARCHE Claude's avatar
MARCHE Claude committed
476 477 478 479
let run_timeout_handler () =
  if not !timeout_handler_running then
    begin
      timeout_handler_running := true;
480
      S.timeout ~ms:default_delay_ms timeout_handler;
MARCHE Claude's avatar
MARCHE Claude committed
481 482
    end

483 484 485 486
let schedule_proof_attempt c id pr
                           ~counterexmp ~limit ~callback ~notification =
  let ses = c.controller_session in
  let callback panid s =
487 488
    begin
      match s with
489
      | UpgradeProver _ -> ()
490 491 492 493 494 495 496 497
      | Scheduled ->
         Hpan.add c.controller_running_proof_attempts panid ();
         update_goal_node notification ses id
      | Running -> update_goal_node notification ses id
      | Done res ->
         Hpan.remove c.controller_running_proof_attempts panid;
         update_proof_attempt ~obsolete:false notification ses id pr res;
         update_goal_node notification ses id
498 499
      | Interrupted
      | InternalFailure _ ->
500 501 502 503 504
         Hpan.remove c.controller_running_proof_attempts panid;
         (* what to do ?
         update_proof_attempt ~obsolete:false notification ses id pr res;
          *)
         update_goal_node notification ses id
505 506
      | Detached -> assert false
      | Uninstalled _ -> assert false
507
      | Undone -> assert false
508
    end;
509 510 511
    callback panid s
  in
  let adaptlimit,ores,proof_script =
512
    try
513
      let h = get_proof_attempt_ids ses id in
514
      let pa = Hprover.find h pr in
515
      let a = get_proof_attempt_node ses pa in
516 517 518 519 520
      let old_res = a.proof_state in
      let config_pr,_ = Hprover.find c.controller_provers pr in
      let interactive = config_pr.Whyconf.interactive in
      let use_steps = Call_provers.(limit.limit_steps <> empty_limit.limit_steps) in
      let limit = adapt_limits ~interactive ~use_steps limit a in
521 522 523 524 525 526
      let script = Opt.map (fun s ->
                            Debug.dprintf debug_sched "Script file = %s@." s;
                            Filename.concat (get_dir ses) s) a.proof_script
      in
      limit, old_res, script
    with Not_found | Session_itp.BadID -> limit,None,None
527
  in
528
  let panid = graft_proof_attempt ~limit ses id pr in
529
  Queue.add (c,id,pr,adaptlimit,proof_script,callback panid,counterexmp,ores)
530
            scheduled_proof_attempts;
531
  callback panid Scheduled;
MARCHE Claude's avatar
MARCHE Claude committed
532
  run_timeout_handler ()
Clément Fumex's avatar
Clément Fumex committed
533

534

535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571

(* replay *)


let find_prover notification c goal_id pr =
  if Hprover.mem c.controller_provers pr then Some pr else
   match Whyconf.get_prover_upgrade_policy c.controller_config pr with
   | exception Not_found -> None
   | Whyconf.CPU_keep -> None
   | Whyconf.CPU_upgrade new_pr ->
      (* does a proof using new_pr already exists ? *)
      if Hprover.mem (get_proof_attempt_ids c.controller_session goal_id) new_pr
      then (* yes, then we do nothing *)
        None
      else
        begin
          (* we modify the prover in-place *)
          Session_itp.change_prover notification c.controller_session goal_id pr new_pr;
          Some new_pr
        end
   | Whyconf.CPU_duplicate _new_pr ->
      assert false (* TODO *)
(*
      (* does a proof using new_p already exists ? *)
      if Hprover.mem (goal_external_proofs parid) new_pr
      then (* yes, then we do nothing *)
        None
      else
        begin
          (* we duplicate the proof_attempt *)
          let new_a = copy_external_proof
                        ~notify ~keygen:O.create ~prover:new_p ~env_session:eS a
          in
          Some new_pr
        end
*)

572
let replay_proof_attempt c pr limit (parid: proofNodeID) id ~callback ~notification =
573 574 575 576
  (* The replay can be done on a different machine so we need
     to check more things before giving the attempt to the scheduler *)
  match find_prover notification c parid pr with
  | None -> callback id (Uninstalled pr)
577
  | Some pr' ->
578
     try
579
       if pr' <> pr then callback id (UpgradeProver pr');
580
       let _ = get_raw_task c.controller_session parid in
581
       schedule_proof_attempt c parid pr' ~counterexmp:false ~limit ~callback ~notification
582 583
     with Not_found ->
       callback id Detached
584 585


586 587
(*** { 2 edition of proof scripts} *)

Sylvain Dailler's avatar
Sylvain Dailler committed
588 589 590
(* create the path to a file for saving the external proof script *)
let create_file_rel_path c pr pn =
  let session = c.controller_session in
591
  let driver = snd (Hprover.find c.controller_provers pr) in
592
  let task = Session_itp.get_raw_task session pn in
Sylvain Dailler's avatar
Sylvain Dailler committed
593 594 595 596
  let session_dir = Session_itp.get_dir session in
  let th = get_encapsulating_theory session (APn pn) in
  let th_name = (Session_itp.theory_name th).Ident.id_string in
  let f = get_encapsulating_file session (ATh th) in
597
  let fn = Filename.chop_extension (Filename.basename (file_name f)) in
Sylvain Dailler's avatar
Sylvain Dailler committed
598 599 600 601 602 603
  let file = Driver.file_of_task driver fn th_name task in
  let file = Filename.concat session_dir file in
  let file = Sysutil.uniquify file in
  let file = Sysutil.relativize_filename session_dir file in
  file

604
let prepare_edition c ?file pn pr ~notification =
Sylvain Dailler's avatar
Sylvain Dailler committed
605
  let session = c.controller_session in
606 607 608
  let proof_attempts_id = get_proof_attempt_ids session pn in
  let panid =
    try
609 610 611 612 613 614 615 616 617 618 619 620 621 622
      let panid = Hprover.find proof_attempts_id pr in
      (* if no proof script yet, we need to add one
         it happens e.g when editing a file for an automatic prover
       *)
      let pa = get_proof_attempt_node session panid in
      match pa.proof_script with
      | None ->
         let file = match file with
           | Some f -> f
           | None -> create_file_rel_path c pr pn
         in
         set_proof_script pa file;
         panid
      | Some _ -> panid
623
    with Not_found ->
624 625 626 627
      let file = match file with
        | Some f -> f
        | None -> create_file_rel_path c pr pn
      in
628 629
      let limit = Call_provers.empty_limit in
      graft_proof_attempt session pn pr ~file ~limit
Sylvain Dailler's avatar
Sylvain Dailler committed
630
  in
631
  update_goal_node notification session pn;
632 633 634
  let pa = get_proof_attempt_node session panid in
  let file = Opt.get pa.proof_script in
  let session_dir = Session_itp.get_dir session in
Sylvain Dailler's avatar
Sylvain Dailler committed
635 636 637 638 639 640 641 642 643 644 645 646 647 648 649
  let file = Filename.concat session_dir file in
  let old =
    if Sys.file_exists file
    then
      begin
        let backup = file ^ ".bak" in
        if Sys.file_exists backup
        then Sys.remove backup;
        Sys.rename file backup;
        Some(open_in backup)
      end
    else None
  in
  let ch = open_out file in
  let fmt = formatter_of_out_channel ch in
650 651
  let task = Session_itp.get_raw_task session pn in
  let driver = snd (Hprover.find c.controller_provers pr) in
Sylvain Dailler's avatar
Sylvain Dailler committed
652 653 654
  Driver.print_task ~cntexample:false ?old driver fmt task;
  Opt.iter close_in old;
  close_out ch;
655
  panid,file
Sylvain Dailler's avatar
Sylvain Dailler committed
656 657 658

exception Editor_not_found

659
let schedule_edition c id pr ~callback ~notification =
Sylvain Dailler's avatar
Sylvain Dailler committed
660 661 662 663
  Debug.dprintf debug_sched "[Sched] Scheduling an edition@.";
  let config = c.controller_config in
  let session = c.controller_session in
  let prover_conf = Whyconf.get_prover_config config pr in
664
  (* Make sure editor exists. Fails otherwise *)
Sylvain Dailler's avatar
Sylvain Dailler committed
665 666
  let editor =
    match prover_conf.Whyconf.editor with
667
    | "" -> raise Editor_not_found
Sylvain Dailler's avatar
Sylvain Dailler committed
668
    | s ->
669 670 671 672 673
       try
         let ed = Whyconf.editor_by_id config s in
         String.concat " " (ed.Whyconf.editor_command ::
                              ed.Whyconf.editor_options)
       with Not_found -> raise Editor_not_found
Sylvain Dailler's avatar
Sylvain Dailler committed
674
  in
675
  let panid,file = prepare_edition c id pr ~notification in
676
  (* Notification node *)
677 678 679
  let callback panid s =
    begin
      match s with
680
      | UpgradeProver _ -> ()
681
      | Running -> ()
682 683
      | Done res ->
         (* set obsolete to true since we do not know if the manual
684
            proof was completed or not *)
685 686 687 688 689
         Debug.dprintf debug_sched
                       "Setting status of %a under parent %a to obsolete@."
                       print_proofAttemptID panid print_proofNodeID id;
         update_proof_attempt ~obsolete:true notification session id pr res;
         update_goal_node notification session id
690 691 692 693
      | Interrupted
      | InternalFailure _ ->
         update_goal_node notification session id
      | Undone | Detached | Uninstalled _ | Scheduled -> assert false
694 695
    end;
    callback panid s
696
  in
Sylvain Dailler's avatar
Sylvain Dailler committed
697
  Debug.dprintf debug_sched "[Editing] goal %s with command '%s' on file %s@."
698 699
                (Session_itp.get_proof_name session id).Ident.id_string
                editor file;
700 701
  let call = Call_provers.call_editor ~command:editor file in
  callback panid Running;
702
  Queue.add (c.controller_session,id,pr,callback panid,false,call,None)
703
            prover_tasks_edited;
704
  run_timeout_handler ()
705

706 707
(*** { 2 transformations} *)

708 709 710 711 712 713 714 715 716
let schedule_transformation c id name args ~callback ~notification =
  let callback s =
    begin match s with
          | TSdone tid -> update_trans_node notification c.controller_session tid
          | TSscheduled
          | TSfailed _ -> ()
    end;
    callback s
  in
717
  let apply_trans () =
718 719
    begin
      try
720 721 722
        let subtasks =
          apply_trans_to_goal ~allow_no_effect:false
                              c.controller_session c.controller_env name args id
723
        in
724 725 726 727 728 729
        let tid = graft_transf c.controller_session id name args subtasks in
        callback (TSdone tid)
      with
      | Exit ->
         (* if result is same as input task, consider it as a failure *)
         callback (TSfailed (id, Noprogress))
730
      | e (* when not (Debug.test_flag Debug.stack_trace) *) ->
731
          (* "@[Exception raised in Session_itp.apply_trans_to_goal %s:@ %a@.@]"
732
          name Exn_printer.exn_printer e; TODO *)
733
        callback (TSfailed (id, e))
734 735
    end;
    false
736 737 738
  in
  S.idle ~prio:0 apply_trans;
  callback TSscheduled
Clément Fumex's avatar
Clément Fumex committed
739

740 741 742

open Strategy

Sylvain Dailler's avatar
Sylvain Dailler committed
743
let run_strategy_on_goal
744
    c id strat ~counterexmp ~callback_pa ~callback_tr ~callback ~notification =
745 746 747 748 749 750
  let rec exec_strategy pc strat g =
    if pc < 0 || pc >= Array.length strat then
      callback STShalt
    else
      match Array.get strat pc with
      | Icall_prover(p,timelimit,memlimit) ->
MARCHE Claude's avatar
MARCHE Claude committed
751 752
         let callback panid res =
           callback_pa panid res;
753
           match res with
754
           | UpgradeProver _ | Scheduled | Running -> (* nothing to do yet *) ()
755 756 757
           | Done { Call_provers.pr_answer = Call_provers.Valid } ->
              (* proof succeeded, nothing more to do *)
              callback STShalt
758 759
           | Interrupted | InternalFailure _ ->
              callback STShalt
760 761 762 763 764
           | Done _ ->
              (* proof did not succeed, goto to next step *)
              callback (STSgoto (g,pc+1));
              let run_next () = exec_strategy (pc+1) strat g; false in
              S.idle ~prio:0 run_next
765
           | Undone | Detached | Uninstalled _ ->
766 767 768 769 770 771
                         (* should not happen *)
                         assert false
         in
         let limit = { Call_provers.empty_limit with
                       Call_provers.limit_time = timelimit;
                       limit_mem  = memlimit} in
772
         schedule_proof_attempt c g p ~counterexmp ~limit ~callback ~notification
773 774
      | Itransform(trname,pcsuccess) ->
         let callback ntr =
775
           callback_tr trname [] ntr;
776
           match ntr with
777
           | TSfailed _e -> (* transformation failed *)
778 779 780 781 782 783 784 785 786 787 788 789
              callback (STSgoto (g,pc+1));
              let run_next () = exec_strategy (pc+1) strat g; false in
              S.idle ~prio:0 run_next
           | TSscheduled -> ()
           | TSdone tid ->
              List.iter
                (fun g ->
                 callback (STSgoto (g,pcsuccess));
                 let run_next () =
                   exec_strategy pcsuccess strat g; false
                 in
                 S.idle ~prio:0 run_next)
MARCHE Claude's avatar
MARCHE Claude committed
790
                (get_sub_tasks c.controller_session tid)
791
         in
792
         schedule_transformation c g trname [] ~callback ~notification
793 794 795 796 797 798
      | Igoto pc ->
         callback (STSgoto (g,pc));
         exec_strategy pc strat g
  in
  exec_strategy 0 strat id

Sylvain Dailler's avatar
Sylvain Dailler committed
799 800
let schedule_pa_with_same_arguments
    c (pa: proof_attempt_node) (pn: proofNodeID) ~callback ~notification =
Sylvain Dailler's avatar
Sylvain Dailler committed
801 802 803 804
  let prover = pa.prover in
  let limit = pa.limit in
  schedule_proof_attempt c pn prover ~limit ~callback ~notification

Sylvain Dailler's avatar
Sylvain Dailler committed
805 806
let schedule_tr_with_same_arguments
    c (tr: transID) (pn: proofNodeID) ~callback ~notification =
Sylvain Dailler's avatar
Sylvain Dailler committed
807 808 809
  let s = c.controller_session in
  let args = get_transf_args s tr in
  let name = get_transf_name s tr in
810
  let callback = callback name args in
Sylvain Dailler's avatar
Sylvain Dailler committed
811 812
  schedule_transformation c pn name args ~callback ~notification

MARCHE Claude's avatar
MARCHE Claude committed
813 814 815 816 817
let proof_is_complete pa =
  match pa.Session_itp.proof_state with
  | None -> false
  | Some pr ->
     not pa.Session_itp.proof_obsolete &&
818
       Call_provers.(pr.pr_answer = Valid)
MARCHE Claude's avatar
MARCHE Claude committed
819

820 821 822
let clean_session c ~removed =
  (* clean should not change proved status *)
  let notification _ = assert false in
823
  let s = c.controller_session in
824 825 826 827 828
  (* This function is applied on leafs first for the case of removes *)
  Session_itp.fold_all_session s
    (fun () any ->
      (match any with
      | APa pa ->
829 830
        let pa = Session_itp.get_proof_attempt_node s pa in
        if pn_proved s pa.parent then
MARCHE Claude's avatar
MARCHE Claude committed
831
          if not (proof_is_complete pa) then
832
            remove_subtree ~notification ~removed c any
833
      | ATn tn ->
834 835
        let pn = get_trans_parent s tn in
        if pn_proved s pn && not (tn_proved s tn) then
836
          remove_subtree ~notification ~removed c (ATn tn)
837
      | _ -> ())) ()
838

839 840
(* This function folds on any subelements of given node and tries to mark all
   proof attempts it encounters *)
841
let mark_as_obsolete ~notification c any =
842
  let s = c.controller_session in
843
  (* Case for proof attempt only *)
844
  let mark_as_obsolete_pa n =
845 846
    let parent = get_proof_attempt_parent s n in
    Session_itp.mark_obsolete s n;
847
    notification (APa n);
848
    update_goal_node notification s parent
849 850 851
  in
  fold_all_any s
    (fun () any -> match any with
852
    | APa n -> mark_as_obsolete_pa n
853
    | _ -> ()) () any
854

Sylvain Dailler's avatar
Sylvain Dailler committed
855 856 857 858 859 860 861 862 863 864 865 866 867 868
exception BadCopyPaste

(* Reproduce the transformation made on node on an other one *)
let rec copy_paste ~notification ~callback_pa ~callback_tr c from_any to_any =
  let s = c.controller_session in
  if (not (is_below s from_any to_any) &&
      not (is_below s to_any from_any)) then
    match from_any, to_any with
    | AFile _, AFile _ ->
        raise BadCopyPaste
    | ATh _from_th, ATh _to_th ->
        raise BadCopyPaste
    | APn from_pn, APn to_pn ->
      let from_pa_list = get_proof_attempts s from_pn in
869
      List.iter (fun x -> schedule_pa_with_same_arguments c x to_pn ~counterexmp:false
Sylvain Dailler's avatar
Sylvain Dailler committed
870 871
          ~callback:callback_pa ~notification) from_pa_list;
      let from_tr_list = get_transformations s from_pn in
872
      let callback x tr args st = callback_tr tr args st;
Sylvain Dailler's avatar
Sylvain Dailler committed
873
        match st with
Sylvain Dailler's avatar
Sylvain Dailler committed
874 875
        | TSdone tid ->
          copy_paste c (ATn x) (ATn tid) ~notification ~callback_pa ~callback_tr
Sylvain Dailler's avatar
Sylvain Dailler committed
876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895
        | _ -> ()
      in
      List.iter (fun x -> schedule_tr_with_same_arguments c x to_pn
          ~callback:(callback x) ~notification) from_tr_list
    | ATn from_tn, ATn to_tn ->
        let from_tn_list = get_sub_tasks s from_tn in
        let to_tn_list = get_sub_tasks s to_tn in
        if (List.length from_tn_list = List.length to_tn_list) then
          List.iter2 (fun x y -> copy_paste c (APn x) (APn y)
              ~notification ~callback_pa ~callback_tr) from_tn_list to_tn_list
    | _ -> raise BadCopyPaste


let copy_detached ~copy c from_any =
  match from_any with
  | APn from_pn ->
    begin
      let pn_id = copy_proof_node_as_detached c.controller_session from_pn in
      let parent = get_any_parent c.controller_session from_any in
      match parent with
896
      | None -> raise (BadCopyDetached "copy_detached no parent")
Sylvain Dailler's avatar
Sylvain Dailler committed
897 898
      | Some parent ->
          copy ~parent (APn pn_id);
Sylvain Dailler's avatar
Sylvain Dailler committed
899 900
          copy_structure
            ~notification:copy c.controller_session (APn from_pn) (APn pn_id)
Sylvain Dailler's avatar
Sylvain Dailler committed
901
    end
902 903
  (* Only goal can be detached *)
  | _ -> raise (BadCopyDetached "copy_detached. Can only copy goal")
Sylvain Dailler's avatar
Sylvain Dailler committed
904

MARCHE Claude's avatar
MARCHE Claude committed
905 906 907 908 909 910 911 912 913 914 915







(***************** {2 replay} ****************)



916 917 918 919
type report =
  | Result of Call_provers.prover_result * Call_provers.prover_result
  (** Result(new_result,old_result) *)
  | CallFailed of exn
920
  | Replay_interrupted
921 922 923 924 925 926 927 928 929 930 931
  | Prover_not_installed
  | Edited_file_absent of string
  | No_former_result of Call_provers.prover_result

(* TODO find a better way to print it *)
let print_report fmt (r: report) =
  match r with
  | Result (new_r, old_r) ->
    Format.fprintf fmt "new_result = %a, old_result = %a@."
      Call_provers.print_prover_result new_r
      Call_provers.print_prover_result old_r
932 933 934 935
  | CallFailed e ->
    Format.fprintf fmt "Callfailed %a@." Exn_printer.exn_printer e
  | Replay_interrupted ->
    Format.fprintf fmt "Interrupted@."
936 937 938 939 940 941 942 943 944
  | Prover_not_installed ->
    Format.fprintf fmt "Prover not installed@."
  | Edited_file_absent _ ->
    Format.fprintf fmt "No edited file@."
  | No_former_result new_r ->
    Format.fprintf fmt "new_result = %a, no former result@."
      Call_provers.print_prover_result new_r

(* TODO to be removed when we have a better way to print *)
945
let replay_print fmt (lr: (proofNodeID * Whyconf.prover * Call_provers.resource_limit * report) list) =
946 947
  let pp_elem fmt (id, pr, rl, report) =
    fprintf fmt "ProofNodeID: %d, Prover: %a, Timelimit?: %d, Result: %a@."
Sylvain Dailler's avatar
Sylvain Dailler committed
948 949
      (Obj.magic id) Whyconf.print_prover pr
      rl.Call_provers.limit_time print_report report
950
  in
951
  Format.fprintf fmt "%a@." (Pp.print_list Pp.newline pp_elem) lr
952

953 954
let replay ?(obsolete_only=true) ?(use_steps=false)
           c ~callback ~notification ~final_callback =
955

956
  let craft_report count s r id pr limits pa =
957
    match s with
958
    | UpgradeProver _ | Scheduled | Running -> ()
959
    | Undone | Interrupted ->
960
       decr count;
961
       r := (id, pr, limits, Replay_interrupted ) :: !r
962
    | Done new_r ->
963
       decr count;
964 965 966 967
        (match pa.Session_itp.proof_state with
        | None -> (r := (id, pr, limits, No_former_result new_r) :: !r)
        | Some old_r -> r := (id, pr, limits, Result (new_r, old_r)) :: !r)
    | InternalFailure e ->
968
       decr count;
969
        r := (id, pr, limits, CallFailed (e)) :: !r
970 971 972
    | Uninstalled _ ->
       decr count;
       r := (id, pr, limits, Prover_not_installed) :: !r;
973
    | Detached -> decr count
974
  in
975 976 977 978 979 980 981 982

  let session = c.controller_session in
  let count = ref 0 in
  let report = ref [] in

  (* TODO count the number of node in a more efficient way *)
  (* Counting the number of proof_attempt to print report only once *)
  Session_itp.session_iter_proof_attempt
983
    (fun _ pa -> if pa.proof_obsolete || not obsolete_only then incr count) session;
984 985

  (* Replaying function *)
986
  let replay_pa id pa =
987 988 989 990
    if pa.proof_obsolete || not obsolete_only then
      begin
        let parid = pa.parent in
        let pr = pa.prover in
991 992 993 994
        (* TODO: if pr is not installed, lookup for a replacement policy
         OR: delegate this work to the replay_proof_attempt function *)
        (* If use_steps, we give only steps as a limit
         TODO: steps should not be used if prover was replaced above *)
995 996 997 998 999 1000
        let limit =
          if use_steps then
            Call_provers.{empty_limit with limit_steps = pa.limit.limit_steps}
          else
            Call_provers.{ pa.limit with limit_steps = empty_limit.limit_steps }
        in
1001
        replay_proof_attempt c pr limit parid id
1002 1003 1004 1005 1006 1007
                             ~callback:(fun id s ->
                                        craft_report count s report parid pr limit pa;
                                        callback id s;
                                        if !count = 0 then final_callback !report)
                             ~notification
      end in
1008

1009
  if !count = 0 then final_callback !report else
1010
  (* Calling replay on all the proof_attempts of the session *)
1011
  Session_itp.session_iter_proof_attempt replay_pa session
1012

MARCHE Claude's avatar
MARCHE Claude committed
1013 1014 1015 1016 1017 1018 1019 1020 1021



(*************** bisect **********)



let debug = Debug.register_flag ~desc:"Task bisection" "bisect"

1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036
let create_rem_list =
  let b = Buffer.create 17 in
  fun rem ->
  Buffer.clear b;
  let add pr id =
    if Buffer.length b > 0 then Buffer.add_char b ',';
    Buffer.add_string b (Pp.string_of pr id)
  in
  let remove_ts ts = add Pretty.print_ts ts in
  let remove_ls ls = add Pretty.print_ls ls in
  let remove_pr pr = add Pretty.print_pr pr in
  Ty.Sts.iter remove_ts rem.Eliminate_definition.rem_ts;
  Term.Sls.iter remove_ls rem.Eliminate_definition.rem_ls;
  Decl.Spr.iter remove_pr rem.Eliminate_definition.rem_pr;
  Buffer.contents b
MARCHE Claude's avatar
MARCHE Claude committed
1037 1038


1039
let bisect_proof_attempt ~callback_tr ~callback_pa ~notification ~removed c pa_id =
MARCHE Claude's avatar
MARCHE Claude committed
1040 1041
  let ses = c.controller_session in
  let pa = get_proof_attempt_node ses pa_id in
MARCHE Claude's avatar
MARCHE Claude committed
1042 1043
  if not (proof_is_complete pa) then
    invalid_arg "bisect: proof attempt should be valid";
MARCHE Claude's avatar
MARCHE Claude committed
1044 1045 1046 1047 1048 1049
  let goal_id = pa.parent in
  let prover = pa.prover in
  let limit = { pa.limit with
                Call_provers.limit_steps =
                  Call_provers.empty_limit.Call_provers.limit_steps }
  in
1050
  let timelimit = ref limit.Call_provers.limit_time in
MARCHE Claude's avatar
MARCHE Claude committed
1051 1052
  let set_timelimit res =
    timelimit := 1 + (int_of_float (floor res.Call_provers.pr_time)) in
MARCHE Claude's avatar
MARCHE Claude committed
1053 1054 1055 1056 1057 1058 1059 1060 1061 1062
  let bisect_end rem =
    if Decl.Spr.is_empty rem.Eliminate_definition.rem_pr &&
         Term.Sls.is_empty rem.Eliminate_definition.rem_ls &&
           Ty.Sts.is_empty rem.Eliminate_definition.rem_ts
    then
      Debug.dprintf debug "Bisecting didn't reduce the task.@."
    else
      begin
        Debug.dprintf debug "Bisecting done.@.";
        (* apply again the transformation *)
1063 1064 1065 1066
        let rem = create_rem_list rem in
        let callback st =
          callback_tr "remove" [rem] st;
          begin match st with
MARCHE Claude's avatar
MARCHE Claude committed
1067 1068 1069 1070 1071 1072
          | TSscheduled -> ()
          | TSfailed _ -> assert false
          | TSdone trid ->
             match get_sub_tasks ses trid with
             | [pn] ->
                let limit = { limit with Call_provers.limit_time = !timelimit; } in
1073 1074 1075
                let callback paid st =
                  callback_pa paid st;
                  begin match st with
1076
                  | UpgradeProver _ | Scheduled | Running -> ()
MARCHE Claude's avatar
MARCHE Claude committed
1077
                  | Detached | Uninstalled _ -> assert false
1078
                  | Undone | Interrupted -> Debug.dprintf debug "Bisecting interrupted.@."
MARCHE Claude's avatar
MARCHE Claude committed
1079 1080 1081 1082 1083 1084 1085
                  | InternalFailure exn ->
                     (* Perhaps the test can be considered false in this case? *)
                     Debug.dprintf debug "Bisecting interrupted by an error %a.@."
                                   Exn_printer.exn_printer exn
                  | Done res ->
                     assert (res.Call_provers.pr_answer = Call_provers.Valid);
                     Debug.dprintf debug "Bisecting: %a.@."
1086 1087
                                   Call_provers.print_prover_result res
                  end
MARCHE Claude's avatar
MARCHE Claude committed
1088 1089 1090
                in
                schedule_proof_attempt c pn prover ~counterexmp:false ~limit ~callback ~notification
             | _ -> assert false
1091
          end
MARCHE Claude's avatar
MARCHE Claude committed
1092
        in
1093 1094
        Debug.dprintf debug "To remove: %s@." rem;
        schedule_transformation c goal_id "remove" [rem] ~callback ~notification
MARCHE Claude's avatar
MARCHE Claude committed
1095
      end
MARCHE Claude's avatar
MARCHE Claude committed
1096
  in
MARCHE Claude's avatar
MARCHE Claude committed
1097 1098 1099 1100 1101 1102 1103 1104 1105 1106
  let rec bisect_step rem kont =
    (* we have to:
       1) apply transformation remove with the given rem
       2) on the generated sub-goal, run the prover with some callback
       3) the callback should :
          compute (next_iter success_value)
          if result is done, do nothing more
          if result is some new rem, remove the previous transformation
           and recursively call bisect_step
     *)
1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117
    let rem = create_rem_list rem in
    let callback st =
      callback_tr "remove" [rem] st;
      begin match st with
      | TSscheduled ->
         Debug.dprintf
           debug
           "[Bisect] transformation 'remove' scheduled@."
      | TSfailed(_,exn) ->
         (* may happen if removing a type or a lsymbol that is used
later on. We do has if proof fails. *)
MARCHE Claude's avatar
MARCHE Claude committed
1118
         begin
1119 1120 1121
           Debug.dprintf
             debug
             "[Bisect] transformation failed %a@." Exn_printer.exn_printer exn;
MARCHE Claude's avatar
MARCHE Claude committed
1122 1123 1124 1125 1126 1127 1128
           match kont false with
           | Eliminate_definition.BSstep (rem,kont) ->
              bisect_step rem kont
           | Eliminate_definition.BSdone rem ->
              bisect_end rem
         end
      | TSdone trid ->
1129 1130 1131
         Debug.dprintf
           debug
           "[Bisect] transformation 'remove' succeeds@.";
MARCHE Claude's avatar
MARCHE Claude committed
1132 1133 1134
         match get_sub_tasks ses trid with
         | [pn] ->
            let limit = { limit with Call_provers.limit_time = !timelimit; } in
1135 1136
            let callback paid st =
              callback_pa paid st;
1137 1138 1139
              begin
              match st with
              | UpgradeProver _ -> ()
1140 1141 1142 1143 1144 1145 1146 1147
              | Scheduled ->
                 Debug.dprintf
                   debug "[Bisect] prover on subtask is scheduled@."
              | Running ->
                 Debug.dprintf
                   debug "[Bisect] prover on subtask is running@.";
              | Detached
              | Uninstalled _ -> assert false
1148
              | Undone | Interrupted -> Debug.dprintf debug "Bisecting interrupted.@."
MARCHE Claude's avatar
MARCHE Claude committed
1149 1150
              | InternalFailure exn ->
                 (* Perhaps the test can be considered false in this case? *)
1151
                 Debug.dprintf debug "[Bisect] prover interrupted by an error: %a.@."
MARCHE Claude's avatar
MARCHE Claude committed
1152 1153
                               Exn_printer.exn_printer exn
              | Done res ->
1154 1155 1156
                 Debug.dprintf
                   debug "[Bisect] prover on subtask returns %a@."
                   Call_provers.print_prover_answer res.Call_provers.pr_answer;
MARCHE Claude's avatar
MARCHE Claude committed
1157 1158 1159 1160
                 let b = res.Call_provers.pr_answer = Call_provers.Valid in
                 if b then set_timelimit res;
                 match kont b with
                 | Eliminate_definition.BSstep (rem,kont) ->
1161
                    Session_itp.remove_subtree ~notification ~removed ses (Session_itp.ATn trid);
MARCHE Claude's avatar
MARCHE Claude committed
1162 1163 1164
                    bisect_step rem kont
                 | Eliminate_definition.BSdone rem ->
                    bisect_end rem
1165
              end
MARCHE Claude's avatar
MARCHE Claude committed
1166
            in
1167 1168
            Debug.dprintf
              debug "[Bisect] running the prover on subtask@.";
MARCHE Claude's avatar
MARCHE Claude committed
1169 1170
            schedule_proof_attempt c pn prover ~counterexmp:false ~limit ~callback ~notification
         | _ -> assert false
1171
      end
MARCHE Claude's avatar
MARCHE Claude committed
1172
    in
1173 1174
    Debug.dprintf debug "To remove: %s@." rem;
    schedule_transformation c goal_id "remove" [rem] ~callback ~notification
MARCHE Claude's avatar
MARCHE Claude committed
1175 1176
  in
  Debug.dprintf debug "Bisecting with %a started.@."
MARCHE Claude's avatar
MARCHE Claude committed
1177 1178 1179 1180 1181
                Whyconf.print_prover prover;
  let t = get_raw_task ses goal_id in
  match Eliminate_definition.bisect_step t with
  | Eliminate_definition.BSdone _ -> assert false
  | Eliminate_definition.BSstep(rem,kont) -> bisect_step rem kont
MARCHE Claude's avatar
MARCHE Claude committed
1182

1183