controller_itp.ml 12.1 KB
Newer Older
1 2 3 4



open Format
Clément Fumex's avatar
Clément Fumex committed
5 6 7 8 9 10 11 12 13 14 15 16
open Session_itp

(** State of a proof *)
type proof_attempt_status =
    | Unedited (** editor not yet run for interactive proof *)
    | JustEdited (** edited but not run yet *)
    | Interrupted (** external proof has never completed *)
    | Scheduled (** external proof attempt is scheduled *)
    | Running (** external proof attempt is in progress *)
    | Done of Call_provers.prover_result (** external proof done *)
    | InternalFailure of exn (** external proof aborted by internal error *)

MARCHE Claude's avatar
MARCHE Claude committed
17 18 19 20 21 22 23 24 25 26 27
let print_status fmt st =
  match st with
  | Unedited -> fprintf fmt "Unedited"
  | JustEdited -> fprintf fmt "JustEdited"
  | Interrupted -> fprintf fmt "Interrupted"
  | Scheduled -> fprintf fmt "Scheduled"
  | Running -> fprintf fmt "Running"
  | Done r -> fprintf fmt "Done(%a)" Call_provers.print_prover_result r
  | InternalFailure e -> fprintf fmt "InternalFailure(%a)" Exn_printer.exn_printer e

type transformation_status =
28
  | TSscheduled | TSdone of transID | TSfailed
29 30 31 32

let print_trans_status fmt st =
  match st with
  | TSscheduled -> fprintf fmt "TScheduled"
33
  | TSdone _tid -> fprintf fmt "TSdone" (* TODO print tid *)
34
  | TSfailed -> fprintf fmt "TSfailed"
Clément Fumex's avatar
Clément Fumex committed
35

36 37 38 39 40 41 42 43
type strategy_status = STSgoto of proofNodeID * int | STShalt

let print_strategy_status fmt st =
  match st with
  | STSgoto(id,n) -> fprintf fmt "goto step %d in proofNode %a" n print_proofNodeID id
  | STShalt -> fprintf fmt "halt"


44 45 46 47 48 49 50 51
open Ident

type proof_state = {
    th_state: bool Hid.t;
    tn_state: bool Htn.t;
    pn_state : bool Hpn.t;
  }

52
let init_proof_state _ses =
53 54 55 56
  {th_state = Hid.create 7;
   tn_state = Htn.create 42;
   pn_state = Hpn.create 42}

57
type controller =
58
  { mutable controller_session : Session_itp.session;
59
    proof_state : proof_state;
60
    controller_env : Env.env;
61 62 63
    controller_provers : (Whyconf.config_prover * Driver.driver) Whyconf.Hprover.t;
  }

64
let create_controller env s = {
65
    controller_session = s;
Clément Fumex's avatar
Clément Fumex committed
66
    proof_state = init_proof_state s;
67
    controller_env = env;
68 69 70
    controller_provers = Whyconf.Hprover.create 7;
}

Clément Fumex's avatar
Clément Fumex committed
71 72 73
let tn_proved c tid = Htn.find_def c.proof_state.tn_state false tid
let pn_proved c pid = Hpn.find_def c.proof_state.pn_state false pid
let th_proved c th  = Hid.find_def c.proof_state.th_state false th
74 75 76 77 78

(* Update the result of the theory according to its children *)
let update_theory th ps =
  let goals = theory_goals th in
  Hid.replace ps.th_state (theory_name th)
79
    (List.for_all (fun id -> Hpn.find_def ps.pn_state false id) goals)
80 81 82

let rec propagate_proof c (id: Session_itp.proofNodeID) =
  let tr_list = get_transformations c.controller_session id in
Clément Fumex's avatar
Clément Fumex committed
83 84
  let new_state = List.exists (fun id -> tn_proved c id) tr_list in
  if new_state != pn_proved c id then
85 86 87 88 89 90 91
    begin
      Hpn.replace c.proof_state.pn_state id new_state;
      update_proof c id
    end

and propagate_trans c (tid: Session_itp.transID) =
  let proof_list = get_sub_tasks c.controller_session tid in
Clément Fumex's avatar
Clément Fumex committed
92 93
  let cur_state = tn_proved c tid in
  let new_state = List.for_all (fun id -> pn_proved c id) proof_list in
94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115
  if cur_state != new_state then
    begin
      Htn.replace c.proof_state.tn_state tid new_state;
      propagate_proof c (get_trans_parent c.controller_session tid)
    end

and update_proof c id =
  match get_proof_parent c.controller_session id with
  | Theory th -> update_theory th c.proof_state
  | Trans tid -> propagate_trans c tid

(* [update_proof_node c id b] Update the whole proof_state
   of c according to the result (id, b) *)
let update_proof_node c id b =
  Hpn.replace c.proof_state.pn_state id b;
  update_proof c id

(* [update_trans_node c id b] Update the proof_state of c to take the result of (id,b). Then
   propagates it to its parents *)
let update_trans_node c id b =
  Htn.replace c.proof_state.tn_state id b;
  propagate_proof c (get_trans_parent c.controller_session id)
116

117

118 119
module type Scheduler = sig
  val timeout: ms:int -> (unit -> bool) -> unit
MARCHE Claude's avatar
MARCHE Claude committed
120
  val idle: prio:int -> (unit -> bool) -> unit
121 122 123 124 125
end


module Make(S : Scheduler) = struct

MARCHE Claude's avatar
MARCHE Claude committed
126 127 128 129 130 131 132 133 134
let scheduled_proof_attempts = Queue.create ()

let prover_tasks_in_progress = Queue.create ()

let timeout_handler_running = ref false

let max_number_of_running_provers = ref 1

let number_of_running_provers = ref 0
135
module Hprover = Whyconf.Hprover
MARCHE Claude's avatar
MARCHE Claude committed
136

137
(*
MARCHE Claude's avatar
MARCHE Claude committed
138 139 140 141 142 143 144 145 146
let dummy_result =
  {
    pr_answer = Call_provers.Unknown ("I'm dumb", None);
    pr_status = Unix.WEXITED 0;
    pr_output = "";
    pr_time   = 3.14;
    pr_steps  = 42;
    pr_model  = Model_parser.default_model;
}
147
 *)
MARCHE Claude's avatar
MARCHE Claude committed
148

149 150 151 152
let build_prover_call c id pr limit callback =
  let (config_pr,driver) = Hprover.find c.controller_provers pr in
  let command =
    Whyconf.get_complete_command config_pr
MARCHE Claude's avatar
MARCHE Claude committed
153
          ~with_steps:Call_provers.(limit.limit_steps <> empty_limit.limit_steps) in
154 155
  let task = Session_itp.get_task c.controller_session id in
  let call =
MARCHE Claude's avatar
itp  
MARCHE Claude committed
156
    Driver.prove_task ?old:None ~cntexample:true ~inplace:false ~command
157 158
                      ~limit driver task
  in
159
  let pa = (c.controller_session,id,pr,callback,false,call) in
MARCHE Claude's avatar
MARCHE Claude committed
160 161 162 163 164 165
  Queue.push pa prover_tasks_in_progress

let timeout_handler () =
  (* examine all the prover tasks in progress *)
  let q = Queue.create () in
  while not (Queue.is_empty prover_tasks_in_progress) do
166
    let (ses,id,pr,callback,started,call) as c = Queue.pop prover_tasks_in_progress in
167
    match Call_provers.query_call call with
MARCHE Claude's avatar
MARCHE Claude committed
168 169 170 171 172
    | Call_provers.NoUpdates -> Queue.add c q
    | Call_provers.ProverStarted ->
       assert (not started);
       callback Running;
       incr number_of_running_provers;
173
       Queue.add (ses,id,pr,callback,true,call) q
MARCHE Claude's avatar
MARCHE Claude committed
174 175
    | Call_provers.ProverFinished res ->
       if started then decr number_of_running_provers;
176 177 178
       (* update the session *)
       update_proof_attempt ses id pr res;
       (* inform the callback *)
MARCHE Claude's avatar
MARCHE Claude committed
179 180 181
       callback (Done res)
  done;
  Queue.transfer q prover_tasks_in_progress;
182
  (* if the number of prover tasks is less than 3 times the maximum
MARCHE Claude's avatar
MARCHE Claude committed
183 184 185
     number of running provers, then we heuristically decide to add
     more tasks *)
  try
186
    for _i = Queue.length prover_tasks_in_progress
MARCHE Claude's avatar
MARCHE Claude committed
187
        to 3 * !max_number_of_running_provers do
Clément Fumex's avatar
Clément Fumex committed
188
      let (c,id,pr,limit,callback) = Queue.pop scheduled_proof_attempts in
MARCHE Claude's avatar
MARCHE Claude committed
189
      try
Clément Fumex's avatar
Clément Fumex committed
190
        build_prover_call c id pr limit callback
MARCHE Claude's avatar
MARCHE Claude committed
191 192
      with e when not (Debug.test_flag Debug.stack_trace) ->
        Format.eprintf
193
          "@[Exception raised in Controller_itp.build_prover_call:@ %a@.@]"
MARCHE Claude's avatar
MARCHE Claude committed
194 195 196 197 198 199 200 201 202 203 204 205 206
          Exn_printer.exn_printer e;
        callback (InternalFailure e)
    done;
    true
  with Queue.Empty -> true

let run_timeout_handler () =
  if not !timeout_handler_running then
    begin
      timeout_handler_running := true;
      S.timeout ~ms:125 timeout_handler;
    end

207
let schedule_proof_attempt_r c id pr ~limit ~callback =
208
  graft_proof_attempt c.controller_session id pr ~timelimit:limit.Call_provers.limit_time;
209
  Queue.add (c,id,pr,limit,callback) scheduled_proof_attempts;
MARCHE Claude's avatar
MARCHE Claude committed
210 211
  callback Scheduled;
  run_timeout_handler ()
Clément Fumex's avatar
Clément Fumex committed
212

213 214
let schedule_proof_attempt c id pr ~limit ~callback =
  let callback s = (match s with
Clément Fumex's avatar
Clément Fumex committed
215
  | Done pr -> update_proof_node c id (pr.Call_provers.pr_answer == Call_provers.Valid)
216 217 218 219 220 221 222
  | Interrupted | InternalFailure _ -> update_proof_node c id false
  | _ -> ());
  callback s
  in
  schedule_proof_attempt_r c id pr ~limit:limit ~callback:callback

let schedule_transformation_r c id name args ~callback =
223 224
  let apply_trans () =
    let task = get_task c.controller_session id in
225 226 227 228 229 230 231 232 233 234 235 236 237 238 239
    begin
      try
        let subtasks = Trans.apply_transform_args name c.controller_env args task in
        (* if result is same as input task, consider it as a failure *)
        begin
          match subtasks with
          | [t'] when Task.task_equal t' task ->
             callback TSfailed
          | _ ->
             let tid = graft_transf c.controller_session id name args subtasks in
             callback (TSdone tid)
        end
      with e when not (Debug.test_flag Debug.stack_trace) ->
        Format.eprintf
          "@[Exception raised in Trans.apply_transform %s:@ %a@.@]"
240
          name Exn_printer.exn_printer e;
241 242 243
        callback TSfailed
    end;
    false
244 245 246
  in
  S.idle ~prio:0 apply_trans;
  callback TSscheduled
Clément Fumex's avatar
Clément Fumex committed
247

248 249
let schedule_transformation c id name args ~callback =
  let callback s = (match s with
250 251 252
  | TSdone tid -> update_trans_node c tid false
  (*(get_sub_tasks c.controller_session tid = [])*)
  (* TODO need to change schedule transformation to get the id ? *)
253 254
  | TSfailed -> ()
  | _ -> ()); callback s in
255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315
  schedule_transformation_r c id name args ~callback

open Strategy

let run_strategy_on_goal c id strat ~callback =
  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) ->
         let callback res =
           match res with
           | Scheduled | Running -> (* nothing to do yet *) ()
           | Done { Call_provers.pr_answer = Call_provers.Valid } ->
              (* proof succeeded, nothing more to do *)
              callback STShalt
           | Interrupted | InternalFailure _
           | 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
           | Unedited | JustEdited ->
                         (* should not happen *)
                         assert false
         in
         let limit = { Call_provers.empty_limit with
                       Call_provers.limit_time = timelimit;
                       limit_mem  = memlimit} in
         schedule_proof_attempt c g p ~limit ~callback
      | Itransform(trname,pcsuccess) ->
         let callback ntr =
           match ntr with
           | TSfailed -> (* transformation failed *)
              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)
                (get_sub_tasks c.controller_session tid);
              (*Todo._done todo*) ()
         in
         schedule_transformation c g trname [] ~callback
      | Igoto pc ->
         callback (STSgoto (g,pc));
         exec_strategy pc strat g
  in
  exec_strategy 0 strat id





316

Clément Fumex's avatar
Clément Fumex committed
317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335
let read_file env ?format fn =
  let theories = Env.read_file Env.base_language env ?format fn in
  let ltheories =
    Stdlib.Mstr.fold
      (fun name th acc ->
        (* Hack : with WP [name] and [th.Theory.th_name.Ident.id_string] *)
        let th_name =
          Ident.id_register (Ident.id_derive name th.Theory.th_name) in
         match th.Theory.th_name.Ident.id_loc with
           | Some l -> (l,th_name,th)::acc
           | None   -> (Loc.dummy_position,th_name,th)::acc)
      theories []
  in
  let th =  List.sort
      (fun (l1,_,_) (l2,_,_) -> Loc.compare l1 l2)
      ltheories
  in
  List.map (fun (_,_,a) -> a) th

336 337
let add_file c ?format fname =
  let theories = read_file c.controller_env ?format fname in
Clément Fumex's avatar
Clément Fumex committed
338
  add_file_section c.controller_session fname theories format
MARCHE Claude's avatar
MARCHE Claude committed
339

340 341 342 343 344
(** 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 *)

Clément Fumex's avatar
Clément Fumex committed
345
let merge_file (old_ses : session) (c : controller) env _ file =
MARCHE Claude's avatar
MARCHE Claude committed
346 347
  let format = file.file_format in
  let old_theories = file.file_theories in
Clément Fumex's avatar
Clément Fumex committed
348
  let file_name = Filename.concat (get_dir old_ses) file.file_name in
MARCHE Claude's avatar
MARCHE Claude committed
349 350
  let new_theories =
    try
Clément Fumex's avatar
Clément Fumex committed
351
      read_file c.controller_env file_name ?format
MARCHE Claude's avatar
MARCHE Claude committed
352 353 354 355
    with _ -> (* TODO: filter only syntax error and typing errors *)
      []
  in
  add_file_section
Clément Fumex's avatar
Clément Fumex committed
356
    c.controller_session ~merge:(old_ses,old_theories,env) file_name new_theories format
MARCHE Claude's avatar
MARCHE Claude committed
357

358

Clément Fumex's avatar
Clément Fumex committed
359
let reload_files (c : controller) (env : Env.env) =
360
  let old_ses = c.controller_session in
Clément Fumex's avatar
Clément Fumex committed
361 362
  c.controller_session <- empty_session ~shape_version:(get_shape_version old_ses) (get_dir old_ses);
  Stdlib.Hstr.iter (merge_file old_ses c env) (get_files old_ses)
363 364

end