author | blanchet |
Fri, 19 Mar 2010 15:07:44 +0100 | |
changeset 35866 | 513074557e06 |
parent 35865 | 2f8fb5242799 |
child 35867 | 16279c4c7a33 |
permissions | -rw-r--r-- |
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(* Title: HOL/Tools/ATP_Manager/atp_manager.ML |
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Author: Fabian Immler, TU Muenchen |
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Author: Makarius |
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Central manager component for ATP threads. |
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*) |
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signature ATP_MANAGER = |
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sig |
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val atps: string Unsynchronized.ref |
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val get_atps: unit -> string list |
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val timeout: int Unsynchronized.ref |
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val full_types: bool Unsynchronized.ref |
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val kill: unit -> unit |
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val info: unit -> unit |
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val messages: int option -> unit |
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val add_prover: string * ATP_Wrapper.prover -> theory -> theory |
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val get_prover: theory -> string -> ATP_Wrapper.prover option |
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val print_provers: theory -> unit |
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val sledgehammer: string list -> Proof.state -> unit |
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end; |
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structure ATP_Manager : ATP_MANAGER = |
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struct |
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(** preferences **) |
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val message_store_limit = 20; |
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val message_display_limit = 5; |
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val atps = Unsynchronized.ref "e spass remote_vampire"; |
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fun get_atps () = String.tokens (Symbol.is_ascii_blank o String.str) (! atps); |
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val timeout = Unsynchronized.ref 60; |
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val full_types = Unsynchronized.ref false; |
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val _ = |
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ProofGeneralPgip.add_preference Preferences.category_proof |
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(Preferences.string_pref atps |
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"ATP: provers" "Default automatic provers (separated by whitespace)"); |
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val _ = |
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ProofGeneralPgip.add_preference Preferences.category_proof |
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(Preferences.int_pref timeout |
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"ATP: timeout" "ATPs will be interrupted after this time (in seconds)"); |
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val _ = |
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ProofGeneralPgip.add_preference Preferences.category_proof |
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(Preferences.bool_pref full_types |
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"ATP: full types" "ATPs will use full type information"); |
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||
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(** thread management **) |
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(* data structures over threads *) |
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||
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structure Thread_Heap = Heap |
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( |
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type elem = Time.time * Thread.thread; |
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fun ord ((a, _), (b, _)) = Time.compare (a, b); |
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); |
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fun lookup_thread xs = AList.lookup Thread.equal xs; |
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fun delete_thread xs = AList.delete Thread.equal xs; |
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fun update_thread xs = AList.update Thread.equal xs; |
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(* state of thread manager *) |
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type state = |
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{manager: Thread.thread option, |
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timeout_heap: Thread_Heap.T, |
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active: (Thread.thread * (Time.time * Time.time * string)) list, |
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cancelling: (Thread.thread * (Time.time * string)) list, |
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messages: string list, |
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store: string list}; |
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fun make_state manager timeout_heap active cancelling messages store : state = |
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{manager = manager, timeout_heap = timeout_heap, active = active, |
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cancelling = cancelling, messages = messages, store = store}; |
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val global_state = Synchronized.var "atp_manager" |
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(make_state NONE Thread_Heap.empty [] [] [] []); |
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(* unregister ATP thread *) |
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fun unregister message thread = Synchronized.change global_state |
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(fn state as {manager, timeout_heap, active, cancelling, messages, store} => |
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(case lookup_thread active thread of |
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SOME (_, _, description) => |
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let |
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val active' = delete_thread thread active; |
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val cancelling' = (thread, (Time.now (), description)) :: cancelling; |
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val message' = description ^ "\n" ^ message; |
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val messages' = message' :: messages; |
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val store' = message' :: |
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(if length store <= message_store_limit then store |
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else #1 (chop message_store_limit store)); |
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in make_state manager timeout_heap active' cancelling' messages' store' end |
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| NONE => state)); |
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(* main manager thread -- only one may exist *) |
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val min_wait_time = Time.fromMilliseconds 300; |
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val max_wait_time = Time.fromSeconds 10; |
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fun print_new_messages () = |
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let val msgs = Synchronized.change_result global_state |
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(fn {manager, timeout_heap, active, cancelling, messages, store} => |
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(messages, make_state manager timeout_heap active cancelling [] store)) |
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in |
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if null msgs then () |
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else priority ("Sledgehammer: " ^ space_implode "\n\n" msgs) |
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end; |
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fun check_thread_manager () = Synchronized.change global_state |
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(fn state as {manager, timeout_heap, active, cancelling, messages, store} => |
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if (case manager of SOME thread => Thread.isActive thread | NONE => false) then state |
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else let val manager = SOME (Toplevel.thread false (fn () => |
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let |
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fun time_limit timeout_heap = |
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(case try Thread_Heap.min timeout_heap of |
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NONE => Time.+ (Time.now (), max_wait_time) |
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| SOME (time, _) => time); |
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(*action: find threads whose timeout is reached, and interrupt cancelling threads*) |
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fun action {manager, timeout_heap, active, cancelling, messages, store} = |
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let val (timeout_threads, timeout_heap') = |
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Thread_Heap.upto (Time.now (), Thread.self ()) timeout_heap; |
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in |
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if null timeout_threads andalso null cancelling |
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then NONE |
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else |
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let |
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val _ = List.app (SimpleThread.interrupt o #1) cancelling; |
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val cancelling' = filter (Thread.isActive o #1) cancelling; |
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val state' = make_state manager timeout_heap' active cancelling' messages store; |
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in SOME (map #2 timeout_threads, state') end |
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end; |
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in |
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while Synchronized.change_result global_state |
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(fn state as {timeout_heap, active, cancelling, messages, store, ...} => |
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if null active andalso null cancelling andalso null messages |
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then (false, make_state NONE timeout_heap active cancelling messages store) |
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else (true, state)) |
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do |
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(Synchronized.timed_access global_state (SOME o time_limit o #timeout_heap) action |
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|> these |
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|> List.app (unregister "Interrupted (reached timeout)"); |
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print_new_messages (); |
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(*give threads some time to respond to interrupt*) |
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OS.Process.sleep min_wait_time) |
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end)) |
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in make_state manager timeout_heap active cancelling messages store end); |
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||
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(* register ATP thread *) |
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fun register birth_time death_time (thread, desc) = |
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(Synchronized.change global_state |
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(fn {manager, timeout_heap, active, cancelling, messages, store} => |
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let |
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val timeout_heap' = Thread_Heap.insert (death_time, thread) timeout_heap; |
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val active' = update_thread (thread, (birth_time, death_time, desc)) active; |
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val state' = make_state manager timeout_heap' active' cancelling messages store; |
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in state' end); |
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check_thread_manager ()); |
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(** user commands **) |
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|
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176 |
(* kill *) |
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177 |
|
32938 | 178 |
fun kill () = Synchronized.change global_state |
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179 |
(fn {manager, timeout_heap, active, cancelling, messages, store} => |
32938 | 180 |
let |
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val killing = map (fn (th, (_, _, desc)) => (th, (Time.now (), desc))) active; |
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val state' = make_state manager timeout_heap [] (killing @ cancelling) messages store; |
32938 | 183 |
in state' end); |
28582 | 184 |
|
185 |
||
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186 |
(* info *) |
28582 | 187 |
|
32938 | 188 |
fun seconds time = string_of_int (Time.toSeconds time) ^ "s"; |
189 |
||
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fun info () = |
191 |
let |
|
32938 | 192 |
val {active, cancelling, ...} = Synchronized.value global_state; |
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193 |
|
32938 | 194 |
val now = Time.now (); |
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195 |
fun running_info (_, (birth_time, death_time, desc)) = |
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"Running: " ^ seconds (Time.- (now, birth_time)) ^ " -- " ^ |
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seconds (Time.- (death_time, now)) ^ " to live:\n" ^ desc; |
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198 |
fun cancelling_info (_, (deadth_time, desc)) = |
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199 |
"Trying to interrupt thread since " ^ seconds (Time.- (now, deadth_time)) ^ ":\n" ^ desc; |
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200 |
|
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201 |
val running = |
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202 |
if null active then "No ATPs running." |
32938 | 203 |
else space_implode "\n\n" ("Running ATPs:" :: map running_info active); |
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204 |
val interrupting = |
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if null cancelling then "" |
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else |
207 |
space_implode "\n\n" |
|
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("Trying to interrupt the following ATPs:" :: map cancelling_info cancelling); |
|
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209 |
|
28582 | 210 |
in writeln (running ^ "\n" ^ interrupting) end; |
211 |
||
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212 |
fun messages opt_limit = |
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213 |
let |
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214 |
val limit = the_default message_display_limit opt_limit; |
32938 | 215 |
val {store, ...} = Synchronized.value global_state; |
216 |
val header = |
|
217 |
"Recent ATP messages" ^ |
|
218 |
(if length store <= limit then ":" else " (" ^ string_of_int limit ^ " displayed):"); |
|
219 |
in writeln (space_implode "\n\n" (header :: #1 (chop limit store))) end; |
|
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220 |
|
28582 | 221 |
|
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222 |
|
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223 |
(** The Sledgehammer **) |
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224 |
|
28582 | 225 |
(* named provers *) |
28484 | 226 |
|
28582 | 227 |
fun err_dup_prover name = error ("Duplicate prover: " ^ quote name); |
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228 |
|
33522 | 229 |
structure Provers = Theory_Data |
28582 | 230 |
( |
32938 | 231 |
type T = (ATP_Wrapper.prover * stamp) Symtab.table; |
232 |
val empty = Symtab.empty; |
|
233 |
val extend = I; |
|
33522 | 234 |
fun merge data : T = Symtab.merge (eq_snd op =) data |
32938 | 235 |
handle Symtab.DUP dup => err_dup_prover dup; |
28582 | 236 |
); |
28484 | 237 |
|
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238 |
fun add_prover (name, prover) thy = |
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239 |
Provers.map (Symtab.update_new (name, (prover, stamp ()))) thy |
28582 | 240 |
handle Symtab.DUP dup => err_dup_prover dup; |
241 |
||
32995 | 242 |
fun get_prover thy name = |
243 |
Option.map #1 (Symtab.lookup (Provers.get thy) name); |
|
244 |
||
28582 | 245 |
fun print_provers thy = Pretty.writeln |
246 |
(Pretty.strs ("external provers:" :: sort_strings (Symtab.keys (Provers.get thy)))); |
|
28571 | 247 |
|
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248 |
|
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249 |
(* start prover thread *) |
28484 | 250 |
|
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251 |
fun start_prover name birth_time death_time i proof_state = |
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252 |
(case get_prover (Proof.theory_of proof_state) name of |
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253 |
NONE => warning ("Unknown external prover: " ^ quote name) |
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254 |
| SOME prover => |
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255 |
let |
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256 |
val {context = ctxt, facts, goal} = Proof.goal proof_state; |
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257 |
val desc = |
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258 |
"external prover " ^ quote name ^ " for subgoal " ^ string_of_int i ^ ":\n" ^ |
32938 | 259 |
Syntax.string_of_term ctxt (Thm.term_of (Thm.cprem_of goal i)); |
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260 |
|
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Toplevel.thread provides Isar-style exception output;
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261 |
val _ = Toplevel.thread true (fn () => |
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|
262 |
let |
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|
263 |
val _ = register birth_time death_time (Thread.self (), desc); |
33292 | 264 |
val problem = ATP_Wrapper.problem_of_goal (! full_types) i (ctxt, (facts, goal)); |
33312 | 265 |
val message = #message (prover (! timeout) problem) |
35865 | 266 |
handle Sledgehammer_HOL_Clause.TRIVIAL => (* FIXME !? *) |
33312 | 267 |
"Empty clause: Try this command: " ^ Markup.markup Markup.sendback "apply metis" |
268 |
| ERROR msg => ("Error: " ^ msg); |
|
269 |
val _ = unregister message (Thread.self ()); |
|
35569 | 270 |
in () end); |
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271 |
in () end); |
28582 | 272 |
|
273 |
||
274 |
(* sledghammer for first subgoal *) |
|
275 |
||
276 |
fun sledgehammer names proof_state = |
|
277 |
let |
|
32938 | 278 |
val provers = if null names then get_atps () else names; |
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|
279 |
val birth_time = Time.now (); |
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|
280 |
val death_time = Time.+ (birth_time, Time.fromSeconds (! timeout)); |
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|
281 |
val _ = kill (); (*RACE wrt. other invocations of sledgehammer*) |
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282 |
val _ = List.app (fn name => start_prover name birth_time death_time 1 proof_state) provers; |
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|
283 |
in () end; |
28582 | 284 |
|
285 |
end; |