author | wenzelm |
Mon, 15 Dec 2008 21:41:00 +0100 | |
changeset 29112 | f2b45eea6dac |
parent 28835 | d4d8eba5f781 |
child 29116 | d9e423b9e707 |
permissions | -rw-r--r-- |
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(* Title: HOL/Tools/atp_manager.ML |
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Author: Fabian Immler, TU Muenchen |
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ATP threads are registered here. |
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Threads with the same birth-time are seen as one group. |
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All threads of a group are killed when one thread of it has been successful, |
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or after a certain time, |
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or when the maximum number of threads exceeds; then the oldest thread is killed. |
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*) |
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signature ATP_MANAGER = |
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sig |
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val get_atps: unit -> string |
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val set_atps: string -> unit |
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val get_max_atps: unit -> int |
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val set_max_atps: int -> unit |
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val get_timeout: unit -> int |
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val set_timeout: int -> unit |
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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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type prover = int -> Proof.state -> bool * string |
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val add_prover: string -> prover -> theory -> theory |
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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 AtpManager: 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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local |
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val atps = ref "e"; |
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val max_atps = ref 5; (* ~1 means infinite number of atps *) |
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val timeout = ref 60; |
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in |
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fun get_atps () = CRITICAL (fn () => ! atps); |
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fun set_atps str = CRITICAL (fn () => atps := str); |
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fun get_max_atps () = CRITICAL (fn () => ! max_atps); |
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fun set_max_atps number = CRITICAL (fn () => max_atps := number); |
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fun get_timeout () = CRITICAL (fn () => ! timeout); |
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fun set_timeout time = CRITICAL (fn () => timeout := time); |
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val _ = |
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ProofGeneralPgip.add_preference "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 _ = ProofGeneralPgip.add_preference "Proof" |
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(Preferences.int_pref max_atps |
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"ATP: maximum number" "How many provers may run in parallel"); |
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val _ = ProofGeneralPgip.add_preference "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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end; |
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(** thread management **) |
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(* data structures over threads *) |
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structure ThreadHeap = HeapFun |
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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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val lookup_thread = AList.lookup Thread.equal; |
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val delete_thread = AList.delete Thread.equal; |
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val update_thread = AList.update Thread.equal; |
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(* state of thread manager *) |
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datatype T = State of |
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{timeout_heap: ThreadHeap.T, |
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oldest_heap: ThreadHeap.T, |
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active: (Thread.thread * (Time.time * Time.time * string)) list, |
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cancelling: (Thread.thread * (Time.time * Time.time * string)) list, |
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messages: string list}; |
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fun make_state timeout_heap oldest_heap active cancelling messages = |
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State {timeout_heap = timeout_heap, oldest_heap = oldest_heap, |
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active = active, cancelling = cancelling, messages = messages}; |
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val state = Synchronized.var "atp_manager" (make_state ThreadHeap.empty ThreadHeap.empty [] [] []); |
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(* the managing thread *) |
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(*watches over running threads and interrupts them if required*) |
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val managing_thread = ref (NONE: Thread.thread option); |
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(* unregister thread from thread manager -- move to cancelling *) |
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fun unregister (success, message) thread = Synchronized.change_result state |
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(fn State {timeout_heap, oldest_heap, active, cancelling, messages} => |
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let |
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val info = lookup_thread active thread |
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(* get birthtime of unregistering thread if successful - for group-killing*) |
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val birthtime = case info of NONE => Time.zeroTime |
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| SOME (tb, _, _) => if success then tb else Time.zeroTime |
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(* move unregistering thread to cancelling *) |
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val active' = delete_thread thread active |
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val cancelling' = case info of NONE => cancelling |
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| SOME (tb, _, desc) => update_thread (thread, (tb, Time.now (), desc)) cancelling |
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(* move all threads of the same group to cancelling *) |
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val group_threads = active |> map_filter (fn (th, (tb, _, desc)) => |
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if tb = birthtime then SOME (th, (tb, Time.now (), desc)) else NONE) |
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val active'' = filter_out (fn (_, (tb, _, _)) => tb = birthtime) active' |
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val cancelling'' = append group_threads cancelling' |
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(* message for user *) |
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val message' = case info of NONE => "" |
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| SOME (_, _, desc) => "Sledgehammer: " ^ desc ^ "\n" ^ message ^ |
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(if null group_threads then "" |
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else "\nInterrupted " ^ string_of_int (length group_threads - 1) ^ " other group members") |
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val messages' = message :: |
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(if length messages < message_store_limit then messages |
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else #1 (chop message_store_limit messages)); |
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in (message', make_state timeout_heap oldest_heap active'' cancelling'' messages') end); |
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(* kill excessive atp threads *) |
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fun excessive_atps active = |
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let val max = get_max_atps () |
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in length active > max andalso max > ~1 end; |
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local |
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fun kill_oldest () = |
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let exception Unchanged in |
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Synchronized.change_result state |
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(fn State {timeout_heap, oldest_heap, active, cancelling, messages} => |
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if ThreadHeap.is_empty oldest_heap orelse not (excessive_atps active) |
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then raise Unchanged |
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else |
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let val ((_, oldest_thread), oldest_heap') = ThreadHeap.min_elem oldest_heap |
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in (oldest_thread, make_state timeout_heap oldest_heap' active cancelling messages) end) |
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|> (priority o unregister (false, "Interrupted (maximum number of ATPs exceeded)")) |
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handle Unchanged => () |
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end; |
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161 |
|
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162 |
in |
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163 |
|
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164 |
fun kill_excessive () = |
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165 |
let val State {active, ...} = Synchronized.value state |
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166 |
in if excessive_atps active then (kill_oldest (); kill_excessive ()) else () end; |
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167 |
|
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168 |
end; |
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169 |
|
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170 |
|
28582 | 171 |
(* start a watching thread which runs forever -- only one may exist *) |
172 |
||
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173 |
fun check_thread_manager () = CRITICAL (fn () => |
28582 | 174 |
if (case ! managing_thread of SOME thread => Thread.isActive thread | NONE => false) |
175 |
then () else managing_thread := SOME (SimpleThread.fork false (fn () => |
|
28571 | 176 |
let |
28582 | 177 |
val min_wait_time = Time.fromMilliseconds 300 |
178 |
val max_wait_time = Time.fromSeconds 10 |
|
179 |
||
180 |
(* wait for next thread to cancel, or maximum*) |
|
181 |
fun time_limit (State {timeout_heap, ...}) = |
|
182 |
(case try ThreadHeap.min timeout_heap of |
|
183 |
NONE => SOME (Time.+ (Time.now (), max_wait_time)) |
|
184 |
| SOME (time, _) => SOME time) |
|
185 |
||
186 |
(* action: cancel find threads whose timeout is reached, and interrupt cancelling threads *) |
|
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187 |
fun action (State {timeout_heap, oldest_heap, active, cancelling, messages}) = |
28582 | 188 |
let val (timeout_threads, timeout_heap') = |
189 |
ThreadHeap.upto (Time.now (), Thread.self ()) timeout_heap |
|
190 |
in |
|
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191 |
if null timeout_threads andalso null cancelling andalso not (excessive_atps active) |
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192 |
then NONE |
28582 | 193 |
else |
194 |
let |
|
195 |
val _ = List.app (SimpleThread.interrupt o #1) cancelling |
|
196 |
val cancelling' = filter (Thread.isActive o #1) cancelling |
|
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197 |
val state' = make_state timeout_heap' oldest_heap active cancelling' messages |
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in SOME (map #2 timeout_threads, state') end |
199 |
end |
|
200 |
in |
|
201 |
while true do |
|
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(Synchronized.timed_access state time_limit action |
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|> these |
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|> List.app (priority o unregister (false, "Interrupted (reached timeout)")); |
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205 |
kill_excessive (); |
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206 |
(*give threads time to respond to interrupt*) |
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OS.Process.sleep min_wait_time) |
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208 |
end))); |
28582 | 209 |
|
210 |
||
211 |
(* thread is registered here by sledgehammer *) |
|
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212 |
|
28582 | 213 |
fun register birthtime deadtime (thread, desc) = |
214 |
(check_thread_manager (); |
|
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215 |
Synchronized.change state |
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216 |
(fn State {timeout_heap, oldest_heap, active, cancelling, messages} => |
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217 |
let |
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218 |
val timeout_heap' = ThreadHeap.insert (deadtime, thread) timeout_heap |
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219 |
val oldest_heap' = ThreadHeap.insert (birthtime, thread) oldest_heap |
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220 |
val active' = update_thread (thread, (birthtime, deadtime, desc)) active |
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221 |
in make_state timeout_heap' oldest_heap' active' cancelling messages end)); |
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222 |
|
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|
223 |
|
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224 |
|
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|
225 |
(** user commands **) |
28582 | 226 |
|
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227 |
(* kill: move all threads to cancelling *) |
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|
228 |
|
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229 |
fun kill () = Synchronized.change state |
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230 |
(fn State {timeout_heap, oldest_heap, active, cancelling, messages} => |
28582 | 231 |
let val formerly_active = map (fn (th, (tb, _, desc)) => (th, (tb, Time.now (), desc))) active |
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232 |
in make_state timeout_heap oldest_heap [] (formerly_active @ cancelling) messages end); |
28582 | 233 |
|
234 |
||
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235 |
(* ATP info *) |
28582 | 236 |
|
237 |
fun info () = |
|
238 |
let |
|
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|
239 |
val State {active, cancelling, ...} = Synchronized.value state |
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|
240 |
|
28571 | 241 |
fun running_info (_, (birth_time, dead_time, desc)) = "Running: " |
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242 |
^ (string_of_int o Time.toSeconds) (Time.- (Time.now (), birth_time)) |
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243 |
^ " s -- " |
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|
244 |
^ (string_of_int o Time.toSeconds) (Time.- (dead_time, Time.now ())) |
28571 | 245 |
^ " s to live:\n" ^ desc |
246 |
fun cancelling_info (_, (_, dead_time, desc)) = "Trying to interrupt thread since " |
|
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247 |
^ (string_of_int o Time.toSeconds) (Time.- (Time.now (), dead_time)) |
28571 | 248 |
^ " s:\n" ^ desc |
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249 |
|
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250 |
val running = |
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|
251 |
if null active then "No ATPs running." |
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|
252 |
else space_implode "\n\n" ("Running ATPs:" :: map running_info active) |
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|
253 |
val interrupting = |
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|
254 |
if null cancelling then "" |
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|
255 |
else space_implode "\n\n" |
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|
256 |
("Trying to interrupt the following ATPs:" :: map cancelling_info cancelling) |
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|
257 |
|
28582 | 258 |
in writeln (running ^ "\n" ^ interrupting) end; |
259 |
||
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|
260 |
fun messages opt_limit = |
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|
261 |
let |
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|
262 |
val limit = the_default message_display_limit opt_limit; |
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|
263 |
val State {messages = msgs, ...} = Synchronized.value state |
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|
264 |
val header = "Recent ATP messages" ^ |
f2b45eea6dac
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|
265 |
(if length msgs <= limit then ":" else " (" ^ string_of_int limit ^ " displayed):"); |
f2b45eea6dac
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|
266 |
in writeln (cat_lines (header :: "" :: #1 (chop limit msgs))) end; |
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|
267 |
|
28582 | 268 |
|
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|
269 |
|
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|
270 |
(** The Sledgehammer **) |
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|
271 |
|
28582 | 272 |
(* named provers *) |
28484 | 273 |
|
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|
274 |
type prover = int -> Proof.state -> bool * string; |
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|
275 |
|
28582 | 276 |
fun err_dup_prover name = error ("Duplicate prover: " ^ quote name); |
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|
277 |
|
28582 | 278 |
structure Provers = TheoryDataFun |
279 |
( |
|
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|
280 |
type T = (prover * stamp) Symtab.table |
28582 | 281 |
val empty = Symtab.empty |
282 |
val copy = I |
|
283 |
val extend = I |
|
284 |
fun merge _ tabs : T = Symtab.merge (eq_snd op =) tabs |
|
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|
285 |
handle Symtab.DUP dup => err_dup_prover dup |
28582 | 286 |
); |
28484 | 287 |
|
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|
288 |
fun add_prover name prover thy = |
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|
289 |
Provers.map (Symtab.update_new (name, (prover, stamp ()))) thy |
28582 | 290 |
handle Symtab.DUP dup => err_dup_prover dup; |
291 |
||
292 |
fun print_provers thy = Pretty.writeln |
|
293 |
(Pretty.strs ("external provers:" :: sort_strings (Symtab.keys (Provers.get thy)))); |
|
28571 | 294 |
|
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|
295 |
|
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296 |
(* start prover thread *) |
28484 | 297 |
|
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298 |
fun start_prover name birthtime deadtime i proof_state = |
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|
299 |
(case Symtab.lookup (Provers.get (Proof.theory_of proof_state)) name of |
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|
300 |
NONE => warning ("Unknown external prover: " ^ quote name) |
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|
301 |
| SOME (prover, _) => |
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|
302 |
let |
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|
303 |
val (ctxt, (_, goal)) = Proof.get_goal proof_state |
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|
304 |
val desc = |
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|
305 |
"external prover " ^ quote name ^ " for subgoal " ^ string_of_int i ^ ":\n" ^ |
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|
306 |
Syntax.string_of_term ctxt (Thm.term_of (Thm.cprem_of goal i)) |
67e3945b53f1
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|
307 |
val _ = SimpleThread.fork true (fn () => |
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|
308 |
let |
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|
309 |
val _ = register birthtime deadtime (Thread.self (), desc) |
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|
310 |
val result = prover i proof_state |
28835 | 311 |
handle ResHolClause.TOO_TRIVIAL |
312 |
=> (true, "Empty clause: Try this command: " ^ Markup.markup Markup.sendback "apply metis") |
|
313 |
| ERROR msg |
|
314 |
=> (false, "Error: " ^ msg) |
|
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|
315 |
val _ = priority (unregister result (Thread.self ())) |
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|
316 |
in () end handle Interrupt => ()) |
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|
317 |
in () end); |
28582 | 318 |
|
319 |
||
320 |
(* sledghammer for first subgoal *) |
|
321 |
||
322 |
fun sledgehammer names proof_state = |
|
323 |
let |
|
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|
324 |
val provers = |
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|
325 |
if null names then String.tokens (Symbol.is_ascii_blank o String.str) (get_atps ()) |
28582 | 326 |
else names |
327 |
val birthtime = Time.now () |
|
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|
328 |
val deadtime = Time.+ (birthtime, Time.fromSeconds (get_timeout ())) |
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|
329 |
in List.app (fn name => start_prover name birthtime deadtime 1 proof_state) provers end; |
28582 | 330 |
|
331 |
||
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changeset
|
332 |
|
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changeset
|
333 |
(** Isar command syntax **) |
28582 | 334 |
|
335 |
local structure K = OuterKeyword and P = OuterParse in |
|
336 |
||
337 |
val _ = |
|
338 |
OuterSyntax.improper_command "atp_kill" "kill all managed provers" K.diag |
|
28586
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changeset
|
339 |
(Scan.succeed (Toplevel.no_timing o Toplevel.imperative kill)); |
28582 | 340 |
|
341 |
val _ = |
|
342 |
OuterSyntax.improper_command "atp_info" "print information about managed provers" K.diag |
|
343 |
(Scan.succeed (Toplevel.no_timing o Toplevel.imperative info)); |
|
344 |
||
345 |
val _ = |
|
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diff
changeset
|
346 |
OuterSyntax.improper_command "atp_messages" "print recent messages issued by managed provers" K.diag |
f2b45eea6dac
added 'atp_messages' command, which displays recent messages synchronously;
wenzelm
parents:
28835
diff
changeset
|
347 |
(Scan.option (P.$$$ "(" |-- P.nat --| P.$$$ ")") >> |
f2b45eea6dac
added 'atp_messages' command, which displays recent messages synchronously;
wenzelm
parents:
28835
diff
changeset
|
348 |
(fn limit => Toplevel.no_timing o Toplevel.imperative (fn () => messages limit))); |
f2b45eea6dac
added 'atp_messages' command, which displays recent messages synchronously;
wenzelm
parents:
28835
diff
changeset
|
349 |
|
f2b45eea6dac
added 'atp_messages' command, which displays recent messages synchronously;
wenzelm
parents:
28835
diff
changeset
|
350 |
val _ = |
28582 | 351 |
OuterSyntax.improper_command "print_atps" "print external provers" K.diag |
352 |
(Scan.succeed (Toplevel.no_timing o Toplevel.unknown_theory o |
|
353 |
Toplevel.keep (print_provers o Toplevel.theory_of))); |
|
354 |
||
355 |
val _ = |
|
356 |
OuterSyntax.command "sledgehammer" "call all automatic theorem provers" K.diag |
|
357 |
(Scan.repeat P.xname >> (fn names => Toplevel.no_timing o Toplevel.unknown_proof o |
|
29112
f2b45eea6dac
added 'atp_messages' command, which displays recent messages synchronously;
wenzelm
parents:
28835
diff
changeset
|
358 |
Toplevel.keep ((sledgehammer names) o Toplevel.proof_of))); |
28582 | 359 |
|
360 |
end; |
|
361 |
||
362 |
end; |