author | wenzelm |
Thu, 15 Oct 2009 00:55:29 +0200 | |
changeset 32937 | 34f66c9dd8a2 |
parent 32936 | 9491bec20595 |
child 32938 | 63a364ed3f8d |
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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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 atps: string Unsynchronized.ref |
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val get_atps: unit -> string list |
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val max_atps: int Unsynchronized.ref |
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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 print_provers: theory -> unit |
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val get_prover: string -> theory -> ATP_Wrapper.prover option |
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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 max_atps = Unsynchronized.ref 5; (* ~1 means infinite number of 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 max_atps |
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"ATP: maximum number" "How many provers may run in parallel"); |
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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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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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fun lookup_thread xs = AList.lookup 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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datatype T = State of |
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{managing_thread: Thread.thread option, |
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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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store: string list}; |
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fun make_state managing_thread timeout_heap oldest_heap active cancelling messages store = |
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State {managing_thread = managing_thread, timeout_heap = timeout_heap, oldest_heap = oldest_heap, |
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active = active, cancelling = cancelling, messages = messages, store = store}; |
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val state = Synchronized.var "atp_manager" |
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(make_state NONE ThreadHeap.empty ThreadHeap.empty [] [] [] []); |
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(* unregister thread *) |
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fun unregister (success, message) thread = Synchronized.change state |
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(fn state as |
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State {managing_thread, timeout_heap, oldest_heap, active, cancelling, messages, store} => |
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(case lookup_thread active thread of |
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SOME (birthtime, _, description) => |
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let |
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val (group, active') = |
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if success then List.partition (fn (_, (tb, _, _)) => tb = birthtime) active |
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else List.partition (fn (th, _) => Thread.equal (th, thread)) active |
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val now = Time.now () |
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val cancelling' = |
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fold (fn (th, (tb, _, desc)) => update_thread (th, (tb, now, desc))) group cancelling |
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val message' = description ^ "\n" ^ message ^ |
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(if length group <= 1 then "" |
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else "\nInterrupted " ^ string_of_int (length group - 1) ^ " other group members") |
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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 |
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managing_thread timeout_heap oldest_heap active' cancelling' (message' :: messages) store' |
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end |
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| NONE => state)); |
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(* kill excessive atp threads *) |
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fun excessive_atps active = |
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let val max = ! 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 {managing_thread, timeout_heap, oldest_heap, active, cancelling, messages, store} => |
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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, |
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make_state managing_thread timeout_heap oldest_heap' active cancelling messages store) end) |
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|> unregister (false, "Interrupted (maximum number of ATPs exceeded)") |
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handle Unchanged => () |
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end; |
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in |
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fun kill_excessive () = |
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let val State {active, ...} = Synchronized.value state |
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in if excessive_atps active then (kill_oldest (); kill_excessive ()) else () end; |
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end; |
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fun print_new_messages () = |
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let val to_print = Synchronized.change_result state |
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(fn State {managing_thread, timeout_heap, oldest_heap, active, cancelling, messages, store} => |
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(messages, make_state managing_thread timeout_heap oldest_heap active cancelling [] store)) |
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in |
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if null to_print then () |
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else priority ("Sledgehammer: " ^ space_implode "\n\n" to_print) |
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end; |
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(* start a watching thread -- only one may exist *) |
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fun check_thread_manager () = Synchronized.change state |
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(fn State {managing_thread, timeout_heap, oldest_heap, active, cancelling, messages, store} => |
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if (case managing_thread of SOME thread => Thread.isActive thread | NONE => false) |
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then make_state managing_thread timeout_heap oldest_heap active cancelling messages store |
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171 |
else let val managing_thread = SOME (SimpleThread.fork false (fn () => |
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172 |
let |
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173 |
val min_wait_time = Time.fromMilliseconds 300 |
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val max_wait_time = Time.fromSeconds 10 |
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(* wait for next thread to cancel, or maximum*) |
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177 |
fun time_limit (State {timeout_heap, ...}) = |
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(case try ThreadHeap.min timeout_heap of |
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NONE => SOME (Time.+ (Time.now (), max_wait_time)) |
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180 |
| SOME (time, _) => SOME time) |
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182 |
(* action: find threads whose timeout is reached, and interrupt cancelling threads *) |
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183 |
fun action (State {managing_thread, timeout_heap, oldest_heap, active, cancelling, |
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184 |
messages, store}) = |
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185 |
let val (timeout_threads, timeout_heap') = |
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186 |
ThreadHeap.upto (Time.now (), Thread.self ()) timeout_heap |
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187 |
in |
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if null timeout_threads andalso null cancelling andalso not (excessive_atps active) |
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189 |
then NONE |
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190 |
else |
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191 |
let |
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192 |
val _ = List.app (SimpleThread.interrupt o #1) cancelling |
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193 |
val cancelling' = filter (Thread.isActive o #1) cancelling |
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194 |
val state' = make_state |
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195 |
managing_thread timeout_heap' oldest_heap active cancelling' messages store |
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196 |
in SOME (map #2 timeout_threads, state') end |
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197 |
end |
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198 |
in |
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199 |
while Synchronized.change_result state |
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200 |
(fn st as |
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201 |
State {managing_thread, timeout_heap, oldest_heap, active, cancelling, messages, store} => |
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202 |
if (null active) andalso (null cancelling) andalso (null messages) |
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203 |
then (false, make_state NONE timeout_heap oldest_heap active cancelling messages store) |
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204 |
else (true, st)) |
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205 |
do |
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206 |
(Synchronized.timed_access state time_limit action |
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207 |
|> these |
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208 |
|> List.app (unregister (false, "Interrupted (reached timeout)")); |
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209 |
kill_excessive (); |
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210 |
print_new_messages (); |
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211 |
(*give threads time to respond to interrupt*) |
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212 |
OS.Process.sleep min_wait_time) |
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213 |
end)) |
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214 |
in make_state managing_thread timeout_heap oldest_heap active cancelling messages store end); |
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|
216 |
||
217 |
(* thread is registered here by sledgehammer *) |
|
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218 |
|
28582 | 219 |
fun register birthtime deadtime (thread, desc) = |
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(Synchronized.change state |
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221 |
(fn State {managing_thread, timeout_heap, oldest_heap, active, cancelling, messages, store} => |
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222 |
let |
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223 |
val timeout_heap' = ThreadHeap.insert (deadtime, thread) timeout_heap |
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224 |
val oldest_heap' = ThreadHeap.insert (birthtime, thread) oldest_heap |
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225 |
val active' = update_thread (thread, (birthtime, deadtime, desc)) active |
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226 |
in make_state managing_thread timeout_heap' oldest_heap' active' cancelling messages store end); |
30798 | 227 |
check_thread_manager ()); |
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228 |
|
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229 |
|
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230 |
|
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231 |
(** user commands **) |
28582 | 232 |
|
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233 |
(* kill: move all threads to cancelling *) |
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234 |
|
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235 |
fun kill () = Synchronized.change state |
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236 |
(fn State {managing_thread, timeout_heap, oldest_heap, active, cancelling, messages, store} => |
28582 | 237 |
let val formerly_active = map (fn (th, (tb, _, desc)) => (th, (tb, Time.now (), desc))) active |
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238 |
in make_state |
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|
239 |
managing_thread timeout_heap oldest_heap [] (formerly_active @ cancelling) messages store |
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240 |
end); |
28582 | 241 |
|
242 |
||
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243 |
(* ATP info *) |
28582 | 244 |
|
245 |
fun info () = |
|
246 |
let |
|
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247 |
val State {active, cancelling, ...} = Synchronized.value state |
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248 |
|
28571 | 249 |
fun running_info (_, (birth_time, dead_time, desc)) = "Running: " |
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250 |
^ (string_of_int o Time.toSeconds) (Time.- (Time.now (), birth_time)) |
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251 |
^ " s -- " |
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252 |
^ (string_of_int o Time.toSeconds) (Time.- (dead_time, Time.now ())) |
28571 | 253 |
^ " s to live:\n" ^ desc |
254 |
fun cancelling_info (_, (_, dead_time, desc)) = "Trying to interrupt thread since " |
|
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255 |
^ (string_of_int o Time.toSeconds) (Time.- (Time.now (), dead_time)) |
28571 | 256 |
^ " s:\n" ^ desc |
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257 |
|
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258 |
val running = |
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259 |
if null active then "No ATPs running." |
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260 |
else space_implode "\n\n" ("Running ATPs:" :: map running_info active) |
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261 |
val interrupting = |
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262 |
if null cancelling then "" |
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263 |
else space_implode "\n\n" |
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|
264 |
("Trying to interrupt the following ATPs:" :: map cancelling_info cancelling) |
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|
265 |
|
28582 | 266 |
in writeln (running ^ "\n" ^ interrupting) end; |
267 |
||
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268 |
fun messages opt_limit = |
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269 |
let |
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270 |
val limit = the_default message_display_limit opt_limit; |
29620 | 271 |
val State {store = msgs, ...} = Synchronized.value state |
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272 |
val header = "Recent ATP messages" ^ |
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|
273 |
(if length msgs <= limit then ":" else " (" ^ string_of_int limit ^ " displayed):"); |
29116 | 274 |
in writeln (space_implode "\n\n" (header :: #1 (chop limit msgs))) end; |
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|
275 |
|
28582 | 276 |
|
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277 |
|
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|
278 |
(** The Sledgehammer **) |
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279 |
|
28582 | 280 |
(* named provers *) |
28484 | 281 |
|
28582 | 282 |
fun err_dup_prover name = error ("Duplicate prover: " ^ quote name); |
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283 |
|
28582 | 284 |
structure Provers = TheoryDataFun |
285 |
( |
|
32936 | 286 |
type T = (ATP_Wrapper.prover * stamp) Symtab.table |
28582 | 287 |
val empty = Symtab.empty |
288 |
val copy = I |
|
289 |
val extend = I |
|
290 |
fun merge _ tabs : T = Symtab.merge (eq_snd op =) tabs |
|
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291 |
handle Symtab.DUP dup => err_dup_prover dup |
28582 | 292 |
); |
28484 | 293 |
|
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294 |
fun add_prover (name, prover) thy = |
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295 |
Provers.map (Symtab.update_new (name, (prover, stamp ()))) thy |
28582 | 296 |
handle Symtab.DUP dup => err_dup_prover dup; |
297 |
||
298 |
fun print_provers thy = Pretty.writeln |
|
299 |
(Pretty.strs ("external provers:" :: sort_strings (Symtab.keys (Provers.get thy)))); |
|
28571 | 300 |
|
32863 | 301 |
fun get_prover name thy = |
302 |
(case Symtab.lookup (Provers.get thy) name of |
|
303 |
NONE => NONE |
|
304 |
| SOME (prover, _) => SOME prover); |
|
305 |
||
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306 |
|
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307 |
(* start prover thread *) |
28484 | 308 |
|
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309 |
fun start_prover name birthtime deadtime i proof_state = |
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310 |
(case get_prover name (Proof.theory_of proof_state) of |
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311 |
NONE => warning ("Unknown external prover: " ^ quote name) |
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312 |
| SOME prover => |
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313 |
let |
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314 |
val (ctxt, (_, goal)) = Proof.get_goal proof_state |
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|
315 |
val desc = |
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316 |
"external prover " ^ quote name ^ " for subgoal " ^ string_of_int i ^ ":\n" ^ |
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317 |
Syntax.string_of_term ctxt (Thm.term_of (Thm.cprem_of goal i)) |
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318 |
val _ = SimpleThread.fork true (fn () => |
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319 |
let |
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320 |
val _ = register birthtime deadtime (Thread.self (), desc) |
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321 |
val problem = |
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322 |
ATP_Wrapper.atp_problem_of_goal (! full_types) i (Proof.get_goal proof_state) |
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323 |
val result = |
32936 | 324 |
let val ATP_Wrapper.Prover_Result {success, message, ...} = |
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325 |
prover problem (! timeout) |
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326 |
in (success, message) end |
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327 |
handle ResHolClause.TOO_TRIVIAL => (* FIXME !? *) |
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328 |
(true, "Empty clause: Try this command: " ^ |
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329 |
Markup.markup Markup.sendback "apply metis") |
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330 |
| ERROR msg => (false, "Error: " ^ msg) |
29620 | 331 |
val _ = unregister result (Thread.self ()) |
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332 |
in () end handle Interrupt => ()) |
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333 |
in () end); |
28582 | 334 |
|
335 |
||
336 |
(* sledghammer for first subgoal *) |
|
337 |
||
338 |
fun sledgehammer names proof_state = |
|
339 |
let |
|
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340 |
val provers = if null names then get_atps () else names |
28582 | 341 |
val birthtime = Time.now () |
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changeset
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342 |
val deadtime = Time.+ (birthtime, Time.fromSeconds (! timeout)) |
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343 |
in List.app (fn name => start_prover name birthtime deadtime 1 proof_state) provers end; |
28582 | 344 |
|
345 |
||
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|
346 |
|
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|
347 |
(** Isar command syntax **) |
28582 | 348 |
|
349 |
local structure K = OuterKeyword and P = OuterParse in |
|
350 |
||
351 |
val _ = |
|
352 |
OuterSyntax.improper_command "atp_kill" "kill all managed provers" K.diag |
|
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353 |
(Scan.succeed (Toplevel.no_timing o Toplevel.imperative kill)); |
28582 | 354 |
|
355 |
val _ = |
|
356 |
OuterSyntax.improper_command "atp_info" "print information about managed provers" K.diag |
|
357 |
(Scan.succeed (Toplevel.no_timing o Toplevel.imperative info)); |
|
358 |
||
359 |
val _ = |
|
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|
360 |
OuterSyntax.improper_command "atp_messages" "print recent messages issued by managed provers" K.diag |
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|
361 |
(Scan.option (P.$$$ "(" |-- P.nat --| P.$$$ ")") >> |
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|
362 |
(fn limit => Toplevel.no_timing o Toplevel.imperative (fn () => messages limit))); |
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|
363 |
|
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changeset
|
364 |
val _ = |
28582 | 365 |
OuterSyntax.improper_command "print_atps" "print external provers" K.diag |
366 |
(Scan.succeed (Toplevel.no_timing o Toplevel.unknown_theory o |
|
367 |
Toplevel.keep (print_provers o Toplevel.theory_of))); |
|
368 |
||
369 |
val _ = |
|
370 |
OuterSyntax.command "sledgehammer" "call all automatic theorem provers" K.diag |
|
371 |
(Scan.repeat P.xname >> (fn names => Toplevel.no_timing o Toplevel.unknown_proof o |
|
30800 | 372 |
Toplevel.keep (sledgehammer names o Toplevel.proof_of))); |
28582 | 373 |
|
374 |
end; |
|
375 |
||
376 |
end; |
|
30537 | 377 |