author | wenzelm |
Fri, 12 Jul 2013 22:49:20 +0200 | |
changeset 52638 | c1adf8b2eccf |
parent 52607 | 33a133d50616 |
child 52696 | 38466f4f3483 |
permissions | -rw-r--r-- |
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(* Title: Pure/goal.ML |
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Author: Makarius |
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Goals in tactical theorem proving, with support for forked proofs. |
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*) |
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||
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signature BASIC_GOAL = |
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sig |
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val skip_proofs: bool Unsynchronized.ref |
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val parallel_proofs: int Unsynchronized.ref |
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val SELECT_GOAL: tactic -> int -> tactic |
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val PREFER_GOAL: tactic -> int -> tactic |
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val CONJUNCTS: tactic -> int -> tactic |
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val PRECISE_CONJUNCTS: int -> tactic -> int -> tactic |
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val PARALLEL_CHOICE: tactic list -> tactic |
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val PARALLEL_GOALS: tactic -> tactic |
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end; |
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signature GOAL = |
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sig |
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include BASIC_GOAL |
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val init: cterm -> thm |
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val protect: int -> thm -> thm |
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val conclude: thm -> thm |
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val check_finished: Proof.context -> thm -> thm |
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val finish: Proof.context -> thm -> thm |
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val norm_result: thm -> thm |
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val fork_params: {name: string, pos: Position.T, pri: int} -> (unit -> 'a) -> 'a future |
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val fork: int -> (unit -> 'a) -> 'a future |
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val peek_futures: int -> unit future list |
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val stable_futures: int-> bool |
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val reset_futures: unit -> Future.group list |
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val shutdown_futures: unit -> unit |
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val skip_proofs_enabled: unit -> bool |
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val future_enabled_level: int -> bool |
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val future_enabled: unit -> bool |
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val future_enabled_nested: int -> bool |
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val future_enabled_timing: Time.time -> bool |
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val future_result: Proof.context -> thm future -> term -> thm |
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val prove_internal: cterm list -> cterm -> (thm list -> tactic) -> thm |
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val is_schematic: term -> bool |
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val prove_multi: Proof.context -> string list -> term list -> term list -> |
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({prems: thm list, context: Proof.context} -> tactic) -> thm list |
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val prove_future: Proof.context -> string list -> term list -> term -> |
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({prems: thm list, context: Proof.context} -> tactic) -> thm |
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val prove: Proof.context -> string list -> term list -> term -> |
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({prems: thm list, context: Proof.context} -> tactic) -> thm |
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val prove_global_future: theory -> string list -> term list -> term -> |
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({prems: thm list, context: Proof.context} -> tactic) -> thm |
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val prove_global: theory -> string list -> term list -> term -> |
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({prems: thm list, context: Proof.context} -> tactic) -> thm |
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val prove_sorry: Proof.context -> string list -> term list -> term -> |
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({prems: thm list, context: Proof.context} -> tactic) -> thm |
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val prove_sorry_global: theory -> string list -> term list -> term -> |
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({prems: thm list, context: Proof.context} -> tactic) -> thm |
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val restrict: int -> int -> thm -> thm |
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val unrestrict: int -> thm -> thm |
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val conjunction_tac: int -> tactic |
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val precise_conjunction_tac: int -> int -> tactic |
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val recover_conjunction_tac: tactic |
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val norm_hhf_tac: int -> tactic |
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val assume_rule_tac: Proof.context -> int -> tactic |
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end; |
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structure Goal: GOAL = |
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struct |
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(** goals **) |
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(* |
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-------- (init) |
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C ==> #C |
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*) |
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val init = |
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let val A = #1 (Thm.dest_implies (Thm.cprop_of Drule.protectI)) |
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in fn C => Thm.instantiate ([], [(A, C)]) Drule.protectI end; |
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(* |
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A1 ==> ... ==> An ==> C |
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------------------------ (protect n) |
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A1 ==> ... ==> An ==> #C |
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*) |
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fun protect n th = Drule.comp_no_flatten (th, n) 1 Drule.protectI; |
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(* |
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A ==> ... ==> #C |
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---------------- (conclude) |
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A ==> ... ==> C |
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*) |
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fun conclude th = Drule.comp_no_flatten (th, Thm.nprems_of th) 1 Drule.protectD; |
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(* |
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#C |
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--- (finish) |
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C |
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*) |
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fun check_finished ctxt th = |
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if Thm.no_prems th then th |
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else |
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raise THM ("Proof failed.\n" ^ Pretty.string_of (Goal_Display.pretty_goal ctxt th), 0, [th]); |
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fun finish ctxt = check_finished ctxt #> conclude; |
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||
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(** results **) |
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(* normal form *) |
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val norm_result = |
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Drule.flexflex_unique |
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#> Raw_Simplifier.norm_hhf_protect |
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#> Thm.strip_shyps |
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#> Drule.zero_var_indexes; |
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(* forked proofs *) |
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local |
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val forked_proofs = |
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Synchronized.var "forked_proofs" |
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(0, []: Future.group list, Inttab.empty: unit future list Inttab.table); |
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fun count_forked i = |
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Synchronized.change forked_proofs (fn (m, groups, tab) => |
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let |
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val n = m + i; |
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val _ = Future.forked_proofs := n; |
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in (n, groups, tab) end); |
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fun register_forked id future = |
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Synchronized.change forked_proofs (fn (m, groups, tab) => |
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let |
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val groups' = Task_Queue.group_of_task (Future.task_of future) :: groups; |
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val tab' = Inttab.cons_list (id, Future.map (K ()) future) tab; |
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in (m, groups', tab') end); |
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138 |
|
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fun status task markups = |
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let val props = Markup.properties [(Markup.taskN, Task_Queue.str_of_task task)] |
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in Output.status (implode (map (Markup.markup_only o props) markups)) end; |
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|
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in |
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|
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fun fork_params {name, pos, pri} e = |
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uninterruptible (fn _ => Position.setmp_thread_data pos (fn () => |
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let |
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val id = the_default 0 (Position.parse_id pos); |
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val _ = count_forked 1; |
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val future = |
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(singleton o Future.forks) |
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{name = name, group = NONE, deps = [], pri = pri, interrupts = false} |
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(fn () => |
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let |
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val task = the (Future.worker_task ()); |
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val _ = status task [Markup.running]; |
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val result = |
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Exn.capture (Future.interruptible_task e) () |
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|> Future.identify_result pos; |
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val _ = status task [Markup.finished, Markup.joined]; |
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val _ = |
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(case result of |
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Exn.Res _ => () |
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| Exn.Exn exn => |
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if id = 0 orelse Exn.is_interrupt exn then () |
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else |
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|
168 |
(status task [Markup.failed]; |
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|
169 |
Output.report (Markup.markup_only Markup.bad); |
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|
170 |
List.app (Future.error_msg pos) (ML_Compiler.exn_messages_ids exn))); |
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|
171 |
val _ = count_forked ~1; |
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|
172 |
in Exn.release result end); |
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|
173 |
val _ = status (Future.task_of future) [Markup.forked]; |
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|
174 |
val _ = register_forked id future; |
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recover implicit thread position for status messages (cf. eca8acb42e4a);
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|
175 |
in future end)) (); |
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|
176 |
|
51605
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more explicit Goal.fork_params -- avoid implicit arguments via thread data;
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|
177 |
fun fork pri e = |
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|
178 |
fork_params {name = "Goal.fork", pos = Position.thread_data (), pri = pri} e; |
41677 | 179 |
|
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|
180 |
fun forked_count () = #1 (Synchronized.value forked_proofs); |
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|
181 |
|
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|
182 |
fun peek_futures id = |
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|
183 |
Inttab.lookup_list (#3 (Synchronized.value forked_proofs)) id; |
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|
184 |
|
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|
185 |
fun stable_futures id = |
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|
186 |
not (Par_Exn.is_interrupted (Future.join_results (peek_futures id))); |
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|
187 |
|
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more basic Goal.reset_futures as snapshot of implicit state;
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|
188 |
fun reset_futures () = |
51608 | 189 |
Synchronized.change_result forked_proofs (fn (_, groups, _) => |
50974
55f8bd61b029
added "tasks_proof" statistics, via slighly odd global reference Future.forked_proofs (NB: Future.report_status is intertwined with scheduler thread);
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|
190 |
(Future.forked_proofs := 0; (groups, (0, [], Inttab.empty)))); |
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|
191 |
|
51276 | 192 |
fun shutdown_futures () = |
193 |
(Future.shutdown (); |
|
194 |
(case map_filter Task_Queue.group_status (reset_futures ()) of |
|
195 |
[] => () |
|
196 |
| exns => raise Par_Exn.make exns)); |
|
197 |
||
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|
198 |
end; |
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|
199 |
|
41677 | 200 |
|
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parallelization of nested Isar proofs is subject to Goal.parallel_proofs_threshold;
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|
201 |
(* scheduling parameters *) |
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|
202 |
|
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|
203 |
val skip_proofs = Unsynchronized.ref false; |
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|
204 |
|
52499 | 205 |
fun skip_proofs_enabled () = |
206 |
let val skip = ! skip_proofs in |
|
207 |
if Proofterm.proofs_enabled () andalso skip then |
|
208 |
(warning "Proof terms enabled -- cannot skip proofs"; false) |
|
209 |
else skip |
|
210 |
end; |
|
211 |
||
32738 | 212 |
val parallel_proofs = Unsynchronized.ref 1; |
29448
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changeset
|
213 |
|
49012
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|
214 |
fun future_enabled_level n = |
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|
215 |
Multithreading.enabled () andalso ! parallel_proofs >= n andalso |
41703
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|
216 |
is_some (Future.worker_task ()); |
32061
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parallel_proofs: more fine-grained control with optional parallel checking of nested Isar proofs;
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changeset
|
217 |
|
49012
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|
218 |
fun future_enabled () = future_enabled_level 1; |
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|
219 |
|
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|
220 |
fun future_enabled_nested n = |
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changeset
|
221 |
future_enabled_level n andalso |
52104 | 222 |
forked_count () < |
223 |
Options.default_int "parallel_subproofs_saturation" * Multithreading.max_threads_value (); |
|
51423
e5f9a6d9ca82
clarified parallel_subproofs_saturation (blind guess) vs. parallel_subproofs_threshold (precient timing estimate);
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changeset
|
224 |
|
e5f9a6d9ca82
clarified parallel_subproofs_saturation (blind guess) vs. parallel_subproofs_threshold (precient timing estimate);
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changeset
|
225 |
fun future_enabled_timing t = |
52104 | 226 |
future_enabled () andalso |
227 |
Time.toReal t >= Options.default_real "parallel_subproofs_threshold"; |
|
29448
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added Goal.future_enabled abstraction -- now also checks that this is already
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diff
changeset
|
228 |
|
34b9652b2f45
added Goal.future_enabled abstraction -- now also checks that this is already
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changeset
|
229 |
|
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changeset
|
230 |
(* future_result *) |
28340 | 231 |
|
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renamed promise to future, tuned related interfaces;
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diff
changeset
|
232 |
fun future_result ctxt result prop = |
28340 | 233 |
let |
42360 | 234 |
val thy = Proof_Context.theory_of ctxt; |
28340 | 235 |
val _ = Context.reject_draft thy; |
236 |
val cert = Thm.cterm_of thy; |
|
237 |
val certT = Thm.ctyp_of thy; |
|
238 |
||
30473
e0b66c11e7e4
Assumption.all_prems_of, Assumption.all_assms_of;
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diff
changeset
|
239 |
val assms = Assumption.all_assms_of ctxt; |
28340 | 240 |
val As = map Thm.term_of assms; |
241 |
||
242 |
val xs = map Free (fold Term.add_frees (prop :: As) []); |
|
243 |
val fixes = map cert xs; |
|
244 |
||
245 |
val tfrees = fold Term.add_tfrees (prop :: As) []; |
|
246 |
val instT = map (fn (a, S) => (certT (TVar ((a, 0), S)), certT (TFree (a, S)))) tfrees; |
|
247 |
||
248 |
val global_prop = |
|
45344
e209da839ff4
added Logic.varify_types_global/unvarify_types_global, which avoids somewhat expensive Term.map_types;
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parents:
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diff
changeset
|
249 |
cert (Logic.varify_types_global (fold_rev Logic.all xs (Logic.list_implies (As, prop)))) |
32056
f4b74cbecdaf
future_result: explicitly impose Variable.sorts_of again;
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diff
changeset
|
250 |
|> Thm.weaken_sorts (Variable.sorts_of ctxt); |
28973
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parents:
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diff
changeset
|
251 |
val global_result = result |> Future.map |
33768
bba9eac8aa25
future_result: purge flexflex pairs, which should normally be trivial anyway -- prevent Thm.future_result from complaining about tpairs;
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parents:
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diff
changeset
|
252 |
(Drule.flexflex_unique #> |
bba9eac8aa25
future_result: purge flexflex pairs, which should normally be trivial anyway -- prevent Thm.future_result from complaining about tpairs;
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diff
changeset
|
253 |
Thm.adjust_maxidx_thm ~1 #> |
28973
c549650d1442
future proofs: pass actual futures to facilitate composite computations;
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parents:
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diff
changeset
|
254 |
Drule.implies_intr_list assms #> |
c549650d1442
future proofs: pass actual futures to facilitate composite computations;
wenzelm
parents:
28619
diff
changeset
|
255 |
Drule.forall_intr_list fixes #> |
36613
f3157c288aca
simplified primitive Thm.future: more direct theory check, do not hardwire strip_shyps here;
wenzelm
parents:
36610
diff
changeset
|
256 |
Thm.generalize (map #1 tfrees, []) 0 #> |
f3157c288aca
simplified primitive Thm.future: more direct theory check, do not hardwire strip_shyps here;
wenzelm
parents:
36610
diff
changeset
|
257 |
Thm.strip_shyps); |
28340 | 258 |
val local_result = |
32056
f4b74cbecdaf
future_result: explicitly impose Variable.sorts_of again;
wenzelm
parents:
30473
diff
changeset
|
259 |
Thm.future global_result global_prop |
50987
616789281413
always close derivation at the bottom of forked proofs (despite increased non-determinism of proof terms) -- improve parallel performance by avoiding dynamic dependency within large Isar proofs, e.g. Slicing/JinjaVM/SemanticsWF.thy in AFP/bf9b14cbc707;
wenzelm
parents:
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diff
changeset
|
260 |
|> Thm.close_derivation |
28340 | 261 |
|> Thm.instantiate (instT, []) |
262 |
|> Drule.forall_elim_list fixes |
|
263 |
|> fold (Thm.elim_implies o Thm.assume) assms; |
|
264 |
in local_result end; |
|
265 |
||
266 |
||
18027
09ab79d4e8e1
renamed Goal constant to prop, more general protect/unprotect interfaces;
wenzelm
parents:
17986
diff
changeset
|
267 |
|
09ab79d4e8e1
renamed Goal constant to prop, more general protect/unprotect interfaces;
wenzelm
parents:
17986
diff
changeset
|
268 |
(** tactical theorem proving **) |
09ab79d4e8e1
renamed Goal constant to prop, more general protect/unprotect interfaces;
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parents:
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diff
changeset
|
269 |
|
23356 | 270 |
(* prove_internal -- minimal checks, no normalization of result! *) |
20250
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prove: proper assumption context, more tactic arguments;
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parents:
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diff
changeset
|
271 |
|
23356 | 272 |
fun prove_internal casms cprop tac = |
20250
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parents:
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diff
changeset
|
273 |
(case SINGLE (tac (map Assumption.assume casms)) (init cprop) of |
32197 | 274 |
SOME th => Drule.implies_intr_list casms |
275 |
(finish (Syntax.init_pretty_global (Thm.theory_of_thm th)) th) |
|
38875
c7a66b584147
tuned messages: discontinued spurious full-stops (messages are occasionally composed unexpectedly);
wenzelm
parents:
38236
diff
changeset
|
276 |
| NONE => error "Tactic failed"); |
20250
c3f209752749
prove: proper assumption context, more tactic arguments;
wenzelm
parents:
20228
diff
changeset
|
277 |
|
c3f209752749
prove: proper assumption context, more tactic arguments;
wenzelm
parents:
20228
diff
changeset
|
278 |
|
51553
63327f679cff
more ambitious Goal.skip_proofs: covers Goal.prove forms as well, and do not insist in quick_and_dirty (for the sake of Isabelle/jEdit);
wenzelm
parents:
51552
diff
changeset
|
279 |
(* prove variations *) |
63327f679cff
more ambitious Goal.skip_proofs: covers Goal.prove forms as well, and do not insist in quick_and_dirty (for the sake of Isabelle/jEdit);
wenzelm
parents:
51552
diff
changeset
|
280 |
|
63327f679cff
more ambitious Goal.skip_proofs: covers Goal.prove forms as well, and do not insist in quick_and_dirty (for the sake of Isabelle/jEdit);
wenzelm
parents:
51552
diff
changeset
|
281 |
fun is_schematic t = |
63327f679cff
more ambitious Goal.skip_proofs: covers Goal.prove forms as well, and do not insist in quick_and_dirty (for the sake of Isabelle/jEdit);
wenzelm
parents:
51552
diff
changeset
|
282 |
Term.exists_subterm Term.is_Var t orelse |
63327f679cff
more ambitious Goal.skip_proofs: covers Goal.prove forms as well, and do not insist in quick_and_dirty (for the sake of Isabelle/jEdit);
wenzelm
parents:
51552
diff
changeset
|
283 |
Term.exists_type (Term.exists_subtype Term.is_TVar) t; |
17986 | 284 |
|
28340 | 285 |
fun prove_common immediate ctxt xs asms props tac = |
17980 | 286 |
let |
42360 | 287 |
val thy = Proof_Context.theory_of ctxt; |
26939
1035c89b4c02
moved global pretty/string_of functions from Sign to Syntax;
wenzelm
parents:
26713
diff
changeset
|
288 |
val string_of_term = Syntax.string_of_term ctxt; |
20056 | 289 |
|
51553
63327f679cff
more ambitious Goal.skip_proofs: covers Goal.prove forms as well, and do not insist in quick_and_dirty (for the sake of Isabelle/jEdit);
wenzelm
parents:
51552
diff
changeset
|
290 |
val schematic = exists is_schematic props; |
63327f679cff
more ambitious Goal.skip_proofs: covers Goal.prove forms as well, and do not insist in quick_and_dirty (for the sake of Isabelle/jEdit);
wenzelm
parents:
51552
diff
changeset
|
291 |
val future = future_enabled (); |
52499 | 292 |
val skip = not immediate andalso not schematic andalso future andalso skip_proofs_enabled (); |
51553
63327f679cff
more ambitious Goal.skip_proofs: covers Goal.prove forms as well, and do not insist in quick_and_dirty (for the sake of Isabelle/jEdit);
wenzelm
parents:
51552
diff
changeset
|
293 |
|
28355 | 294 |
val pos = Position.thread_data (); |
20250
c3f209752749
prove: proper assumption context, more tactic arguments;
wenzelm
parents:
20228
diff
changeset
|
295 |
fun err msg = cat_error msg |
c3f209752749
prove: proper assumption context, more tactic arguments;
wenzelm
parents:
20228
diff
changeset
|
296 |
("The error(s) above occurred for the goal statement:\n" ^ |
28355 | 297 |
string_of_term (Logic.list_implies (asms, Logic.mk_conjunction_list props)) ^ |
48992 | 298 |
(case Position.here pos of "" => "" | s => "\n" ^ s)); |
17980 | 299 |
|
20250
c3f209752749
prove: proper assumption context, more tactic arguments;
wenzelm
parents:
20228
diff
changeset
|
300 |
fun cert_safe t = Thm.cterm_of thy (Envir.beta_norm (Term.no_dummy_patterns t)) |
17980 | 301 |
handle TERM (msg, _) => err msg | TYPE (msg, _, _) => err msg; |
20250
c3f209752749
prove: proper assumption context, more tactic arguments;
wenzelm
parents:
20228
diff
changeset
|
302 |
val casms = map cert_safe asms; |
c3f209752749
prove: proper assumption context, more tactic arguments;
wenzelm
parents:
20228
diff
changeset
|
303 |
val cprops = map cert_safe props; |
17980 | 304 |
|
20250
c3f209752749
prove: proper assumption context, more tactic arguments;
wenzelm
parents:
20228
diff
changeset
|
305 |
val (prems, ctxt') = ctxt |
c3f209752749
prove: proper assumption context, more tactic arguments;
wenzelm
parents:
20228
diff
changeset
|
306 |
|> Variable.add_fixes_direct xs |
27218
4548c83cd508
prove: full Variable.declare_term, including constraints;
wenzelm
parents:
26939
diff
changeset
|
307 |
|> fold Variable.declare_term (asms @ props) |
26713
1c6181def1d0
prove_global: Variable.set_body true, pass context;
wenzelm
parents:
26628
diff
changeset
|
308 |
|> Assumption.add_assumes casms |
1c6181def1d0
prove_global: Variable.set_body true, pass context;
wenzelm
parents:
26628
diff
changeset
|
309 |
||> Variable.set_body true; |
28619
89f9dd800a22
prove_common: include all sorts from context into statement, check shyps of result;
wenzelm
parents:
28446
diff
changeset
|
310 |
val sorts = Variable.sorts_of ctxt'; |
17980 | 311 |
|
28619
89f9dd800a22
prove_common: include all sorts from context into statement, check shyps of result;
wenzelm
parents:
28446
diff
changeset
|
312 |
val stmt = Thm.weaken_sorts sorts (Conjunction.mk_conjunction_balanced cprops); |
28340 | 313 |
|
51553
63327f679cff
more ambitious Goal.skip_proofs: covers Goal.prove forms as well, and do not insist in quick_and_dirty (for the sake of Isabelle/jEdit);
wenzelm
parents:
51552
diff
changeset
|
314 |
fun tac' args st = |
63327f679cff
more ambitious Goal.skip_proofs: covers Goal.prove forms as well, and do not insist in quick_and_dirty (for the sake of Isabelle/jEdit);
wenzelm
parents:
51552
diff
changeset
|
315 |
if skip then ALLGOALS Skip_Proof.cheat_tac st before Skip_Proof.report ctxt |
63327f679cff
more ambitious Goal.skip_proofs: covers Goal.prove forms as well, and do not insist in quick_and_dirty (for the sake of Isabelle/jEdit);
wenzelm
parents:
51552
diff
changeset
|
316 |
else tac args st; |
28340 | 317 |
fun result () = |
51553
63327f679cff
more ambitious Goal.skip_proofs: covers Goal.prove forms as well, and do not insist in quick_and_dirty (for the sake of Isabelle/jEdit);
wenzelm
parents:
51552
diff
changeset
|
318 |
(case SINGLE (tac' {prems = prems, context = ctxt'}) (init stmt) of |
38875
c7a66b584147
tuned messages: discontinued spurious full-stops (messages are occasionally composed unexpectedly);
wenzelm
parents:
38236
diff
changeset
|
319 |
NONE => err "Tactic failed" |
28340 | 320 |
| SOME st => |
32197 | 321 |
let val res = finish ctxt' st handle THM (msg, _, _) => err msg in |
28619
89f9dd800a22
prove_common: include all sorts from context into statement, check shyps of result;
wenzelm
parents:
28446
diff
changeset
|
322 |
if Unify.matches_list thy [Thm.term_of stmt] [Thm.prop_of res] |
89f9dd800a22
prove_common: include all sorts from context into statement, check shyps of result;
wenzelm
parents:
28446
diff
changeset
|
323 |
then Thm.check_shyps sorts res |
28340 | 324 |
else err ("Proved a different theorem: " ^ string_of_term (Thm.prop_of res)) |
325 |
end); |
|
326 |
val res = |
|
51553
63327f679cff
more ambitious Goal.skip_proofs: covers Goal.prove forms as well, and do not insist in quick_and_dirty (for the sake of Isabelle/jEdit);
wenzelm
parents:
51552
diff
changeset
|
327 |
if immediate orelse schematic orelse not future orelse skip |
29088
95a239a5e055
future proofs: more robust check via Future.enabled;
wenzelm
parents:
28973
diff
changeset
|
328 |
then result () |
51222
8c3e5fb41139
improved scheduling of forked proofs, based on elapsed time estimate (from last run via session log file);
wenzelm
parents:
51118
diff
changeset
|
329 |
else future_result ctxt' (fork ~1 result) (Thm.term_of stmt); |
17980 | 330 |
in |
28340 | 331 |
Conjunction.elim_balanced (length props) res |
20290 | 332 |
|> map (Assumption.export false ctxt' ctxt) |
20056 | 333 |
|> Variable.export ctxt' ctxt |
20250
c3f209752749
prove: proper assumption context, more tactic arguments;
wenzelm
parents:
20228
diff
changeset
|
334 |
|> map Drule.zero_var_indexes |
17980 | 335 |
end; |
336 |
||
28341 | 337 |
val prove_multi = prove_common true; |
17980 | 338 |
|
28446
a01de3b3fa2e
renamed promise to future, tuned related interfaces;
wenzelm
parents:
28363
diff
changeset
|
339 |
fun prove_future ctxt xs asms prop tac = hd (prove_common false ctxt xs asms [prop] tac); |
51118
32a5994dd205
tuned signature -- legacy packages might want to fork proofs as well;
wenzelm
parents:
51110
diff
changeset
|
340 |
|
28340 | 341 |
fun prove ctxt xs asms prop tac = hd (prove_common true ctxt xs asms [prop] tac); |
20056 | 342 |
|
51118
32a5994dd205
tuned signature -- legacy packages might want to fork proofs as well;
wenzelm
parents:
51110
diff
changeset
|
343 |
fun prove_global_future thy xs asms prop tac = |
32a5994dd205
tuned signature -- legacy packages might want to fork proofs as well;
wenzelm
parents:
51110
diff
changeset
|
344 |
Drule.export_without_context (prove_future (Proof_Context.init_global thy) xs asms prop tac); |
32a5994dd205
tuned signature -- legacy packages might want to fork proofs as well;
wenzelm
parents:
51110
diff
changeset
|
345 |
|
20056 | 346 |
fun prove_global thy xs asms prop tac = |
42360 | 347 |
Drule.export_without_context (prove (Proof_Context.init_global thy) xs asms prop tac); |
18027
09ab79d4e8e1
renamed Goal constant to prop, more general protect/unprotect interfaces;
wenzelm
parents:
17986
diff
changeset
|
348 |
|
51551 | 349 |
fun prove_sorry ctxt xs asms prop tac = |
52059 | 350 |
if Config.get ctxt quick_and_dirty then |
51552
c713c9505f68
clarified Skip_Proof.cheat_tac: more standard tactic;
wenzelm
parents:
51551
diff
changeset
|
351 |
prove ctxt xs asms prop (fn _ => ALLGOALS Skip_Proof.cheat_tac) |
51551 | 352 |
else (if future_enabled () then prove_future else prove) ctxt xs asms prop tac; |
353 |
||
354 |
fun prove_sorry_global thy xs asms prop tac = |
|
355 |
Drule.export_without_context |
|
356 |
(prove_sorry (Proof_Context.init_global thy) xs asms prop tac); |
|
357 |
||
18027
09ab79d4e8e1
renamed Goal constant to prop, more general protect/unprotect interfaces;
wenzelm
parents:
17986
diff
changeset
|
358 |
|
17980 | 359 |
|
21687 | 360 |
(** goal structure **) |
361 |
||
52458
210bca64b894
less intrusive SELECT_GOAL: merely rearrange subgoals without detaching goal state, and thus preserve maxidx context;
wenzelm
parents:
52456
diff
changeset
|
362 |
(* rearrange subgoals *) |
210bca64b894
less intrusive SELECT_GOAL: merely rearrange subgoals without detaching goal state, and thus preserve maxidx context;
wenzelm
parents:
52456
diff
changeset
|
363 |
|
210bca64b894
less intrusive SELECT_GOAL: merely rearrange subgoals without detaching goal state, and thus preserve maxidx context;
wenzelm
parents:
52456
diff
changeset
|
364 |
fun restrict i n st = |
210bca64b894
less intrusive SELECT_GOAL: merely rearrange subgoals without detaching goal state, and thus preserve maxidx context;
wenzelm
parents:
52456
diff
changeset
|
365 |
if i < 1 orelse n < 1 orelse i + n - 1 > Thm.nprems_of st |
210bca64b894
less intrusive SELECT_GOAL: merely rearrange subgoals without detaching goal state, and thus preserve maxidx context;
wenzelm
parents:
52456
diff
changeset
|
366 |
then raise THM ("Goal.restrict", i, [st]) |
210bca64b894
less intrusive SELECT_GOAL: merely rearrange subgoals without detaching goal state, and thus preserve maxidx context;
wenzelm
parents:
52456
diff
changeset
|
367 |
else rotate_prems (i - 1) st |> protect n; |
210bca64b894
less intrusive SELECT_GOAL: merely rearrange subgoals without detaching goal state, and thus preserve maxidx context;
wenzelm
parents:
52456
diff
changeset
|
368 |
|
210bca64b894
less intrusive SELECT_GOAL: merely rearrange subgoals without detaching goal state, and thus preserve maxidx context;
wenzelm
parents:
52456
diff
changeset
|
369 |
fun unrestrict i = conclude #> rotate_prems (1 - i); |
210bca64b894
less intrusive SELECT_GOAL: merely rearrange subgoals without detaching goal state, and thus preserve maxidx context;
wenzelm
parents:
52456
diff
changeset
|
370 |
|
210bca64b894
less intrusive SELECT_GOAL: merely rearrange subgoals without detaching goal state, and thus preserve maxidx context;
wenzelm
parents:
52456
diff
changeset
|
371 |
(*with structural marker*) |
17980 | 372 |
fun SELECT_GOAL tac i st = |
19191 | 373 |
if Thm.nprems_of st = 1 andalso i = 1 then tac st |
52458
210bca64b894
less intrusive SELECT_GOAL: merely rearrange subgoals without detaching goal state, and thus preserve maxidx context;
wenzelm
parents:
52456
diff
changeset
|
374 |
else (PRIMITIVE (restrict i 1) THEN tac THEN PRIMITIVE (unrestrict i)) st; |
210bca64b894
less intrusive SELECT_GOAL: merely rearrange subgoals without detaching goal state, and thus preserve maxidx context;
wenzelm
parents:
52456
diff
changeset
|
375 |
|
210bca64b894
less intrusive SELECT_GOAL: merely rearrange subgoals without detaching goal state, and thus preserve maxidx context;
wenzelm
parents:
52456
diff
changeset
|
376 |
(*without structural marker*) |
210bca64b894
less intrusive SELECT_GOAL: merely rearrange subgoals without detaching goal state, and thus preserve maxidx context;
wenzelm
parents:
52456
diff
changeset
|
377 |
fun PREFER_GOAL tac i st = |
210bca64b894
less intrusive SELECT_GOAL: merely rearrange subgoals without detaching goal state, and thus preserve maxidx context;
wenzelm
parents:
52456
diff
changeset
|
378 |
if i < 1 orelse i > Thm.nprems_of st then Seq.empty |
210bca64b894
less intrusive SELECT_GOAL: merely rearrange subgoals without detaching goal state, and thus preserve maxidx context;
wenzelm
parents:
52456
diff
changeset
|
379 |
else (PRIMITIVE (rotate_prems (i - 1)) THEN tac THEN PRIMITIVE (rotate_prems (1 - i))) st; |
17980 | 380 |
|
21687 | 381 |
|
382 |
(* multiple goals *) |
|
383 |
||
23418 | 384 |
fun precise_conjunction_tac 0 i = eq_assume_tac i |
385 |
| precise_conjunction_tac 1 i = SUBGOAL (K all_tac) i |
|
386 |
| precise_conjunction_tac n i = PRIMITIVE (Drule.with_subgoal i (Conjunction.curry_balanced n)); |
|
23414
927203ad4b3a
tuned conjunction tactics: slightly smaller proof terms;
wenzelm
parents:
23356
diff
changeset
|
387 |
|
23418 | 388 |
val adhoc_conjunction_tac = REPEAT_ALL_NEW |
389 |
(SUBGOAL (fn (goal, i) => |
|
390 |
if can Logic.dest_conjunction goal then rtac Conjunction.conjunctionI i |
|
391 |
else no_tac)); |
|
21687 | 392 |
|
23418 | 393 |
val conjunction_tac = SUBGOAL (fn (goal, i) => |
394 |
precise_conjunction_tac (length (Logic.dest_conjunctions goal)) i ORELSE |
|
395 |
TRY (adhoc_conjunction_tac i)); |
|
21687 | 396 |
|
23418 | 397 |
val recover_conjunction_tac = PRIMITIVE (fn th => |
398 |
Conjunction.uncurry_balanced (Thm.nprems_of th) th); |
|
23414
927203ad4b3a
tuned conjunction tactics: slightly smaller proof terms;
wenzelm
parents:
23356
diff
changeset
|
399 |
|
927203ad4b3a
tuned conjunction tactics: slightly smaller proof terms;
wenzelm
parents:
23356
diff
changeset
|
400 |
fun PRECISE_CONJUNCTS n tac = |
927203ad4b3a
tuned conjunction tactics: slightly smaller proof terms;
wenzelm
parents:
23356
diff
changeset
|
401 |
SELECT_GOAL (precise_conjunction_tac n 1 |
927203ad4b3a
tuned conjunction tactics: slightly smaller proof terms;
wenzelm
parents:
23356
diff
changeset
|
402 |
THEN tac |
23418 | 403 |
THEN recover_conjunction_tac); |
23414
927203ad4b3a
tuned conjunction tactics: slightly smaller proof terms;
wenzelm
parents:
23356
diff
changeset
|
404 |
|
21687 | 405 |
fun CONJUNCTS tac = |
406 |
SELECT_GOAL (conjunction_tac 1 |
|
407 |
THEN tac |
|
23418 | 408 |
THEN recover_conjunction_tac); |
21687 | 409 |
|
410 |
||
411 |
(* hhf normal form *) |
|
412 |
||
413 |
val norm_hhf_tac = |
|
414 |
rtac Drule.asm_rl (*cheap approximation -- thanks to builtin Logic.flatten_params*) |
|
415 |
THEN' SUBGOAL (fn (t, i) => |
|
416 |
if Drule.is_norm_hhf t then all_tac |
|
41228
e1fce873b814
renamed structure MetaSimplifier to raw_Simplifer, to emphasize its meaning;
wenzelm
parents:
39125
diff
changeset
|
417 |
else rewrite_goal_tac Drule.norm_hhf_eqs i); |
21687 | 418 |
|
23237 | 419 |
|
420 |
(* non-atomic goal assumptions *) |
|
421 |
||
23356 | 422 |
fun non_atomic (Const ("==>", _) $ _ $ _) = true |
423 |
| non_atomic (Const ("all", _) $ _) = true |
|
424 |
| non_atomic _ = false; |
|
425 |
||
23237 | 426 |
fun assume_rule_tac ctxt = norm_hhf_tac THEN' CSUBGOAL (fn (goal, i) => |
427 |
let |
|
42495
1af81b70cf09
clarified Variable.focus vs. Variable.focus_cterm -- eliminated clone;
wenzelm
parents:
42371
diff
changeset
|
428 |
val ((_, goal'), ctxt') = Variable.focus_cterm goal ctxt; |
23237 | 429 |
val goal'' = Drule.cterm_rule (singleton (Variable.export ctxt' ctxt)) goal'; |
23356 | 430 |
val Rs = filter (non_atomic o Thm.term_of) (Drule.strip_imp_prems goal''); |
23237 | 431 |
val tacs = Rs |> map (fn R => |
41228
e1fce873b814
renamed structure MetaSimplifier to raw_Simplifer, to emphasize its meaning;
wenzelm
parents:
39125
diff
changeset
|
432 |
Tactic.etac (Raw_Simplifier.norm_hhf (Thm.trivial R)) THEN_ALL_NEW assume_tac); |
23237 | 433 |
in fold_rev (curry op APPEND') tacs (K no_tac) i end); |
434 |
||
32365 | 435 |
|
52461
ef4c16887f83
more scalable PARALLEL_GOALS, using more elementary retrofit;
wenzelm
parents:
52458
diff
changeset
|
436 |
|
ef4c16887f83
more scalable PARALLEL_GOALS, using more elementary retrofit;
wenzelm
parents:
52458
diff
changeset
|
437 |
(** parallel tacticals **) |
32365 | 438 |
|
52461
ef4c16887f83
more scalable PARALLEL_GOALS, using more elementary retrofit;
wenzelm
parents:
52458
diff
changeset
|
439 |
(* parallel choice of single results *) |
ef4c16887f83
more scalable PARALLEL_GOALS, using more elementary retrofit;
wenzelm
parents:
52458
diff
changeset
|
440 |
|
32365 | 441 |
fun PARALLEL_CHOICE tacs st = |
442 |
(case Par_List.get_some (fn tac => SINGLE tac st) tacs of |
|
443 |
NONE => Seq.empty |
|
444 |
| SOME st' => Seq.single st'); |
|
445 |
||
52461
ef4c16887f83
more scalable PARALLEL_GOALS, using more elementary retrofit;
wenzelm
parents:
52458
diff
changeset
|
446 |
|
ef4c16887f83
more scalable PARALLEL_GOALS, using more elementary retrofit;
wenzelm
parents:
52458
diff
changeset
|
447 |
(* parallel refinement of non-schematic goal by single results *) |
ef4c16887f83
more scalable PARALLEL_GOALS, using more elementary retrofit;
wenzelm
parents:
52458
diff
changeset
|
448 |
|
ef4c16887f83
more scalable PARALLEL_GOALS, using more elementary retrofit;
wenzelm
parents:
52458
diff
changeset
|
449 |
local |
ef4c16887f83
more scalable PARALLEL_GOALS, using more elementary retrofit;
wenzelm
parents:
52458
diff
changeset
|
450 |
|
32788
a65deb8f9434
PARALLEL_GOALS: proper scope for exception FAILED, with dummy argument to prevent its interpretation as variable;
wenzelm
parents:
32738
diff
changeset
|
451 |
exception FAILED of unit; |
52461
ef4c16887f83
more scalable PARALLEL_GOALS, using more elementary retrofit;
wenzelm
parents:
52458
diff
changeset
|
452 |
|
ef4c16887f83
more scalable PARALLEL_GOALS, using more elementary retrofit;
wenzelm
parents:
52458
diff
changeset
|
453 |
fun retrofit st' = |
ef4c16887f83
more scalable PARALLEL_GOALS, using more elementary retrofit;
wenzelm
parents:
52458
diff
changeset
|
454 |
rotate_prems ~1 #> |
ef4c16887f83
more scalable PARALLEL_GOALS, using more elementary retrofit;
wenzelm
parents:
52458
diff
changeset
|
455 |
Thm.bicompose {flatten = false, match = false, incremented = false} |
ef4c16887f83
more scalable PARALLEL_GOALS, using more elementary retrofit;
wenzelm
parents:
52458
diff
changeset
|
456 |
(false, conclude st', Thm.nprems_of st') 1; |
ef4c16887f83
more scalable PARALLEL_GOALS, using more elementary retrofit;
wenzelm
parents:
52458
diff
changeset
|
457 |
|
ef4c16887f83
more scalable PARALLEL_GOALS, using more elementary retrofit;
wenzelm
parents:
52458
diff
changeset
|
458 |
in |
ef4c16887f83
more scalable PARALLEL_GOALS, using more elementary retrofit;
wenzelm
parents:
52458
diff
changeset
|
459 |
|
42370 | 460 |
fun PARALLEL_GOALS tac = |
461 |
Thm.adjust_maxidx_thm ~1 #> |
|
462 |
(fn st => |
|
42371
5900f06b4198
enable PARALLEL_GOALS more liberally, unlike forked proofs (cf. 34b9652b2f45);
wenzelm
parents:
42370
diff
changeset
|
463 |
if not (Multithreading.enabled ()) orelse Thm.maxidx_of st >= 0 orelse Thm.nprems_of st <= 1 |
42370 | 464 |
then DETERM tac st |
465 |
else |
|
466 |
let |
|
467 |
fun try_tac g = |
|
468 |
(case SINGLE tac g of |
|
469 |
NONE => raise FAILED () |
|
470 |
| SOME g' => g'); |
|
32365 | 471 |
|
42370 | 472 |
val goals = Drule.strip_imp_prems (Thm.cprop_of st); |
473 |
val results = Par_List.map (try_tac o init) goals; |
|
52461
ef4c16887f83
more scalable PARALLEL_GOALS, using more elementary retrofit;
wenzelm
parents:
52458
diff
changeset
|
474 |
in EVERY (map retrofit (rev results)) st end |
42370 | 475 |
handle FAILED () => Seq.empty); |
32365 | 476 |
|
18207 | 477 |
end; |
478 |
||
52461
ef4c16887f83
more scalable PARALLEL_GOALS, using more elementary retrofit;
wenzelm
parents:
52458
diff
changeset
|
479 |
end; |
ef4c16887f83
more scalable PARALLEL_GOALS, using more elementary retrofit;
wenzelm
parents:
52458
diff
changeset
|
480 |
|
32365 | 481 |
structure Basic_Goal: BASIC_GOAL = Goal; |
482 |
open Basic_Goal; |