author  blanchet 
Fri, 23 Apr 2010 16:15:35 +0200  
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(* Title: HOL/Tools/ATP_Manager/atp_wrapper.ML 
28592  2 
Author: Fabian Immler, TU Muenchen 
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Author: Jasmin Blanchette, TU Muenchen 
28592  4 

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Wrapper functions for external ATPs. 

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*) 

7 

8 
signature ATP_WRAPPER = 

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sig 

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type prover = ATP_Manager.prover 
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(* hooks for problem files *) 
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val destdir : string Config.T 

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val problem_prefix : string Config.T 

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val measure_runtime : bool Config.T 

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val refresh_systems_on_tptp : unit > unit 
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val default_atps_param_value : unit > string 
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val setup : theory > theory 
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end; 
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35865  22 
structure ATP_Wrapper : ATP_WRAPPER = 
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struct 
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36187  25 
open Sledgehammer_Util 
35969  26 
open Sledgehammer_Fact_Preprocessor 
35865  27 
open Sledgehammer_HOL_Clause 
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open Sledgehammer_Fact_Filter 

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open Sledgehammer_Proof_Reconstruct 

35867  30 
open ATP_Manager 
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(** generic ATP wrapper **) 
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(* external problem files *) 
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val (destdir, destdir_setup) = Attrib.config_string "atp_destdir" (K ""); 
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(*Empty string means create files in Isabelle's temporary files directory.*) 
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val (problem_prefix, problem_prefix_setup) = 
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Attrib.config_string "atp_problem_prefix" (K "prob"); 
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val (measure_runtime, measure_runtime_setup) = 
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Attrib.config_bool "atp_measure_runtime" (K false); 
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(* prover configuration *) 
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type prover_config = 
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{home: string, 
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executable: string, 
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arguments: Time.time > string, 
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proof_delims: (string * string) list, 
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known_failures: (failure * string) list, 
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max_new_clauses: int, 
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prefers_theory_relevant: bool}; 
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(* basic template *) 
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val remotify = prefix "remote_" 
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fun with_path cleanup after f path = 
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Exn.capture f path 
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> tap (fn _ => cleanup path) 
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> Exn.release 
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> tap (after path) 
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(* Splits by the first possible of a list of delimiters. *) 
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fun extract_proof delims output = 
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case pairself (find_first (fn s => String.isSubstring s output)) 
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(ListPair.unzip delims) of 
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(SOME begin_delim, SOME end_delim) => 
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output > first_field begin_delim > the > snd 
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> first_field end_delim > the > fst 
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 _ => "" 
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fun extract_proof_and_outcome res_code proof_delims known_failures output = 
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case map_filter (fn (failure, pattern) => 
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if String.isSubstring pattern output then SOME failure 
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else NONE) known_failures of 
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[] => (case extract_proof proof_delims output of 
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"" => ("", SOME UnknownError) 
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 proof => if res_code = 0 then (proof, NONE) 
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else ("", SOME UnknownError)) 
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 (failure :: _) => ("", SOME failure) 
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fun string_for_failure Unprovable = "The ATP problem is unprovable." 
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 string_for_failure TimedOut = "Timed out." 
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 string_for_failure OutOfResources = "The ATP ran out of resources." 
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 string_for_failure OldSpass = 
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"Warning: Sledgehammer requires a more recent version of SPASS with \ 
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\support for the TPTP syntax. To install it, download and untar the \ 
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\package \"http://isabelle.in.tum.de/~blanchet/spass3.7.tgz\" and add the \ 
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\\"spass3.7\" directory's full path to \"" ^ 
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Path.implode (Path.expand (Path.appends 
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(Path.variable "ISABELLE_HOME_USER" :: 
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map Path.basic ["etc", "components"]))) ^ 
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"\" on a line of its own." 
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 string_for_failure MalformedOutput = "Error: The ATP output is malformed." 
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 string_for_failure UnknownError = "Error: An unknown ATP error occurred." 
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fun generic_prover overlord get_facts prepare write_file home executable args 
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proof_delims known_failures name 
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({debug, full_types, explicit_apply, isar_proof, modulus, sorts, ...} 
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: params) minimize_command 
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({subgoal, goal, relevance_override, axiom_clauses, filtered_clauses} 
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: problem) = 

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let 
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(* get clauses and prepare them for writing *) 
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val (ctxt, (chain_ths, th)) = goal; 
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val thy = ProofContext.theory_of ctxt; 
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val chain_ths = map (Thm.put_name_hint chained_hint) chain_ths; 
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val goal_cls = #1 (neg_conjecture_clauses ctxt th subgoal); 
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val the_filtered_clauses = 
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(case filtered_clauses of 
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NONE => get_facts relevance_override goal goal_cls 
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 SOME fcls => fcls); 
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val the_axiom_clauses = 
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(case axiom_clauses of 
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NONE => the_filtered_clauses 
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 SOME axcls => axcls); 
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val (internal_thm_names, clauses) = 
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prepare goal_cls chain_ths the_axiom_clauses the_filtered_clauses thy; 
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(* path to unique problem file *) 
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val destdir' = if overlord then getenv "ISABELLE_HOME_USER" 
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else Config.get ctxt destdir; 
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val problem_prefix' = Config.get ctxt problem_prefix; 
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fun prob_pathname nr = 
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let 
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val probfile = 
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Path.basic (problem_prefix' ^ 
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(if overlord then "_" ^ name else serial_string ()) 
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^ "_" ^ string_of_int nr) 
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in 
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if destdir' = "" then File.tmp_path probfile 
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else if File.exists (Path.explode destdir') 
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then Path.append (Path.explode destdir') probfile 
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else error ("No such directory: " ^ destdir' ^ ".") 
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end; 
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val command = Path.explode (home ^ "/" ^ executable) 
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(* write out problem file and call prover *) 
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fun command_line probfile = 
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(if Config.get ctxt measure_runtime then 
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"TIMEFORMAT='%3U'; { time " ^ 
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space_implode " " [File.shell_path command, args, 
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File.shell_path probfile] ^ " ; } 2>&1" 
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else 
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space_implode " " ["exec", File.shell_path command, args, 
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File.shell_path probfile, "2>&1"]) ^ 
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(if overlord then 
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"  sed 's/,/, /g' \ 
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\ sed 's/\\([^!=]\\)\\([=]\\)\\([^=]\\)/\\1 \\2 \\3/g' \ 
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\ sed 's/! =/ !=/g' \ 
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\ sed 's/ / /g'  sed 's/ //g' \ 
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\ sed 's/ = = =/===/g' \ 
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\ sed 's/= = /== /g'" 
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else 
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"") 
32510  161 
fun split_time s = 
162 
let 

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val split = String.tokens (fn c => str c = "\n"); 
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val (output, t) = s > split > split_last > apfst cat_lines; 
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fun as_num f = f >> (fst o read_int); 
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val num = as_num (Scan.many1 Symbol.is_ascii_digit); 
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val digit = Scan.one Symbol.is_ascii_digit; 
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val num3 = as_num (digit ::: digit ::: (digit >> single)); 
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val time = num  Scan.$$ "."  num3 >> (fn (a, b) => a * 1000 + b); 
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val as_time = the_default 0 o Scan.read Symbol.stopper time o explode; 
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in (output, as_time t) end; 
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fun split_time' s = 
173 
if Config.get ctxt measure_runtime then split_time s else (s, 0) 

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fun run_on probfile = 
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if File.exists command then 
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write_file full_types explicit_apply probfile clauses 
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> pair (apfst split_time' (bash_output (command_line probfile))) 
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else error ("Bad executable: " ^ Path.implode command ^ "."); 
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(* If the problem file has not been exported, remove it; otherwise, export 
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the proof file too. *) 
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fun cleanup probfile = if destdir' = "" then try File.rm probfile else NONE; 
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fun export probfile (((output, _), _), _) = 
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if destdir' = "" then 
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() 

186 
else 

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File.write (Path.explode (Path.implode probfile ^ "_proof")) 

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((if overlord then 
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"% " ^ command_line probfile ^ "\n% " ^ timestamp () ^ 
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"\n" 
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else 
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"") ^ output) 
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val (((output, atp_run_time_in_msecs), res_code), _) = 
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with_path cleanup export run_on (prob_pathname subgoal); 
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(* Check for success and print out some information on failure. *) 
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val (proof, outcome) = 
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extract_proof_and_outcome res_code proof_delims known_failures output 
35969  200 
val (message, relevant_thm_names) = 
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case outcome of 
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NONE => proof_text isar_proof debug modulus sorts ctxt 
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(minimize_command, proof, internal_thm_names, th, 
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subgoal) 
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 SOME failure => (string_for_failure failure ^ "\n", []) 
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in 
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{outcome = outcome, message = message, 
35969  208 
relevant_thm_names = relevant_thm_names, 
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atp_run_time_in_msecs = atp_run_time_in_msecs, output = output, 
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proof = proof, internal_thm_names = internal_thm_names, 
35969  211 
filtered_clauses = the_filtered_clauses} 
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end; 
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(* generic TPTPbased provers *) 
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35865  217 
fun generic_tptp_prover 
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(name, {home, executable, arguments, proof_delims, known_failures, 
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max_new_clauses, prefers_theory_relevant}) 
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(params as {debug, overlord, respect_no_atp, relevance_threshold, 
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convergence, theory_relevant, higher_order, follow_defs, 
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isar_proof, ...}) 
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minimize_command timeout = 
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generic_prover overlord 
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(get_relevant_facts respect_no_atp relevance_threshold convergence 
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(the_default prefers_theory_relevant theory_relevant)) 
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(prepare_clauses higher_order false) 
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(write_tptp_file (debug andalso overlord andalso not isar_proof)) home 
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executable (arguments timeout) proof_delims known_failures name params 
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minimize_command 
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35969  233 
fun tptp_prover name p = (name, generic_tptp_prover (name, p)); 
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234 

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235 

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(** common provers **) 
28592  237 

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fun generous_to_secs time = (Time.toMilliseconds time + 999) div 1000 
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239 

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(* Vampire *) 
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241 

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(* Vampire requires an explicit time limit. *) 
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243 

35969  244 
val vampire_config : prover_config = 
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{home = getenv "VAMPIRE_HOME", 
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executable = "vampire", 
35969  247 
arguments = (fn timeout => "output_syntax tptp mode casc t " ^ 
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string_of_int (generous_to_secs timeout)), 
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proof_delims = [("=========== Refutation ==========", 
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"======= End of refutation =======")], 
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known_failures = 
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[(Unprovable, "Satisfiability detected"), 
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253 
(OutOfResources, "CANNOT PROVE"), 
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(OutOfResources, "Refutation not found")], 
35969  255 
max_new_clauses = 60, 
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prefers_theory_relevant = false} 
35969  257 
val vampire = tptp_prover "vampire" vampire_config 
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28592  259 

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(* E prover *) 
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261 

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val tstp_proof_delims = 
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263 
("# SZS output start CNFRefutation.", "# SZS output end CNFRefutation") 
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264 

35969  265 
val e_config : prover_config = 
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{home = getenv "E_HOME", 
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executable = "eproof", 
35969  268 
arguments = (fn timeout => "tstpin tstpout l5 xAutoDev \ 
269 
\tAutoDev silent cpulimit=" ^ 

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string_of_int (generous_to_secs timeout)), 
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proof_delims = [tstp_proof_delims], 
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known_failures = 
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[(Unprovable, "SZS status: Satisfiable"), 
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(Unprovable, "SZS status Satisfiable"), 
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(TimedOut, "Failure: Resource limit exceeded (time)"), 
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(TimedOut, "time limit exceeded"), 
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(OutOfResources, 
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"# Cannot determine problem status within resource limit"), 
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(OutOfResources, "SZS status: ResourceOut"), 
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(OutOfResources, "SZS status ResourceOut")], 
35969  281 
max_new_clauses = 100, 
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282 
prefers_theory_relevant = false} 
35969  283 
val e = tptp_prover "e" e_config 
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284 

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285 

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286 
(* SPASS *) 
28592  287 

35865  288 
fun generic_dfg_prover 
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(name, {home, executable, arguments, proof_delims, known_failures, 
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290 
max_new_clauses, prefers_theory_relevant}) 
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291 
(params as {overlord, respect_no_atp, relevance_threshold, convergence, 
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theory_relevant, higher_order, follow_defs, ...}) 
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minimize_command timeout = 
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294 
generic_prover overlord 
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295 
(get_relevant_facts respect_no_atp relevance_threshold convergence 
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296 
higher_order follow_defs max_new_clauses 
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297 
(the_default prefers_theory_relevant theory_relevant)) 
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298 
(prepare_clauses higher_order true) write_dfg_file home executable 
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299 
(arguments timeout) proof_delims known_failures name params 
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300 
minimize_command 
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301 

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302 
fun dfg_prover name p = (name, generic_dfg_prover (name, p)) 
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303 

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304 
(* The "VarWeight=3" option helps the higherorder problems, probably by 
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305 
counteracting the presence of "hAPP". *) 
36059  306 
val spass_config : prover_config = 
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307 
{home = getenv "SPASS_HOME", 
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308 
executable = "SPASS", 
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309 
arguments = (fn timeout => "Auto SOS=1 PGiven=0 PProblem=0 Splits=0" ^ 
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310 
" FullRed=0 DocProof VarWeight=3 TimeLimit=" ^ 
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311 
string_of_int (generous_to_secs timeout)), 
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312 
proof_delims = [("Here is a proof", "Formulae used in the proof")], 
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313 
known_failures = 
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314 
[(Unprovable, "SPASS beiseite: Completion found"), 
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315 
(TimedOut, "SPASS beiseite: Ran out of time"), 
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316 
(OutOfResources, "SPASS beiseite: Maximal number of loops exceeded")], 
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317 
max_new_clauses = 40, 
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318 
prefers_theory_relevant = true} 
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319 
val spass = dfg_prover "spass" spass_config 
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320 

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321 
(* SPASS 3.7 supports both the DFG and the TPTP syntax, whereas SPASS 3.0 
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322 
supports only the DFG syntax. As soon as all Isabelle repository/snapshot 
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323 
users have upgraded to 3.7, we can kill "spass" (and all DFG support in 
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324 
Sledgehammer) and rename "spass_tptp" "spass". *) 
35969  325 

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326 
(* FIXME: Change the error message below to point to the Isabelle download 
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327 
page once the package is there (around the Isabelle2010 release). *) 
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328 

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329 
val spass_tptp_config = 
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330 
{home = #home spass_config, 
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331 
executable = #executable spass_config, 
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332 
arguments = prefix "TPTP " o #arguments spass_config, 
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333 
proof_delims = #proof_delims spass_config, 
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334 
known_failures = 
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335 
#known_failures spass_config @ 
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336 
[(OldSpass, "unrecognized option `TPTP'"), 
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337 
(OldSpass, "Unrecognized option TPTP")], 
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338 
max_new_clauses = #max_new_clauses spass_config, 
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339 
prefers_theory_relevant = #prefers_theory_relevant spass_config} 
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340 
val spass_tptp = tptp_prover "spass_tptp" spass_tptp_config 
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341 

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342 
(* remote prover invocation via SystemOnTPTP *) 
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343 

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344 
val systems = Synchronized.var "atp_wrapper_systems" ([]: string list); 
31835  345 

346 
fun get_systems () = 

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347 
case bash_output "\"$ISABELLE_ATP_MANAGER/SystemOnTPTP\" w" of 
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348 
(answer, 0) => split_lines answer 
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349 
 (answer, _) => 
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350 
error ("Failed to get available systems at SystemOnTPTP:\n" ^ answer) 
31835  351 

35867  352 
fun refresh_systems_on_tptp () = 
353 
Synchronized.change systems (fn _ => get_systems ()); 

31835  354 

355 
fun get_system prefix = Synchronized.change_result systems (fn systems => 

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356 
(if null systems then get_systems () else systems) 
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357 
> `(find_first (String.isPrefix prefix))); 
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358 

32948  359 
fun the_system prefix = 
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360 
(case get_system prefix of 
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361 
NONE => error ("System " ^ quote prefix ^ 
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362 
" not available at SystemOnTPTP.") 
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363 
 SOME sys => sys); 
31835  364 

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365 
val remote_known_failures = 
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366 
[(TimedOut, "says Timeout"), 
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367 
(MalformedOutput, "Remotescript could not extract proof")] 
35865  368 

36059  369 
fun remote_prover_config prover_prefix args 
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370 
({proof_delims, known_failures, max_new_clauses, 
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371 
prefers_theory_relevant, ...} : prover_config) : prover_config = 
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372 
{home = getenv "ISABELLE_ATP_MANAGER", 
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373 
executable = "SystemOnTPTP", 
35969  374 
arguments = (fn timeout => 
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375 
args ^ " t " ^ string_of_int (generous_to_secs timeout) ^ " s " ^ 
35969  376 
the_system prover_prefix), 
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377 
proof_delims = insert (op =) tstp_proof_delims proof_delims, 
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378 
known_failures = remote_known_failures @ known_failures, 
35969  379 
max_new_clauses = max_new_clauses, 
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380 
prefers_theory_relevant = prefers_theory_relevant} 
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381 

35969  382 
val remote_vampire = 
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383 
tptp_prover (remotify (fst vampire)) 
36059  384 
(remote_prover_config "Vampire9" "" vampire_config) 
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385 

35969  386 
val remote_e = 
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387 
tptp_prover (remotify (fst e)) 
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388 
(remote_prover_config "EP" "" e_config) 
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389 

35969  390 
val remote_spass = 
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391 
tptp_prover (remotify (fst spass)) 
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392 
(remote_prover_config "SPASS" "x" spass_config) 
28592  393 

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394 
fun maybe_remote (name, _) ({home, ...} : prover_config) = 
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395 
name > home = "" ? remotify 
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396 

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397 
fun default_atps_param_value () = 
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398 
space_implode " " [maybe_remote e e_config, maybe_remote spass spass_config, 
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399 
remotify (fst vampire)] 
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400 

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401 
val provers = 
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402 
[spass, spass_tptp, vampire, e, remote_vampire, remote_spass, remote_e] 
35867  403 
val prover_setup = fold add_prover provers 
404 

405 
val setup = 

406 
destdir_setup 

407 
#> problem_prefix_setup 

408 
#> measure_runtime_setup 

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409 
#> prover_setup 
35867  410 

28592  411 
end; 