author  blanchet 
Tue, 22 Jun 2010 23:54:02 +0200  
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parent 37506  32a1ee39c49b 
child 37514  b147d01b8ebc 
permissions  rwrr 
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(* Title: HOL/Tools/ATP_Manager/atp_systems.ML 
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Author: Fabian Immler, TU Muenchen 
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Author: Jasmin Blanchette, TU Muenchen 
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Setup for supported ATPs. 
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*) 
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signature ATP_SYSTEMS = 
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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 dest_dir : 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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structure ATP_Systems : ATP_SYSTEMS = 
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struct 
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open Sledgehammer_Util 
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open Sledgehammer_Fact_Preprocessor 
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open Sledgehammer_HOL_Clause 
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open Sledgehammer_Fact_Filter 

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open Sledgehammer_Proof_Reconstruct 

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open Sledgehammer_TPTP_Format 
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open ATP_Manager 
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(** generic ATP **) 
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(* external problem files *) 
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val (dest_dir, dest_dir_setup) = Attrib.config_string "atp_dest_dir" (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_var: 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_axiom_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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> first_field "\n" > the > snd 

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handle Option.Option => "") 

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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 IncompleteUnprovable = 
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"The ATP cannot prove the problem." 

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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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(* FIXME: Change the error message below to point to the Isabelle download 
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page once the package is there (around the Isabelle2010 release). *) 
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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 MalformedInput = 
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"Internal Sledgehammer error: The ATP problem is malformed. Please report \ 

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\this to the Isabelle developers." 

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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 shape_of_clauses _ [] = [] 
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 shape_of_clauses j ([] :: clauses) = [] :: shape_of_clauses j clauses 
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 shape_of_clauses j ((_ :: lits) :: clauses) = 
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let val shape = shape_of_clauses (j + 1) (lits :: clauses) in 
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(j :: hd shape) :: tl shape 
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end 
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(* generic TPTPbased provers *) 
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fun generic_tptp_prover 
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(name, {home_var, executable, arguments, proof_delims, known_failures, 
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max_axiom_clauses, prefers_theory_relevant}) 
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({debug, overlord, full_types, explicit_apply, respect_no_atp, 
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relevance_threshold, relevance_convergence, theory_relevant, 
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defs_relevant, isar_proof, isar_shrink_factor, ...} : params) 
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minimize_command timeout 
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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, (_, th)) = goal; 
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val thy = ProofContext.theory_of ctxt; 
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val goal_clss = #1 (neg_conjecture_clauses ctxt th subgoal) 
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val goal_cls = List.concat goal_clss 
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val the_filtered_clauses = 
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(case filtered_clauses of 
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NONE => relevant_facts full_types respect_no_atp relevance_threshold 
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relevance_convergence defs_relevant max_axiom_clauses 
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(the_default prefers_theory_relevant theory_relevant) 
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relevance_override goal goal_cls 
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 SOME fcls => fcls); 
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val the_axiom_clauses = axiom_clauses > the_default the_filtered_clauses 
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val (internal_thm_names, clauses) = 
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prepare_clauses full_types goal_cls the_axiom_clauses the_filtered_clauses 
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thy 
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(* path to unique problem file *) 
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val the_dest_dir = if overlord then getenv "ISABELLE_HOME_USER" 
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else Config.get ctxt dest_dir; 

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val the_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 ((if overlord then "prob_" ^ name 
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else the_problem_prefix ^ serial_string ()) 
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^ "_" ^ string_of_int nr) 
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in 
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if the_dest_dir = "" then File.tmp_path probfile 
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else if File.exists (Path.explode the_dest_dir) 

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then Path.append (Path.explode the_dest_dir) probfile 

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else error ("No such directory: " ^ the_dest_dir ^ ".") 

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end; 
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val home = getenv home_var 
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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, arguments timeout, 
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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, arguments timeout, 
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File.shell_path probfile, "2>&1"]) ^ 
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(if overlord then 
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"  sed 's/,/, /g' \ 
36485  178 
\ sed 's/\\([^!=<]\\)\\([=]\\)\\([^=>]\\)/\\1 \\2 \\3/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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182 
else 
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183 
"") 
32510  184 
fun split_time s = 
185 
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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val split_time' = 
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if Config.get ctxt measure_runtime then split_time else rpair 0 
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fun run_on probfile = 
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198 
if File.exists command then 
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199 
write_tptp_file (debug andalso overlord) full_types explicit_apply 
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probfile clauses 
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> pair (apfst split_time' (bash_output (command_line probfile))) 
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202 
else if home = "" then 
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203 
error ("The environment variable " ^ quote home_var ^ " is not set.") 
36382  204 
else 
205 
error ("Bad executable: " ^ Path.implode command ^ "."); 

28592  206 

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(* If the problem file has not been exported, remove it; otherwise, export 
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the proof file too. *) 
36376  209 
fun cleanup probfile = 
210 
if the_dest_dir = "" then try File.rm probfile else NONE 

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fun export probfile (((output, _), _), _) = 
36376  212 
if the_dest_dir = "" then 
36187  213 
() 
214 
else 

215 
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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219 
else 
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220 
"") ^ output) 
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221 

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val (((output, atp_run_time_in_msecs), res_code), 
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223 
(pool, conjecture_offset)) = 
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with_path cleanup export run_on (prob_pathname subgoal); 
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val conjecture_shape = shape_of_clauses (conjecture_offset + 1) goal_clss 
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226 
(* Check for success and print out some information on failure. *) 
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227 
val (proof, outcome) = 
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228 
extract_proof_and_outcome res_code proof_delims known_failures output 
35969  229 
val (message, relevant_thm_names) = 
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230 
case outcome of 
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231 
NONE => 
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232 
proof_text isar_proof 
37480  233 
(pool, debug, isar_shrink_factor, ctxt, conjecture_shape) 
234 
(full_types, minimize_command, proof, internal_thm_names, th, 

235 
subgoal) 

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236 
 SOME failure => (string_for_failure failure ^ "\n", []) 
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237 
in 
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238 
{outcome = outcome, message = message, pool = pool, 
35969  239 
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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241 
proof = proof, internal_thm_names = internal_thm_names, 
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242 
conjecture_shape = conjecture_shape, 
35969  243 
filtered_clauses = the_filtered_clauses} 
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244 
end 
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35969  246 
fun tptp_prover name p = (name, generic_tptp_prover (name, p)); 
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247 

36382  248 
fun to_generous_secs time = (Time.toMilliseconds time + 999) div 1000 
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249 

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(* E prover *) 
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251 

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252 
val tstp_proof_delims = 
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253 
("# SZS output start CNFRefutation.", "# SZS output end CNFRefutation") 
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254 

35969  255 
val e_config : prover_config = 
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256 
{home_var = "E_HOME", 
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257 
executable = "eproof", 
36382  258 
arguments = fn timeout => 
259 
"tstpin tstpout l5 xAutoDev tAutoDev silent cpulimit=" ^ 

260 
string_of_int (to_generous_secs timeout), 

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261 
proof_delims = [tstp_proof_delims], 
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262 
known_failures = 
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263 
[(Unprovable, "SZS status: Satisfiable"), 
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264 
(Unprovable, "SZS status Satisfiable"), 
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265 
(TimedOut, "Failure: Resource limit exceeded (time)"), 
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266 
(TimedOut, "time limit exceeded"), 
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267 
(OutOfResources, 
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268 
"# Cannot determine problem status within resource limit"), 
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269 
(OutOfResources, "SZS status: ResourceOut"), 
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270 
(OutOfResources, "SZS status ResourceOut")], 
36382  271 
max_axiom_clauses = 100, 
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272 
prefers_theory_relevant = false} 
35969  273 
val e = tptp_prover "e" e_config 
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274 

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275 

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276 
(* The "VarWeight=3" option helps the higherorder problems, probably by 
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277 
counteracting the presence of "hAPP". *) 
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278 
val spass_config : prover_config = 
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279 
{home_var = "SPASS_HOME", 
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280 
executable = "SPASS", 
36382  281 
arguments = fn timeout => 
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282 
"TPTP Auto SOS=1 PGiven=0 PProblem=0 Splits=0 FullRed=0 DocProof \ 
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283 
\VarWeight=3 TimeLimit=" ^ string_of_int (to_generous_secs timeout), 
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284 
proof_delims = [("Here is a proof", "Formulae used in the proof")], 
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285 
known_failures = 
37413  286 
[(IncompleteUnprovable, "SPASS beiseite: Completion found"), 
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287 
(TimedOut, "SPASS beiseite: Ran out of time"), 
36965  288 
(OutOfResources, "SPASS beiseite: Maximal number of loops exceeded"), 
37413  289 
(MalformedInput, "Undefined symbol"), 
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290 
(MalformedInput, "Free Variable"), 
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291 
(OldSpass, "unrecognized option `TPTP'"), 
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292 
(OldSpass, "Unrecognized option TPTP")], 
36382  293 
max_axiom_clauses = 40, 
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294 
prefers_theory_relevant = true} 
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295 
val spass = tptp_prover "spass" spass_config 
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296 

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297 
(* Vampire *) 
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298 

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299 
val vampire_config : prover_config = 
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300 
{home_var = "VAMPIRE_HOME", 
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301 
executable = "vampire", 
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302 
arguments = fn timeout => 
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303 
"output_syntax tptp mode casc t " ^ 
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304 
string_of_int (to_generous_secs timeout), 
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305 
proof_delims = 
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306 
[("=========== Refutation ==========", 
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307 
"======= End of refutation ======="), 
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308 
("% SZS output start Refutation", "% SZS output end Refutation")], 
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309 
known_failures = 
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310 
[(Unprovable, "UNPROVABLE"), 
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311 
(IncompleteUnprovable, "CANNOT PROVE"), 
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312 
(Unprovable, "Satisfiability detected"), 
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(OutOfResources, "Refutation not found")], 
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max_axiom_clauses = 60, 
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prefers_theory_relevant = false} 
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val vampire = tptp_prover "vampire" vampire_config 
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317 

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(* Remote prover invocation via SystemOnTPTP *) 
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val systems = Synchronized.var "atp_systems" ([]: string list); 
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fun get_systems () = 

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case bash_output "\"$ISABELLE_ATP_MANAGER/SystemOnTPTP\" w" of 
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(answer, 0) => split_lines answer 
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325 
 (answer, _) => 
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error ("Failed to get available systems at SystemOnTPTP:\n" ^ answer) 
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fun refresh_systems_on_tptp () = 
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329 
Synchronized.change systems (fn _ => get_systems ()) 
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331 
fun get_system prefix = Synchronized.change_result systems (fn systems => 

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(if null systems then get_systems () else systems) 
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333 
> `(find_first (String.isPrefix prefix))); 
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334 

32948  335 
fun the_system prefix = 
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(case get_system prefix of 
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NONE => error ("System " ^ quote prefix ^ " not available at SystemOnTPTP.") 
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338 
 SOME sys => sys); 
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340 
val remote_known_failures = 
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341 
[(TimedOut, "says Timeout"), 
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342 
(MalformedOutput, "Remote script could not extract proof")] 
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344 
fun remote_config atp_prefix args 
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({proof_delims, known_failures, max_axiom_clauses, 
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prefers_theory_relevant, ...} : prover_config) : prover_config = 
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{home_var = "ISABELLE_ATP_MANAGER", 
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executable = "SystemOnTPTP", 
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arguments = fn timeout => 
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args ^ " t " ^ string_of_int (to_generous_secs timeout) ^ " s " ^ 

351 
the_system atp_prefix, 

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proof_delims = insert (op =) tstp_proof_delims proof_delims, 
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known_failures = remote_known_failures @ known_failures, 
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max_axiom_clauses = max_axiom_clauses, 
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355 
prefers_theory_relevant = prefers_theory_relevant} 
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356 

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fun remote_tptp_prover prover atp_prefix args config = 
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358 
tptp_prover (remotify (fst prover)) (remote_config atp_prefix args config) 
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359 

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val remote_e = remote_tptp_prover e "EP" "" e_config 
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val remote_spass = remote_tptp_prover spass "SPASS" "x" spass_config 
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val remote_vampire = remote_tptp_prover vampire "Vampire9" "" vampire_config 
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fun maybe_remote (name, _) ({home_var, ...} : prover_config) = 
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365 
name > getenv home_var = "" ? remotify 
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366 

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367 
fun default_atps_param_value () = 
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368 
space_implode " " [maybe_remote e e_config, maybe_remote spass spass_config, 
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369 
remotify (fst vampire)] 
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370 

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371 
val provers = [e, spass, vampire, remote_e, remote_spass, remote_vampire] 
35867  372 
val prover_setup = fold add_prover provers 
373 

374 
val setup = 

36376  375 
dest_dir_setup 
35867  376 
#> problem_prefix_setup 
377 
#> measure_runtime_setup 

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#> prover_setup 
35867  379 

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end; 