src/HOL/Tools/res_atp.ML
author paulson
Fri Oct 14 10:19:50 2005 +0200 (2005-10-14)
changeset 17845 1438291d57f0
parent 17819 1241e5d31d5b
child 17849 d7619ccf22e6
permissions -rw-r--r--
deletion of Tools/res_types_sorts; removal of absolute numbering of clauses
     1 (*  Author: Jia Meng, Cambridge University Computer Laboratory
     2     ID: $Id$
     3     Copyright 2004 University of Cambridge
     4 
     5 ATPs with TPTP format input.
     6 *)
     7 
     8 signature RES_ATP =
     9 sig
    10   val prover: string ref
    11   val custom_spass: string list ref
    12   val destdir: string ref
    13   val hook_count: int ref
    14   val problem_name: string ref
    15   val time_limit: int ref
    16 end;
    17 
    18 structure ResAtp: RES_ATP =
    19 struct
    20 
    21 val call_atp = ref false;
    22 val hook_count = ref 0;
    23 val time_limit = ref 60;
    24 
    25 val prover = ref "E";   (* use E as the default prover *)
    26 val custom_spass =   (*specialized options for SPASS*)
    27       ref ["-Auto=0","-FullRed=0","-IORe","-IOFc","-RTaut","-RFSub","-RBSub"];
    28 
    29 val destdir = ref "";   (*Empty means write files to /tmp*)
    30 val problem_name = ref "prob";
    31 
    32 (*Return the path to a "helper" like SPASS or tptp2X, first checking that
    33   it exists.  FIXME: modify to use Path primitives and move to some central place.*)  
    34 fun helper_path evar base =
    35   case getenv evar of
    36       "" => error  ("Isabelle environment variable " ^ evar ^ " not defined")
    37     | home => 
    38         let val path = home ^ "/" ^ base
    39         in  if File.exists (File.unpack_platform_path path) then path 
    40 	    else error ("Could not find the file " ^ path)
    41 	end;  
    42 
    43 fun probfile_nosuffix _ = 
    44   if !destdir = "" then File.platform_path (File.tmp_path (Path.basic (!problem_name)))
    45   else if File.exists (File.unpack_platform_path (!destdir))
    46   then !destdir ^ "/" ^ !problem_name
    47   else error ("No such directory: " ^ !destdir);
    48 
    49 fun prob_pathname n = probfile_nosuffix n ^ "_" ^ Int.toString n;
    50 
    51 
    52 (**** For running in Isar ****)
    53 
    54 (* same function as that in res_axioms.ML *)
    55 fun repeat_RS thm1 thm2 =
    56     let val thm1' =  thm1 RS thm2 handle THM _ => thm1
    57     in
    58         if eq_thm(thm1,thm1') then thm1' else (repeat_RS thm1' thm2)
    59     end;
    60 
    61 (* a special version of repeat_RS *)
    62 fun repeat_someI_ex th = repeat_RS th someI_ex;
    63 
    64 fun writeln_strs _   []      = ()
    65   | writeln_strs out (s::ss) = (TextIO.output (out, s); TextIO.output (out, "\n"); writeln_strs out ss);
    66 
    67 (* write out a subgoal as tptp clauses to the file "xxxx_N"*)
    68 fun tptp_inputs_tfrees thms pf n (axclauses,classrel_clauses,arity_clauses) =
    69   let
    70     val clss = ResClause.make_conjecture_clauses thms
    71     val (tptp_clss,tfree_litss) = ListPair.unzip (map ResClause.clause2tptp clss)
    72     val tfree_clss = map ResClause.tfree_clause (foldl (op union_string) [] tfree_litss)
    73     val classrel_cls = map ResClause.tptp_classrelClause classrel_clauses
    74     val arity_cls = map ResClause.tptp_arity_clause arity_clauses
    75     val out = TextIO.openOut(pf n)
    76   in
    77     writeln_strs out (List.concat (map ResClause.tptp_clause axclauses));
    78     writeln_strs out (tfree_clss @ tptp_clss @ classrel_cls @ arity_cls);
    79     TextIO.closeOut out
    80   end;
    81 
    82 (* write out a subgoal in DFG format to the file "xxxx_N"*)
    83 fun dfg_inputs_tfrees thms pf n (axclauses,classrel_clauses,arity_clauses) = 
    84     let val clss = ResClause.make_conjecture_clauses thms
    85         (*FIXME: classrel_clauses and arity_clauses*)
    86         val probN = ResClause.clauses2dfg clss (!problem_name ^ "_" ^ Int.toString n)
    87                         axclauses [] [] []    
    88 	val out = TextIO.openOut(pf n)
    89     in
    90 	writeln_strs out [probN]; TextIO.closeOut out
    91     end;
    92 
    93 
    94 (*********************************************************************)
    95 (* call prover with settings and problem file for the current subgoal *)
    96 (*********************************************************************)
    97 (* now passing in list of skolemized thms and list of sgterms to go with them *)
    98 fun watcher_call_provers sign sg_terms (childin, childout, pid) =
    99   let
   100     fun make_atp_list [] n = []
   101       | make_atp_list (sg_term::xs) n =
   102           let
   103             val probfile = prob_pathname n
   104             val time = Int.toString (!time_limit)
   105           in
   106             debug ("problem file in watcher_call_provers is " ^ probfile);
   107             (*Avoid command arguments containing spaces: Poly/ML and SML/NJ
   108               versions of Unix.execute treat them differently!*)
   109             (*options are separated by Watcher.setting_sep, currently #"%"*)
   110             if !prover = "spass"
   111             then
   112               let val optionline = 
   113 		      if !AtpCommunication.reconstruct 
   114 		          (*Proof reconstruction works for only a limited set of 
   115 		            inference rules*)
   116                       then space_implode "%" (!custom_spass) ^
   117                            "%-DocProof%-TimeLimit=" ^ time
   118                       else "-DocProof%-SOS%-FullRed=0%-TimeLimit=" ^ time (*Auto mode*)
   119                   val _ = debug ("SPASS option string is " ^ optionline)
   120                   val _ = helper_path "SPASS_HOME" "SPASS"
   121                     (*We've checked that SPASS is there for ATP/spassshell to run.*)
   122               in 
   123                   ([("spass", 
   124                      getenv "ISABELLE_HOME" ^ "/src/HOL/Tools/ATP/spassshell",
   125                      optionline, probfile)] @ 
   126                   (make_atp_list xs (n+1)))
   127               end
   128             else if !prover = "vampire"
   129 	    then 
   130               let val vampire = helper_path "VAMPIRE_HOME" "vampire"
   131               in
   132                 ([("vampire", vampire, "-m 100000%-t " ^ time, probfile)] @
   133                  (make_atp_list xs (n+1)))       (*BEWARE! spaces in options!*)
   134               end
   135       	     else if !prover = "E"
   136       	     then
   137 	       let val Eprover = helper_path "E_HOME" "eproof"
   138 	       in
   139 		  ([("E", Eprover, 
   140 		     "--tptp-in%-l5%-xAuto%-tAuto%--cpu-limit=" ^ time,
   141 		     probfile)] @
   142 		   (make_atp_list xs (n+1)))
   143 	       end
   144 	     else error ("Invalid prover name: " ^ !prover)
   145           end
   146 
   147     val atp_list = make_atp_list sg_terms 1
   148   in
   149     Watcher.callResProvers(childout,atp_list);
   150     debug "Sent commands to watcher!"
   151   end
   152 
   153 (*We write out problem files for each subgoal. Argument pf generates filenames,
   154   and allows the suppression of the suffix "_1" in problem-generation mode.*)
   155 fun write_problem_files pf (ctxt,th)  =
   156   let val prems = Thm.prems_of th
   157       val (clause_arr, axclauses) = ResClasimp.get_clasimp_lemmas ctxt (hd prems) 
   158               (*FIXME: hack!! need to consider relevance for all prems*)
   159       val _ = debug ("claset and simprules total clauses = " ^ 
   160                      Int.toString (Array.length clause_arr))
   161       val thy = ProofContext.theory_of ctxt
   162       val classrel_clauses = ResClause.classrel_clauses_thy thy
   163       val _ = debug ("classrel clauses = " ^ Int.toString (length classrel_clauses))
   164       val arity_clauses = ResClause.arity_clause_thy thy
   165       val _ = debug ("arity clauses = " ^ Int.toString (length arity_clauses))
   166       val write = if !prover = "spass" then dfg_inputs_tfrees else tptp_inputs_tfrees
   167       fun writenext n =
   168 	if n=0 then []
   169 	 else
   170 	   (SELECT_GOAL
   171 	    (EVERY1 [rtac ccontr, ObjectLogic.atomize_tac, skolemize_tac, 
   172 	      METAHYPS(fn negs => 
   173 		(write (make_clauses negs) pf n 
   174 		       (axclauses,classrel_clauses,arity_clauses);
   175 		 all_tac))]) n th;
   176 	    pf n :: writenext (n-1))
   177       in (writenext (length prems), clause_arr) end;
   178 
   179 val last_watcher_pid = ref (NONE : (TextIO.instream * TextIO.outstream * 
   180                                     Posix.Process.pid * string list) option);
   181 
   182 fun kill_last_watcher () =
   183     (case !last_watcher_pid of 
   184          NONE => ()
   185        | SOME (_, childout, pid, files) => 
   186 	  (debug ("Killing old watcher, pid = " ^ string_of_pid pid);
   187 	   Watcher.killWatcher pid;  
   188 	   ignore (map (try OS.FileSys.remove) files)))
   189      handle OS.SysErr _ => debug "Attempt to kill watcher failed";
   190 
   191 (*writes out the current clasimpset to a tptp file;
   192   turns off xsymbol at start of function, restoring it at end    *)
   193 val isar_atp = setmp print_mode [] 
   194  (fn (ctxt, th) =>
   195   if Thm.no_prems th then ()
   196   else
   197     let
   198       val _ = kill_last_watcher()
   199       val (files,clause_arr) = write_problem_files prob_pathname (ctxt,th)
   200       val (childin, childout, pid) = Watcher.createWatcher (th, clause_arr)
   201     in
   202       last_watcher_pid := SOME (childin, childout, pid, files);
   203       debug ("problem files: " ^ space_implode ", " files); 
   204       debug ("pid: " ^ string_of_pid pid);
   205       watcher_call_provers (sign_of_thm th) (Thm.prems_of th) (childin, childout, pid)
   206     end);
   207 
   208 val isar_atp_writeonly = setmp print_mode [] 
   209       (fn (ctxt,th) =>
   210        if Thm.no_prems th then ()
   211        else 
   212          let val pf = if Thm.nprems_of th = 1 then probfile_nosuffix 
   213          	      else prob_pathname
   214          in ignore (write_problem_files pf (ctxt,th)) end);
   215 
   216 
   217 (** the Isar toplevel hook **)
   218 
   219 val invoke_atp = Toplevel.unknown_proof o Toplevel.keep (fn state =>
   220   let
   221     val proof = Toplevel.proof_of state
   222     val (ctxt, (_, goal)) = Proof.get_goal proof
   223         handle Proof.STATE _ => error "No goal present";
   224     val thy = ProofContext.theory_of ctxt;
   225   in
   226     debug ("subgoals in isar_atp:\n" ^ 
   227            Pretty.string_of (ProofContext.pretty_term ctxt
   228              (Logic.mk_conjunction_list (Thm.prems_of goal))));
   229     debug ("number of subgoals in isar_atp: " ^ Int.toString (Thm.nprems_of goal));
   230     debug ("current theory: " ^ Context.theory_name thy);
   231     hook_count := !hook_count +1;
   232     debug ("in hook for time: " ^ Int.toString (!hook_count));
   233     ResClause.init thy;
   234     if !destdir = "" andalso !time_limit > 0 then isar_atp (ctxt, goal)
   235     else isar_atp_writeonly (ctxt, goal)
   236   end);
   237 
   238 val call_atpP =
   239   OuterSyntax.command 
   240     "ProofGeneral.call_atp" 
   241     "call automatic theorem provers" 
   242     OuterKeyword.diag
   243     (Scan.succeed (Toplevel.no_timing o invoke_atp));
   244 
   245 val _ = OuterSyntax.add_parsers [call_atpP];
   246 
   247 end;