(* Author: Jia Meng, Cambridge University Computer Laboratory
ID: $Id$
Copyright 2004 University of Cambridge
ATPs with TPTP format input.
*)
signature RES_ATP =
sig
val prover: string ref
val custom_spass: string list ref
val destdir: string ref
val hook_count: int ref
val problem_name: string ref
end;
structure ResAtp: RES_ATP =
struct
val call_atp = ref false;
val hook_count = ref 0;
val prover = ref "E"; (* use E as the default prover *)
val custom_spass = (*specialized options for SPASS*)
ref ["Auto=0","-FullRed=0","-IORe","-IOFc","-RTaut","-RFSub","-RBSub",
"-DocProof","-TimeLimit=60"];
val destdir = ref ""; (*Empty means write files to /tmp*)
val problem_name = ref "prob";
fun prob_pathname() =
if !destdir = "" then File.platform_path (File.tmp_path (Path.basic (!problem_name)))
else if File.exists (File.unpack_platform_path (!destdir))
then !destdir ^ "/" ^ !problem_name
else error ("No such directory: " ^ !destdir);
(**** for Isabelle/ML interface ****)
(*Remove unwanted characters such as ? and newline from the textural
representation of a theorem (surely they don't need to be produced in
the first place?) *)
fun is_proof_char ch = (#" " <= ch andalso ch <= #"~" andalso ch <> #"?");
val proofstring =
String.translate (fn c => if is_proof_char c then str c else "");
(**** For running in Isar ****)
(* same function as that in res_axioms.ML *)
fun repeat_RS thm1 thm2 =
let val thm1' = thm1 RS thm2 handle THM _ => thm1
in
if eq_thm(thm1,thm1') then thm1' else (repeat_RS thm1' thm2)
end;
(* a special version of repeat_RS *)
fun repeat_someI_ex thm = repeat_RS thm someI_ex;
(*********************************************************************)
(* write out a subgoal as tptp clauses to the file "probN" *)
(* where N is the number of this subgoal *)
(*********************************************************************)
fun tptp_inputs_tfrees thms n axclauses =
let
val _ = debug ("in tptp_inputs_tfrees 0")
val clss = map (ResClause.make_conjecture_clause_thm) thms
val _ = debug ("in tptp_inputs_tfrees 1")
val (tptp_clss,tfree_litss) = ListPair.unzip (map ResClause.clause2tptp clss)
val _ = debug ("in tptp_inputs_tfrees 2")
val tfree_clss = map ResClause.tfree_clause (ResLib.flat_noDup tfree_litss)
val _ = debug ("in tptp_inputs_tfrees 3")
val probfile = prob_pathname() ^ "_" ^ string_of_int n
val out = TextIO.openOut(probfile)
in
ResLib.writeln_strs out (List.concat (map ResClause.tptp_clause axclauses));
ResLib.writeln_strs out (tfree_clss @ tptp_clss);
TextIO.closeOut out;
debug probfile
end;
(*********************************************************************)
(* write out a subgoal as DFG clauses to the file "probN" *)
(* where N is the number of this subgoal *)
(*********************************************************************)
fun dfg_inputs_tfrees thms n axclauses =
let val clss = map (ResClause.make_conjecture_clause_thm) thms
val probfile = prob_pathname() ^ "_" ^ (string_of_int n)
val _ = debug ("about to write out dfg prob file " ^ probfile)
val probN = ResClause.clauses2dfg clss ("prob" ^ (string_of_int n))
axclauses [] [] []
val out = TextIO.openOut(probfile)
in
(ResLib.writeln_strs out [probN]; TextIO.closeOut out; debug probfile )
(* (ResLib.writeln_strs out (tfree_clss @ dfg_clss); *)
end;
(*********************************************************************)
(* call prover with settings and problem file for the current subgoal *)
(*********************************************************************)
(* now passing in list of skolemized thms and list of sgterms to go with them *)
fun watcher_call_provers sign sg_terms (childin, childout,pid) =
let
fun make_atp_list [] n = []
| make_atp_list ((sg_term)::xs) n =
let
val goalstring = proofstring (Sign.string_of_term sign sg_term)
val _ = debug ("goalstring in make_atp_lists is " ^ goalstring)
val probfile = prob_pathname() ^ "_" ^ string_of_int n
val _ = debug ("prob file in watcher_call_provers is " ^ probfile)
in
(*Avoid command arguments containing spaces: Poly/ML and SML/NJ
versions of Unix.execute treat them differently!*)
if !prover = "spass"
then
let val optionline =
if !AtpCommunication.reconstruct
(*Proof reconstruction works for only a limited set of
inference rules*)
then "-" ^ space_implode "%-" (!custom_spass)
else "-DocProof%-TimeLimit=60%-SOS%-FullRed=0" (*Auto mode*)
val _ = debug ("SPASS option string is " ^ optionline)
val _ = ResLib.helper_path "SPASS_HOME" "SPASS"
(*We've checked that SPASS is there for ATP/spassshell to run.*)
in
([("spass", goalstring,
getenv "ISABELLE_HOME" ^ "/src/HOL/Tools/ATP/spassshell",
optionline, probfile)] @
(make_atp_list xs (n+1)))
end
else if !prover = "vampire"
then
let val vampire = ResLib.helper_path "VAMPIRE_HOME" "vampire"
in
([("vampire", goalstring, vampire, "-t 60%-m 100000", probfile)] @
(make_atp_list xs (n+1))) (*BEWARE! spaces in options!*)
end
else if !prover = "E"
then
let val Eprover = ResLib.helper_path "E_HOME" "eproof"
in
([("E", goalstring, Eprover,
"--tptp-in%-l5%-xAuto%-tAuto%--soft-cpu-limit=60",
probfile)] @
(make_atp_list xs (n+1)))
end
else error ("Invalid prover name: " ^ !prover)
end
val atp_list = make_atp_list sg_terms 1
in
Watcher.callResProvers(childout,atp_list);
debug "Sent commands to watcher!"
end
(*We write out problem files for each subgoal, but work is repeated (skolemize)*)
fun write_problem_files axclauses thm n =
if n=0 then ()
else
(SELECT_GOAL
(EVERY1 [rtac ccontr, ResLib.atomize_tac, skolemize_tac,
METAHYPS(fn negs =>
(if !prover = "spass"
then dfg_inputs_tfrees (make_clauses negs) n axclauses
else tptp_inputs_tfrees (make_clauses negs) n axclauses;
write_problem_files axclauses thm (n-1);
all_tac))]) n thm;
());
(*FIXME: WHAT IS THMS FOR????*)
(******************************************************************)
(* called in Isar automatically *)
(* writes out the current clasimpset to a tptp file *)
(* turns off xsymbol at start of function, restoring it at end *)
(******************************************************************)
(*FIX changed to clasimp_file *)
val isar_atp = setmp print_mode []
(fn (ctxt, thms, thm) =>
if Thm.no_prems thm then ()
else
let
val _= debug ("in isar_atp")
val thy = ProofContext.theory_of ctxt
val prems = Thm.prems_of thm
val thms_string = Meson.concat_with_and (map string_of_thm thms)
val prems_string = Meson.concat_with_and (map (Sign.string_of_term thy) prems)
(*set up variables for writing out the clasimps to a tptp file*)
val (clause_arr, axclauses) = ResClasimp.get_clasimp_lemmas ctxt (hd prems)
(*FIXME: hack!! need to consider relevance for all prems*)
val _ = debug ("claset and simprules total clauses = " ^
string_of_int (Array.length clause_arr))
val (childin, childout, pid) = Watcher.createWatcher (thm, clause_arr)
in
debug ("initial thms: " ^ thms_string);
debug ("subgoals: " ^ prems_string);
debug ("pid: " ^ Int.toString (ResLib.intOfPid pid));
write_problem_files axclauses thm (length prems);
watcher_call_provers (sign_of_thm thm) (Thm.prems_of thm) (childin, childout, pid)
end);
val isar_atp_writeonly = setmp print_mode []
(fn (ctxt, thms: thm list, thm) =>
if Thm.no_prems thm then ()
else
let val prems = Thm.prems_of thm
val (_, axclauses) = ResClasimp.get_clasimp_lemmas ctxt (hd prems)
in
write_problem_files axclauses thm (length prems)
end);
(* convert locally declared rules to axiom clauses: UNUSED *)
fun subtract_simpset thy ctxt =
let
val rules1 = #rules (#1 (rep_ss (simpset_of thy)));
val rules2 = #rules (#1 (rep_ss (local_simpset_of ctxt)));
in map #thm (Net.subtract MetaSimplifier.eq_rrule rules1 rules2) end;
fun subtract_claset thy ctxt =
let
val (netI1, netE1) = #xtra_netpair (rep_cs (claset_of thy));
val (netI2, netE2) = #xtra_netpair (rep_cs (local_claset_of ctxt));
val subtract = map (#2 o #2) oo Net.subtract Tactic.eq_kbrl;
in subtract netI1 netI2 @ subtract netE1 netE2 end;
(** the Isar toplevel hook **)
val invoke_atp = Toplevel.unknown_proof o Toplevel.keep (fn state =>
let
val proof = Toplevel.proof_of state
val (ctxt, (_, goal)) = Proof.get_goal proof
handle Proof.STATE _ => error "No goal present";
val thy = ProofContext.theory_of ctxt;
in
debug ("initial thm in isar_atp: " ^
Pretty.string_of (ProofContext.pretty_thm ctxt goal));
debug ("subgoals in isar_atp: " ^
Pretty.string_of (ProofContext.pretty_term ctxt
(Logic.mk_conjunction_list (Thm.prems_of goal))));
debug ("number of subgoals in isar_atp: " ^ string_of_int (Thm.nprems_of goal));
debug ("current theory: " ^ Context.theory_name thy);
hook_count := !hook_count +1;
debug ("in hook for time: " ^(string_of_int (!hook_count)) );
ResClause.init thy;
if !destdir = "" then isar_atp (ctxt, ProofContext.prems_of ctxt, goal)
else isar_atp_writeonly (ctxt, ProofContext.prems_of ctxt, goal)
end);
val call_atpP =
OuterSyntax.improper_command
"ProofGeneral.call_atp"
"call automatic theorem provers"
OuterKeyword.diag
(Scan.succeed (Toplevel.no_timing o invoke_atp));
val _ = OuterSyntax.add_parsers [call_atpP];
end;