author  paulson 
Wed, 07 Sep 2005 18:14:26 +0200  
changeset 17306  5cde710a8a23 
parent 17305  6cef3aedd661 
child 17317  3f12de2e2e6e 
permissions  rwrr 
15608  1 
(* Author: Jia Meng, Cambridge University Computer Laboratory 
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ID: $Id$ 

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Copyright 2004 University of Cambridge 

15347  4 

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ATPs with TPTP format input. 

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*) 

15452  7 

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signature RES_ATP = 
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sig 
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val axiom_file : Path.T 
17306  11 
val prover: string ref 
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val custom_spass: string list ref 
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val hook_count: int ref 
15347  14 
end; 
15 

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structure ResAtp: RES_ATP = 
15347  17 
struct 
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val call_atp = ref false; 
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val hook_count = ref 0; 
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16904  23 
fun debug_tac tac = (debug "testing"; tac); 
16478  24 

17306  25 
val prover = ref "spass"; (* use spass as default prover *) 
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val custom_spass = (*specialized options for SPASS*) 
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ref ["Auto=0","IORe","IOFc","RTaut","RFSub","RBSub", 
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"DocProof","TimeLimit=60"]; 
15347  29 

15644  30 
val axiom_file = File.tmp_path (Path.basic "axioms"); 
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val hyps_file = File.tmp_path (Path.basic "hyps"); 

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val prob_file = File.tmp_path (Path.basic "prob"); 

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15347  35 
(**** for Isabelle/ML interface ****) 
36 

16897  37 
(*Remove unwanted characters such as ? and newline from the textural 
38 
representation of a theorem (surely they don't need to be produced in 

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the first place?) *) 

15608  40 

16897  41 
fun is_proof_char ch = (#" " <= ch andalso ch <= #"~" andalso ch <> #"?"); 
42 

43 
val proofstring = 

44 
String.translate (fn c => if is_proof_char c then str c else ""); 

15608  45 

15452  46 

15347  47 
(**** For running in Isar ****) 
48 

15608  49 
(* same function as that in res_axioms.ML *) 
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fun repeat_RS thm1 thm2 = 

51 
let val thm1' = thm1 RS thm2 handle THM _ => thm1 

52 
in 

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if eq_thm(thm1,thm1') then thm1' else (repeat_RS thm1' thm2) 
15608  54 
end; 
55 

56 
(* a special version of repeat_RS *) 

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fun repeat_someI_ex thm = repeat_RS thm someI_ex; 

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15644  60 
(*********************************************************************) 
15608  61 
(* convert clauses from "assume" to conjecture. write to file "hyps" *) 
15644  62 
(* hypotheses of the goal currently being proved *) 
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(*********************************************************************) 

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(*perhaps have 2 different versions of this, depending on whether or not spass is set *) 
15608  65 
fun isar_atp_h thms = 
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let val prems = map (skolemize o make_nnf o ObjectLogic.atomize_thm) thms 

15644  67 
val prems' = map repeat_someI_ex prems 
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val prems'' = make_clauses prems' 

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val prems''' = ResAxioms.rm_Eps [] prems'' 

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val clss = map ResClause.make_conjecture_clause prems''' 

15774  71 
val (tptp_clss,tfree_litss) = ListPair.unzip (map ResClause.clause2tptp clss) 
15608  72 
val tfree_lits = ResLib.flat_noDup tfree_litss 
16767  73 
(* tfree clause is different in tptp and dfg versions *) 
15608  74 
val tfree_clss = map ResClause.tfree_clause tfree_lits 
16259  75 
val hypsfile = File.platform_path hyps_file 
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val out = TextIO.openOut(hypsfile) 
15608  77 
in 
16904  78 
ResLib.writeln_strs out (tfree_clss @ tptp_clss); 
79 
TextIO.closeOut out; debug hypsfile; 

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tfree_lits 

15608  81 
end; 
15347  82 

15644  83 

84 
(*********************************************************************) 

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(* write out a subgoal as tptp clauses to the file "probN" *) 

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(* where N is the number of this subgoal *) 

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(*********************************************************************) 

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fun tptp_inputs_tfrees thms n tfrees axclauses = 
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let 
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val _ = debug ("in tptp_inputs_tfrees 0") 
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val clss = map (ResClause.make_conjecture_clause_thm) thms 
16904  93 
val _ = debug ("in tptp_inputs_tfrees 1") 
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val (tptp_clss,tfree_litss) = ListPair.unzip (map ResClause.clause2tptp clss) 
16904  95 
val _ = debug ("in tptp_inputs_tfrees 2") 
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val tfree_clss = map ResClause.tfree_clause ((ResLib.flat_noDup tfree_litss) \\ tfrees) 
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val _ = debug ("in tptp_inputs_tfrees 3") 
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val probfile = File.platform_path prob_file ^ "_" ^ string_of_int n 
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val out = TextIO.openOut(probfile) 
15608  100 
in 
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ResLib.writeln_strs out (List.concat (map ResClause.tptp_clause axclauses)); 
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ResLib.writeln_strs out (tfree_clss @ tptp_clss); 
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TextIO.closeOut out; 
16904  104 
debug probfile 
15608  105 
end; 
15452  106 

15608  107 

16767  108 
(*********************************************************************) 
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(* write out a subgoal as DFG clauses to the file "probN" *) 

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(* where N is the number of this subgoal *) 

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(*********************************************************************) 

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fun dfg_inputs_tfrees thms n tfrees axclauses = 
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let val clss = map (ResClause.make_conjecture_clause_thm) thms 
16767  115 
val probfile = (File.platform_path prob_file) ^ "_" ^ (string_of_int n) 
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val _ = debug ("about to write out dfg prob file " ^ probfile) 
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(*val (dfg_clss,tfree_litss) = ListPair.unzip (map ResClause.clause2dfg clss) 
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val tfree_clss = map ResClause.tfree_dfg_clause ((ResLib.flat_noDup tfree_litss) \\ tfrees) *) 
17234  119 
val probN = ResClause.clauses2dfg clss ("prob" ^ (string_of_int n)) 
17231  120 
axclauses [] [] [] tfrees 
16767  121 
val out = TextIO.openOut(probfile) 
122 
in 

17234  123 
(ResLib.writeln_strs out [probN]; TextIO.closeOut out; debug probfile ) 
17231  124 
(* (ResLib.writeln_strs out (tfree_clss @ dfg_clss); *) 
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end; 
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16357  127 

15644  128 
(*********************************************************************) 
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(* call prover with settings and problem file for the current subgoal *) 
15644  130 
(*********************************************************************) 
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(* now passing in list of skolemized thms and list of sgterms to go with them *) 
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fun call_resolve_tac (thms: thm list list) sign (sg_terms: term list) (childin, childout,pid) n = 
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let 
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val axfile = (File.platform_path axiom_file) 
16520  135 

136 
val hypsfile = (File.platform_path hyps_file) 

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fun make_atp_list [] sign n = [] 
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 make_atp_list ((sko_thm, sg_term)::xs) sign n = 
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let 
16897  141 
val thmstr = proofstring (Meson.concat_with_and (map string_of_thm sko_thm)) 
16904  142 
val _ = debug ("thmstring in make_atp_lists is " ^ thmstr) 
15608  143 

16897  144 
val goalstring = proofstring (Sign.string_of_term sign sg_term) 
16904  145 
val _ = debug ("goalstring in make_atp_lists is " ^ goalstring) 
16357  146 

16897  147 
val probfile = File.platform_path prob_file ^ "_" ^ (string_of_int n) 
16904  148 
val _ = debug ("prob file in call_resolve_tac is " ^ probfile) 
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in 
17306  150 
if !prover = "spass" 
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then 
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let val optionline = 
153 
if !SpassComm.reconstruct 

154 
(*Proof reconstruction works for only a limited set of 

155 
inference rules*) 

156 
then "" ^ space_implode "%" (!custom_spass) 

157 
else "DocProof%TimeLimit=60%SOS" (*Auto mode*) 

16904  158 
val _ = debug ("SPASS option string is " ^ optionline) 
16897  159 
val _ = ResLib.helper_path "SPASS_HOME" "SPASS" 
160 
(*We've checked that SPASS is there for ATP/spassshell to run.*) 

161 
in 

162 
([("spass", thmstr, goalstring, 

163 
getenv "ISABELLE_HOME" ^ "/src/HOL/Tools/ATP/spassshell", 

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optionline, axfile, hypsfile, probfile)] @ 
16897  165 
(make_atp_list xs sign (n+1))) 
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end 
17306  167 
else if !prover = "vampire" 
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then 
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let val vampire = ResLib.helper_path "VAMPIRE_HOME" "vkernel" 
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in 
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([("vampire", thmstr, goalstring, vampire, "t 60%m 100000", 
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axfile, hypsfile, probfile)] @ 
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(make_atp_list xs sign (n+1))) 
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end 
17306  175 
else if !prover = "E" 
176 
then 

177 
let val Eprover = ResLib.helper_path "E_HOME" "eproof" 

178 
in 

179 
([("E", thmstr, goalstring, Eprover, 

180 
"tptpin%l5%xAuto%tAuto%softcpulimit=60", 

181 
axfile, hypsfile, probfile)] @ 

182 
(make_atp_list xs sign (n+1))) 

183 
end 

184 
else error ("Invalid prover name: " ^ !prover) 

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end 
15452  186 

16897  187 
val atp_list = make_atp_list (ListPair.zip (thms, sg_terms)) sign 1 
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in 
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Watcher.callResProvers(childout,atp_list); 
16904  190 
debug "Sent commands to watcher!"; 
17234  191 
all_tac 
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end 
16357  193 

15644  194 
(**********************************************************) 
195 
(* write out the current subgoal as a tptp file, probN, *) 

17234  196 
(* then call all_tac  should be call_res_tac *) 
15644  197 
(**********************************************************) 
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fun get_sko_thms tfrees sign sg_terms (childin, childout,pid) thm n sko_thms axclauses = 
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if n=0 then 
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(call_resolve_tac (rev sko_thms) 
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sign sg_terms (childin, childout, pid) (List.length sg_terms); 
17234  204 
all_tac thm) 
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else 
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17306  207 
(SELECT_GOAL 
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(EVERY1 [rtac ccontr, ResLib.atomize_tac, skolemize_tac, 
17231  209 
METAHYPS(fn negs => 
17306  210 
(if !prover = "spass" 
17231  211 
then dfg_inputs_tfrees (make_clauses negs) n tfrees axclauses 
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else tptp_inputs_tfrees (make_clauses negs) n tfrees axclauses; 
17231  213 
get_sko_thms tfrees sign sg_terms (childin, childout, pid) 
17306  214 
thm (n1) (negs::sko_thms) axclauses; 
215 
all_tac))]) n thm) 

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15644  217 

218 

219 
(**********************************************) 

220 
(* recursively call atp_tac_g on all subgoals *) 

221 
(* sg_term is the nth subgoal as a term  used*) 

222 
(* in proof reconstruction *) 

223 
(**********************************************) 

224 

17306  225 
fun isar_atp_aux thms thm n_subgoals (childin, childout, pid) axclauses = 
226 
let val tfree_lits = isar_atp_h thms 

227 
val prems = Thm.prems_of thm 

228 
val sign = sign_of_thm thm 

229 
val thmstring = string_of_thm thm 

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in 
17306  231 
debug ("in isar_atp_aux"); 
16904  232 
debug("thmstring in isar_atp_goal': " ^ thmstring); 
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(* go and call callResProvers with this subgoal *) 
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(* isar_atp_g tfree_lits sg_term (childin, childout, pid) k thm; *) 
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(* recursive call to pick up the remaining subgoals *) 
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(* isar_atp_goal' thm (k+1) n tfree_lits (childin, childout, pid) *) 
17306  237 
get_sko_thms tfree_lits sign prems (childin, childout, pid) 
238 
thm n_subgoals [] axclauses 

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end; 
15644  240 

241 
(******************************************************************) 

242 
(* called in Isar automatically *) 

243 
(* writes out the current clasimpset to a tptp file *) 

244 
(* passes all subgoals on to isar_atp_aux for further processing *) 

245 
(* turns off xsymbol at start of function, restoring it at end *) 

246 
(******************************************************************) 

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(*FIX changed to clasimp_file *) 
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val isar_atp' = setmp print_mode [] (fn (ctxt, thms, thm) => 
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if Thm.no_prems thm then () 
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else 
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let 
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val _= debug ("in isar_atp'") 
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val thy = ProofContext.theory_of ctxt 
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val prems = Thm.prems_of thm 
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val thms_string = Meson.concat_with_and (map string_of_thm thms) 
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val prems_string = Meson.concat_with_and (map (Sign.string_of_term thy) prems) 
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257 

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(*set up variables for writing out the clasimps to a tptp file*) 
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val (clause_arr, num_of_clauses, axclauses) = 
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ResClasimp.get_clasimp_lemmas thy (hd prems) (*FIXME: hack!! need to do all prems*) 
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val _ = debug ("claset and simprules total " ^ (string_of_int num_of_clauses)^ " clauses") 
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val (childin, childout, pid) = Watcher.createWatcher (thm, clause_arr, num_of_clauses) 
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val pid_string = 
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string_of_int (Word.toInt (Word.fromLargeWord (Posix.Process.pidToWord pid))) 
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in 
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debug ("initial thms: " ^ thms_string); 
267 
debug ("subgoals: " ^ prems_string); 

268 
debug ("pid: "^ pid_string); 

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isar_atp_aux thms thm (length prems) (childin, childout, pid) axclauses; 
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() 
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end); 
15608  272 

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fun get_thms_cs claset = 
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let val {safeEs, safeIs, hazEs, hazIs, ...} = rep_cs claset 
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in safeEs @ safeIs @ hazEs @ hazIs end; 
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fun append_name name [] _ = [] 
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 append_name name (thm :: thms) k = 
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Thm.name_thm ((name ^ "_" ^ string_of_int k), thm) :: append_name name thms (k + 1); 
15608  281 

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fun append_names (name :: names) (thms :: thmss) = 
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append_name name thms 0 :: append_names names thmss; 
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fun get_thms_ss [] = [] 
286 
 get_thms_ss thms = 

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let 
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val names = map Thm.name_of_thm thms 
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val thms' = map (mksimps mksimps_pairs) thms 
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val thms'' = append_names names thms' 

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in 
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ResLib.flat_noDup thms'' 
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end; 
15608  294 

15452  295 

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(* convert locally declared rules to axiom clauses *) 
297 

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fun subtract_simpset thy ctxt = 
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let 
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val rules1 = #rules (#1 (rep_ss (simpset_of thy))); 
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val rules2 = #rules (#1 (rep_ss (local_simpset_of ctxt))); 
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in map #thm (Net.subtract MetaSimplifier.eq_rrule rules1 rules2) end; 
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fun subtract_claset thy ctxt = 
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let 
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val (netI1, netE1) = #xtra_netpair (rep_cs (claset_of thy)); 
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val (netI2, netE2) = #xtra_netpair (rep_cs (local_claset_of ctxt)); 
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val subtract = map (#2 o #2) oo Net.subtract Tactic.eq_kbrl; 
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in subtract netI1 netI2 @ subtract netE1 netE2 end; 
15608  310 

311 

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(** the Isar toplevel hook **) 
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val invoke_atp = Toplevel.unknown_proof o Toplevel.keep (fn state => 
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let 
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val proof = Toplevel.proof_of state 
318 
val (ctxt, (_, goal)) = Proof.get_goal proof 

319 
handle Proof.STATE _ => error "No goal present"; 

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val thy = ProofContext.theory_of ctxt; 
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(* FIXME presently unused *) 
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val ss_thms = subtract_simpset thy ctxt; 
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val cs_thms = subtract_claset thy ctxt; 
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in 
17091  327 
debug ("initial thm in isar_atp: " ^ 
328 
Pretty.string_of (ProofContext.pretty_thm ctxt goal)); 

329 
debug ("subgoals in isar_atp: " ^ 

330 
Pretty.string_of (ProofContext.pretty_term ctxt 

331 
(Logic.mk_conjunction_list (Thm.prems_of goal)))); 

16904  332 
debug ("number of subgoals in isar_atp: " ^ string_of_int (Thm.nprems_of goal)); 
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hook_count := !hook_count +1; 
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debug ("in hook for time: " ^(string_of_int (!hook_count)) ); 
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ResClause.init thy; 
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isar_atp' (ctxt, ProofContext.prems_of ctxt, goal) 
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end); 
16357  338 

17091  339 
val call_atpP = 
340 
OuterSyntax.improper_command 

341 
"ProofGeneral.call_atp" 

342 
"call automatic theorem provers" 

343 
OuterKeyword.diag 

344 
(Scan.succeed (Toplevel.no_timing o invoke_atp)); 

345 

346 
val _ = OuterSyntax.add_parsers [call_atpP]; 

347 

15347  348 
end; 