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(* Title: HOL/Tools/Sledgehammer/sledgehammer_proof_reconstruct.ML 
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Author: Lawrence C Paulson and Claire Quigley, Cambridge University Computer Laboratory 
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Author: Jasmin Blanchette, TU Muenchen 
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Transfer of proofs from external provers. 
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*) 

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signature SLEDGEHAMMER_PROOF_RECONSTRUCT = 
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sig 
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type minimize_command = string list > string 
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type name_pool = Sledgehammer_FOL_Clause.name_pool 
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val chained_hint: string 
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val invert_const: string > string 
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val invert_type_const: string > string 
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val num_typargs: theory > string > int 
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val make_tvar: string > typ 
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val strip_prefix: string > string > string option 
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val metis_line: int > int > string list > string 
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val metis_proof_text: 
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minimize_command * string * string vector * thm * int 
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> string * string list 
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val isar_proof_text: 
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name_pool option > bool > int > bool > Proof.context 
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> minimize_command * string * string vector * thm * int 
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> string * string list 
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val proof_text: 
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bool > name_pool option > bool > int > bool > Proof.context 
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> minimize_command * string * string vector * thm * int 
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> string * string list 
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end; 
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structure Sledgehammer_Proof_Reconstruct : SLEDGEHAMMER_PROOF_RECONSTRUCT = 
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struct 
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open Sledgehammer_FOL_Clause 
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open Sledgehammer_Fact_Preprocessor 

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type minimize_command = string list > string 
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fun is_ident_char c = Char.isAlphaNum c orelse c = #"_" 
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fun is_head_digit s = Char.isDigit (String.sub (s, 0)) 
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fun is_axiom_clause_number thm_names line_num = 
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line_num <= Vector.length thm_names 

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fun ugly_name NONE s = s 
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 ugly_name (SOME the_pool) s = 
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case Symtab.lookup (snd the_pool) s of 
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SOME s' => s' 
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 NONE => s 
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val trace_path = Path.basic "sledgehammer_proof_trace" 
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fun trace_proof_msg f = 
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if !trace then File.append (File.tmp_path trace_path) (f ()) else (); 
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val string_of_thm = PrintMode.setmp [] o Display.string_of_thm 
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(**** PARSING OF TSTP FORMAT ****) 
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(* Syntax trees, either term list or formulae *) 
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datatype stree = SInt of int  SBranch of string * stree list; 
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fun atom x = SBranch (x, []) 
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fun scons (x, y) = SBranch ("cons", [x, y]) 
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val slist_of = List.foldl scons (atom "nil") 

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(*Strings enclosed in single quotes, e.g. filenames*) 
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val parse_quoted = $$ "'"  Scan.repeat (~$$ "'")  $$ "'" >> implode; 
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(*Integer constants, typically proof line numbers*) 
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val parse_integer = Scan.many1 is_head_digit >> (the o Int.fromString o implode) 
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(* needed for SPASS's output format *) 
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fun repair_bool_literal "true" = "c_True" 
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 repair_bool_literal "false" = "c_False" 
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fun repair_name pool "equal" = "c_equal" 
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 repair_name pool s = ugly_name pool s 
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(* Generalized firstorder terms, which include file names, numbers, etc. *) 
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(* The "x" argument is not strictly necessary, but without it Poly/ML loops 
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forever at compile time. *) 
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fun parse_term pool x = 
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(parse_quoted >> atom 
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 parse_integer >> SInt 

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 $$ "$"  Symbol.scan_id >> (atom o repair_bool_literal) 
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 (Symbol.scan_id >> repair_name pool) 
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 Scan.optional ($$ "("  parse_terms pool  $$ ")") [] >> SBranch 
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 $$ "("  parse_term pool  $$ ")" 
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 $$ "["  Scan.optional (parse_terms pool) []  $$ "]" >> slist_of) x 
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and parse_terms pool x = 
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(parse_term pool ::: Scan.repeat ($$ ","  parse_term pool)) x 
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fun negate_stree t = SBranch ("c_Not", [t]) 
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fun equate_strees t1 t2 = SBranch ("c_equal", [t1, t2]); 

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(* Apply equal or notequal to a term. *) 
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fun repair_predicate_term (t, NONE) = t 
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 repair_predicate_term (t1, SOME (NONE, t2)) = equate_strees t1 t2 
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 repair_predicate_term (t1, SOME (SOME _, t2)) = 
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negate_stree (equate_strees t1 t2) 
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fun parse_predicate_term pool = 
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parse_term pool  Scan.option (Scan.option ($$ "!")  $$ "=" 
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 parse_term pool) 
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>> repair_predicate_term 
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(*Literals can involve negation, = and !=.*) 
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fun parse_literal pool x = 
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($$ "~"  parse_literal pool >> negate_stree  parse_predicate_term pool) x 
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fun parse_literals pool = 
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parse_literal pool ::: Scan.repeat ($$ ""  parse_literal pool) 
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(*Clause: a list of literals separated by the disjunction sign*) 
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fun parse_clause pool = 
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$$ "("  parse_literals pool  $$ ")"  Scan.single (parse_literal pool) 
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fun ints_of_stree (SInt n) = cons n 
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 ints_of_stree (SBranch (_, ts)) = fold ints_of_stree ts 

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val parse_tstp_annotations = 

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Scan.optional ($$ ","  parse_term NONE 
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 Scan.option ($$ ","  parse_terms NONE) 
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>> (fn source => ints_of_stree source [])) [] 
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(* <cnf_annotated> ::= cnf(<name>, <formula_role>, <cnf_formula> <annotations>). 
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The <name> could be an identifier, but we assume integers. *) 
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fun retuple_tstp_line ((name, ts), deps) = (name, ts, deps) 
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fun parse_tstp_line pool = 
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(Scan.this_string "cnf"  $$ "(")  parse_integer  $$ "," 
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 Symbol.scan_id  $$ ","  parse_clause pool  parse_tstp_annotations 
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 $$ ")"  $$ "." 
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>> retuple_tstp_line 
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(**** PARSING OF SPASS OUTPUT ****) 
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(* SPASS returns clause references of the form "x.y". We ignore "y", whose role 
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is not clear anyway. *) 

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val parse_dot_name = parse_integer  $$ "."  parse_integer 

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val parse_spass_annotations = 
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Scan.optional ($$ ":"  Scan.repeat (parse_dot_name 

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 Scan.option ($$ ","))) [] 

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(* It is not clear why some literals are followed by sequences of stars. We 
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ignore them. *) 

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fun parse_starred_predicate_term pool = 
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parse_predicate_term pool  Scan.repeat ($$ "*"  $$ " ") 
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fun parse_horn_clause pool = 
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Scan.repeat (parse_starred_predicate_term pool)  $$ ""  $$ ">" 
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 Scan.repeat (parse_starred_predicate_term pool) 
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>> (fn ([], []) => [atom "c_False"] 
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 (clauses1, clauses2) => map negate_stree clauses1 @ clauses2) 

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(* Syntax: <name>[0:<inference><annotations>]  
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<cnf_formulas> > <cnf_formulas>. *) 
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fun retuple_spass_proof_line ((name, deps), ts) = (name, ts, deps) 
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fun parse_spass_proof_line pool = 
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parse_integer  $$ "["  $$ "0"  $$ ":"  Symbol.scan_id 
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 parse_spass_annotations  $$ "]"  $$ ""  $$ "" 

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 parse_horn_clause pool  $$ "." 
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>> retuple_spass_proof_line 
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fun parse_proof_line pool = 
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fst o (parse_tstp_line pool  parse_spass_proof_line pool) 
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(**** INTERPRETATION OF TSTP SYNTAX TREES ****) 
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exception STREE of stree; 
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(*If string s has the prefix s1, return the result of deleting it.*) 
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fun strip_prefix s1 s = 
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if String.isPrefix s1 s 
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then SOME (undo_ascii_of (String.extract (s, size s1, NONE))) 
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else NONE; 
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(*Invert the table of translations between Isabelle and ATPs*) 
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val type_const_trans_table_inv = 
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Symtab.make (map swap (Symtab.dest type_const_trans_table)); 
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fun invert_type_const c = 
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case Symtab.lookup type_const_trans_table_inv c of 
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SOME c' => c' 
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 NONE => c; 
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fun make_tvar s = TVar (("'" ^ s, 0), HOLogic.typeS); 
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fun make_tparam s = TypeInfer.param 0 (s, HOLogic.typeS) 
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fun make_var (b,T) = Var((b,0),T); 
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(*Type variables are given the basic sort, HOL.type. Some will later be constrained 
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by information from type literals, or by type inference.*) 
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fun type_of_stree t = 
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case t of 
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SInt _ => raise STREE t 
194 
 SBranch (a,ts) => 

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let val Ts = map type_of_stree ts 
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in 
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case strip_prefix tconst_prefix a of 
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SOME b => Type(invert_type_const b, Ts) 
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 NONE => 
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if not (null ts) then raise STREE t (*only tconsts have type arguments*) 
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else 
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case strip_prefix tfree_prefix a of 
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SOME b => TFree("'" ^ b, HOLogic.typeS) 
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 NONE => 
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case strip_prefix tvar_prefix a of 
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SOME b => make_tvar b 
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 NONE => make_tparam a (* Variable from the ATP, say "X1" *) 
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end; 
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(*Invert the table of translations between Isabelle and ATPs*) 
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val const_trans_table_inv = 
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Symtab.update ("fequal", "op =") 
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(Symtab.make (map swap (Symtab.dest const_trans_table))); 
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fun invert_const c = 
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case Symtab.lookup const_trans_table_inv c of 
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SOME c' => c' 
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 NONE => c; 
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(*The number of type arguments of a constant, zero if it's monomorphic*) 
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fun num_typargs thy s = length (Sign.const_typargs thy (s, Sign.the_const_type thy s)); 
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(*Generates a constant, given its type arguments*) 
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fun const_of thy (a,Ts) = Const(a, Sign.const_instance thy (a,Ts)); 
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(*Firstorder translation. No types are known for variables. HOLogic.typeT should allow 
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them to be inferred.*) 
22428  228 
fun term_of_stree args thy t = 
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case t of 
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SInt _ => raise STREE t 
231 
 SBranch ("hBOOL", [t]) => term_of_stree [] thy t (*ignore hBOOL*) 

232 
 SBranch ("hAPP", [t, u]) => term_of_stree (u::args) thy t 

233 
 SBranch (a, ts) => 

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case strip_prefix const_prefix a of 
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SOME "equal" => 
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list_comb(Const (@{const_name "op ="}, HOLogic.typeT), List.map (term_of_stree [] thy) ts) 
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 SOME b => 
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let val c = invert_const b 
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val nterms = length ts  num_typargs thy c 
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val us = List.map (term_of_stree [] thy) (List.take(ts,nterms) @ args) 
241 
(*Extra args from hAPP come AFTER any arguments given directly to the 

242 
constant.*) 

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val Ts = List.map type_of_stree (List.drop(ts,nterms)) 
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in list_comb(const_of thy (c, Ts), us) end 
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 NONE => (*a variable, not a constant*) 
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let val T = HOLogic.typeT 
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val opr = (*a Free variable is typically a Skolem function*) 
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case strip_prefix fixed_var_prefix a of 
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SOME b => Free(b,T) 
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 NONE => 
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case strip_prefix schematic_var_prefix a of 
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SOME b => make_var (b,T) 
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 NONE => make_var (a,T) (* Variable from the ATP, say "X1" *) 
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in list_comb (opr, List.map (term_of_stree [] thy) (ts@args)) end; 
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(* Type class literal applied to a type. Returns triple of polarity, class, 
257 
type. *) 

258 
fun constraint_of_stree pol (SBranch ("c_Not", [t])) = 

259 
constraint_of_stree (not pol) t 

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 constraint_of_stree pol t = case t of 
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SInt _ => raise STREE t 
262 
 SBranch (a, ts) => 

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(case (strip_prefix class_prefix a, map type_of_stree ts) of 
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(SOME b, [T]) => (pol, b, T) 
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 _ => raise STREE t); 
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(** Accumulate type constraints in a clause: negative type literals **) 
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fun addix (key,z) = Vartab.map_default (key,[]) (cons z); 
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fun add_constraint ((false, cl, TFree(a,_)), vt) = addix ((a,~1),cl) vt 
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 add_constraint ((false, cl, TVar(ix,_)), vt) = addix (ix,cl) vt 
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 add_constraint (_, vt) = vt; 
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(* Final treatment of the list of "real" literals from a clause. *) 
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fun finish [] = 

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(* No "real" literals means only type information. *) 

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HOLogic.true_const 

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 finish lits = 
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case filter_out (curry (op =) HOLogic.false_const) lits of 
281 
[] => HOLogic.false_const 

282 
 xs => foldr1 HOLogic.mk_disj (rev xs); 

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(*Accumulate sort constraints in vt, with "real" literals in lits.*) 
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fun lits_of_strees _ (vt, lits) [] = (vt, finish lits) 
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 lits_of_strees ctxt (vt, lits) (t::ts) = 
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lits_of_strees ctxt (add_constraint (constraint_of_stree true t, vt), lits) ts 
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handle STREE _ => 
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lits_of_strees ctxt (vt, term_of_stree [] (ProofContext.theory_of ctxt) t :: lits) ts; 
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(*Update TVars/TFrees with detected sort constraints.*) 
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fun repair_sorts vt = 
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let fun tysubst (Type (a, Ts)) = Type (a, map tysubst Ts) 
33035  294 
 tysubst (TVar (xi, s)) = TVar (xi, the_default s (Vartab.lookup vt xi)) 
295 
 tysubst (TFree (x, s)) = TFree (x, the_default s (Vartab.lookup vt (x, ~1))) 

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fun tmsubst (Const (a, T)) = Const (a, tysubst T) 
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 tmsubst (Free (a, T)) = Free (a, tysubst T) 
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 tmsubst (Var (xi, T)) = Var (xi, tysubst T) 
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 tmsubst (t as Bound _) = t 
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 tmsubst (Abs (a, T, t)) = Abs (a, tysubst T, tmsubst t) 
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 tmsubst (t $ u) = tmsubst t $ tmsubst u; 
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in not (Vartab.is_empty vt) ? tmsubst end; 
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(*Interpret a list of syntax trees as a clause, given by "real" literals and sort constraints. 
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vt0 holds the initial sort constraints, from the conjecture clauses.*) 
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fun clause_of_strees ctxt vt ts = 
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let val (vt, dt) = lits_of_strees ctxt (vt, []) ts in 
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dt > repair_sorts vt > TypeInfer.constrain HOLogic.boolT 
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> Syntax.check_term ctxt 
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end 
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29268  312 
fun gen_all_vars t = fold_rev Logic.all (OldTerm.term_vars t) t; 
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313 

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fun decode_proof_step vt0 (name, ts, deps) ctxt = 
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let val cl = clause_of_strees ctxt vt0 ts in 
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((name, cl, deps), fold Variable.declare_term (OldTerm.term_frees cl) ctxt) 
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317 
end 
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318 

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(** Global sort constraints on TFrees (from tfree_tcs) are positive unit clauses. **) 
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320 

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fun add_tfree_constraint ((true, cl, TFree(a,_)), vt) = addix ((a,~1),cl) vt 
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 add_tfree_constraint (_, vt) = vt; 
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323 

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fun tfree_constraints_of_clauses vt [] = vt 
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 tfree_constraints_of_clauses vt ([lit]::tss) = 
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(tfree_constraints_of_clauses (add_tfree_constraint (constraint_of_stree true lit, vt)) tss 
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327 
handle STREE _ => (*not a positive type constraint: ignore*) 
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328 
tfree_constraints_of_clauses vt tss) 
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 tfree_constraints_of_clauses vt (_::tss) = tfree_constraints_of_clauses vt tss; 
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330 

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331 

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332 
(**** Translation of TSTP files to Isar Proofs ****) 
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333 

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fun decode_proof_steps ctxt tuples = 
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335 
let val vt0 = tfree_constraints_of_clauses Vartab.empty (map #2 tuples) in 
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#1 (fold_map (decode_proof_step vt0) tuples ctxt) 
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337 
end 
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338 

23519  339 
(** Finding a matching assumption. The literals may be permuted, and variable names 
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340 
may disagree. We must try all combinations of literals (quadratic!) and 
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341 
match the variable names consistently. **) 
23519  342 

35865  343 
fun strip_alls_aux n (Const(@{const_name all}, _)$Abs(a,T,t)) = 
23519  344 
strip_alls_aux (n+1) (subst_bound (Var ((a,n), T), t)) 
345 
 strip_alls_aux _ t = t; 

346 

347 
val strip_alls = strip_alls_aux 0; 

348 

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349 
exception MATCH_LITERAL of unit 
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350 

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351 
(* Remark 1: Ignore types. They are not to be trusted. 
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352 
Remark 2: Ignore order of arguments for equality. SPASS sometimes swaps 
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353 
them for no apparent reason. *) 
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354 
fun match_literal (Const (@{const_name "op ="}, _) $ t1 $ u1) 
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(Const (@{const_name "op ="}, _) $ t2 $ u2) env = 
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356 
(env > match_literal t1 t2 > match_literal u1 u2 
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357 
handle MATCH_LITERAL () => 
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358 
env > match_literal t1 u2 > match_literal u1 t2) 
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359 
 match_literal (t1 $ u1) (t2 $ u2) env = 
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360 
env > match_literal t1 t2 > match_literal u1 u2 
31038  361 
 match_literal (Abs (_,_,t1)) (Abs (_,_,t2)) env = 
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362 
match_literal t1 t2 env 
31038  363 
 match_literal (Bound i1) (Bound i2) env = 
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364 
if i1=i2 then env else raise MATCH_LITERAL () 
31038  365 
 match_literal (Const(a1,_)) (Const(a2,_)) env = 
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366 
if a1=a2 then env else raise MATCH_LITERAL () 
31038  367 
 match_literal (Free(a1,_)) (Free(a2,_)) env = 
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368 
if a1=a2 then env else raise MATCH_LITERAL () 
23519  369 
 match_literal (Var(ix1,_)) (Var(ix2,_)) env = insert (op =) (ix1,ix2) env 
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370 
 match_literal _ _ _ = raise MATCH_LITERAL () 
23519  371 

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372 
(* Checking that all variable associations are unique. The list "env" contains 
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373 
no repetitions, but does it contain say (x, y) and (y, y)? *) 
31038  374 
fun good env = 
23519  375 
let val (xs,ys) = ListPair.unzip env 
376 
in not (has_duplicates (op=) xs orelse has_duplicates (op=) ys) end; 

377 

378 
(*Match one list of literals against another, ignoring types and the order of 

379 
literals. Sorting is unreliable because we don't have types or variable names.*) 

380 
fun matches_aux _ [] [] = true 

381 
 matches_aux env (lit::lits) ts = 

382 
let fun match1 us [] = false 

383 
 match1 us (t::ts) = 

384 
let val env' = match_literal lit t env 

31038  385 
in (good env' andalso matches_aux env' lits (us@ts)) orelse 
386 
match1 (t::us) ts 

23519  387 
end 
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388 
handle MATCH_LITERAL () => match1 (t::us) ts 
31038  389 
in match1 [] ts end; 
23519  390 

391 
(*Is this length test useful?*) 

31038  392 
fun matches (lits1,lits2) = 
393 
length lits1 = length lits2 andalso 

23519  394 
matches_aux [] (map Envir.eta_contract lits1) (map Envir.eta_contract lits2); 
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395 

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396 
fun permuted_clause t = 
24958  397 
let val lits = HOLogic.disjuncts t 
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398 
fun perm [] = NONE 
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399 
 perm (ctm::ctms) = 
24958  400 
if matches (lits, HOLogic.disjuncts (HOLogic.dest_Trueprop (strip_alls ctm))) 
23519  401 
then SOME ctm else perm ctms 
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402 
in perm end; 
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403 

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404 
(*ctms is a list of conjecture clauses as yielded by Isabelle. Those returned by the 
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405 
ATP may have their literals reordered.*) 
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406 
fun isar_proof_body ctxt sorts ctms = 
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407 
let 
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408 
val _ = trace_proof_msg (K "\n\nisar_proof_body: start\n") 
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409 
val string_of_term = 
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410 
PrintMode.setmp (filter (curry (op =) Symbol.xsymbolsN) 
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411 
(print_mode_value ())) 
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412 
(Syntax.string_of_term ctxt) 
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413 
fun have_or_show "show" _ = " show \"" 
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414 
 have_or_show have lname = " " ^ have ^ " " ^ lname ^ ": \"" 
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415 
fun do_line _ (lname, t, []) = 
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416 
(* No depedencies: it's a conjecture clause, with no proof. *) 
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417 
(case permuted_clause t ctms of 
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418 
SOME u => " assume " ^ lname ^ ": \"" ^ string_of_term u ^ "\"\n" 
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419 
 NONE => raise TERM ("Sledgehammer_Proof_Reconstruct.isar_proof_body", 
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420 
[t])) 
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421 
 do_line have (lname, t, deps) = 
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422 
have_or_show have lname ^ 
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423 
string_of_term (gen_all_vars (HOLogic.mk_Trueprop t)) ^ 
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424 
"\"\n by (metis " ^ space_implode " " deps ^ ")\n" 
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425 
fun do_lines [(lname, t, deps)] = [do_line "show" (lname, t, deps)] 
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426 
 do_lines ((lname, t, deps) :: lines) = 
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427 
do_line "have" (lname, t, deps) :: do_lines lines 
36064
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428 
in setmp_CRITICAL show_sorts sorts do_lines end; 
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429 

35869
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430 
fun unequal t (_, t', _) = not (t aconv t'); 
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431 

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432 
(*No "real" literals means only type information*) 
23519  433 
fun eq_types t = t aconv HOLogic.true_const; 
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434 

36395  435 
fun replace_dep (old, new) dep = if dep = old then new else [dep] 
436 
fun replace_deps p (num, t, deps) = 

437 
(num, t, fold (union (op =) o replace_dep p) deps []) 

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438 

22491
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439 
(*Discard axioms; consolidate adjacent lines that prove the same clause, since they differ 
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440 
only in type information.*) 
36395  441 
fun add_proof_line thm_names (num, t, []) lines = 
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442 
(* No dependencies: axiom or conjecture clause *) 
36395  443 
if is_axiom_clause_number thm_names num then 
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444 
(* Axioms are not proof lines *) 
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445 
if eq_types t then 
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446 
(* Must be clsrel/clsarity: type information, so delete refs to it *) 
36395  447 
map (replace_deps (num, [])) lines 
36291
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448 
else 
b4c2043cc96c
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449 
(case take_prefix (unequal t) lines of 
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450 
(_,[]) => lines (*no repetition of proof line*) 
36395  451 
 (pre, (num', _, _) :: post) => (*repetition: replace later line by earlier one*) 
452 
pre @ map (replace_deps (num', [num])) post) 

22470
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453 
else 
36395  454 
(num, t, []) :: lines 
455 
 add_proof_line _ (num, t, deps) lines = 

456 
if eq_types t then (num, t, deps) :: lines 

22491
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457 
(*Type information will be deleted later; skip repetition test.*) 
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458 
else (*FIXME: Doesn't this code risk conflating proofs involving different types??*) 
35869
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459 
case take_prefix (unequal t) lines of 
36395  460 
(_,[]) => (num, t, deps) :: lines (*no repetition of proof line*) 
461 
 (pre, (num', t', _) :: post) => 

462 
(num, t', deps) :: (*repetition: replace later line by earlier one*) 

463 
(pre @ map (replace_deps (num', [num])) post); 

22044
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464 

22470
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465 
(*Recursively delete empty lines (type information) from the proof.*) 
36395  466 
fun add_nonnull_prfline ((num, t, []), lines) = (*no dependencies, so a conjecture clause*) 
22491
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467 
if eq_types t (*must be type information, tfree_tcs, clsrel, clsarity: delete refs to it*) 
36395  468 
then delete_dep num lines 
469 
else (num, t, []) :: lines 

470 
 add_nonnull_prfline ((num, t, deps), lines) = (num, t, deps) :: lines 

471 
and delete_dep num lines = 

472 
List.foldr add_nonnull_prfline [] (map (replace_deps (num, [])) lines); 

22470
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473 

35865  474 
fun bad_free (Free (a,_)) = String.isPrefix skolem_prefix a 
22731
abfdccaed085
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475 
 bad_free _ = false; 
abfdccaed085
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476 

23139
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477 
(*TVars are forbidden in goals. Also, we don't want lines with <2 dependencies. 
22491
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changeset

478 
To further compress proofs, setting modulus:=n deletes every nth line, and nlines 
535fbed859da
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479 
counts the number of proof lines processed so far. 
535fbed859da
Numerous bug fixes. Type clauses distinguished from empty clauses. Working proof reduction.
paulson
parents:
22470
diff
changeset

480 
Deleted lines are replaced by their own dependencies. Note that the "add_nonnull_prfline" 
22044
6c0702a96076
More compact proof reconstruction: lines having fewer than !min_deps dependences are folded
paulson
parents:
22012
diff
changeset

481 
phase may delete some dependencies, hence this phase comes later.*) 
36395  482 
fun add_wanted_prfline ctxt _ ((num, t, []), (nlines, lines)) = 
483 
(nlines, (num, t, []) :: lines) (*conjecture clauses must be kept*) 

484 
 add_wanted_prfline ctxt modulus ((num, t, deps), (nlines, lines)) = 

29272  485 
if eq_types t orelse not (null (Term.add_tvars t [])) orelse 
29268  486 
exists_subterm bad_free t orelse 
24937
340523598914
contextbased treatment of generalization; also handling TFrees in axiom clauses
paulson
parents:
24920
diff
changeset

487 
(not (null lines) andalso (*final line can't be deleted for these reasons*) 
36064
48aec67c284f
added "modulus" and "sorts" options to control Sledgehammer's Isar proof output
blanchet
parents:
36063
diff
changeset

488 
(length deps < 2 orelse nlines mod modulus <> 0)) 
36395  489 
then (nlines+1, map (replace_deps (num, deps)) lines) (*Delete line*) 
490 
else (nlines+1, (num, t, deps) :: lines); 

21978
72c21698a055
Contains old Tools/ATP/AtpCommunication.ML, plus proof reconstruction
paulson
parents:
diff
changeset

491 

21999
0cf192e489e2
improvements to proof reconstruction. Some files loaded in a different order
paulson
parents:
21979
diff
changeset

492 
(*Replace numeric proof lines by strings, either from thm_names or sequential line numbers*) 
21978
72c21698a055
Contains old Tools/ATP/AtpCommunication.ML, plus proof reconstruction
paulson
parents:
diff
changeset

493 
fun stringify_deps thm_names deps_map [] = [] 
36395  494 
 stringify_deps thm_names deps_map ((num, t, deps) :: lines) = 
495 
if is_axiom_clause_number thm_names num then 

496 
(Vector.sub (thm_names, num  1), t, []) :: 

497 
stringify_deps thm_names deps_map lines 

498 
else 

499 
let 

500 
val lname = Int.toString (length deps_map) 

501 
fun fix num = if is_axiom_clause_number thm_names num 

502 
then SOME(Vector.sub(thm_names,num1)) 

503 
else AList.lookup (op =) deps_map num; 

504 
in 

505 
(lname, t, map_filter fix (distinct (op=) deps)) :: 

506 
stringify_deps thm_names ((num, lname) :: deps_map) lines 

507 
end 

21978
72c21698a055
Contains old Tools/ATP/AtpCommunication.ML, plus proof reconstruction
paulson
parents:
diff
changeset

508 

36063
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

509 
fun isar_proof_start i = 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

510 
(if i = 1 then "" else "prefer " ^ string_of_int i ^ "\n") ^ 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

511 
"proof (neg_clausify)\n"; 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

512 
fun isar_fixes [] = "" 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

513 
 isar_fixes ts = " fix " ^ space_implode " " ts ^ "\n"; 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

514 
fun isar_proof_end 1 = "qed" 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

515 
 isar_proof_end _ = "next" 
21979
80e10f181c46
Improvements to proof reconstruction. Now "fixes" is inserted
paulson
parents:
21978
diff
changeset

516 

36393
be73a2b2443b
support readable names even when Isar proof reconstruction is enabled  useful for debugging
blanchet
parents:
36392
diff
changeset

517 
fun isar_proof_from_atp_proof pool modulus sorts ctxt cnfs thm_names goal i = 
35868
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

518 
let 
36291
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

519 
val _ = trace_proof_msg (K "\nisar_proof_from_atp_proof: start\n") 
36393
be73a2b2443b
support readable names even when Isar proof reconstruction is enabled  useful for debugging
blanchet
parents:
36392
diff
changeset

520 
val tuples = map (parse_proof_line pool o explode) cnfs 
35868
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

521 
val _ = trace_proof_msg (fn () => 
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

522 
Int.toString (length tuples) ^ " tuples extracted\n") 
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

523 
val ctxt = ProofContext.set_mode ProofContext.mode_schematic ctxt 
36291
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

524 
val raw_lines = 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

525 
fold_rev (add_proof_line thm_names) (decode_proof_steps ctxt tuples) [] 
35868
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

526 
val _ = trace_proof_msg (fn () => 
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

527 
Int.toString (length raw_lines) ^ " raw_lines extracted\n") 
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

528 
val nonnull_lines = List.foldr add_nonnull_prfline [] raw_lines 
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

529 
val _ = trace_proof_msg (fn () => 
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

530 
Int.toString (length nonnull_lines) ^ " nonnull_lines extracted\n") 
36064
48aec67c284f
added "modulus" and "sorts" options to control Sledgehammer's Isar proof output
blanchet
parents:
36063
diff
changeset

531 
val (_, lines) = List.foldr (add_wanted_prfline ctxt modulus) (0,[]) nonnull_lines 
35868
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

532 
val _ = trace_proof_msg (fn () => 
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

533 
Int.toString (length lines) ^ " lines extracted\n") 
36063
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

534 
val (ccls, fixes) = neg_conjecture_clauses ctxt goal i 
35868
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

535 
val _ = trace_proof_msg (fn () => 
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

536 
Int.toString (length ccls) ^ " conjecture clauses\n") 
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

537 
val ccls = map forall_intr_vars ccls 
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

538 
val _ = app (fn th => trace_proof_msg 
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

539 
(fn () => "\nccl: " ^ string_of_thm ctxt th)) ccls 
36064
48aec67c284f
added "modulus" and "sorts" options to control Sledgehammer's Isar proof output
blanchet
parents:
36063
diff
changeset

540 
val body = isar_proof_body ctxt sorts (map prop_of ccls) 
35869
cac366550624
start work on direct proof reconstruction for Sledgehammer
blanchet
parents:
35868
diff
changeset

541 
(stringify_deps thm_names [] lines) 
36063
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

542 
val n = Logic.count_prems (prop_of goal) 
36291
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

543 
val _ = trace_proof_msg (K "\nisar_proof_from_atp_proof: finishing\n") 
36063
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

544 
in 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

545 
isar_proof_start i ^ isar_fixes (map #1 fixes) ^ implode body ^ 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

546 
isar_proof_end n ^ "\n" 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

547 
end 
36288  548 
handle STREE _ => raise Fail "Cannot parse ATP output"; 
21978
72c21698a055
Contains old Tools/ATP/AtpCommunication.ML, plus proof reconstruction
paulson
parents:
diff
changeset

549 

72c21698a055
Contains old Tools/ATP/AtpCommunication.ML, plus proof reconstruction
paulson
parents:
diff
changeset

550 

33310  551 
(* === EXTRACTING LEMMAS === *) 
36223
217ca1273786
make Sledgehammer's minimizer also minimize Isar proofs
blanchet
parents:
36140
diff
changeset

552 
(* A list consisting of the first number in each line is returned. 
36395  553 
TSTP: Interesting lines have the form "cnf(108, axiom, ...)", where the 
36223
217ca1273786
make Sledgehammer's minimizer also minimize Isar proofs
blanchet
parents:
36140
diff
changeset

554 
number (108) is extracted. 
36395  555 
SPASS: Lines have the form "108[0:Inp] ...", where the first number (108) is 
36223
217ca1273786
make Sledgehammer's minimizer also minimize Isar proofs
blanchet
parents:
36140
diff
changeset

556 
extracted. *) 
36395  557 
fun extract_clause_numbers_in_proof proof = 
35865  558 
let 
36395  559 
val tokens_of = String.tokens (not o is_ident_char) 
560 
fun extract_num ("cnf" :: num :: _ :: _) = Int.fromString num 

561 
 extract_num (num :: "0" :: "Inp" :: _) = Int.fromString num 

562 
 extract_num _ = NONE 

563 
in proof > split_lines > map_filter (extract_num o tokens_of) end 

33310  564 

36395  565 
(* Used to label theorems chained into the Sledgehammer call (or rather 
566 
goal?) *) 

567 
val chained_hint = "sledgehammer_chained" 

35865  568 

36063
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

569 
fun apply_command _ 1 = "by " 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

570 
 apply_command 1 _ = "apply " 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

571 
 apply_command i _ = "prefer " ^ string_of_int i ^ " apply " 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

572 
fun metis_command i n [] = 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

573 
apply_command i n ^ "metis" 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

574 
 metis_command i n xs = 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

575 
apply_command i n ^ "(metis " ^ space_implode " " xs ^ ")" 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

576 
fun metis_line i n xs = 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

577 
"Try this command: " ^ 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

578 
Markup.markup Markup.sendback (metis_command i n xs) ^ ".\n" 
36281
dbbf4d5d584d
pass relevant options from "sledgehammer" to "sledgehammer minimize";
blanchet
parents:
36231
diff
changeset

579 
fun minimize_line _ [] = "" 
dbbf4d5d584d
pass relevant options from "sledgehammer" to "sledgehammer minimize";
blanchet
parents:
36231
diff
changeset

580 
 minimize_line minimize_command facts = 
dbbf4d5d584d
pass relevant options from "sledgehammer" to "sledgehammer minimize";
blanchet
parents:
36231
diff
changeset

581 
case minimize_command facts of 
dbbf4d5d584d
pass relevant options from "sledgehammer" to "sledgehammer minimize";
blanchet
parents:
36231
diff
changeset

582 
"" => "" 
dbbf4d5d584d
pass relevant options from "sledgehammer" to "sledgehammer minimize";
blanchet
parents:
36231
diff
changeset

583 
 command => 
36065  584 
"To minimize the number of lemmas, try this command: " ^ 
36281
dbbf4d5d584d
pass relevant options from "sledgehammer" to "sledgehammer minimize";
blanchet
parents:
36231
diff
changeset

585 
Markup.markup Markup.sendback command ^ ".\n" 
31840
beeaa1ed1f47
check if conjectures have been used in proof
immler@in.tum.de
parents:
31479
diff
changeset

586 

36287
96f45c5ffb36
if Isar proof reconstruction is not supported, tell the user so they don't wonder why their "isar_proof" option did nothing
blanchet
parents:
36285
diff
changeset

587 
fun metis_proof_text (minimize_command, proof, thm_names, goal, i) = 
36063
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

588 
let 
36231
bede2d49ba3b
get rid of "conjecture_pos", which is no longer necessary now that it's Metis's job, not Sledgehammer's, to report inconsistent contexts
blanchet
parents:
36225
diff
changeset

589 
val lemmas = 
36395  590 
proof > extract_clause_numbers_in_proof 
591 
> filter (is_axiom_clause_number thm_names) 

36231
bede2d49ba3b
get rid of "conjecture_pos", which is no longer necessary now that it's Metis's job, not Sledgehammer's, to report inconsistent contexts
blanchet
parents:
36225
diff
changeset

592 
> map (fn i => Vector.sub (thm_names, i  1)) 
36395  593 
> filter_out (fn s => s = "??.unknown" orelse s = chained_hint) 
36231
bede2d49ba3b
get rid of "conjecture_pos", which is no longer necessary now that it's Metis's job, not Sledgehammer's, to report inconsistent contexts
blanchet
parents:
36225
diff
changeset

594 
> sort_distinct string_ord 
36063
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

595 
val n = Logic.count_prems (prop_of goal) 
36395  596 
in (metis_line i n lemmas ^ minimize_line minimize_command lemmas, lemmas) end 
31037
ac8669134e7a
added Philipp Meyer's implementation of AtpMinimal
immler@in.tum.de
parents:
30874
diff
changeset

597 

36291
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

598 
val is_proof_line = String.isPrefix "cnf(" orf String.isSubstring "" 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

599 

b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

600 
fun do_space c = if Char.isSpace c then "" else str c 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

601 

b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

602 
fun strip_spaces_in_list [] = "" 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

603 
 strip_spaces_in_list [c1] = do_space c1 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

604 
 strip_spaces_in_list [c1, c2] = do_space c1 ^ do_space c2 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

605 
 strip_spaces_in_list (c1 :: c2 :: c3 :: cs) = 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

606 
if Char.isSpace c1 then 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

607 
strip_spaces_in_list (c2 :: c3 :: cs) 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

608 
else if Char.isSpace c2 then 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

609 
if Char.isSpace c3 then 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

610 
strip_spaces_in_list (c1 :: c3 :: cs) 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

611 
else 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

612 
str c1 ^ 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

613 
(if is_ident_char c1 andalso is_ident_char c3 then " " else "") ^ 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

614 
strip_spaces_in_list (c3 :: cs) 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

615 
else 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

616 
str c1 ^ strip_spaces_in_list (c2 :: c3 :: cs) 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

617 

b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

618 
val strip_spaces = strip_spaces_in_list o String.explode 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

619 

36393
be73a2b2443b
support readable names even when Isar proof reconstruction is enabled  useful for debugging
blanchet
parents:
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620 
fun isar_proof_text pool debug modulus sorts ctxt 
36287
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if Isar proof reconstruction is not supported, tell the user so they don't wonder why their "isar_proof" option did nothing
blanchet
parents:
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diff
changeset

621 
(minimize_command, proof, thm_names, goal, i) = 
33310  622 
let 
36369
d2cd0d04b8e6
handle ATP proof delimiters in a cleaner, more extensible fashion
blanchet
parents:
36293
diff
changeset

623 
val cnfs = proof > split_lines > map strip_spaces > filter is_proof_line 
36223
217ca1273786
make Sledgehammer's minimizer also minimize Isar proofs
blanchet
parents:
36140
diff
changeset

624 
val (one_line_proof, lemma_names) = 
36287
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if Isar proof reconstruction is not supported, tell the user so they don't wonder why their "isar_proof" option did nothing
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parents:
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diff
changeset

625 
metis_proof_text (minimize_command, proof, thm_names, goal, i) 
35868
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
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parents:
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diff
changeset

626 
val tokens = String.tokens (fn c => c = #" ") one_line_proof 
36283
25e69e93954d
failure of reconstructing the Isar proof (e.g., exception) should not prevent Sledgehammer from showing the short oneliner proof  but in "debug" mode we do want to know what the exception is
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parents:
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diff
changeset

627 
fun isar_proof_for () = 
36393
be73a2b2443b
support readable names even when Isar proof reconstruction is enabled  useful for debugging
blanchet
parents:
36392
diff
changeset

628 
case isar_proof_from_atp_proof pool modulus sorts ctxt cnfs thm_names goal 
be73a2b2443b
support readable names even when Isar proof reconstruction is enabled  useful for debugging
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parents:
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diff
changeset

629 
i of 
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failure of reconstructing the Isar proof (e.g., exception) should not prevent Sledgehammer from showing the short oneliner proof  but in "debug" mode we do want to know what the exception is
blanchet
parents:
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diff
changeset

630 
"" => "" 
36285
d868b34d604c
Isar proof reconstruction: type variables introduced by the ATP should be treated as type parameters for type inference purposes;
blanchet
parents:
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diff
changeset

631 
 isar_proof => 
d868b34d604c
Isar proof reconstruction: type variables introduced by the ATP should be treated as type parameters for type inference purposes;
blanchet
parents:
36283
diff
changeset

632 
"\nStructured proof:\n" ^ Markup.markup Markup.sendback isar_proof 
35868
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

633 
val isar_proof = 
36283
25e69e93954d
failure of reconstructing the Isar proof (e.g., exception) should not prevent Sledgehammer from showing the short oneliner proof  but in "debug" mode we do want to know what the exception is
blanchet
parents:
36281
diff
changeset

634 
if member (op =) tokens chained_hint then 
25e69e93954d
failure of reconstructing the Isar proof (e.g., exception) should not prevent Sledgehammer from showing the short oneliner proof  but in "debug" mode we do want to know what the exception is
blanchet
parents:
36281
diff
changeset

635 
"" 
25e69e93954d
failure of reconstructing the Isar proof (e.g., exception) should not prevent Sledgehammer from showing the short oneliner proof  but in "debug" mode we do want to know what the exception is
blanchet
parents:
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diff
changeset

636 
else if debug then 
25e69e93954d
failure of reconstructing the Isar proof (e.g., exception) should not prevent Sledgehammer from showing the short oneliner proof  but in "debug" mode we do want to know what the exception is
blanchet
parents:
36281
diff
changeset

637 
isar_proof_for () 
25e69e93954d
failure of reconstructing the Isar proof (e.g., exception) should not prevent Sledgehammer from showing the short oneliner proof  but in "debug" mode we do want to know what the exception is
blanchet
parents:
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diff
changeset

638 
else 
25e69e93954d
failure of reconstructing the Isar proof (e.g., exception) should not prevent Sledgehammer from showing the short oneliner proof  but in "debug" mode we do want to know what the exception is
blanchet
parents:
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diff
changeset

639 
try isar_proof_for () 
36287
96f45c5ffb36
if Isar proof reconstruction is not supported, tell the user so they don't wonder why their "isar_proof" option did nothing
blanchet
parents:
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diff
changeset

640 
> the_default "Warning: The Isar proof construction failed.\n" 
36283
25e69e93954d
failure of reconstructing the Isar proof (e.g., exception) should not prevent Sledgehammer from showing the short oneliner proof  but in "debug" mode we do want to know what the exception is
blanchet
parents:
36281
diff
changeset

641 
in (one_line_proof ^ isar_proof, lemma_names) end 
21978
72c21698a055
Contains old Tools/ATP/AtpCommunication.ML, plus proof reconstruction
paulson
parents:
diff
changeset

642 

36393
be73a2b2443b
support readable names even when Isar proof reconstruction is enabled  useful for debugging
blanchet
parents:
36392
diff
changeset

643 
fun proof_text isar_proof pool debug modulus sorts ctxt = 
be73a2b2443b
support readable names even when Isar proof reconstruction is enabled  useful for debugging
blanchet
parents:
36392
diff
changeset

644 
if isar_proof then isar_proof_text pool debug modulus sorts ctxt 
36288  645 
else metis_proof_text 
36223
217ca1273786
make Sledgehammer's minimizer also minimize Isar proofs
blanchet
parents:
36140
diff
changeset

646 

31038  647 
end; 