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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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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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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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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 > 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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val trace_proof_path = Path.basic "atp_trace"; 
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fun trace_proof_msg f = 

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if !trace then File.append (File.tmp_path trace_proof_path) (f ()) else (); 

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proper context for Display.pretty_thm etc. or oldstyle versions Display.pretty_thm_global, Display.pretty_thm_without_context etc.;
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fun string_of_thm ctxt = PrintMode.setmp [] (Display.string_of_thm ctxt); 
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Attributes sledgehammer_full, sledgehammer_modulus, sledgehammer_sorts
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fun is_ident_char c = Char.isAlphaNum c orelse c = #"_" 
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fun is_axiom thm_names line_no = line_no <= Vector.length thm_names 
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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 = Int of int  Br of string * stree list; 
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fun atom x = Br(x,[]); 
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fun scons (x,y) = Br("cons", [x,y]); 
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val listof = List.foldl scons (atom "nil"); 
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(*Strings enclosed in single quotes, e.g. filenames*) 
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val quoted = $$ "'"  Scan.repeat (~$$ "'")  $$ "'" >> implode; 
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(*Intended for $true and $false*) 
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fun tf s = "c_" ^ str (Char.toUpper (String.sub(s,0))) ^ String.extract(s,1,NONE); 
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val truefalse = $$ "$"  Symbol.scan_id >> (atom o tf); 
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(*Integer constants, typically proof line numbers*) 
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fun is_digit s = Char.isDigit (String.sub(s,0)); 
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val integer = Scan.many1 is_digit >> (the o Int.fromString o implode); 
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(* needed for SPASS's output format *) 
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fun fix_symbol "equal" = "c_equal" 
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 fix_symbol s = s 
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(*Generalized FO terms, which include filenames, numbers, etc.*) 
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fun term x = (quoted >> atom  integer >> Int  truefalse 
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 (Symbol.scan_id >> fix_symbol) 
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 Scan.optional ($$ "("  terms  $$ ")") [] >> Br 
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 $$ "("  term  $$ ")" 
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 $$ "["  Scan.optional terms []  $$ "]" >> listof) x 
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and terms x = (term ::: Scan.repeat ($$ ","  term)) x 
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fun negate t = Br ("c_Not", [t]) 
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fun equate t1 t2 = Br ("c_equal", [t1, t2]); 
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(*Apply equal or notequal to a term*) 
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fun syn_equal (t, NONE) = t 
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 syn_equal (t1, SOME (NONE, t2)) = equate t1 t2 
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 syn_equal (t1, SOME (SOME _, t2)) = negate (equate t1 t2) 
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(*Literals can involve negation, = and !=.*) 
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fun literal x = 
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($$ "~"  literal >> negate 
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 (term  Scan.option (Scan.option ($$ "!")  $$ "="  term) 
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>> syn_equal)) x 
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val literals = literal ::: Scan.repeat ($$ ""  literal); 
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(*Clause: a list of literals separated by the disjunction sign*) 
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val clause = $$ "("  literals  $$ ")"  Scan.single literal; 
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fun ints_of_stree (Int n) = cons n 
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 ints_of_stree (Br (_, ts)) = fold ints_of_stree ts 
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val tstp_annotations = 
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Scan.optional ($$ ","  term  Scan.option ($$ ","  terms) 
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>> (fn source => ints_of_stree source [])) [] 
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fun retuple_tstp_line ((name, ts), deps) = (name, ts, deps) 
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(* <cnf_annotated> ::= cnf(<name>, <formula_role>, <cnf_formula> <annotations>). 
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The <name> could be an identifier, but we assume integers. *) 
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val parse_tstp_line = 
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(Scan.this_string "cnf"  $$ "(")  integer  $$ ","  Symbol.scan_id 
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 $$ ","  clause  tstp_annotations  $$ ")"  $$ "." 
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>> retuple_tstp_line 
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(**** PARSING OF SPASS OUTPUT ****) 
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val dot_name = integer  $$ "."  integer 
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val spass_annotations = 
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Scan.optional ($$ ":"  Scan.repeat (dot_name  Scan.option ($$ ","))) [] 
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val starred_literal = literal  Scan.repeat ($$ "*"  $$ " ") 
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val horn_clause = 
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Scan.repeat starred_literal  $$ ""  $$ ">" 
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 Scan.repeat starred_literal 
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>> (fn ([], []) => [atom (tf "false")] 
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 (clauses1, clauses2) => map negate clauses1 @ clauses2) 
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fun retuple_spass_proof_line ((name, deps), ts) = (name, ts, deps) 
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(* Syntax: <name>[0:<inference><annotations>]  > <cnf_formula> **. *) 
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val parse_spass_proof_line = 
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integer  $$ "["  $$ "0"  $$ ":"  Symbol.scan_id 
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 spass_annotations  $$ "]"  $$ ""  $$ ""  horn_clause 
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 $$ "." 
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>> retuple_spass_proof_line 
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val parse_proof_line = fst o (parse_tstp_line  parse_spass_proof_line) 
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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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Int _ => raise STREE t 
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 Br (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  206 
fun term_of_stree args thy t = 
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case t of 
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Int _ => raise STREE t 
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 Br ("hBOOL",[t]) => term_of_stree [] thy t (*ignore hBOOL*) 
210 
 Br ("hAPP",[t,u]) => term_of_stree (u::args) thy t 

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 Br (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) 
219 
(*Extra args from hAPP come AFTER any arguments given directly to the 

220 
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" *) 
23519  232 
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, type.*) 
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fun constraint_of_stree pol (Br("c_Not",[t])) = constraint_of_stree (not pol) t 
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 constraint_of_stree pol t = case t of 
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Int _ => raise STREE t 
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 Br (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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242 

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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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(*False literals (which E includes in its proofs) are deleted*) 
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val nofalses = filter (not o equal HOLogic.false_const); 
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(*Final treatment of the list of "real" literals from a clause.*) 
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fun finish [] = HOLogic.true_const (*No "real" literals means only type information*) 
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 finish lits = 
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case nofalses lits of 
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[] => HOLogic.false_const (*The empty clause, since we started with real literals*) 
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 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 fix_sorts vt = 
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let fun tysubst (Type (a, Ts)) = Type (a, map tysubst Ts) 
33035  271 
 tysubst (TVar (xi, s)) = TVar (xi, the_default s (Vartab.lookup vt xi)) 
272 
 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.*) 
23519  283 
fun clause_of_strees ctxt vt0 ts = 
22728  284 
let val (vt, dt) = lits_of_strees ctxt (vt0,[]) ts in 
24680  285 
singleton (Syntax.check_terms ctxt) (TypeInfer.constrain HOLogic.boolT (fix_sorts vt dt)) 
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end 
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29268  288 
fun gen_all_vars t = fold_rev Logic.all (OldTerm.term_vars t) t; 
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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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end 
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(** Global sort constraints on TFrees (from tfree_tcs) are positive unit clauses. **) 
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296 

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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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299 

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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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handle STREE _ => (*not a positive type constraint: ignore*) 
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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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307 

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(**** Translation of TSTP files to Isar Proofs ****) 
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309 

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fun decode_proof_steps ctxt tuples = 
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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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end 
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23519  315 
(** Finding a matching assumption. The literals may be permuted, and variable names 
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may disagree. We must try all combinations of literals (quadratic!) and 
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match the variable names consistently. **) 
23519  318 

35865  319 
fun strip_alls_aux n (Const(@{const_name all}, _)$Abs(a,T,t)) = 
23519  320 
strip_alls_aux (n+1) (subst_bound (Var ((a,n), T), t)) 
321 
 strip_alls_aux _ t = t; 

322 

323 
val strip_alls = strip_alls_aux 0; 

324 

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exception MATCH_LITERAL of unit 
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(* Remark 1: Ignore types. They are not to be trusted. 
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Remark 2: Ignore order of arguments for equality. SPASS sometimes swaps 
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them for no apparent reason. *) 
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fun match_literal (Const (@{const_name "op ="}, _) $ t1 $ u1) 
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(Const (@{const_name "op ="}, _) $ t2 $ u2) env = 
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(env > match_literal t1 t2 > match_literal u1 u2 
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handle MATCH_LITERAL () => 
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env > match_literal t1 u2 > match_literal u1 t2) 
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 match_literal (t1 $ u1) (t2 $ u2) env = 
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env > match_literal t1 t2 > match_literal u1 u2 
31038  337 
 match_literal (Abs (_,_,t1)) (Abs (_,_,t2)) env = 
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match_literal t1 t2 env 
31038  339 
 match_literal (Bound i1) (Bound i2) env = 
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if i1=i2 then env else raise MATCH_LITERAL () 
31038  341 
 match_literal (Const(a1,_)) (Const(a2,_)) env = 
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if a1=a2 then env else raise MATCH_LITERAL () 
31038  343 
 match_literal (Free(a1,_)) (Free(a2,_)) env = 
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if a1=a2 then env else raise MATCH_LITERAL () 
23519  345 
 match_literal (Var(ix1,_)) (Var(ix2,_)) env = insert (op =) (ix1,ix2) env 
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 match_literal _ _ _ = raise MATCH_LITERAL () 
23519  347 

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(* Checking that all variable associations are unique. The list "env" contains 
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no repetitions, but does it contain say (x, y) and (y, y)? *) 
31038  350 
fun good env = 
23519  351 
let val (xs,ys) = ListPair.unzip env 
352 
in not (has_duplicates (op=) xs orelse has_duplicates (op=) ys) end; 

353 

354 
(*Match one list of literals against another, ignoring types and the order of 

355 
literals. Sorting is unreliable because we don't have types or variable names.*) 

356 
fun matches_aux _ [] [] = true 

357 
 matches_aux env (lit::lits) ts = 

358 
let fun match1 us [] = false 

359 
 match1 us (t::ts) = 

360 
let val env' = match_literal lit t env 

31038  361 
in (good env' andalso matches_aux env' lits (us@ts)) orelse 
362 
match1 (t::us) ts 

23519  363 
end 
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handle MATCH_LITERAL () => match1 (t::us) ts 
31038  365 
in match1 [] ts end; 
23519  366 

367 
(*Is this length test useful?*) 

31038  368 
fun matches (lits1,lits2) = 
369 
length lits1 = length lits2 andalso 

23519  370 
matches_aux [] (map Envir.eta_contract lits1) (map Envir.eta_contract lits2); 
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371 

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fun permuted_clause t = 
24958  373 
let val lits = HOLogic.disjuncts t 
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fun perm [] = NONE 
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 perm (ctm::ctms) = 
24958  376 
if matches (lits, HOLogic.disjuncts (HOLogic.dest_Trueprop (strip_alls ctm))) 
23519  377 
then SOME ctm else perm ctms 
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in perm end; 
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379 

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(*ctms is a list of conjecture clauses as yielded by Isabelle. Those returned by the 
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ATP may have their literals reordered.*) 
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fun isar_proof_body ctxt sorts ctms = 
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383 
let 
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384 
val _ = trace_proof_msg (K "\n\nisar_proof_body: start\n") 
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385 
val string_of_term = 
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386 
PrintMode.setmp (filter (curry (op =) Symbol.xsymbolsN) 
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387 
(print_mode_value ())) 
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388 
(Syntax.string_of_term ctxt) 
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fun have_or_show "show" _ = " show \"" 
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390 
 have_or_show have lname = " " ^ have ^ " " ^ lname ^ ": \"" 
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fun do_line _ (lname, t, []) = 
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(* No depedencies: it's a conjecture clause, with no proof. *) 
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393 
(case permuted_clause t ctms of 
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394 
SOME u => " assume " ^ lname ^ ": \"" ^ string_of_term u ^ "\"\n" 
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395 
 NONE => raise TERM ("Sledgehammer_Proof_Reconstruct.isar_proof_body", 
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396 
[t])) 
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397 
 do_line have (lname, t, deps) = 
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398 
have_or_show have lname ^ 
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399 
string_of_term (gen_all_vars (HOLogic.mk_Trueprop t)) ^ 
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400 
"\"\n by (metis " ^ space_implode " " deps ^ ")\n" 
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401 
fun do_lines [(lname, t, deps)] = [do_line "show" (lname, t, deps)] 
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402 
 do_lines ((lname, t, deps) :: lines) = 
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403 
do_line "have" (lname, t, deps) :: do_lines lines 
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404 
in setmp_CRITICAL show_sorts sorts do_lines end; 
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405 

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fun unequal t (_, t', _) = not (t aconv t'); 
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407 

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408 
(*No "real" literals means only type information*) 
23519  409 
fun eq_types t = t aconv HOLogic.true_const; 
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410 

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411 
fun replace_dep (old:int, new) dep = if dep=old then new else [dep]; 
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412 

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413 
fun replace_deps (old:int, new) (lno, t, deps) = 
33042  414 
(lno, t, List.foldl (uncurry (union (op =))) [] (map (replace_dep (old, new)) deps)); 
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415 

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416 
(*Discard axioms; consolidate adjacent lines that prove the same clause, since they differ 
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417 
only in type information.*) 
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418 
fun add_proof_line thm_names (lno, t, []) lines = 
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419 
(* No dependencies: axiom or conjecture clause *) 
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420 
if is_axiom thm_names lno then 
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421 
(* Axioms are not proof lines *) 
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422 
if eq_types t then 
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423 
(* Must be clsrel/clsarity: type information, so delete refs to it *) 
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424 
map (replace_deps (lno, [])) lines 
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425 
else 
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426 
(case take_prefix (unequal t) lines of 
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427 
(_,[]) => lines (*no repetition of proof line*) 
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428 
 (pre, (lno', _, _) :: post) => (*repetition: replace later line by earlier one*) 
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429 
pre @ map (replace_deps (lno', [lno])) post) 
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430 
else 
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431 
(lno, t, []) :: lines 
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432 
 add_proof_line _ (lno, t, deps) lines = 
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433 
if eq_types t then (lno, t, deps) :: lines 
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changeset

434 
(*Type information will be deleted later; skip repetition test.*) 
535fbed859da
Numerous bug fixes. Type clauses distinguished from empty clauses. Working proof reduction.
paulson
parents:
22470
diff
changeset

435 
else (*FIXME: Doesn't this code risk conflating proofs involving different types??*) 
35869
cac366550624
start work on direct proof reconstruction for Sledgehammer
blanchet
parents:
35868
diff
changeset

436 
case take_prefix (unequal t) lines of 
22044
6c0702a96076
More compact proof reconstruction: lines having fewer than !min_deps dependences are folded
paulson
parents:
22012
diff
changeset

437 
(_,[]) => (lno, t, deps) :: lines (*no repetition of proof line*) 
32994  438 
 (pre, (lno', t', _) :: post) => 
22044
6c0702a96076
More compact proof reconstruction: lines having fewer than !min_deps dependences are folded
paulson
parents:
22012
diff
changeset

439 
(lno, t', deps) :: (*repetition: replace later line by earlier one*) 
6c0702a96076
More compact proof reconstruction: lines having fewer than !min_deps dependences are folded
paulson
parents:
22012
diff
changeset

440 
(pre @ map (replace_deps (lno', [lno])) post); 
6c0702a96076
More compact proof reconstruction: lines having fewer than !min_deps dependences are folded
paulson
parents:
22012
diff
changeset

441 

22470
0d52e5157124
No label on "show"; tries to remove dependencies more cleanly
paulson
parents:
22428
diff
changeset

442 
(*Recursively delete empty lines (type information) from the proof.*) 
0d52e5157124
No label on "show"; tries to remove dependencies more cleanly
paulson
parents:
22428
diff
changeset

443 
fun add_nonnull_prfline ((lno, t, []), lines) = (*no dependencies, so a conjecture clause*) 
22491
535fbed859da
Numerous bug fixes. Type clauses distinguished from empty clauses. Working proof reduction.
paulson
parents:
22470
diff
changeset

444 
if eq_types t (*must be type information, tfree_tcs, clsrel, clsarity: delete refs to it*) 
23139
aa899bce7c3b
TextIO.inputLine: use present SML B library version;
wenzelm
parents:
23083
diff
changeset

445 
then delete_dep lno lines 
aa899bce7c3b
TextIO.inputLine: use present SML B library version;
wenzelm
parents:
23083
diff
changeset

446 
else (lno, t, []) :: lines 
22470
0d52e5157124
No label on "show"; tries to remove dependencies more cleanly
paulson
parents:
22428
diff
changeset

447 
 add_nonnull_prfline ((lno, t, deps), lines) = (lno, t, deps) :: lines 
30190  448 
and delete_dep lno lines = List.foldr add_nonnull_prfline [] (map (replace_deps (lno, [])) lines); 
22470
0d52e5157124
No label on "show"; tries to remove dependencies more cleanly
paulson
parents:
22428
diff
changeset

449 

35865  450 
fun bad_free (Free (a,_)) = String.isPrefix skolem_prefix a 
22731
abfdccaed085
trying to make singlestep proofs work better, especially if they contain
paulson
parents:
22728
diff
changeset

451 
 bad_free _ = false; 
abfdccaed085
trying to make singlestep proofs work better, especially if they contain
paulson
parents:
22728
diff
changeset

452 

23139
aa899bce7c3b
TextIO.inputLine: use present SML B library version;
wenzelm
parents:
23083
diff
changeset

453 
(*TVars are forbidden in goals. Also, we don't want lines with <2 dependencies. 
22491
535fbed859da
Numerous bug fixes. Type clauses distinguished from empty clauses. Working proof reduction.
paulson
parents:
22470
diff
changeset

454 
To further compress proofs, setting modulus:=n deletes every nth line, and nlines 
535fbed859da
Numerous bug fixes. Type clauses distinguished from empty clauses. Working proof reduction.
paulson
parents:
22470
diff
changeset

455 
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

456 
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

457 
phase may delete some dependencies, hence this phase comes later.*) 
36064
48aec67c284f
added "modulus" and "sorts" options to control Sledgehammer's Isar proof output
blanchet
parents:
36063
diff
changeset

458 
fun add_wanted_prfline ctxt _ ((lno, t, []), (nlines, lines)) = 
22491
535fbed859da
Numerous bug fixes. Type clauses distinguished from empty clauses. Working proof reduction.
paulson
parents:
22470
diff
changeset

459 
(nlines, (lno, t, []) :: lines) (*conjecture clauses must be kept*) 
36064
48aec67c284f
added "modulus" and "sorts" options to control Sledgehammer's Isar proof output
blanchet
parents:
36063
diff
changeset

460 
 add_wanted_prfline ctxt modulus ((lno, t, deps), (nlines, lines)) = 
29272  461 
if eq_types t orelse not (null (Term.add_tvars t [])) orelse 
29268  462 
exists_subterm bad_free t orelse 
24937
340523598914
contextbased treatment of generalization; also handling TFrees in axiom clauses
paulson
parents:
24920
diff
changeset

463 
(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

464 
(length deps < 2 orelse nlines mod modulus <> 0)) 
22491
535fbed859da
Numerous bug fixes. Type clauses distinguished from empty clauses. Working proof reduction.
paulson
parents:
22470
diff
changeset

465 
then (nlines+1, map (replace_deps (lno, deps)) lines) (*Delete line*) 
535fbed859da
Numerous bug fixes. Type clauses distinguished from empty clauses. Working proof reduction.
paulson
parents:
22470
diff
changeset

466 
else (nlines+1, (lno, t, deps) :: lines); 
21978
72c21698a055
Contains old Tools/ATP/AtpCommunication.ML, plus proof reconstruction
paulson
parents:
diff
changeset

467 

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

468 
(*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

469 
fun stringify_deps thm_names deps_map [] = [] 
72c21698a055
Contains old Tools/ATP/AtpCommunication.ML, plus proof reconstruction
paulson
parents:
diff
changeset

470 
 stringify_deps thm_names deps_map ((lno, t, deps) :: lines) = 
36291
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

471 
if is_axiom thm_names lno then 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

472 
(Vector.sub(thm_names,lno1), t, []) :: stringify_deps thm_names deps_map lines 
21979
80e10f181c46
Improvements to proof reconstruction. Now "fixes" is inserted
paulson
parents:
21978
diff
changeset

473 
else let val lname = Int.toString (length deps_map) 
36291
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

474 
fun fix lno = if is_axiom thm_names lno 
21978
72c21698a055
Contains old Tools/ATP/AtpCommunication.ML, plus proof reconstruction
paulson
parents:
diff
changeset

475 
then SOME(Vector.sub(thm_names,lno1)) 
36291
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

476 
else AList.lookup (op =) deps_map lno; 
32952  477 
in (lname, t, map_filter fix (distinct (op=) deps)) :: 
21978
72c21698a055
Contains old Tools/ATP/AtpCommunication.ML, plus proof reconstruction
paulson
parents:
diff
changeset

478 
stringify_deps thm_names ((lno,lname)::deps_map) lines 
72c21698a055
Contains old Tools/ATP/AtpCommunication.ML, plus proof reconstruction
paulson
parents:
diff
changeset

479 
end; 
72c21698a055
Contains old Tools/ATP/AtpCommunication.ML, plus proof reconstruction
paulson
parents:
diff
changeset

480 

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

481 
fun isar_proof_start i = 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

482 
(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

483 
"proof (neg_clausify)\n"; 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

484 
fun isar_fixes [] = "" 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

485 
 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

486 
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

487 
 isar_proof_end _ = "next" 
21979
80e10f181c46
Improvements to proof reconstruction. Now "fixes" is inserted
paulson
parents:
21978
diff
changeset

488 

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

489 
fun isar_proof_from_atp_proof cnfs modulus sorts ctxt goal i thm_names = 
35868
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

490 
let 
36291
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

491 
val _ = trace_proof_msg (K "\nisar_proof_from_atp_proof: start\n") 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

492 
val tuples = map (parse_proof_line o explode) cnfs 
35868
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

493 
val _ = trace_proof_msg (fn () => 
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

494 
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

495 
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

496 
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

497 
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

498 
val _ = trace_proof_msg (fn () => 
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

499 
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

500 
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

501 
val _ = trace_proof_msg (fn () => 
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

502 
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

503 
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

504 
val _ = trace_proof_msg (fn () => 
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

505 
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

506 
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

507 
val _ = trace_proof_msg (fn () => 
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

508 
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

509 
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

510 
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

511 
(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

512 
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

513 
(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

514 
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

515 
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

516 
in 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

517 
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

518 
isar_proof_end n ^ "\n" 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

519 
end 
36288  520 
handle STREE _ => raise Fail "Cannot parse ATP output"; 
21978
72c21698a055
Contains old Tools/ATP/AtpCommunication.ML, plus proof reconstruction
paulson
parents:
diff
changeset

521 

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

522 

33310  523 
(* === EXTRACTING LEMMAS === *) 
36223
217ca1273786
make Sledgehammer's minimizer also minimize Isar proofs
blanchet
parents:
36140
diff
changeset

524 
(* A list consisting of the first number in each line is returned. 
217ca1273786
make Sledgehammer's minimizer also minimize Isar proofs
blanchet
parents:
36140
diff
changeset

525 
TPTP: Interesting lines have the form "cnf(108, axiom, ...)", where the 
217ca1273786
make Sledgehammer's minimizer also minimize Isar proofs
blanchet
parents:
36140
diff
changeset

526 
number (108) is extracted. 
217ca1273786
make Sledgehammer's minimizer also minimize Isar proofs
blanchet
parents:
36140
diff
changeset

527 
DFG: Lines have the form "108[0:Inp] ...", where the first number (108) is 
217ca1273786
make Sledgehammer's minimizer also minimize Isar proofs
blanchet
parents:
36140
diff
changeset

528 
extracted. *) 
36369
d2cd0d04b8e6
handle ATP proof delimiters in a cleaner, more extensible fashion
blanchet
parents:
36293
diff
changeset

529 
fun get_step_nums proof = 
35865  530 
let 
36291
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

531 
val toks = String.tokens (not o is_ident_char) 
35865  532 
fun inputno ("cnf" :: ntok :: "axiom" :: _) = Int.fromString ntok 
36291
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

533 
 inputno ("cnf" :: ntok :: "negated_conjecture" :: _) = 
35865  534 
Int.fromString ntok 
36369
d2cd0d04b8e6
handle ATP proof delimiters in a cleaner, more extensible fashion
blanchet
parents:
36293
diff
changeset

535 
 inputno (ntok :: "0" :: "Inp" :: _) = 
d2cd0d04b8e6
handle ATP proof delimiters in a cleaner, more extensible fashion
blanchet
parents:
36293
diff
changeset

536 
Int.fromString ntok (* SPASS's output format *) 
35865  537 
 inputno _ = NONE 
36369
d2cd0d04b8e6
handle ATP proof delimiters in a cleaner, more extensible fashion
blanchet
parents:
36293
diff
changeset

538 
in map_filter (inputno o toks) (split_lines proof) end 
33310  539 

540 
(*Used to label theorems chained into the sledgehammer call*) 

541 
val chained_hint = "CHAINED"; 

35865  542 
val kill_chained = filter_out (curry (op =) chained_hint) 
543 

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

544 
fun apply_command _ 1 = "by " 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

545 
 apply_command 1 _ = "apply " 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

546 
 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

547 
fun metis_command i n [] = 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

548 
apply_command i n ^ "metis" 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

549 
 metis_command i n xs = 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

550 
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

551 
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

552 
"Try this command: " ^ 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

553 
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

554 
fun minimize_line _ [] = "" 
dbbf4d5d584d
pass relevant options from "sledgehammer" to "sledgehammer minimize";
blanchet
parents:
36231
diff
changeset

555 
 minimize_line minimize_command facts = 
dbbf4d5d584d
pass relevant options from "sledgehammer" to "sledgehammer minimize";
blanchet
parents:
36231
diff
changeset

556 
case minimize_command facts of 
dbbf4d5d584d
pass relevant options from "sledgehammer" to "sledgehammer minimize";
blanchet
parents:
36231
diff
changeset

557 
"" => "" 
dbbf4d5d584d
pass relevant options from "sledgehammer" to "sledgehammer minimize";
blanchet
parents:
36231
diff
changeset

558 
 command => 
36065  559 
"To minimize the number of lemmas, try this command: " ^ 
36281
dbbf4d5d584d
pass relevant options from "sledgehammer" to "sledgehammer minimize";
blanchet
parents:
36231
diff
changeset

560 
Markup.markup Markup.sendback command ^ ".\n" 
31840
beeaa1ed1f47
check if conjectures have been used in proof
immler@in.tum.de
parents:
31479
diff
changeset

561 

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

562 
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

563 
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

564 
val lemmas = 
36369
d2cd0d04b8e6
handle ATP proof delimiters in a cleaner, more extensible fashion
blanchet
parents:
36293
diff
changeset

565 
proof > get_step_nums 
36291
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

566 
> filter (is_axiom 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

567 
> map (fn i => Vector.sub (thm_names, i  1)) 
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

568 
> filter (fn x => x <> "??.unknown") 
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

569 
> sort_distinct string_ord 
36063
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

570 
val n = Logic.count_prems (prop_of goal) 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

571 
val xs = kill_chained lemmas 
cdc6855a6387
make Sledgehammer output "by" vs. "apply", "qed" vs. "next", and any necessary "prefer"
blanchet
parents:
36001
diff
changeset

572 
in 
36281
dbbf4d5d584d
pass relevant options from "sledgehammer" to "sledgehammer minimize";
blanchet
parents:
36231
diff
changeset

573 
(metis_line i n xs ^ minimize_line minimize_command xs, kill_chained lemmas) 
36223
217ca1273786
make Sledgehammer's minimizer also minimize Isar proofs
blanchet
parents:
36140
diff
changeset

574 
end 
31037
ac8669134e7a
added Philipp Meyer's implementation of AtpMinimal
immler@in.tum.de
parents:
30874
diff
changeset

575 

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

576 
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

577 

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

578 
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

579 

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

580 
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

581 
 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

582 
 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

583 
 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

584 
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

585 
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

586 
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

587 
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

588 
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

589 
else 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

590 
str c1 ^ 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

591 
(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

592 
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

593 
else 
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

594 
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

595 

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

596 
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

597 

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

598 
fun isar_proof_text debug modulus sorts ctxt 
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

599 
(minimize_command, proof, thm_names, goal, i) = 
33310  600 
let 
36369
d2cd0d04b8e6
handle ATP proof delimiters in a cleaner, more extensible fashion
blanchet
parents:
36293
diff
changeset

601 
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

602 
val (one_line_proof, lemma_names) = 
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

603 
metis_proof_text (minimize_command, proof, thm_names, goal, i) 
35868
491a97039ce1
renamed "e_full" and "vampire_full" to "e_isar" and "vampire_isar";
blanchet
parents:
35865
diff
changeset

604 
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
blanchet
parents:
36281
diff
changeset

605 
fun isar_proof_for () = 
36291
b4c2043cc96c
added Isar proof reconstruction support for SPASS  which means all provers can now yield Isar proofs;
blanchet
parents:
36288
diff
changeset

606 
case isar_proof_from_atp_proof cnfs modulus sorts ctxt goal i thm_names of 
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

607 
"" => "" 
36285
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

608 
 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

609 
"\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

610 
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

611 
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

612 
"" 
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

613 
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

614 
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:
36281
diff
changeset

615 
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:
36281
diff
changeset

616 
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:
36285
diff
changeset

617 
> 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

618 
in (one_line_proof ^ isar_proof, lemma_names) end 
21978
72c21698a055
Contains old Tools/ATP/AtpCommunication.ML, plus proof reconstruction
paulson
parents:
diff
changeset

619 

36288  620 
fun proof_text isar_proof debug modulus sorts ctxt = 
621 
if isar_proof then isar_proof_text debug modulus sorts ctxt 

622 
else metis_proof_text 

36223
217ca1273786
make Sledgehammer's minimizer also minimize Isar proofs
blanchet
parents:
36140
diff
changeset

623 

31038  624 
end; 