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(* Title: HOL/Tools/ATP/atp_proof.ML
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Author: Lawrence C. Paulson, Cambridge University Computer Laboratory
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Author: Claire Quigley, Cambridge University Computer Laboratory
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Author: Jasmin Blanchette, TU Muenchen
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Abstract representation of ATP proofs and TSTP/SPASS syntax.
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*)
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signature ATP_PROOF =
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sig
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type ('a, 'b) ho_term = ('a, 'b) ATP_Problem.ho_term
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type ('a, 'b, 'c) formula = ('a, 'b, 'c) ATP_Problem.formula
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type 'a problem = 'a ATP_Problem.problem
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exception UNRECOGNIZED_ATP_PROOF of unit
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datatype failure =
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Unprovable |
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GaveUp |
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ProofMissing |
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ProofIncomplete |
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UnsoundProof of bool option * string list | (* FIXME: doesn't belong here *)
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CantConnect |
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TimedOut |
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Inappropriate |
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OutOfResources |
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SpassTooOld |
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VampireTooOld |
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NoPerl |
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NoLibwwwPerl |
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MalformedInput |
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MalformedOutput |
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Interrupted |
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Crashed |
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InternalError |
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UnknownError of string
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type step_name = string * string list option
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datatype 'a step =
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Definition of step_name * 'a * 'a |
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Inference of step_name * 'a * step_name list
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type 'a proof = ('a, 'a, ('a, 'a) ho_term) formula step list
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val short_output : bool -> string -> string
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val string_for_failure : failure -> string
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val extract_important_message : string -> string
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val extract_known_failure :
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(failure * string) list -> string -> failure option
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val extract_tstplike_proof_and_outcome :
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bool -> bool -> (string * string) list -> (failure * string) list -> string
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-> string * failure option
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val is_same_atp_step : step_name -> step_name -> bool
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val scan_general_id : string list -> string * string list
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val parse_formula :
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string list -> (string, 'a, (string, 'a) ho_term) formula * string list
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val atp_proof_from_tstplike_proof :
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string problem -> string -> string -> string proof
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val clean_up_atp_proof_dependencies : string proof -> string proof
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val map_term_names_in_atp_proof :
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(string -> string) -> string proof -> string proof
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val nasty_atp_proof : string Symtab.table -> string proof -> string proof
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end;
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structure ATP_Proof : ATP_PROOF =
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struct
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open ATP_Util
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open ATP_Problem
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exception UNRECOGNIZED_ATP_PROOF of unit
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datatype failure =
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Unprovable |
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GaveUp |
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ProofMissing |
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ProofIncomplete |
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UnsoundProof of bool option * string list |
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CantConnect |
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TimedOut |
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Inappropriate |
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OutOfResources |
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SpassTooOld |
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VampireTooOld |
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NoPerl |
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NoLibwwwPerl |
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MalformedInput |
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MalformedOutput |
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Interrupted |
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Crashed |
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InternalError |
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UnknownError of string
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fun is_ident_char c = Char.isAlphaNum c orelse c = #"_"
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val strip_spaces_except_between_ident_chars = strip_spaces true is_ident_char
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fun elide_string threshold s =
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if size s > threshold then
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String.extract (s, 0, SOME (threshold div 2 - 5)) ^ " ...... " ^
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String.extract (s, size s - (threshold + 1) div 2 + 6, NONE)
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else
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s
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fun short_output verbose output =
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if verbose then
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if output = "" then "No details available" else elide_string 1000 output
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else
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""
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val missing_message_tail =
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" appears to be missing. You will need to install it if you want to invoke \
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\remote provers."
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fun involving [] = ""
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| involving ss =
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"involving " ^ space_implode " " (Try.serial_commas "and" (map quote ss)) ^
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" "
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fun string_for_failure Unprovable = "The problem is unprovable."
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| string_for_failure GaveUp = "The prover gave up."
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| string_for_failure ProofMissing =
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"The prover claims the conjecture is a theorem but did not provide a proof."
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| string_for_failure ProofIncomplete =
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"The prover claims the conjecture is a theorem but provided an incomplete \
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\proof."
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| string_for_failure (UnsoundProof (NONE, ss)) =
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"The prover found a type-unsound proof " ^ involving ss ^
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"(or, less likely, your axioms are inconsistent). Specify a sound type \
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\encoding or omit the \"type_enc\" option."
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| string_for_failure (UnsoundProof (SOME false, ss)) =
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"The prover found a type-unsound proof " ^ involving ss ^
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"(or, less likely, your axioms are inconsistent). Try passing the \
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\\"sound\" option to Sledgehammer to avoid such spurious proofs."
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| string_for_failure (UnsoundProof (SOME true, ss)) =
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"The prover found a type-unsound proof " ^ involving ss ^
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"even though a supposedly type-sound encoding was used (or, less likely, \
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\your axioms are inconsistent). Please report this to the Isabelle \
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\developers."
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| string_for_failure CantConnect = "Cannot connect to remote server."
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| string_for_failure TimedOut = "Timed out."
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| string_for_failure Inappropriate =
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"The problem lies outside the prover's scope."
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| string_for_failure OutOfResources = "The prover ran out of resources."
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| string_for_failure SpassTooOld =
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"Isabelle requires a more recent version of SPASS with support for the \
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\TPTP syntax. To install it, download and extract the package \
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\\"http://isabelle.in.tum.de/dist/contrib/spass-3.7.tar.gz\" and add the \
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\\"spass-3.7\" directory's absolute path to " ^
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Path.print (Path.expand (Path.explode "$ISABELLE_HOME_USER/etc/components")) ^
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" on a line of its own."
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| string_for_failure VampireTooOld =
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"Isabelle requires a more recent version of Vampire. To install it, follow \
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\the instructions from the Sledgehammer manual (\"isabelle doc\
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\ sledgehammer\")."
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| string_for_failure NoPerl = "Perl" ^ missing_message_tail
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| string_for_failure NoLibwwwPerl =
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"The Perl module \"libwww-perl\"" ^ missing_message_tail
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| string_for_failure MalformedInput =
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"The generated problem is malformed. Please report this to the Isabelle \
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\developers."
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| string_for_failure MalformedOutput = "The prover output is malformed."
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| string_for_failure Interrupted = "The prover was interrupted."
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| string_for_failure Crashed = "The prover crashed."
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| string_for_failure InternalError = "An internal prover error occurred."
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| string_for_failure (UnknownError string) =
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"A prover error occurred" ^
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(if string = "" then ". (Pass the \"verbose\" option for details.)"
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else ":\n" ^ string)
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fun extract_delimited (begin_delim, end_delim) output =
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output |> first_field begin_delim |> the |> snd
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|> first_field end_delim |> the |> fst
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|> first_field "\n" |> the |> snd
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handle Option.Option => ""
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val tstp_important_message_delims =
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("% SZS start RequiredInformation", "% SZS end RequiredInformation")
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fun extract_important_message output =
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case extract_delimited tstp_important_message_delims output of
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"" => ""
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| s => s |> space_explode "\n" |> filter_out (curry (op =) "")
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|> map (perhaps (try (unprefix "%")))
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|> map (perhaps (try (unprefix " ")))
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|> space_implode "\n " |> quote
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(* Splits by the first possible of a list of delimiters. *)
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fun extract_tstplike_proof delims output =
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case pairself (find_first (fn s => String.isSubstring s output))
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(ListPair.unzip delims) of
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(SOME begin_delim, SOME end_delim) =>
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extract_delimited (begin_delim, end_delim) output
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| _ => ""
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fun extract_known_failure known_failures output =
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known_failures
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|> find_first (fn (_, pattern) => String.isSubstring pattern output)
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|> Option.map fst
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fun extract_tstplike_proof_and_outcome verbose complete proof_delims
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known_failures output =
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case (extract_tstplike_proof proof_delims output,
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extract_known_failure known_failures output) of
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(_, SOME ProofIncomplete) => ("", SOME ProofIncomplete)
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| ("", SOME ProofMissing) => ("", NONE)
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| ("", SOME failure) =>
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("", SOME (if failure = GaveUp andalso complete then Unprovable
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else failure))
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| ("", NONE) => ("", SOME (UnknownError (short_output verbose output)))
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| (tstplike_proof, _) => (tstplike_proof, NONE)
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type step_name = string * string list option
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fun is_same_atp_step (s1, _) (s2, _) = s1 = s2
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val vampire_fact_prefix = "f"
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fun step_name_ord p =
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let val q = pairself fst p in
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(* The "unprefix" part is to cope with remote Vampire's output. The proper
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solution would be to perform a topological sort, e.g. using the nice
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"Graph" functor. *)
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case pairself (Int.fromString
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o perhaps (try (unprefix vampire_fact_prefix))) q of
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(NONE, NONE) => string_ord q
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| (NONE, SOME _) => LESS
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| (SOME _, NONE) => GREATER
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| (SOME i, SOME j) => int_ord (i, j)
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end
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datatype 'a step =
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Definition of step_name * 'a * 'a |
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Inference of step_name * 'a * step_name list
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nik@44537
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type 'a proof = ('a, 'a, ('a, 'a) ho_term) formula step list
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fun step_name (Definition (name, _, _)) = name
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| step_name (Inference (name, _, _)) = name
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(**** PARSING OF TSTP FORMAT ****)
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(* FIXME: temporary hack *)
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fun repair_waldmeister_step_name s =
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case space_explode "." s of
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[a, b, c, d] =>
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(case a of "0" => "X" | "1" => "Y" | _ => "Z" ^ a) ^
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blanchet@43814
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(if size b = 1 then "0" else "") ^ b ^ c ^ d
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| _ => s
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(* Strings enclosed in single quotes (e.g., file names) *)
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val scan_general_id =
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$$ "'" |-- Scan.repeat (~$$ "'") --| $$ "'"
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blanchet@43814
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>> implode >> repair_waldmeister_step_name
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|| Scan.repeat ($$ "$") -- Scan.many1 Symbol.is_letdig
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>> (fn (ss1, ss2) => implode ss1 ^ implode ss2)
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(* Generalized first-order terms, which include file names, numbers, etc. *)
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blanchet@43465
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fun parse_annotation x =
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((scan_general_id ::: Scan.repeat ($$ " " |-- scan_general_id))
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-- Scan.optional parse_annotation [] >> op @
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|| $$ "(" |-- parse_annotations --| $$ ")"
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blanchet@43465
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|| $$ "[" |-- parse_annotations --| $$ "]") x
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blanchet@43465
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and parse_annotations x =
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blanchet@43465
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(Scan.optional (parse_annotation
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::: Scan.repeat ($$ "," |-- parse_annotation)) []
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>> flat) x
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fun list_app (f, args) =
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fold (fn arg => fn f => ATerm (tptp_app, [f, arg])) args f
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blanchet@43809
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(* We ignore TFF and THF types for now. *)
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blanchet@43809
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fun parse_type_stuff x =
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blanchet@43809
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Scan.repeat (($$ tptp_has_type || $$ tptp_fun_type) |-- parse_arg) x
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blanchet@43809
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and parse_arg x =
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blanchet@43809
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($$ "(" |-- parse_term --| $$ ")" --| parse_type_stuff
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blanchet@43809
|
276 |
|| scan_general_id --| parse_type_stuff
|
blanchet@43809
|
277 |
-- Scan.optional ($$ "(" |-- parse_terms --| $$ ")") []
|
blanchet@43809
|
278 |
>> ATerm) x
|
blanchet@43807
|
279 |
and parse_app x =
|
blanchet@43809
|
280 |
(parse_arg -- Scan.repeat ($$ tptp_app |-- parse_arg) >> list_app) x
|
blanchet@43807
|
281 |
and parse_term x =
|
blanchet@43809
|
282 |
(parse_app -- Scan.option (Scan.option ($$ tptp_not_infix) --| $$ tptp_equal
|
blanchet@43809
|
283 |
-- parse_app)
|
blanchet@43809
|
284 |
>> (fn (u1, NONE) => u1
|
blanchet@43809
|
285 |
| (u1, SOME (NONE, u2)) => ATerm ("equal", [u1, u2])
|
blanchet@43809
|
286 |
| (u1, SOME (SOME _, u2)) =>
|
blanchet@43809
|
287 |
ATerm (tptp_not, [ATerm ("equal", [u1, u2])]))) x
|
blanchet@43807
|
288 |
and parse_terms x =
|
blanchet@43807
|
289 |
(parse_term ::: Scan.repeat ($$ "," |-- parse_term)) x
|
blanchet@39692
|
290 |
|
blanchet@43809
|
291 |
(* TODO: Avoid duplication with "parse_term" above. *)
|
blanchet@39822
|
292 |
fun parse_atom x =
|
blanchet@43809
|
293 |
(parse_term -- Scan.option (Scan.option ($$ tptp_not_infix) --| $$ tptp_equal
|
blanchet@43809
|
294 |
-- parse_term)
|
blanchet@39822
|
295 |
>> (fn (u1, NONE) => AAtom u1
|
blanchet@43784
|
296 |
| (u1, SOME (NONE, u2)) => AAtom (ATerm ("equal", [u1, u2]))
|
blanchet@39822
|
297 |
| (u1, SOME (SOME _, u2)) =>
|
blanchet@43784
|
298 |
mk_anot (AAtom (ATerm ("equal", [u1, u2]))))) x
|
blanchet@39692
|
299 |
|
nik@44537
|
300 |
fun ho_term_head (ATerm (s, _)) = s
|
blanchet@39692
|
301 |
|
blanchet@39692
|
302 |
(* TPTP formulas are fully parenthesized, so we don't need to worry about
|
blanchet@39692
|
303 |
operator precedence. *)
|
blanchet@43476
|
304 |
fun parse_literal x =
|
blanchet@43809
|
305 |
((Scan.repeat ($$ tptp_not) >> length)
|
blanchet@43476
|
306 |
-- ($$ "(" |-- parse_formula --| $$ ")"
|
blanchet@43476
|
307 |
|| parse_quantified_formula
|
blanchet@43476
|
308 |
|| parse_atom)
|
blanchet@43476
|
309 |
>> (fn (n, phi) => phi |> n mod 2 = 1 ? mk_anot)) x
|
blanchet@43476
|
310 |
and parse_formula x =
|
blanchet@43476
|
311 |
(parse_literal
|
blanchet@44004
|
312 |
-- Scan.option ((Scan.this_string tptp_implies
|
blanchet@44004
|
313 |
|| Scan.this_string tptp_iff
|
blanchet@44004
|
314 |
|| Scan.this_string tptp_not_iff
|
blanchet@44004
|
315 |
|| Scan.this_string tptp_if
|
blanchet@44004
|
316 |
|| $$ tptp_or
|
blanchet@44004
|
317 |
|| $$ tptp_and) -- parse_formula)
|
blanchet@39692
|
318 |
>> (fn (phi1, NONE) => phi1
|
blanchet@44004
|
319 |
| (phi1, SOME (c, phi2)) =>
|
blanchet@44004
|
320 |
if c = tptp_implies then mk_aconn AImplies phi1 phi2
|
blanchet@44004
|
321 |
else if c = tptp_iff then mk_aconn AIff phi1 phi2
|
blanchet@44004
|
322 |
else if c = tptp_not_iff then mk_anot (mk_aconn AIff phi1 phi2)
|
blanchet@44004
|
323 |
else if c = tptp_if then mk_aconn AImplies phi2 phi1
|
blanchet@44004
|
324 |
else if c = tptp_or then mk_aconn AOr phi1 phi2
|
blanchet@44004
|
325 |
else if c = tptp_and then mk_aconn AAnd phi1 phi2
|
blanchet@44004
|
326 |
else raise Fail ("impossible connective " ^ quote c))) x
|
blanchet@43476
|
327 |
and parse_quantified_formula x =
|
blanchet@43809
|
328 |
(($$ tptp_forall >> K AForall || $$ tptp_exists >> K AExists)
|
blanchet@43476
|
329 |
--| $$ "[" -- parse_terms --| $$ "]" --| $$ ":" -- parse_literal
|
blanchet@43476
|
330 |
>> (fn ((q, ts), phi) =>
|
blanchet@43807
|
331 |
(* We ignore TFF and THF types for now. *)
|
nik@44537
|
332 |
AQuant (q, map (rpair NONE o ho_term_head) ts, phi))) x
|
blanchet@39692
|
333 |
|
blanchet@43809
|
334 |
fun skip_formula ss =
|
blanchet@43809
|
335 |
let
|
blanchet@43809
|
336 |
fun skip _ [] = []
|
blanchet@43809
|
337 |
| skip 0 (ss as "," :: _) = ss
|
blanchet@43809
|
338 |
| skip 0 (ss as ")" :: _) = ss
|
blanchet@43809
|
339 |
| skip 0 (ss as "]" :: _) = ss
|
blanchet@43809
|
340 |
| skip n ("(" :: ss) = skip (n + 1) ss
|
blanchet@43809
|
341 |
| skip n ("[" :: ss) = skip (n + 1) ss
|
blanchet@43809
|
342 |
| skip n ("]" :: ss) = skip (n - 1) ss
|
blanchet@43809
|
343 |
| skip n (")" :: ss) = skip (n - 1) ss
|
blanchet@43809
|
344 |
| skip n (_ :: ss) = skip n ss
|
blanchet@43809
|
345 |
in (AAtom (ATerm ("", [])), skip 0 ss) end
|
blanchet@43809
|
346 |
|
blanchet@39692
|
347 |
val parse_tstp_extra_arguments =
|
blanchet@43465
|
348 |
Scan.optional ($$ "," |-- parse_annotation
|
blanchet@43465
|
349 |
--| Scan.option ($$ "," |-- parse_annotations)) []
|
blanchet@39692
|
350 |
|
blanchet@41451
|
351 |
val vampire_unknown_fact = "unknown"
|
blanchet@43784
|
352 |
val waldmeister_conjecture = "conjecture_1"
|
blanchet@43784
|
353 |
|
blanchet@43407
|
354 |
val tofof_fact_prefix = "fof_"
|
blanchet@41451
|
355 |
|
blanchet@43784
|
356 |
fun is_same_term subst tm1 tm2 =
|
blanchet@43784
|
357 |
let
|
blanchet@43784
|
358 |
fun do_term_pair _ NONE = NONE
|
blanchet@43784
|
359 |
| do_term_pair (ATerm (s1, tm1), ATerm (s2, tm2)) (SOME subst) =
|
blanchet@43839
|
360 |
case pairself is_tptp_variable (s1, s2) of
|
blanchet@43784
|
361 |
(true, true) =>
|
blanchet@43784
|
362 |
(case AList.lookup (op =) subst s1 of
|
blanchet@43784
|
363 |
SOME s2' => if s2' = s2 then SOME subst else NONE
|
blanchet@43784
|
364 |
| NONE =>
|
blanchet@43784
|
365 |
if null (AList.find (op =) subst s2) then SOME ((s1, s2) :: subst)
|
blanchet@43784
|
366 |
else NONE)
|
blanchet@43784
|
367 |
| (false, false) =>
|
blanchet@43784
|
368 |
if s1 = s2 andalso length tm1 = length tm2 then
|
blanchet@43784
|
369 |
SOME subst |> fold do_term_pair (tm1 ~~ tm2)
|
blanchet@43784
|
370 |
else
|
blanchet@43784
|
371 |
NONE
|
blanchet@43784
|
372 |
| _ => NONE
|
blanchet@43784
|
373 |
in SOME subst |> do_term_pair (tm1, tm2) |> is_some end
|
blanchet@43784
|
374 |
|
blanchet@43784
|
375 |
fun is_same_formula subst (AQuant (q1, xs1, phi1)) (AQuant (q2, xs2, phi2)) =
|
blanchet@43784
|
376 |
q1 = q2 andalso length xs1 = length xs2 andalso
|
blanchet@43784
|
377 |
is_same_formula ((map fst xs1 ~~ map fst xs2) @ subst) phi1 phi2
|
blanchet@43784
|
378 |
| is_same_formula subst (AConn (c1, phis1)) (AConn (c2, phis2)) =
|
blanchet@43784
|
379 |
c1 = c2 andalso length phis1 = length phis2 andalso
|
blanchet@43784
|
380 |
forall (uncurry (is_same_formula subst)) (phis1 ~~ phis2)
|
blanchet@43784
|
381 |
| is_same_formula subst (AAtom (ATerm ("equal", [tm11, tm12]))) (AAtom tm2) =
|
blanchet@43784
|
382 |
is_same_term subst (ATerm ("equal", [tm11, tm12])) tm2 orelse
|
blanchet@43784
|
383 |
is_same_term subst (ATerm ("equal", [tm12, tm11])) tm2
|
blanchet@43784
|
384 |
| is_same_formula subst (AAtom tm1) (AAtom tm2) = is_same_term subst tm1 tm2
|
blanchet@43784
|
385 |
| is_same_formula _ _ _ = false
|
blanchet@43784
|
386 |
|
blanchet@43784
|
387 |
fun matching_formula_line_identifier phi (Formula (ident, _, phi', _, _)) =
|
blanchet@43784
|
388 |
if is_same_formula [] phi phi' then SOME ident else NONE
|
blanchet@43784
|
389 |
| matching_formula_line_identifier _ _ = NONE
|
blanchet@43784
|
390 |
|
blanchet@43784
|
391 |
fun find_formula_in_problem problem phi =
|
blanchet@43784
|
392 |
problem |> maps snd |> map_filter (matching_formula_line_identifier phi)
|
blanchet@44352
|
393 |
|> try (single o hd)
|
blanchet@43784
|
394 |
|
blanchet@43803
|
395 |
(* Syntax: (cnf|fof|tff|thf)\(<num>, <formula_role>,
|
blanchet@43803
|
396 |
<formula> <extra_arguments>\).
|
blanchet@39692
|
397 |
The <num> could be an identifier, but we assume integers. *)
|
blanchet@43784
|
398 |
fun parse_tstp_line problem =
|
blanchet@43809
|
399 |
((Scan.this_string tptp_cnf || Scan.this_string tptp_fof
|
blanchet@43809
|
400 |
|| Scan.this_string tptp_tff || Scan.this_string tptp_thf) -- $$ "(")
|
blanchet@43784
|
401 |
|-- scan_general_id --| $$ "," -- Symbol.scan_id --| $$ ","
|
blanchet@43809
|
402 |
-- (parse_formula || skip_formula) -- parse_tstp_extra_arguments --| $$ ")"
|
blanchet@43809
|
403 |
--| $$ "."
|
blanchet@43784
|
404 |
>> (fn (((num, role), phi), deps) =>
|
blanchet@43784
|
405 |
let
|
blanchet@43784
|
406 |
val (name, deps) =
|
blanchet@43784
|
407 |
(* Waldmeister isn't exactly helping. *)
|
blanchet@43784
|
408 |
case deps of
|
blanchet@43784
|
409 |
["file", _, s] =>
|
blanchet@43784
|
410 |
((num,
|
blanchet@43784
|
411 |
if s = vampire_unknown_fact then
|
blanchet@43784
|
412 |
NONE
|
blanchet@43784
|
413 |
else if s = waldmeister_conjecture then
|
blanchet@43784
|
414 |
find_formula_in_problem problem (mk_anot phi)
|
blanchet@43784
|
415 |
else
|
blanchet@44352
|
416 |
SOME [s |> perhaps (try (unprefix tofof_fact_prefix))]),
|
blanchet@43784
|
417 |
[])
|
blanchet@43784
|
418 |
| ["file", _] => ((num, find_formula_in_problem problem phi), [])
|
blanchet@43784
|
419 |
| _ => ((num, NONE), deps)
|
blanchet@43784
|
420 |
in
|
blanchet@43784
|
421 |
case role of
|
blanchet@43784
|
422 |
"definition" =>
|
blanchet@43784
|
423 |
(case phi of
|
blanchet@43784
|
424 |
AConn (AIff, [phi1 as AAtom _, phi2]) =>
|
blanchet@43784
|
425 |
Definition (name, phi1, phi2)
|
blanchet@43784
|
426 |
| AAtom (ATerm ("equal", _)) =>
|
blanchet@43784
|
427 |
(* Vampire's equality proxy axiom *)
|
blanchet@43784
|
428 |
Inference (name, phi, map (rpair NONE) deps)
|
blanchet@43809
|
429 |
| _ => raise UNRECOGNIZED_ATP_PROOF ())
|
blanchet@43784
|
430 |
| _ => Inference (name, phi, map (rpair NONE) deps)
|
blanchet@43784
|
431 |
end)
|
blanchet@39692
|
432 |
|
blanchet@39692
|
433 |
(**** PARSING OF SPASS OUTPUT ****)
|
blanchet@39692
|
434 |
|
blanchet@39692
|
435 |
(* SPASS returns clause references of the form "x.y". We ignore "y", whose role
|
blanchet@39692
|
436 |
is not clear anyway. *)
|
blanchet@39692
|
437 |
val parse_dot_name = scan_general_id --| $$ "." --| scan_general_id
|
blanchet@39692
|
438 |
|
blanchet@39692
|
439 |
val parse_spass_annotations =
|
blanchet@39692
|
440 |
Scan.optional ($$ ":" |-- Scan.repeat (parse_dot_name
|
blanchet@39692
|
441 |
--| Scan.option ($$ ","))) []
|
blanchet@39692
|
442 |
|
blanchet@39692
|
443 |
(* It is not clear why some literals are followed by sequences of stars and/or
|
blanchet@39692
|
444 |
pluses. We ignore them. *)
|
blanchet@39826
|
445 |
fun parse_decorated_atom x =
|
blanchet@39826
|
446 |
(parse_atom --| Scan.repeat ($$ "*" || $$ "+" || $$ " ")) x
|
blanchet@39692
|
447 |
|
blanchet@39692
|
448 |
fun mk_horn ([], []) = AAtom (ATerm ("c_False", []))
|
blanchet@43784
|
449 |
| mk_horn ([], pos_lits) = foldr1 (uncurry (mk_aconn AOr)) pos_lits
|
blanchet@43784
|
450 |
| mk_horn (neg_lits, []) = mk_anot (foldr1 (uncurry (mk_aconn AAnd)) neg_lits)
|
blanchet@39692
|
451 |
| mk_horn (neg_lits, pos_lits) =
|
blanchet@43784
|
452 |
mk_aconn AImplies (foldr1 (uncurry (mk_aconn AAnd)) neg_lits)
|
blanchet@43784
|
453 |
(foldr1 (uncurry (mk_aconn AOr)) pos_lits)
|
blanchet@39692
|
454 |
|
blanchet@39869
|
455 |
fun parse_horn_clause x =
|
blanchet@39869
|
456 |
(Scan.repeat parse_decorated_atom --| $$ "|" --| $$ "|"
|
blanchet@39869
|
457 |
-- Scan.repeat parse_decorated_atom --| $$ "-" --| $$ ">"
|
blanchet@39869
|
458 |
-- Scan.repeat parse_decorated_atom
|
blanchet@39869
|
459 |
>> (mk_horn o apfst (op @))) x
|
blanchet@39692
|
460 |
|
blanchet@44352
|
461 |
fun resolve_spass_num spass_names num =
|
blanchet@44352
|
462 |
case Int.fromString num of
|
blanchet@44352
|
463 |
SOME j => if j > 0 andalso j <= Vector.length spass_names then
|
blanchet@44352
|
464 |
SOME (Vector.sub (spass_names, j - 1))
|
blanchet@44352
|
465 |
else
|
blanchet@44352
|
466 |
NONE
|
blanchet@44352
|
467 |
| NONE => NONE
|
blanchet@44352
|
468 |
|
blanchet@39692
|
469 |
(* Syntax: <num>[0:<inference><annotations>]
|
blanchet@39692
|
470 |
<atoms> || <atoms> -> <atoms>. *)
|
blanchet@44352
|
471 |
fun parse_spass_line spass_names x =
|
blanchet@39869
|
472 |
(scan_general_id --| $$ "[" --| $$ "0" --| $$ ":" --| Symbol.scan_id
|
blanchet@39869
|
473 |
-- parse_spass_annotations --| $$ "]" -- parse_horn_clause --| $$ "."
|
blanchet@39869
|
474 |
>> (fn ((num, deps), u) =>
|
blanchet@44352
|
475 |
Inference ((num, resolve_spass_num spass_names num), u,
|
blanchet@44352
|
476 |
map (swap o `(resolve_spass_num spass_names)) deps))) x
|
blanchet@39692
|
477 |
|
blanchet@44352
|
478 |
fun parse_line problem spass_names =
|
blanchet@44352
|
479 |
parse_tstp_line problem || parse_spass_line spass_names
|
blanchet@44352
|
480 |
fun parse_proof problem spass_names tstp =
|
blanchet@44352
|
481 |
tstp |> strip_spaces_except_between_ident_chars
|
blanchet@44352
|
482 |
|> raw_explode
|
blanchet@44352
|
483 |
|> Scan.finite Symbol.stopper
|
blanchet@44352
|
484 |
(Scan.error (!! (fn _ => raise UNRECOGNIZED_ATP_PROOF ())
|
blanchet@44352
|
485 |
(Scan.repeat1 (parse_line problem spass_names))))
|
blanchet@44352
|
486 |
|> fst
|
blanchet@39692
|
487 |
|
blanchet@44352
|
488 |
(** SPASS's FLOTTER hack **)
|
blanchet@44352
|
489 |
|
blanchet@44352
|
490 |
(* This is a hack required for keeping track of facts after they have been
|
blanchet@44352
|
491 |
clausified by SPASS's FLOTTER preprocessor. The "ATP/scripts/spass" script is
|
blanchet@44352
|
492 |
also part of this hack. *)
|
blanchet@44352
|
493 |
|
blanchet@44352
|
494 |
val set_ClauseFormulaRelationN = "set_ClauseFormulaRelation"
|
blanchet@44352
|
495 |
|
blanchet@44352
|
496 |
fun extract_clause_sequence output =
|
blanchet@44352
|
497 |
let
|
blanchet@44352
|
498 |
val tokens_of = String.tokens (not o Char.isAlphaNum)
|
blanchet@44352
|
499 |
fun extract_num ("clause" :: (ss as _ :: _)) = Int.fromString (List.last ss)
|
blanchet@44352
|
500 |
| extract_num _ = NONE
|
blanchet@44352
|
501 |
in output |> split_lines |> map_filter (extract_num o tokens_of) end
|
blanchet@44352
|
502 |
|
blanchet@44352
|
503 |
fun is_head_digit s = Char.isDigit (String.sub (s, 0))
|
blanchet@44352
|
504 |
val scan_integer = Scan.many1 is_head_digit >> (the o Int.fromString o implode)
|
blanchet@44352
|
505 |
|
blanchet@44352
|
506 |
val parse_clause_formula_pair =
|
blanchet@44352
|
507 |
$$ "(" |-- scan_integer --| $$ ","
|
blanchet@44352
|
508 |
-- (Symbol.scan_id ::: Scan.repeat ($$ "," |-- Symbol.scan_id)) --| $$ ")"
|
blanchet@44352
|
509 |
--| Scan.option ($$ ",")
|
blanchet@44352
|
510 |
val parse_clause_formula_relation =
|
blanchet@44352
|
511 |
Scan.this_string set_ClauseFormulaRelationN |-- $$ "("
|
blanchet@44352
|
512 |
|-- Scan.repeat parse_clause_formula_pair
|
blanchet@44352
|
513 |
val extract_clause_formula_relation =
|
blanchet@44352
|
514 |
Substring.full #> Substring.position set_ClauseFormulaRelationN
|
blanchet@44352
|
515 |
#> snd #> Substring.position "." #> fst #> Substring.string
|
blanchet@44352
|
516 |
#> raw_explode #> filter_out Symbol.is_blank #> parse_clause_formula_relation
|
blanchet@44352
|
517 |
#> fst
|
blanchet@44352
|
518 |
|
blanchet@44352
|
519 |
fun extract_spass_name_vector output =
|
blanchet@44352
|
520 |
(if String.isSubstring set_ClauseFormulaRelationN output then
|
blanchet@44352
|
521 |
let
|
blanchet@44352
|
522 |
val num_seq = extract_clause_sequence output
|
blanchet@44352
|
523 |
val name_map = extract_clause_formula_relation output
|
blanchet@44352
|
524 |
val name_seq = num_seq |> map (these o AList.lookup (op =) name_map)
|
blanchet@44352
|
525 |
in name_seq end
|
blanchet@44352
|
526 |
else
|
blanchet@44352
|
527 |
[])
|
blanchet@44352
|
528 |
|> Vector.fromList
|
blanchet@44352
|
529 |
|
blanchet@44352
|
530 |
fun atp_proof_from_tstplike_proof _ _ "" = []
|
blanchet@44352
|
531 |
| atp_proof_from_tstplike_proof problem output tstp =
|
blanchet@44352
|
532 |
tstp ^ "$" (* the $ sign acts as a sentinel (FIXME: needed?) *)
|
blanchet@44352
|
533 |
|> parse_proof problem (extract_spass_name_vector output)
|
blanchet@43320
|
534 |
|> sort (step_name_ord o pairself step_name)
|
blanchet@43809
|
535 |
|
blanchet@43809
|
536 |
fun clean_up_dependencies _ [] = []
|
blanchet@43809
|
537 |
| clean_up_dependencies seen ((step as Definition (name, _, _)) :: steps) =
|
blanchet@43809
|
538 |
step :: clean_up_dependencies (name :: seen) steps
|
blanchet@43809
|
539 |
| clean_up_dependencies seen (Inference (name, u, deps) :: steps) =
|
blanchet@43809
|
540 |
Inference (name, u,
|
blanchet@43809
|
541 |
map_filter (fn dep => find_first (is_same_atp_step dep) seen)
|
blanchet@43809
|
542 |
deps) ::
|
blanchet@43809
|
543 |
clean_up_dependencies (name :: seen) steps
|
blanchet@43809
|
544 |
|
blanchet@43816
|
545 |
fun clean_up_atp_proof_dependencies proof = clean_up_dependencies [] proof
|
blanchet@39692
|
546 |
|
blanchet@39694
|
547 |
fun map_term_names_in_term f (ATerm (s, ts)) =
|
blanchet@39694
|
548 |
ATerm (f s, map (map_term_names_in_term f) ts)
|
blanchet@39694
|
549 |
fun map_term_names_in_formula f (AQuant (q, xs, phi)) =
|
blanchet@39694
|
550 |
AQuant (q, xs, map_term_names_in_formula f phi)
|
blanchet@39694
|
551 |
| map_term_names_in_formula f (AConn (c, phis)) =
|
blanchet@39694
|
552 |
AConn (c, map (map_term_names_in_formula f) phis)
|
blanchet@39694
|
553 |
| map_term_names_in_formula f (AAtom t) = AAtom (map_term_names_in_term f t)
|
blanchet@39694
|
554 |
fun map_term_names_in_step f (Definition (name, phi1, phi2)) =
|
blanchet@39694
|
555 |
Definition (name, map_term_names_in_formula f phi1,
|
blanchet@39694
|
556 |
map_term_names_in_formula f phi2)
|
blanchet@39694
|
557 |
| map_term_names_in_step f (Inference (name, phi, deps)) =
|
blanchet@39694
|
558 |
Inference (name, map_term_names_in_formula f phi, deps)
|
blanchet@39694
|
559 |
fun map_term_names_in_atp_proof f = map (map_term_names_in_step f)
|
blanchet@39694
|
560 |
|
blanchet@39694
|
561 |
fun nasty_name pool s = s |> Symtab.lookup pool |> the_default s
|
blanchet@39694
|
562 |
fun nasty_atp_proof pool =
|
blanchet@39694
|
563 |
if Symtab.is_empty pool then I
|
blanchet@39694
|
564 |
else map_term_names_in_atp_proof (nasty_name pool)
|
blanchet@39694
|
565 |
|
blanchet@39692
|
566 |
end;
|