author | blanchet |
Wed, 11 Dec 2013 22:53:32 +0800 | |
changeset 54716 | 55ed20a29a8c |
parent 54715 | a13aa1cac0e8 |
child 54746 | 6db5fbc02436 |
permissions | -rw-r--r-- |
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(* Title: HOL/Tools/Sledgehammer/sledgehammer_reconstruct.ML |
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Author: Jasmin Blanchette, TU Muenchen |
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Author: Steffen Juilf Smolka, TU Muenchen |
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Isar proof reconstruction from ATP proofs. |
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*) |
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signature SLEDGEHAMMER_RECONSTRUCT = |
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sig |
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type ('a, 'b) atp_step = ('a, 'b) ATP_Proof.atp_step |
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type 'a atp_proof = 'a ATP_Proof.atp_proof |
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type stature = ATP_Problem_Generate.stature |
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type one_line_params = Sledgehammer_Reconstructor.one_line_params |
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type isar_params = |
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bool * bool * string * string * Time.time option * real * bool * (term, string) atp_step list * |
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thm |
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val isar_proof_text : |
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Proof.context -> bool option -> isar_params -> one_line_params -> string |
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val proof_text : |
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Proof.context -> bool option -> (unit -> isar_params) -> int -> one_line_params -> string |
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end; |
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structure Sledgehammer_Reconstruct : SLEDGEHAMMER_RECONSTRUCT = |
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struct |
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open ATP_Util |
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open ATP_Problem |
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open ATP_Proof |
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open ATP_Problem_Generate |
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open ATP_Proof_Reconstruct |
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open Sledgehammer_Util |
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open Sledgehammer_Reconstructor |
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open Sledgehammer_Proof |
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open Sledgehammer_Annotate |
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open Sledgehammer_Print |
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open Sledgehammer_Preplay |
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open Sledgehammer_Compress |
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open Sledgehammer_Try0 |
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open Sledgehammer_Minimize_Isar |
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structure String_Redirect = ATP_Proof_Redirect( |
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type key = atp_step_name |
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val ord = fn ((s, _ : string list), (s', _)) => fast_string_ord (s, s') |
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val string_of = fst) |
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open String_Redirect |
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fun raw_label_of_num num = (num, 0) |
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fun label_of_clause [(num, _)] = raw_label_of_num num |
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| label_of_clause c = (space_implode "___" (map (fst o raw_label_of_num o fst) c), 0) |
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fun add_fact_of_dependencies [(_, ss as _ :: _)] = apsnd (union (op =) ss) |
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| add_fact_of_dependencies names = apfst (insert (op =) (label_of_clause names)) |
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fun replace_one_dependency (old, new) dep = |
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if is_same_atp_step dep old then new else [dep] |
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fun replace_dependencies_in_line p (name, role, t, rule, deps) = |
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(name, role, t, rule, fold (union (op =) o replace_one_dependency p) deps []) |
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(* No "real" literals means only type information (tfree_tcs, clsrel, or |
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clsarity). *) |
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fun is_only_type_information t = t aconv @{term True} |
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fun is_same_inference (role, t) (_, role', t', _, _) = |
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(t |> role = Conjecture ? s_not) aconv (t' |> role' = Conjecture ? s_not) |
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fun is_False t = t aconv @{term False} orelse t aconv @{prop False} |
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fun truncate_at_false [] = [] |
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| truncate_at_false ((line as (_, role, t, _, _)) :: lines) = |
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line :: (if role <> Conjecture andalso is_False t then [] else truncate_at_false lines) |
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(* Discard facts; consolidate adjacent lines that prove the same formula, since |
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they differ only in type information.*) |
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fun add_line (name as (_, ss), role, t, rule, []) lines = |
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(* No dependencies: lemma (for Z3), fact, conjecture, or (for Vampire) |
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internal facts or definitions. *) |
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if role = Lemma orelse role = Conjecture orelse role = Negated_Conjecture orelse |
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role = Hypothesis then |
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(name, role, t, rule, []) :: lines |
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else if role = Axiom then |
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(* Facts are not proof lines. *) |
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lines |> is_only_type_information t ? map (replace_dependencies_in_line (name, [])) |
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else |
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map (replace_dependencies_in_line (name, [])) lines |
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| add_line (line as (name, role, t, _, _)) lines = |
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(* Type information will be deleted later; skip repetition test. *) |
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if is_only_type_information t then |
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line :: lines |
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else |
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(* Is there a repetition? If so, replace later line by earlier one. *) |
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(case take_prefix (not o is_same_inference (role, t)) lines of |
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(_, []) => line :: lines |
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| (pre, (name', _, _, _, _) :: post) => |
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line :: pre @ map (replace_dependencies_in_line (name', [name])) post) |
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(* Recursively delete empty lines (type information) from the proof. *) |
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fun add_nontrivial_line (line as (name, _, t, _, [])) lines = |
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if is_only_type_information t then delete_dependency name lines else line :: lines |
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| add_nontrivial_line line lines = line :: lines |
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and delete_dependency name lines = |
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fold_rev add_nontrivial_line (map (replace_dependencies_in_line (name, [])) lines) [] |
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val e_skolemize_rule = "skolemize" |
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val vampire_skolemisation_rule = "skolemisation" |
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val is_skolemize_rule = member (op =) [e_skolemize_rule, vampire_skolemisation_rule] |
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generate "obtain" steps corresponding to skolemization inferences
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fun add_desired_lines res [] = rev res |
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| add_desired_lines res ((name as (_, ss), role, t, rule, deps) :: lines) = |
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if role <> Plain orelse is_skolemize_rule rule orelse |
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(* the last line must be kept *) |
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null lines orelse |
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(not (is_only_type_information t) andalso |
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null (Term.add_tvars t []) andalso |
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length deps >= 2 andalso |
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(* don't keep next to last line, which usually results in a trivial step *) |
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not (can the_single lines)) then |
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add_desired_lines ((name, role, t, rule, deps) :: res) lines |
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else |
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add_desired_lines res (map (replace_dependencies_in_line (name, deps)) lines) |
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val add_labels_of_proof = |
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steps_of_proof |
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#> fold_isar_steps (byline_of_step #> (fn SOME ((ls, _), _) => union (op =) ls | _ => I)) |
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fun kill_useless_labels_in_proof proof = |
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let |
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val used_ls = add_labels_of_proof proof [] |
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fun kill_label l = if member (op =) used_ls l then l else no_label |
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fun kill_assms assms = map (apfst kill_label) assms |
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fun kill_step (Prove (qs, xs, l, t, subproofs, by)) = |
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Prove (qs, xs, kill_label l, t, map kill_proof subproofs, by) |
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| kill_step step = step |
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and kill_proof (Proof (fix, assms, steps)) = |
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Proof (fix, kill_assms assms, map kill_step steps) |
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in |
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kill_proof proof |
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end |
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fun prefix_of_depth n = replicate_string (n + 1) |
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val assume_prefix = "a" |
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val have_prefix = "f" |
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||
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val relabel_proof = |
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let |
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fun fresh_label depth prefix (old as (l, subst, next)) = |
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if l = no_label then |
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old |
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else |
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let val l' = (prefix_of_depth depth prefix, next) in |
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(l', (l, l') :: subst, next + 1) |
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end |
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fun relabel_facts subst = apfst (maps (the_list o AList.lookup (op =) subst)) |
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fun relabel_assm depth (l, t) (subst, next) = |
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let val (l, subst, next) = (l, subst, next) |> fresh_label depth assume_prefix in |
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((l, t), (subst, next)) |
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end |
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fun relabel_assms subst depth assms = fold_map (relabel_assm depth) assms (subst, 1) ||> fst |
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fun relabel_steps _ _ _ [] = [] |
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| relabel_steps subst depth next (Prove (qs, xs, l, t, sub, by) :: steps) = |
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let |
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val (l, subst, next) = (l, subst, next) |> fresh_label depth have_prefix |
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val sub = relabel_proofs subst depth sub |
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val by = by |> relabel_byline subst |
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in |
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Prove (qs, xs, l, t, sub, by) :: relabel_steps subst depth next steps |
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end |
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| relabel_steps subst depth next (step :: steps) = |
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step :: relabel_steps subst depth next steps |
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and relabel_proof subst depth (Proof (fix, assms, steps)) = |
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let val (assms, subst) = relabel_assms subst depth assms in |
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Proof (fix, assms, relabel_steps subst depth 1 steps) |
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end |
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and relabel_byline subst byline = apfst (relabel_facts subst) byline |
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and relabel_proofs subst depth = map (relabel_proof subst (depth + 1)) |
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in |
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relabel_proof [] 0 |
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end |
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|
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val chain_direct_proof = |
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let |
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fun chain_qs_lfs NONE lfs = ([], lfs) |
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| chain_qs_lfs (SOME l0) lfs = |
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if member (op =) lfs l0 then ([Then], lfs |> remove (op =) l0) else ([], lfs) |
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fun chain_step lbl (Prove (qs, xs, l, t, subproofs, ((lfs, gfs), method))) = |
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let val (qs', lfs) = chain_qs_lfs lbl lfs in |
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Prove (qs' @ qs, xs, l, t, chain_proofs subproofs, ((lfs, gfs), method)) |
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end |
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| chain_step _ step = step |
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and chain_steps _ [] = [] |
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| chain_steps (prev as SOME _) (i :: is) = |
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chain_step prev i :: chain_steps (label_of_step i) is |
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| chain_steps _ (i :: is) = i :: chain_steps (label_of_step i) is |
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and chain_proof (Proof (fix, assms, steps)) = |
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Proof (fix, assms, chain_steps (try (List.last #> fst) assms) steps) |
|
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and chain_proofs proofs = map (chain_proof) proofs |
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in chain_proof end |
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fun maybe_mk_Trueprop t = t |> fastype_of t = HOLogic.boolT ? HOLogic.mk_Trueprop |
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val maybe_dest_Trueprop = perhaps (try HOLogic.dest_Trueprop) |
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|
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type isar_params = |
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bool * bool * string * string * Time.time option * real * bool * (term, string) atp_step list * |
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thm |
|
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|
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sledgehammer sendback always uses Markup.padding_command: sensible default for most practical applications -- old-style in-line replacement is superseded by auto mode or panel;
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fun isar_proof_text ctxt isar_proofs |
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(debug, verbose, metis_type_enc, metis_lam_trans, preplay_timeout, isar_compress, |
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isar_try0, atp_proof, goal) |
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(one_line_params as (_, _, _, _, subgoal, subgoal_count)) = |
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let |
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val (params, hyp_ts, concl_t) = strip_subgoal goal subgoal ctxt |
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val (_, ctxt) = |
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params |
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223 |
|> map (fn (s, T) => (Binding.name s, SOME T, NoSyn)) |
54507 | 224 |
|> (fn fixes => ctxt |> Variable.set_body false |> Proof_Context.add_fixes fixes) |
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225 |
val one_line_proof = one_line_proof_text 0 one_line_params |
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226 |
val do_preplay = preplay_timeout <> SOME Time.zeroTime |
49883 | 227 |
|
54700 | 228 |
fun get_role keep_role ((num, _), role, t, _, _) = |
229 |
if keep_role role then SOME (raw_label_of_num num, t) else NONE |
|
230 |
||
49883 | 231 |
fun isar_proof_of () = |
232 |
let |
|
233 |
val atp_proof = |
|
234 |
atp_proof |
|
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|
235 |
|> truncate_at_false |
54505 | 236 |
|> rpair [] |-> fold_rev add_line |
49883 | 237 |
|> rpair [] |-> fold_rev add_nontrivial_line |
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238 |
|> add_desired_lines [] |
54700 | 239 |
|
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|
240 |
val conjs = |
54700 | 241 |
map_filter (fn (name, role, _, _, _) => |
242 |
if member (op =) [Conjecture, Negated_Conjecture] role then SOME name else NONE) |
|
243 |
atp_proof |
|
244 |
val assms = map_filter (get_role (curry (op =) Hypothesis)) atp_proof |
|
245 |
val lems = |
|
246 |
map_filter (get_role (curry (op =) Lemma)) atp_proof |
|
54712 | 247 |
|> map (fn (l, t) => Prove ([], [], l, maybe_mk_Trueprop t, [], (([], []), ArithM))) |
54700 | 248 |
|
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|
249 |
val bot = atp_proof |> List.last |> #1 |
54700 | 250 |
|
51145 | 251 |
val refute_graph = |
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|
252 |
atp_proof |
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|
253 |
|> map (fn (name, _, _, _, from) => (from, name)) |
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|
254 |
|> make_refute_graph bot |
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|
255 |
|> fold (Atom_Graph.default_node o rpair ()) conjs |
54700 | 256 |
|
51145 | 257 |
val axioms = axioms_of_refute_graph refute_graph conjs |
54700 | 258 |
|
51145 | 259 |
val tainted = tainted_atoms_of_refute_graph refute_graph conjs |
51156 | 260 |
val is_clause_tainted = exists (member (op =) tainted) |
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|
261 |
val steps = |
49883 | 262 |
Symtab.empty |
51201 | 263 |
|> fold (fn (name as (s, _), role, t, rule, _) => |
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diff
changeset
|
264 |
Symtab.update_new (s, (rule, |
51156 | 265 |
t |> (if is_clause_tainted [name] then |
54712 | 266 |
role <> Conjecture ? (maybe_dest_Trueprop #> s_not) |
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|
267 |
#> fold exists_of (map Var (Term.add_vars t [])) |
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|
268 |
else |
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|
269 |
I)))) |
49883 | 270 |
atp_proof |
54700 | 271 |
|
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|
272 |
fun is_clause_skolemize_rule [(s, _)] = |
54505 | 273 |
Option.map (is_skolemize_rule o fst) (Symtab.lookup steps s) = SOME true |
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|
274 |
| is_clause_skolemize_rule _ = false |
54700 | 275 |
|
54712 | 276 |
(* The assumptions and conjecture are "prop"s; the other formulas are "bool"s (for ATPs) or |
277 |
"prop"s (for Z3). TODO: Always use "prop". *) |
|
54505 | 278 |
fun prop_of_clause [(num, _)] = |
279 |
Symtab.lookup steps num |> the |> snd |> maybe_mk_Trueprop |> close_form |
|
50016 | 280 |
| prop_of_clause names = |
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|
281 |
let |
54712 | 282 |
val lits = |
283 |
map (maybe_dest_Trueprop o snd) (map_filter (Symtab.lookup steps o fst) names) |
|
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|
284 |
in |
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changeset
|
285 |
case List.partition (can HOLogic.dest_not) lits of |
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changeset
|
286 |
(negs as _ :: _, pos as _ :: _) => |
54507 | 287 |
s_imp (Library.foldr1 s_conj (map HOLogic.dest_not negs), Library.foldr1 s_disj pos) |
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changeset
|
288 |
| _ => fold (curry s_disj) lits @{term False} |
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changeset
|
289 |
end |
50016 | 290 |
|> HOLogic.mk_Trueprop |> close_form |
54700 | 291 |
|
292 |
val is_fixed = Variable.is_declared ctxt orf can Name.dest_skolem |
|
293 |
fun skolems_of t = Term.add_frees t [] |> filter_out (is_fixed o fst) |> rev |
|
294 |
||
295 |
fun maybe_show outer c = |
|
296 |
(outer andalso length c = 1 andalso subset (op =) (c, conjs)) ? cons Show |
|
297 |
||
298 |
fun isar_steps outer predecessor accum [] = |
|
299 |
accum |
|
300 |
|> (if tainted = [] then |
|
301 |
cons (Prove (if outer then [Show] else [], [], no_label, concl_t, [], |
|
302 |
(([the predecessor], []), MetisM))) |
|
303 |
else |
|
304 |
I) |
|
305 |
|> rev |
|
306 |
| isar_steps outer _ accum (Have (gamma, c) :: infs) = |
|
307 |
let |
|
308 |
val l = label_of_clause c |
|
309 |
val t = prop_of_clause c |
|
310 |
val by = (fold add_fact_of_dependencies gamma no_facts, MetisM) |
|
311 |
fun prove sub by = Prove (maybe_show outer c [], [], l, t, sub, by) |
|
312 |
fun do_rest l step = isar_steps outer (SOME l) (step :: accum) infs |
|
313 |
in |
|
314 |
if is_clause_tainted c then |
|
54712 | 315 |
(case gamma of |
54700 | 316 |
[g] => |
317 |
if is_clause_skolemize_rule g andalso is_clause_tainted g then |
|
318 |
let |
|
319 |
val subproof = Proof (skolems_of (prop_of_clause g), [], rev accum) |
|
320 |
in |
|
321 |
isar_steps outer (SOME l) [prove [subproof] (no_facts, MetisM)] [] |
|
322 |
end |
|
51148
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51147
diff
changeset
|
323 |
else |
54700 | 324 |
do_rest l (prove [] by) |
54712 | 325 |
| _ => do_rest l (prove [] by)) |
54700 | 326 |
else |
327 |
if is_clause_skolemize_rule c then |
|
328 |
do_rest l (Prove ([], skolems_of t, l, t, [], by)) |
|
329 |
else |
|
330 |
do_rest l (prove [] by) |
|
331 |
end |
|
332 |
| isar_steps outer predecessor accum (Cases cases :: infs) = |
|
333 |
let |
|
334 |
fun isar_case (c, infs) = |
|
335 |
isar_proof false [] [(label_of_clause c, prop_of_clause c)] [] infs |
|
336 |
val c = succedent_of_cases cases |
|
337 |
val l = label_of_clause c |
|
338 |
val t = prop_of_clause c |
|
339 |
val step = |
|
340 |
Prove (maybe_show outer c [], [], l, t, map isar_case cases, |
|
341 |
((the_list predecessor, []), MetisM)) |
|
342 |
in |
|
343 |
isar_steps outer (SOME l) (step :: accum) infs |
|
344 |
end |
|
345 |
and isar_proof outer fix assms lems infs = |
|
346 |
Proof (fix, assms, lems @ isar_steps outer NONE [] infs) |
|
347 |
||
348 |
val isar_proof_of_direct_proof = isar_proof true params assms lems |
|
51179
0d5f8812856f
split isar_step into isar_step, fix, assms; made isar_proof explicit; register fixed variables in ctxt and auto_fix terms to avoid superfluous annotations
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parents:
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diff
changeset
|
349 |
|
52592
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optimize isar-proofs by trying different proof methods
smolkas
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diff
changeset
|
350 |
(* 60 seconds seems like a good interpreation of "no timeout" *) |
8a25b17e3d79
optimize isar-proofs by trying different proof methods
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diff
changeset
|
351 |
val preplay_timeout = preplay_timeout |> the_default (seconds 60.0) |
8a25b17e3d79
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smolkas
parents:
52556
diff
changeset
|
352 |
|
51741 | 353 |
val clean_up_labels_in_proof = |
51165 | 354 |
chain_direct_proof |
355 |
#> kill_useless_labels_in_proof |
|
356 |
#> relabel_proof |
|
53761
4d34e267fba9
use configuration mechanism for low-level tracing
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parents:
53586
diff
changeset
|
357 |
val (preplay_interface as {overall_preplay_stats, ...}, isar_proof) = |
51145 | 358 |
refute_graph |
54699 | 359 |
(* |
54712 | 360 |
|> tap (tracing o prefix "REFUTE GRAPH: " o string_of_refute_graph) |
54699 | 361 |
*) |
51031
63d71b247323
more robustness in Isar proof reconstruction (cf. bug report by Ondrej)
blanchet
parents:
51026
diff
changeset
|
362 |
|> redirect_graph axioms tainted bot |
54699 | 363 |
(* |
54712 | 364 |
|> tap (tracing o prefix "DIRECT PROOF: " o string_of_direct_proof) |
54699 | 365 |
*) |
51179
0d5f8812856f
split isar_step into isar_step, fix, assms; made isar_proof explicit; register fixed variables in ctxt and auto_fix terms to avoid superfluous annotations
smolkas
parents:
51178
diff
changeset
|
366 |
|> isar_proof_of_direct_proof |
54712 | 367 |
|> postprocess_remove_unreferenced_steps I |
52556
c8357085217c
completely rewrote SH compress; added two parameters for experimentation/fine grained control
smolkas
parents:
52555
diff
changeset
|
368 |
|> relabel_proof_canonically |
54500 | 369 |
|> `(proof_preplay_interface debug ctxt metis_type_enc metis_lam_trans do_preplay |
53761
4d34e267fba9
use configuration mechanism for low-level tracing
blanchet
parents:
53586
diff
changeset
|
370 |
preplay_timeout) |
52626 | 371 |
val ((preplay_time, preplay_fail), isar_proof) = |
52556
c8357085217c
completely rewrote SH compress; added two parameters for experimentation/fine grained control
smolkas
parents:
52555
diff
changeset
|
372 |
isar_proof |
54501 | 373 |
|> compress_proof (if isar_proofs = SOME true then isar_compress else 1000.0) |
53762 | 374 |
preplay_interface |
52632
23393c31c7fe
added sledgehammer parameters isar_try0 and isar_minimize and their negative aliases
smolkas
parents:
52626
diff
changeset
|
375 |
|> isar_try0 ? try0 preplay_timeout preplay_interface |
54712 | 376 |
|> postprocess_remove_unreferenced_steps (isar_try0 ? min_deps_of_step preplay_interface) |
52626 | 377 |
|> `overall_preplay_stats |
378 |
||> clean_up_labels_in_proof |
|
54500 | 379 |
val isar_text = |
380 |
string_of_proof ctxt metis_type_enc metis_lam_trans subgoal subgoal_count isar_proof |
|
49883 | 381 |
in |
49918
cf441f4a358b
renamed Isar-proof related options + changed semantics of Isar shrinking
blanchet
parents:
49917
diff
changeset
|
382 |
case isar_text of |
49883 | 383 |
"" => |
51190
2654b3965c8d
made "isar_proofs" a 3-way option, to provide a way to totally disable isar_proofs if desired
blanchet
parents:
51187
diff
changeset
|
384 |
if isar_proofs = SOME true then |
50671 | 385 |
"\nNo structured proof available (proof too simple)." |
49883 | 386 |
else |
387 |
"" |
|
388 |
| _ => |
|
50670
eaa540986291
properly take the existential closure of skolems
blanchet
parents:
50557
diff
changeset
|
389 |
let |
eaa540986291
properly take the existential closure of skolems
blanchet
parents:
50557
diff
changeset
|
390 |
val msg = |
51203 | 391 |
(if verbose then |
392 |
let |
|
52592
8a25b17e3d79
optimize isar-proofs by trying different proof methods
smolkas
parents:
52556
diff
changeset
|
393 |
val num_steps = add_proof_steps (steps_of_proof isar_proof) 0 |
51203 | 394 |
in [string_of_int num_steps ^ " step" ^ plural_s num_steps] end |
395 |
else |
|
396 |
[]) @ |
|
52556
c8357085217c
completely rewrote SH compress; added two parameters for experimentation/fine grained control
smolkas
parents:
52555
diff
changeset
|
397 |
(if do_preplay then |
50924 | 398 |
[(if preplay_fail then "may fail, " else "") ^ |
52556
c8357085217c
completely rewrote SH compress; added two parameters for experimentation/fine grained control
smolkas
parents:
52555
diff
changeset
|
399 |
string_of_preplay_time preplay_time] |
50670
eaa540986291
properly take the existential closure of skolems
blanchet
parents:
50557
diff
changeset
|
400 |
else |
eaa540986291
properly take the existential closure of skolems
blanchet
parents:
50557
diff
changeset
|
401 |
[]) |
50277 | 402 |
in |
54507 | 403 |
"\n\nStructured proof" ^ (commas msg |> not (null msg) ? enclose " (" ")") ^ ":\n" ^ |
404 |
Active.sendback_markup [Markup.padding_command] isar_text |
|
50277 | 405 |
end |
49883 | 406 |
end |
407 |
val isar_proof = |
|
408 |
if debug then |
|
409 |
isar_proof_of () |
|
410 |
else case try isar_proof_of () of |
|
411 |
SOME s => s |
|
51190
2654b3965c8d
made "isar_proofs" a 3-way option, to provide a way to totally disable isar_proofs if desired
blanchet
parents:
51187
diff
changeset
|
412 |
| NONE => if isar_proofs = SOME true then |
49883 | 413 |
"\nWarning: The Isar proof construction failed." |
414 |
else |
|
415 |
"" |
|
416 |
in one_line_proof ^ isar_proof end |
|
417 |
||
51187
c344cf148e8f
avoid using "smt" for minimization -- better use the prover itself, since then Sledgehammer gets to try metis again and gives the opportunity to output an Isar proof -- and show Isar proof as fallback for SMT proofs
blanchet
parents:
51179
diff
changeset
|
418 |
fun isar_proof_would_be_a_good_idea preplay = |
c344cf148e8f
avoid using "smt" for minimization -- better use the prover itself, since then Sledgehammer gets to try metis again and gives the opportunity to output an Isar proof -- and show Isar proof as fallback for SMT proofs
blanchet
parents:
51179
diff
changeset
|
419 |
case preplay of |
c344cf148e8f
avoid using "smt" for minimization -- better use the prover itself, since then Sledgehammer gets to try metis again and gives the opportunity to output an Isar proof -- and show Isar proof as fallback for SMT proofs
blanchet
parents:
51179
diff
changeset
|
420 |
Played (reconstr, _) => reconstr = SMT |
54093 | 421 |
| Trust_Playable _ => false |
51187
c344cf148e8f
avoid using "smt" for minimization -- better use the prover itself, since then Sledgehammer gets to try metis again and gives the opportunity to output an Isar proof -- and show Isar proof as fallback for SMT proofs
blanchet
parents:
51179
diff
changeset
|
422 |
| Failed_to_Play _ => true |
c344cf148e8f
avoid using "smt" for minimization -- better use the prover itself, since then Sledgehammer gets to try metis again and gives the opportunity to output an Isar proof -- and show Isar proof as fallback for SMT proofs
blanchet
parents:
51179
diff
changeset
|
423 |
|
53052
a0db255af8c5
sledgehammer sendback always uses Markup.padding_command: sensible default for most practical applications -- old-style in-line replacement is superseded by auto mode or panel;
wenzelm
parents:
53047
diff
changeset
|
424 |
fun proof_text ctxt isar_proofs isar_params num_chained |
49883 | 425 |
(one_line_params as (preplay, _, _, _, _, _)) = |
51190
2654b3965c8d
made "isar_proofs" a 3-way option, to provide a way to totally disable isar_proofs if desired
blanchet
parents:
51187
diff
changeset
|
426 |
(if isar_proofs = SOME true orelse |
2654b3965c8d
made "isar_proofs" a 3-way option, to provide a way to totally disable isar_proofs if desired
blanchet
parents:
51187
diff
changeset
|
427 |
(isar_proofs = NONE andalso isar_proof_would_be_a_good_idea preplay) then |
54500 | 428 |
isar_proof_text ctxt isar_proofs (isar_params ()) |
49883 | 429 |
else |
53052
a0db255af8c5
sledgehammer sendback always uses Markup.padding_command: sensible default for most practical applications -- old-style in-line replacement is superseded by auto mode or panel;
wenzelm
parents:
53047
diff
changeset
|
430 |
one_line_proof_text num_chained) one_line_params |
49883 | 431 |
|
432 |
end; |