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Diffstat (limited to 'test-suite/bugs/closed/4187.v')
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diff --git a/test-suite/bugs/closed/4187.v b/test-suite/bugs/closed/4187.v new file mode 100644 index 00000000..b13ca36a --- /dev/null +++ b/test-suite/bugs/closed/4187.v @@ -0,0 +1,709 @@ +(* Lifted from https://coq.inria.fr/bugs/show_bug.cgi?id=4187 *) +(* File reduced by coq-bug-finder from original input, then from 715 lines to 696 lines *) +(* coqc version 8.4pl5 (December 2014) compiled on Dec 28 2014 03:23:16 with OCaml 4.01.0 + coqtop version 8.4pl5 (December 2014) *) +Set Asymmetric Patterns. +Axiom proof_admitted : False. +Tactic Notation "admit" := case proof_admitted. +Require Import Coq.Lists.List. +Require Import Coq.Setoids.Setoid. +Require Import Coq.Numbers.Natural.Peano.NPeano. +Global Set Implicit Arguments. +Global Generalizable All Variables. +Coercion is_true : bool >-> Sortclass. +Coercion bool_of_sumbool {A B} (x : {A} + {B}) : bool := if x then true else false. +Fixpoint ForallT {T} (P : T -> Type) (ls : list T) : Type + := match ls return Type with + | nil => True + | x::xs => (P x * ForallT P xs)%type + end. +Fixpoint Forall_tails {T} (P : list T -> Type) (ls : list T) : Type + := match ls with + | nil => P nil + | x::xs => (P (x::xs) * Forall_tails P xs)%type + end. + +Module Export ADTSynthesis_DOT_Common_DOT_Wf. +Module Export ADTSynthesis. +Module Export Common. +Module Export Wf. + +Section wf. + Section wf_prod. + Context A B (RA : relation A) (RB : relation B). +Definition prod_relation : relation (A * B). +exact (fun ab a'b' => + RA (fst ab) (fst a'b') \/ (fst a'b' = fst ab /\ RB (snd ab) (snd a'b'))). +Defined. + + Fixpoint well_founded_prod_relation_helper + a b + (wf_A : Acc RA a) (wf_B : well_founded RB) {struct wf_A} + : Acc prod_relation (a, b) + := match wf_A with + | Acc_intro fa => (fix wf_B_rec b' (wf_B' : Acc RB b') : Acc prod_relation (a, b') + := Acc_intro + _ + (fun ab => + match ab as ab return prod_relation ab (a, b') -> Acc prod_relation ab with + | (a'', b'') => + fun pf => + match pf with + | or_introl pf' + => @well_founded_prod_relation_helper + _ _ + (fa _ pf') + wf_B + | or_intror (conj pfa pfb) + => match wf_B' with + | Acc_intro fb + => eq_rect + _ + (fun a'' => Acc prod_relation (a'', b'')) + (wf_B_rec _ (fb _ pfb)) + _ + pfa + end + end + end) + ) b (wf_B b) + end. + + Definition well_founded_prod_relation : well_founded RA -> well_founded RB -> well_founded prod_relation. + Proof. + intros wf_A wf_B [a b]; hnf in *. + apply well_founded_prod_relation_helper; auto. + Defined. + End wf_prod. + + Section wf_projT1. + Context A (B : A -> Type) (R : relation A). +Definition projT1_relation : relation (sigT B). +exact (fun ab a'b' => + R (projT1 ab) (projT1 a'b')). +Defined. + + Definition well_founded_projT1_relation : well_founded R -> well_founded projT1_relation. + Proof. + intros wf [a b]; hnf in *. + induction (wf a) as [a H IH]. + constructor. + intros y r. + specialize (IH _ r (projT2 y)). + destruct y. + exact IH. + Defined. + End wf_projT1. +End wf. + +Section Fix3. + Context A (B : A -> Type) (C : forall a, B a -> Type) (D : forall a b, C a b -> Type) + (R : A -> A -> Prop) (Rwf : well_founded R) + (P : forall a b c, D a b c -> Type) + (F : forall x : A, (forall y : A, R y x -> forall b c d, P y b c d) -> forall b c d, P x b c d). +Definition Fix3 a b c d : @P a b c d. +exact (@Fix { a : A & { b : B a & { c : C b & D c } } } + (fun x y => R (projT1 x) (projT1 y)) + (well_founded_projT1_relation Rwf) + (fun abcd => P (projT2 (projT2 (projT2 abcd)))) + (fun x f => @F (projT1 x) (fun y r b c d => f (existT _ y (existT _ b (existT _ c d))) r) _ _ _) + (existT _ a (existT _ b (existT _ c d)))). +Defined. +End Fix3. + +End Wf. + +End Common. + +End ADTSynthesis. + +End ADTSynthesis_DOT_Common_DOT_Wf. + +Module Export ADTSynthesis_DOT_Parsers_DOT_StringLike_DOT_Core. +Module Export ADTSynthesis. +Module Export Parsers. +Module Export StringLike. +Module Export Core. +Import Coq.Setoids.Setoid. +Import Coq.Classes.Morphisms. + + + +Module Export StringLike. + Class StringLike {Char : Type} := + { + String :> Type; + is_char : String -> Char -> bool; + length : String -> nat; + take : nat -> String -> String; + drop : nat -> String -> String; + bool_eq : String -> String -> bool; + beq : relation String := fun x y => bool_eq x y + }. + + Arguments StringLike : clear implicits. + Infix "=s" := (@beq _ _) (at level 70, no associativity) : type_scope. + Notation "s ~= [ ch ]" := (is_char s ch) (at level 70, no associativity) : string_like_scope. + Local Open Scope string_like_scope. + + Definition str_le `{StringLike Char} (s1 s2 : String) + := length s1 < length s2 \/ s1 =s s2. + Infix "≤s" := str_le (at level 70, right associativity). + + Class StringLikeProperties (Char : Type) `{StringLike Char} := + { + singleton_unique : forall s ch ch', s ~= [ ch ] -> s ~= [ ch' ] -> ch = ch'; + length_singleton : forall s ch, s ~= [ ch ] -> length s = 1; + bool_eq_char : forall s s' ch, s ~= [ ch ] -> s' ~= [ ch ] -> s =s s'; + is_char_Proper :> Proper (beq ==> eq ==> eq) is_char; + length_Proper :> Proper (beq ==> eq) length; + take_Proper :> Proper (eq ==> beq ==> beq) take; + drop_Proper :> Proper (eq ==> beq ==> beq) drop; + bool_eq_Equivalence :> Equivalence beq; + bool_eq_empty : forall str str', length str = 0 -> length str' = 0 -> str =s str'; + take_short_length : forall str n, n <= length str -> length (take n str) = n; + take_long : forall str n, length str <= n -> take n str =s str; + take_take : forall str n m, take n (take m str) =s take (min n m) str; + drop_length : forall str n, length (drop n str) = length str - n; + drop_0 : forall str, drop 0 str =s str; + drop_drop : forall str n m, drop n (drop m str) =s drop (n + m) str; + drop_take : forall str n m, drop n (take m str) =s take (m - n) (drop n str); + take_drop : forall str n m, take n (drop m str) =s drop m (take (n + m) str) + }. + + Arguments StringLikeProperties Char {_}. +End StringLike. + +End Core. + +End StringLike. + +End Parsers. + +End ADTSynthesis. + +End ADTSynthesis_DOT_Parsers_DOT_StringLike_DOT_Core. + +Module Export ADTSynthesis. +Module Export Parsers. +Module Export ContextFreeGrammar. +Require Import Coq.Strings.String. +Require Import Coq.Lists.List. +Export ADTSynthesis.Parsers.StringLike.Core. +Import ADTSynthesis.Common. + +Local Open Scope string_like_scope. + +Section cfg. + Context {Char : Type}. + + Section definitions. + + Inductive item := + | Terminal (_ : Char) + | NonTerminal (_ : string). + + Definition production := list item. + Definition productions := list production. + + Record grammar := + { + Start_symbol :> string; + Lookup :> string -> productions; + Start_productions :> productions := Lookup Start_symbol; + Valid_nonterminals : list string; + Valid_productions : list productions := map Lookup Valid_nonterminals + }. + End definitions. + + Section parse. + Context {HSL : StringLike Char}. + Variable G : grammar. + + Inductive parse_of (str : String) : productions -> Type := + | ParseHead : forall pat pats, parse_of_production str pat + -> parse_of str (pat::pats) + | ParseTail : forall pat pats, parse_of str pats + -> parse_of str (pat::pats) + with parse_of_production (str : String) : production -> Type := + | ParseProductionNil : length str = 0 -> parse_of_production str nil + | ParseProductionCons : forall n pat pats, + parse_of_item (take n str) pat + -> parse_of_production (drop n str) pats + -> parse_of_production str (pat::pats) + with parse_of_item (str : String) : item -> Type := + | ParseTerminal : forall ch, str ~= [ ch ] -> parse_of_item str (Terminal ch) + | ParseNonTerminal : forall nt, parse_of str (Lookup G nt) + -> parse_of_item str (NonTerminal nt). + End parse. +End cfg. + +Arguments item _ : clear implicits. +Arguments production _ : clear implicits. +Arguments productions _ : clear implicits. +Arguments grammar _ : clear implicits. + +End ContextFreeGrammar. + +Module Export BaseTypes. + +Section recursive_descent_parser. + + Class parser_computational_predataT := + { nonterminals_listT : Type; + initial_nonterminals_data : nonterminals_listT; + is_valid_nonterminal : nonterminals_listT -> String.string -> bool; + remove_nonterminal : nonterminals_listT -> String.string -> nonterminals_listT; + nonterminals_listT_R : nonterminals_listT -> nonterminals_listT -> Prop; + remove_nonterminal_dec : forall ls nonterminal, + is_valid_nonterminal ls nonterminal + -> nonterminals_listT_R (remove_nonterminal ls nonterminal) ls; + ntl_wf : well_founded nonterminals_listT_R }. + + Class parser_removal_dataT' `{predata : parser_computational_predataT} := + { remove_nonterminal_1 + : forall ls ps ps', + is_valid_nonterminal (remove_nonterminal ls ps) ps' + -> is_valid_nonterminal ls ps'; + remove_nonterminal_2 + : forall ls ps ps', + is_valid_nonterminal (remove_nonterminal ls ps) ps' = false + <-> is_valid_nonterminal ls ps' = false \/ ps = ps' }. +End recursive_descent_parser. + +End BaseTypes. +Import Coq.Lists.List. +Import ADTSynthesis.Parsers.ContextFreeGrammar. + +Local Open Scope string_like_scope. + +Section cfg. + Context {Char} {HSL : StringLike Char} {G : grammar Char}. + Context {predata : @parser_computational_predataT} + {rdata' : @parser_removal_dataT' predata}. + + Inductive minimal_parse_of + : forall (str0 : String) (valid : nonterminals_listT) + (str : String), + productions Char -> Type := + | MinParseHead : forall str0 valid str pat pats, + @minimal_parse_of_production str0 valid str pat + -> @minimal_parse_of str0 valid str (pat::pats) + | MinParseTail : forall str0 valid str pat pats, + @minimal_parse_of str0 valid str pats + -> @minimal_parse_of str0 valid str (pat::pats) + with minimal_parse_of_production + : forall (str0 : String) (valid : nonterminals_listT) + (str : String), + production Char -> Type := + | MinParseProductionNil : forall str0 valid str, + length str = 0 + -> @minimal_parse_of_production str0 valid str nil + | MinParseProductionCons : forall str0 valid str n pat pats, + str ≤s str0 + -> @minimal_parse_of_item str0 valid (take n str) pat + -> @minimal_parse_of_production str0 valid (drop n str) pats + -> @minimal_parse_of_production str0 valid str (pat::pats) + with minimal_parse_of_item + : forall (str0 : String) (valid : nonterminals_listT) + (str : String), + item Char -> Type := + | MinParseTerminal : forall str0 valid str ch, + str ~= [ ch ] + -> @minimal_parse_of_item str0 valid str (Terminal ch) + | MinParseNonTerminal + : forall str0 valid str (nt : String.string), + @minimal_parse_of_nonterminal str0 valid str nt + -> @minimal_parse_of_item str0 valid str (NonTerminal nt) + with minimal_parse_of_nonterminal + : forall (str0 : String) (valid : nonterminals_listT) + (str : String), + String.string -> Type := + | MinParseNonTerminalStrLt + : forall str0 valid (nt : String.string) str, + length str < length str0 + -> is_valid_nonterminal initial_nonterminals_data nt + -> @minimal_parse_of str initial_nonterminals_data str (Lookup G nt) + -> @minimal_parse_of_nonterminal str0 valid str nt + | MinParseNonTerminalStrEq + : forall str0 str valid nonterminal, + str =s str0 + -> is_valid_nonterminal initial_nonterminals_data nonterminal + -> is_valid_nonterminal valid nonterminal + -> @minimal_parse_of str0 (remove_nonterminal valid nonterminal) str (Lookup G nonterminal) + -> @minimal_parse_of_nonterminal str0 valid str nonterminal. +End cfg. +Import ADTSynthesis.Common. + +Section general. + Context {Char} {HSL : StringLike Char} {G : grammar Char}. + + Class boolean_parser_dataT := + { predata :> parser_computational_predataT; + split_string_for_production + : item Char -> production Char -> String -> list nat }. + + Global Coercion predata : boolean_parser_dataT >-> parser_computational_predataT. + + Definition split_list_completeT `{data : @parser_computational_predataT} + {str0 valid} + (it : item Char) (its : production Char) + (str : String) + (pf : str ≤s str0) + (split_list : list nat) + + := ({ n : nat + & (minimal_parse_of_item (G := G) (predata := data) str0 valid (take n str) it) + * (minimal_parse_of_production (G := G) str0 valid (drop n str) its) }%type) + -> ({ n : nat + & (In n split_list) + * (minimal_parse_of_item (G := G) str0 valid (take n str) it) + * (minimal_parse_of_production (G := G) str0 valid (drop n str) its) }%type). + + Class boolean_parser_completeness_dataT' `{data : boolean_parser_dataT} := + { split_string_for_production_complete + : forall str0 valid str (pf : str ≤s str0) nt, + is_valid_nonterminal initial_nonterminals_data nt + -> ForallT + (Forall_tails + (fun prod + => match prod return Type with + | nil => True + | it::its + => @split_list_completeT data str0 valid it its str pf (split_string_for_production it its str) + end)) + (Lookup G nt) }. +End general. + +Module Export BooleanRecognizer. +Import Coq.Numbers.Natural.Peano.NPeano. +Import Coq.Arith.Compare_dec. +Import Coq.Arith.Wf_nat. + +Section recursive_descent_parser. + Context {Char} {HSL : StringLike Char} {HSLP : StringLikeProperties Char} {G : grammar Char}. + Context {data : @boolean_parser_dataT Char _}. + + Section bool. + Section parts. +Definition parse_item + (str_matches_nonterminal : String.string -> bool) + (str : String) + (it : item Char) + : bool. +Admitted. + + Section production. + Context {str0} + (parse_nonterminal + : forall (str : String), + str ≤s str0 + -> String.string + -> bool). + + Fixpoint parse_production + (str : String) + (pf : str ≤s str0) + (prod : production Char) + : bool. + Proof. + refine + match prod with + | nil => + + Nat.eq_dec (length str) 0 + | it::its + => let parse_production' := fun str pf => parse_production str pf its in + fold_right + orb + false + (map (fun n => + (parse_item + (parse_nonterminal (str := take n str) _) + (take n str) + it) + && parse_production' (drop n str) _)%bool + (split_string_for_production it its str)) + end; + revert pf; clear -HSLP; intros; admit. + Defined. + End production. + + Section productions. + Context {str0} + (parse_nonterminal + : forall (str : String) + (pf : str ≤s str0), + String.string -> bool). +Definition parse_productions + (str : String) + (pf : str ≤s str0) + (prods : productions Char) + : bool. +exact (fold_right orb + false + (map (parse_production parse_nonterminal pf) + prods)). +Defined. + End productions. + + Section nonterminals. + Section step. + Context {str0 valid} + (parse_nonterminal + : forall (p : String * nonterminals_listT), + prod_relation (ltof _ length) nonterminals_listT_R p (str0, valid) + -> forall str : String, + str ≤s fst p -> String.string -> bool). + + Definition parse_nonterminal_step + (str : String) + (pf : str ≤s str0) + (nt : String.string) + : bool. + Proof. + refine + (if lt_dec (length str) (length str0) + then + parse_productions + (@parse_nonterminal + (str : String, initial_nonterminals_data) + (or_introl _)) + (or_intror (reflexivity _)) + (Lookup G nt) + else + if Sumbool.sumbool_of_bool (is_valid_nonterminal valid nt) + then + parse_productions + (@parse_nonterminal + (str0 : String, remove_nonterminal valid nt) + (or_intror (conj eq_refl (remove_nonterminal_dec _ nt _)))) + (str := str) + _ + (Lookup G nt) + else + false); + assumption. + Defined. + End step. + + Section wf. +Definition parse_nonterminal_or_abort + : forall (p : String * nonterminals_listT) + (str : String), + str ≤s fst p + -> String.string + -> bool. +exact (Fix3 + _ _ _ + (well_founded_prod_relation + (well_founded_ltof _ length) + ntl_wf) + _ + (fun sl => @parse_nonterminal_step (fst sl) (snd sl))). +Defined. +Definition parse_nonterminal + (str : String) + (nt : String.string) + : bool. +exact (@parse_nonterminal_or_abort + (str : String, initial_nonterminals_data) str + (or_intror (reflexivity _)) nt). +Defined. + End wf. + End nonterminals. + End parts. + End bool. +End recursive_descent_parser. + +Section cfg. + Context {Char} {HSL : StringLike Char} {HSLP : @StringLikeProperties Char HSL} (G : grammar Char). + + Section definitions. + Context (P : String -> String.string -> Type). + + Definition Forall_parse_of_item' + (Forall_parse_of : forall {str pats} (p : parse_of G str pats), Type) + {str it} (p : parse_of_item G str it) + := match p return Type with + | ParseTerminal ch pf => unit + | ParseNonTerminal nt p' + => (P str nt * Forall_parse_of p')%type + end. + + Fixpoint Forall_parse_of {str pats} (p : parse_of G str pats) + := match p with + | ParseHead pat pats p' + => Forall_parse_of_production p' + | ParseTail _ _ p' + => Forall_parse_of p' + end + with Forall_parse_of_production {str pat} (p : parse_of_production G str pat) + := match p return Type with + | ParseProductionNil pf => unit + | ParseProductionCons pat strs pats p' p'' + => (Forall_parse_of_item' (@Forall_parse_of) p' * Forall_parse_of_production p'')%type + end. + + Definition Forall_parse_of_item {str it} (p : parse_of_item G str it) + := @Forall_parse_of_item' (@Forall_parse_of) str it p. + End definitions. + + End cfg. + +Section recursive_descent_parser_list. + Context {Char} {HSL : StringLike Char} {HLSP : StringLikeProperties Char} {G : grammar Char}. +Definition rdp_list_nonterminals_listT : Type. +exact (list String.string). +Defined. +Definition rdp_list_is_valid_nonterminal : rdp_list_nonterminals_listT -> String.string -> bool. +admit. +Defined. +Definition rdp_list_remove_nonterminal : rdp_list_nonterminals_listT -> String.string -> rdp_list_nonterminals_listT. +admit. +Defined. +Definition rdp_list_nonterminals_listT_R : rdp_list_nonterminals_listT -> rdp_list_nonterminals_listT -> Prop. +exact (ltof _ (@List.length _)). +Defined. + Lemma rdp_list_remove_nonterminal_dec : forall ls prods, + @rdp_list_is_valid_nonterminal ls prods = true + -> @rdp_list_nonterminals_listT_R (@rdp_list_remove_nonterminal ls prods) ls. +admit. +Defined. + Lemma rdp_list_ntl_wf : well_founded rdp_list_nonterminals_listT_R. + Proof. + unfold rdp_list_nonterminals_listT_R. + intro. + apply well_founded_ltof. + Defined. + + Global Instance rdp_list_predata : parser_computational_predataT + := { nonterminals_listT := rdp_list_nonterminals_listT; + initial_nonterminals_data := Valid_nonterminals G; + is_valid_nonterminal := rdp_list_is_valid_nonterminal; + remove_nonterminal := rdp_list_remove_nonterminal; + nonterminals_listT_R := rdp_list_nonterminals_listT_R; + remove_nonterminal_dec := rdp_list_remove_nonterminal_dec; + ntl_wf := rdp_list_ntl_wf }. +End recursive_descent_parser_list. + +Section sound. + Section general. + Context {Char} {HSL : StringLike Char} {HSLP : StringLikeProperties Char} (G : grammar Char). + Context {data : @boolean_parser_dataT Char _} + {cdata : @boolean_parser_completeness_dataT' Char _ G data} + {rdata : @parser_removal_dataT' predata}. + + Section parts. + + Section nonterminals. + Section wf. + + Lemma parse_nonterminal_sound + (str : String) (nonterminal : String.string) + : parse_nonterminal (G := G) str nonterminal + = true + -> parse_of_item G str (NonTerminal nonterminal). +admit. +Defined. + End wf. + End nonterminals. + End parts. + End general. +End sound. + +Import Coq.Strings.String. +Import ADTSynthesis.Parsers.ContextFreeGrammar. + +Fixpoint list_to_productions {T} (default : T) (ls : list (string * T)) : string -> T + := match ls with + | nil => fun _ => default + | (str, t)::ls' => fun s => if string_dec str s + then t + else list_to_productions default ls' s + end. + +Fixpoint list_to_grammar {T} (default : productions T) (ls : list (string * productions T)) : grammar T + := {| Start_symbol := hd ""%string (map (@fst _ _) ls); + Lookup := list_to_productions default ls; + Valid_nonterminals := map (@fst _ _) ls |}. + +Section interface. + Context {Char} (G : grammar Char). +Definition production_is_reachable (p : production Char) : Prop. +admit. +Defined. +Definition split_list_is_complete `{HSL : StringLike Char} (str : String) (it : item Char) (its : production Char) + (splits : list nat) + : Prop. +exact (forall n, + n <= length str + -> parse_of_item G (take n str) it + -> parse_of_production G (drop n str) its + -> production_is_reachable (it::its) + -> List.In n splits). +Defined. + + Record Splitter := + { + string_type :> StringLike Char; + splits_for : String -> item Char -> production Char -> list nat; + + string_type_properties :> StringLikeProperties Char; + splits_for_complete : forall str it its, + split_list_is_complete str it its (splits_for str it its) + + }. + Global Existing Instance string_type_properties. + + Record Parser (HSL : StringLike Char) := + { + has_parse : @String Char HSL -> bool; + + has_parse_sound : forall str, + has_parse str = true + -> parse_of_item G str (NonTerminal (Start_symbol G)); + + has_parse_complete : forall str (p : parse_of_item G str (NonTerminal (Start_symbol G))), + Forall_parse_of_item + (fun _ nt => List.In nt (Valid_nonterminals G)) + p + -> has_parse str = true + }. +End interface. + +Module Export ParserImplementation. + +Section implementation. + Context {Char} {G : grammar Char}. + Context (splitter : Splitter G). + + Local Instance parser_data : @boolean_parser_dataT Char _ := + { predata := rdp_list_predata (G := G); + split_string_for_production it its str + := splits_for splitter str it its }. + + Program Definition parser : Parser G splitter + := {| has_parse str := parse_nonterminal (G := G) (data := parser_data) str (Start_symbol G); + has_parse_sound str Hparse := parse_nonterminal_sound G _ _ Hparse; + has_parse_complete str p Hp := _ |}. + Next Obligation. +admit. +Defined. +End implementation. + +End ParserImplementation. + +Section implementation. + Context {Char} {ls : list (String.string * productions Char)}. + Local Notation G := (list_to_grammar (nil::nil) ls) (only parsing). + Context (splitter : Splitter G). + + Local Instance parser_data : @boolean_parser_dataT Char _ := parser_data splitter. + + Goal forall str : @String Char splitter, + let G' := + @BooleanRecognizer.parse_nonterminal Char splitter splitter G parser_data str G = true in + G'. + intros str G'. + Timeout 1 assert (pf' : G' -> Prop) by abstract admit. |