X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Flib%2Fturing%2Funiversal%2Funi_step.ma;h=4761ce135ba68029456291fc7c88b4fe24447813;hb=5535cd4e08fd8d1e7e6e067eac1bb6c1bf8fcbbf;hp=a2734d3330391868b8332d86de3dd25d7721f558;hpb=43f6de7986407cb15b5b39b18eb59d19d0abfd20;p=helm.git

diff --git a/matita/matita/lib/turing/universal/uni_step.ma b/matita/matita/lib/turing/universal/uni_step.ma
index a2734d333..4761ce135 100644
--- a/matita/matita/lib/turing/universal/uni_step.ma
+++ b/matita/matita/lib/turing/universal/uni_step.ma
@@ -15,6 +15,8 @@
 *)
 
 include "turing/universal/copy.ma".
+include "turing/universal/move_tape.ma".
+include "turing/universal/match_machines.ma".
 
 (*
 
@@ -55,46 +57,44 @@ if is_true(current) (* current state is final *)
 *)
 
 definition init_match ≝ 
-  seq ? (mark ?) 
-    (seq ? (adv_to_mark_r ? (λc:STape.is_grid (\fst c)))
-      (seq ? (move_r ?) 
-        (seq ? (mark ?)
-          (seq ? (move_l ?) 
-            (adv_to_mark_l ? (is_marked ?)))))).
-            
+  mark ? · adv_to_mark_r ? (λc:STape.is_grid (\fst c)) · move_r ? · 
+    move_r ? · mark ? · move_l ? · adv_to_mark_l ? (is_marked ?).
+             
 definition R_init_match ≝ λt1,t2.
   ∀ls,l,rs,c,d. no_grids (〈c,false〉::l) → no_marks l → 
-  t1 = midtape STape ls 〈c,false〉 (l@〈grid,false〉::〈d,false〉::rs) →
-  t2 = midtape STape ls 〈c,true〉 (l@〈grid,false〉::〈d,true〉::rs).
+  t1 = midtape STape ls 〈c,false〉 (l@〈grid,false〉::〈bar,false〉::〈d,false〉::rs) →
+  t2 = midtape STape ls 〈c,true〉 (l@〈grid,false〉::〈bar,false〉::〈d,true〉::rs).
   
 lemma sem_init_match : Realize ? init_match R_init_match.
 #intape 
 cases (sem_seq ????? (sem_mark ?)
        (sem_seq ????? (sem_adv_to_mark_r ? (λc:STape.is_grid (\fst c)))
         (sem_seq ????? (sem_move_r ?)
-         (sem_seq ????? (sem_mark ?)
-          (sem_seq ????? (sem_move_l ?)
-           (sem_adv_to_mark_l ? (is_marked ?)))))) intape)
+         (sem_seq ????? (sem_move_r ?)
+          (sem_seq ????? (sem_mark ?)
+           (sem_seq ????? (sem_move_l ?)
+            (sem_adv_to_mark_l ? (is_marked ?))))))) intape)
 #k * #outc * #Hloop #HR 
 @(ex_intro ?? k) @(ex_intro ?? outc) % [@Hloop] -Hloop
 #ls #l #rs #c #d #Hnogrids #Hnomarks #Hintape
 cases HR -HR
-#ta * whd in ⊢ (%→?); #Hta lapply (Hta … Hintape) -Hta -Hintape #Hta
-* #tb * whd in ⊢ (%→?); #Htb cases (Htb … Hta) -Htb -Hta 
+#ta * whd in ⊢ (%→?); * #Hta #_ lapply (Hta … Hintape) -Hta -Hintape #Hta
+* #tb * whd in ⊢ (%→?); * #_ #Htb cases (Htb … Hta) -Htb -Hta 
   [* #Hgridc @False_ind @(absurd … Hgridc) @eqnot_to_noteq 
    @(Hnogrids 〈c,false〉) @memb_hd ]
-* #Hgrdic #Htb lapply (Htb l 〈grid,false〉 (〈d,false〉::rs) (refl …) (refl …) ?) 
+* * #Hgrdic #Htb #_ lapply (Htb l 〈grid,false〉 (〈bar,false〉::〈d,false〉::rs) (refl …) (refl …) ?) 
   [#x #membl @Hnogrids @memb_cons @membl] -Htb #Htb
-* #tc * whd in ⊢ (%→?); #Htc lapply (Htc … Htb) -Htc -Htb #Htc
-* #td * whd in ⊢ (%→?); #Htd lapply (Htd … Htc) -Htd -Htc #Htd
-* #te * whd in ⊢ (%→?); #Hte lapply (Hte … Htd) -Hte -Htd #Hte
-whd in ⊢ (%→?); #Htf cases (Htf … Hte) -Htf -Hte 
-  [* whd in ⊢ ((??%?)→?); #Habs destruct (Habs)]
-* #_ #Htf lapply (Htf (reverse ? l) 〈c,true〉 ls (refl …) (refl …) ?) 
-  [#x #membl @Hnomarks @daemon] -Htf #Htf >Htf >reverse_reverse %
+* #tc * whd in ⊢ (%→?); * #_ #Htc lapply (Htc … Htb) -Htc -Htb #Htc
+* #td * whd in ⊢ (%→?); * #_ #Htd lapply (Htd … Htc) -Htd -Htc #Htd
+* #te * whd in ⊢ (%→?); * #Hte #_ lapply (Hte … Htd) -Hte -Htd #Hte
+* #tf * whd in ⊢ (%→?); * #_ #Htf lapply (Htf … Hte) -Htf -Hte #Htf
+whd in ⊢ (%→?); * #_ #Htg cases (Htg … Htf) -Htg -Htf
+#_ #Htg cases (Htg (refl …)) -Htg #Htg #_
+lapply (Htg (〈grid,false〉::reverse ? l) 〈c,true〉 ls (refl …) (refl …) ?) 
+  [#x #membl @Hnomarks @daemon] -Htg #Htg >Htg >reverse_cons >reverse_reverse
+   >associative_append %
 qed.
 
-
 (* init_copy 
 
            init_current_on_match; (* no marks in current *)
@@ -105,10 +105,8 @@ qed.
 *)
 
 definition init_copy ≝ 
-  seq ? init_current_on_match
-    (seq ? (move_r ?) 
-      (seq ? (adv_to_mark_r ? (is_marked ?))
-        (adv_mark_r ?))).
+  init_current_on_match · move_r ? · 
+    adv_to_mark_r ? (is_marked ?) · adv_mark_r ?.
 
 definition R_init_copy ≝ λt1,t2.
   ∀l1,l2,c,ls,d,rs. 
@@ -136,21 +134,22 @@ cases (sem_seq ????? sem_init_current_on_match
 #l1 #l2 #c #ls #d #rs #Hl1marks #Hl1grids #Hl2marks #Hc #Hintape
 cases HR -HR
 #ta * whd in ⊢ (%→?); #Hta lapply (Hta … Hl1grids Hc Hintape) -Hta -Hintape #Hta
-* #tb * whd in ⊢ (%→?); #Htb lapply (Htb  … Hta) -Htb -Hta
+* #tb * whd in ⊢ (%→?); * #_ #Htb lapply (Htb  … Hta) -Htb -Hta
 generalize in match Hl1marks; -Hl1marks cases (list_last ? l1) 
   [#eql1 >eql1 #Hl1marks whd in ⊢ ((???%)→?); whd in ⊢ ((???(????%))→?); #Htb
-   * #tc * whd in ⊢ (%→?); #Htc lapply (Htc  … Htb) -Htc -Htb *
+   * #tc * whd in ⊢ (%→?); * #_ #Htc lapply (Htc  … Htb) -Htc -Htb *
     [* whd in ⊢ ((??%?)→?); #Htemp destruct (Htemp)]
-   * #_ #Htc lapply (Htc … (refl …) (refl …) ?)
+   * * #_ #Htc #_ lapply (Htc … (refl …) (refl …) ?)
     [#x #membx @Hl2marks @membx]
-   #Htc whd in ⊢ (%→?); #Houtc lapply (Houtc … Htc) -Houtc -Htc #Houtc
+   #Htc whd in ⊢ (%→?); * #Houtc #_ cases (Houtc (reverse ? l2@〈grid,false〉::〈c,true〉::〈grid,false〉::ls) comma)
+   -Houtc #Houtc lapply (Houtc … Htc) -Houtc -Htc #Houtc #_
    >Houtc %
   |* #c1 * #tl #eql1 >eql1 #Hl1marks >reverse_append >reverse_single 
    whd in ⊢ ((???%)→?); whd in ⊢ ((???(????%))→?);
    >associative_append whd in ⊢ ((???(????%))→?); #Htb
-   * #tc * whd in ⊢ (%→?); #Htc lapply (Htc  … Htb) -Htc -Htb *
+   * #tc * whd in ⊢ (%→?); * #_ #Htc lapply (Htc  … Htb) -Htc -Htb *
     [* >Hl1marks [#Htemp destruct (Htemp)] @memb_append_l2 @memb_hd]
-   * #_ >append_cons <associative_append #Htc lapply (Htc … (refl …) (refl …) ?)
+   * * #_ >append_cons <associative_append #Htc lapply (Htc … (refl …) (refl …) ?)
     [#x #membx cases (memb_append … membx) -membx #membx
       [cases (memb_append … membx) -membx #membx
         [@Hl1marks @memb_append_l1 @daemon
@@ -158,7 +157,9 @@ generalize in match Hl1marks; -Hl1marks cases (list_last ? l1)
         ]
       |@Hl2marks @membx
       ]]
-  #Htc whd in ⊢ (%→?); #Houtc lapply (Houtc … Htc) -Houtc -Htc #Houtc
+  -Htc #Htc #_ whd in ⊢ (%→?); * #Houtc #_ cases (Houtc (reverse (FinProd FSUnialpha FinBool) ((reverse STape tl@[〈grid,false〉])@l2)
+     @c1::〈c,true〉::〈grid,false〉::ls) comma)
+  -Houtc #Houtc lapply (Houtc … Htc) -Houtc -Htc #Houtc #_
   >Houtc >reverse_append >reverse_append >reverse_single 
   >reverse_reverse >associative_append >associative_append 
   >associative_append %
@@ -234,12 +235,8 @@ cases HR -HR
   ]
 qed. *)
 
-include "turing/universal/move_tape.ma".
-
-definition exec_move ≝ 
-  seq ? init_copy
-    (seq ? copy
-      (seq ? (move_r …) move_tape)).
+definition exec_action ≝ 
+  init_copy · copy · move_r … · move_tape.
 
 definition map_move ≝ 
   λc,mv.match c with [ null ⇒ None ? | _ ⇒ Some ? 〈c,false,move_of_unialpha mv〉 ].
@@ -251,7 +248,7 @@ definition map_move ≝
        mv ≠ null → c1 ≠ null
      dal fatto che c1 e mv sono contenuti nella table
  *)
-definition R_exec_move ≝ λt1,t2.
+definition R_exec_action ≝ λt1,t2.
   ∀n,curconfig,ls,rs,c0,c1,s0,s1,table1,newconfig,mv,table2.
   table_TM n (table1@〈comma,false〉::〈s1,false〉::newconfig@〈c1,false〉::〈comma,false〉::〈mv,false〉::table2) → 
   no_marks curconfig → only_bits (curconfig@[〈s0,false〉]) → 
@@ -325,7 +322,7 @@ qed.
 
 *)
 
-lemma sem_exec_move : Realize ? exec_move R_exec_move.
+lemma sem_exec_action : Realize ? exec_action R_exec_action.
 #intape
 cases (sem_seq … sem_init_copy
         (sem_seq … sem_copy
@@ -344,7 +341,7 @@ lapply (Hta (〈c0,false〉::curconfig) table1 s0 ls s1
 | #Hta * #tb * whd in ⊢ (%→?); #Htb
   lapply (Htb (〈grid,false〉::ls) s0 s1 c0 c1 (〈mv,false〉::table2@〈grid,false〉::rs) newconfig (〈comma,false〉::reverse ? table1) curconfig Hta ????????) -Htb
   [9:|*:(* bit_or_null c0,c1; |curconfig| = |newconfig|*) @daemon ]
-  #Htb * #tc * whd in ⊢ (%→?); #Htc lapply (Htc … Htb) -Htc whd in ⊢(???(??%%%)→?);#Htc
+  #Htb * #tc * whd in ⊢ (%→?); * #_ #Htc lapply (Htc … Htb) -Htc whd in ⊢(???(??%%%)→?);#Htc
   whd in ⊢ (%→?); #Houtc whd in Htc:(???%); whd in Htc:(???(??%%%));
   lapply (Houtc rs n 
     (〈comma,false〉::〈c1,false〉::reverse ? newconfig@〈s1,false〉::〈comma,false〉::reverse ? table1)
@@ -447,7 +444,7 @@ if is_false(current) (* current state is not final *)
     match_tuple;
     if is_marked(current) = false (* match ok *)
       then 
-           exec_move
+           exec_action
            move_r;
       else sink;
    else nop;
@@ -455,89 +452,241 @@ if is_false(current) (* current state is not final *)
 
 definition uni_step ≝ 
   ifTM ? (test_char STape (λc.\fst c == bit false))
-    (single_finalTM ? (seq ? init_match
-      (seq ? match_tuple
+    (single_finalTM ? 
+      (init_match · match_tuple ·
         (ifTM ? (test_char ? (λc.¬is_marked ? c))
-          (seq ? exec_move (move_r …))
-          (nop ?) (* sink *)
-          tc_true))))
-    (nop ?)
-    tc_true.
+          (exec_action · move_r …)
+          (nop ?) tc_true)))
+    (nop ?) tc_true.
 
 definition R_uni_step_true ≝ λt1,t2.
-  ∀n,t0,table,s0,s1,c0,c1,ls,rs,curconfig,newconfig,mv.
-  table_TM (S n) (〈t0,false〉::table) → 
+  ∀n,table,s0,s1,c0,c1,ls,rs,curconfig,newconfig,mv.
+  0 < |table| → table_TM (S n) table → 
   match_in_table (S n) (〈s0,false〉::curconfig) 〈c0,false〉
-    (〈s1,false〉::newconfig) 〈c1,false〉 〈mv,false〉 (〈t0,false〉::table) → 
+    (〈s1,false〉::newconfig) 〈c1,false〉 〈mv,false〉 table → 
   legal_tape ls 〈c0,false〉 rs → 
   t1 = midtape STape (〈grid,false〉::ls) 〈s0,false〉 
-    (curconfig@〈c0,false〉::〈grid,false〉::〈t0,false〉::table@〈grid,false〉::rs) → 
+    (curconfig@〈c0,false〉::〈grid,false〉::table@〈grid,false〉::rs) → 
   ∀t1'.t1' = lift_tape ls 〈c0,false〉 rs → 
   s0 = bit false ∧
   ∃ls1,rs1,c2.
   (t2 = midtape STape (〈grid,false〉::ls1) 〈s1,false〉 
-    (newconfig@〈c2,false〉::〈grid,false〉::〈t0,false〉::table@〈grid,false〉::rs1) ∧
+    (newconfig@〈c2,false〉::〈grid,false〉::table@〈grid,false〉::rs1) ∧
    lift_tape ls1 〈c2,false〉 rs1 = 
    tape_move STape t1' (map_move c1 mv) ∧ legal_tape ls1 〈c2,false〉 rs1).
    
 definition R_uni_step_false ≝ λt1,t2.
   ∀b. current STape t1 = Some ? 〈bit b,false〉 → b = true ∧ t2 = t1.
   
-axiom sem_match_tuple : Realize ? match_tuple R_match_tuple.
+(*axiom sem_match_tuple : Realize ? match_tuple R_match_tuple.*)
+
+definition us_acc : states ? uni_step ≝ (inr … (inl … (inr … start_nop))).
 
+definition Pre_uni_step ≝ λt1.
+  ∃n,table,s0,s1,c0,c1,ls,rs,curconfig,newconfig,mv.
+  0 < |table| ∧ table_TM (S n) table ∧
+  match_in_table (S n) (〈s0,false〉::curconfig) 〈c0,false〉
+    (〈s1,false〉::newconfig) 〈c1,false〉 〈mv,false〉 table ∧
+  legal_tape ls 〈c0,false〉 rs ∧
+  t1 = midtape STape (〈grid,false〉::ls) 〈s0,false〉 
+    (curconfig@〈c0,false〉::〈grid,false〉::table@〈grid,false〉::rs).
+    
 lemma sem_uni_step :
-  accRealize ? uni_step (inr … (inl … (inr … start_nop)))
+  accGRealize ? uni_step us_acc Pre_uni_step
      R_uni_step_true R_uni_step_false. 
+@(acc_sem_if_app_guarded STape … (sem_test_char ? (λc:STape.\fst c == bit false)) 
+  ? (test_char_inv …) (sem_nop …) …)
+[| @(sem_seq_app_guarded … (Realize_to_GRealize … sem_init_match) ???)
+  [ 5: @sub_reflexive
+  | 3: @(sem_seq_app_guarded … sem_match_tuple 
+         (Realize_to_GRealize … (sem_if ????????? (sem_test_char …  (λc.¬is_marked FSUnialpha c))
+          (sem_seq … sem_exec_action (sem_move_r …))
+          (sem_nop …))))
+     [@(λx.True)
+     |//
+     |@sub_reflexive]
+  ||| #t1 #t2 * #n * #table * #s0 * #s1 * #c0 * #c1 * #ls * #rs * #curconfig 
+      * #newconfig * #mv * * * *
+      #Hlen1 #Htable #Hmatch #Hlegal #Ht1
+      whd in ⊢ (%→?);
+      cut (∃tup,table0.table = tup@table0 ∧ tuple_TM (S n) tup)
+      [@daemon]
+      * #tup * #table0 * #Htableeq * #qin * #cin * #qout * #cout * #mv0
+      * * * * * * * * * *
+      #Hqinnomarks #_ #Hqinbits #_ #_ #_ #_ #_ #Hqinlen #_ #Htupeq
+      cut (∃d,qin0.qin = 〈d,false〉::qin0)
+      [ lapply Hqinlen lapply Hqinnomarks -Hqinlen -Hqinnomarks cases qin
+        [ #_ normalize in ⊢ (%→?); #Hfalse destruct (Hfalse) 
+        | * #d #bd #qin0 #Hqinnomarks #_ %{d} %{qin0}
+          >(?:bd=false) [%]
+          @(Hqinnomarks 〈d,bd〉) @memb_hd ] ]
+      * #d * #qin0 #Hqineq
+      #Ht2 
+      lapply (Ht2 (〈grid,false〉::ls) (curconfig@[〈c0,false〉])
+               (qin0@〈cin,false〉::〈comma,false〉::qout@〈cout,false〉::〈comma,false〉::〈mv0,false〉::table0@〈grid,false〉::rs) s0 d ???)
+      [ >Ht1 @eq_f >associative_append @eq_f @eq_f @eq_f
+        >Htableeq >Htupeq >associative_append whd in ⊢ (??%?);
+        @eq_f >Hqineq >associative_append @eq_f whd in ⊢ (??%?);
+        @eq_f whd in ⊢ (??%?); @eq_f
+        >associative_append %
+      | @daemon
+      | @daemon
+      ]
+      #Ht2 % [| % [| % [| % [ @Ht2 ]
+        %2
+        (* ls0 = ls
+           c = s0
+           l1 = curconfig@[〈c0,false〉]
+           l2 = [〈bar,false〉]
+           c10 = d
+           l3 = qin0@[〈cin,false〉]
+           l4 = qout@〈cout,false〉::〈comma,false〉::〈mv0,false〉::table0
+           rs00 = rs
+           n0 = S n ?
+         *)
+        %{ls} %{s0} %{(curconfig@[〈c0,false〉])}
+        %{([〈bar,false〉])} %{d} %{(qin0@[〈cin,false〉])}
+        %{(qout@〈cout,false〉::〈comma,false〉::〈mv0,false〉::table0)}
+        %{rs} %{n} @daemon (* TODO *)
+      ]
+     ]
+    ]
+   ]
+ | #intape #outtape 
+  #ta whd in ⊢ (%→?); #Hta #HR
+  #n #fulltable #s0 #s1 #c0 #c1 #ls #rs #curconfig #newconfig #mv
+  #Htable_len cut (∃t0,table. fulltable =〈bar,false〉::〈t0,false〉::table) [(* 0 < |table| *) @daemon]
+  * #t0 * #table #Hfulltable >Hfulltable -fulltable 
+  #Htable #Hmatch #Htape #Hintape #t1' #Ht1'
+  >Hintape in Hta; * * * #c #bc *
+  whd in ⊢ (??%?→?); #HSome destruct (HSome) #Hc #Hta % [@(\P Hc)]
+  cases HR -HR 
+  #tb * whd in ⊢ (%→?); #Htb
+  lapply (Htb (〈grid,false〉::ls) (curconfig@[〈c0,false〉]) (table@〈grid,false〉::rs) c t0 ???)
+  [ >Hta >associative_append %
+  | @daemon
+  | @daemon
+  | -Hta -Htb #Htb * 
+    #tc * whd in ⊢ (%→?); #Htc cases (Htc … Htable … Htb) -Htb -Htc
+    [| * #Hcurrent #Hfalse @False_ind
+      (* absurd by Hmatch *) @daemon
+    | >(\P Hc) %
+    | (* Htable (con lemma) *) @daemon
+    | (* Hmatch *) @daemon
+    | (* Htable *) @daemon
+    | (* Htable, Hmatch → |config| = n 
+       necessaria modifica in R_match_tuple, le dimensioni non corrispondono
+      *) @daemon
+    ]
+    * #table1 * #newc * #mv1 * #table2 * #Htableeq #Htc *
+    [ * #td * whd in ⊢ (%→?); >Htc -Htc * * #c2 * whd in ⊢ (??%?→?); #Hc2 destruct (Hc2) 
+      #_ #Htd
+      cut (newc = 〈s1,false〉::newconfig@[〈c1,false〉]) [@daemon] #Hnewc
+      >Hnewc cut (mv1 = 〈mv,false〉)
+      [@daemon] #Hmv1
+      * #te * whd in ⊢ (%→?); #Hte
+      cut (td = midtape STape (〈c0,false〉::reverse STape curconfig@〈c,false〉::〈grid,false〉::ls) 
+              〈grid,false〉
+              ((table1@〈bar,false〉::〈c,false〉::curconfig@[〈c0,false〉])@〈comma,true〉::〈s1,false〉::
+               newconfig@〈c1,false〉::〈comma,false〉::〈mv,false〉::table2@〈grid,false〉::rs))
+      [ >Htd @eq_f3 //
+        [ >reverse_append >reverse_single %
+        | >associative_append >associative_append normalize
+          >associative_append >Hmv1 >Hnewc @eq_f @eq_f @eq_f @eq_f @eq_f @eq_f
+          whd in ⊢ (??%?); >associative_append % 
+        ]
+      ]
+      -Htd #Htd lapply (Hte … (S n) … Htd … Ht1') -Htd -Hte
+      [ //
+      | (*|curconfig| = |newconfig|*) @daemon
+      | (* Htable → bit_or_null c1 = true *) @daemon
+      | (* only_bits (〈s1,false〉::newconfig) *) @daemon
+      | (* only_bits (curconfig@[〈s0,false〉]) *) @daemon
+      | (* no_marks (reverse ? curconfig) *) @daemon
+      | >Hmv1 in Htableeq; >Hnewc 
+        >associative_append >associative_append normalize
+        >associative_append >associative_append
+        #Htableeq <Htableeq // ]
+      * #ls1 * #rs1 * #c2 * * #Hte #Hliftte #Hlegalte
+      whd in ⊢ (%→?); * #_ #Houttape lapply (Houttape … Hte) -Houttape #Houttape
+      whd in Houttape:(???%); whd in Houttape:(???(??%%%));
+      @ex_intro [| @(ex_intro ?? rs1) @ex_intro [| % [ % 
+      [ >Houttape @eq_f @eq_f @eq_f @eq_f
+        change with ((〈bar,false〉::〈t0,false〉::table)@?) in ⊢ (???%);
+        >Htableeq >associative_append >associative_append 
+        >associative_append normalize >associative_append
+        >associative_append normalize >Hnewc <Hmv1
+        >associative_append normalize >associative_append
+        >Hmv1 % 
+      | @Hliftte
+      ]
+     | //
+     ]
+    ]
+   ] 
+  | * #td * whd in ⊢ (%→%→?); >Htc * #Htd
+    lapply (Htd ? (refl ??)) normalize in ⊢ (%→?);
+    #Hfalse destruct (Hfalse)
+  ]
+ ]
+| #t1 #t2 #t3 whd in ⊢ (%→%→?); #Ht1 #Ht2
+  #b #Hb >Hb in Ht1; * #Hc #Ht1 lapply (Hc ? (refl ??)) -Hc #Hb' %
+  // cases b in Hb'; normalize #H1 //
+]
+qed.
+
+(*
 @(acc_sem_if_app STape … (sem_test_char ? (λc:STape.\fst c == bit false))
    (sem_seq … sem_init_match      
      (sem_seq … sem_match_tuple        
        (sem_if … (* ????????? (sem_test_char …  (λc.¬is_marked FSUnialpha c)) *)
-          (sem_seq … sem_exec_move (sem_move_r …))
+          (sem_seq … sem_exec_action (sem_move_r …))
           (sem_nop …))))
    (sem_nop …)
    …)
 [@sem_test_char||]
 [ #intape #outtape 
   #ta whd in ⊢ (%→?); #Hta #HR
-  #n #t0 #table #s0 #s1 #c0 #c1 #ls #rs #curconfig #newconfig #mv
+  #n #fulltable #s0 #s1 #c0 #c1 #ls #rs #curconfig #newconfig #mv
+  #Htable_len cut (∃t0,table. fulltable =〈bar,false〉::〈t0,false〉::table) [(* 0 < |table| *) @daemon]
+  * #t0 * #table #Hfulltable >Hfulltable -fulltable 
   #Htable #Hmatch #Htape #Hintape #t1' #Ht1'
-  >Hintape in Hta; #Hta cases (Hta ? (refl ??)) -Hta 
-  #Hs0 lapply (\P Hs0) -Hs0 #Hs0 #Hta % //
+  >Hintape in Hta; * * * #c #bc *
+  whd in ⊢ (??%?→?); #HSome destruct (HSome) #Hc #Hta % [@(\P Hc)]
   cases HR -HR 
-  #tb * whd in ⊢ (%→?); #Htb 
-  lapply (Htb (〈grid,false〉::ls) (curconfig@[〈c0,false〉]) (table@〈grid,false〉::rs) s0 t0 ???)
+  #tb * whd in ⊢ (%→?); #Htb
+  lapply (Htb (〈grid,false〉::ls) (curconfig@[〈c0,false〉]) (table@〈grid,false〉::rs) c t0 ???)
   [ >Hta >associative_append %
-  | (* utilizzare Hmatch
-         cases (match_in_table_to_tuple … Hmatch Htable)
-       ma serve l'iniettività di mk_tuple...
-     *) @daemon
-  | (* idem *) @daemon
+  | @daemon
+  | @daemon
   | -Hta -Htb #Htb * 
     #tc * whd in ⊢ (%→?); #Htc cases (Htc … Htable … Htb) -Htb -Htc
     [| * #Hcurrent #Hfalse @False_ind
       (* absurd by Hmatch *) @daemon
-    | >Hs0 %
-    | (* da decidere se aggiungere un'assunzione o utilizzare Hmatch *) @daemon
+    | >(\P Hc) %
+    | (* Htable (con lemma) *) @daemon
+    | (* Hmatch *) @daemon
     | (* Htable *) @daemon
     | (* Htable, Hmatch → |config| = n 
        necessaria modifica in R_match_tuple, le dimensioni non corrispondono
-      *) @daemon ]
+      *) @daemon
+    ]
     * #table1 * #newc * #mv1 * #table2 * #Htableeq #Htc *
-    [ * #td * whd in ⊢ (%→?); >Htc -Htc #Htd
-      cases (Htd ? (refl ??)) #_ -Htd
+    [ * #td * whd in ⊢ (%→?); >Htc -Htc * * #c2 * whd in ⊢ (??%?→?); #Hc2 destruct (Hc2) 
+      #_ #Htd
       cut (newc = 〈s1,false〉::newconfig@[〈c1,false〉]) [@daemon] #Hnewc
-      >Hnewc #Htd 
-      cut (mv1 = 〈\fst mv1,false〉)
-      [ >(eq_pair_fst_snd … mv1) @eq_f (*Htable, Htableeq*) @daemon ] #Hmv1
+      >Hnewc cut (mv1 = 〈mv,false〉)
+      [@daemon] #Hmv1
       * #te * whd in ⊢ (%→?); #Hte
-      cut (td = midtape STape (〈c0,false〉::reverse STape curconfig@〈s0,false〉::〈grid,false〉::ls) 
+      cut (td = midtape STape (〈c0,false〉::reverse STape curconfig@〈c,false〉::〈grid,false〉::ls) 
               〈grid,false〉
-              ((table1@〈s0,false〉::curconfig@[〈c0,false〉])@〈comma,true〉::〈s1,false〉::
-               newconfig@〈c1,false〉::〈comma,false〉::〈\fst mv1,false〉::table2@〈grid,false〉::rs))
+              ((table1@〈bar,false〉::〈c,false〉::curconfig@[〈c0,false〉])@〈comma,true〉::〈s1,false〉::
+               newconfig@〈c1,false〉::〈comma,false〉::〈mv,false〉::table2@〈grid,false〉::rs))
       [ >Htd @eq_f3 //
         [ >reverse_append >reverse_single %
         | >associative_append >associative_append normalize
-          >associative_append >associative_append <Hmv1 %
+          >associative_append >Hmv1 >Hnewc @eq_f @eq_f @eq_f @eq_f @eq_f @eq_f
+          whd in ⊢ (??%?); >associative_append % 
         ]
       ]
       -Htd #Htd lapply (Hte … (S n) … Htd … Ht1') -Htd -Hte
@@ -547,34 +696,35 @@ lemma sem_uni_step :
       | (* only_bits (〈s1,false〉::newconfig) *) @daemon
       | (* only_bits (curconfig@[〈s0,false〉]) *) @daemon
       | (* no_marks (reverse ? curconfig) *) @daemon
-      | <Hmv1 >Hnewc in Htableeq; 
+      | >Hmv1 in Htableeq; >Hnewc 
         >associative_append >associative_append normalize
         >associative_append >associative_append
         #Htableeq <Htableeq // ]
       * #ls1 * #rs1 * #c2 * * #Hte #Hliftte #Hlegalte
-      whd in ⊢ (%→?); #Houttape lapply (Houttape … Hte) -Houttape #Houttape
+      whd in ⊢ (%→?); * #_ #Houttape lapply (Houttape … Hte) -Houttape #Houttape
       whd in Houttape:(???%); whd in Houttape:(???(??%%%));
       @ex_intro [| @(ex_intro ?? rs1) @ex_intro [| % [ % 
       [ >Houttape @eq_f @eq_f @eq_f @eq_f
-        change with ((〈t0,false〉::table)@?) in ⊢ (???%);
+        change with ((〈bar,false〉::〈t0,false〉::table)@?) in ⊢ (???%);
         >Htableeq >associative_append >associative_append 
         >associative_append normalize >associative_append
         >associative_append normalize >Hnewc <Hmv1
-        >associative_append normalize >associative_append % 
-      | >(?: mv = \fst mv1) [| (*Hmatch, Htableeq*) @daemon ]
-        @Hliftte
+        >associative_append normalize >associative_append
+        >Hmv1 % 
+      | @Hliftte
       ]
      | //
      ]
     ]
    ] 
-  | * #td * whd in ⊢ (%→%→?); >Htc #Htd
-    cases (Htd ? (refl ??)) normalize in ⊢ (%→?);
+  | * #td * whd in ⊢ (%→%→?); >Htc * #Htd
+    lapply (Htd ? (refl ??)) normalize in ⊢ (%→?);
     #Hfalse destruct (Hfalse)
   ]
  ]
 | #t1 #t2 #t3 whd in ⊢ (%→%→?); #Ht1 #Ht2
-  #b #Hb cases (Ht1 ? Hb) #Hb' #Ht3 >Ht2 % //
-  cases b in Hb'; normalize #H1 //
+  #b #Hb >Hb in Ht1; * #Hc #Ht1 lapply (Hc ? (refl ??)) -Hc #Hb' %
+  // cases b in Hb'; normalize #H1 //
 ]
 qed.
+*)
\ No newline at end of file