V_____________________________________________________________*)
-include "turing/universal/tuples.ma".
+include "turing/universal/marks.ma".
definition copy_step_subcase ≝
λalpha,c,elseM.ifTM ? (test_char ? (λx.x == 〈c,true〉))
HelseM intape)
#k * #outc * #Hloop #HR %{k} %{outc} % [@Hloop] -Hloop
#a #l1 #x0 #a0 #l2 #x #l3 #Hintape #Hl1marks cases HR -HR
-[ * #ta * whd in ⊢ (%→?); >Hintape #Hta cases (Hta … (refl ??)) -Hta #Hx #Hta
- * #tb * whd in ⊢ (%→?); #Htb lapply (Htb … Hta) -Hta -Htb #Htb
- * #tc * whd in ⊢ (%→?); #Htc lapply (Htc … Htb) -Htb -Htc #Htc
- * #td * whd in ⊢ (%→?); #Htd cases (Htd … Htc) -Htd
- [ >Htc * normalize in ⊢ (%→?); #Hfalse destruct (Hfalse) ]
- * #_ #Htd lapply (Htd (l1@[〈a0,false〉]) 〈x0,true〉 l2 ? (refl ??) ?) -Htd
- [ #x1 #Hx1 cases (memb_append … Hx1) -Hx1 #Hx1 [@(Hl1marks ? Hx1)|>(memb_single … Hx1) %]
- | normalize >associative_append % ] #Htd
+[ * #ta * whd in ⊢ (%→?); >Hintape * * #c0 * whd in ⊢ (??%?→?); #Hx #Hc #Hta
+ * #tb * whd in ⊢ (%→?); * #Htb cases (Htb (l1@〈a0,false〉::〈x0,true〉::l2) x) -Htb
+ #Htb lapply (Htb … Hta) -Htb #Htb #_ #_
+ * #tc * whd in ⊢ (%→?); * #_ #Htc lapply (Htc … Htb) -Htb -Htc #Htc
+ * #td * whd in ⊢ (%→?); * #_ #Htd cases (Htd … Htc) -Htd #_ #Htd cases (Htd (refl ??))
+ -Htd #Htd lapply (Htd (l1@[〈a0,false〉]) 〈x0,true〉 l2 ???) //
+ [#x1 #Hx1 cases (memb_append … Hx1) [ @Hl1marks | #Hsingle >(memb_single … Hsingle) % ]
+ |whd in ⊢ (??%?); // ]
+ -Htd #Htd #_
* #te * whd in ⊢ (%→?); #Hte lapply (Hte … Htd) -Hte -Htd -Htc #Hte
- * #tf * whd in ⊢ (%→?); #Htf lapply (Htf … Hte) -Hte -Htf >reverse_append #Htf
- * #tg * whd in ⊢ (%→?); #Htg lapply (Htg … Htf) -Htf -Htg >reverse_single #Htg
- * #th * whd in ⊢ (%→?); #Hth lapply (Hth … Htg) -Htg -Hth
+ * #tf * whd in ⊢ (%→?); * #_ #Htf lapply (Htf … Hte) -Hte -Htf >reverse_append #Htf
+ * #tg * whd in ⊢ (%→?); * #Htg #_ lapply (Htg … Htf) -Htf -Htg >reverse_single #Htg
+ * #th * whd in ⊢ (%→?); * #_ #Hth lapply (Hth … Htg) -Htg -Hth
generalize in match Hl1marks; -Hl1marks @(list_elim_left … l1)
- [ #Hl1marks #Hth whd in ⊢ (%→?); #Houtc cases (Houtc … Hth) -Houtc
+ [ #Hl1marks #Hth whd in ⊢ (%→?); * #_ #Houtc cases (Houtc … Hth) -Houtc
[ * normalize in ⊢ (%→?); #Hfalse destruct (Hfalse) ]
- * #_ #Houtc lapply (Houtc [] ?? (refl ??) (refl ??) Hl1marks) -Houtc
- #Houtc lapply (\P Hx) -Hx #Hx destruct (Hx) % % [%] @Houtc
+ * * #_ #Houtc #_ lapply (Houtc [] ?? (refl ??) (refl ??) Hl1marks) -Houtc
+ #Houtc % >(\P Hc) in Hx; #Hx destruct (Hx) % // @Houtc
| -l1 #c1 #l1 #_ #Hl1marks >reverse_append >reverse_single
#Hth whd in ⊢ (%→?); #Houtc cases (Houtc … Hth) -Houtc
[ * >Hl1marks [ #Hfalse destruct (Hfalse) ] @memb_append_l2 @memb_hd ]
* #_ #Houtc lapply (Houtc (reverse ? l1@[〈x,false〉]) 〈a,true〉 l3 ? (refl ??) ?) -Houtc
- [ #x1 #Hx1 cases (memb_append … Hx1) -Hx1 #Hx1 [ @Hl1marks @memb_append_l1 @daemon | >(memb_single … Hx1) % ]
+ [ #x1 #Hx1 cases (memb_append … Hx1) -Hx1 #Hx1
+ [@Hl1marks @memb_append_l1 <(reverse_reverse … l1) @memb_reverse @Hx1
+ |>(memb_single … Hx1) % ]
| normalize >associative_append % ]
#Houtc lapply (\P Hx) -Hx #Hx destruct (Hx) % % [%] >Houtc
>reverse_append >reverse_reverse >associative_append >associative_append % ]
#Hth whd in ⊢ (%→?); #Houtc cases (Houtc … Hth) -Houtc
[ * >Hl1marks [ #Hfalse destruct (Hfalse) ] @memb_append_l2 @memb_hd ]
* #_ #Houtc lapply (Houtc (reverse ? l1@[〈x,false〉]) 〈a,true〉 l3 ? (refl ??) ?) -Houtc
- [ #x1 #Hx1 cases (memb_append … Hx1) -Hx1 #Hx1 [ @Hl1marks @memb_append_l1 @daemon | >(memb_single … Hx1) % ]
+ [ #x1 #Hx1 cases (memb_append … Hx1) -Hx1 #Hx1
+ [@Hl1marks @memb_append_l1 <(reverse_reverse … l1) @memb_reverse @Hx1
+ |>(memb_single … Hx1) % ]
| normalize >associative_append % ]
#Houtc lapply (\P Hx) -Hx #Hx destruct (Hx) % % [%] >Houtc
>reverse_append >reverse_reverse >associative_append >associative_append % ]
>reverse_append >reverse_append normalize #H1 destruct %
qed.
+axiom daemon : ∀P:Prop.P.
+
lemma wsem_copy0 : WRealize ? copy0 R_copy0.
#intape #k #outc #Hloop
lapply (sem_while … sem_copy_step intape k outc Hloop) [%] -Hloop
#Hl1 #Hl1bits #l4' #bg #Hl4 #Hl4bits %2
cases (Htc … Htb) -Htc #Hcbitnull #Htc
% [ % #Hc' >Hc' in Hcbitnull; normalize #Hfalse destruct (Hfalse) ]
- cut (|l1| = |reverse ? l4|) [@daemon] #Hlen1
+ cut (|l1| = |reverse ? l4|) [>length_reverse @Hlen] #Hlen1
@(list_cases2 … Hlen1)
[ (* case l1 = [] is discriminated because l1 contains at least comma *)
#Hl1nil @False_ind >Hl1nil in Hl1; cases l1' normalize