[ None ⇒ 〈parmove2,null_action ? n〉
| Some a1 ⇒ 〈parmove1,change_vec ? (S n)
(change_vec ?(S n)
- (null_action ? n) (〈Some ? a0,D〉) src)
- (〈Some ? a1,D〉) dst〉 ] ]
+ (null_action ? n) (〈None sig,D〉) src)
+ (〈None ?,D〉) dst〉 ] ]
| S q ⇒ match q with
[ O ⇒ (* 1 *) 〈parmove1,null_action ? n〉
| S _ ⇒ (* 2 *) 〈parmove2,null_action ? n〉 ] ].
is_sep x1 = false ∧
outt = change_vec ??
(change_vec ?? int
- (tape_move ? (tape_write ? (nth src ? int (niltape ?)) (Some ? x1)) D) src)
- (tape_move ? (tape_write ? (nth dst ? int (niltape ?)) (Some ? x2)) D) dst.
+ (tape_move_mono ? (nth src ? int (niltape ?)) (〈None ?,D〉)) src)
+ (tape_move_mono ? (nth dst ? int (niltape ?)) (〈None ?,D〉)) dst.
definition R_parmove_step_false ≝
λsrc,dst:nat.λsig,n,is_sep.λint,outt: Vector (tape sig) (S n).
whd in ⊢ (??(????(???%))?); >Hsep >Hcurdst @tape_move_null_action ]
qed.
-axiom parmove_q0_q1 :
+lemma parmove_q0_q1 :
∀src,dst,sig,n,D,is_sep,v.src ≠ dst → src < S n → dst < S n →
∀a1,a2.
nth src ? (current_chars ?? v) (None ?) = Some ? a1 →
mk_mconfig ??? parmove1
(change_vec ? (S n)
(change_vec ?? v
- (tape_move ? (tape_write ? (nth src ? v (niltape ?)) (Some ? a1)) D) src)
- (tape_move ? (tape_write ? (nth dst ? v (niltape ?)) (Some ? a2)) D) dst).
-(*
+ (tape_move_mono ? (nth src ? v (niltape ?)) (〈None ?, D〉)) src)
+ (tape_move_mono ? (nth dst ? v (niltape ?)) (〈None ?, D〉)) dst).
#src #dst #sig #n #D #is_sep #v #Hneq #Hsrc #Hdst
#a1 #a2 #Hcursrc #Hcurdst #Hsep
whd in ⊢ (??%?); >(eq_pair_fst_snd … (trans ????)) whd in ⊢ (??%?); @eq_f2
>Hcursrc >Hcurdst whd in ⊢ (??(???%)?); >Hsep //
| whd in match (trans ????);
>Hcursrc >Hcurdst whd in ⊢ (??(????(???%))?); >Hsep whd in ⊢ (??(????(???%))?);
- change with (pmap_vec ???????) in ⊢ (??%?);
- whd in match (vec_map ?????);
- >pmap_change >pmap_change >tape_move_null_action
+ <(change_vec_same ?? v dst (niltape ?)) in ⊢ (??%?);
+ >tape_move_multi_def >pmap_change
+ <(change_vec_same ?? v src (niltape ?)) in ⊢ (??%?);
+ >pmap_change <tape_move_multi_def >tape_move_null_action
@eq_f2 // @eq_f2 // >nth_change_vec_neq //
]
qed.
-*)
lemma sem_parmove_step :
∀src,dst,sig,n,D,is_sep.src ≠ dst → src < S n → dst < S n →
[ #Hcursrc %{2} %
[| % [ %
[ whd in ⊢ (??%?); >parmove_q0_q2_null_src /2/
- <(nth_vec_map ?? (current …) src ? int (niltape ?)) //
| normalize in ⊢ (%→?); #H destruct (H) ]
| #_ % // % %2 // ] ]
| #a #Ha cases (true_or_false (is_sep a)) #Hsep
[ %{2} %
[| % [ %
[ whd in ⊢ (??%?); >(parmove_q0_q2_sep … Hsep) /2/
- <(nth_vec_map ?? (current …) src ? int (niltape ?)) //
| normalize in ⊢ (%→?); #H destruct (H) ]
| #_ % // % % %{a} % // ] ]
| lapply (refl ? (current ? (nth dst ? int (niltape ?))))
[ #Hcurdst %{2} %
[| % [ %
[ whd in ⊢ (??%?); >(parmove_q0_q2_null_dst … Hsep) /2/
- [ <(nth_vec_map ?? (current …) dst ? int (niltape ?)) //
- | <(nth_vec_map ?? (current …) src ? int (niltape ?)) // ]
| normalize in ⊢ (%→?); #H destruct (H) ]
| #_ % // %2 // ] ]
| #b #Hb %{2} %
[| % [ %
[whd in ⊢ (??%?); >(parmove_q0_q1 … Hneq Hsrc Hdst ? b ?? Hsep) //
- [ <(nth_vec_map ?? (current …) dst ? int (niltape ?)) //
- | <(nth_vec_map ?? (current …) src ? int (niltape ?)) // ]
| #_ %{a} %{b} % // % // % // ]
| * #H @False_ind @H % ]
]]]]
#i #Hi cases (decidable_eq_nat i src) #Hisrc
[ >Hisrc >(nth_change_vec_neq … src dst) [|@(sym_not_eq … Hneq)]
>nth_change_vec //
- >(nth_change_vec_neq … src dst) [|@(sym_not_eq … Hneq)]
- >nth_change_vec //
| cases (decidable_eq_nat i dst) #Hidst
- [ >Hidst >nth_change_vec // >nth_change_vec //
- >Hdst_tc in Hc1; >Htargetnil
- normalize in ⊢ (%→?); #Hc1 destruct (Hc1) %
+ [ >Hidst >nth_change_vec //
| >nth_change_vec_neq [|@(sym_not_eq … Hidst)]
- >nth_change_vec_neq [|@(sym_not_eq … Hisrc)]
- >nth_change_vec_neq [|@(sym_not_eq … Hidst)]
>nth_change_vec_neq [|@(sym_not_eq … Hisrc)] %
]
]
>change_vec_change_vec
>reverse_cons >associative_append
>reverse_cons >associative_append %
- | >Hd >nth_change_vec // >Hdst_tc >Htarget >Hdst_tc in Hc1;
- normalize in ⊢ (%→?); #H destruct (H) //
+ | >Hd >nth_change_vec //
| >Hxs in Hlen; >Htarget normalize #Hlen destruct (Hlen) //
| <Hxs #c1 #Hc1 @Hnosep @memb_cons //
| >Hd >nth_change_vec_neq [|@sym_not_eq //]