paulson@5252
|
1 |
(* Title: HOL/UNITY/Union.ML
|
paulson@5252
|
2 |
ID: $Id$
|
paulson@5252
|
3 |
Author: Lawrence C Paulson, Cambridge University Computer Laboratory
|
paulson@5252
|
4 |
Copyright 1998 University of Cambridge
|
paulson@5252
|
5 |
|
paulson@5252
|
6 |
Unions of programs
|
paulson@5252
|
7 |
|
paulson@5252
|
8 |
From Misra's Chapter 5: Asynchronous Compositions of Programs
|
paulson@5252
|
9 |
*)
|
paulson@5252
|
10 |
|
paulson@6012
|
11 |
Addcongs [UN_cong, INT_cong];
|
paulson@5252
|
12 |
|
paulson@6295
|
13 |
|
paulson@5867
|
14 |
(** SKIP **)
|
paulson@5867
|
15 |
|
paulson@6295
|
16 |
Goal "Init SKIP = UNIV";
|
paulson@5648
|
17 |
by (simp_tac (simpset() addsimps [SKIP_def]) 1);
|
paulson@5611
|
18 |
qed "Init_SKIP";
|
paulson@5611
|
19 |
|
paulson@6295
|
20 |
Goal "Acts SKIP = {Id}";
|
paulson@5648
|
21 |
by (simp_tac (simpset() addsimps [SKIP_def]) 1);
|
paulson@5648
|
22 |
qed "Acts_SKIP";
|
paulson@5648
|
23 |
|
paulson@6295
|
24 |
Addsimps [Init_SKIP, Acts_SKIP];
|
paulson@5648
|
25 |
|
paulson@6295
|
26 |
Goal "reachable SKIP = UNIV";
|
paulson@6012
|
27 |
by (force_tac (claset() addEs [reachable.induct]
|
paulson@6012
|
28 |
addIs reachable.intrs, simpset()) 1);
|
paulson@5867
|
29 |
qed "reachable_SKIP";
|
paulson@5867
|
30 |
|
paulson@5867
|
31 |
Addsimps [reachable_SKIP];
|
paulson@5867
|
32 |
|
paulson@6836
|
33 |
(** SKIP and safety properties **)
|
paulson@6836
|
34 |
|
paulson@6836
|
35 |
Goalw [constrains_def] "(SKIP : A co B) = (A<=B)";
|
paulson@6836
|
36 |
by Auto_tac;
|
paulson@6836
|
37 |
qed "SKIP_in_constrains_iff";
|
paulson@6836
|
38 |
AddIffs [SKIP_in_constrains_iff];
|
paulson@6836
|
39 |
|
paulson@6836
|
40 |
Goalw [Constrains_def] "(SKIP : A Co B) = (A<=B)";
|
paulson@6836
|
41 |
by Auto_tac;
|
paulson@6836
|
42 |
qed "SKIP_in_Constrains_iff";
|
paulson@6836
|
43 |
AddIffs [SKIP_in_Constrains_iff];
|
paulson@6836
|
44 |
|
paulson@6836
|
45 |
Goalw [stable_def] "SKIP : stable A";
|
paulson@6836
|
46 |
by Auto_tac;
|
paulson@6836
|
47 |
qed "SKIP_in_stable";
|
paulson@6836
|
48 |
AddIffs [SKIP_in_stable, SKIP_in_stable RS stable_imp_Stable];
|
paulson@6836
|
49 |
|
paulson@5867
|
50 |
|
paulson@6012
|
51 |
(** Join **)
|
paulson@6012
|
52 |
|
paulson@6295
|
53 |
Goal "Init (F Join G) = Init F Int Init G";
|
paulson@6012
|
54 |
by (simp_tac (simpset() addsimps [Join_def]) 1);
|
paulson@5313
|
55 |
qed "Init_Join";
|
paulson@5252
|
56 |
|
paulson@6295
|
57 |
Goal "Acts (F Join G) = Acts F Un Acts G";
|
paulson@5596
|
58 |
by (auto_tac (claset(), simpset() addsimps [Join_def]));
|
paulson@5313
|
59 |
qed "Acts_Join";
|
paulson@5252
|
60 |
|
paulson@7537
|
61 |
Addsimps [Init_Join, Acts_Join];
|
paulson@6295
|
62 |
|
paulson@6012
|
63 |
|
paulson@6012
|
64 |
(** JN **)
|
paulson@6012
|
65 |
|
paulson@6295
|
66 |
Goalw [JOIN_def, SKIP_def] "(JN i:{}. F i) = SKIP";
|
paulson@6012
|
67 |
by Auto_tac;
|
paulson@6012
|
68 |
qed "JN_empty";
|
paulson@6012
|
69 |
Addsimps [JN_empty];
|
paulson@6012
|
70 |
|
paulson@6633
|
71 |
Goal "(JN i:insert a I. F i) = (F a) Join (JN i:I. F i)";
|
paulson@6295
|
72 |
by (rtac program_equalityI 1);
|
paulson@6295
|
73 |
by (ALLGOALS (simp_tac (simpset() addsimps [JOIN_def, Join_def])));
|
paulson@6295
|
74 |
qed "JN_insert";
|
paulson@6295
|
75 |
Addsimps[JN_empty, JN_insert];
|
paulson@6012
|
76 |
|
paulson@5611
|
77 |
Goal "Init (JN i:I. F i) = (INT i:I. Init (F i))";
|
paulson@6295
|
78 |
by (simp_tac (simpset() addsimps [JOIN_def]) 1);
|
paulson@5313
|
79 |
qed "Init_JN";
|
paulson@5252
|
80 |
|
paulson@6295
|
81 |
Goal "Acts (JN i:I. F i) = insert Id (UN i:I. Acts (F i))";
|
paulson@5596
|
82 |
by (auto_tac (claset(), simpset() addsimps [JOIN_def]));
|
paulson@5313
|
83 |
qed "Acts_JN";
|
paulson@5252
|
84 |
|
paulson@7537
|
85 |
Addsimps [Init_JN, Acts_JN];
|
paulson@5259
|
86 |
|
paulson@6295
|
87 |
val prems = Goalw [JOIN_def]
|
paulson@6633
|
88 |
"[| I=J; !!i. i:J ==> F i = G i |] ==> \
|
paulson@6633
|
89 |
\ (JN i:I. F i) = (JN i:J. G i)";
|
paulson@6295
|
90 |
by (asm_simp_tac (simpset() addsimps prems) 1);
|
paulson@6295
|
91 |
qed "JN_cong";
|
paulson@6012
|
92 |
|
paulson@6295
|
93 |
Addcongs [JN_cong];
|
paulson@5584
|
94 |
|
paulson@5584
|
95 |
|
paulson@5611
|
96 |
(** Algebraic laws **)
|
paulson@5259
|
97 |
|
paulson@5611
|
98 |
Goal "F Join G = G Join F";
|
paulson@5313
|
99 |
by (simp_tac (simpset() addsimps [Join_def, Un_commute, Int_commute]) 1);
|
paulson@5259
|
100 |
qed "Join_commute";
|
paulson@5259
|
101 |
|
paulson@7360
|
102 |
Goal "A Join (B Join C) = B Join (A Join C)";
|
paulson@7360
|
103 |
by (simp_tac (simpset() addsimps Un_ac@Int_ac@[Join_def]) 1);
|
paulson@7360
|
104 |
qed "Join_left_commute";
|
paulson@7360
|
105 |
|
paulson@5611
|
106 |
Goal "(F Join G) Join H = F Join (G Join H)";
|
paulson@6295
|
107 |
by (simp_tac (simpset() addsimps Un_ac@[Join_def, Int_assoc]) 1);
|
paulson@5259
|
108 |
qed "Join_assoc";
|
paulson@5596
|
109 |
|
paulson@6295
|
110 |
Goalw [Join_def, SKIP_def] "SKIP Join F = F";
|
paulson@5611
|
111 |
by (rtac program_equalityI 1);
|
paulson@6295
|
112 |
by (ALLGOALS (simp_tac (simpset() addsimps [insert_absorb])));
|
paulson@5611
|
113 |
qed "Join_SKIP_left";
|
paulson@5584
|
114 |
|
paulson@6295
|
115 |
Goalw [Join_def, SKIP_def] "F Join SKIP = F";
|
paulson@6295
|
116 |
by (rtac program_equalityI 1);
|
paulson@6295
|
117 |
by (ALLGOALS (simp_tac (simpset() addsimps [insert_absorb])));
|
paulson@5611
|
118 |
qed "Join_SKIP_right";
|
paulson@5611
|
119 |
|
paulson@5611
|
120 |
Addsimps [Join_SKIP_left, Join_SKIP_right];
|
paulson@5611
|
121 |
|
paulson@5611
|
122 |
Goalw [Join_def] "F Join F = F";
|
paulson@5611
|
123 |
by (rtac program_equalityI 1);
|
paulson@6295
|
124 |
by Auto_tac;
|
paulson@5313
|
125 |
qed "Join_absorb";
|
paulson@5313
|
126 |
|
paulson@5611
|
127 |
Addsimps [Join_absorb];
|
paulson@5313
|
128 |
|
paulson@7915
|
129 |
Goalw [Join_def] "F Join (F Join G) = F Join G";
|
paulson@7360
|
130 |
by (rtac program_equalityI 1);
|
paulson@7360
|
131 |
by Auto_tac;
|
paulson@7360
|
132 |
qed "Join_left_absorb";
|
paulson@7360
|
133 |
|
paulson@7360
|
134 |
(*Join is an AC-operator*)
|
paulson@7360
|
135 |
val Join_ac = [Join_assoc, Join_left_absorb, Join_commute, Join_left_commute];
|
paulson@6295
|
136 |
|
paulson@6295
|
137 |
|
paulson@6295
|
138 |
(*** JN laws ***)
|
paulson@6295
|
139 |
|
paulson@6633
|
140 |
(*Also follows by JN_insert and insert_absorb, but the proof is longer*)
|
paulson@6633
|
141 |
Goal "k:I ==> F k Join (JN i:I. F i) = (JN i:I. F i)";
|
paulson@7537
|
142 |
by (auto_tac (claset() addSIs [program_equalityI], simpset()));
|
paulson@6295
|
143 |
qed "JN_absorb";
|
paulson@6295
|
144 |
|
paulson@6633
|
145 |
Goal "(JN i: I Un J. F i) = ((JN i: I. F i) Join (JN i:J. F i))";
|
paulson@7537
|
146 |
by (auto_tac (claset() addSIs [program_equalityI], simpset()));
|
paulson@6633
|
147 |
qed "JN_Un";
|
paulson@5970
|
148 |
|
paulson@6836
|
149 |
Goal "(JN i:I. c) = (if I={} then SKIP else c)";
|
paulson@7537
|
150 |
by (auto_tac (claset() addSIs [program_equalityI], simpset()));
|
paulson@5970
|
151 |
qed "JN_constant";
|
paulson@5970
|
152 |
|
paulson@6633
|
153 |
Goal "(JN i:I. F i Join G i) = (JN i:I. F i) Join (JN i:I. G i)";
|
paulson@7537
|
154 |
by (auto_tac (claset() addSIs [program_equalityI], simpset()));
|
paulson@5970
|
155 |
qed "JN_Join_distrib";
|
paulson@5584
|
156 |
|
paulson@6633
|
157 |
Goal "i : I ==> (JN i:I. F i Join G) = ((JN i:I. F i) Join G)";
|
paulson@6633
|
158 |
by (asm_simp_tac (simpset() addsimps [JN_Join_distrib, JN_constant]) 1);
|
paulson@6836
|
159 |
by Auto_tac;
|
paulson@6633
|
160 |
qed "JN_Join_miniscope";
|
paulson@6633
|
161 |
|
paulson@5584
|
162 |
|
paulson@6536
|
163 |
(*** Safety: co, stable, FP ***)
|
paulson@5313
|
164 |
|
paulson@6633
|
165 |
(*Fails if I={} because it collapses to SKIP : A co B*)
|
paulson@6295
|
166 |
Goalw [constrains_def, JOIN_def]
|
paulson@6633
|
167 |
"i : I ==> (JN i:I. F i) : A co B = (ALL i:I. F i : A co B)";
|
paulson@6295
|
168 |
by (Simp_tac 1);
|
paulson@6295
|
169 |
by (Blast_tac 1);
|
paulson@7523
|
170 |
qed "JN_constrains";
|
paulson@6012
|
171 |
|
paulson@6633
|
172 |
Goal "(F Join G : A co B) = (F : A co B & G : A co B)";
|
paulson@6295
|
173 |
by (auto_tac
|
paulson@6295
|
174 |
(claset(),
|
paulson@6295
|
175 |
simpset() addsimps [constrains_def, Join_def]));
|
paulson@7523
|
176 |
qed "Join_constrains";
|
paulson@6012
|
177 |
|
paulson@6633
|
178 |
(*Analogous weak versions FAIL; see Misra [1994] 5.4.1, Substitution Axiom.
|
paulson@6633
|
179 |
reachable (F Join G) could be much bigger than reachable F, reachable G
|
paulson@6633
|
180 |
*)
|
paulson@5313
|
181 |
|
paulson@6295
|
182 |
|
paulson@6536
|
183 |
Goal "[| F : A co A'; G : B co B' |] \
|
paulson@6536
|
184 |
\ ==> F Join G : (A Int B) co (A' Un B')";
|
paulson@7523
|
185 |
by (simp_tac (simpset() addsimps [Join_constrains]) 1);
|
paulson@5313
|
186 |
by (blast_tac (claset() addIs [constrains_weaken]) 1);
|
paulson@7523
|
187 |
qed "Join_constrains_weaken";
|
paulson@5313
|
188 |
|
paulson@6633
|
189 |
Goal "[| ALL i:I. F i : A i co A' i; i: I |] \
|
paulson@6633
|
190 |
\ ==> (JN i:I. F i) : (INT i:I. A i) co (UN i:I. A' i)";
|
paulson@7523
|
191 |
by (asm_simp_tac (simpset() addsimps [JN_constrains]) 1);
|
paulson@6633
|
192 |
by (blast_tac (claset() addIs [constrains_weaken]) 1);
|
paulson@7523
|
193 |
qed "JN_constrains_weaken";
|
paulson@6633
|
194 |
|
paulson@6295
|
195 |
Goal "i : I ==> \
|
paulson@6295
|
196 |
\ (JN i:I. F i) : stable A = (ALL i:I. F i : stable A)";
|
paulson@7523
|
197 |
by (asm_simp_tac (simpset() addsimps [stable_def, JN_constrains]) 1);
|
paulson@7523
|
198 |
qed "JN_stable";
|
paulson@5313
|
199 |
|
paulson@6295
|
200 |
Goal "[| ALL i:I. F i : invariant A; i : I |] \
|
paulson@5970
|
201 |
\ ==> (JN i:I. F i) : invariant A";
|
paulson@7523
|
202 |
by (asm_full_simp_tac (simpset() addsimps [invariant_def, JN_stable]) 1);
|
paulson@5970
|
203 |
by (Blast_tac 1);
|
paulson@5970
|
204 |
bind_thm ("invariant_JN_I", ballI RS result());
|
paulson@5970
|
205 |
|
paulson@7594
|
206 |
Goal "(F Join G : stable A) = \
|
paulson@6295
|
207 |
\ (F : stable A & G : stable A)";
|
paulson@7523
|
208 |
by (simp_tac (simpset() addsimps [stable_def, Join_constrains]) 1);
|
paulson@7523
|
209 |
qed "Join_stable";
|
paulson@5313
|
210 |
|
paulson@7594
|
211 |
Goal "(F Join G : increasing f) = \
|
paulson@7594
|
212 |
\ (F : increasing f & G : increasing f)";
|
paulson@7594
|
213 |
by (simp_tac (simpset() addsimps [increasing_def, Join_stable]) 1);
|
paulson@7594
|
214 |
by (Blast_tac 1);
|
paulson@7594
|
215 |
qed "Join_increasing";
|
paulson@7594
|
216 |
|
paulson@6295
|
217 |
Goal "[| F : invariant A; G : invariant A |] \
|
paulson@5970
|
218 |
\ ==> F Join G : invariant A";
|
paulson@7523
|
219 |
by (full_simp_tac (simpset() addsimps [invariant_def, Join_stable]) 1);
|
paulson@5970
|
220 |
by (Blast_tac 1);
|
paulson@5970
|
221 |
qed "invariant_JoinI";
|
paulson@5970
|
222 |
|
paulson@6295
|
223 |
Goal "i : I ==> FP (JN i:I. F i) = (INT i:I. FP (F i))";
|
paulson@7523
|
224 |
by (asm_simp_tac (simpset() addsimps [FP_def, JN_stable, INTER_def]) 1);
|
paulson@5313
|
225 |
qed "FP_JN";
|
paulson@5313
|
226 |
|
paulson@5313
|
227 |
|
paulson@5313
|
228 |
(*** Progress: transient, ensures ***)
|
paulson@5313
|
229 |
|
paulson@6295
|
230 |
Goal "i : I ==> \
|
paulson@6295
|
231 |
\ (JN i:I. F i) : transient A = (EX i:I. F i : transient A)";
|
paulson@6295
|
232 |
by (auto_tac (claset(),
|
paulson@6295
|
233 |
simpset() addsimps [transient_def, JOIN_def]));
|
paulson@7523
|
234 |
qed "JN_transient";
|
paulson@5313
|
235 |
|
paulson@6295
|
236 |
Goal "F Join G : transient A = \
|
paulson@6295
|
237 |
\ (F : transient A | G : transient A)";
|
paulson@6295
|
238 |
by (auto_tac (claset(),
|
paulson@6295
|
239 |
simpset() addsimps [bex_Un, transient_def,
|
paulson@6295
|
240 |
Join_def]));
|
paulson@7523
|
241 |
qed "Join_transient";
|
paulson@5313
|
242 |
|
paulson@6295
|
243 |
Goal "i : I ==> \
|
paulson@6536
|
244 |
\ (JN i:I. F i) : A ensures B = \
|
paulson@6536
|
245 |
\ ((ALL i:I. F i : (A-B) co (A Un B)) & \
|
paulson@6536
|
246 |
\ (EX i:I. F i : A ensures B))";
|
paulson@5313
|
247 |
by (auto_tac (claset(),
|
paulson@7523
|
248 |
simpset() addsimps [ensures_def, JN_constrains, JN_transient]));
|
paulson@7523
|
249 |
qed "JN_ensures";
|
paulson@5313
|
250 |
|
paulson@5313
|
251 |
Goalw [ensures_def]
|
paulson@6536
|
252 |
"F Join G : A ensures B = \
|
paulson@7630
|
253 |
\ (F : (A-B) co (A Un B) & G : (A-B) co (A Un B) & \
|
paulson@7630
|
254 |
\ (F : transient (A-B) | G : transient (A-B)))";
|
paulson@5313
|
255 |
by (auto_tac (claset(),
|
paulson@7523
|
256 |
simpset() addsimps [Join_constrains, Join_transient]));
|
paulson@7523
|
257 |
qed "Join_ensures";
|
paulson@5313
|
258 |
|
paulson@6295
|
259 |
Goalw [stable_def, constrains_def, Join_def]
|
paulson@6536
|
260 |
"[| F : stable A; G : A co A' |] \
|
paulson@6536
|
261 |
\ ==> F Join G : A co A'";
|
paulson@6295
|
262 |
by (asm_full_simp_tac (simpset() addsimps [ball_Un]) 1);
|
paulson@5313
|
263 |
by (Blast_tac 1);
|
paulson@7523
|
264 |
qed "stable_Join_constrains";
|
paulson@5313
|
265 |
|
paulson@6633
|
266 |
(*Premise for G cannot use Always because F: Stable A is weaker than
|
paulson@5648
|
267 |
G : stable A *)
|
paulson@6570
|
268 |
Goal "[| F : stable A; G : invariant A |] ==> F Join G : Always A";
|
paulson@6570
|
269 |
by (full_simp_tac (simpset() addsimps [Always_def, invariant_def,
|
paulson@7523
|
270 |
Stable_eq_stable, Join_stable]) 1);
|
paulson@5313
|
271 |
by (force_tac(claset() addIs [stable_reachable, stable_Int],
|
paulson@7537
|
272 |
simpset()) 1);
|
paulson@6570
|
273 |
qed "stable_Join_Always";
|
paulson@5313
|
274 |
|
paulson@6536
|
275 |
Goal "[| F : stable A; G : A ensures B |] ==> F Join G : A ensures B";
|
paulson@7523
|
276 |
by (asm_simp_tac (simpset() addsimps [Join_ensures]) 1);
|
paulson@5313
|
277 |
by (asm_full_simp_tac (simpset() addsimps [stable_def, ensures_def]) 1);
|
paulson@5313
|
278 |
by (etac constrains_weaken 1);
|
paulson@5313
|
279 |
by Auto_tac;
|
paulson@7523
|
280 |
qed "stable_Join_ensures1";
|
paulson@5313
|
281 |
|
paulson@5313
|
282 |
(*As above, but exchanging the roles of F and G*)
|
paulson@6536
|
283 |
Goal "[| F : A ensures B; G : stable A |] ==> F Join G : A ensures B";
|
paulson@5313
|
284 |
by (stac Join_commute 1);
|
paulson@7523
|
285 |
by (blast_tac (claset() addIs [stable_Join_ensures1]) 1);
|
paulson@7523
|
286 |
qed "stable_Join_ensures2";
|
paulson@5313
|
287 |
|
paulson@5648
|
288 |
|
paulson@5804
|
289 |
(** Diff and localTo **)
|
paulson@5648
|
290 |
|
paulson@7878
|
291 |
Goalw [Diff_def] "F Join (Diff UNIV G (Acts F)) = F Join G";
|
paulson@5804
|
292 |
by (rtac program_equalityI 1);
|
paulson@6295
|
293 |
by Auto_tac;
|
paulson@5804
|
294 |
qed "Join_Diff2";
|
paulson@5804
|
295 |
|
paulson@7594
|
296 |
Goalw [Diff_def]
|
paulson@7878
|
297 |
"Diff C (F Join G) (Acts H) = (Diff C F (Acts H)) Join (Diff C G (Acts H))";
|
paulson@7594
|
298 |
by (rtac program_equalityI 1);
|
paulson@7594
|
299 |
by Auto_tac;
|
paulson@7594
|
300 |
qed "Diff_Join_distrib";
|
paulson@7594
|
301 |
|
paulson@7878
|
302 |
Goalw [Diff_def] "Diff C F (Acts F) = mk_program(Init F, {})";
|
paulson@7594
|
303 |
by Auto_tac;
|
paulson@7878
|
304 |
qed "Diff_self_eq";
|
paulson@7594
|
305 |
|
paulson@7878
|
306 |
Goalw [Diff_def, Disjoint_def] "Disjoint C F (Diff C G (Acts F))";
|
paulson@7878
|
307 |
by (force_tac (claset(),
|
paulson@7878
|
308 |
simpset() addsimps [Restrict_imageI,
|
paulson@7878
|
309 |
sym RSN (2,Restrict_imageI)]) 1);
|
paulson@5804
|
310 |
qed "Diff_Disjoint";
|
paulson@5804
|
311 |
|
paulson@7878
|
312 |
Goalw [Disjoint_def]
|
paulson@7878
|
313 |
"[| A <= B; Disjoint A F G |] ==> Disjoint B F G";
|
paulson@7878
|
314 |
by (blast_tac (claset() addIs [Restrict_eq_mono RSN (2,Restrict_imageI)]) 1);
|
paulson@7878
|
315 |
qed "Disjoint_mono";
|
paulson@5804
|
316 |
|
paulson@7878
|
317 |
(*** localTo ***)
|
paulson@7878
|
318 |
|
paulson@7878
|
319 |
Goalw [LOCALTO_def, Diff_def, stable_def, constrains_def]
|
paulson@7878
|
320 |
"A <= B ==> v localTo[B] F <= v localTo[A] F";
|
paulson@7878
|
321 |
by Auto_tac;
|
paulson@7878
|
322 |
by (dres_inst_tac [("x", "v xc")] spec 1);
|
paulson@7878
|
323 |
by (dres_inst_tac [("x", "Restrict B xa")] bspec 1);
|
paulson@7878
|
324 |
by Auto_tac;
|
paulson@7878
|
325 |
by (blast_tac (claset() addIs [Restrict_eq_mono RSN (2,Restrict_imageI)]) 1);
|
paulson@7878
|
326 |
qed "localTo_anti_mono";
|
paulson@7878
|
327 |
|
paulson@7947
|
328 |
bind_thm ("localTo_UNIV_imp_localTo",
|
paulson@7947
|
329 |
impOfSubs (subset_UNIV RS localTo_anti_mono));
|
paulson@7947
|
330 |
|
paulson@7878
|
331 |
Goalw [LocalTo_def]
|
paulson@7878
|
332 |
"G : v localTo[UNIV] F ==> G : v LocalTo F";
|
paulson@7878
|
333 |
by (blast_tac (claset() addDs [impOfSubs localTo_anti_mono]) 1);
|
paulson@7878
|
334 |
qed "localTo_imp_LocalTo";
|
paulson@7878
|
335 |
|
paulson@7878
|
336 |
Goalw [LOCALTO_def, stable_def, constrains_def]
|
paulson@7964
|
337 |
"G : v localTo[C] F ==> G : (f o v) localTo[C] F";
|
paulson@7964
|
338 |
by (Force_tac 1);
|
paulson@5804
|
339 |
qed "localTo_imp_o_localTo";
|
paulson@5804
|
340 |
|
paulson@8041
|
341 |
Goal "G : v LocalTo F ==> G : (f o v) LocalTo F";
|
paulson@8041
|
342 |
by (asm_full_simp_tac
|
paulson@8041
|
343 |
(simpset() addsimps [LocalTo_def, localTo_imp_o_localTo]) 1);
|
paulson@8041
|
344 |
qed "LocalTo_imp_o_LocalTo";
|
paulson@8041
|
345 |
|
paulson@7915
|
346 |
(*NOT USED*)
|
paulson@7878
|
347 |
Goalw [LOCALTO_def, stable_def, constrains_def]
|
paulson@7878
|
348 |
"(%s. x) localTo[C] F = UNIV";
|
paulson@7689
|
349 |
by (Blast_tac 1);
|
paulson@7689
|
350 |
qed "triv_localTo_eq_UNIV";
|
paulson@7689
|
351 |
|
paulson@7915
|
352 |
Goal "(F Join G : v localTo[C] H) = \
|
paulson@7915
|
353 |
\ (F : v localTo[C] H & G : v localTo[C] H)";
|
paulson@7915
|
354 |
by (simp_tac (simpset() addsimps [LOCALTO_def, Diff_Join_distrib,
|
paulson@7915
|
355 |
stable_def, Join_constrains]) 1);
|
paulson@7594
|
356 |
by (Blast_tac 1);
|
paulson@7594
|
357 |
qed "Join_localTo";
|
paulson@7594
|
358 |
|
paulson@7878
|
359 |
Goal "F : v localTo[C] F";
|
paulson@7594
|
360 |
by (simp_tac
|
paulson@7878
|
361 |
(simpset() addsimps [LOCALTO_def, stable_def, constrains_def,
|
paulson@7878
|
362 |
Diff_self_eq]) 1);
|
paulson@7594
|
363 |
qed "self_localTo";
|
paulson@7594
|
364 |
|
paulson@7947
|
365 |
Goal "(F Join G : v localTo[C] F) = (G : v localTo[C] F)";
|
paulson@7947
|
366 |
by (simp_tac (simpset() addsimps [Join_localTo, self_localTo]) 1);
|
paulson@7947
|
367 |
qed "self_Join_localTo";
|
paulson@7947
|
368 |
|
paulson@7947
|
369 |
Goal "(F Join G : v LocalTo F) = (G : v LocalTo F)";
|
paulson@7947
|
370 |
by (simp_tac (simpset() addsimps [self_Join_localTo, LocalTo_def,
|
paulson@7947
|
371 |
Join_left_absorb]) 1);
|
paulson@7947
|
372 |
qed "self_Join_LocalTo";
|
paulson@7947
|
373 |
|
paulson@8041
|
374 |
Goalw [LOCALTO_def]
|
paulson@8041
|
375 |
"[| G : v localTo[C] F; F<=F' |] ==> G : v localTo[C] F'";
|
paulson@8041
|
376 |
by (Force_tac 1);
|
paulson@8041
|
377 |
qed "localTo_imp_o_localTo";
|
paulson@8041
|
378 |
|
paulson@7594
|
379 |
|
paulson@5804
|
380 |
|
paulson@5804
|
381 |
(*** Higher-level rules involving localTo and Join ***)
|
paulson@5804
|
382 |
|
paulson@8041
|
383 |
Goal "[| F : {s. P (v s)} co B; G : v localTo[C] F |] \
|
paulson@8041
|
384 |
\ ==> G : C Int {s. P (v s)} co B";
|
paulson@7878
|
385 |
by (ftac constrains_imp_subset 1);
|
paulson@7826
|
386 |
by (auto_tac (claset(),
|
paulson@7878
|
387 |
simpset() addsimps [LOCALTO_def, stable_def, constrains_def,
|
paulson@7826
|
388 |
Diff_def]));
|
paulson@7878
|
389 |
by (case_tac "Restrict C act: Restrict C `` Acts F" 1);
|
paulson@7878
|
390 |
by (blast_tac (claset() addSEs [equalityE]) 1);
|
paulson@7826
|
391 |
by (subgoal_tac "v x = v xa" 1);
|
paulson@7878
|
392 |
by (Force_tac 1);
|
paulson@7878
|
393 |
by (thin_tac "ALL act: ?A. ?P act" 1);
|
paulson@7878
|
394 |
by (dtac spec 1);
|
paulson@7878
|
395 |
by (dres_inst_tac [("x", "Restrict C act")] bspec 1);
|
paulson@7826
|
396 |
by Auto_tac;
|
paulson@7826
|
397 |
qed "constrains_localTo_constrains";
|
paulson@7826
|
398 |
|
paulson@7878
|
399 |
Goalw [LOCALTO_def, stable_def, constrains_def, Diff_def]
|
paulson@7878
|
400 |
"[| G : v localTo[C] F; G : w localTo[C] F |] \
|
paulson@7878
|
401 |
\ ==> G : (%s. (v s, w s)) localTo[C] F";
|
paulson@7826
|
402 |
by (Blast_tac 1);
|
paulson@7826
|
403 |
qed "localTo_pairfun";
|
paulson@7826
|
404 |
|
paulson@8041
|
405 |
Goal "[| F : {s. P (v s) (w s)} co B; \
|
paulson@7878
|
406 |
\ G : v localTo[C] F; \
|
paulson@7878
|
407 |
\ G : w localTo[C] F |] \
|
paulson@8041
|
408 |
\ ==> G : C Int {s. P (v s) (w s)} co B";
|
paulson@8041
|
409 |
by (res_inst_tac [("A", "C Int {s. (%(x,y). P x y) (v s, w s)}")]
|
paulson@7826
|
410 |
constrains_weaken 1);
|
paulson@7826
|
411 |
by (rtac (localTo_pairfun RSN (2, constrains_localTo_constrains)) 1);
|
paulson@6295
|
412 |
by Auto_tac;
|
paulson@5804
|
413 |
qed "constrains_localTo_constrains2";
|
paulson@5804
|
414 |
|
paulson@7878
|
415 |
(*Used just once, in Client.ML. Having F in the conclusion is silly.*)
|
paulson@5804
|
416 |
Goalw [stable_def]
|
paulson@5804
|
417 |
"[| F : stable {s. P (v s) (w s)}; \
|
paulson@7878
|
418 |
\ G : v localTo[UNIV] F; G : w localTo[UNIV] F |] \
|
paulson@5804
|
419 |
\ ==> F Join G : stable {s. P (v s) (w s)}";
|
paulson@7878
|
420 |
by (asm_simp_tac (simpset() addsimps [Join_constrains]) 1);
|
paulson@7878
|
421 |
by (blast_tac (claset() addIs [constrains_localTo_constrains2 RS
|
paulson@7878
|
422 |
constrains_weaken]) 1);
|
paulson@5804
|
423 |
qed "stable_localTo_stable2";
|
paulson@5804
|
424 |
|
paulson@7878
|
425 |
(*Used just in Client.ML. Generalize to arbitrary C?*)
|
paulson@5804
|
426 |
Goal "[| F : stable {s. v s <= w s}; \
|
paulson@7878
|
427 |
\ G : v localTo[UNIV] F; \
|
paulson@7826
|
428 |
\ F Join G : Increasing w |] \
|
paulson@5804
|
429 |
\ ==> F Join G : Stable {s. v s <= w s}";
|
paulson@7826
|
430 |
by (auto_tac (claset(),
|
paulson@7826
|
431 |
simpset() addsimps [stable_def, Stable_def, Increasing_def,
|
paulson@7826
|
432 |
Constrains_def, Join_constrains, all_conj_distrib]));
|
paulson@7826
|
433 |
by (blast_tac (claset() addIs [constrains_weaken]) 1);
|
paulson@7826
|
434 |
(*The G case remains; proved like constrains_localTo_constrains*)
|
paulson@7826
|
435 |
by (auto_tac (claset(),
|
paulson@7878
|
436 |
simpset() addsimps [LOCALTO_def, stable_def, constrains_def,
|
paulson@7878
|
437 |
Diff_def]));
|
paulson@7826
|
438 |
by (case_tac "act: Acts F" 1);
|
paulson@7826
|
439 |
by (Blast_tac 1);
|
paulson@7826
|
440 |
by (thin_tac "ALL act:Acts F. ?P act" 1);
|
paulson@7826
|
441 |
by (thin_tac "ALL z. ALL act:Acts F. ?P z act" 1);
|
paulson@7826
|
442 |
by (dres_inst_tac [("x", "v xa")] spec 1 THEN dtac bspec 1 THEN rtac DiffI 1);
|
paulson@7826
|
443 |
by (assume_tac 1);
|
paulson@7826
|
444 |
by (Blast_tac 1);
|
paulson@7826
|
445 |
by (subgoal_tac "v x = v xa" 1);
|
paulson@5804
|
446 |
by Auto_tac;
|
paulson@5804
|
447 |
qed "Increasing_localTo_Stable";
|