author | huffman |
Sun, 25 Mar 2012 20:15:39 +0200 | |
changeset 47108 | 2a1953f0d20d |
parent 44890 | 22f665a2e91c |
child 50630 | 1ea90e8046dc |
permissions | -rw-r--r-- |
36098
53992c639da5
added imperative SAT checker; improved headers of example files; adopted IsaMakefile
bulwahn
parents:
35041
diff
changeset
|
1 |
(* Title: HOL/Imperative_HOL/ex/Imperative_Quicksort.thy |
53992c639da5
added imperative SAT checker; improved headers of example files; adopted IsaMakefile
bulwahn
parents:
35041
diff
changeset
|
2 |
Author: Lukas Bulwahn, TU Muenchen |
53992c639da5
added imperative SAT checker; improved headers of example files; adopted IsaMakefile
bulwahn
parents:
35041
diff
changeset
|
3 |
*) |
53992c639da5
added imperative SAT checker; improved headers of example files; adopted IsaMakefile
bulwahn
parents:
35041
diff
changeset
|
4 |
|
53992c639da5
added imperative SAT checker; improved headers of example files; adopted IsaMakefile
bulwahn
parents:
35041
diff
changeset
|
5 |
header {* An imperative implementation of Quicksort on arrays *} |
30689
b14b2cc4e25e
moved Imperative_HOL examples to Imperative_HOL/ex
haftmann
parents:
29793
diff
changeset
|
6 |
|
b14b2cc4e25e
moved Imperative_HOL examples to Imperative_HOL/ex
haftmann
parents:
29793
diff
changeset
|
7 |
theory Imperative_Quicksort |
41413
64cd30d6b0b8
explicit file specifications -- avoid secondary load path;
wenzelm
parents:
40671
diff
changeset
|
8 |
imports |
47108
2a1953f0d20d
merged fork with new numeral representation (see NEWS)
huffman
parents:
44890
diff
changeset
|
9 |
"~~/src/HOL/Imperative_HOL/Imperative_HOL" |
41413
64cd30d6b0b8
explicit file specifications -- avoid secondary load path;
wenzelm
parents:
40671
diff
changeset
|
10 |
Subarray |
64cd30d6b0b8
explicit file specifications -- avoid secondary load path;
wenzelm
parents:
40671
diff
changeset
|
11 |
"~~/src/HOL/Library/Multiset" |
64cd30d6b0b8
explicit file specifications -- avoid secondary load path;
wenzelm
parents:
40671
diff
changeset
|
12 |
"~~/src/HOL/Library/Efficient_Nat" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
13 |
begin |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
14 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
15 |
text {* We prove QuickSort correct in the Relational Calculus. *} |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
16 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
17 |
definition swap :: "nat array \<Rightarrow> nat \<Rightarrow> nat \<Rightarrow> unit Heap" |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
18 |
where |
37792 | 19 |
"swap arr i j = |
20 |
do { |
|
37798
0b0570445a2a
proper merge of operation changes and generic do-syntax
haftmann
parents:
37797
diff
changeset
|
21 |
x \<leftarrow> Array.nth arr i; |
0b0570445a2a
proper merge of operation changes and generic do-syntax
haftmann
parents:
37797
diff
changeset
|
22 |
y \<leftarrow> Array.nth arr j; |
0b0570445a2a
proper merge of operation changes and generic do-syntax
haftmann
parents:
37797
diff
changeset
|
23 |
Array.upd i y arr; |
0b0570445a2a
proper merge of operation changes and generic do-syntax
haftmann
parents:
37797
diff
changeset
|
24 |
Array.upd j x arr; |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
25 |
return () |
37792 | 26 |
}" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
27 |
|
40671 | 28 |
lemma effect_swapI [effect_intros]: |
37802 | 29 |
assumes "i < Array.length h a" "j < Array.length h a" |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
30 |
"x = Array.get h a ! i" "y = Array.get h a ! j" |
37798
0b0570445a2a
proper merge of operation changes and generic do-syntax
haftmann
parents:
37797
diff
changeset
|
31 |
"h' = Array.update a j x (Array.update a i y h)" |
40671 | 32 |
shows "effect (swap a i j) h h' r" |
33 |
unfolding swap_def using assms by (auto intro!: effect_intros) |
|
37771
1bec64044b5e
spelt out relational framework in a consistent way
haftmann
parents:
37758
diff
changeset
|
34 |
|
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
35 |
lemma swap_permutes: |
40671 | 36 |
assumes "effect (swap a i j) h h' rs" |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
37 |
shows "multiset_of (Array.get h' a) |
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
38 |
= multiset_of (Array.get h a)" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
39 |
using assms |
28145 | 40 |
unfolding swap_def |
40671 | 41 |
by (auto simp add: Array.length_def multiset_of_swap dest: sym [of _ "h'"] elim!: effect_bindE effect_nthE effect_returnE effect_updE) |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
42 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
43 |
function part1 :: "nat array \<Rightarrow> nat \<Rightarrow> nat \<Rightarrow> nat \<Rightarrow> nat Heap" |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
44 |
where |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
45 |
"part1 a left right p = ( |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
46 |
if (right \<le> left) then return right |
37792 | 47 |
else do { |
37798
0b0570445a2a
proper merge of operation changes and generic do-syntax
haftmann
parents:
37797
diff
changeset
|
48 |
v \<leftarrow> Array.nth a left; |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
49 |
(if (v \<le> p) then (part1 a (left + 1) right p) |
37792 | 50 |
else (do { swap a left right; |
51 |
part1 a left (right - 1) p })) |
|
52 |
})" |
|
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
53 |
by pat_completeness auto |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
54 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
55 |
termination |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
56 |
by (relation "measure (\<lambda>(_,l,r,_). r - l )") auto |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
57 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
58 |
declare part1.simps[simp del] |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
59 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
60 |
lemma part_permutes: |
40671 | 61 |
assumes "effect (part1 a l r p) h h' rs" |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
62 |
shows "multiset_of (Array.get h' a) |
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
63 |
= multiset_of (Array.get h a)" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
64 |
using assms |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
65 |
proof (induct a l r p arbitrary: h h' rs rule:part1.induct) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
66 |
case (1 a l r p h h' rs) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
67 |
thus ?case |
28145 | 68 |
unfolding part1.simps [of a l r p] |
40671 | 69 |
by (elim effect_bindE effect_ifE effect_returnE effect_nthE) (auto simp add: swap_permutes) |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
70 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
71 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
72 |
lemma part_returns_index_in_bounds: |
40671 | 73 |
assumes "effect (part1 a l r p) h h' rs" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
74 |
assumes "l \<le> r" |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
75 |
shows "l \<le> rs \<and> rs \<le> r" |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
76 |
using assms |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
77 |
proof (induct a l r p arbitrary: h h' rs rule:part1.induct) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
78 |
case (1 a l r p h h' rs) |
40671 | 79 |
note cr = `effect (part1 a l r p) h h' rs` |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
80 |
show ?case |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
81 |
proof (cases "r \<le> l") |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
82 |
case True (* Terminating case *) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
83 |
with cr `l \<le> r` show ?thesis |
28145 | 84 |
unfolding part1.simps[of a l r p] |
40671 | 85 |
by (elim effect_bindE effect_ifE effect_returnE effect_nthE) auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
86 |
next |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
87 |
case False (* recursive case *) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
88 |
note rec_condition = this |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
89 |
let ?v = "Array.get h a ! l" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
90 |
show ?thesis |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
91 |
proof (cases "?v \<le> p") |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
92 |
case True |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
93 |
with cr False |
40671 | 94 |
have rec1: "effect (part1 a (l + 1) r p) h h' rs" |
28145 | 95 |
unfolding part1.simps[of a l r p] |
40671 | 96 |
by (elim effect_bindE effect_nthE effect_ifE effect_returnE) auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
97 |
from rec_condition have "l + 1 \<le> r" by arith |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
98 |
from 1(1)[OF rec_condition True rec1 `l + 1 \<le> r`] |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
99 |
show ?thesis by simp |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
100 |
next |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
101 |
case False |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
102 |
with rec_condition cr |
40671 | 103 |
obtain h1 where swp: "effect (swap a l r) h h1 ()" |
104 |
and rec2: "effect (part1 a l (r - 1) p) h1 h' rs" |
|
28145 | 105 |
unfolding part1.simps[of a l r p] |
40671 | 106 |
by (elim effect_bindE effect_nthE effect_ifE effect_returnE) auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
107 |
from rec_condition have "l \<le> r - 1" by arith |
44890
22f665a2e91c
new fastforce replacing fastsimp - less confusing name
nipkow
parents:
41413
diff
changeset
|
108 |
from 1(2) [OF rec_condition False rec2 `l \<le> r - 1`] show ?thesis by fastforce |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
109 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
110 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
111 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
112 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
113 |
lemma part_length_remains: |
40671 | 114 |
assumes "effect (part1 a l r p) h h' rs" |
37802 | 115 |
shows "Array.length h a = Array.length h' a" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
116 |
using assms |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
117 |
proof (induct a l r p arbitrary: h h' rs rule:part1.induct) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
118 |
case (1 a l r p h h' rs) |
40671 | 119 |
note cr = `effect (part1 a l r p) h h' rs` |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
120 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
121 |
show ?case |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
122 |
proof (cases "r \<le> l") |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
123 |
case True (* Terminating case *) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
124 |
with cr show ?thesis |
28145 | 125 |
unfolding part1.simps[of a l r p] |
40671 | 126 |
by (elim effect_bindE effect_ifE effect_returnE effect_nthE) auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
127 |
next |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
128 |
case False (* recursive case *) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
129 |
with cr 1 show ?thesis |
28145 | 130 |
unfolding part1.simps [of a l r p] swap_def |
44890
22f665a2e91c
new fastforce replacing fastsimp - less confusing name
nipkow
parents:
41413
diff
changeset
|
131 |
by (auto elim!: effect_bindE effect_ifE effect_nthE effect_returnE effect_updE) fastforce |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
132 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
133 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
134 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
135 |
lemma part_outer_remains: |
40671 | 136 |
assumes "effect (part1 a l r p) h h' rs" |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
137 |
shows "\<forall>i. i < l \<or> r < i \<longrightarrow> Array.get h (a::nat array) ! i = Array.get h' a ! i" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
138 |
using assms |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
139 |
proof (induct a l r p arbitrary: h h' rs rule:part1.induct) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
140 |
case (1 a l r p h h' rs) |
40671 | 141 |
note cr = `effect (part1 a l r p) h h' rs` |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
142 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
143 |
show ?case |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
144 |
proof (cases "r \<le> l") |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
145 |
case True (* Terminating case *) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
146 |
with cr show ?thesis |
28145 | 147 |
unfolding part1.simps[of a l r p] |
40671 | 148 |
by (elim effect_bindE effect_ifE effect_returnE effect_nthE) auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
149 |
next |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
150 |
case False (* recursive case *) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
151 |
note rec_condition = this |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
152 |
let ?v = "Array.get h a ! l" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
153 |
show ?thesis |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
154 |
proof (cases "?v \<le> p") |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
155 |
case True |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
156 |
with cr False |
40671 | 157 |
have rec1: "effect (part1 a (l + 1) r p) h h' rs" |
28145 | 158 |
unfolding part1.simps[of a l r p] |
40671 | 159 |
by (elim effect_bindE effect_nthE effect_ifE effect_returnE) auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
160 |
from 1(1)[OF rec_condition True rec1] |
44890
22f665a2e91c
new fastforce replacing fastsimp - less confusing name
nipkow
parents:
41413
diff
changeset
|
161 |
show ?thesis by fastforce |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
162 |
next |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
163 |
case False |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
164 |
with rec_condition cr |
40671 | 165 |
obtain h1 where swp: "effect (swap a l r) h h1 ()" |
166 |
and rec2: "effect (part1 a l (r - 1) p) h1 h' rs" |
|
28145 | 167 |
unfolding part1.simps[of a l r p] |
40671 | 168 |
by (elim effect_bindE effect_nthE effect_ifE effect_returnE) auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
169 |
from swp rec_condition have |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
170 |
"\<forall>i. i < l \<or> r < i \<longrightarrow> Array.get h a ! i = Array.get h1 a ! i" |
32960
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
171 |
unfolding swap_def |
40671 | 172 |
by (elim effect_bindE effect_nthE effect_updE effect_returnE) auto |
44890
22f665a2e91c
new fastforce replacing fastsimp - less confusing name
nipkow
parents:
41413
diff
changeset
|
173 |
with 1(2) [OF rec_condition False rec2] show ?thesis by fastforce |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
174 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
175 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
176 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
177 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
178 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
179 |
lemma part_partitions: |
40671 | 180 |
assumes "effect (part1 a l r p) h h' rs" |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
181 |
shows "(\<forall>i. l \<le> i \<and> i < rs \<longrightarrow> Array.get h' (a::nat array) ! i \<le> p) |
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
182 |
\<and> (\<forall>i. rs < i \<and> i \<le> r \<longrightarrow> Array.get h' a ! i \<ge> p)" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
183 |
using assms |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
184 |
proof (induct a l r p arbitrary: h h' rs rule:part1.induct) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
185 |
case (1 a l r p h h' rs) |
40671 | 186 |
note cr = `effect (part1 a l r p) h h' rs` |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
187 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
188 |
show ?case |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
189 |
proof (cases "r \<le> l") |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
190 |
case True (* Terminating case *) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
191 |
with cr have "rs = r" |
28145 | 192 |
unfolding part1.simps[of a l r p] |
40671 | 193 |
by (elim effect_bindE effect_ifE effect_returnE effect_nthE) auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
194 |
with True |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
195 |
show ?thesis by auto |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
196 |
next |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
197 |
case False (* recursive case *) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
198 |
note lr = this |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
199 |
let ?v = "Array.get h a ! l" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
200 |
show ?thesis |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
201 |
proof (cases "?v \<le> p") |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
202 |
case True |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
203 |
with lr cr |
40671 | 204 |
have rec1: "effect (part1 a (l + 1) r p) h h' rs" |
28145 | 205 |
unfolding part1.simps[of a l r p] |
40671 | 206 |
by (elim effect_bindE effect_nthE effect_ifE effect_returnE) auto |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
207 |
from True part_outer_remains[OF rec1] have a_l: "Array.get h' a ! l \<le> p" |
44890
22f665a2e91c
new fastforce replacing fastsimp - less confusing name
nipkow
parents:
41413
diff
changeset
|
208 |
by fastforce |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
209 |
have "\<forall>i. (l \<le> i = (l = i \<or> Suc l \<le> i))" by arith |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
210 |
with 1(1)[OF False True rec1] a_l show ?thesis |
32960
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
211 |
by auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
212 |
next |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
213 |
case False |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
214 |
with lr cr |
40671 | 215 |
obtain h1 where swp: "effect (swap a l r) h h1 ()" |
216 |
and rec2: "effect (part1 a l (r - 1) p) h1 h' rs" |
|
28145 | 217 |
unfolding part1.simps[of a l r p] |
40671 | 218 |
by (elim effect_bindE effect_nthE effect_ifE effect_returnE) auto |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
219 |
from swp False have "Array.get h1 a ! r \<ge> p" |
32960
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
220 |
unfolding swap_def |
40671 | 221 |
by (auto simp add: Array.length_def elim!: effect_bindE effect_nthE effect_updE effect_returnE) |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
222 |
with part_outer_remains [OF rec2] lr have a_r: "Array.get h' a ! r \<ge> p" |
44890
22f665a2e91c
new fastforce replacing fastsimp - less confusing name
nipkow
parents:
41413
diff
changeset
|
223 |
by fastforce |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
224 |
have "\<forall>i. (i \<le> r = (i = r \<or> i \<le> r - 1))" by arith |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
225 |
with 1(2)[OF lr False rec2] a_r show ?thesis |
32960
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
226 |
by auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
227 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
228 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
229 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
230 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
231 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
232 |
fun partition :: "nat array \<Rightarrow> nat \<Rightarrow> nat \<Rightarrow> nat Heap" |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
233 |
where |
37792 | 234 |
"partition a left right = do { |
37798
0b0570445a2a
proper merge of operation changes and generic do-syntax
haftmann
parents:
37797
diff
changeset
|
235 |
pivot \<leftarrow> Array.nth a right; |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
236 |
middle \<leftarrow> part1 a left (right - 1) pivot; |
37798
0b0570445a2a
proper merge of operation changes and generic do-syntax
haftmann
parents:
37797
diff
changeset
|
237 |
v \<leftarrow> Array.nth a middle; |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
238 |
m \<leftarrow> return (if (v \<le> pivot) then (middle + 1) else middle); |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
239 |
swap a m right; |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
240 |
return m |
37792 | 241 |
}" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
242 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
243 |
declare partition.simps[simp del] |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
244 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
245 |
lemma partition_permutes: |
40671 | 246 |
assumes "effect (partition a l r) h h' rs" |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
247 |
shows "multiset_of (Array.get h' a) |
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
248 |
= multiset_of (Array.get h a)" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
249 |
proof - |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
250 |
from assms part_permutes swap_permutes show ?thesis |
28145 | 251 |
unfolding partition.simps |
40671 | 252 |
by (elim effect_bindE effect_returnE effect_nthE effect_ifE effect_updE) auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
253 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
254 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
255 |
lemma partition_length_remains: |
40671 | 256 |
assumes "effect (partition a l r) h h' rs" |
37802 | 257 |
shows "Array.length h a = Array.length h' a" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
258 |
proof - |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
259 |
from assms part_length_remains show ?thesis |
28145 | 260 |
unfolding partition.simps swap_def |
40671 | 261 |
by (elim effect_bindE effect_returnE effect_nthE effect_ifE effect_updE) auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
262 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
263 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
264 |
lemma partition_outer_remains: |
40671 | 265 |
assumes "effect (partition a l r) h h' rs" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
266 |
assumes "l < r" |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
267 |
shows "\<forall>i. i < l \<or> r < i \<longrightarrow> Array.get h (a::nat array) ! i = Array.get h' a ! i" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
268 |
proof - |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
269 |
from assms part_outer_remains part_returns_index_in_bounds show ?thesis |
28145 | 270 |
unfolding partition.simps swap_def |
44890
22f665a2e91c
new fastforce replacing fastsimp - less confusing name
nipkow
parents:
41413
diff
changeset
|
271 |
by (elim effect_bindE effect_returnE effect_nthE effect_ifE effect_updE) fastforce |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
272 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
273 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
274 |
lemma partition_returns_index_in_bounds: |
40671 | 275 |
assumes effect: "effect (partition a l r) h h' rs" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
276 |
assumes "l < r" |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
277 |
shows "l \<le> rs \<and> rs \<le> r" |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
278 |
proof - |
40671 | 279 |
from effect obtain middle h'' p where part: "effect (part1 a l (r - 1) p) h h'' middle" |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
280 |
and rs_equals: "rs = (if Array.get h'' a ! middle \<le> Array.get h a ! r then middle + 1 |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
281 |
else middle)" |
28145 | 282 |
unfolding partition.simps |
40671 | 283 |
by (elim effect_bindE effect_returnE effect_nthE effect_ifE effect_updE) simp |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
284 |
from `l < r` have "l \<le> r - 1" by arith |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
285 |
from part_returns_index_in_bounds[OF part this] rs_equals `l < r` show ?thesis by auto |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
286 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
287 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
288 |
lemma partition_partitions: |
40671 | 289 |
assumes effect: "effect (partition a l r) h h' rs" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
290 |
assumes "l < r" |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
291 |
shows "(\<forall>i. l \<le> i \<and> i < rs \<longrightarrow> Array.get h' (a::nat array) ! i \<le> Array.get h' a ! rs) \<and> |
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
292 |
(\<forall>i. rs < i \<and> i \<le> r \<longrightarrow> Array.get h' a ! rs \<le> Array.get h' a ! i)" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
293 |
proof - |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
294 |
let ?pivot = "Array.get h a ! r" |
40671 | 295 |
from effect obtain middle h1 where part: "effect (part1 a l (r - 1) ?pivot) h h1 middle" |
296 |
and swap: "effect (swap a rs r) h1 h' ()" |
|
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
297 |
and rs_equals: "rs = (if Array.get h1 a ! middle \<le> ?pivot then middle + 1 |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
298 |
else middle)" |
28145 | 299 |
unfolding partition.simps |
40671 | 300 |
by (elim effect_bindE effect_returnE effect_nthE effect_ifE effect_updE) simp |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
301 |
from swap have h'_def: "h' = Array.update a r (Array.get h1 a ! rs) |
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
302 |
(Array.update a rs (Array.get h1 a ! r) h1)" |
28145 | 303 |
unfolding swap_def |
40671 | 304 |
by (elim effect_bindE effect_returnE effect_nthE effect_updE) simp |
37802 | 305 |
from swap have in_bounds: "r < Array.length h1 a \<and> rs < Array.length h1 a" |
28145 | 306 |
unfolding swap_def |
40671 | 307 |
by (elim effect_bindE effect_returnE effect_nthE effect_updE) simp |
37802 | 308 |
from swap have swap_length_remains: "Array.length h1 a = Array.length h' a" |
40671 | 309 |
unfolding swap_def by (elim effect_bindE effect_returnE effect_nthE effect_updE) auto |
37771
1bec64044b5e
spelt out relational framework in a consistent way
haftmann
parents:
37758
diff
changeset
|
310 |
from `l < r` have "l \<le> r - 1" by simp |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
311 |
note middle_in_bounds = part_returns_index_in_bounds[OF part this] |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
312 |
from part_outer_remains[OF part] `l < r` |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
313 |
have "Array.get h a ! r = Array.get h1 a ! r" |
44890
22f665a2e91c
new fastforce replacing fastsimp - less confusing name
nipkow
parents:
41413
diff
changeset
|
314 |
by fastforce |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
315 |
with swap |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
316 |
have right_remains: "Array.get h a ! r = Array.get h' a ! rs" |
28145 | 317 |
unfolding swap_def |
40671 | 318 |
by (auto simp add: Array.length_def elim!: effect_bindE effect_returnE effect_nthE effect_updE) (cases "r = rs", auto) |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
319 |
from part_partitions [OF part] |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
320 |
show ?thesis |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
321 |
proof (cases "Array.get h1 a ! middle \<le> ?pivot") |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
322 |
case True |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
323 |
with rs_equals have rs_equals: "rs = middle + 1" by simp |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
324 |
{ |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
325 |
fix i |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
326 |
assume i_is_left: "l \<le> i \<and> i < rs" |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
327 |
with swap_length_remains in_bounds middle_in_bounds rs_equals `l < r` |
37802 | 328 |
have i_props: "i < Array.length h' a" "i \<noteq> r" "i \<noteq> rs" by auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
329 |
from i_is_left rs_equals have "l \<le> i \<and> i < middle \<or> i = middle" by arith |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
330 |
with part_partitions[OF part] right_remains True |
44890
22f665a2e91c
new fastforce replacing fastsimp - less confusing name
nipkow
parents:
41413
diff
changeset
|
331 |
have "Array.get h1 a ! i \<le> Array.get h' a ! rs" by fastforce |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
332 |
with i_props h'_def in_bounds have "Array.get h' a ! i \<le> Array.get h' a ! rs" |
37798
0b0570445a2a
proper merge of operation changes and generic do-syntax
haftmann
parents:
37797
diff
changeset
|
333 |
unfolding Array.update_def Array.length_def by simp |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
334 |
} |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
335 |
moreover |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
336 |
{ |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
337 |
fix i |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
338 |
assume "rs < i \<and> i \<le> r" |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
339 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
340 |
hence "(rs < i \<and> i \<le> r - 1) \<or> (rs < i \<and> i = r)" by arith |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
341 |
hence "Array.get h' a ! rs \<le> Array.get h' a ! i" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
342 |
proof |
32960
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
343 |
assume i_is: "rs < i \<and> i \<le> r - 1" |
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
344 |
with swap_length_remains in_bounds middle_in_bounds rs_equals |
37802 | 345 |
have i_props: "i < Array.length h' a" "i \<noteq> r" "i \<noteq> rs" by auto |
32960
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
346 |
from part_partitions[OF part] rs_equals right_remains i_is |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
347 |
have "Array.get h' a ! rs \<le> Array.get h1 a ! i" |
44890
22f665a2e91c
new fastforce replacing fastsimp - less confusing name
nipkow
parents:
41413
diff
changeset
|
348 |
by fastforce |
22f665a2e91c
new fastforce replacing fastsimp - less confusing name
nipkow
parents:
41413
diff
changeset
|
349 |
with i_props h'_def show ?thesis by fastforce |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
350 |
next |
32960
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
351 |
assume i_is: "rs < i \<and> i = r" |
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
352 |
with rs_equals have "Suc middle \<noteq> r" by arith |
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
353 |
with middle_in_bounds `l < r` have "Suc middle \<le> r - 1" by arith |
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
354 |
with part_partitions[OF part] right_remains |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
355 |
have "Array.get h' a ! rs \<le> Array.get h1 a ! (Suc middle)" |
44890
22f665a2e91c
new fastforce replacing fastsimp - less confusing name
nipkow
parents:
41413
diff
changeset
|
356 |
by fastforce |
32960
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
357 |
with i_is True rs_equals right_remains h'_def |
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
358 |
show ?thesis using in_bounds |
37798
0b0570445a2a
proper merge of operation changes and generic do-syntax
haftmann
parents:
37797
diff
changeset
|
359 |
unfolding Array.update_def Array.length_def |
32960
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
360 |
by auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
361 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
362 |
} |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
363 |
ultimately show ?thesis by auto |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
364 |
next |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
365 |
case False |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
366 |
with rs_equals have rs_equals: "middle = rs" by simp |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
367 |
{ |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
368 |
fix i |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
369 |
assume i_is_left: "l \<le> i \<and> i < rs" |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
370 |
with swap_length_remains in_bounds middle_in_bounds rs_equals |
37802 | 371 |
have i_props: "i < Array.length h' a" "i \<noteq> r" "i \<noteq> rs" by auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
372 |
from part_partitions[OF part] rs_equals right_remains i_is_left |
44890
22f665a2e91c
new fastforce replacing fastsimp - less confusing name
nipkow
parents:
41413
diff
changeset
|
373 |
have "Array.get h1 a ! i \<le> Array.get h' a ! rs" by fastforce |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
374 |
with i_props h'_def have "Array.get h' a ! i \<le> Array.get h' a ! rs" |
37798
0b0570445a2a
proper merge of operation changes and generic do-syntax
haftmann
parents:
37797
diff
changeset
|
375 |
unfolding Array.update_def by simp |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
376 |
} |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
377 |
moreover |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
378 |
{ |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
379 |
fix i |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
380 |
assume "rs < i \<and> i \<le> r" |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
381 |
hence "(rs < i \<and> i \<le> r - 1) \<or> i = r" by arith |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
382 |
hence "Array.get h' a ! rs \<le> Array.get h' a ! i" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
383 |
proof |
32960
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
384 |
assume i_is: "rs < i \<and> i \<le> r - 1" |
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
385 |
with swap_length_remains in_bounds middle_in_bounds rs_equals |
37802 | 386 |
have i_props: "i < Array.length h' a" "i \<noteq> r" "i \<noteq> rs" by auto |
32960
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
387 |
from part_partitions[OF part] rs_equals right_remains i_is |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
388 |
have "Array.get h' a ! rs \<le> Array.get h1 a ! i" |
44890
22f665a2e91c
new fastforce replacing fastsimp - less confusing name
nipkow
parents:
41413
diff
changeset
|
389 |
by fastforce |
22f665a2e91c
new fastforce replacing fastsimp - less confusing name
nipkow
parents:
41413
diff
changeset
|
390 |
with i_props h'_def show ?thesis by fastforce |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
391 |
next |
32960
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
392 |
assume i_is: "i = r" |
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
393 |
from i_is False rs_equals right_remains h'_def |
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
394 |
show ?thesis using in_bounds |
37798
0b0570445a2a
proper merge of operation changes and generic do-syntax
haftmann
parents:
37797
diff
changeset
|
395 |
unfolding Array.update_def Array.length_def |
32960
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
396 |
by auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
397 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
398 |
} |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
399 |
ultimately |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
400 |
show ?thesis by auto |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
401 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
402 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
403 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
404 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
405 |
function quicksort :: "nat array \<Rightarrow> nat \<Rightarrow> nat \<Rightarrow> unit Heap" |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
406 |
where |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
407 |
"quicksort arr left right = |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
408 |
(if (right > left) then |
37792 | 409 |
do { |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
410 |
pivotNewIndex \<leftarrow> partition arr left right; |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
411 |
pivotNewIndex \<leftarrow> assert (\<lambda>x. left \<le> x \<and> x \<le> right) pivotNewIndex; |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
412 |
quicksort arr left (pivotNewIndex - 1); |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
413 |
quicksort arr (pivotNewIndex + 1) right |
37792 | 414 |
} |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
415 |
else return ())" |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
416 |
by pat_completeness auto |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
417 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
418 |
(* For termination, we must show that the pivotNewIndex is between left and right *) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
419 |
termination |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
420 |
by (relation "measure (\<lambda>(a, l, r). (r - l))") auto |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
421 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
422 |
declare quicksort.simps[simp del] |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
423 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
424 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
425 |
lemma quicksort_permutes: |
40671 | 426 |
assumes "effect (quicksort a l r) h h' rs" |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
427 |
shows "multiset_of (Array.get h' a) |
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
428 |
= multiset_of (Array.get h a)" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
429 |
using assms |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
430 |
proof (induct a l r arbitrary: h h' rs rule: quicksort.induct) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
431 |
case (1 a l r h h' rs) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
432 |
with partition_permutes show ?case |
28145 | 433 |
unfolding quicksort.simps [of a l r] |
40671 | 434 |
by (elim effect_ifE effect_bindE effect_assertE effect_returnE) auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
435 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
436 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
437 |
lemma length_remains: |
40671 | 438 |
assumes "effect (quicksort a l r) h h' rs" |
37802 | 439 |
shows "Array.length h a = Array.length h' a" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
440 |
using assms |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
441 |
proof (induct a l r arbitrary: h h' rs rule: quicksort.induct) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
442 |
case (1 a l r h h' rs) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
443 |
with partition_length_remains show ?case |
28145 | 444 |
unfolding quicksort.simps [of a l r] |
40671 | 445 |
by (elim effect_ifE effect_bindE effect_assertE effect_returnE) auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
446 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
447 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
448 |
lemma quicksort_outer_remains: |
40671 | 449 |
assumes "effect (quicksort a l r) h h' rs" |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
450 |
shows "\<forall>i. i < l \<or> r < i \<longrightarrow> Array.get h (a::nat array) ! i = Array.get h' a ! i" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
451 |
using assms |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
452 |
proof (induct a l r arbitrary: h h' rs rule: quicksort.induct) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
453 |
case (1 a l r h h' rs) |
40671 | 454 |
note cr = `effect (quicksort a l r) h h' rs` |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
455 |
thus ?case |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
456 |
proof (cases "r > l") |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
457 |
case False |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
458 |
with cr have "h' = h" |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
459 |
unfolding quicksort.simps [of a l r] |
40671 | 460 |
by (elim effect_ifE effect_returnE) auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
461 |
thus ?thesis by simp |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
462 |
next |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
463 |
case True |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
464 |
{ |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
465 |
fix h1 h2 p ret1 ret2 i |
40671 | 466 |
assume part: "effect (partition a l r) h h1 p" |
467 |
assume qs1: "effect (quicksort a l (p - 1)) h1 h2 ret1" |
|
468 |
assume qs2: "effect (quicksort a (p + 1) r) h2 h' ret2" |
|
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
469 |
assume pivot: "l \<le> p \<and> p \<le> r" |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
470 |
assume i_outer: "i < l \<or> r < i" |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
471 |
from partition_outer_remains [OF part True] i_outer |
44890
22f665a2e91c
new fastforce replacing fastsimp - less confusing name
nipkow
parents:
41413
diff
changeset
|
472 |
have "Array.get h a !i = Array.get h1 a ! i" by fastforce |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
473 |
moreover |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
474 |
with 1(1) [OF True pivot qs1] pivot i_outer |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
475 |
have "Array.get h1 a ! i = Array.get h2 a ! i" by auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
476 |
moreover |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
477 |
with qs2 1(2) [of p h2 h' ret2] True pivot i_outer |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
478 |
have "Array.get h2 a ! i = Array.get h' a ! i" by auto |
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
479 |
ultimately have "Array.get h a ! i= Array.get h' a ! i" by simp |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
480 |
} |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
481 |
with cr show ?thesis |
28145 | 482 |
unfolding quicksort.simps [of a l r] |
40671 | 483 |
by (elim effect_ifE effect_bindE effect_assertE effect_returnE) auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
484 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
485 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
486 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
487 |
lemma quicksort_is_skip: |
40671 | 488 |
assumes "effect (quicksort a l r) h h' rs" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
489 |
shows "r \<le> l \<longrightarrow> h = h'" |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
490 |
using assms |
28145 | 491 |
unfolding quicksort.simps [of a l r] |
40671 | 492 |
by (elim effect_ifE effect_returnE) auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
493 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
494 |
lemma quicksort_sorts: |
40671 | 495 |
assumes "effect (quicksort a l r) h h' rs" |
37802 | 496 |
assumes l_r_length: "l < Array.length h a" "r < Array.length h a" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
497 |
shows "sorted (subarray l (r + 1) a h')" |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
498 |
using assms |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
499 |
proof (induct a l r arbitrary: h h' rs rule: quicksort.induct) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
500 |
case (1 a l r h h' rs) |
40671 | 501 |
note cr = `effect (quicksort a l r) h h' rs` |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
502 |
thus ?case |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
503 |
proof (cases "r > l") |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
504 |
case False |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
505 |
hence "l \<ge> r + 1 \<or> l = r" by arith |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
506 |
with length_remains[OF cr] 1(5) show ?thesis |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
507 |
by (auto simp add: subarray_Nil subarray_single) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
508 |
next |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
509 |
case True |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
510 |
{ |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
511 |
fix h1 h2 p |
40671 | 512 |
assume part: "effect (partition a l r) h h1 p" |
513 |
assume qs1: "effect (quicksort a l (p - 1)) h1 h2 ()" |
|
514 |
assume qs2: "effect (quicksort a (p + 1) r) h2 h' ()" |
|
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
515 |
from partition_returns_index_in_bounds [OF part True] |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
516 |
have pivot: "l\<le> p \<and> p \<le> r" . |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
517 |
note length_remains = length_remains[OF qs2] length_remains[OF qs1] partition_length_remains[OF part] |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
518 |
from quicksort_outer_remains [OF qs2] quicksort_outer_remains [OF qs1] pivot quicksort_is_skip[OF qs1] |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
519 |
have pivot_unchanged: "Array.get h1 a ! p = Array.get h' a ! p" by (cases p, auto) |
28013 | 520 |
(*-- First of all, by induction hypothesis both sublists are sorted. *) |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
521 |
from 1(1)[OF True pivot qs1] length_remains pivot 1(5) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
522 |
have IH1: "sorted (subarray l p a h2)" by (cases p, auto simp add: subarray_Nil) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
523 |
from quicksort_outer_remains [OF qs2] length_remains |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
524 |
have left_subarray_remains: "subarray l p a h2 = subarray l p a h'" |
32960
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
525 |
by (simp add: subarray_eq_samelength_iff) |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
526 |
with IH1 have IH1': "sorted (subarray l p a h')" by simp |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
527 |
from 1(2)[OF True pivot qs2] pivot 1(5) length_remains |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
528 |
have IH2: "sorted (subarray (p + 1) (r + 1) a h')" |
28013 | 529 |
by (cases "Suc p \<le> r", auto simp add: subarray_Nil) |
530 |
(* -- Secondly, both sublists remain partitioned. *) |
|
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
531 |
from partition_partitions[OF part True] |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
532 |
have part_conds1: "\<forall>j. j \<in> set (subarray l p a h1) \<longrightarrow> j \<le> Array.get h1 a ! p " |
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
533 |
and part_conds2: "\<forall>j. j \<in> set (subarray (p + 1) (r + 1) a h1) \<longrightarrow> Array.get h1 a ! p \<le> j" |
28013 | 534 |
by (auto simp add: all_in_set_subarray_conv) |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
535 |
from quicksort_outer_remains [OF qs1] quicksort_permutes [OF qs1] True |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
536 |
length_remains 1(5) pivot multiset_of_sublist [of l p "Array.get h1 a" "Array.get h2 a"] |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
537 |
have multiset_partconds1: "multiset_of (subarray l p a h2) = multiset_of (subarray l p a h1)" |
37719
271ecd4fb9f9
moved "open" operations from Heap.thy to Array.thy and Ref.thy
haftmann
parents:
36098
diff
changeset
|
538 |
unfolding Array.length_def subarray_def by (cases p, auto) |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
539 |
with left_subarray_remains part_conds1 pivot_unchanged |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
540 |
have part_conds2': "\<forall>j. j \<in> set (subarray l p a h') \<longrightarrow> j \<le> Array.get h' a ! p" |
28013 | 541 |
by (simp, subst set_of_multiset_of[symmetric], simp) |
542 |
(* -- These steps are the analogous for the right sublist \<dots> *) |
|
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
543 |
from quicksort_outer_remains [OF qs1] length_remains |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
544 |
have right_subarray_remains: "subarray (p + 1) (r + 1) a h1 = subarray (p + 1) (r + 1) a h2" |
32960
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
545 |
by (auto simp add: subarray_eq_samelength_iff) |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
546 |
from quicksort_outer_remains [OF qs2] quicksort_permutes [OF qs2] True |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
547 |
length_remains 1(5) pivot multiset_of_sublist [of "p + 1" "r + 1" "Array.get h2 a" "Array.get h' a"] |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
548 |
have multiset_partconds2: "multiset_of (subarray (p + 1) (r + 1) a h') = multiset_of (subarray (p + 1) (r + 1) a h2)" |
37719
271ecd4fb9f9
moved "open" operations from Heap.thy to Array.thy and Ref.thy
haftmann
parents:
36098
diff
changeset
|
549 |
unfolding Array.length_def subarray_def by auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
550 |
with right_subarray_remains part_conds2 pivot_unchanged |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
551 |
have part_conds1': "\<forall>j. j \<in> set (subarray (p + 1) (r + 1) a h') \<longrightarrow> Array.get h' a ! p \<le> j" |
28013 | 552 |
by (simp, subst set_of_multiset_of[symmetric], simp) |
553 |
(* -- Thirdly and finally, we show that the array is sorted |
|
554 |
following from the facts above. *) |
|
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
555 |
from True pivot 1(5) length_remains have "subarray l (r + 1) a h' = subarray l p a h' @ [Array.get h' a ! p] @ subarray (p + 1) (r + 1) a h'" |
32960
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
556 |
by (simp add: subarray_nth_array_Cons, cases "l < p") (auto simp add: subarray_append subarray_Nil) |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
557 |
with IH1' IH2 part_conds1' part_conds2' pivot have ?thesis |
32960
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
558 |
unfolding subarray_def |
69916a850301
eliminated hard tabulators, guessing at each author's individual tab-width;
wenzelm
parents:
31887
diff
changeset
|
559 |
apply (auto simp add: sorted_append sorted_Cons all_in_set_sublist'_conv) |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
560 |
by (auto simp add: set_sublist' dest: le_trans [of _ "Array.get h' a ! p"]) |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
561 |
} |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
562 |
with True cr show ?thesis |
28145 | 563 |
unfolding quicksort.simps [of a l r] |
40671 | 564 |
by (elim effect_ifE effect_returnE effect_bindE effect_assertE) auto |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
565 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
566 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
567 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
568 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
569 |
lemma quicksort_is_sort: |
40671 | 570 |
assumes effect: "effect (quicksort a 0 (Array.length h a - 1)) h h' rs" |
37806
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
571 |
shows "Array.get h' a = sort (Array.get h a)" |
a7679be14442
qualified names for (really) all array operations
haftmann
parents:
37805
diff
changeset
|
572 |
proof (cases "Array.get h a = []") |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
573 |
case True |
40671 | 574 |
with quicksort_is_skip[OF effect] show ?thesis |
37719
271ecd4fb9f9
moved "open" operations from Heap.thy to Array.thy and Ref.thy
haftmann
parents:
36098
diff
changeset
|
575 |
unfolding Array.length_def by simp |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
576 |
next |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
577 |
case False |
40671 | 578 |
from quicksort_sorts [OF effect] False have "sorted (sublist' 0 (List.length (Array.get h a)) (Array.get h' a))" |
37719
271ecd4fb9f9
moved "open" operations from Heap.thy to Array.thy and Ref.thy
haftmann
parents:
36098
diff
changeset
|
579 |
unfolding Array.length_def subarray_def by auto |
40671 | 580 |
with length_remains[OF effect] have "sorted (Array.get h' a)" |
37719
271ecd4fb9f9
moved "open" operations from Heap.thy to Array.thy and Ref.thy
haftmann
parents:
36098
diff
changeset
|
581 |
unfolding Array.length_def by simp |
44890
22f665a2e91c
new fastforce replacing fastsimp - less confusing name
nipkow
parents:
41413
diff
changeset
|
582 |
with quicksort_permutes [OF effect] properties_for_sort show ?thesis by fastforce |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
583 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
584 |
|
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
585 |
subsection {* No Errors in quicksort *} |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
586 |
text {* We have proved that quicksort sorts (if no exceptions occur). |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
587 |
We will now show that exceptions do not occur. *} |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
588 |
|
37758 | 589 |
lemma success_part1I: |
37802 | 590 |
assumes "l < Array.length h a" "r < Array.length h a" |
37758 | 591 |
shows "success (part1 a l r p) h" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
592 |
using assms |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
593 |
proof (induct a l r p arbitrary: h rule: part1.induct) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
594 |
case (1 a l r p) |
37771
1bec64044b5e
spelt out relational framework in a consistent way
haftmann
parents:
37758
diff
changeset
|
595 |
thus ?case unfolding part1.simps [of a l r] |
47108
2a1953f0d20d
merged fork with new numeral representation (see NEWS)
huffman
parents:
44890
diff
changeset
|
596 |
apply (auto intro!: success_intros simp add: not_le) |
2a1953f0d20d
merged fork with new numeral representation (see NEWS)
huffman
parents:
44890
diff
changeset
|
597 |
apply (auto intro!: effect_intros) |
37771
1bec64044b5e
spelt out relational framework in a consistent way
haftmann
parents:
37758
diff
changeset
|
598 |
done |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
599 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
600 |
|
37758 | 601 |
lemma success_bindI' [success_intros]: (*FIXME move*) |
602 |
assumes "success f h" |
|
40671 | 603 |
assumes "\<And>h' r. effect f h h' r \<Longrightarrow> success (g r) h'" |
37758 | 604 |
shows "success (f \<guillemotright>= g) h" |
40671 | 605 |
using assms(1) proof (rule success_effectE) |
37771
1bec64044b5e
spelt out relational framework in a consistent way
haftmann
parents:
37758
diff
changeset
|
606 |
fix h' r |
40671 | 607 |
assume "effect f h h' r" |
37771
1bec64044b5e
spelt out relational framework in a consistent way
haftmann
parents:
37758
diff
changeset
|
608 |
moreover with assms(2) have "success (g r) h'" . |
40671 | 609 |
ultimately show "success (f \<guillemotright>= g) h" by (rule success_bind_effectI) |
37771
1bec64044b5e
spelt out relational framework in a consistent way
haftmann
parents:
37758
diff
changeset
|
610 |
qed |
37758 | 611 |
|
612 |
lemma success_partitionI: |
|
37802 | 613 |
assumes "l < r" "l < Array.length h a" "r < Array.length h a" |
37758 | 614 |
shows "success (partition a l r) h" |
615 |
using assms unfolding partition.simps swap_def |
|
40671 | 616 |
apply (auto intro!: success_bindI' success_ifI success_returnI success_nthI success_updI success_part1I elim!: effect_bindE effect_updE effect_nthE effect_returnE simp add:) |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
617 |
apply (frule part_length_remains) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
618 |
apply (frule part_returns_index_in_bounds) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
619 |
apply auto |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
620 |
apply (frule part_length_remains) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
621 |
apply (frule part_returns_index_in_bounds) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
622 |
apply auto |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
623 |
apply (frule part_length_remains) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
624 |
apply auto |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
625 |
done |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
626 |
|
37758 | 627 |
lemma success_quicksortI: |
37802 | 628 |
assumes "l < Array.length h a" "r < Array.length h a" |
37758 | 629 |
shows "success (quicksort a l r) h" |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
630 |
using assms |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
631 |
proof (induct a l r arbitrary: h rule: quicksort.induct) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
632 |
case (1 a l ri h) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
633 |
thus ?case |
28145 | 634 |
unfolding quicksort.simps [of a l ri] |
37758 | 635 |
apply (auto intro!: success_ifI success_bindI' success_returnI success_nthI success_updI success_assertI success_partitionI) |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
636 |
apply (frule partition_returns_index_in_bounds) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
637 |
apply auto |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
638 |
apply (frule partition_returns_index_in_bounds) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
639 |
apply auto |
40671 | 640 |
apply (auto elim!: effect_assertE dest!: partition_length_remains length_remains) |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
641 |
apply (subgoal_tac "Suc r \<le> ri \<or> r = ri") |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
642 |
apply (erule disjE) |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
643 |
apply auto |
28145 | 644 |
unfolding quicksort.simps [of a "Suc ri" ri] |
37758 | 645 |
apply (auto intro!: success_ifI success_returnI) |
27656
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
646 |
done |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
647 |
qed |
d4f6e64ee7cc
added verification framework for the HeapMonad and quicksort as example for this framework
bulwahn
parents:
diff
changeset
|
648 |
|
27674 | 649 |
|
650 |
subsection {* Example *} |
|
651 |
||
37792 | 652 |
definition "qsort a = do { |
37798
0b0570445a2a
proper merge of operation changes and generic do-syntax
haftmann
parents:
37797
diff
changeset
|
653 |
k \<leftarrow> Array.len a; |
27674 | 654 |
quicksort a 0 (k - 1); |
655 |
return a |
|
37792 | 656 |
}" |
27674 | 657 |
|
35041
6eb917794a5c
avoid upto in generated code (is infix operator in library.ML)
haftmann
parents:
32960
diff
changeset
|
658 |
code_reserved SML upto |
6eb917794a5c
avoid upto in generated code (is infix operator in library.ML)
haftmann
parents:
32960
diff
changeset
|
659 |
|
27674 | 660 |
ML {* @{code qsort} (Array.fromList [42, 2, 3, 5, 0, 1705, 8, 3, 15]) () *} |
661 |
||
38058 | 662 |
export_code qsort checking SML SML_imp OCaml? OCaml_imp? Haskell? Scala? Scala_imp? |
27674 | 663 |
|
37845
b70d7a347964
first roughly working version of Imperative HOL for Scala
haftmann
parents:
37826
diff
changeset
|
664 |
end |