1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/**************************************************************************/
/* */
/* The Why platform for program certification */
/* Copyright (C) 2002-2008 */
/* Romain BARDOU */
/* Jean-Franois COUCHOT */
/* Mehdi DOGGUY */
/* Jean-Christophe FILLITRE */
/* Thierry HUBERT */
/* Claude MARCH */
/* Yannick MOY */
/* Christine PAULIN */
/* Yann RGIS-GIANAS */
/* Nicolas ROUSSET */
/* Xavier URBAIN */
/* */
/* This software is free software; you can redistribute it and/or */
/* modify it under the terms of the GNU General Public */
/* License version 2, as published by the Free Software Foundation. */
/* */
/* This software is distributed in the hope that it will be useful, */
/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. */
/* */
/* See the GNU General Public License version 2 for more details */
/* (enclosed in the file GPL). */
/* */
/**************************************************************************/
/*@ ensures x==4 => \result==2 */
int f1 (int x){
int y ;
switch (x) {
case 0 :
case 1 :
y=1 ;
y=4;
break;
case 2:
case 4:
y=2; break;
case 3:
y=3; break;
default :
y=4;
y=5;
}
return y;
}
/*@ ensures x==4 => \result==2 */
int f1a (int x){
int y ;
switch (x) {
case 0 :
case 1 :
y=1 ;
y=4;
break;
case 2:
case 4:
y=2; return y;
case 3:
y=3; return y;
default :
y=4;
}
y=5;
return y;
}
/*@ ensures \result==4 */
int f2 (int x){
int y ;
switch (x) {
case 0 :
case 1 :
y=1 ;
case 2:
case 4:
y=2;
case 3:
y=3;
default :
y=4;
}
return y;
}
/*@ ensures \result==4 */
int f3 (int x){
int y;
switch (x) {
case 0 :
case 1 :
y=1 ;
default :
y=2;
case 3 :
y=3;
case 2 :
y=4;
}
return y;
}
/*@ ensures \result==0 */
int f4 (int x){
int y = 0;
switch (x) {
case 0 :
if (x==0) break ;
y = 1;
}
return y;
}
/*@ ensures x==1 => \result==1 */
int f5 (int x){
int y = 0;
switch (x) {
case 1 :
while (x>0) break ;
y = 1;
}
return y;
}
/*@ ensures x==2 => \result==1 */
int f6 (int x){
int y = 0;
switch (x) {
case 1+1 :
y = 1;
}
return y;
}
enum {A=5};
/*@ ensures x==A => \result==1 */
int f7 (int x){
int y = 0;
switch (x) {
case A :
y = 1;
}
return y;
}
/*@ ensures x==0 && y>=1 => \result == 0
@*/
int f8 (int x, int y){
int z = 0;
switch (x) {
case 0:
if (y >= 1) break;
z = 1;
break;
default:
z = 2;
}
return z;
}
|
