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
|
//#define MUTEX
#ifdef MUTEX
#include <pthread.h>
#endif
//global variables
int x = 0;
#ifdef MUTEX
pthread_mutex_t m;
#else
int m=0;
#endif
void t1() {
#ifdef MUTEX
int rc = 0;
rc = pthread_mutex_lock(&m);
assert(0 == rc);
#else
__CPROVER_atomic_begin();
__CPROVER_assume(m==0);
m=1;
__CPROVER_atomic_end();
#endif
x = 7;
#ifdef MUTEX
pthread_mutex_unlock(&m);
#else
m=0;
#endif
}
void t2() {
#ifdef MUTEX
int rc = 0;
rc = pthread_mutex_lock(&m);
assert(0 == rc);
#else
__CPROVER_atomic_begin();
__CPROVER_assume(m==0);
m=1;
__CPROVER_atomic_end();
#endif
x = 0;
x += 1;
#ifdef MUTEX
pthread_mutex_unlock(&m);
#else
m=0;
#endif
}
void check() {
assert(x != 8);
}
int main(){
#ifdef MUTEX
pthread_mutex_init(&m, NULL);
#endif
__CPROVER_ASYNC_1: t1();
__CPROVER_ASYNC_2: t2();
__CPROVER_ASYNC_3: check();
return 0;
}
|
