void* thr1 (void* arg)
{
int count;
usecount = 0;
locked = 0;
release_thr1 = 1;
while(1)
{
if(flag1)
break;
}
do
{
if (__nondet_bool())
{
count = 1;
dummy_release ();
}
else
count = 0;
}
while (count != 0);
dummy_release ();
unregister_chrdev ();
return 0;
}
void* thr1 (void* arg)
{
void* rval;
int count;
usecount = 0;
locked = 0;
release_thr1 = 1;
while(1)
{
if(flag1)
break;
}
do
{
rval = (void*)__VERIFIER_nondet_int();
if (rval == 0)
{
count = 1;
dummy_release ();
}
else
count = 0;
}
while (count != 0);
dummy_release ();
unregister_chrdev ();
return 0;
}
int main ()
{
int rval;
int size;
struct file my_file;
char *buffer; /* we do not model this buffer */
struct inode inode;
unsigned int count;
unsigned char random;
int lock_held = 0;
dummy_major = register_chrdev (0, "dummy");
inode.i_rdev = dummy_major << MINORBITS;
init_module ();
/* assign arbitrary values */
my_file.f_mode = nondet_uint ();
my_file.f_pos = nondet_uint ();
do
{
random = nondet_uchar ();
__CPROVER_assume (0 <= random && random <= 3);
switch (random)
{
case 1:
rval = dummy_open (&inode, &my_file);
if (rval == 0)
lock_held = TRUE;
break;
case 2:
__CPROVER_assume (lock_held);
count = dummy_read (&my_file, buffer, BUF_SIZE);
break;
case 3:
dummy_release (&inode, &my_file);
lock_held = FALSE;
break;
default:
break;
}
}
while (random || lock_held);
cleanup_module ();
unregister_chrdev (dummy_major, "dummy");
return 0;
}
