source: CIVL/examples/pthread/fib_bench_false.cvl@ 325d439

/*****************************************************************************
* SOURCE: This is a translation of a Pthread program from 
* the Pthread benchmarks of SV-COMP 2014.
* https://svn.sosy-lab.org/software/sv-benchmarks/tags/svcomp14/
* FILE: fib_bench_false.cvl
* DESCRIPTION: 
*   Simple program of threads interacting which causes an error when
*   their total reaches a certain value. The fix simply involves changing the output
*   for which an error will be caused; specifically, here error is caused when i or j
*   >=144, the fix has i or j > 144.
* Command line execution:
* civl verify -inputNUM=5 fib_bench_false.cvl
******************************************************************************/

#include <civlc.h>
#include "pthread.cvh"

int i=1, j=1;

$input int NUM;

void *t1(void* arg)
{
  int k = 0;

  for (k = 0; k < NUM; k++)
    i+=j;  
  pthread_exit(NULL, false, NULL, 0); //Different parameters
}

void *t2(void* arg)
{
  int k = 0;

  for (k = 0; k < NUM; k++)
    j+=i;
  pthread_exit(NULL, false, NULL, 0);
}

int main(int argc, char **argv)
{
  pthread_t id1, id2;

  pthread_create(&id1, NULL, t1, NULL);
  pthread_create(&id2, NULL, t2, NULL);

  pthread_join(id1, NULL);  //Added pthread_join, probably error in competition code
  pthread_join(id2, NULL);

  if (i >= 144 || j >= 144) {
    $assert($false, "Incorrect output");
  }
  
  return 0;
}