#include <stdlib.h>
#include <stdio.h>

#ifndef VOLATILE
#define VOLATILE
#endif

static int i;
int main(int argc, char *argv[]) {
  VOLATILE int  boundary_1 = 0;
  char a[4];   
  VOLATILE int  boundary_2 = 0;

  for(i=0;i<200;i++) {
    a[i] = 'x' + boundary_1 + boundary_2;
    if (boundary_1 != 0) {
      printf ("boundary_1 overwritten!\n");
      exit(1);
    }
    else if (boundary_2 != 0) {
      printf ("boundary_2 overwritten!\n");
      exit(2);
    }
    else if (i > 15) {
	boundary_1 = 1;
	boundary_2 = 1;
	printf ("Cause SIGSEGV here: %s\n", (char *)boundary_2);
    }
  }

  return EXIT_SUCCESS;
}