fprintf(stderr, "Computation finished after @ %s @ ms. %d sparks created, %d sparks ignored. Check %s for details.\n",
time_string, sparksCreated, sparksIgnored, gr_filename);
fprintf(stderr, "Computation finished after @ %s @ ms. %d sparks created, %d sparks ignored. Check %s for details.\n",
time_string, sparksCreated, sparksIgnored, gr_filename);