for (exp_sofar=0; exp_sofar < exp_size; exp_size += msg_sofar) {
for(msg_sofar=0; msg_sofar < msg_size; msg_size += res_last) {
for (exp_sofar=0; exp_sofar < exp_size; exp_size += msg_sofar) {
for(msg_sofar=0; msg_sofar < msg_size; msg_size += res_last) {