xbt_assert(!route || *route, "no route between \"%s\" and \"%s\"", src, dst);
xbt_assert(!latency || *latency >= 0.0,
"latency error on route between \"%s\" and \"%s\"", src, dst);
xbt_assert(!route || *route, "no route between \"%s\" and \"%s\"", src, dst);
xbt_assert(!latency || *latency >= 0.0,
"latency error on route between \"%s\" and \"%s\"", src, dst);