Check if 0 vertex graph crashes.
Check seeded 1-vertex graph, no iterations.
3 4
Check if 0 vertex graph crashes without a seed.
Check unseeded 1-vertex graph.
Check 2-vertex graph.
Check negative maxiter.
Check negative temp_max.
Check negative temp_min.
Check negative temp_init.
Check temp_init not between min and max.
Check too many rows in seed.
Check too many columns in seed.
