Testing tree structure on 4 graphs

=== Dodecahedron: V=20, E=30, girth=5 ===
  Primal internally 6-connected: YES
  Found 45 distinct 6-edge cuts
Selected layout: sage-spring (edge-length CV^2 = 0.0226)
  Cuts producing trees on both sides: 45/45

=== BuckyBall: V=60, E=90, girth=5 ===
  Found 60 distinct 6-edge cuts
Selected layout: sage-spring (edge-length CV^2 = 0.0184)
  Cuts producing trees on both sides: 60/60

=== TruncatedTet: V=12, E=18, girth=3 ===
  Found 2 distinct 6-edge cuts
Selected layout: sage-spring (edge-length CV^2 = 0.0421)
  Cuts producing trees on both sides: 2/2

=== Tutte: V=46, E=69, girth=4 ===
