Iteration 1

History exploration (blue nodes were just explored, red nodes will be explored next):

Domination set of A2 (green nodes are dominated by the red node, frontier nodes have a different shape):

Domination set of B2 (green nodes are dominated by the red node, frontier nodes have a different shape):

Iteration 2

This is the last iteration. B3 is the domiantor.

History exploration (blue nodes were just explored, red nodes will be explored next):

Domination set of B3 (green nodes are dominated by the red node, frontier nodes have a different shape):