after init: []
after cluster 1: [0.004-4.9745]
after cluster 3: [0.004-4.9745, 9.604-12.044]
after cluster 2: [0.004-5.004, 9.604-12.044]
after cluster 1 again: [0.004-5.004, 9.604-12.044]
after cluster 2 again: [0.004-12.044]