Iteration 0: [1.0, 0.0, 0.0, 0.0] position: 0
Iteration 1: [1.0, 0.0, 0.0, 0.0] position: 0
Iteration 2: [0.0, 1.0, 0.0, 0.0] position: 1
Iteration 3: [0.0, 0.0, 1.0, 0.0] position: 2
iter check failed
pbt result: [0, 0, 0, 0]
pbt check failed
