更详细的是这样的，

Fitting full model:

initial values not feasible（标红）
note:  default initial values infeasible; starting from B=0

Iteration 0:   log likelihood = -11729.437  (not concave)
Iteration 1:   log likelihood = -10619.693  (not concave)
Iteration 2:   log likelihood = -10285.537  
Iteration 3:   log likelihood = -10075.704  (not concave)
Iteration 4:   log likelihood = -10052.766  (not concave)
Iteration 5:   log likelihood = -10037.313  (not concave)
Iteration 6:   log likelihood = -10025.185  (not concave)
Iteration 7:   log likelihood = -10018.266  (not concave)
Iteration 8:   log likelihood = -10011.135  (not concave)
Iteration 9:   log likelihood = -10004.563  
Iteration 10:  log likelihood = -9976.0759  
Iteration 11:  log likelihood = -9902.9587  
Iteration 12:  log likelihood = -9897.6467  
Iteration 13:  log likelihood = -9892.4206  
Iteration 14:  log likelihood = -9892.1663  
Iteration 15:  log likelihood = -9892.1656