Good convergence to solution, but overly slow decrease in objective function

[lrschoen23]

Are there options that will make IPOPT less timid when moving into an infeasible region to find better objective values? I'm seeing IPOPT converge to a good solution that I know to be correct, and progress toward the solution is very steady throughout the solve. That being said, the progress is slower than I'd expect and the number of iterations seems high. For context, the problem being solved is a highly sparse optimal control problem. Output is below. Any ideas/suggestions are welcome!

******************************************************************************
This program contains Ipopt, a library for large-scale nonlinear optimization.
 Ipopt is released as open source code under the Eclipse Public License (EPL).
         For more information visit http://projects.coin-or.org/Ipopt
******************************************************************************

This is Ipopt version 3.13.2, running with linear solver mumps.
NOTE: Other linear solvers might be more efficient (see Ipopt documentation).

Number of nonzeros in equality constraint Jacobian...:     3018
Number of nonzeros in inequality constraint Jacobian.:       79
Number of nonzeros in Lagrangian Hessian.............:    32131

Total number of variables............................:      253
					 variables with only lower bounds:        0
				variables with lower and upper bounds:       78
					 variables with only upper bounds:        0
Total number of equality constraints.................:      178
Total number of inequality constraints...............:       27
        inequality constraints with only lower bounds:        1
   inequality constraints with lower and upper bounds:       26
        inequality constraints with only upper bounds:        0

iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
   0  4.6760070e+06 9.99e+02 9.91e+00  -1.0 0.00e+00    -  0.00e+00 0.00e+00   0
   1  4.6741898e+06 3.86e+02 1.21e+02  -1.0 8.53e-01   0.0 6.12e-01 6.12e-01h  1
   2  4.6742380e+06 3.73e+02 1.33e+02  -1.0 5.55e-01   3.1 1.12e-02 3.50e-02f  1
   3  4.6746325e+06 2.02e+02 1.30e+03  -1.0 3.15e-01   3.6 8.10e-03 4.58e-01f  1
   4  4.6746588e+06 1.92e+02 1.30e+03  -1.0 1.80e-01   4.0 2.90e-01 4.67e-02h  1
   5  4.6747290e+06 1.71e+02 1.21e+03  -1.0 1.96e-01   3.5 5.96e-02 1.11e-01h  1
   6  4.6747304e+06 1.70e+02 1.20e+03  -1.0 1.68e-01   3.9 1.78e-01 2.80e-03h  1
   7  4.6747620e+06 1.59e+02 1.43e+03  -1.0 2.00e-01   4.4 5.26e-02 6.78e-02h  1
   8  4.6748092e+06 1.43e+02 1.45e+03  -1.0 1.35e-01   3.9 4.25e-01 1.01e-01h  1
   9  4.6748112e+06 1.42e+02 2.84e+03  -1.0 1.36e-01   4.3 2.11e-01 4.14e-03h  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
  10  4.6749584e+06 9.76e+01 1.69e+03  -1.0 1.49e-01   3.8 6.90e-02 3.14e-01f  1
  11  4.6749600e+06 9.72e+01 6.31e+03  -1.0 1.03e-01   4.3 5.43e-01 4.54e-03h  1
  12  4.6752123e+06 1.60e+01 3.83e+03  -1.0 1.08e-01   3.8 2.30e-02 8.34e-01f  1
  13  4.6752340e+06 1.06e+01 6.16e+02  -1.0 6.63e-02   4.2 1.00e+00 3.39e-01h  1
  14  4.6752331e+06 1.02e+01 7.32e+02  -1.0 3.68e-02   3.7 1.90e-01 2.99e-02h  1
  15  4.6752744e+06 1.25e-02 5.90e+02  -1.0 4.11e-02   4.2 1.00e+00 1.00e+00f  1
  16  4.6751764e+06 5.79e-05 6.58e+01  -1.0 1.37e-02   3.7 1.00e+00 1.00e+00f  1
  17  4.6751454e+06 8.79e-05 4.56e+01  -1.0 3.57e-03   4.1 1.00e+00 1.00e+00f  1
  18  4.6750436e+06 1.44e-05 1.52e+01  -1.0 2.39e-03   3.6 1.00e+00 1.00e+00f  1
  19  4.6746851e+06 2.78e-04 1.09e+01  -1.0 7.67e-03   3.2 1.00e+00 1.00e+00f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
  20  4.6745639e+06 2.19e-05 1.00e+01  -1.0 2.59e-03   3.6 1.00e+00 1.00e+00f  1
  21  4.6742644e+06 1.16e-04 2.61e+01  -1.0 6.41e-03   3.1 1.00e+00 1.00e+00f  1
  22  4.6741151e+06 1.86e-05 1.07e+01  -1.0 3.19e-03   3.5 1.00e+00 1.00e+00f  1
  23  4.6736986e+06 1.17e-04 9.99e+00  -1.0 8.91e-03   3.0 1.00e+00 1.00e+00f  1
  24  4.6724250e+06 6.76e-04 1.02e+01  -1.0 2.72e-02   2.6 1.00e+00 1.00e+00f  1
  25  4.6720123e+06 9.33e-05 2.00e+01  -1.0 8.83e-03   3.0 1.00e+00 1.00e+00f  1
  26  4.6697480e+06 9.95e-04 4.54e+01  -1.0 4.84e-02   2.5 1.00e+00 1.00e+00f  1
  27  4.6692190e+06 1.04e-04 1.00e+01  -1.0 1.13e-02   2.9 1.00e+00 1.00e+00f  1
  28  4.6681409e+06 5.13e-04 3.82e+01  -1.0 2.31e-02   2.5 1.00e+00 1.00e+00f  1
  29  4.6675575e+06 9.63e-05 1.10e+01  -1.0 1.25e-02   2.9 1.00e+00 1.00e+00f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
  30  4.6657219e+06 7.59e-04 1.03e+01  -1.0 3.93e-02   2.4 1.00e+00 1.00e+00f  1
  31  4.6651779e+06 9.56e-05 2.61e+01  -1.0 1.16e-02   2.8 1.00e+00 1.00e+00f  1
  32  4.6632583e+06 8.01e-04 1.33e+01  -1.0 4.11e-02   2.4 1.00e+00 1.00e+00f  1
  33  4.6618950e+06 2.35e-04 6.39e+01  -1.0 2.92e-02   2.8 1.00e+00 1.00e+00f  1
  34  4.6595495e+06 1.04e-03 1.04e+01  -1.0 5.02e-02   2.3 1.00e+00 1.00e+00f  1
  35  4.6584100e+06 2.04e-04 2.19e+01  -1.0 2.44e-02   2.7 1.00e+00 1.00e+00f  1
  36  4.6580236e+06 2.66e-05 1.22e+01  -1.0 8.26e-03   3.2 1.00e+00 1.00e+00f  1
  37  4.6566445e+06 2.50e-04 3.10e+01  -1.0 2.95e-02   2.7 1.00e+00 1.00e+00f  1
  38  4.6539542e+06 1.36e-03 1.46e+01  -1.0 5.75e-02   2.2 1.00e+00 1.00e+00f  1
  39  4.6466487e+06 9.66e-03 2.27e+01  -1.0 1.56e-01   1.7 1.00e+00 1.00e+00f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
  40  4.6295946e+06 5.35e-02 3.97e+01  -1.0 3.65e-01   1.3 1.00e+00 1.00e+00f  1
  41  4.5533540e+06 7.63e-01 9.90e+00  -1.0 1.63e+00   0.8 1.00e+00 1.00e+00f  1
  42  4.5523552e+06 5.46e-01 3.61e+01  -1.0 3.05e-01   0.3 4.25e-01 2.95e-01f  1
  43  4.5490591e+06 4.11e-02 9.63e+01  -1.0 7.05e-02   0.7 1.00e+00 1.00e+00f  1
  44  4.4895956e+06 4.67e-01 7.62e+01  -1.0 5.48e+00   0.3 2.08e-01 2.32e-01f  1
  45  4.4870965e+06 1.60e-03 5.15e+01  -1.0 5.34e-02   2.5 1.00e+00 1.00e+00f  1
  46  4.4862369e+06 6.24e-05 3.67e+01  -1.0 1.84e-02   2.9 1.00e+00 1.00e+00f  1
  47  4.4845376e+06 2.48e-04 9.92e+00  -1.0 3.63e-02   2.4 1.00e+00 1.00e+00f  1
  48  4.4794427e+06 2.26e-03 9.91e+00  -1.0 1.09e-01   2.0 1.00e+00 1.00e+00f  1
  49  4.4676871e+06 1.51e-02 3.04e+01  -1.0 2.51e-01   1.5 1.00e+00 1.00e+00f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
  50  4.4645026e+06 1.60e-02 9.34e+01  -1.0 6.81e-02   1.0 1.00e+00 1.00e+00f  1
  51  4.4579568e+06 2.53e-03 1.73e+02  -1.0 1.40e-01   2.3 1.00e+00 1.00e+00f  1
  52  4.4556226e+06 1.13e-03 6.70e+01  -1.0 4.99e-02   1.9 1.00e+00 1.00e+00f  1
  53  4.4527162e+06 4.15e-03 8.61e+01  -1.0 6.22e-02   1.4 1.00e+00 1.00e+00f  1
  54  4.3949315e+06 3.53e-01 9.87e+00  -1.0 1.24e+00   0.9 1.00e+00 1.00e+00f  1
  55  4.3913435e+06 1.35e-01 9.77e+01  -1.0 7.67e-02   0.4 1.00e+00 1.00e+00f  1
  56  4.3898922e+06 1.75e-04 2.81e+01  -1.0 3.10e-02   2.7 1.00e+00 1.00e+00f  1
  57  4.3868360e+06 8.02e-04 9.90e+00  -1.0 6.54e-02   2.2 1.00e+00 1.00e+00f  1
  58  4.3756918e+06 1.03e-02 1.20e+01  -1.0 2.38e-01   1.7 1.00e+00 1.00e+00f  1
  59  4.3752023e+06 6.46e-05 1.13e+01  -1.0 1.05e-02   3.0 1.00e+00 1.00e+00f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
  60  4.3738816e+06 1.59e-04 1.01e+01  -1.0 2.82e-02   2.6 1.00e+00 1.00e+00f  1
  61  4.3700219e+06 1.41e-03 9.87e+00  -1.0 8.25e-02   2.1 1.00e+00 1.00e+00f  1
  62  4.3685354e+06 1.72e-03 8.78e+01  -1.0 3.18e-02   1.6 1.00e+00 1.00e+00f  1
  63  4.3678731e+06 4.11e-05 1.20e+01  -1.0 1.42e-02   2.9 1.00e+00 1.00e+00f  1
  64  4.3667705e+06 1.45e-04 3.88e+01  -1.0 2.36e-02   2.5 1.00e+00 1.00e+00f  1
  65  4.3658007e+06 7.43e-05 4.27e+01  -1.0 2.07e-02   2.9 1.00e+00 1.00e+00f  1
  66  4.3646091e+06 1.80e-04 4.11e+01  -1.0 2.55e-02   2.4 1.00e+00 1.00e+00f  1
  67  4.3591171e+06 2.91e-03 9.90e+00  -1.0 1.17e-01   1.9 1.00e+00 1.00e+00f  1
  68  4.3591197e+06 3.05e-06 2.72e+02  -1.0 2.97e-04   6.0 1.00e+00 1.00e+00h  1
  69  4.3591182e+06 2.67e-08 9.93e+00  -1.0 3.23e-05   5.5 1.00e+00 1.00e+00f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
  70  4.3591137e+06 8.03e-08 9.90e+00  -1.0 9.71e-05   5.0 1.00e+00 1.00e+00f  1
  71  4.3591000e+06 2.41e-07 9.91e+00  -1.0 2.92e-04   4.5 1.00e+00 1.00e+00f  1
  72  4.3590598e+06 7.12e-07 1.09e+01  -1.0 8.61e-04   4.1 1.00e+00 1.00e+00f  1
  73  4.3589372e+06 2.17e-06 9.89e+00  -1.0 2.62e-03   3.6 1.00e+00 1.00e+00f  1
  74  4.3585196e+06 1.56e-05 1.12e+01  -1.0 8.93e-03   3.1 1.00e+00 1.00e+00f  1
  75  4.3573958e+06 1.22e-04 1.01e+01  -1.0 2.40e-02   2.6 1.00e+00 1.00e+00f  1
  76  4.3303884e+06 3.82e-02 7.00e+02  -1.0 2.16e+00   2.1 8.87e-01 2.67e-01f  1
  77  4.3184354e+06 2.25e-02 1.19e+01  -1.0 2.56e-01   1.7 1.00e+00 1.00e+00f  1
  78  4.3168284e+06 1.57e-02 9.41e+01  -1.0 3.44e-02   1.2 1.00e+00 1.00e+00f  1
  79  4.3135456e+06 6.80e-02 9.59e+01  -1.0 7.02e-02   0.7 1.00e+00 1.00e+00f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
  80  4.3129169e+06 4.51e-05 1.19e+01  -1.0 1.34e-02   2.9 1.00e+00 1.00e+00f  1
  81  4.3118886e+06 1.39e-04 4.04e+01  -1.0 2.20e-02   2.5 1.00e+00 1.00e+00f  1
  82  4.3067297e+06 2.57e-03 1.08e+01  -1.0 1.10e-01   2.0 1.00e+00 1.00e+00f  1
  83  4.3025008e+06 1.37e-03 1.16e+02  -1.0 9.04e-02   2.4 1.00e+00 1.00e+00f  1
  84  4.3016872e+06 8.50e-05 1.22e+01  -1.0 1.74e-02   2.8 1.00e+00 1.00e+00f  1
  85  4.2969834e+06 1.64e-03 1.13e+02  -1.0 1.01e-01   2.4 1.00e+00 1.00e+00f  1
  86  4.2949167e+06 1.41e-03 6.76e+01  -1.0 4.42e-02   1.9 1.00e+00 1.00e+00f  1
  87  4.2679205e+06 7.80e-02 3.75e+01  -1.0 5.77e-01   1.4 1.00e+00 1.00e+00f  1
  88  4.2649223e+06 5.04e-02 9.36e+01  -1.0 6.41e-02   0.9 1.00e+00 1.00e+00f  1
  89  4.2645431e+06 2.22e-05 1.19e+01  -1.0 8.11e-03   3.2 1.00e+00 1.00e+00f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
  90  4.2638012e+06 7.97e-05 2.79e+01  -1.0 1.59e-02   2.7 1.00e+00 1.00e+00f  1
  91  4.2622698e+06 4.83e-04 4.99e+01  -1.0 3.27e-02   2.2 1.00e+00 1.00e+00f  1
  92  4.2550863e+06 7.64e-03 2.23e+01  -1.0 1.54e-01   1.7 1.00e+00 1.00e+00f  1
  93  4.2369752e+06 2.45e-02 4.58e+02  -1.0 9.28e-01   2.2 1.00e+00 4.17e-01f  1
  94  4.2353031e+06 7.55e-04 3.16e+01  -1.0 3.58e-02   2.6 1.00e+00 1.00e+00f  1
  95  4.2320590e+06 2.41e-03 1.53e+01  -1.0 6.94e-02   2.1 1.00e+00 1.00e+00f  1
  96  4.2261070e+06 2.96e-03 3.03e+02  -1.0 1.27e-01   2.5 1.00e+00 1.00e+00f  1
  97  4.2255529e+06 9.99e-05 1.09e+01  -1.0 1.18e-02   3.0 1.00e+00 1.00e+00f  1
  98  4.2240561e+06 5.47e-04 9.80e+00  -1.0 3.20e-02   2.5 1.00e+00 1.00e+00f  1
  99  4.2196885e+06 4.81e-03 9.54e+00  -1.0 9.34e-02   2.0 1.00e+00 1.00e+00f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 100  4.2171514e+06 1.20e-02 8.06e+01  -1.0 5.43e-02   1.5 1.00e+00 1.00e+00f  1
 101  4.1781733e+06 4.26e-01 9.46e+00  -1.0 8.34e-01   1.1 1.00e+00 1.00e+00f  1
 102  4.1708739e+06 3.33e-01 9.27e+01  -1.0 1.56e-01   0.6 1.00e+00 1.00e+00f  1
 103  4.1671176e+06 5.34e-01 9.56e+01  -1.0 2.17e-01   0.1 5.89e-01 6.38e-01f  1
 104  4.1419393e+06 7.58e-02 3.44e+01  -1.0 5.38e-01   1.4 1.00e+00 1.00e+00f  1
 105  4.1366762e+06 1.01e-01 8.78e+01  -1.0 1.13e-01   1.0 1.00e+00 1.00e+00f  1
 106  4.1280765e+06 6.51e-03 2.23e+02  -1.0 1.84e-01   2.3 1.00e+00 1.00e+00f  1
 107  4.1258398e+06 4.93e-03 6.82e+01  -1.0 4.78e-02   1.8 1.00e+00 1.00e+00f  1
 108  4.1223993e+06 6.48e+00 1.00e+02  -1.0 3.32e-01    -  8.99e-01 1.00e+00f  1
 109  4.1115081e+06 1.11e+00 2.60e+02  -1.0 2.80e-01   2.2 1.00e+00 8.31e-01f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 110  4.1091035e+06 3.36e-03 7.06e+01  -1.0 5.14e-02   1.8 1.00e+00 1.00e+00f  1
 111  4.0937519e+06 1.82e-02 3.71e+02  -1.0 7.85e-01   2.2 1.00e+00 4.18e-01f  1
 112  4.0924783e+06 5.68e-04 1.10e+01  -1.0 2.72e-02   2.6 1.00e+00 1.00e+00f  1
 113  4.0920139e+06 5.26e-05 1.07e+01  -1.0 9.93e-03   3.0 1.00e+00 1.00e+00f  1
 114  4.0905095e+06 4.70e-04 1.15e+01  -1.0 3.22e-02   2.6 1.00e+00 1.00e+00f  1
 115  4.0814740e+06 1.14e-02 1.17e+02  -1.0 1.93e-01   2.1 1.00e+00 1.00e+00f  1
 116  4.0693430e+06 5.02e-02 1.03e+01  -1.0 2.59e-01   1.6 1.00e+00 1.00e+00f  1
 117  4.0528010e+06 4.80e+01 1.50e+01  -1.0 7.04e+00    -  1.76e-01 1.66e-01f  1
 118  4.0249674e+06 1.98e+01 1.32e+01  -1.0 1.00e+00   1.1 7.47e-01 5.94e-01f  1
 119  3.9785207e+06 2.02e+01 5.30e+01  -1.0 1.10e+01   0.6 1.80e-01 8.99e-02f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 120  3.9604675e+06 1.28e+01 5.26e+01  -1.0 8.41e-01   1.1 1.00e+00 4.59e-01f  1
 121  3.9542846e+06 1.44e+00 9.06e+01  -1.0 1.41e-01   0.6 1.00e+00 1.00e+00f  1
 122  3.9495213e+06 1.26e+00 1.54e+02  -1.0 8.00e-01   1.9 1.00e+00 1.27e-01f  1
 123  3.9487934e+06 1.07e+01 1.38e+02  -1.0 3.92e+00    -  1.05e-01 1.08e-01f  1
 124  3.9444665e+06 1.63e-01 6.94e+01  -1.0 1.06e-01   1.4 4.32e-01 1.00e+00f  1
 125  3.9331698e+06 2.34e-01 2.76e+02  -1.0 1.28e+00   1.9 6.55e-01 1.88e-01f  1
 126  3.9287644e+06 1.57e-01 1.92e+02  -1.0 9.42e-02   1.4 4.89e-01 1.00e+00f  1
 127  3.9184424e+06 4.22e-01 4.89e+02  -1.0 9.11e-01   1.8 1.00e+00 2.42e-01f  1
 128  3.9160250e+06 4.69e-02 7.12e+01  -1.0 5.17e-02   2.2 8.57e-01 1.00e+00f  1
 129  3.8999050e+06 9.10e-01 2.44e+03  -1.0 1.10e+01   1.8 3.18e-01 3.14e-02f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 130  3.8867785e+06 7.42e-01 3.08e+02  -1.0 2.81e-01   1.3 8.90e-01 1.00e+00f  1
 131  3.8528104e+06 5.27e+00 2.65e+03  -1.0 4.85e+00   1.7 8.85e-01 1.50e-01f  1
 132  3.8480004e+06 1.08e-01 1.10e+02  -1.0 1.03e-01   1.2 9.66e-01 1.00e+00f  1
 133  3.8475502e+06 2.76e-02 1.21e+02  -1.0 2.72e-02   2.6 1.00e+00 1.00e+00f  1
 134  3.8423593e+06 1.07e-01 7.16e+01  -1.0 1.11e-01   2.1 1.00e+00 1.00e+00f  1
 135  3.8411360e+06 8.16e-03 1.15e+01  -1.0 2.62e-02   2.5 1.00e+00 1.00e+00f  1
 136  3.8343985e+06 1.36e-01 8.88e+01  -1.0 1.44e-01   2.0 1.00e+00 1.00e+00f  1
 137  3.8306426e+06 1.18e-01 5.78e+01  -1.0 8.03e-02   1.6 1.00e+00 1.00e+00f  1
 138  3.8091246e+06 2.10e+00 2.64e+01  -1.0 4.60e-01   1.1 1.00e+00 1.00e+00f  1
 139  3.7211142e+06 2.89e+01 1.77e+02  -1.0 6.03e+00   0.6 1.00e+00 3.12e-01f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 140  3.7178975e+06 1.18e-01 9.72e+01  -1.0 6.88e-02   0.1 9.64e-01 1.00e+00f  1
 141  3.7177928e+06 1.03e-01 1.44e+02  -1.0 2.38e-02   2.4 1.00e+00 1.21e-01f  1
 142  3.7151388e+06 5.07e-02 4.29e+01  -1.0 5.68e-02   1.9 1.00e+00 1.00e+00f  1
 143  3.7124307e+06 1.41e-02 3.27e+01  -1.0 5.79e-02   2.3 1.00e+00 1.00e+00f  1
 144  3.7097814e+06 5.56e-02 4.76e+01  -1.0 5.67e-02   1.8 1.00e+00 1.00e+00f  1
 145  3.7064331e+06 1.76e-02 4.21e+01  -1.0 7.16e-02   2.3 1.00e+00 1.00e+00f  1
 146  3.7044530e+06 4.86e-02 6.22e+01  -1.0 4.23e-02   1.8 1.00e+00 1.00e+00f  1
 147  3.7001344e+06 1.95e-01 7.32e+01  -1.0 9.24e-02   1.3 1.00e+00 1.00e+00f  1
 148  3.6622384e+06 3.27e+00 7.46e+01  -1.0 2.34e+00   0.8 1.00e+00 3.46e-01f  1
 149  3.6583157e+06 6.47e-02 4.88e+01  -1.0 8.39e-02   2.2 1.00e+00 1.00e+00f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 150  3.6551604e+06 8.39e-02 5.54e+01  -1.0 6.75e-02   1.7 1.00e+00 1.00e+00f  1
 151  3.6497463e+06 5.45e-02 6.39e+01  -1.0 1.16e-01   2.1 1.00e+00 1.00e+00f  1
 152  3.6485571e+06 7.47e-03 8.74e+00  -1.0 2.54e-02   2.5 1.00e+00 1.00e+00f  1
 153  3.6466224e+06 3.02e-02 3.67e+01  -1.0 4.14e-02   2.1 1.00e+00 1.00e+00f  1
 154  3.6443104e+06 7.97e-02 7.15e+01  -1.0 4.94e-02   1.6 1.00e+00 1.00e+00f  1
 155  3.6222550e+06 1.55e+00 2.73e+01  -1.0 4.72e-01   1.1 1.00e+00 1.00e+00f  1
 156  3.6194588e+06 7.08e-03 6.78e+01  -1.0 5.98e-02   2.4 1.00e+00 1.00e+00f  1
 157  3.6177347e+06 2.54e-02 5.52e+01  -1.0 3.69e-02   2.0 1.00e+00 1.00e+00f  1
 158  3.6109583e+06 3.09e+00 9.89e+01  -1.0 2.88e-01    -  8.28e-01 1.00e+00f  1
 159  3.6098113e+06 3.03e-03 3.94e+01  -1.0 5.40e-02   2.4 1.00e+00 1.00e+00f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 160  3.5981691e+06 3.40e-02 1.34e+02  -1.0 7.93e-01   1.9 1.00e+00 3.14e-01f  1
 161  3.5917576e+06 7.16e-01 9.97e+01  -1.0 1.37e-01    -  9.43e-01 1.00e+00f  1
 162  3.5905174e+06 5.05e-01 9.05e+01  -1.0 2.08e-01   1.4 2.59e-01 3.05e-01f  1
 163  3.5871842e+06 1.11e+01 1.00e+02  -1.0 4.46e-01    -  9.49e-01 1.00e+00f  1
 164  3.5825604e+06 1.12e+01 1.00e+02  -1.0 2.86e+00    -  6.71e-02 4.52e-02f  1
 165  3.5637401e+06 7.07e+00 6.68e+01  -1.0 1.09e+00   1.0 8.62e-01 3.70e-01f  1
 166  3.5558578e+06 9.43e-03 1.97e+02  -1.0 1.69e-01   2.3 1.00e+00 1.00e+00f  1
 167  3.5548735e+06 2.40e-04 1.07e+01  -1.0 2.10e-02   2.7 1.00e+00 1.00e+00f  1
 168  3.5419436e+06 1.98e-02 3.42e+02  -1.0 2.91e-01   2.2 1.00e+00 9.49e-01f  1
 169  3.5405975e+06 5.12e-04 2.75e+01  -1.0 2.88e-02   2.7 1.00e+00 1.00e+00f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 170  3.5354863e+06 4.76e-03 5.79e+01  -1.0 1.09e-01   2.2 1.00e+00 1.00e+00f  1
 171  3.5281060e+06 8.22e+00 1.01e+02  -1.0 4.14e-01    -  8.41e-01 1.00e+00f  1
 172  3.5263659e+06 3.98e-04 3.74e+01  -1.0 3.72e-02   2.6 1.00e+00 1.00e+00f  1
 173  3.5242383e+06 9.20e-04 4.12e+01  -1.0 4.55e-02   2.1 1.00e+00 1.00e+00f  1
 174  3.5222091e+06 5.90e-04 4.55e+01  -1.0 4.34e-02   2.6 1.00e+00 1.00e+00f  1
 175  3.5001900e+06 2.26e+01 1.43e+01  -1.0 2.81e+00    -  1.49e-01 2.16e-01f  1
 176  3.4995315e+06 2.07e-03 4.19e+01  -1.0 4.67e-02   3.0 1.00e+00 1.00e+00f  1
 177  3.4983849e+06 1.86e-04 2.67e+01  -1.0 2.45e-02   2.5 9.97e-01 1.00e+00f  1
 178  3.4855762e+06 1.94e-02 1.70e+02  -1.0 2.74e-01   2.0 1.00e+00 1.00e+00f  1
 179  3.4829940e+06 2.69e-03 7.96e+01  -1.0 5.52e-02   1.5 1.00e+00 1.00e+00f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 180  3.4238489e+06 6.06e-01 4.26e+01  -1.0 1.26e+00   1.1 1.00e+00 1.00e+00f  1
 181  3.4216251e+06 3.47e-03 2.47e+01  -1.0 4.76e-02   2.4 1.00e+00 1.00e+00f  1
 182  3.4184895e+06 5.05e+01 4.00e+01  -1.0 3.61e+00    -  2.27e-01 5.34e-01f  1
 183  3.4182390e+06 3.66e+01 1.85e+02  -1.0 1.50e+00   2.8 5.96e-02 2.87e-01f  1
 184  3.4182388e+06 3.63e+01 1.98e+02  -1.0 1.02e+00   3.3 2.93e-02 9.14e-03h  1
 185  3.4182196e+06 3.35e+01 2.20e+02  -1.0 8.62e-01   2.8 3.13e-01 7.91e-02f  1
 186  3.4182205e+06 3.10e+01 2.81e+02  -1.0 7.97e-01   3.2 2.16e-01 7.58e-02h  1
 187  3.4183678e+06 1.89e+01 2.81e+02  -1.0 5.97e-01   2.7 6.80e-01 4.70e-01h  1
 188  3.4183608e+06 1.59e+01 2.40e+02  -1.0 3.10e-01   2.2 1.25e-01 1.67e-01h  1
 189  3.4169526e+06 8.49e+00 1.18e+02  -1.0 2.59e-01   1.8 5.63e-01 5.42e-01f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 190  3.4104337e+06 8.73e-01 1.02e+02  -1.0 2.76e-01    -  6.06e-01 1.00e+00f  1
 191  3.4055772e+06 8.06e-02 7.74e+01  -1.0 1.04e-01   1.3 9.00e-01 1.00e+00f  1
 192  3.4043286e+06 8.80e-04 1.12e+01  -1.0 2.67e-02   2.6 1.00e+00 1.00e+00f  1
 193  3.4011244e+06 4.85e-03 9.54e+00  -1.0 6.85e-02   2.1 1.00e+00 1.00e+00f  1
 194  3.3946870e+06 2.65e+00 1.00e+02  -1.0 2.34e-01    -  9.27e-01 1.00e+00f  1
 195  3.3840555e+06 2.52e-02 1.06e+01  -1.0 2.27e-01   1.7 1.00e+00 1.00e+00f  1
 196  3.2848473e+06 7.88e+01 9.67e+01  -1.0 2.12e+00    -  4.93e-01 1.00e+00f  1
 197  3.2823988e+06 1.63e-03 4.68e+01  -1.0 7.34e-02   2.1 1.00e+00 1.00e+00f  1
 198  3.2800575e+06 1.08e-03 5.39e+01  -1.0 5.01e-02   2.5 1.00e+00 1.00e+00f  1
 199  3.2698104e+06 1.59e-02 1.25e+02  -1.0 2.19e-01   2.0 1.00e+00 1.00e+00f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 200  3.2658874e+06 1.57e+01 1.06e+01  -1.0 1.09e+00    -  3.99e-01 5.59e-01f  1
 201  3.2638043e+06 7.77e-04 1.72e+01  -1.0 4.55e-02   2.5 1.00e+00 1.00e+00f  1
 202  3.2610521e+06 1.20e-03 4.58e+01  -1.0 5.89e-02   2.0 1.00e+00 1.00e+00f  1
 203  3.2586165e+06 8.70e-04 2.66e+01  -1.0 5.21e-02   2.4 1.00e+00 1.00e+00f  1
 204  3.2390047e+06 5.44e-02 3.00e+02  -1.0 8.13e-01   1.9 1.00e+00 5.16e-01f  1
 205  3.2347264e+06 5.22e-03 7.32e+01  -1.0 9.15e-02   1.5 1.00e+00 1.00e+00f  1
 206  3.1739422e+06 5.04e+01 8.85e+01  -1.0 2.18e+00    -  5.38e-01 5.96e-01f  1
 207  3.1601353e+06 4.74e+01 1.22e+02  -1.0 5.04e+00   1.9 3.17e-01 5.86e-02f  1
 208  3.1573249e+06 5.19e-04 8.61e+01  -1.0 6.01e-02   1.4 1.00e+00 1.00e+00f  1
 209  3.1562428e+06 2.89e-04 1.98e+01  -1.0 2.31e-02   2.7 1.00e+00 1.00e+00f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 210  3.1465441e+06 1.48e-02 2.54e+02  -1.0 2.07e-01   2.3 1.00e+00 1.00e+00f  1
 211  3.1432717e+06 2.58e-03 5.83e+01  -1.0 7.00e-02   1.8 1.00e+00 1.00e+00f  1
 212  3.1379421e+06 2.59e+00 9.29e+01  -1.0 2.79e-01    -  8.69e-01 8.27e-01f  1
 213  3.1332082e+06 2.54e-03 8.01e+01  -1.0 1.01e-01   1.3 1.00e+00 1.00e+00f  1
 214  3.1319750e+06 2.04e-04 1.15e+01  -1.0 2.64e-02   2.6 1.00e+00 1.00e+00f  1
 215  3.1261896e+06 4.91e-03 6.63e+01  -1.0 1.24e-01   2.2 1.00e+00 1.00e+00f  1
 216  3.1247765e+06 3.27e-04 1.17e+01  -1.0 3.02e-02   2.6 1.00e+00 1.00e+00f  1
 217  3.1169796e+06 9.29e-03 9.96e+01  -1.0 1.67e-01   2.1 1.00e+00 1.00e+00f  1
 218  3.1144795e+06 1.20e-03 7.75e+01  -1.0 5.35e-02   1.6 1.00e+00 1.00e+00f  1
 219  3.1029708e+06 2.06e-02 1.62e+02  -1.0 2.46e-01   2.1 1.00e+00 1.00e+00f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 220  3.0925508e+06 2.16e-02 1.86e+01  -1.0 2.23e-01   1.6 1.00e+00 1.00e+00f  1
 221  3.0828910e+06 2.06e+01 2.63e+01  -1.0 7.37e+00    -  1.03e-01 8.87e-02f  1
 222  3.0820975e+06 7.34e-04 2.63e+01  -1.0 3.24e-02   2.9 1.00e+00 1.00e+00f  1
 223  3.0797794e+06 5.58e-04 2.49e+01  -1.0 4.96e-02   2.4 1.00e+00 1.00e+00f  1
 224  3.0598088e+06 6.43e-02 2.74e+02  -1.0 4.84e-01   2.0 1.00e+00 8.82e-01f  1
 225  3.0429585e+06 5.90e-02 1.09e+01  -1.0 3.60e-01   1.5 1.00e+00 1.00e+00f  1
 226  3.0221295e+06 1.11e-01 2.90e+02  -1.0 9.18e-01   1.9 1.00e+00 4.85e-01f  1
 227  3.0175675e+06 4.26e-03 7.35e+01  -1.0 9.76e-02   1.4 1.00e+00 1.00e+00f  1
 228  3.0165884e+06 2.64e-04 1.75e+01  -1.0 2.09e-02   2.8 1.00e+00 1.00e+00f  1
 229  3.0097621e+06 1.33e-01 9.93e+01  -1.0 1.46e-01    -  9.44e-01 1.00e+00f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 230  3.0061775e+06 2.45e-03 3.76e+01  -1.0 7.67e-02   2.3 1.00e+00 1.00e+00f  1
 231  2.9997382e+06 2.36e+00 1.00e+02  -1.0 2.22e-01    -  9.15e-01 1.00e+00f  1
 232  2.9986941e+06 2.02e-04 1.13e+01  -1.0 2.23e-02   2.7 1.00e+00 1.00e+00f  1
 233  2.9953676e+06 4.40e-02 1.00e+02  -1.0 1.02e-01    -  9.97e-01 1.00e+00f  1
 234  2.9909580e+06 3.40e-03 4.82e+01  -1.0 9.43e-02   2.2 1.00e+00 1.00e+00f  1
 235  2.9822962e+06 1.44e-02 1.05e+01  -1.0 1.85e-01   1.8 1.00e+00 1.00e+00f  1
 236  2.9769433e+06 5.46e-03 6.07e+01  -1.0 1.14e-01   2.2 1.00e+00 1.00e+00f  1
 237  2.9733482e+06 3.01e-03 6.32e+01  -1.0 7.69e-02   1.7 1.00e+00 1.00e+00f  1
 238  2.9704052e+06 2.67e-03 8.96e+01  -1.0 6.29e-02   1.2 1.00e+00 1.00e+00f  1
 239  2.9687982e+06 4.96e-04 1.42e+01  -1.0 3.44e-02   2.6 1.00e+00 1.00e+00f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 240  2.9602367e+06 1.36e-02 1.03e+02  -1.0 1.83e-01   2.1 1.00e+00 1.00e+00f  1
 241  2.9501008e+06 2.31e-02 1.84e+01  -1.0 2.17e-01   1.6 1.00e+00 1.00e+00f  1
 242  2.9470946e+06 3.99e-03 9.13e+01  -1.0 6.43e-02   1.1 1.00e+00 1.00e+00f  1
 243  2.8962827e+06 6.29e-01 5.41e+01  -1.0 1.09e+00   0.6 1.00e+00 1.00e+00f  1
 244  2.8902157e+06 6.90e+00 1.00e+02  -1.0 3.85e-01    -  1.00e+00 1.00e+00f  1
 245  2.8847101e+06 7.34e-03 8.68e+01  -1.0 1.18e-01   1.1 1.00e+00 1.00e+00f  1
 246  2.8786476e+06 9.98e-01 1.00e+02  -1.0 1.48e-01    -  1.00e+00 1.00e+00f  1
 247  2.8617597e+06 5.55e-02 1.13e+01  -1.0 3.61e-01   1.5 1.00e+00 1.00e+00f  1
 248  2.8609261e+06 2.32e-04 1.24e+01  -1.0 1.78e-02   2.8 1.00e+00 1.00e+00f  1
 249  2.8578639e+06 1.91e-03 3.59e+01  -1.0 6.55e-02   2.3 1.00e+00 1.00e+00f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 250  2.8263092e+06 2.05e-01 4.24e+02  -1.0 1.16e+00   1.9 1.00e+00 5.83e-01f  1
 251  2.8227942e+06 4.13e-03 4.31e+01  -1.0 7.52e-02   2.3 1.00e+00 1.00e+00f  1
 252  2.8218154e+06 2.61e-04 1.10e+01  -1.0 2.09e-02   2.7 1.00e+00 1.00e+00f  1
 253  2.8193471e+06 1.57e-03 1.17e+01  -1.0 5.28e-02   2.2 1.00e+00 1.00e+00f  1
 254  2.8160000e+06 3.51e-03 5.94e+01  -1.0 7.16e-02   1.8 1.00e+00 1.00e+00f  1
 255  2.8099364e+06 4.02e+00 1.00e+02  -1.0 2.95e-01    -  1.00e+00 1.00e+00f  1
 256  2.8048911e+06 5.30e-03 5.66e+01  -1.0 1.08e-01   2.2 1.00e+00 1.00e+00f  1
 257  2.8015475e+06 5.07e+00 1.01e+02  -1.0 3.27e-01    -  1.00e+00 1.00e+00f  1
 258  2.8002182e+06 3.42e-04 1.19e+01  -1.0 2.84e-02   2.6 1.00e+00 1.00e+00f  1
 259  2.7935898e+06 9.13e-03 8.32e+01  -1.0 1.42e-01   2.1 1.00e+00 1.00e+00f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 260  2.7916595e+06 8.40e-04 4.28e+01  -1.0 4.13e-02   2.6 1.00e+00 1.00e+00f  1
 261  2.7892761e+06 1.24e-03 4.10e+01  -1.0 5.10e-02   2.1 1.00e+00 1.00e+00f  1
 262  2.7850628e+06 3.95e-03 6.50e+01  -1.0 9.01e-02   1.6 1.00e+00 1.00e+00f  1
 263  2.7799600e+06 6.20e-03 8.57e+01  -1.0 1.09e-01   1.1 1.00e+00 1.00e+00f  1
 264  2.6961651e+06 1.70e+00 9.63e+00  -1.0 3.91e+01   0.7 6.75e-02 4.58e-02f  1
 265  2.6953495e+06 3.82e+00 3.10e+01  -1.0 9.19e-01    -  2.41e-01 2.43e-01f  1
 266  2.6812675e+06 4.43e-01 1.86e+02  -1.0 3.35e-01   2.0 1.00e+00 9.00e-01f  1
 267  2.6767950e+06 9.94e-03 6.82e+01  -1.0 9.56e-02   1.5 1.00e+00 1.00e+00f  1
 268  2.6592175e+06 8.30e-02 2.13e+02  -1.0 4.40e-01   1.9 1.00e+00 8.54e-01f  1
 269  2.6550444e+06 1.56e+01 1.60e+01  -1.0 9.13e-01    -  4.76e-01 6.20e-01f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 270  2.6370208e+06 8.02e-02 1.11e+01  -1.0 3.85e-01   1.5 1.00e+00 1.00e+00f  1
 271  2.5573810e+06 1.91e+00 6.10e+01  -1.0 1.70e+00   1.0 9.94e-01 1.00e+00f  1
 272  2.5513610e+06 1.34e+00 9.93e+01  -1.0 2.35e-01    -  9.32e-01 1.00e+00f  1
 273  2.5467187e+06 8.46e-03 7.46e+01  -1.0 9.93e-02   1.4 1.00e+00 1.00e+00f  1
 274  2.4695088e+06 1.98e+00 4.34e+01  -1.0 2.16e+00   0.9 1.00e+00 7.65e-01f  1
 275  2.4661916e+06 1.02e-02 3.53e+01  -1.0 7.09e-02   2.3 1.00e+00 1.00e+00f  1
 276  2.4628667e+06 1.21e+00 1.00e+02  -1.0 1.61e-01    -  8.80e-01 1.00e+00f  1
 277  2.4595328e+06 5.99e-03 5.61e+01  -1.0 7.13e-02   1.8 1.00e+00 1.00e+00f  1
 278  2.4526783e+06 1.32e+00 9.98e+01  -1.0 1.66e-01    -  9.89e-01 1.00e+00f  1
 279  2.4476601e+06 7.98e-03 6.53e+01  -1.0 1.07e-01   2.2 1.00e+00 1.00e+00f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 280  2.4411893e+06 5.60e+00 1.01e+02  -1.0 3.27e-01    -  1.00e+00 1.00e+00f  1
 281  2.4388159e+06 1.55e-03 7.41e+01  -1.0 5.08e-02   1.7 1.00e+00 1.00e+00f  1
 282  2.4327575e+06 1.03e-01 9.99e+01  -1.0 1.30e-01    -  1.00e+00 1.00e+00f  1
 283  2.4273863e+06 9.17e-03 8.02e+01  -1.0 1.15e-01   1.3 1.00e+00 1.00e+00f  1
 284  2.3541426e+06 1.84e+00 9.43e+00  -1.0 1.57e+00   0.8 1.00e+00 1.00e+00f  1
 285  2.3470947e+06 2.66e-02 9.01e+01  -1.0 1.51e-01   2.1 1.00e+00 1.00e+00f  1
 286  2.3455250e+06 1.18e-03 1.29e+01  -1.0 3.36e-02   2.5 1.00e+00 1.00e+00f  1
 287  2.3386698e+06 2.78e+00 9.99e+01  -1.0 2.37e-01    -  1.00e+00 1.00e+00f  1
 288  2.3276836e+06 4.09e-02 1.54e+02  -1.0 2.35e-01   2.1 1.00e+00 1.00e+00f  1
 289  2.2997799e+06 4.35e+01 8.72e+01  -1.0 3.28e+00    -  1.68e-01 2.62e-01f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 290  2.2953622e+06 1.83e-01 6.75e+01  -1.0 9.49e-02   1.6 6.36e-01 9.96e-01f  1
 291  2.2887887e+06 1.52e+00 1.02e+02  -1.0 2.12e-01    -  1.00e+00 1.00e+00f  1
 292  2.2825510e+06 2.98e+00 1.00e+02  -1.0 2.92e-01    -  1.00e+00 9.68e-01f  1
 293  2.2662740e+06 9.44e-02 2.33e+02  -1.0 3.48e-01   2.0 1.00e+00 1.00e+00f  1
 294  2.2594020e+06 3.04e+00 1.00e+02  -1.0 2.39e-01    -  1.00e+00 1.00e+00f  1
 295  2.2570895e+06 1.51e-03 2.48e+01  -1.0 4.95e-02   2.4 1.00e+00 1.00e+00f  1
 296  2.2356914e+06 1.60e-01 2.91e+02  -1.0 4.58e-01   2.0 1.00e+00 1.00e+00f  1
 297  2.2331982e+06 2.52e-03 2.34e+01  -1.0 5.33e-02   2.4 1.00e+00 1.00e+00f  1
 298  2.1395088e+06 2.60e+01 9.07e+01  -1.0 2.00e+00    -  1.00e+00 1.00e+00f  1
 299  2.1255086e+06 1.33e+01 1.34e+02  -1.0 6.11e-01   1.9 1.00e+00 4.90e-01f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 300  2.1225897e+06 1.52e-04 2.91e+01  -1.0 6.24e-02   2.3 1.00e+00 1.00e+00f  1
 301  2.0660301e+06 1.15e+00 7.38e+02  -1.0 1.21e+00   1.9 1.00e+00 1.00e+00f  1
 302  2.0601217e+06 3.50e-02 9.18e+01  -1.0 1.26e-01    -  1.00e+00 1.00e+00f  1
 303  2.0567052e+06 5.66e-03 3.92e+01  -1.0 7.31e-02   2.3 1.00e+00 1.00e+00f  1
 304  2.0525104e+06 1.32e-01 9.77e+01  -1.0 8.97e-02    -  1.00e+00 1.00e+00f  1
 305  2.0380107e+06 9.96e-02 9.30e+01  -1.0 3.10e-01   1.8 1.00e+00 1.00e+00f  1
 306  2.0258530e+06 1.30e+00 9.46e+01  -1.0 2.60e-01    -  1.00e+00 1.00e+00f  1
 307  1.9830582e+06 2.42e+00 8.67e+01  -1.0 1.15e+01    -  1.52e-01 7.94e-02f  1
 308  1.9710144e+06 2.98e+00 8.75e+01  -1.0 2.81e-01    -  1.00e+00 1.00e+00f  1
 309  1.9508081e+06 2.86e+00 7.69e+01  -1.0 3.68e+00    -  1.75e-01 1.17e-01f  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 310  1.9449464e+06 2.89e+00 6.61e+01  -1.0 5.98e-01    -  3.64e-01 2.19e-01f  1
 311  1.9702305e+06 3.86e-01 3.72e+02  -1.0 5.41e-01    -  3.53e-01 1.00e+00h  1
 312  1.9702018e+06 2.47e-02 5.85e+01  -1.0 6.01e-03   4.0 1.00e+00 9.36e-01h  1
 313  1.9701138e+06 4.91e-06 1.11e+01  -1.0 3.09e-03   3.6 1.00e+00 1.00e+00f  1
 314  1.9526526e+06 1.66e-01 1.31e+02  -1.0 8.00e-01    -  3.75e-01 4.67e-01f  1
 315  1.9574932e+06 2.83e-01 5.21e+01  -1.0 1.44e-01    -  1.00e+00 1.00e+00h  1
 316  1.9580433e+06 2.24e-01 2.60e+02  -1.0 1.05e-01    -  1.00e+00 5.55e-01h  1
 317  1.9622863e+06 1.90e-03 7.84e+01  -1.0 9.07e-02    -  1.00e+00 1.00e+00h  1
 318  1.9627028e+06 1.71e-02 1.52e+01  -1.0 2.46e-02    -  1.00e+00 1.00e+00h  1
 319  1.9629590e+06 2.15e-03 5.18e+00  -1.0 8.13e-03    -  1.00e+00 1.00e+00h  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 320  1.9630419e+06 1.06e-04 1.54e+00  -1.0 1.77e-03    -  1.00e+00 1.00e+00h  1
 321  1.9620927e+06 7.01e-04 1.62e+01  -1.7 2.03e-02    -  1.00e+00 1.00e+00f  1
 322  1.9620706e+06 7.27e-04 4.30e-01  -1.7 5.35e-03    -  1.00e+00 1.00e+00f  1
 323  1.9618588e+06 5.54e-05 3.48e+00  -2.5 4.53e-03    -  1.00e+00 1.00e+00f  1
 324  1.9618626e+06 3.39e-05 6.22e-02  -2.5 1.19e-03    -  1.00e+00 1.00e+00h  1
 325  1.9618303e+06 5.83e-07 5.41e-01  -3.8 6.92e-04    -  1.00e+00 1.00e+00f  1
 326  1.9618303e+06 8.46e-07 9.62e-03  -3.8 1.86e-04    -  1.00e+00 1.00e+00h  1
 327  1.9618303e+06 2.56e-10 1.69e-04  -3.8 3.19e-06    -  1.00e+00 1.00e+00h  1
 328  1.9618285e+06 1.05e-08 3.03e-02  -5.7 3.86e-05    -  1.00e+00 1.00e+00f  1
 329  1.9618285e+06 2.69e-09 5.43e-04  -5.7 1.04e-05    -  1.00e+00 1.00e+00h  1
iter    objective    inf_pr   inf_du lg(mu)  ||d||  lg(rg) alpha_du alpha_pr  ls
 330  1.9618285e+06 3.64e-12 1.81e-05  -5.7 3.40e-07    -  1.00e+00 1.00e+00h  1
 331  1.9618284e+06 1.29e-10 3.73e-04  -7.7 4.75e-07    -  1.00e+00 1.00e+00f  1
 332  1.9618284e+06 7.15e-13 6.54e-06  -7.7 1.26e-07    -  1.00e+00 1.00e+00h  1

Number of Iterations....: 332

                                   (scaled)                 (unscaled)
Objective...............:   4.1955211810440223e+03    1.9618284403789998e+06
Dual infeasibility......:   6.5404541241820269e-06    3.0583206138459938e-03
Constraint violation....:   7.1474591967443444e-13    7.1474591967443444e-13
Complementarity.........:   1.9441612600804802e-08    9.0909107310473607e-06
Overall NLP error.......:   2.0904457950323695e-06    3.0583206138459938e-03


Number of objective function evaluations             = 333
Number of objective gradient evaluations             = 333
Number of equality constraint evaluations            = 333
Number of inequality constraint evaluations          = 333
Number of equality constraint Jacobian evaluations   = 333
Number of inequality constraint Jacobian evaluations = 333
Number of Lagrangian Hessian evaluations             = 332
Total CPU secs in IPOPT (w/o function evaluations)   =      4.293
Total CPU secs in NLP function evaluations           =     16.677

EXIT: Optimal Solution Found.

[svigerske]

There are plenty of Ipopt options one could play with: https://coin-or.github.io/Ipopt/OPTIONS.html
You may want to avoid the ones marked as "advanced". mu_strategy, nlp_scaling_method, and other options related to step computation and line search could be interesting.

Maybe it is the nonconvexity of the problem (lg(rg) not '-') that prevents Ipopt from doing fast progress. A better starting point might help.

Updating to a current Ipopt version or changing the linear solver will probably not help, but who knows.

[lrschoen23]

Thanks for the response! I have tried different options for mu_strategy and also tried turning scaling off at one point without seeing much of a positive change. Step computation settings was my thought as well, do you have any specific recommendations there with regards to discounting constraint violation in favor of objective decrease?

[svigerske]

Whether a new iterate is accepted is determined by the filter. This one decides the amount of objective improvement and infeasibility reduction that needs to be achieved. I suggest reading the Ipopt implementation paper to understand better how this works. There are parameters to this filter, which should fall into the line search category.