Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:06:42 2013

Optimize a model with 2000 rows, 101100 columns and 203800 nonzeros
Presolve removed 100 rows and 100 columns
Presolve time: 0.35s
Presolved: 1900 rows, 101000 columns, 203200 nonzeros
Variable types: 100700 continuous, 300 integer (300 binary)

Root relaxation: objective 8.570461e+05, 5880 iterations, 0.59 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0 857046.104    0    2          - 857046.104     -      -    1s
H    0     0                    879012.06458 857046.104  2.50%     -    1s
     0     0 857083.871    0    2 879012.065 857083.871  2.49%     -    1s
     0     0 857089.499    0    2 879012.065 857089.499  2.49%     -    1s
     0     0 857106.755    0    2 879012.065 857106.755  2.49%     -    2s
     0     0 857106.755    0    2 879012.065 857106.755  2.49%     -    2s
     0     0 857107.895    0    2 879012.065 857107.895  2.49%     -    2s
     0     0 857114.651    0    2 879012.065 857114.651  2.49%     -    3s
     0     0 857114.651    0    2 879012.065 857114.651  2.49%     -    3s
     0     0 857116.662    0    2 879012.065 857116.662  2.49%     -    3s
     0     0 857119.348    0    2 879012.065 857119.348  2.49%     -    4s
     0     0 857120.569    0    2 879012.065 857120.569  2.49%     -    4s
     0     0 857122.132    0    2 879012.065 857122.132  2.49%     -    4s
     0     0 857122.685    0    2 879012.065 857122.685  2.49%     -    4s
     0     0 857123.116    0    2 879012.065 857123.116  2.49%     -    5s
     0     0 857123.572    0    2 879012.065 857123.572  2.49%     -    5s
     0     0 857123.572    0    2 879012.065 857123.572  2.49%     -    6s
     0     2 857600.307    0    2 879012.065 857600.307  2.44%     -    7s
    10    12 858847.671   10    2 879012.065 858229.911  2.36%   111   10s
H   27    19                    862271.92178 858229.911  0.47%  69.2   13s
    39    17 861382.031   39    2 862271.922 858229.911  0.47%  60.4   15s
H   54     9                    859216.39098 858326.681  0.10%  59.0   17s
*   64    11              13    859163.71493 858413.538  0.09%  55.3   18s
    75    20 858833.314   12    2 859163.715 858451.167  0.08%  52.1   20s
*  108    13               9    859145.02367 858954.942  0.02%  47.2   21s
*  120     0              12    859001.15552 859001.156   0.0%  43.6   21s

Cutting planes:
  Flow cover: 14

Explored 121 nodes (12688 simplex iterations) in 21.72 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.590011555227e+05, best bound 8.590011555227e+05, gap 0.0%