Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:51:55 2013

Optimize a model with 42965 rows, 42315 columns and 169065 nonzeros
Presolve removed 357 rows and 0 columns
Presolve time: 0.25s
Presolved: 42608 rows, 42315 columns, 168351 nonzeros
Variable types: 42250 continuous, 65 integer (65 binary)

Root relaxation: objective 6.203190e+04, 7447 iterations, 1.26 seconds

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

     0     0 62031.8956    0    5          - 62031.8956     -      -    1s
H    0     0                    64423.000000 62031.8956  3.71%     -    1s
     0     0 62033.9448    0    6 64423.0000 62033.9448  3.71%     -    2s
     0     0 62035.9130    0    5 64423.0000 62035.9130  3.71%     -    2s
     0     0 62036.3673    0    6 64423.0000 62036.3673  3.70%     -    2s
     0     0 62037.1504    0    6 64423.0000 62037.1504  3.70%     -    3s
H    0     0                    62176.000000 62037.1504  0.22%     -    3s
     0     0 62037.1504    0    5 62176.0000 62037.1504  0.22%     -    4s
     0     0 62037.3383    0    5 62176.0000 62037.3383  0.22%     -    5s
     0     0 62038.0821    0    5 62176.0000 62038.0821  0.22%     -    5s
     0     0 62102.0728    0    5 62176.0000 62102.0728  0.12%     -    5s
     0     0 62104.0245    0    4 62176.0000 62104.0245  0.12%     -    5s
     0     2 62112.2208    0    4 62176.0000 62112.2208  0.10%     -    6s

Cutting planes:
  Gomory: 1
  Flow cover: 2

Explored 7 nodes (11010 simplex iterations) in 6.16 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.217600000000e+04, best bound 6.217600000000e+04, gap 0.0%