Gurobi 5.0.1 (linux64) logging started Fri Jan 18 06:07:21 2013

Optimize a model with 1600 rows, 50600 columns and 326550 nonzeros
Presolve removed 50 rows and 50 columns
Presolve time: 0.55s
Presolved: 1550 rows, 50550 columns, 301500 nonzeros
Variable types: 50100 continuous, 450 integer (450 binary)

Root relaxation: objective 1.650739e+05, 2620 iterations, 0.16 seconds

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

     0     0 165073.856    0    6          - 165073.856     -      -    0s
     0     0 165076.483    0    6          - 165076.483     -      -    1s
     0     0 165079.019    0   11          - 165079.019     -      -    1s
     0     0 165079.333    0   11          - 165079.333     -      -    1s
     0     0 165079.390    0   11          - 165079.390     -      -    1s
     0     0 165079.390    0   11          - 165079.390     -      -    2s
     0     0 165079.390    0   11          - 165079.390     -      -    2s
     0     0 165079.390    0   11          - 165079.390     -      -    2s
     0     0 165079.390    0   11          - 165079.390     -      -    3s
     0     0 165079.390    0   11          - 165079.390     -      -    3s
     0     0 165079.390    0   11          - 165079.390     -      -    3s
     0     2 165079.741    0   11          - 165079.741     -      -    7s
*   28    11              28    165633.17857 165106.310  0.32%  15.2    9s
*   54    19              26    165626.38404 165392.278  0.14%  12.9    9s
    72    12 165607.513    4    3 165626.384 165577.071  0.03%  12.2   10s

Cutting planes:
  Flow cover: 7

Explored 76 nodes (4388 simplex iterations) in 10.09 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.656263840374e+05, best bound 1.656142266358e+05, gap 0.0073%