Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:04:34 2013

Optimize a model with 300 rows, 6220 columns and 46170 nonzeros
Presolve removed 10 rows and 1130 columns
Presolve time: 0.07s
Presolved: 290 rows, 5090 columns, 42170 nonzeros
Variable types: 5010 continuous, 80 integer (80 binary)

Root relaxation: objective 1.836170e+04, 152 iterations, 0.00 seconds

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

     0     0 18361.7044    0    5          - 18361.7044     -      -    0s
     0     0 18361.9712    0    5          - 18361.9712     -      -    0s
     0     0 18381.2294    0    5          - 18381.2294     -      -    0s
     0     0 18394.8256    0   19          - 18394.8256     -      -    0s
     0     0 18414.4394    0    8          - 18414.4394     -      -    0s
     0     0 18414.4394    0    8          - 18414.4394     -      -    0s
     0     0 18414.4394    0    8          - 18414.4394     -      -    0s
     0     0 18414.4611    0    8          - 18414.4611     -      -    0s
     0     0 18414.4611    0    8          - 18414.4611     -      -    0s
H    0     0                    18460.296215 18414.4611  0.25%     -    0s
     0     2 18414.4611    0    8 18460.2962 18414.4611  0.25%     -    0s
*   52    13              14    18419.606873 18416.2939  0.02%   5.5    0s
H   54    11                    18419.214919 18416.2939  0.02%   5.3    0s
*   62     8               9    18418.481642 18416.4578  0.01%   5.3    0s
*   67     6              12    18418.273523 18416.4578  0.01%   5.0    0s

Cutting planes:
  Flow cover: 1

Explored 68 nodes (1138 simplex iterations) in 0.90 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.841827352336e+04, best bound 1.841645780122e+04, gap 0.0099%