Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:16:59 2013

Optimize a model with 600 rows, 14440 columns and 96340 nonzeros
Presolve removed 20 rows and 2260 columns
Presolve time: 0.19s
Presolved: 580 rows, 12180 columns, 88340 nonzeros
Variable types: 12020 continuous, 160 integer (160 binary)

Root relaxation: objective 4.370285e+04, 649 iterations, 0.02 seconds

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

     0     0 43702.8549    0   10          - 43702.8549     -      -    0s
     0     0 43704.3626    0   10          - 43704.3626     -      -    0s
     0     0 43704.4228    0   10          - 43704.4228     -      -    0s
     0     0 43704.4504    0   10          - 43704.4504     -      -    0s
     0     0 43704.4890    0   10          - 43704.4890     -      -    0s
     0     0 43704.4890    0   10          - 43704.4890     -      -    0s
     0     0 43704.4890    0   10          - 43704.4890     -      -    0s
H    0     0                    47780.040699 43704.4890  8.53%     -    1s
     0     2 43709.0127    0   10 47780.0407 43709.0127  8.52%     -    1s
*   21    15              19    44104.416666 43839.0806  0.60%  17.9    1s
H   27    16                    44101.589115 43839.0806  0.60%  14.4    1s
*   94    18              18    43935.309363 43878.8765  0.13%   7.9    2s
*  125     7              12    43902.406436 43900.8495  0.00%   6.6    2s

Cutting planes:
  Flow cover: 8

Explored 126 nodes (1830 simplex iterations) in 2.11 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.390240643638e+04, best bound 4.390084951135e+04, gap 0.0035%