Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:17:16 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 3.894400e+04, 622 iterations, 0.02 seconds

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

     0     0 38944.0027    0   10          - 38944.0027     -      -    0s
     0     0 38947.1436    0   10          - 38947.1436     -      -    0s
     0     0 38947.3437    0   10          - 38947.3437     -      -    0s
     0     0 38947.4985    0   10          - 38947.4985     -      -    0s
     0     0 38947.4985    0   10          - 38947.4985     -      -    0s
     0     2 38948.9576    0   10          - 38948.9576     -      -    1s
*   72    54              69    39375.847489 39040.5776  0.85%   6.1    2s
*  108    19              20    39247.714512 39055.3219  0.49%   7.4    2s

Cutting planes:
  Flow cover: 6

Explored 152 nodes (2151 simplex iterations) in 2.31 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.924771451215e+04, best bound 3.924461262181e+04, gap 0.0079%