Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:16:01 2013

Optimize a model with 480 rows, 4640 columns and 9620 nonzeros
Presolve removed 40 rows and 60 columns
Presolve time: 0.02s
Presolved: 440 rows, 4580 columns, 9160 nonzeros
Variable types: 4400 continuous, 180 integer (180 binary)

Root relaxation: objective 3.894400e+04, 527 iterations, 0.01 seconds

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

     0     0 38944.0027    0    2          - 38944.0027     -      -    0s
     0     0 38988.2141    0    2          - 38988.2141     -      -    0s
     0     0 38988.2141    0    2          - 38988.2141     -      -    0s
     0     0 38991.3132    0    2          - 38991.3132     -      -    0s
     0     0 38994.4263    0    2          - 38994.4263     -      -    0s
     0     0 38994.4263    0    2          - 38994.4263     -      -    0s
H    0     0                    42980.104390 38994.4263  9.27%     -    0s
     0     2 39009.3459    0    2 42980.1044 39009.3459  9.24%     -    0s
*   10     7               8    39251.995816 39212.8980  0.10%   9.2    0s
*   17     0               7    39246.376355 39246.3764   0.0%  10.0    0s

Cutting planes:
  Flow cover: 8

Explored 18 nodes (742 simplex iterations) in 0.20 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.924637635461e+04, best bound 3.924637635461e+04, gap 0.0%