Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:16:00 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 3.860476e+04, 475 iterations, 0.01 seconds

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

     0     0 38604.7615    0    3          - 38604.7615     -      -    0s
     0     0 38647.7990    0    3          - 38647.7990     -      -    0s
     0     0 38659.1670    0    3          - 38659.1670     -      -    0s
     0     0 38661.9032    0    3          - 38661.9032     -      -    0s
     0     0 38662.7254    0    3          - 38662.7254     -      -    0s
     0     0 38662.8061    0    3          - 38662.8061     -      -    0s
     0     0 38663.1598    0    3          - 38663.1598     -      -    0s
     0     0 38663.7987    0    3          - 38663.7987     -      -    0s
     0     0 38664.7165    0    3          - 38664.7165     -      -    0s
     0     0 38664.9310    0    3          - 38664.9310     -      -    0s
     0     0 38664.9310    0    3          - 38664.9310     -      -    0s
H    0     0                    39165.291803 38664.9310  1.28%     -    0s
     0     2 38667.5510    0    3 39165.2918 38667.5510  1.27%     -    0s
*    9     5               7    38860.427834 38808.3047  0.13%  14.9    0s

Cutting planes:
  Flow cover: 17

Explored 17 nodes (743 simplex iterations) in 0.20 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.886042783404e+04, best bound 3.886042783404e+04, gap 0.0%