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 3.709539e+04, 399 iterations, 0.01 seconds

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

     0     0 37095.3933    0    4          - 37095.3933     -      -    0s
     0     0 37107.2437    0    3          - 37107.2437     -      -    0s
     0     0 37107.4021    0    3          - 37107.4021     -      -    0s
     0     0 37111.4618    0    3          - 37111.4618     -      -    0s
     0     0 37111.8154    0    3          - 37111.8154     -      -    0s
     0     0 37111.9099    0    2          - 37111.9099     -      -    0s
     0     0 37111.9099    0    2          - 37111.9099     -      -    0s
H    0     0                    37258.678632 37111.9099  0.39%     -    0s
     0     2 37121.1317    0    2 37258.6786 37121.1317  0.37%     -    0s
*    7     4               5    37255.478772 37140.3647  0.31%  13.6    0s
*    9     3               5    37252.636188 37140.3647  0.30%  11.3    0s

Cutting planes:
  Flow cover: 10

Explored 15 nodes (658 simplex iterations) in 0.13 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.725263618801e+04, best bound 3.725263618801e+04, gap 0.0%