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

Optimize a model with 440 rows, 4340 columns and 9520 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.01s
Presolved: 420 rows, 4320 columns, 9300 nonzeros
Variable types: 4240 continuous, 80 integer (80 binary)

Root relaxation: objective 3.709539e+04, 429 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   12          - 37095.3933     -      -    0s
     0     0 37107.3719    0    9          - 37107.3719     -      -    0s
     0     0 37107.3719    0    9          - 37107.3719     -      -    0s
     0     0 37111.0409    0    9          - 37111.0409     -      -    0s
     0     0 37111.2852    0    9          - 37111.2852     -      -    0s
     0     0 37111.3322    0    9          - 37111.3322     -      -    0s
     0     0 37111.3322    0   10          - 37111.3322     -      -    0s
     0     0 37111.3322    0   10          - 37111.3322     -      -    0s
H    0     0                    37258.678632 37111.3322  0.40%     -    0s
     0     2 37231.3385    0    4 37258.6786 37231.3385  0.07%     -    0s
*    3     2               3    37255.478772 37244.1312  0.03%  46.0    0s
*    9     1               4    37252.636188 37251.3253  0.00%  16.8    0s

Cutting planes:
  Flow cover: 13

Explored 10 nodes (1001 simplex iterations) in 0.14 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.725263618801e+04, best bound 3.725132529293e+04, gap 0.0035%