Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:50:39 2013

Optimize a model with 560 rows, 6200 columns and 26500 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.04s
Presolved: 540 rows, 6180 columns, 24480 nonzeros
Variable types: 6040 continuous, 140 integer (140 binary)

Root relaxation: objective 3.709539e+04, 477 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 37096.9613    0    9          - 37096.9613     -      -    0s
     0     0 37097.0690    0    9          - 37097.0690     -      -    0s
     0     0 37097.4175    0    9          - 37097.4175     -      -    0s
     0     0 37097.4175    0   11          - 37097.4175     -      -    0s
     0     0 37097.4175    0    9          - 37097.4175     -      -    0s
     0     0 37097.4175    0    9          - 37097.4175     -      -    0s
     0     0 37097.4216    0   11          - 37097.4216     -      -    0s
     0     0 37097.4216    0   11          - 37097.4216     -      -    0s
H    0     0                    37380.579044 37097.4216  0.76%     -    0s
     0     2 37197.1547    0    3 37380.5790 37197.1547  0.49%     -    0s
*   14     9              14    37256.632658 37244.5375  0.03%   7.3    0s
*   23    10              10    37254.129751 37251.5375  0.01%   5.7    0s

Cutting planes:
  Flow cover: 9

Explored 24 nodes (831 simplex iterations) in 0.44 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.725412975123e+04, best bound 3.725153746612e+04, gap 0.0070%