Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:42:00 2013

Optimize a model with 520 rows, 5180 columns and 16440 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.02s
Presolved: 500 rows, 5160 columns, 15420 nonzeros
Variable types: 5040 continuous, 120 integer (120 binary)

Root relaxation: objective 3.709539e+04, 456 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 37098.2336    0    9          - 37098.2336     -      -    0s
     0     0 37098.2336    0    9          - 37098.2336     -      -    0s
     0     0 37098.9803    0    9          - 37098.9803     -      -    0s
     0     0 37099.0059    0   10          - 37099.0059     -      -    0s
     0     0 37099.0805    0    9          - 37099.0805     -      -    0s
     0     0 37099.2792    0   11          - 37099.2792     -      -    0s
     0     0 37099.2792    0   11          - 37099.2792     -      -    0s
     0     0 37099.2792    0   11          - 37099.2792     -      -    0s
     0     0 37099.2792    0   11          - 37099.2792     -      -    0s
     0     0 37099.2792    0   11          - 37099.2792     -      -    0s
H    0     0                    37324.411292 37099.2792  0.60%     -    0s
     0     1 37237.2173    0    6 37324.4113 37237.2173  0.23%     -    0s
*   12     8              12    37256.621243 37247.8371  0.02%  18.1    0s
*   21     9               8    37254.115825 37251.5375  0.01%  11.5    0s

Cutting planes:
  Flow cover: 11

Explored 22 nodes (1445 simplex iterations) in 0.28 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.725411582528e+04, best bound 3.725153746612e+04, gap 0.0069%