Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:41:42 2013

Optimize a model with 520 rows, 6720 columns and 26260 nonzeros
Presolve removed 20 rows and 580 columns
Presolve time: 0.03s
Presolved: 500 rows, 6140 columns, 24260 nonzeros
Variable types: 6020 continuous, 120 integer (120 binary)

Root relaxation: objective 3.709539e+04, 442 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 37098.1054    0    9          - 37098.1054     -      -    0s
     0     0 37098.3419    0    9          - 37098.3419     -      -    0s
     0     0 37098.8992    0    9          - 37098.8992     -      -    0s
     0     0 37099.0951    0    9          - 37099.0951     -      -    0s
     0     0 37099.0951    0    9          - 37099.0951     -      -    0s
     0     0 37099.0951    0    9          - 37099.0951     -      -    0s
     0     0 37099.0951    0    9          - 37099.0951     -      -    0s
     0     0 37099.0951    0    9          - 37099.0951     -      -    0s
H    0     0                    37335.944962 37099.0951  0.63%     -    0s
     0     2 37107.8251    0    3 37335.9450 37107.8251  0.61%     -    0s
*    9     7               9    37254.115825 37244.5599  0.03%  18.7    0s
*   24     4               9    37253.444027 37248.6947  0.01%   8.2    0s

Cutting planes:
  Flow cover: 10

Explored 31 nodes (1023 simplex iterations) in 0.37 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.725344402687e+04, best bound 3.725022278848e+04, gap 0.0086%