Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:08:48 2013

Optimize a model with 68 rows, 2066 columns and 24148 nonzeros
Presolve removed 22 rows and 27 columns
Presolve time: 0.08s
Presolved: 46 rows, 2039 columns, 22096 nonzeros
Variable types: 2019 continuous, 20 integer (20 binary)

Root relaxation: objective 5.281733e+03, 12 iterations, 0.00 seconds

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

     0     0 5281.73269    0    3          - 5281.73269     -      -    0s
     0     0 5282.61054    0    3          - 5282.61054     -      -    0s
     0     0 5294.03433    0    3          - 5294.03433     -      -    0s
     0     0 5294.03433    0    3          - 5294.03433     -      -    0s
     0     0 5294.03433    0    3          - 5294.03433     -      -    0s
     0     0 5294.04302    0    3          - 5294.04302     -      -    0s
     0     0 5295.50691    0    3          - 5295.50691     -      -    0s
     0     0 5296.07268    0    3          - 5296.07268     -      -    0s
     0     0 5296.07268    0    3          - 5296.07268     -      -    0s
H    0     0                    5296.3130139 5296.07268  0.00%     -    0s

Cutting planes:
  Flow cover: 1

Explored 0 nodes (86 simplex iterations) in 0.68 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.296313013899e+03, best bound 5.296072678432e+03, gap 0.0045%