Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:08:09 2013

Optimize a model with 68 rows, 4160 columns and 52122 nonzeros
Presolve removed 22 rows and 123 columns
Presolve time: 0.31s
Presolved: 46 rows, 4037 columns, 48072 nonzeros
Variable types: 4017 continuous, 20 integer (20 binary)

Root relaxation: objective 5.281733e+03, 22 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    8          - 5281.73269     -      -    0s
     0     0 5282.61054    0    8          - 5282.61054     -      -    0s
     0     0 5282.61054    0    8          - 5282.61054     -      -    0s
H    0     0                    5303.9829533 5282.61054  0.40%     -    0s
H    0     0                    5302.2995159 5282.61054  0.37%     -    0s
     0     0 5296.07220    0    5 5302.29952 5296.07220  0.12%     -    0s
     0     0 5296.07628    0    5 5302.29952 5296.07628  0.12%     -    0s
     0     2 5296.29356    0    5 5302.29952 5296.29356  0.11%     -    0s
H   10     8                    5296.6639357 5296.30813  0.01%   1.0    0s

Cutting planes:
  Gomory: 5
  Flow cover: 1

Explored 10 nodes (255 simplex iterations) in 0.60 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.296663935740e+03, best bound 5.296308129908e+03, gap 0.0067%