Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:02:44 2013

Optimize a model with 60 rows, 1084 columns and 8914 nonzeros
Presolve removed 22 rows and 254 columns
Presolve time: 0.03s
Presolved: 38 rows, 830 columns, 8058 nonzeros
Variable types: 814 continuous, 16 integer (16 binary)

Root relaxation: objective 5.497312e+03, 16 iterations, 0.00 seconds

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

     0     0 5497.31217    0    5          - 5497.31217     -      -    0s
     0     0 5498.18907    0    5          - 5498.18907     -      -    0s
     0     0 5498.20257    0    5          - 5498.20257     -      -    0s
     0     0 5503.91829    0    2          - 5503.91829     -      -    0s
     0     0 5503.91829    0    2          - 5503.91829     -      -    0s
H    0     0                    5503.9228337 5503.91829  0.00%     -    0s

Cutting planes:
  Flow cover: 2

Explored 0 nodes (54 simplex iterations) in 0.07 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.503922833748e+03, best bound 5.503918291560e+03, gap 0.0001%