Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:02:40 2013

Optimize a model with 828 rows, 844 columns and 3282 nonzeros
Presolve removed 808 rows and 814 columns
Presolve time: 0.01s
Presolved: 20 rows, 30 columns, 84 nonzeros
Variable types: 22 continuous, 8 integer (8 binary)

Root relaxation: objective 5.497312e+03, 11 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    1          - 5497.31217     -      -    0s
H    0     0                    5503.9228337 5497.31217  0.12%     -    0s
     0     0     cutoff    0      5503.92283 5503.92283   0.0%     -    0s

Cutting planes:
  Implied bound: 1
  Flow cover: 2

Explored 0 nodes (15 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.503922833748e+03, best bound 5.503922833748e+03, gap 0.0%