Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:08:50 2013

Optimize a model with 68 rows, 2066 columns and 24148 nonzeros
Presolve removed 22 rows and 30 columns
Presolve time: 0.07s
Presolved: 46 rows, 2036 columns, 22090 nonzeros
Variable types: 2016 continuous, 20 integer (20 binary)

Root relaxation: objective 5.497312e+03, 14 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    3          - 5497.31217     -      -    0s
     0     0 5497.71845    0    3          - 5497.71845     -      -    0s
     0     0 5502.90162    0    3          - 5502.90162     -      -    0s
     0     0 5503.54874    0    3          - 5503.54874     -      -    0s
     0     0 5503.79905    0    3          - 5503.79905     -      -    0s
     0     0 5503.91149    0    3          - 5503.91149     -      -    0s
     0     0 5503.91149    0    3          - 5503.91149     -      -    0s
H    0     0                    5503.9234267 5503.91149  0.00%     -    0s

Cutting planes:
  Flow cover: 1

Explored 0 nodes (77 simplex iterations) in 0.20 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.503923426738e+03, best bound 5.503911494822e+03, gap 0.0002%