Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:08:49 2013

Optimize a model with 68 rows, 2066 columns and 24148 nonzeros
Presolve removed 22 rows and 24 columns
Presolve time: 0.08s
Presolved: 46 rows, 2042 columns, 22102 nonzeros
Variable types: 2022 continuous, 20 integer (20 binary)

Root relaxation: objective 5.784077e+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 5784.07688    0    3          - 5784.07688     -      -    0s
     0     0 5785.72899    0    3          - 5785.72899     -      -    0s
     0     0 5804.09749    0    6          - 5804.09749     -      -    0s
     0     0 5808.14715    0    3          - 5808.14715     -      -    0s
     0     0 5808.14715    0    3          - 5808.14715     -      -    0s
     0     0 5808.14715    0    3          - 5808.14715     -      -    0s
     0     0 5808.16276    0    3          - 5808.16276     -      -    0s
     0     0 5811.02829    0    3          - 5811.02829     -      -    0s
     0     0 5812.13537    0    3          - 5812.13537     -      -    0s
     0     0 5812.13537    0    3          - 5812.13537     -      -    0s
H    0     0                    5812.3255371 5812.13537  0.00%     -    0s

Cutting planes:
  Flow cover: 1

Explored 0 nodes (90 simplex iterations) in 0.68 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.812325537147e+03, best bound 5.812135371027e+03, gap 0.0033%