Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:26:43 2013

Optimize a model with 64 rows, 1064 columns and 11142 nonzeros
Presolve removed 22 rows and 30 columns
Presolve time: 0.03s
Presolved: 42 rows, 1034 columns, 10084 nonzeros
Variable types: 1016 continuous, 18 integer (18 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 5497.88291    0    3          - 5497.88291     -      -    0s
     0     0 5502.90263    0    3          - 5502.90263     -      -    0s
     0     0 5503.54911    0    3          - 5503.54911     -      -    0s
     0     0 5503.54911    0    3          - 5503.54911     -      -    0s
H    0     0                    5511.6017406 5503.54911  0.15%     -    0s
     0     0 5503.79893    0    2 5511.60174 5503.79893  0.14%     -    0s
     0     0 5503.80454    0    4 5511.60174 5503.80454  0.14%     -    0s
     0     0 5503.80454    0    4 5511.60174 5503.80454  0.14%     -    0s
     0     0 5503.91173    0    3 5511.60174 5503.91173  0.14%     -    0s
     0     2 5503.91288    0    3 5511.60174 5503.91288  0.14%     -    0s
*    8     4               8    5506.3091798 5503.91568  0.04%   3.6    0s
*   12     2               3    5503.9233314 5503.92192  0.00%   2.8    0s

Cutting planes:
  Flow cover: 1

Explored 13 nodes (122 simplex iterations) in 0.21 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.503923331361e+03, best bound 5.503921915908e+03, gap 0.0000%