Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:02:49 2013

Optimize a model with 60 rows, 462 columns and 4136 nonzeros
Presolve removed 22 rows and 27 columns
Presolve time: 0.01s
Presolved: 38 rows, 435 columns, 3684 nonzeros
Variable types: 419 continuous, 16 integer (16 binary)

Root relaxation: objective 5.281733e+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 5281.73269    0    3          - 5281.73269     -      -    0s
     0     0 5283.65657    0    3          - 5283.65657     -      -    0s
     0     0 5295.65836    0    3          - 5295.65836     -      -    0s
     0     0 5296.00729    0    3          - 5296.00729     -      -    0s
     0     0 5296.00729    0    3          - 5296.00729     -      -    0s
H    0     0                    5296.3125573 5296.00729  0.01%     -    0s

Cutting planes:
  Flow cover: 1

Explored 0 nodes (52 simplex iterations) in 0.03 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.296312557325e+03, best bound 5.296007287006e+03, gap 0.0058%