Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:16:09 2013

Optimize a model with 28673 rows, 28143 columns and 112413 nonzeros
Presolve removed 1905 rows and 0 columns
Presolve time: 0.16s
Presolved: 26768 rows, 28143 columns, 108603 nonzeros
Variable types: 28090 continuous, 53 integer (53 binary)

Root relaxation: objective 5.328466e+04, 3892 iterations, 0.35 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0 53284.6564    0    3          - 53284.6564     -      -    0s
H    0     0                    53778.000000 53284.6564  0.92%     -    0s
H    0     0                    53334.000000 53284.6564  0.09%     -    0s
     0     0 53286.9228    0    5 53334.0000 53286.9228  0.09%     -    0s
     0     0 53286.9228    0    3 53334.0000 53286.9228  0.09%     -    1s
     0     0 53287.4459    0    5 53334.0000 53287.4459  0.09%     -    1s
     0     0 53287.8593    0    5 53334.0000 53287.8593  0.09%     -    1s
     0     0 53296.7095    0    2 53334.0000 53296.7095  0.07%     -    1s
     0     0 53298.8000    0    1 53334.0000 53298.8000  0.07%     -    1s
     0     2 53305.0000    0    1 53334.0000 53305.0000  0.05%     -    1s

Cutting planes:
  Gomory: 2
  Flow cover: 5

Explored 3 nodes (5521 simplex iterations) in 1.69 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.333400000000e+04, best bound 5.333400000000e+04, gap 0.0%