Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:59:30 2013

Optimize a model with 17261 rows, 16851 columns and 67281 nonzeros
Presolve removed 1126 rows and 0 columns
Presolve time: 0.10s
Presolved: 16135 rows, 16851 columns, 65029 nonzeros
Variable types: 16810 continuous, 41 integer (41 binary)

Root relaxation: objective 4.272891e+04, 2730 iterations, 0.21 seconds

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

     0     0 42728.9107    0    2          - 42728.9107     -      -    0s
H    0     0                    43185.000000 42728.9107  1.06%     -    0s
H    0     0                    42755.000000 42728.9107  0.06%     -    0s
     0     0 42731.4307    0    5 42755.0000 42731.4307  0.06%     -    0s
     0     0 42732.9360    0    5 42755.0000 42732.9360  0.05%     -    0s
     0     0 42732.9811    0    3 42755.0000 42732.9811  0.05%     -    0s
     0     0     cutoff    0      42755.0000 42755.0000   0.0%     -    0s

Cutting planes:
  Gomory: 1
  Flow cover: 9

Explored 0 nodes (2883 simplex iterations) in 0.70 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.275500000000e+04, best bound 4.275500000000e+04, gap 0.0%