Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:48:11 2013

Optimize a model with 41664 rows, 41024 columns and 163904 nonzeros
Presolve removed 3450 rows and 0 columns
Presolve time: 0.25s
Presolved: 38214 rows, 41024 columns, 157004 nonzeros
Variable types: 40960 continuous, 64 integer (64 binary)

Root relaxation: objective 6.754357e+04, 6597 iterations, 0.99 seconds

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

     0     0 67543.5745    0    1          - 67543.5745     -      -    1s
H    0     0                    67733.000000 67543.5745  0.28%     -    1s
H    0     0                    67565.000000 67543.5745  0.03%     -    1s
     0     0 67545.7183    0    2 67565.0000 67545.7183  0.03%     -    1s
     0     0 67545.7183    0    1 67565.0000 67545.7183  0.03%     -    2s
     0     0 67545.7183    0    2 67565.0000 67545.7183  0.03%     -    2s

Cutting planes:
  Gomory: 1
  Flow cover: 2

Explored 0 nodes (8315 simplex iterations) in 2.53 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.756500000000e+04, best bound 6.756500000000e+04, gap 0.0%