Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:48:04 2013

Optimize a model with 66501 rows, 65691 columns and 262521 nonzeros
Presolve removed 5785 rows and 0 columns
Presolve time: 0.42s
Presolved: 60716 rows, 65691 columns, 250951 nonzeros
Variable types: 65610 continuous, 81 integer (81 binary)

Root relaxation: objective 7.463779e+04, 10272 iterations, 2.14 seconds

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

     0     0 74637.7938    0    2          - 74637.7938     -      -    2s
H    0     0                    75286.000000 74637.7938  0.86%     -    2s
H    0     0                    75089.000000 74637.7938  0.60%     -    2s
H    0     0                    74974.000000 74637.7938  0.45%     -    3s
     0     0 74641.2068    0    3 74974.0000 74641.2068  0.44%     -    3s
     0     0 74641.2335    0    3 74974.0000 74641.2335  0.44%     -    3s
     0     0 74641.2335    0    2 74974.0000 74641.2335  0.44%     -    7s
     0     0 74641.2335    0    3 74974.0000 74641.2335  0.44%     -    8s
     0     0 74641.2335    0    3 74974.0000 74641.2335  0.44%     -    8s
     0     2 74662.9242    0    3 74974.0000 74662.9242  0.41%     -    9s
*    3     2               3    74800.000000 74800.0000   0.0%   128    9s

Cutting planes:
  Gomory: 1
  Flow cover: 5

Explored 4 nodes (15891 simplex iterations) in 9.87 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.480000000000e+04, best bound 7.480000000000e+04, gap 0.0%