Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:36:55 2013

Optimize a model with 37881 rows, 37271 columns and 148901 nonzeros
Presolve removed 3079 rows and 0 columns
Presolve time: 0.22s
Presolved: 34802 rows, 37271 columns, 142743 nonzeros
Variable types: 37210 continuous, 61 integer (61 binary)

Root relaxation: objective 6.628849e+04, 6457 iterations, 0.98 seconds

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

     0     0 66288.4855    0    4          - 66288.4855     -      -    1s
H    0     0                    67553.000000 66288.4855  1.87%     -    1s
H    0     0                    66332.000000 66288.4855  0.07%     -    1s
     0     0 66296.4750    0    5 66332.0000 66296.4750  0.05%     -    1s
     0     0 66296.4750    0    4 66332.0000 66296.4750  0.05%     -    2s
     0     0 66297.2642    0    5 66332.0000 66297.2642  0.05%     -    2s
     0     0 66297.4635    0    5 66332.0000 66297.4635  0.05%     -    2s
     0     0 66297.4635    0    5 66332.0000 66297.4635  0.05%     -    2s
     0     0     cutoff    0      66332.0000 66332.0000   0.0%     -    3s

Cutting planes:
  Gomory: 3
  Flow cover: 5

Explored 0 nodes (8672 simplex iterations) in 3.06 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.633200000000e+04, best bound 6.633200000000e+04, gap 0.0%