Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:33:01 2013

Optimize a model with 36660 rows, 36060 columns and 144060 nonzeros
Presolve removed 1837 rows and 0 columns
Presolve time: 0.21s
Presolved: 34823 rows, 36060 columns, 140386 nonzeros
Variable types: 36000 continuous, 60 integer (60 binary)

Root relaxation: objective 5.963626e+04, 6060 iterations, 0.81 seconds

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

     0     0 59636.2586    0    3          - 59636.2586     -      -    1s
H    0     0                    60518.000000 59636.2586  1.46%     -    1s
     0     0 59639.6485    0    4 60518.0000 59639.6485  1.45%     -    1s
     0     0 59639.6485    0    4 60518.0000 59639.6485  1.45%     -    1s
H    0     0                    59786.500000 59639.6485  0.25%     -    2s
H    0     0                    59757.000000 59639.6485  0.20%     -    2s
     0     0 59715.9231    0    2 59757.0000 59715.9231  0.07%     -    3s
     0     0 59719.3231    0    3 59757.0000 59719.3231  0.06%     -    3s

Cutting planes:
  Gomory: 1

Explored 0 nodes (8466 simplex iterations) in 3.40 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.975700000000e+04, best bound 5.975700000000e+04, gap 0.0%