Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:24:32 2013

Optimize a model with 33117 rows, 32547 columns and 130017 nonzeros
Presolve removed 2266 rows and 0 columns
Presolve time: 0.19s
Presolved: 30851 rows, 32547 columns, 125485 nonzeros
Variable types: 32490 continuous, 57 integer (57 binary)

Root relaxation: objective 6.107813e+04, 4700 iterations, 0.51 seconds

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

     0     0 61078.1272    0    1          - 61078.1272     -      -    0s
H    0     0                    61614.000000 61078.1272  0.87%     -    0s
     0     0 61078.5915    0    2 61614.0000 61078.5915  0.87%     -    1s
     0     0 61078.5915    0    2 61614.0000 61078.5915  0.87%     -    1s
     0     0 61078.5915    0    2 61614.0000 61078.5915  0.87%     -    1s
     0     2 61103.1589    0    2 61614.0000 61103.1589  0.83%     -    2s
H    4     2                    61548.711111 61302.1290  0.40%   135    2s
*    5     2               3    61440.000000 61302.1290  0.22%   120    2s

Cutting planes:
  Gomory: 1
  Flow cover: 3

Explored 8 nodes (5455 simplex iterations) in 2.67 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.144000000000e+04, best bound 6.144000000000e+04, gap 0.0%