Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:17:36 2013

Optimize a model with 29754 rows, 29214 columns and 116694 nonzeros
Presolve removed 2487 rows and 0 columns
Presolve time: 0.16s
Presolved: 27267 rows, 29214 columns, 111720 nonzeros
Variable types: 29160 continuous, 54 integer (54 binary)

Root relaxation: objective 6.187637e+04, 5726 iterations, 0.64 seconds

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

     0     0 61876.3673    0    3          - 61876.3673     -      -    0s
H    0     0                    62262.000000 61876.3673  0.62%     -    0s
H    0     0                    61929.000000 61876.3673  0.08%     -    1s
     0     0 61887.0259    0    4 61929.0000 61887.0259  0.07%     -    1s
     0     0 61887.0259    0    3 61929.0000 61887.0259  0.07%     -    1s
     0     0 61925.9886    0    3 61929.0000 61925.9886  0.00%     -    1s

Cutting planes:
  Gomory: 2
  Flow cover: 10

Explored 0 nodes (7747 simplex iterations) in 1.79 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.192900000000e+04, best bound 6.192598863870e+04, gap 0.0049%