Gurobi 5.0.1 (linux64) logging started Sat Dec  8 03:33:11 2012

Optimize a model with 1635 rows, 1620 columns and 5903 nonzeros
Presolve removed 436 rows and 108 columns
Presolve time: 0.02s
Presolved: 1199 rows, 1512 columns, 4947 nonzeros
Variable types: 1359 continuous, 153 integer (153 binary)

Root relaxation: objective 6.177808e+04, 264 iterations, 0.00 seconds

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

     0     0 61778.0845    0   14          - 61778.0845     -      -    0s
H    0     0                    64089.000000 61778.0845  3.61%     -    0s
     0     0 61863.7597    0   19 64089.0000 61863.7597  3.47%     -    0s
     0     0 61879.8172    0   20 64089.0000 61879.8172  3.45%     -    0s
     0     0 61886.8254    0   21 64089.0000 61886.8254  3.44%     -    0s
     0     0 61892.6801    0   25 64089.0000 61892.6801  3.43%     -    0s
     0     2 61895.1074    0   25 64089.0000 61895.1074  3.42%     -    0s
H   18    14                    62293.000000 61977.9704  0.51%   3.5    0s
*   19    11              19    62045.000000 61977.9704  0.11%   3.5    0s

Cutting planes:
  Gomory: 2
  Cover: 1
  Implied bound: 1
  Flow cover: 11

Explored 31 nodes (428 simplex iterations) in 0.10 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.204500000000e+04, best bound 6.204500000000e+04, gap 0.0%