Gurobi 5.0.1 (linux64) logging started Sun Dec  9 06:10:57 2012

Optimize a model with 570 rows, 540 columns and 1789 nonzeros
Presolve removed 28 rows and 17 columns
Presolve time: 0.01s
Presolved: 542 rows, 523 columns, 1721 nonzeros
Variable types: 349 continuous, 174 integer (174 binary)

Root relaxation: objective 5.247878e+04, 267 iterations, 0.00 seconds

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

     0     0 52478.7831    0   87          - 52478.7831     -      -    0s
H    0     0                    83460.000000 52478.7831  37.1%     -    0s
     0     0 62457.0263    0   39 83460.0000 62457.0263  25.2%     -    0s
     0     0 63040.5611    0   27 83460.0000 63040.5611  24.5%     -    0s
     0     0 63082.3655    0   16 83460.0000 63082.3655  24.4%     -    0s
     0     0 63091.2380    0   13 83460.0000 63091.2380  24.4%     -    0s
     0     0 63095.7015    0   14 83460.0000 63095.7015  24.4%     -    0s
H    0     0                    63592.000000 63095.7015  0.78%     -    0s
     0     2 63095.7621    0   14 63592.0000 63095.7621  0.78%     -    0s
H   27    20                    63351.000000 63098.2013  0.40%   2.2    0s
H  432   127                    63333.000000 63243.9080  0.14%   3.0    0s

Cutting planes:
  Gomory: 13
  Flow cover: 82
  Flow path: 54

Explored 715 nodes (2604 simplex iterations) in 0.23 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.333300000000e+04, best bound 6.332685384433e+04, gap 0.0097%