Gurobi 5.0.1 (linux64) logging started Sat Dec  8 03:30:34 2012

Optimize a model with 555 rows, 540 columns and 1781 nonzeros
Presolve removed 41 rows and 25 columns
Presolve time: 0.01s
Presolved: 514 rows, 515 columns, 1681 nonzeros
Variable types: 344 continuous, 171 integer (171 binary)

Root relaxation: objective 5.112406e+04, 253 iterations, 0.00 seconds

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

     0     0 51124.0564    0   87          - 51124.0564     -      -    0s
H    0     0                    81984.000000 51124.0564  37.6%     -    0s
     0     0 61837.7998    0   25 81984.0000 61837.7998  24.6%     -    0s
H    0     0                    74073.534743 61837.7998  16.5%     -    0s
     0     0 62357.4503    0    3 74073.5347 62357.4503  15.8%     -    0s
     0     0 62358.6219    0    5 74073.5347 62358.6219  15.8%     -    0s
H    0     0                    62689.000000 62358.6219  0.53%     -    0s
     0     2 62361.4166    0    5 62689.0000 62361.4166  0.52%     -    0s
H    2     2                    62515.000000 62374.8000  0.22%   1.5    0s
*    3     3               3    62411.000000 62374.8000  0.06%   3.3    0s

Cutting planes:
  Gomory: 10
  Cover: 1
  Flow cover: 56
  Flow path: 39

Explored 6 nodes (386 simplex iterations) in 0.16 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.241100000000e+04, best bound 6.241100000000e+04, gap 0.0%