Gurobi 5.0.1 (linux64) logging started Sat Dec  8 03:33:12 2012

Optimize a model with 1635 rows, 1620 columns and 5927 nonzeros
Presolve removed 170 rows and 41 columns
Presolve time: 0.01s
Presolved: 1465 rows, 1579 columns, 5579 nonzeros
Variable types: 1408 continuous, 171 integer (171 binary)

Root relaxation: objective 6.288285e+04, 283 iterations, 0.00 seconds

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

     0     0 62882.8532    0   10          - 62882.8532     -      -    0s
     0     0 62907.6176    0   23          - 62907.6176     -      -    0s
     0     0 62930.5584    0   21          - 62930.5584     -      -    0s
     0     0 62934.9341    0   22          - 62934.9341     -      -    0s
H    0     0                    84040.000000 62934.9341  25.1%     -    0s
     0     2 62935.3266    0   22 84040.0000 62935.3266  25.1%     -    0s
H   27    24                    63317.000000 62985.1658  0.52%   4.3    0s
*   41    34              36    63275.000000 62985.1658  0.46%   4.5    0s
H  135    45                    63182.000000 63012.3810  0.27%   5.5    0s
*  153    54              25    63176.000000 63012.3810  0.26%   5.1    0s
*  184    52              26    63165.000000 63016.6501  0.23%   4.8    0s
*  243    53              27    63143.000000 63037.7069  0.17%   4.8    0s
*  326    23              22    63135.000000 63088.8296  0.07%   4.9    0s

Cutting planes:
  Gomory: 3
  Flow cover: 14

Explored 345 nodes (2014 simplex iterations) in 0.29 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.313500000000e+04, best bound 6.312878194616e+04, gap 0.0098%