Gurobi 5.0.1 (linux64) logging started Sat Dec  8 03:33:08 2012

Optimize a model with 1635 rows, 1620 columns and 5912 nonzeros
Presolve removed 201 rows and 58 columns
Presolve time: 0.02s
Presolved: 1434 rows, 1562 columns, 5519 nonzeros
Variable types: 1392 continuous, 170 integer (170 binary)

Root relaxation: objective 6.224320e+04, 279 iterations, 0.00 seconds

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

     0     0 62243.1989    0   18          - 62243.1989     -      -    0s
H    0     0                    64837.000000 62243.1989  4.00%     -    0s
H    0     0                    63162.000000 62243.1989  1.45%     -    0s
     0     0 62345.5068    0   23 63162.0000 62345.5068  1.29%     -    0s
     0     0 62346.2230    0   24 63162.0000 62346.2230  1.29%     -    0s
     0     2 62350.9793    0   24 63162.0000 62350.9793  1.28%     -    0s
H   32    30                    63143.000000 62394.1859  1.19%   7.6    0s
*   37    34              33    63041.000000 62394.1859  1.03%   7.1    0s
*   41    30              34    63027.000000 62394.1859  1.00%   6.7    0s
H  155    84                    62929.000000 62466.7061  0.73%   7.1    0s
H  176    97                    62903.000000 62466.7061  0.69%   7.1    0s
*  181    80              26    62835.000000 62466.7061  0.59%   7.0    0s
*  277   107              25    62763.000000 62491.8777  0.43%   6.4    0s
*  360   120              14    62757.000000 62534.6362  0.35%   6.3    0s
*  420    93              16    62706.000000 62574.6225  0.21%   6.2    0s
*  442    62              17    62674.000000 62589.4815  0.13%   6.1    0s

Cutting planes:
  Gomory: 3
  Flow cover: 8

Explored 544 nodes (3356 simplex iterations) in 0.36 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.267400000000e+04, best bound 6.266927745985e+04, gap 0.0075%