Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:51:16 2013

Optimize a model with 42965 rows, 42315 columns and 169065 nonzeros
Presolve removed 2359 rows and 0 columns
Presolve time: 0.25s
Presolved: 40606 rows, 42315 columns, 164347 nonzeros
Variable types: 42250 continuous, 65 integer (65 binary)

Root relaxation: objective 6.592445e+04, 7413 iterations, 1.08 seconds

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

     0     0 65924.4548    0    4          - 65924.4548     -      -    1s
H    0     0                    67861.000000 65924.4548  2.85%     -    1s
H    0     0                    66547.000000 65924.4548  0.94%     -    1s
     0     0 65930.0681    0    6 66547.0000 65930.0681  0.93%     -    1s
     0     0 65930.1094    0    6 66547.0000 65930.1094  0.93%     -    2s
     0     0 65930.1639    0    7 66547.0000 65930.1639  0.93%     -    2s
     0     0 65930.1924    0    6 66547.0000 65930.1924  0.93%     -    2s
     0     0 65930.5937    0    5 66547.0000 65930.5937  0.93%     -    3s
     0     2 65930.8680    0    5 66547.0000 65930.8680  0.93%     -    4s
H   10     7                    66533.263158 66012.6725  0.78%  66.5    4s
H   11     6                    66129.000000 66012.6725  0.18%  61.0    4s
    12     8 66054.8372   12    1 66129.0000 66012.6725  0.18%  64.1    5s
*   25     0              13    66096.000000 66096.0000   0.0%  57.2    5s

Cutting planes:
  Gomory: 1
  Flow cover: 3

Explored 26 nodes (8960 simplex iterations) in 5.46 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.609600000000e+04, best bound 6.609600000000e+04, gap 0.0%