Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:01:29 2013

Optimize a model with 45627 rows, 44957 columns and 179627 nonzeros
Presolve removed 3287 rows and 0 columns
Presolve time: 0.27s
Presolved: 42340 rows, 44957 columns, 173053 nonzeros
Variable types: 44890 continuous, 67 integer (67 binary)

Root relaxation: objective 7.334278e+04, 9002 iterations, 1.69 seconds

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

     0     0 73342.7801    0    3          - 73342.7801     -      -    2s
H    0     0                    74250.000000 73342.7801  1.22%     -    2s
H    0     0                    73748.000000 73342.7801  0.55%     -    2s
     0     0 73342.8442    0    4 73748.0000 73342.8442  0.55%     -    2s
     0     0 73342.8442    0    4 73748.0000 73342.8442  0.55%     -    3s
     0     0 73342.8442    0    3 73748.0000 73342.8442  0.55%     -    5s
     0     0 73342.8448    0    4 73748.0000 73342.8448  0.55%     -    6s
     0     0 73342.8448    0    4 73748.0000 73342.8448  0.55%     -    6s
     0     2 73366.5015    0    4 73748.0000 73366.5015  0.52%     -    7s
H    4     4                    73721.818932 73471.0316  0.34%   116    7s
H    6     5                    73694.456522 73471.0316  0.30%   109    8s
H    9     6                    73673.068966 73471.0316  0.27%  82.7    8s
H   12     8                    73620.000000 73471.0316  0.20%  70.2    8s
*   13     5              10    73602.000000 73471.0316  0.18%  65.2    8s
*   43     5               9    73594.000000 73552.5825  0.06%  55.9    8s
*   46     4               9    73593.000000 73552.5825  0.05%  53.4    8s

Cutting planes:
  Gomory: 2
  Flow cover: 2

Explored 51 nodes (15865 simplex iterations) in 8.98 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.359300000000e+04, best bound 7.359300000000e+04, gap 0.0%