Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:01:10 2013

Optimize a model with 58596 rows, 57836 columns and 231116 nonzeros
Presolve removed 2211 rows and 0 columns
Presolve time: 0.36s
Presolved: 56385 rows, 57836 columns, 226694 nonzeros
Variable types: 57760 continuous, 76 integer (76 binary)

Root relaxation: objective 8.330364e+04, 11604 iterations, 2.22 seconds

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

     0     0 83303.6363    0    3          - 83303.6363     -      -    2s
H    0     0                    84597.000000 83303.6363  1.53%     -    2s
H    0     0                    83944.000000 83303.6363  0.76%     -    3s
     0     0 83305.4376    0    4 83944.0000 83305.4376  0.76%     -    3s
     0     0 83305.6447    0    4 83944.0000 83305.6447  0.76%     -    3s
     0     0 83305.6447    0    4 83944.0000 83305.6447  0.76%     -    4s
     0     2 83306.0767    0    4 83944.0000 83306.0767  0.76%     -    6s
H    5     5                    83937.000000 83421.8548  0.61%   112    6s
H   13     8                    83713.000000 83421.8548  0.35%  77.5    7s
H   27     5                    83632.000000 83484.9659  0.18%   116    8s
*   30     6               4    83607.000000 83493.6318  0.14%   122    9s
H   45     5                    83591.941176 83514.6129  0.09%  96.1    9s
*   46     2               9    83531.000000 83514.6129  0.02%  94.8    9s

Cutting planes:
  Gomory: 1
  Flow cover: 7

Explored 49 nodes (16008 simplex iterations) in 9.66 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.353100000000e+04, best bound 8.353100000000e+04, gap 0.0%