Gurobi 5.0.1 (linux64) logging started Wed Apr 24 03:34:51 2013

Optimize a model with 63358 rows, 62568 columns and 249798 nonzeros
Presolve removed 79 rows and 0 columns
Presolve time: 0.29s
Presolved: 63279 rows, 62568 columns, 249719 nonzeros
Variable types: 62489 continuous, 79 integer (79 binary)

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    7265    6.2135356e+04   6.825005e+04   0.000000e+00      5s
    8246    6.2338309e+04   0.000000e+00   0.000000e+00      7s

Root relaxation: objective 6.233831e+04, 8246 iterations, 7.02 seconds

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

     0     0 62338.3094    0   59          - 62338.3094     -      -    7s
H    0     0                    98573.000000 62338.3094  36.8%     -   11s
H    0     0                    87597.000000 62338.3094  28.8%     -   27s
     0     0 77815.0642    0   23 87597.0000 77815.0642  11.2%     -   36s
     0     0 83375.3548    0    9 87597.0000 83375.3548  4.82%     -   39s
     0     0 84933.0928    0    3 87597.0000 84933.0928  3.04%     -   41s
H    0     0                    87385.909136 84933.0928  2.81%     -   41s
H    0     0                    86957.000000 84933.0928  2.33%     -   41s
H    0     0                    85483.000000 84933.0928  0.64%     -   41s
     0     2 84945.4423    0    3 85483.0000 84945.4423  0.63%     -   42s
*    9     4               7    85383.000000 85248.0437  0.16%   282   44s

Cutting planes:
  Implied bound: 78

Explored 15 nodes (20997 simplex iterations) in 44.60 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.538300000000e+04, best bound 8.537449557522e+04, gap 0.0100%