Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:49:47 2013

Optimize a model with 55648 rows, 54908 columns and 219188 nonzeros
Presolve removed 74 rows and 0 columns
Presolve time: 0.25s
Presolved: 55574 rows, 54908 columns, 219114 nonzeros
Variable types: 54834 continuous, 74 integer (74 binary)

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    7329    6.7491044e+04   7.949008e+03   0.000000e+00      5s
    7502    6.7501307e+04   0.000000e+00   0.000000e+00      6s

Root relaxation: objective 6.750131e+04, 7502 iterations, 5.55 seconds

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

     0     0 67501.3073    0   64          - 67501.3073     -      -    6s
H    0     0                    117724.00000 67501.3073  42.7%     -   10s
     0     0 88213.6192    0   13 117724.000 88213.6192  25.1%     -   19s
H    0     0                    101295.84709 88213.6192  12.9%     -   19s
H    0     0                    96559.000000 88213.6192  8.64%     -   19s
     0     0 89306.9734    0    9 96559.0000 89306.9734  7.51%     -   20s
H    0     0                    93460.000000 89306.9734  4.44%     -   21s
H    0     0                    89432.000000 89306.9734  0.14%     -   21s
     0     0 89319.7631    0    4 89432.0000 89319.7631  0.13%     -   21s
     0     2 89321.1384    0    4 89432.0000 89321.1384  0.12%     -   22s
H    1     1                    89429.000000 89321.1384  0.12%   0.0   22s
H    2     2                    89353.909091 89347.8889  0.01%   105   22s

Cutting planes:
  Implied bound: 69

Explored 2 nodes (15496 simplex iterations) in 22.91 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.935390909091e+04, best bound 8.934788888889e+04, gap 0.0067%