Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:58:05 2013

Optimize a model with 57150 rows, 56400 columns and 225150 nonzeros
Presolve removed 75 rows and 0 columns
Presolve time: 0.26s
Presolved: 57075 rows, 56400 columns, 225075 nonzeros
Variable types: 56325 continuous, 75 integer (75 binary)

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    6892    6.0210393e+04   3.866631e+03   0.000000e+00      5s
    7344    6.0295268e+04   0.000000e+00   0.000000e+00      6s

Root relaxation: objective 6.029527e+04, 7344 iterations, 5.97 seconds

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

     0     0 60295.2678    0   63          - 60295.2678     -      -    6s
H    0     0                    96761.000000 60295.2678  37.7%     -    9s
     0     0 77606.7312    0   11 96761.0000 77606.7312  19.8%     -   17s
H    0     0                    89346.551508 77606.7312  13.1%     -   17s
H    0     0                    84367.000000 77606.7312  8.01%     -   17s
     0     0 79424.3832    0    5 84367.0000 79424.3832  5.86%     -   19s
     0     0 79556.6103    0    5 84367.0000 79556.6103  5.70%     -   20s
H    0     0                    83289.740602 79556.6103  4.48%     -   21s
H    0     0                    81412.800000 79556.6103  2.28%     -   21s
H    0     0                    79917.000000 79556.6103  0.45%     -   21s
     0     1 79573.8289    0    5 79917.0000 79573.8289  0.43%     -   23s
H   12     4                    79788.000000 79695.1789  0.12%  94.1   24s
*   22     0              13    79747.000000 79747.0000   0.0%   114   25s

Cutting planes:
  Gomory: 1
  Implied bound: 70

Explored 23 nodes (17611 simplex iterations) in 25.03 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.974700000000e+04, best bound 7.974700000000e+04, gap 0.0%