Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:21:09 2013

Optimize a model with 49840 rows, 49140 columns and 196140 nonzeros
Presolve removed 70 rows and 0 columns
Presolve time: 0.22s
Presolved: 49770 rows, 49140 columns, 196070 nonzeros
Variable types: 49070 continuous, 70 integer (70 binary)

Root relaxation: objective 5.722715e+04, 5645 iterations, 3.41 seconds

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

     0     0 57227.1544    0   53          - 57227.1544     -      -    3s
H    0     0                    86937.000000 57227.1544  34.2%     -    6s
     0     0 73361.3367    0    9 86937.0000 73361.3367  15.6%     -   11s
H    0     0                    85119.741762 73361.3367  13.8%     -   11s
H    0     0                    80154.000000 73361.3367  8.47%     -   11s
     0     0 75114.3439    0    5 80154.0000 75114.3439  6.29%     -   13s
     0     0 75216.6346    0    2 80154.0000 75216.6346  6.16%     -   13s
H    0     0                    75959.792468 75216.6346  0.98%     -   13s
H    0     0                    75447.000000 75216.6346  0.31%     -   13s
     0     2 75217.0987    0    2 75447.0000 75217.0987  0.30%     -   14s
H    3     2                    75427.913043 75248.5406  0.24%  73.7   14s
*    4     2               3    75306.000000 75248.5406  0.08%   118   14s
     6     2 75261.5926    3    2 75306.0000 75261.5926  0.06%   104   15s

Cutting planes:
  Implied bound: 62

Explored 9 nodes (13113 simplex iterations) in 15.17 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.530600000000e+04, best bound 7.530600000000e+04, gap 0.0%