Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:58:59 2013

Optimize a model with 44352 rows, 43692 columns and 174372 nonzeros
Presolve removed 66 rows and 0 columns
Presolve time: 0.19s
Presolved: 44286 rows, 43692 columns, 174306 nonzeros
Variable types: 43626 continuous, 66 integer (66 binary)

Root relaxation: objective 5.480894e+04, 5410 iterations, 3.30 seconds

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

     0     0 54808.9377    0   54          - 54808.9377     -      -    3s
H    0     0                    84295.000000 54808.9377  35.0%     -    6s
     0     0 70337.8816    0   13 84295.0000 70337.8816  16.6%     -   11s
H    0     0                    80648.000000 70337.8816  12.8%     -   11s
     0     0 72505.0699    0    7 80648.0000 72505.0699  10.1%     -   13s
H    0     0                    78424.000000 72505.0699  7.55%     -   13s
     0     0 72721.5394    0    3 78424.0000 72721.5394  7.27%     -   14s
H    0     0                    74987.697074 72721.5394  3.02%     -   14s
H    0     0                    73712.000000 72721.5394  1.34%     -   14s
H    0     0                    73569.000000 72721.5394  1.15%     -   14s
     0     2 72746.7193    0    3 73569.0000 72746.7193  1.12%     -   15s
H    3     3                    73296.100000 72832.5622  0.63%   161   15s
*   17     8              16    73082.000000 72838.6957  0.33%   115   17s
*   23     6               9    72995.000000 72864.4742  0.18%   114   17s

Cutting planes:
  Implied bound: 63

Explored 39 nodes (16478 simplex iterations) in 18.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.299500000000e+04, best bound 7.299500000000e+04, gap 0.0%