Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:59:19 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 5.831209e+04, 5937 iterations, 3.57 seconds

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

     0     0 58312.0936    0   54          - 58312.0936     -      -    3s
H    0     0                    92755.000000 58312.0936  37.1%     -    6s
     0     0 74579.1464    0   17 92755.0000 74579.1464  19.6%     -   12s
H    0     0                    83137.000000 74579.1464  10.3%     -   12s
     0     0 77306.2144    0    4 83137.0000 77306.2144  7.01%     -   14s
H    0     0                    81794.000000 77306.2144  5.49%     -   14s
H    0     0                    80853.000000 77306.2144  4.39%     -   14s
     0     0 77317.9060    0    3 80853.0000 77317.9060  4.37%     -   14s
H    0     0                    77910.000000 77317.9060  0.76%     -   14s
     0     0 77318.8428    0    2 77910.0000 77318.8428  0.76%     -   14s
     0     2 77318.9887    0    2 77910.0000 77318.9887  0.76%     -   15s
H    3     2                    77686.263736 77648.3516  0.05%   283   16s
*    6     2               5    77670.000000 77657.6000  0.02%   182   16s

Cutting planes:
  Implied bound: 64

Explored 8 nodes (13963 simplex iterations) in 16.29 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.767000000000e+04, best bound 7.766324291498e+04, gap 0.0087%