Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:05:00 2013

Optimize a model with 45694 rows, 45024 columns and 179694 nonzeros
Presolve removed 67 rows and 0 columns
Presolve time: 0.20s
Presolved: 45627 rows, 45024 columns, 179627 nonzeros
Variable types: 44957 continuous, 67 integer (67 binary)

Root relaxation: objective 5.628040e+04, 5723 iterations, 3.20 seconds

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

     0     0 56280.4030    0   52          - 56280.4030     -      -    3s
H    0     0                    87561.000000 56280.4030  35.7%     -    5s
     0     0 67661.8221    0   18 87561.0000 67661.8221  22.7%     -   11s
H    0     0                    77717.000000 67661.8221  12.9%     -   11s
     0     0 71512.2161    0    6 77717.0000 71512.2161  7.98%     -   13s
H    0     0                    76465.000000 71512.2161  6.48%     -   13s
     0     0 71544.3545    0    5 76465.0000 71544.3545  6.44%     -   14s
H    0     0                    75247.739128 71544.3545  4.92%     -   14s
H    0     0                    73836.000000 71544.3545  3.10%     -   14s
H    0     0                    71815.000000 71544.3545  0.38%     -   14s
     0     0 71592.0977    0    4 71815.0000 71592.0977  0.31%     -   15s
H    0     0                    71615.000000 71592.0977  0.03%     -   15s
     0     0 71613.0588    0    1 71615.0000 71613.0588  0.00%     -   15s

Cutting planes:
  Implied bound: 64

Explored 0 nodes (13371 simplex iterations) in 15.83 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.161500000000e+04, best bound 7.161305882353e+04, gap 0.0027%