Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:34:27 2013

Optimize a model with 52704 rows, 51984 columns and 207504 nonzeros
Presolve removed 72 rows and 0 columns
Presolve time: 0.24s
Presolved: 52632 rows, 51984 columns, 207432 nonzeros
Variable types: 51912 continuous, 72 integer (72 binary)

Root relaxation: objective 6.023512e+04, 6686 iterations, 4.27 seconds

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

     0     0 60235.1245    0   54          - 60235.1245     -      -    4s
H    0     0                    96938.000000 60235.1245  37.9%     -    8s
     0     0 80559.1364    0    9 96938.0000 80559.1364  16.9%     -   14s
H    0     0                    88723.232488 80559.1364  9.20%     -   14s
H    0     0                    86235.000000 80559.1364  6.58%     -   14s
     0     0 83043.9804    0    7 86235.0000 83043.9804  3.70%     -   15s
     0     0 83368.4201    0    5 86235.0000 83368.4201  3.32%     -   16s
     0     0 83509.9629    0    4 86235.0000 83509.9629  3.16%     -   17s
H    0     0                    85989.000000 83509.9629  2.88%     -   17s
H    0     0                    83663.000000 83509.9629  0.18%     -   17s
     0     2 83510.1719    0    4 83663.0000 83510.1719  0.18%     -   18s

Cutting planes:
  Implied bound: 64

Explored 17 nodes (16524 simplex iterations) in 19.25 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.366300000000e+04, best bound 8.366146464646e+04, gap 0.0018%