Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:08:39 2013

Optimize a model with 47056 rows, 46376 columns and 185096 nonzeros
Presolve removed 68 rows and 0 columns
Presolve time: 0.21s
Presolved: 46988 rows, 46376 columns, 185028 nonzeros
Variable types: 46308 continuous, 68 integer (68 binary)

Root relaxation: objective 5.091286e+04, 5065 iterations, 2.78 seconds

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

     0     0 50912.8604    0   47          - 50912.8604     -      -    3s
H    0     0                    68549.000000 50912.8604  25.7%     -    4s
H    0     0                    60720.000000 50912.8604  16.2%     -   11s
     0     0 57929.4300    0   19 60720.0000 57929.4300  4.60%     -   16s
     0     0 59485.0348    0   13 60720.0000 59485.0348  2.03%     -   17s
     0     0 59824.5794    0    7 60720.0000 59824.5794  1.47%     -   18s
H    0     0                    60173.000000 59824.5794  0.58%     -   18s
     0     2 59830.3249    0    7 60173.0000 59830.3249  0.57%     -   19s
     3     5 59914.2162    3    2 60173.0000 59914.2162  0.43%  96.7   20s
H    5     5                    60044.500000 59929.5000  0.19%  87.0   20s
*    6     3               6    59936.000000 59936.0000   0.0%   113   20s

Cutting planes:
  Implied bound: 61

Explored 7 nodes (11197 simplex iterations) in 20.34 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.993600000000e+04, best bound 5.993600000000e+04, gap 0.0%