Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:04:33 2013

Optimize a model with 300 rows, 6220 columns and 46170 nonzeros
Presolve removed 10 rows and 1130 columns
Presolve time: 0.07s
Presolved: 290 rows, 5090 columns, 42170 nonzeros
Variable types: 5010 continuous, 80 integer (80 binary)

Root relaxation: objective 2.337984e+04, 159 iterations, 0.00 seconds

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

     0     0 23379.8401    0    5          - 23379.8401     -      -    0s
     0     0 23380.4125    0    5          - 23380.4125     -      -    0s
     0     0 23512.6956    0    9          - 23512.6956     -      -    0s
     0     0 23512.6956    0    9          - 23512.6956     -      -    0s
     0     2 23512.7928    0    9          - 23512.7928     -      -    0s
*   44    28              41    23571.291738 23512.7928  0.25%   4.7    0s
*   58    17              13    23529.060336 23512.8301  0.07%   4.1    0s
*   59    16              13    23528.611601 23512.8301  0.07%   4.1    0s
*   83    14               8    23527.307569 23518.4387  0.04%   3.7    0s

Cutting planes:
  Flow cover: 1

Explored 121 nodes (868 simplex iterations) in 0.64 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.352730756914e+04, best bound 2.352604150537e+04, gap 0.0054%