Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:04:26 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 1.937272e+04, 129 iterations, 0.00 seconds

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

     0     0 19372.7157    0   10          - 19372.7157     -      -    0s
     0     0 19373.2416    0   10          - 19373.2416     -      -    0s
     0     0 19441.7242    0    9          - 19441.7242     -      -    0s
     0     0 19441.7242    0    9          - 19441.7242     -      -    0s
H    0     0                    19939.682932 19441.7242  2.50%     -    0s
     0     2 19441.7242    0    9 19939.6829 19441.7242  2.50%     -    0s
*   18    13              16    19518.547794 19497.2832  0.11%   9.1    0s
*   45    13              16    19514.480572 19510.8505  0.02%   5.3    0s

Cutting planes:
  Flow cover: 1

Explored 75 nodes (745 simplex iterations) in 0.63 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.951448057178e+04, best bound 1.951260629062e+04, gap 0.0096%