Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:40:39 2013

Optimize a model with 640 rows, 2520 columns and 6010 nonzeros
Presolve removed 20 rows and 30 columns
Presolve time: 0.03s
Presolved: 620 rows, 2490 columns, 4980 nonzeros
Variable types: 2000 continuous, 490 integer (490 binary)

Root relaxation: objective 2.387367e+04, 213 iterations, 0.00 seconds

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

     0     0 23873.6700    0    1          - 23873.6700     -      -    0s
     0     0 23876.5692    0    2          - 23876.5692     -      -    0s
     0     0 23876.6282    0    2          - 23876.6282     -      -    0s
     0     0 23876.6282    0    2          - 23876.6282     -      -    0s
     0     2 23877.9175    0    2          - 23877.9175     -      -    0s
*   86    17              86    24153.548513 23950.7143  0.84%   2.0    0s
*   88     0               5    23950.714296 23950.7143   0.0%   2.0    0s

Cutting planes:
  Gomory: 1
  Flow cover: 2

Explored 89 nodes (512 simplex iterations) in 0.23 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.395071429558e+04, best bound 2.395071429558e+04, gap 0.0%