Gurobi 5.0.1 (linux64) logging started Fri Jan 18 04:17:13 2013

Optimize a model with 600 rows, 14440 columns and 96340 nonzeros
Presolve removed 20 rows and 2260 columns
Presolve time: 0.15s
Presolved: 580 rows, 12180 columns, 88340 nonzeros
Variable types: 12020 continuous, 160 integer (160 binary)

Root relaxation: objective 4.013975e+04, 500 iterations, 0.02 seconds

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

     0     0 40139.7487    0   10          - 40139.7487     -      -    0s
     0     0 40139.7487    0   10          - 40139.7487     -      -    0s
     0     0 40139.7487    0   10          - 40139.7487     -      -    0s
     0     0 40139.8040    0   10          - 40139.8040     -      -    0s
     0     0 40139.8040    0   10          - 40139.8040     -      -    0s
     0     2 40144.0065    0   10          - 40144.0065     -      -    1s
*   67    52              59    40243.979822 40144.6732  0.25%   4.8    1s
*   83    23              15    40196.640772 40147.1200  0.12%   4.6    1s
*   85    21              13    40196.459996 40147.1200  0.12%   4.5    1s
*  100    20              13    40195.185018 40147.5893  0.12%   4.6    1s

Cutting planes:
  Flow cover: 4

Explored 174 nodes (1815 simplex iterations) in 1.91 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.019518501810e+04, best bound 4.019119748665e+04, gap 0.0099%