Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:47:57 2013

Optimize a model with 680 rows, 24260 columns and 248680 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.49s
Presolved: 660 rows, 24240 columns, 228660 nonzeros
Variable types: 24040 continuous, 200 integer (200 binary)

Root relaxation: objective 4.013975e+04, 427 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    6          - 40139.7487     -      -    0s
     0     0 40139.7487    0    6          - 40139.7487     -      -    1s
     0     0 40139.7487    0    6          - 40139.7487     -      -    1s
     0     0 40139.7597    0    6          - 40139.7597     -      -    1s
     0     0 40139.7597    0    6          - 40139.7597     -      -    1s
     0     2 40140.6913    0    6          - 40140.6913     -      -    4s
    58    60 40237.7676   53    1          - 40143.6853     -    5.1    5s
*   77    26              72    40249.201391 40143.6853  0.26%   4.2    5s
*  149    76              70    40211.299925 40144.5957  0.17%   3.6    5s
*  171    23              21    40195.260508 40185.1477  0.03%   3.6    5s

Cutting planes:
  Flow cover: 4

Explored 177 nodes (1349 simplex iterations) in 5.75 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.019526050843e+04, best bound 4.019188041770e+04, gap 0.0084%