Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:43:53 2013

Optimize a model with 420 rows, 4260 columns and 8800 nonzeros
Presolve removed 40 rows and 40 columns
Presolve time: 0.02s
Presolved: 380 rows, 4220 columns, 8660 nonzeros
Variable types: 4140 continuous, 80 integer (80 binary)

Root relaxation: objective 4.370285e+04, 603 iterations, 0.01 seconds

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

     0     0 43702.8549    0    2          - 43702.8549     -      -    0s
     0     0 43723.5780    0    1          - 43723.5780     -      -    0s
     0     0 43723.9795    0    2          - 43723.9795     -      -    0s
     0     0 43725.4385    0    1          - 43725.4385     -      -    0s
     0     0 43726.3067    0    1          - 43726.3067     -      -    0s
     0     0 43726.5548    0    1          - 43726.5548     -      -    0s
     0     0 43726.5548    0    1          - 43726.5548     -      -    0s
     0     0 43726.5548    0    1          - 43726.5548     -      -    0s
H    0     0                    44033.613407 43726.5548  0.70%     -    0s
     0     2 43733.6678    0    1 44033.6134 43733.6678  0.68%     -    0s
*   11     3              11    44000.669969 43835.2232  0.38%  14.4    0s
*   27     2               4    43899.817028 43896.9453  0.01%  13.9    0s

Cutting planes:
  Flow cover: 8

Explored 28 nodes (1080 simplex iterations) in 0.17 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.389981702769e+04, best bound 4.389694531587e+04, gap 0.0065%