Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:16:04 2013

Optimize a model with 440 rows, 4760 columns and 10980 nonzeros
Presolve removed 20 rows and 260 columns
Presolve time: 0.01s
Presolved: 420 rows, 4500 columns, 10580 nonzeros
Variable types: 4420 continuous, 80 integer (80 binary)

Root relaxation: objective 4.370285e+04, 443 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    4          - 43702.8549     -      -    0s
     0     0 43723.5780    0    2          - 43723.5780     -      -    0s
     0     0 43723.6300    0    2          - 43723.6300     -      -    0s
     0     0 43724.0117    0    4          - 43724.0117     -      -    0s
     0     0 43724.0117    0    4          - 43724.0117     -      -    0s
     0     0 43724.8982    0    4          - 43724.8982     -      -    0s
     0     0 43726.5548    0    2          - 43726.5548     -      -    0s
     0     0 43726.5548    0    2          - 43726.5548     -      -    0s
     0     0 43726.5548    0    2          - 43726.5548     -      -    0s
H    0     0                    44529.286095 43726.5548  1.80%     -    0s
     0     2 43730.6678    0    2 44529.2861 43730.6678  1.79%     -    0s
*   13    12              12    44072.841057 43779.4957  0.67%  20.6    0s
*   14    10              12    44059.523259 43779.4957  0.64%  19.3    0s
*   23    12               9    44041.268606 43797.0413  0.55%  14.7    0s
H   54     4                    43900.453435 43878.3309  0.05%  13.4    0s

Cutting planes:
  Flow cover: 8

Explored 61 nodes (1455 simplex iterations) in 0.24 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.390045343473e+04, best bound 4.389694531587e+04, gap 0.0080%