Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:58:52 2013

Optimize a model with 440 rows, 16040 columns and 32040 nonzeros
Presolve time: 0.02s
Presolved: 440 rows, 16040 columns, 32040 nonzeros
Variable types: 16000 continuous, 40 integer (40 binary)

Root relaxation: objective 4.004597e+04, 481 iterations, 0.01 seconds

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

     0     0 40045.9680    0   10          - 40045.9680     -      -    0s
H    0     0                    41453.000000 40045.9680  3.39%     -    0s
H    0     0                    40914.000000 40045.9680  2.12%     -    0s
     0     0 40447.7905    0    4 40914.0000 40447.7905  1.14%     -    0s
     0     0 40457.7736    0    8 40914.0000 40457.7736  1.12%     -    0s
     0     0 40464.4252    0    5 40914.0000 40464.4252  1.10%     -    0s
     0     0 40469.3171    0    4 40914.0000 40469.3171  1.09%     -    0s
     0     0 40471.0327    0    5 40914.0000 40471.0327  1.08%     -    0s
     0     0 40471.0582    0    6 40914.0000 40471.0582  1.08%     -    0s
     0     0 40471.0645    0    4 40914.0000 40471.0645  1.08%     -    0s
H    0     0                    40676.000000 40471.0645  0.50%     -    0s
     0     0 40471.0733    0    6 40676.0000 40471.0733  0.50%     -    0s
     0     0 40473.0215    0    3 40676.0000 40473.0215  0.50%     -    0s
     0     2 40482.3548    0    3 40676.0000 40482.3548  0.48%     -    0s
*   12     1               5    40627.000000 40626.1290  0.00%  15.5    0s

Cutting planes:
  Implied bound: 134
  Flow cover: 10

Explored 13 nodes (931 simplex iterations) in 0.42 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.062700000000e+04, best bound 4.062612903226e+04, gap 0.0021%