Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:48:11 2013

Optimize a model with 4280 rows, 8040 columns and 24020 nonzeros
Presolve removed 60 rows and 40 columns
Presolve time: 0.20s
Presolved: 4220 rows, 8000 columns, 19960 nonzeros
Variable types: 6020 continuous, 1980 integer (1980 binary)

Root relaxation: objective 4.013975e+04, 1611 iterations, 0.03 seconds

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

     0     0 40139.7487    0    2          - 40139.7487     -      -    0s
     0     0 40144.2918    0    2          - 40144.2918     -      -    0s
     0     0 40144.2942    0    2          - 40144.2942     -      -    0s
H    0     0                    40238.726267 40144.2942  0.23%     -    0s
     0     0 40144.2942    0    2 40238.7263 40144.2942  0.23%     -    0s
H    0     0                    40196.911697 40144.2942  0.13%     -    0s
     0     0 40144.2942    0    2 40196.9117 40144.2942  0.13%     -    0s
     0     0 40148.3461    0    2 40196.9117 40148.3461  0.12%     -    0s
     0     0 40148.3461    0    2 40196.9117 40148.3461  0.12%     -    0s
     0     2 40150.8340    0    2 40196.9117 40150.8340  0.11%     -    0s
*  466   119              12    40195.331968 40181.3112  0.03%   2.5    1s
H  841    29                    40195.179678 40191.1635  0.01%   2.6    1s

Cutting planes:
  Gomory: 2
  Flow cover: 3

Explored 841 nodes (4471 simplex iterations) in 1.52 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.019517967753e+04, best bound 4.019116353513e+04, gap 0.0100%