Optimize a model with 100 rows, 4950 columns and 9900 nonzeros
Presolve time: 0.01s
Presolved: 100 rows, 4950 columns, 9900 nonzeros
Variable types: 0 continuous, 4950 integer (4950 binary)

Root relaxation: objective 1.995250e+04, 154 iterations, 0.00 seconds

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

     0     0 19952.5000    0   14          - 19952.5000     -      -    0s
     0     0 19968.0000    0   14          - 19968.0000     -      -    0s
     0     0 20086.5833    0   25          - 20086.5833     -      -    0s
     0     0 20109.7500    0   24          - 20109.7500     -      -    0s
     0     0 20143.0000    0    8          - 20143.0000     -      -    0s
     0     0 20148.6667    0   21          - 20148.6667     -      -    0s
     0     0 20177.5000    0   10          - 20177.5000     -      -    0s
     0     0 20179.8333    0   15          - 20179.8333     -      -    0s
     0     2 20184.5000    0   15          - 20184.5000     -      -    0s
*  224   222             163    25410.000000 20391.0000  19.8%   6.0    0s
*  260    78              26    21632.000000 20398.5000  5.70%   6.2    0s
*  431   100              12    21428.000000 20447.5000  4.58%   6.3    1s
*  527    95              11    21411.000000 21130.2500  1.31%   7.4    1s
*  528    26              11    21294.000000 21130.2500  0.77%   7.4    1s

Cutting planes:
  Zero half: 18

Explored 584 nodes (4381 simplex iterations) in 1.61 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.129400000000e+04, best bound 2.129300000000e+04, gap 0.0047%

Gurobi 5.0.1 (linux64) logging started Sun Nov 25 02:43:21 2012