Gurobi 5.0.1 (linux64) logging started Sat Jan 26 20:44:44 2013

Optimize a model with 30 rows, 100 columns and 3000 nonzeros
Presolve time: 0.01s
Presolved: 30 rows, 100 columns, 3000 nonzeros
Variable types: 0 continuous, 100 integer (100 binary)
Found heuristic solution: objective 19276.000000

Root relaxation: objective 2.152482e+04, 58 iterations, 0.00 seconds

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

     0     0 21524.8181    0   20 19276.0000 21524.8181  11.7%     -    0s
H    0     0                    20598.000000 21524.8181  4.50%     -    0s
     0     0 21516.2664    0   19 20598.0000 21516.2664  4.46%     -    0s
H    0     0                    20782.000000 21516.2664  3.53%     -    0s
     0     0 21505.5469    0   20 20782.0000 21505.5469  3.48%     -    0s
     0     0 21502.2940    0   22 20782.0000 21502.2940  3.47%     -    0s
     0     0 21501.4923    0   20 20782.0000 21501.4923  3.46%     -    0s
     0     0 21501.2406    0   22 20782.0000 21501.2406  3.46%     -    0s
     0     2 21501.0523    0   22 20782.0000 21501.0523  3.46%     -    0s
H 1396   811                    20823.000000 21458.1281  3.05%   6.3    0s
H 4585  2887                    20825.000000 21398.6924  2.75%   6.1    1s
H 5679  3452                    20887.000000 21385.9807  2.39%   6.2    1s
H10871  6228                    20944.000000 21349.5664  1.94%   6.3    1s
H25301 12891                    20983.000000 21296.6423  1.49%   6.5    3s
 37140 17630 21036.2032   31   14 20983.0000 21270.2318  1.37%   6.5    5s
 40835 18912 21048.3891   32   28 20983.0000 21264.1703  1.34%   6.5   10s
 78132 23226 21116.8432   39   15 20983.0000 21247.1780  1.26%   6.5   15s
 118780 28275     cutoff   44      20983.0000 21200.8411  1.04%   6.4   20s
 160804 35603 20997.6626   45   14 20983.0000 21170.4289  0.89%   6.3   25s
 204227 39653 21031.7790   48   13 20983.0000 21147.1221  0.78%   6.3   30s
 247934 40822 21029.2400   49   13 20983.0000 21127.9312  0.69%   6.2   35s
 291865 38789 21007.8400   42   12 20983.0000 21108.9587  0.60%   6.1   40s
 337075 32956 20984.2556   49   12 20983.0000 21089.1387  0.51%   6.1   45s
 381760 21248     cutoff   46      20983.0000 21063.6217  0.38%   6.0   50s

Cutting planes:
  Gomory: 15

Explored 419878 nodes (2478754 simplex iterations) in 53.75 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.098300000000e+04, best bound 2.098500000000e+04, gap 0.0095%