Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:41:15 2012

Optimize a model with 191 rows, 137 columns and 612 nonzeros
Presolve time: 0.00s
Presolved: 191 rows, 137 columns, 612 nonzeros
Variable types: 0 continuous, 137 integer (137 binary)
Found heuristic solution: objective 46.0000000
Found heuristic solution: objective 43.0000000

Root relaxation: objective 0.000000e+00, 67 iterations, 0.00 seconds

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

     0     0    0.00000    0   42   43.00000    0.00000   100%     -    0s
H    0     0                      33.0000000    0.00000   100%     -    0s
     0     0    0.78571    0   44   33.00000    0.78571  97.6%     -    0s
     0     0    0.92517    0   46   33.00000    0.92517  97.2%     -    0s
     0     0    0.92857    0   44   33.00000    0.92857  97.2%     -    0s
     0     0    0.95238    0   44   33.00000    0.95238  97.1%     -    0s
     0     0    0.95238    0   44   33.00000    0.95238  97.1%     -    0s
     0     0    0.95238    0   44   33.00000    0.95238  97.1%     -    0s
     0     2    0.95238    0   44   33.00000    0.95238  97.1%     -    0s
H   27    27                      28.0000000    4.09524  85.4%  24.1    0s
*   29    24              18      27.0000000    4.09524  84.8%  23.4    0s
*   49    38              12      26.0000000    4.13605  84.1%  24.5    0s
H   81    47                      25.0000000    7.76000  69.0%  20.0    0s
*   99    48              13      24.0000000    8.00000  66.7%  20.1    0s
*  240    61              12      22.0000000   12.00000  45.5%  18.8    0s
*  273    52               9      21.0000000   12.42105  40.9%  18.5    0s

Cutting planes:
  Gomory: 1
  Zero half: 5

Explored 471 nodes (8342 simplex iterations) in 0.23 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.100000000000e+01, best bound 2.100000000000e+01, gap 0.0%