Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:41:16 2012

Optimize a model with 187 rows, 135 columns and 600 nonzeros
Presolve time: 0.00s
Presolved: 187 rows, 135 columns, 600 nonzeros
Variable types: 0 continuous, 135 integer (135 binary)
Found heuristic solution: objective 42.0000000

Root relaxation: objective 0.000000e+00, 60 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   42.00000    0.00000   100%     -    0s
H    0     0                      39.0000000    0.00000   100%     -    0s
H    0     0                      37.0000000    0.00000   100%     -    0s
     0     0    0.55000    0   44   37.00000    0.55000  98.5%     -    0s
H    0     0                      33.0000000    0.55000  98.3%     -    0s
     0     0    0.71963    0   45   33.00000    0.71963  97.8%     -    0s
     0     0    0.80000    0   44   33.00000    0.80000  97.6%     -    0s
     0     0    0.82500    0   45   33.00000    0.82500  97.5%     -    0s
H    0     0                      32.0000000    0.82500  97.4%     -    0s
     0     0    0.91304    0   45   32.00000    0.91304  97.1%     -    0s
     0     0    0.91667    0   46   32.00000    0.91667  97.1%     -    0s
     0     0    0.91667    0   45   32.00000    0.91667  97.1%     -    0s
     0     2    1.10550    0   45   32.00000    1.10550  96.5%     -    0s
*   21    21              11      24.0000000    5.77857  75.9%  22.3    0s
*   51    35              14      22.0000000    5.80833  73.6%  18.0    0s
*  228    64              15      20.0000000   12.70370  36.5%  12.5    0s

Cutting planes:
  Gomory: 1
  Zero half: 4

Explored 494 nodes (5937 simplex iterations) in 0.20 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%