Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:49 2012

Optimize a model with 435 rows, 133 columns and 870 nonzeros
Presolve removed 89 rows and 4 columns
Presolve time: 0.00s
Presolved: 346 rows, 129 columns, 733 nonzeros
Variable types: 0 continuous, 129 integer (129 binary)
Found heuristic solution: objective 45.0000000

Root relaxation: objective 5.800000e+01, 184 iterations, 0.00 seconds

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

     0     0   58.00000    0  106   45.00000   58.00000  28.9%     -    0s
H    0     0                      47.0000000   58.00000  23.4%     -    0s
     0     0   56.16667    0  121   47.00000   56.16667  19.5%     -    0s
     0     0   55.25000    0  118   47.00000   55.25000  17.6%     -    0s
     0     0   55.20833    0  129   47.00000   55.20833  17.5%     -    0s
     0     0   54.90580    0  127   47.00000   54.90580  16.8%     -    0s
H    0     0                      48.0000000   54.90580  14.4%     -    0s
     0     0   54.44993    0  128   48.00000   54.44993  13.4%     -    0s
H    0     0                      49.0000000   54.44993  11.1%     -    0s
     0     0   54.26365    0  129   49.00000   54.26365  10.7%     -    0s
     0     0   54.25391    0  129   49.00000   54.25391  10.7%     -    0s
     0     0   54.25391    0  128   49.00000   54.25391  10.7%     -    0s
     0     2   54.24896    0  128   49.00000   54.24896  10.7%     -    0s
*   63    20              10      50.0000000   53.85444  7.71%  27.1    0s

Cutting planes:
  Gomory: 1
  Zero half: 83

Explored 220 nodes (6467 simplex iterations) in 0.25 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0%