Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:03 2012

Optimize a model with 452 rows, 135 columns and 904 nonzeros
Presolve removed 70 rows and 0 columns
Presolve time: 0.00s
Presolved: 382 rows, 135 columns, 806 nonzeros
Variable types: 0 continuous, 135 integer (135 binary)
Found heuristic solution: objective 47.0000000

Root relaxation: objective 5.900000e+01, 201 iterations, 0.00 seconds

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

     0     0   59.00000    0  114   47.00000   59.00000  25.5%     -    0s
     0     0   57.58333    0  127   47.00000   57.58333  22.5%     -    0s
     0     0   56.33333    0  121   47.00000   56.33333  19.9%     -    0s
     0     0   55.58974    0  133   47.00000   55.58974  18.3%     -    0s
     0     0   54.98554    0  132   47.00000   54.98554  17.0%     -    0s
     0     0   54.68148    0  135   47.00000   54.68148  16.3%     -    0s
H    0     0                      48.0000000   54.68148  13.9%     -    0s
     0     0   54.43182    0  135   48.00000   54.43182  13.4%     -    0s
     0     0   54.29268    0  134   48.00000   54.29268  13.1%     -    0s
     0     0   54.28801    0  133   48.00000   54.28801  13.1%     -    0s
     0     0   54.19123    0  134   48.00000   54.19123  12.9%     -    0s
     0     0   54.06198    0  132   48.00000   54.06198  12.6%     -    0s
     0     0   53.99625    0  134   48.00000   53.99625  12.5%     -    0s
     0     0   53.99625    0  134   48.00000   53.99625  12.5%     -    0s
H    0     0                      50.0000000   53.99625  7.99%     -    0s
     0     2   53.99584    0  134   50.00000   53.99584  7.99%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 97

Explored 162 nodes (6433 simplex iterations) in 0.27 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%