Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:27 2012

Optimize a model with 361 rows, 123 columns and 722 nonzeros
Presolve removed 51 rows and 4 columns
Presolve time: 0.00s
Presolved: 310 rows, 119 columns, 646 nonzeros
Variable types: 0 continuous, 119 integer (119 binary)
Found heuristic solution: objective 45.0000000

Root relaxation: objective 5.550000e+01, 189 iterations, 0.00 seconds

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

     0     0   55.50000    0   99   45.00000   55.50000  23.3%     -    0s
H    0     0                      48.0000000   55.50000  15.6%     -    0s
     0     0   54.16667    0  118   48.00000   54.16667  12.8%     -    0s
     0     0   53.29412    0  109   48.00000   53.29412  11.0%     -    0s
     0     0   52.80801    0  119   48.00000   52.80801  10.0%     -    0s
     0     0   52.47772    0  115   48.00000   52.47772  9.33%     -    0s
     0     0   52.28571    0  119   48.00000   52.28571  8.93%     -    0s
     0     0   52.25858    0  117   48.00000   52.25858  8.87%     -    0s
H    0     0                      49.0000000   52.25858  6.65%     -    0s
     0     0   52.10511    0  119   49.00000   52.10511  6.34%     -    0s
     0     0   52.04020    0  118   49.00000   52.04020  6.20%     -    0s
     0     0   51.99270    0  119   49.00000   51.99270  6.11%     -    0s
     0     0   51.99270    0  118   49.00000   51.99270  6.11%     -    0s
H    0     0                      50.0000000   51.99270  3.99%     -    0s
     0     2   51.99270    0  118   50.00000   51.99270  3.99%     -    0s
*    9     0               4      51.0000000   51.00000   0.0%  25.3    0s

Cutting planes:
  Gomory: 2
  Zero half: 42

Explored 10 nodes (1029 simplex iterations) in 0.07 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.100000000000e+01, best bound 5.100000000000e+01, gap 0.0%