Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:33 2012

Optimize a model with 381 rows, 127 columns and 762 nonzeros
Presolve removed 80 rows and 8 columns
Presolve time: 0.00s
Presolved: 301 rows, 119 columns, 635 nonzeros
Variable types: 0 continuous, 119 integer (119 binary)
Found heuristic solution: objective 48.0000000

Root relaxation: objective 5.650000e+01, 198 iterations, 0.00 seconds

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

     0     0   56.50000    0   94   48.00000   56.50000  17.7%     -    0s
     0     0   55.50000    0   99   48.00000   55.50000  15.6%     -    0s
     0     0   54.58824    0  117   48.00000   54.58824  13.7%     -    0s
     0     0   54.18182    0  116   48.00000   54.18182  12.9%     -    0s
     0     0   54.04327    0  118   48.00000   54.04327  12.6%     -    0s
     0     0   53.80137    0  118   48.00000   53.80137  12.1%     -    0s
H    0     0                      49.0000000   53.80137  9.80%     -    0s
     0     0   53.61667    0  112   49.00000   53.61667  9.42%     -    0s
H    0     0                      50.0000000   53.61667  7.23%     -    0s
     0     0   53.54891    0  118   50.00000   53.54891  7.10%     -    0s
     0     0   53.46023    0  119   50.00000   53.46023  6.92%     -    0s
     0     0   53.44737    0  119   50.00000   53.44737  6.89%     -    0s
     0     0   53.44737    0  118   50.00000   53.44737  6.89%     -    0s
     0     2   53.44737    0  118   50.00000   53.44737  6.89%     -    0s
H   84     9                      51.0000000   52.50000  2.94%  21.7    0s

Cutting planes:
  Gomory: 4
  Zero half: 85

Explored 96 nodes (2908 simplex iterations) in 0.13 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%