Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:05 2012

Optimize a model with 435 rows, 136 columns and 870 nonzeros
Presolve removed 89 rows and 4 columns
Presolve time: 0.00s
Presolved: 346 rows, 132 columns, 734 nonzeros
Variable types: 0 continuous, 132 integer (132 binary)
Found heuristic solution: objective 49.0000000

Root relaxation: objective 5.950000e+01, 190 iterations, 0.00 seconds

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

     0     0   59.50000    0   93   49.00000   59.50000  21.4%     -    0s
H    0     0                      50.0000000   59.50000  19.0%     -    0s
     0     0   58.00000    0  104   50.00000   58.00000  16.0%     -    0s
     0     0   57.50000    0  127   50.00000   57.50000  15.0%     -    0s
     0     0   57.00000    0  119   50.00000   57.00000  14.0%     -    0s
     0     0   56.53571    0  130   50.00000   56.53571  13.1%     -    0s
     0     0   55.81481    0  131   50.00000   55.81481  11.6%     -    0s
     0     0   55.52174    0  126   50.00000   55.52174  11.0%     -    0s
     0     0   55.46137    0  130   50.00000   55.46137  10.9%     -    0s
     0     0   55.43501    0  131   50.00000   55.43501  10.9%     -    0s
     0     0   55.43501    0  129   50.00000   55.43501  10.9%     -    0s
H    0     0                      51.0000000   55.43501  8.70%     -    0s
     0     2   55.42494    0  129   51.00000   55.42494  8.68%     -    0s
*    9     7               7      52.0000000   55.40776  6.55%  28.6    0s
H   85     4                      53.0000000   54.38462  2.61%  22.0    0s

Cutting planes:
  Zero half: 73

Explored 92 nodes (2844 simplex iterations) in 0.13 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.300000000000e+01, best bound 5.300000000000e+01, gap 0.0%