Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:36 2012

Optimize a model with 448 rows, 129 columns and 896 nonzeros
Presolve removed 72 rows and 0 columns
Presolve time: 0.00s
Presolved: 376 rows, 129 columns, 796 nonzeros
Variable types: 0 continuous, 129 integer (129 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 5.550000e+01, 191 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  107   43.00000   55.50000  29.1%     -    0s
     0     0   54.53846    0  124   43.00000   54.53846  26.8%     -    0s
     0     0   53.54762    0  128   43.00000   53.54762  24.5%     -    0s
     0     0   51.84697    0  125   43.00000   51.84697  20.6%     -    0s
     0     0   51.36000    0  122   43.00000   51.36000  19.4%     -    0s
     0     0   50.80000    0  126   43.00000   50.80000  18.1%     -    0s
H    0     0                      44.0000000   50.80000  15.5%     -    0s
     0     0   50.75000    0  127   44.00000   50.75000  15.3%     -    0s
     0     0   50.73729    0  128   44.00000   50.73729  15.3%     -    0s
     0     0   50.73729    0  126   44.00000   50.73729  15.3%     -    0s
     0     2   50.72807    0  126   44.00000   50.72807  15.3%     -    0s
H   33    17                      46.0000000   50.60000  10.0%  28.5    0s
H   43    14                      47.0000000   50.60000  7.66%  24.6    0s
H   72    14                      48.0000000   50.12500  4.43%  24.8    0s

Cutting planes:
  Zero half: 86

Explored 101 nodes (3316 simplex iterations) in 0.13 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.800000000000e+01, best bound 4.800000000000e+01, gap 0.0%