Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:49 2012

Optimize a model with 412 rows, 133 columns and 824 nonzeros
Presolve removed 103 rows and 8 columns
Presolve time: 0.00s
Presolved: 309 rows, 125 columns, 666 nonzeros
Variable types: 0 continuous, 125 integer (125 binary)
Found heuristic solution: objective 47.0000000

Root relaxation: objective 5.700000e+01, 155 iterations, 0.00 seconds

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

     0     0   57.00000    0   98   47.00000   57.00000  21.3%     -    0s
H    0     0                      48.0000000   57.00000  18.8%     -    0s
     0     0   56.30952    0  123   48.00000   56.30952  17.3%     -    0s
H    0     0                      51.0000000   56.30952  10.4%     -    0s
     0     0   55.50000    0   97   51.00000   55.50000  8.82%     -    0s
     0     0   55.42857    0  119   51.00000   55.42857  8.68%     -    0s
     0     0   55.12500    0  115   51.00000   55.12500  8.09%     -    0s
     0     0   54.94595    0  124   51.00000   54.94595  7.74%     -    0s
     0     0   54.59649    0  123   51.00000   54.59649  7.05%     -    0s
     0     0   54.43913    0  123   51.00000   54.43913  6.74%     -    0s
     0     0   54.33535    0  124   51.00000   54.33535  6.54%     -    0s
     0     0   54.06615    0  124   51.00000   54.06615  6.01%     -    0s
     0     0   54.03432    0  124   51.00000   54.03432  5.95%     -    0s
     0     0   54.03432    0  123   51.00000   54.03432  5.95%     -    0s
     0     2   54.03432    0  123   51.00000   54.03432  5.95%     -    0s
*   41     4               4      52.0000000   53.32264  2.54%  27.1    0s

Cutting planes:
  Zero half: 64

Explored 46 nodes (2064 simplex iterations) in 0.11 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.200000000000e+01, best bound 5.200000000000e+01, gap 0.0%