Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:35 2012

Optimize a model with 388 rows, 128 columns and 776 nonzeros
Presolve removed 98 rows and 8 columns
Presolve time: 0.00s
Presolved: 290 rows, 120 columns, 610 nonzeros
Variable types: 0 continuous, 120 integer (120 binary)
Found heuristic solution: objective 47.0000000

Root relaxation: objective 5.700000e+01, 161 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  102   47.00000   57.00000  21.3%     -    0s
     0     0   54.87500    0  113   47.00000   54.87500  16.8%     -    0s
     0     0   54.14815    0  116   47.00000   54.14815  15.2%     -    0s
H    0     0                      50.0000000   54.14815  8.30%     -    0s
     0     0   53.52941    0  118   50.00000   53.52941  7.06%     -    0s
     0     0   53.44037    0  116   50.00000   53.44037  6.88%     -    0s
     0     0   53.26636    0  119   50.00000   53.26636  6.53%     -    0s
     0     0   53.02793    0  117   50.00000   53.02793  6.06%     -    0s
     0     0   52.92985    0  117   50.00000   52.92985  5.86%     -    0s
     0     0   52.89334    0  119   50.00000   52.89334  5.79%     -    0s
     0     0   52.89334    0  119   50.00000   52.89334  5.79%     -    0s
     0     2   52.88256    0  119   50.00000   52.88256  5.77%     -    0s
*   16     4               4      51.0000000   52.67337  3.28%  31.4    0s

Cutting planes:
  Gomory: 2
  Zero half: 49

Explored 29 nodes (1433 simplex iterations) in 0.08 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%