Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:37 2012

Optimize a model with 415 rows, 129 columns and 830 nonzeros
Presolve removed 97 rows and 7 columns
Presolve time: 0.00s
Presolved: 318 rows, 122 columns, 676 nonzeros
Variable types: 0 continuous, 122 integer (122 binary)
Found heuristic solution: objective 42.0000000

Root relaxation: objective 5.550000e+01, 195 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   99   42.00000   55.50000  32.1%     -    0s
H    0     0                      44.0000000   55.50000  26.1%     -    0s
     0     0   54.39130    0  120   44.00000   54.39130  23.6%     -    0s
     0     0   53.37736    0  120   44.00000   53.37736  21.3%     -    0s
     0     0   52.52941    0  117   44.00000   52.52941  19.4%     -    0s
H    0     0                      45.0000000   52.52941  16.7%     -    0s
     0     0   52.35165    0  118   45.00000   52.35165  16.3%     -    0s
H    0     0                      46.0000000   52.35165  13.8%     -    0s
     0     0   52.00000    0  116   46.00000   52.00000  13.0%     -    0s
H    0     0                      47.0000000   52.00000  10.6%     -    0s
     0     0   52.00000    0  120   47.00000   52.00000  10.6%     -    0s
     0     0   52.00000    0  103   47.00000   52.00000  10.6%     -    0s
H    0     0                      48.0000000   52.00000  8.33%     -    0s
     0     2   52.00000    0  103   48.00000   52.00000  8.33%     -    0s
H   75    15                      49.0000000   50.86486  3.81%  26.9    0s

Cutting planes:
  Gomory: 1
  Zero half: 65

Explored 106 nodes (3859 simplex iterations) in 0.14 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.900000000000e+01, best bound 4.900000000000e+01, gap 0.0%