Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:55 2012

Optimize a model with 498 rows, 135 columns and 996 nonzeros
Presolve removed 90 rows and 0 columns
Presolve time: 0.00s
Presolved: 408 rows, 135 columns, 876 nonzeros
Variable types: 0 continuous, 135 integer (135 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 5.600000e+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   56.00000    0  106   43.00000   56.00000  30.2%     -    0s
     0     0   54.72727    0  130   43.00000   54.72727  27.3%     -    0s
     0     0   53.82908    0  128   43.00000   53.82908  25.2%     -    0s
     0     0   53.24909    0  130   43.00000   53.24909  23.8%     -    0s
     0     0   52.71014    0  131   43.00000   52.71014  22.6%     -    0s
     0     0   52.40103    0  132   43.00000   52.40103  21.9%     -    0s
     0     0   52.21519    0  132   43.00000   52.21519  21.4%     -    0s
     0     0   52.06486    0  134   43.00000   52.06486  21.1%     -    0s
     0     0   52.04195    0  134   43.00000   52.04195  21.0%     -    0s
     0     0   52.04195    0  134   43.00000   52.04195  21.0%     -    0s
     0     2   52.04180    0  134   43.00000   52.04180  21.0%     -    0s
H   11    11                      45.0000000   51.85786  15.2%  46.5    0s
H  393   124                      46.0000000   50.04348  8.79%  28.4    0s
   615   169   47.50000    7  133   46.00000   49.66667  7.97%  26.0    5s

Cutting planes:
  Gomory: 5
  Zero half: 180

Explored 2281 nodes (58781 simplex iterations) in 7.79 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.600000000000e+01, best bound 4.600000000000e+01, gap 0.0%