Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:25 2012

Optimize a model with 409 rows, 122 columns and 818 nonzeros
Presolve removed 84 rows and 2 columns
Presolve time: 0.00s
Presolved: 325 rows, 120 columns, 702 nonzeros
Variable types: 0 continuous, 120 integer (120 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 5.150000e+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   51.50000    0  103   43.00000   51.50000  19.8%     -    0s
     0     0   51.00000    0  101   43.00000   51.00000  18.6%     -    0s
H    0     0                      44.0000000   51.00000  15.9%     -    0s
     0     0   50.36364    0  117   44.00000   50.36364  14.5%     -    0s
H    0     0                      46.0000000   50.36364  9.49%     -    0s
     0     0   49.88000    0  114   46.00000   49.88000  8.43%     -    0s
     0     0   49.38816    0  115   46.00000   49.38816  7.37%     -    0s
     0     0   49.22619    0  117   46.00000   49.22619  7.01%     -    0s
     0     0   48.96217    0  117   46.00000   48.96217  6.44%     -    0s
     0     0   48.95379    0  118   46.00000   48.95379  6.42%     -    0s
     0     0   48.95379    0  117   46.00000   48.95379  6.42%     -    0s
     0     2   48.94729    0  117   46.00000   48.94729  6.41%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 63

Explored 62 nodes (2280 simplex iterations) in 0.10 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%