Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:26 2012

Optimize a model with 414 rows, 123 columns and 828 nonzeros
Presolve removed 114 rows and 4 columns
Presolve time: 0.00s
Presolved: 300 rows, 119 columns, 660 nonzeros
Variable types: 0 continuous, 119 integer (119 binary)
Found heuristic solution: objective 42.0000000

Root relaxation: objective 5.150000e+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   51.50000    0   85   42.00000   51.50000  22.6%     -    0s
H    0     0                      45.0000000   51.50000  14.4%     -    0s
     0     0   50.00000    0  103   45.00000   50.00000  11.1%     -    0s
H    0     0                      46.0000000   50.00000  8.70%     -    0s
     0     0   49.50000    0  114   46.00000   49.50000  7.61%     -    0s
     0     0   49.00000    0  110   46.00000   49.00000  6.52%     -    0s
     0     0   48.85714    0  112   46.00000   48.85714  6.21%     -    0s
     0     0   48.78214    0  116   46.00000   48.78214  6.05%     -    0s
     0     0   48.63830    0  115   46.00000   48.63830  5.74%     -    0s
     0     0   48.50000    0  107   46.00000   48.50000  5.43%     -    0s
     0     0   48.48936    0  115   46.00000   48.48936  5.41%     -    0s
     0     0   48.48936    0  111   46.00000   48.48936  5.41%     -    0s
     0     2   48.48677    0  111   46.00000   48.48677  5.41%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 60

Explored 28 nodes (1589 simplex iterations) in 0.09 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%