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

Optimize a model with 410 rows, 122 columns and 820 nonzeros
Presolve removed 76 rows and 2 columns
Presolve time: 0.00s
Presolved: 334 rows, 120 columns, 710 nonzeros
Variable types: 0 continuous, 120 integer (120 binary)
Found heuristic solution: objective 39.0000000

Root relaxation: objective 5.114286e+01, 203 iterations, 0.00 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0   51.14286    0  112   39.00000   51.14286  31.1%     -    0s
H    0     0                      43.0000000   51.14286  18.9%     -    0s
     0     0   50.26667    0  118   43.00000   50.26667  16.9%     -    0s
     0     0   49.60714    0  112   43.00000   49.60714  15.4%     -    0s
     0     0   49.21053    0  120   43.00000   49.21053  14.4%     -    0s
     0     0   48.98148    0  117   43.00000   48.98148  13.9%     -    0s
     0     0   48.69565    0  115   43.00000   48.69565  13.2%     -    0s
     0     0   48.50932    0  117   43.00000   48.50932  12.8%     -    0s
     0     0   48.40000    0  116   43.00000   48.40000  12.6%     -    0s
     0     0   48.39130    0  119   43.00000   48.39130  12.5%     -    0s
     0     0   48.39130    0  118   43.00000   48.39130  12.5%     -    0s
H    0     0                      45.0000000   48.39130  7.54%     -    0s
     0     2   48.39130    0  117   45.00000   48.39130  7.54%     -    0s
*   30     9               7      46.0000000   48.16667  4.71%  30.5    0s

Cutting planes:
  Zero half: 82

Explored 53 nodes (2143 simplex iterations) in 0.11 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%