Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:36 2012

Optimize a model with 409 rows, 128 columns and 818 nonzeros
Presolve removed 59 rows and 1 columns
Presolve time: 0.00s
Presolved: 350 rows, 127 columns, 735 nonzeros
Variable types: 0 continuous, 127 integer (127 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 5.650000e+01, 175 iterations, 0.00 seconds

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

     0     0   56.50000    0  101   43.00000   56.50000  31.4%     -    0s
H    0     0                      44.0000000   56.50000  28.4%     -    0s
     0     0   55.25000    0  116   44.00000   55.25000  25.6%     -    0s
H    0     0                      47.0000000   55.25000  17.6%     -    0s
     0     0   54.50000    0  107   47.00000   54.50000  16.0%     -    0s
H    0     0                      48.0000000   54.50000  13.5%     -    0s
     0     0   54.33333    0  117   48.00000   54.33333  13.2%     -    0s
     0     0   53.84853    0  126   48.00000   53.84853  12.2%     -    0s
     0     0   53.60000    0  122   48.00000   53.60000  11.7%     -    0s
     0     0   53.35101    0  121   48.00000   53.35101  11.1%     -    0s
     0     0   53.13889    0  125   48.00000   53.13889  10.7%     -    0s
     0     0   53.12378    0  126   48.00000   53.12378  10.7%     -    0s
     0     0   53.12378    0  124   48.00000   53.12378  10.7%     -    0s
     0     2   53.12378    0  123   48.00000   53.12378  10.7%     -    0s
H   10    10                      50.0000000   53.10072  6.20%  44.2    0s

Cutting planes:
  Zero half: 91

Explored 64 nodes (2839 simplex iterations) in 0.13 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0%