Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:50 2012

Optimize a model with 442 rows, 133 columns and 884 nonzeros
Presolve removed 86 rows and 2 columns
Presolve time: 0.00s
Presolved: 356 rows, 131 columns, 755 nonzeros
Variable types: 0 continuous, 131 integer (131 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 5.520000e+01, 202 iterations, 0.00 seconds

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

     0     0   55.20000    0  123   43.00000   55.20000  28.4%     -    0s
H    0     0                      47.0000000   55.20000  17.4%     -    0s
     0     0   54.83333    0  122   47.00000   54.83333  16.7%     -    0s
     0     0   54.35000    0  130   47.00000   54.35000  15.6%     -    0s
     0     0   53.66667    0  125   47.00000   53.66667  14.2%     -    0s
     0     0   53.44828    0  126   47.00000   53.44828  13.7%     -    0s
     0     0   53.27165    0  130   47.00000   53.27165  13.3%     -    0s
     0     0   53.15707    0  131   47.00000   53.15707  13.1%     -    0s
     0     0   53.00248    0  129   47.00000   53.00248  12.8%     -    0s
     0     0   52.93694    0  131   47.00000   52.93694  12.6%     -    0s
     0     0   52.92081    0  131   47.00000   52.92081  12.6%     -    0s
     0     0   52.92081    0  129   47.00000   52.92081  12.6%     -    0s
H    0     0                      48.0000000   52.92081  10.3%     -    0s
     0     2   52.92081    0  129   48.00000   52.92081  10.3%     -    0s
*   84    18               7      49.0000000   52.40625  6.95%  26.1    0s

Cutting planes:
  Zero half: 80

Explored 221 nodes (6632 simplex iterations) in 0.25 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.900000000000e+01, best bound 4.900000000000e+01, gap 0.0%