Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:39 2012

Optimize a model with 419 rows, 130 columns and 838 nonzeros
Presolve removed 79 rows and 4 columns
Presolve time: 0.00s
Presolved: 340 rows, 126 columns, 720 nonzeros
Variable types: 0 continuous, 126 integer (126 binary)
Found heuristic solution: objective 47.0000000

Root relaxation: objective 5.650000e+01, 211 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   97   47.00000   56.50000  20.2%     -    0s
     0     0   55.53333    0  119   47.00000   55.53333  18.2%     -    0s
H    0     0                      48.0000000   55.53333  15.7%     -    0s
     0     0   55.23780    0  121   48.00000   55.23780  15.1%     -    0s
     0     0   54.44000    0  123   48.00000   54.44000  13.4%     -    0s
     0     0   53.86364    0  123   48.00000   53.86364  12.2%     -    0s
     0     0   53.46341    0  118   48.00000   53.46341  11.4%     -    0s
     0     0   53.35486    0  123   48.00000   53.35486  11.2%     -    0s
     0     0   53.13503    0  121   48.00000   53.13503  10.7%     -    0s
     0     0   53.01151    0  121   48.00000   53.01151  10.4%     -    0s
     0     0   52.95224    0  123   48.00000   52.95224  10.3%     -    0s
     0     0   52.93547    0  126   48.00000   52.93547  10.3%     -    0s
     0     0   52.93547    0  125   48.00000   52.93547  10.3%     -    0s
H    0     0                      50.0000000   52.93547  5.87%     -    0s
     0     2   52.93433    0  125   50.00000   52.93433  5.87%     -    0s

Cutting planes:
  Zero half: 80

Explored 47 nodes (2589 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%