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

Optimize a model with 438 rows, 129 columns and 876 nonzeros
Presolve removed 95 rows and 5 columns
Presolve time: 0.00s
Presolved: 343 rows, 124 columns, 738 nonzeros
Variable types: 0 continuous, 124 integer (124 binary)
Found heuristic solution: objective 45.0000000

Root relaxation: objective 5.600000e+01, 174 iterations, 0.00 seconds

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

     0     0   56.00000    0   90   45.00000   56.00000  24.4%     -    0s
     0     0   54.66667    0  118   45.00000   54.66667  21.5%     -    0s
H    0     0                      46.0000000   54.66667  18.8%     -    0s
H    0     0                      47.0000000   54.66667  16.3%     -    0s
     0     0   53.60000    0  114   47.00000   53.60000  14.0%     -    0s
     0     0   53.24082    0  120   47.00000   53.24082  13.3%     -    0s
H    0     0                      48.0000000   53.24082  10.9%     -    0s
     0     0   53.07735    0  121   48.00000   53.07735  10.6%     -    0s
     0     0   52.91649    0  119   48.00000   52.91649  10.2%     -    0s
     0     0   52.54601    0  121   48.00000   52.54601  9.47%     -    0s
     0     0   52.40590    0  121   48.00000   52.40590  9.18%     -    0s
     0     0   52.38270    0  122   48.00000   52.38270  9.13%     -    0s
     0     0   52.38270    0  122   48.00000   52.38270  9.13%     -    0s
     0     2   52.37434    0  122   48.00000   52.37434  9.11%     -    0s
*   32    10               5      49.0000000   52.08355  6.29%  26.7    0s
H   55     5                      50.0000000   51.50000  3.00%  26.4    0s

Cutting planes:
  Gomory: 3
  Zero half: 78

Explored 66 nodes (2537 simplex iterations) in 0.12 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%