Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:03 2012

Optimize a model with 461 rows, 135 columns and 922 nonzeros
Presolve removed 89 rows and 2 columns
Presolve time: 0.00s
Presolved: 372 rows, 133 columns, 794 nonzeros
Variable types: 0 continuous, 133 integer (133 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 5.687500e+01, 240 iterations, 0.00 seconds

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

     0     0   56.87500    0  127   43.00000   56.87500  32.3%     -    0s
H    0     0                      48.0000000   56.87500  18.5%     -    0s
     0     0   56.00000    0  130   48.00000   56.00000  16.7%     -    0s
     0     0   55.79487    0  131   48.00000   55.79487  16.2%     -    0s
     0     0   55.00000    0  100   48.00000   55.00000  14.6%     -    0s
     0     0   54.97059    0  132   48.00000   54.97059  14.5%     -    0s
     0     0   54.57738    0  133   48.00000   54.57738  13.7%     -    0s
     0     0   54.18175    0  131   48.00000   54.18175  12.9%     -    0s
     0     0   54.06037    0  132   48.00000   54.06037  12.6%     -    0s
     0     0   53.97838    0  132   48.00000   53.97838  12.5%     -    0s
     0     0   53.96416    0  133   48.00000   53.96416  12.4%     -    0s
     0     0   53.96416    0  132   48.00000   53.96416  12.4%     -    0s
     0     2   53.96271    0  132   48.00000   53.96271  12.4%     -    0s
*   48    16              10      49.0000000   53.54839  9.28%  31.7    0s

Cutting planes:
  Gomory: 1
  Zero half: 99

Explored 428 nodes (12372 simplex iterations) in 0.44 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%