Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:24 2012

Optimize a model with 376 rows, 121 columns and 752 nonzeros
Presolve removed 83 rows and 4 columns
Presolve time: 0.00s
Presolved: 293 rows, 117 columns, 624 nonzeros
Variable types: 0 continuous, 117 integer (117 binary)
Found heuristic solution: objective 47.0000000

Root relaxation: objective 5.291026e+01, 216 iterations, 0.00 seconds

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

     0     0   52.91026    0  103   47.00000   52.91026  12.6%     -    0s
H    0     0                      48.0000000   52.91026  10.2%     -    0s
     0     0   51.78100    0  115   48.00000   51.78100  7.88%     -    0s
     0     0   51.25841    0  114   48.00000   51.25841  6.79%     -    0s
     0     0   51.01282    0  108   48.00000   51.01282  6.28%     -    0s
     0     0   50.74419    0  117   48.00000   50.74419  5.72%     -    0s
     0     0   50.66626    0  117   48.00000   50.66626  5.55%     -    0s
     0     0   50.50920    0  117   48.00000   50.50920  5.23%     -    0s
     0     0   50.36261    0  116   48.00000   50.36261  4.92%     -    0s
     0     0   50.29571    0  116   48.00000   50.29571  4.78%     -    0s
     0     0   50.22657    0  110   48.00000   50.22657  4.64%     -    0s
     0     0   50.20475    0  109   48.00000   50.20475  4.59%     -    0s
     0     0   50.20475    0  109   48.00000   50.20475  4.59%     -    0s
     0     0   50.20475    0  108   48.00000   50.20475  4.59%     -    0s
     0     2   50.20186    0  107   48.00000   50.20186  4.59%     -    0s
H   18     2                      49.0000000   49.73077  1.49%  22.4    0s

Cutting planes:
  Zero half: 58

Explored 18 nodes (1145 simplex iterations) in 0.08 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%