Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:30 2012

Optimize a model with 367 rows, 125 columns and 734 nonzeros
Presolve removed 65 rows and 3 columns
Presolve time: 0.00s
Presolved: 302 rows, 122 columns, 631 nonzeros
Variable types: 0 continuous, 122 integer (122 binary)
Found heuristic solution: objective 47.0000000

Root relaxation: objective 5.550000e+01, 166 iterations, 0.00 seconds

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

     0     0   55.50000    0   87   47.00000   55.50000  18.1%     -    0s
     0     0   54.25000    0  101   47.00000   54.25000  15.4%     -    0s
H    0     0                      49.0000000   54.25000  10.7%     -    0s
     0     0   54.00000    0  111   49.00000   54.00000  10.2%     -    0s
     0     0   53.80000    0  118   49.00000   53.80000  9.80%     -    0s
     0     0   53.00000    0  109   49.00000   53.00000  8.16%     -    0s
     0     0   52.94286    0  121   49.00000   52.94286  8.05%     -    0s
     0     0   52.79680    0  119   49.00000   52.79680  7.75%     -    0s
     0     0   52.59414    0  120   49.00000   52.59414  7.33%     -    0s
     0     0   52.58373    0  120   49.00000   52.58373  7.31%     -    0s
     0     0   52.58373    0  120   49.00000   52.58373  7.31%     -    0s
H    0     0                      50.0000000   52.58373  5.17%     -    0s
     0     2   52.57895    0  120   50.00000   52.57895  5.16%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 48

Explored 37 nodes (1590 simplex iterations) in 0.08 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%