Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:25 2012

Optimize a model with 351 rows, 121 columns and 702 nonzeros
Presolve removed 70 rows and 4 columns
Presolve time: 0.00s
Presolved: 281 rows, 117 columns, 596 nonzeros
Variable types: 0 continuous, 117 integer (117 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 5.233333e+01, 187 iterations, 0.00 seconds

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

     0     0   52.33333    0  105   43.00000   52.33333  21.7%     -    0s
     0     0   51.00000    0  100   43.00000   51.00000  18.6%     -    0s
     0     0   50.64706    0  111   43.00000   50.64706  17.8%     -    0s
     0     0   50.22222    0  104   43.00000   50.22222  16.8%     -    0s
H    0     0                      45.0000000   50.22222  11.6%     -    0s
     0     0   49.88398    0  111   45.00000   49.88398  10.9%     -    0s
H    0     0                      46.0000000   49.88398  8.44%     -    0s
     0     0   49.66667    0  108   46.00000   49.66667  7.97%     -    0s
     0     0   49.66234    0  109   46.00000   49.66234  7.96%     -    0s
     0     0   49.66234    0  106   46.00000   49.66234  7.96%     -    0s
     0     2   49.65833    0  105   46.00000   49.65833  7.95%     -    0s
*   54    11              16      47.0000000   49.50000  5.32%  16.0    0s

Cutting planes:
  Gomory: 1
  Zero half: 62

Explored 76 nodes (1977 simplex iterations) in 0.08 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.700000000000e+01, best bound 4.700000000000e+01, gap 0.0%