Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:15 2012

Optimize a model with 278 rows, 110 columns and 556 nonzeros
Presolve removed 57 rows and 8 columns
Presolve time: 0.00s
Presolved: 221 rows, 102 columns, 462 nonzeros
Variable types: 0 continuous, 102 integer (102 binary)
Found heuristic solution: objective 42.0000000

Root relaxation: objective 5.033333e+01, 162 iterations, 0.00 seconds

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

     0     0   50.33333    0   93   42.00000   50.33333  19.8%     -    0s
H    0     0                      46.0000000   50.33333  9.42%     -    0s
H    0     0                      47.0000000   50.33333  7.09%     -    0s
     0     0   49.50000    0   96   47.00000   49.50000  5.32%     -    0s
     0     0   48.77778    0   96   47.00000   48.77778  3.78%     -    0s
     0     0   48.50000    0   63   47.00000   48.50000  3.19%     -    0s
     0     0   48.31579    0   95   47.00000   48.31579  2.80%     -    0s
     0     0   48.27239    0   98   47.00000   48.27239  2.71%     -    0s
     0     0   48.12865    0   98   47.00000   48.12865  2.40%     -    0s
     0     0     cutoff    0        47.00000   47.99995  2.13%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 50

Explored 0 nodes (409 simplex iterations) in 0.03 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%