Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:13 2012

Optimize a model with 281 rows, 108 columns and 562 nonzeros
Presolve removed 65 rows and 10 columns
Presolve time: 0.00s
Presolved: 216 rows, 98 columns, 453 nonzeros
Variable types: 0 continuous, 98 integer (98 binary)
Found heuristic solution: objective 42.0000000

Root relaxation: objective 4.950000e+01, 136 iterations, 0.00 seconds

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

     0     0   49.50000    0   77   42.00000   49.50000  17.9%     -    0s
H    0     0                      43.0000000   49.50000  15.1%     -    0s
     0     0   48.40000    0   90   43.00000   48.40000  12.6%     -    0s
H    0     0                      46.0000000   48.40000  5.22%     -    0s
H    0     0                      47.0000000   48.40000  2.98%     -    0s
     0     0   48.00000    0   68   47.00000   48.00000  2.13%     -    0s
     0     0   48.00000    0   44   47.00000   48.00000  2.13%     -    0s
     0     0   48.00000    0   82   47.00000   48.00000  2.13%     -    0s
     0     0   48.00000    0   62   47.00000   48.00000  2.13%     -    0s
     0     0     cutoff    0        47.00000   47.99995  2.13%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 28

Explored 0 nodes (376 simplex iterations) in 0.02 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%