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

Optimize a model with 283 rows, 111 columns and 566 nonzeros
Presolve removed 57 rows and 10 columns
Presolve time: 0.00s
Presolved: 226 rows, 101 columns, 470 nonzeros
Variable types: 0 continuous, 101 integer (101 binary)
Found heuristic solution: objective 44.0000000

Root relaxation: objective 5.050000e+01, 141 iterations, 0.00 seconds

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

     0     0   50.50000    0   81   44.00000   50.50000  14.8%     -    0s
     0     0   50.00000    0   80   44.00000   50.00000  13.6%     -    0s
     0     0   49.63636    0   98   44.00000   49.63636  12.8%     -    0s
H    0     0                      46.0000000   49.63636  7.91%     -    0s
H    0     0                      47.0000000   49.63636  5.61%     -    0s
     0     0   48.75000    0   95   47.00000   48.75000  3.72%     -    0s
     0     0   48.40000    0   93   47.00000   48.40000  2.98%     -    0s
     0     0   48.27273    0   91   47.00000   48.27273  2.71%     -    0s
     0     0   48.02703    0   96   47.00000   48.02703  2.19%     -    0s
     0     0     cutoff    0        47.00000   47.99995  2.13%     -    0s

Cutting planes:
  Zero half: 52

Explored 0 nodes (534 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%