Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:11 2012

Optimize a model with 258 rows, 105 columns and 516 nonzeros
Presolve removed 96 rows and 22 columns
Presolve time: 0.00s
Presolved: 162 rows, 83 columns, 338 nonzeros
Variable types: 0 continuous, 83 integer (83 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 4.825000e+01, 129 iterations, 0.00 seconds

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

     0     0   48.25000    0   74   43.00000   48.25000  12.2%     -    0s
H    0     0                      45.0000000   48.25000  7.22%     -    0s
     0     0   48.00000    0   80   45.00000   48.00000  6.67%     -    0s
H    0     0                      46.0000000   48.00000  4.35%     -    0s
H    0     0                      47.0000000   48.00000  2.13%     -    0s
     0     0     cutoff    0        47.00000   47.99995  2.13%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 67

Explored 0 nodes (192 simplex iterations) in 0.01 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%