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

Optimize a model with 279 rows, 106 columns and 558 nonzeros
Presolve removed 90 rows and 15 columns
Presolve time: 0.00s
Presolved: 189 rows, 91 columns, 394 nonzeros
Variable types: 0 continuous, 91 integer (91 binary)
Found heuristic solution: objective 46.0000000

Root relaxation: objective 4.800000e+01, 118 iterations, 0.00 seconds

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

     0     0   48.00000    0   39   46.00000   48.00000  4.35%     -    0s
H    0     0                      47.0000000   48.00000  2.13%     -    0s
     0     0   48.00000    0   74   47.00000   48.00000  2.13%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 6

Explored 0 nodes (188 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%