Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:14 2012

Optimize a model with 279 rows, 109 columns and 558 nonzeros
Presolve removed 56 rows and 4 columns
Presolve time: 0.00s
Presolved: 223 rows, 105 columns, 474 nonzeros
Variable types: 0 continuous, 105 integer (105 binary)
Found heuristic solution: objective 43.0000000

Root relaxation: objective 5.000000e+01, 137 iterations, 0.00 seconds

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

     0     0   50.00000    0   78   43.00000   50.00000  16.3%     -    0s
     0     0   49.33333    0   93   43.00000   49.33333  14.7%     -    0s
H    0     0                      47.0000000   49.33333  4.96%     -    0s
     0     0   48.75000    0   86   47.00000   48.75000  3.72%     -    0s
H    0     0                      48.0000000   48.75000  1.56%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 9

Explored 0 nodes (340 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.800000000000e+01, best bound 4.800000000000e+01, gap 0.0%