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

Optimize a model with 287 rows, 111 columns and 574 nonzeros
Presolve removed 59 rows and 8 columns
Presolve time: 0.00s
Presolved: 228 rows, 103 columns, 478 nonzeros
Variable types: 0 continuous, 103 integer (103 binary)
Found heuristic solution: objective 44.0000000

Root relaxation: objective 5.066667e+01, 142 iterations, 0.00 seconds

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

     0     0   50.66667    0   75   44.00000   50.66667  15.2%     -    0s
H    0     0                      49.0000000   50.66667  3.40%     -    0s
     0     0   50.00000    0   80   49.00000   50.00000  2.04%     -    0s
     0     0     cutoff    0        49.00000   49.99995  2.04%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 50

Explored 0 nodes (229 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.900000000000e+01, best bound 4.900000000000e+01, gap 0.0%