Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:03 2012

Optimize a model with 173 rows, 79 columns and 346 nonzeros
Presolve removed 53 rows and 12 columns
Presolve time: 0.00s
Presolved: 120 rows, 67 columns, 251 nonzeros
Variable types: 0 continuous, 67 integer (67 binary)
Found heuristic solution: objective 34.0000000

Root relaxation: objective 3.716667e+01, 84 iterations, 0.00 seconds

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

     0     0   37.16667    0   59   34.00000   37.16667  9.31%     -    0s
H    0     0                      35.0000000   37.16667  6.19%     -    0s
H    0     0                      36.0000000   37.16667  3.24%     -    0s

Cutting planes:
  Zero half: 2

Explored 0 nodes (107 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.600000000000e+01, best bound 3.700000000000e+01, gap 2.7778%