Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:02 2012

Optimize a model with 143 rows, 72 columns and 286 nonzeros
Presolve removed 32 rows and 9 columns
Presolve time: 0.00s
Presolved: 111 rows, 63 columns, 228 nonzeros
Variable types: 0 continuous, 63 integer (63 binary)
Found heuristic solution: objective 30.0000000

Root relaxation: objective 3.300000e+01, 74 iterations, 0.00 seconds

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

     0     0   33.00000    0   44   30.00000   33.00000  10.0%     -    0s
H    0     0                      31.0000000   33.00000  6.45%     -    0s
     0     0   32.50000    0   43   31.00000   32.50000  4.84%     -    0s
H    0     0                      32.0000000   32.50000  1.56%     -    0s

Cutting planes:
  Gomory: 1
  Zero half: 3

Explored 0 nodes (144 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%