Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:40 2012

Optimize a model with 167 rows, 58 columns and 334 nonzeros
Presolve removed 45 rows and 0 columns
Presolve time: 0.00s
Presolved: 122 rows, 58 columns, 277 nonzeros
Variable types: 0 continuous, 58 integer (58 binary)
Found heuristic solution: objective 21.0000000

Root relaxation: objective 2.433333e+01, 81 iterations, 0.00 seconds

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

     0     0   24.33333    0   48   21.00000   24.33333  15.9%     -    0s
H    0     0                      23.0000000   24.33333  5.80%     -    0s
     0     0 infeasible    0        23.00000   23.99998  4.35%     -    0s

Cutting planes:
  Zero half: 22

Explored 0 nodes (130 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.300000000000e+01, best bound 2.300000000000e+01, gap 0.0%