Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:04 2012

Optimize a model with 467 rows, 93 columns and 934 nonzeros
Presolve removed 190 rows and 0 columns
Presolve time: 0.00s
Presolved: 277 rows, 93 columns, 707 nonzeros
Variable types: 0 continuous, 93 integer (93 binary)
Found heuristic solution: objective 22.0000000

Root relaxation: objective 3.182261e+01, 201 iterations, 0.00 seconds

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

     0     0   31.82261    0   89   22.00000   31.82261  44.6%     -    0s
     0     0   31.39161    0   88   22.00000   31.39161  42.7%     -    0s
H    0     0                      23.0000000   31.39161  36.5%     -    0s
     0     0   31.19312    0   90   23.00000   31.19312  35.6%     -    0s
H    0     0                      24.0000000   31.19312  30.0%     -    0s
     0     0   31.04661    0   89   24.00000   31.04661  29.4%     -    0s
H    0     0                      26.0000000   31.04661  19.4%     -    0s
     0     0   30.87510    0   89   26.00000   30.87510  18.8%     -    0s
     0     0   30.72082    0   88   26.00000   30.72082  18.2%     -    0s
     0     0   30.71870    0   90   26.00000   30.71870  18.1%     -    0s
     0     0   30.71870    0   90   26.00000   30.71870  18.1%     -    0s
     0     2   30.71855    0   90   26.00000   30.71855  18.1%     -    0s
*  192    23               9      27.0000000   28.98333  7.35%  19.8    0s
H  195     0                      28.0000000   28.98333  3.51%  19.5    0s

Cutting planes:
  Clique: 3
  Zero half: 29

Explored 195 nodes (4324 simplex iterations) in 0.16 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.800000000000e+01, best bound 2.800000000000e+01, gap 0.0%