Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:51 2012

Optimize a model with 353 rows, 83 columns and 706 nonzeros
Presolve removed 112 rows and 0 columns
Presolve time: 0.00s
Presolved: 241 rows, 83 columns, 568 nonzeros
Variable types: 0 continuous, 83 integer (83 binary)
Found heuristic solution: objective 25.0000000

Root relaxation: objective 3.235849e+01, 141 iterations, 0.00 seconds

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

     0     0   32.35849    0   82   25.00000   32.35849  29.4%     -    0s
H    0     0                      26.0000000   32.35849  24.5%     -    0s
     0     0   31.61621    0   83   26.00000   31.61621  21.6%     -    0s
     0     0   31.43428    0   83   26.00000   31.43428  20.9%     -    0s
H    0     0                      27.0000000   31.43428  16.4%     -    0s
     0     0   31.22505    0   81   27.00000   31.22505  15.6%     -    0s
     0     0   31.08956    0   83   27.00000   31.08956  15.1%     -    0s
     0     0   30.98272    0   83   27.00000   30.98272  14.8%     -    0s
     0     0   30.96897    0   83   27.00000   30.96897  14.7%     -    0s
     0     0   30.96897    0   83   27.00000   30.96897  14.7%     -    0s
     0     2   30.96789    0   82   27.00000   30.96789  14.7%     -    0s
H    7     4                      28.0000000   30.67049  9.54%  26.9    0s

Cutting planes:
  Clique: 1
  Zero half: 34

Explored 44 nodes (1389 simplex iterations) in 0.08 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%