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

Optimize a model with 323 rows, 83 columns and 646 nonzeros
Presolve removed 99 rows and 0 columns
Presolve time: 0.00s
Presolved: 224 rows, 83 columns, 532 nonzeros
Variable types: 0 continuous, 83 integer (83 binary)
Found heuristic solution: objective 26.0000000

Root relaxation: objective 3.215385e+01, 137 iterations, 0.00 seconds

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

     0     0   32.15385    0   79   26.00000   32.15385  23.7%     -    0s
H    0     0                      28.0000000   32.15385  14.8%     -    0s
     0     0   31.48778    0   79   28.00000   31.48778  12.5%     -    0s
     0     0   31.31175    0   79   28.00000   31.31175  11.8%     -    0s
     0     0   31.13640    0   81   28.00000   31.13640  11.2%     -    0s
     0     0   30.97747    0   81   28.00000   30.97747  10.6%     -    0s
     0     0   30.82353    0   81   28.00000   30.82353  10.1%     -    0s
     0     0   30.70149    0   82   28.00000   30.70149  9.65%     -    0s
     0     0   30.58589    0   83   28.00000   30.58589  9.24%     -    0s
     0     0   30.46720    0   83   28.00000   30.46720  8.81%     -    0s
     0     0   30.46719    0   83   28.00000   30.46719  8.81%     -    0s
     0     0   30.46719    0   80   28.00000   30.46719  8.81%     -    0s
     0     2   30.46545    0   80   28.00000   30.46545  8.81%     -    0s

Cutting planes:
  Zero half: 37

Explored 44 nodes (1483 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%