Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:56 2012

Optimize a model with 391 rows, 88 columns and 782 nonzeros
Presolve removed 131 rows and 0 columns
Presolve time: 0.00s
Presolved: 260 rows, 88 columns, 634 nonzeros
Variable types: 0 continuous, 88 integer (88 binary)
Found heuristic solution: objective 25.0000000

Root relaxation: objective 3.273684e+01, 169 iterations, 0.00 seconds

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

     0     0   32.73684    0   82   25.00000   32.73684  30.9%     -    0s
H    0     0                      26.0000000   32.73684  25.9%     -    0s
     0     0   32.26667    0   85   26.00000   32.26667  24.1%     -    0s
H    0     0                      27.0000000   32.26667  19.5%     -    0s
     0     0   31.83750    0   87   27.00000   31.83750  17.9%     -    0s
     0     0   31.58748    0   86   27.00000   31.58748  17.0%     -    0s
     0     0   31.50250    0   85   27.00000   31.50250  16.7%     -    0s
     0     0   31.42188    0   87   27.00000   31.42188  16.4%     -    0s
     0     0   31.38837    0   88   27.00000   31.38837  16.3%     -    0s
H    0     0                      28.0000000   31.38837  12.1%     -    0s
     0     0   31.36032    0   88   28.00000   31.36032  12.0%     -    0s
     0     0   31.33273    0   88   28.00000   31.33273  11.9%     -    0s
     0     0   31.31924    0   87   28.00000   31.31924  11.9%     -    0s
     0     0   31.31616    0   88   28.00000   31.31616  11.8%     -    0s
     0     0   31.31616    0   88   28.00000   31.31616  11.8%     -    0s
     0     2   31.31156    0   88   28.00000   31.31156  11.8%     -    0s

Cutting planes:
  Zero half: 41

Explored 106 nodes (2923 simplex iterations) in 0.13 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%