Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:45 2012

Optimize a model with 234 rows, 72 columns and 468 nonzeros
Presolve removed 64 rows and 4 columns
Presolve time: 0.00s
Presolved: 170 rows, 68 columns, 371 nonzeros
Variable types: 0 continuous, 68 integer (68 binary)
Found heuristic solution: objective 25.0000000

Root relaxation: objective 3.050000e+01, 106 iterations, 0.00 seconds

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

     0     0   30.50000    0   57   25.00000   30.50000  22.0%     -    0s
H    0     0                      26.0000000   30.50000  17.3%     -    0s
     0     0   30.00000    0   50   26.00000   30.00000  15.4%     -    0s
H    0     0                      27.0000000   30.00000  11.1%     -    0s
     0     0   29.89189    0   68   27.00000   29.89189  10.7%     -    0s
     0     0   29.26667    0   67   27.00000   29.26667  8.40%     -    0s
     0     0   29.07256    0   68   27.00000   29.07256  7.68%     -    0s
     0     0   28.91986    0   68   27.00000   28.91986  7.11%     -    0s
     0     0   28.74888    0   67   27.00000   28.74888  6.48%     -    0s
     0     0   28.68033    0   68   27.00000   28.68033  6.22%     -    0s
     0     0   28.68000    0   68   27.00000   28.68000  6.22%     -    0s
     0     0   28.68000    0   68   27.00000   28.68000  6.22%     -    0s
     0     2   28.68000    0   68   27.00000   28.68000  6.22%     -    0s

Cutting planes:
  Zero half: 29

Explored 7 nodes (462 simplex iterations) in 0.03 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.700000000000e+01, best bound 2.700000000000e+01, gap 0.0%