Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:49 2012

Optimize a model with 309 rows, 80 columns and 618 nonzeros
Presolve removed 96 rows and 2 columns
Presolve time: 0.00s
Presolved: 213 rows, 78 columns, 486 nonzeros
Variable types: 0 continuous, 78 integer (78 binary)
Found heuristic solution: objective 27.0000000

Root relaxation: objective 3.234783e+01, 118 iterations, 0.00 seconds

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

     0     0   32.34783    0   72   27.00000   32.34783  19.8%     -    0s
H    0     0                      28.0000000   32.34783  15.5%     -    0s
     0     0   31.60000    0   70   28.00000   31.60000  12.9%     -    0s
     0     0   31.14286    0   73   28.00000   31.14286  11.2%     -    0s
     0     0   30.85714    0   69   28.00000   30.85714  10.2%     -    0s
     0     0   30.74224    0   77   28.00000   30.74224  9.79%     -    0s
     0     0   30.67949    0   76   28.00000   30.67949  9.57%     -    0s
     0     0   30.67949    0   77   28.00000   30.67949  9.57%     -    0s
     0     0   30.67949    0   73   28.00000   30.67949  9.57%     -    0s
     0     2   30.66667    0   73   28.00000   30.66667  9.52%     -    0s

Cutting planes:
  Clique: 1
  Zero half: 32

Explored 31 nodes (967 simplex iterations) in 0.05 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%