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

Optimize a model with 244 rows, 74 columns and 488 nonzeros
Presolve removed 70 rows and 2 columns
Presolve time: 0.00s
Presolved: 174 rows, 72 columns, 386 nonzeros
Variable types: 0 continuous, 72 integer (72 binary)
Found heuristic solution: objective 27.0000000

Root relaxation: objective 3.000000e+01, 102 iterations, 0.00 seconds

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

     0     0   30.00000    0   46   27.00000   30.00000  11.1%     -    0s
     0     0   29.53846    0   69   27.00000   29.53846  9.40%     -    0s
     0     0   29.35294    0   70   27.00000   29.35294  8.71%     -    0s
     0     0   29.16667    0   70   27.00000   29.16667  8.02%     -    0s
     0     0   29.04348    0   70   27.00000   29.04348  7.57%     -    0s
     0     0   28.86667    0   71   27.00000   28.86667  6.91%     -    0s
     0     0   28.78313    0   70   27.00000   28.78313  6.60%     -    0s
     0     0   28.74434    0   71   27.00000   28.74434  6.46%     -    0s
     0     0   28.70896    0   71   27.00000   28.70896  6.33%     -    0s
     0     0   28.70573    0   71   27.00000   28.70573  6.32%     -    0s
     0     0   28.70573    0   71   27.00000   28.70573  6.32%     -    0s
     0     2   28.70573    0   70   27.00000   28.70573  6.32%     -    0s

Cutting planes:
  Zero half: 23

Explored 8 nodes (508 simplex iterations) in 0.04 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%