Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:47 2012

Optimize a model with 301 rows, 77 columns and 602 nonzeros
Presolve removed 95 rows and 0 columns
Presolve time: 0.00s
Presolved: 206 rows, 77 columns, 488 nonzeros
Variable types: 0 continuous, 77 integer (77 binary)
Found heuristic solution: objective 25.0000000

Root relaxation: objective 3.050000e+01, 139 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   71   25.00000   30.50000  22.0%     -    0s
H    0     0                      27.0000000   30.50000  13.0%     -    0s
     0     0   30.03378    0   73   27.00000   30.03378  11.2%     -    0s
     0     0   29.70000    0   74   27.00000   29.70000  10.0%     -    0s
     0     0   29.53125    0   73   27.00000   29.53125  9.38%     -    0s
H    0     0                      28.0000000   29.53125  5.47%     -    0s
     0     0   29.40000    0   71   28.00000   29.40000  5.00%     -    0s
     0     0   29.26667    0   71   28.00000   29.26667  4.52%     -    0s
     0     0   29.19505    0   73   28.00000   29.19505  4.27%     -    0s
     0     0   29.17204    0   73   28.00000   29.17204  4.19%     -    0s
     0     0   29.15093    0   73   28.00000   29.15093  4.11%     -    0s
     0     0   29.02439    0   73   28.00000   29.02439  3.66%     -    0s
     0     0     cutoff    0        28.00000   28.99997  3.57%     -    0s

Cutting planes:
  Zero half: 33

Explored 0 nodes (481 simplex iterations) in 0.04 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%