Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:01 2012

Optimize a model with 449 rows, 91 columns and 898 nonzeros
Presolve removed 160 rows and 0 columns
Presolve time: 0.00s
Presolved: 289 rows, 91 columns, 715 nonzeros
Variable types: 0 continuous, 91 integer (91 binary)
Found heuristic solution: objective 25.0000000

Root relaxation: objective 3.248148e+01, 185 iterations, 0.00 seconds

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

     0     0   32.48148    0   91   25.00000   32.48148  29.9%     -    0s
H    0     0                      26.0000000   32.48148  24.9%     -    0s
     0     0   31.88028    0   89   26.00000   31.88028  22.6%     -    0s
     0     0   31.59762    0   88   26.00000   31.59762  21.5%     -    0s
     0     0   31.36930    0   91   26.00000   31.36930  20.7%     -    0s
H    0     0                      27.0000000   31.36930  16.2%     -    0s
     0     0   31.27615    0   90   27.00000   31.27615  15.8%     -    0s
     0     0   31.20022    0   91   27.00000   31.20022  15.6%     -    0s
     0     0   31.03015    0   88   27.00000   31.03015  14.9%     -    0s
     0     0   30.96879    0   90   27.00000   30.96879  14.7%     -    0s
     0     0   30.94361    0   91   27.00000   30.94361  14.6%     -    0s
     0     0   30.92056    0   91   27.00000   30.92056  14.5%     -    0s
     0     0   30.90418    0   91   27.00000   30.90418  14.5%     -    0s
     0     0   30.90418    0   91   27.00000   30.90418  14.5%     -    0s
     0     2   30.90024    0   91   27.00000   30.90024  14.4%     -    0s

Cutting planes:
  Zero half: 45

Explored 174 nodes (4829 simplex iterations) in 0.20 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%