Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:50 2012

Optimize a model with 307 rows, 82 columns and 614 nonzeros
Presolve removed 84 rows and 0 columns
Presolve time: 0.00s
Presolved: 223 rows, 82 columns, 509 nonzeros
Variable types: 0 continuous, 82 integer (82 binary)
Found heuristic solution: objective 23.0000000

Root relaxation: objective 3.300000e+01, 126 iterations, 0.00 seconds

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

     0     0   33.00000    0   64   23.00000   33.00000  43.5%     -    0s
H    0     0                      25.0000000   33.00000  32.0%     -    0s
     0     0   32.00000    0   75   25.00000   32.00000  28.0%     -    0s
H    0     0                      27.0000000   32.00000  18.5%     -    0s
     0     0   31.38538    0   81   27.00000   31.38538  16.2%     -    0s
     0     0   30.75758    0   77   27.00000   30.75758  13.9%     -    0s
H    0     0                      29.0000000   30.75758  6.06%     -    0s
     0     0   30.58333    0   79   29.00000   30.58333  5.46%     -    0s
     0     0   30.52273    0   78   29.00000   30.52273  5.25%     -    0s
     0     0   30.45342    0   79   29.00000   30.45342  5.01%     -    0s
     0     0   30.40476    0   79   29.00000   30.40476  4.84%     -    0s
     0     0   30.39080    0   81   29.00000   30.39080  4.80%     -    0s
     0     0   30.39080    0   80   29.00000   30.39080  4.80%     -    0s
     0     2   30.35417    0   79   29.00000   30.35417  4.67%     -    0s

Cutting planes:
  Zero half: 27

Explored 4 nodes (563 simplex iterations) in 0.04 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.900000000000e+01, best bound 2.900000000000e+01, gap 0.0%