Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:51 2012

Optimize a model with 309 rows, 82 columns and 618 nonzeros
Presolve removed 93 rows and 2 columns
Presolve time: 0.00s
Presolved: 216 rows, 80 columns, 494 nonzeros
Variable types: 0 continuous, 80 integer (80 binary)
Found heuristic solution: objective 26.0000000

Root relaxation: objective 3.245161e+01, 140 iterations, 0.00 seconds

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

     0     0   32.45161    0   77   26.00000   32.45161  24.8%     -    0s
H    0     0                      28.0000000   32.45161  15.9%     -    0s
     0     0   31.88304    0   75   28.00000   31.88304  13.9%     -    0s
H    0     0                      29.0000000   31.88304  9.94%     -    0s
     0     0   31.69611    0   77   29.00000   31.69611  9.30%     -    0s
     0     0   31.40000    0   77   29.00000   31.40000  8.28%     -    0s
H    0     0                      30.0000000   31.40000  4.67%     -    0s
     0     0   31.32353    0   77   30.00000   31.32353  4.41%     -    0s
     0     0   31.13953    0   78   30.00000   31.13953  3.80%     -    0s
     0     0     cutoff    0        30.00000   30.99997  3.33%     -    0s

Cutting planes:
  Zero half: 47

Explored 0 nodes (390 simplex iterations) in 0.03 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.000000000000e+01, best bound 3.000000000000e+01, gap 0.0%