Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:03 2012

Optimize a model with 180 rows, 77 columns and 360 nonzeros
Presolve removed 28 rows and 0 columns
Presolve time: 0.00s
Presolved: 152 rows, 77 columns, 320 nonzeros
Variable types: 0 continuous, 77 integer (77 binary)
Found heuristic solution: objective 29.0000000

Root relaxation: objective 3.500000e+01, 115 iterations, 0.00 seconds

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

     0     0   35.00000    0   60   29.00000   35.00000  20.7%     -    0s
H    0     0                      30.0000000   35.00000  16.7%     -    0s
     0     0   34.55556    0   77   30.00000   34.55556  15.2%     -    0s
     0     0   33.88889    0   74   30.00000   33.88889  13.0%     -    0s
     0     0   33.76923    0   73   30.00000   33.76923  12.6%     -    0s
H    0     0                      31.0000000   33.76923  8.93%     -    0s
     0     0   33.60000    0   76   31.00000   33.60000  8.39%     -    0s
H    0     0                      32.0000000   33.60000  5.00%     -    0s
     0     0   33.45455    0   77   32.00000   33.45455  4.55%     -    0s
     0     0   33.28713    0   77   32.00000   33.28713  4.02%     -    0s
     0     0   33.10959    0   76   32.00000   33.10959  3.47%     -    0s
     0     0   33.05882    0   70   32.00000   33.05882  3.31%     -    0s
     0     2   33.05882    0   70   32.00000   33.05882  3.31%     -    0s

Cutting planes:
  Zero half: 18

Explored 4 nodes (381 simplex iterations) in 0.03 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%