Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:54 2012

Optimize a model with 373 rows, 86 columns and 746 nonzeros
Presolve removed 131 rows and 0 columns
Presolve time: 0.00s
Presolved: 242 rows, 86 columns, 584 nonzeros
Variable types: 0 continuous, 86 integer (86 binary)
Found heuristic solution: objective 27.0000000

Root relaxation: objective 3.166758e+01, 175 iterations, 0.00 seconds

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

     0     0   31.66758    0   82   27.00000   31.66758  17.3%     -    0s
     0     0   31.21218    0   84   27.00000   31.21218  15.6%     -    0s
     0     0   31.04779    0   84   27.00000   31.04779  15.0%     -    0s
H    0     0                      28.0000000   31.04779  10.9%     -    0s
     0     0   30.93863    0   84   28.00000   30.93863  10.5%     -    0s
     0     0   30.87169    0   85   28.00000   30.87169  10.3%     -    0s
     0     0   30.75516    0   84   28.00000   30.75516  9.84%     -    0s
     0     0   30.58895    0   86   28.00000   30.58895  9.25%     -    0s
     0     0   30.47771    0   85   28.00000   30.47771  8.85%     -    0s
     0     0   30.43650    0   86   28.00000   30.43650  8.70%     -    0s
     0     0   30.43311    0   86   28.00000   30.43311  8.69%     -    0s
     0     0   30.43311    0   86   28.00000   30.43311  8.69%     -    0s
     0     2   30.43226    0   86   28.00000   30.43226  8.69%     -    0s

Cutting planes:
  Clique: 2
  Zero half: 30

Explored 25 nodes (1127 simplex iterations) in 0.08 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%