Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:59 2012

Optimize a model with 395 rows, 90 columns and 790 nonzeros
Presolve removed 144 rows and 0 columns
Presolve time: 0.00s
Presolved: 251 rows, 90 columns, 621 nonzeros
Variable types: 0 continuous, 90 integer (90 binary)
Found heuristic solution: objective 26.0000000

Root relaxation: objective 3.248387e+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   32.48387    0   82   26.00000   32.48387  24.9%     -    0s
     0     0   32.02673    0   87   26.00000   32.02673  23.2%     -    0s
H    0     0                      27.0000000   32.02673  18.6%     -    0s
     0     0   31.80890    0   89   27.00000   31.80890  17.8%     -    0s
     0     0   31.65123    0   83   27.00000   31.65123  17.2%     -    0s
     0     0   31.29764    0   81   27.00000   31.29764  15.9%     -    0s
     0     0   31.13861    0   87   27.00000   31.13861  15.3%     -    0s
     0     0   31.07491    0   86   27.00000   31.07491  15.1%     -    0s
H    0     0                      28.0000000   31.07491  11.0%     -    0s
     0     0   31.03090    0   87   28.00000   31.03090  10.8%     -    0s
     0     0   31.02533    0   86   28.00000   31.02533  10.8%     -    0s
     0     0   30.99705    0   86   28.00000   30.99705  10.7%     -    0s
     0     0   30.97369    0   88   28.00000   30.97369  10.6%     -    0s
     0     0   30.97344    0   88   28.00000   30.97344  10.6%     -    0s
     0     0   30.97344    0   87   28.00000   30.97344  10.6%     -    0s
     0     2   30.97226    0   87   28.00000   30.97226  10.6%     -    0s

Cutting planes:
  Clique: 2
  Zero half: 37

Explored 75 nodes (2040 simplex iterations) in 0.11 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%