Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:10:18 2012

Optimize a model with 99 rows, 91 columns and 336 nonzeros
Presolve removed 0 rows and 2 columns
Presolve time: 0.00s
Presolved: 99 rows, 89 columns, 334 nonzeros
Variable types: 0 continuous, 89 integer (88 binary)
Found heuristic solution: objective 18.0000000

Root relaxation: objective 0.000000e+00, 52 iterations, 0.00 seconds

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

     0     0    0.00000    0   35   18.00000    0.00000   100%     -    0s
H    0     0                      13.0000000    0.00000   100%     -    0s
H    0     0                      10.0000000    0.00000   100%     -    0s
     0     0    0.39437    0   37   10.00000    0.39437  96.1%     -    0s
     0     0    0.77120    0   40   10.00000    0.77120  92.3%     -    0s
     0     0    0.77120    0   40   10.00000    0.77120  92.3%     -    0s
     0     2    0.82840    0   40   10.00000    0.82840  91.7%     -    0s
*   20    13              15       7.0000000    1.88689  73.0%  13.2    0s
*   35    13               9       6.0000000    2.85083  52.5%  12.1    0s

Cutting planes:
  Gomory: 3
  Mod-K: 1

Explored 64 nodes (885 simplex iterations) in 0.05 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%