Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:52:43 2012 Optimize a model with 1 rows, 16 columns and 16 nonzeros Model has 68 quadratic objective terms Modified 16 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 16 columns, 16 nonzeros Presolved model has 84 quadratic objective terms Variable types: 0 continuous, 16 integer (16 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 0.000000e+00, 18 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 16 30.00000 0.00000 100% - 0s H 0 0 28.0000000 0.00000 100% - 0s 0 2 3.02278 0 16 28.00000 3.02278 89.2% - 0s H 771 187 27.0000000 15.79891 41.5% 2.1 0s Explored 2172 nodes (4577 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.700000000000e+01, best bound 2.700000000000e+01, gap 0.0%