Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:40:51 2012 Optimize a model with 1 rows, 41 columns and 41 nonzeros Model has 104 quadratic objective terms Modified 41 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 41 columns, 41 nonzeros Presolved model has 145 quadratic objective terms Variable types: 0 continuous, 41 integer (41 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 0.000000e+00, 43 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 41 48.00000 0.00000 100% - 0s H 0 0 34.0000000 0.00000 100% - 0s H 0 0 31.0000000 0.00000 100% - 0s 0 2 2.41974 0 41 31.00000 2.41974 92.2% - 0s H 5 5 29.0000000 3.28397 88.7% 1.6 0s H 18 18 27.0000000 3.28397 87.8% 1.9 0s H 647 465 26.0000000 6.09822 76.5% 2.4 0s 73339 16373 22.68499 29 27 26.00000 21.17344 18.6% 2.4 5s 147741 7435 23.63746 34 20 26.00000 23.63746 9.09% 2.4 10s Explored 161365 nodes (394414 simplex iterations) in 10.99 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.600000000000e+01, best bound 2.600000000000e+01, gap 0.0%