Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:52:23 2012 Optimize a model with 1 rows, 13 columns and 13 nonzeros Model has 40 quadratic objective terms Modified 13 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 13 columns, 13 nonzeros Presolved model has 53 quadratic objective terms Variable types: 0 continuous, 13 integer (13 binary) Found heuristic solution: objective 21.0000000 Root relaxation: objective 0.000000e+00, 14 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 13 21.00000 0.00000 100% - 0s H 0 0 19.0000000 0.00000 100% - 0s 0 2 2.15740 0 13 19.00000 2.15740 88.6% - 0s H 11 11 18.0000000 3.82941 78.7% 1.8 0s H 59 28 17.0000000 6.50664 61.7% 2.1 0s H 146 43 15.0000000 7.12102 52.5% 2.1 0s Explored 357 nodes (765 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.500000000000e+01, best bound 1.500000000000e+01, gap 0.0%