Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:53:39 2012 Optimize a model with 1 rows, 20 columns and 20 nonzeros Model has 88 quadratic objective terms Modified 20 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 20 columns, 20 nonzeros Presolved model has 108 quadratic objective terms Variable types: 0 continuous, 20 integer (20 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 0.000000e+00, 21 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 20 41.00000 0.00000 100% - 0s H 0 0 38.0000000 0.00000 100% - 0s 0 2 2.61674 0 20 38.00000 2.61674 93.1% - 0s H 61 43 37.0000000 8.30621 77.6% 2.0 0s H 94 56 33.0000000 8.42728 74.5% 2.0 0s H 631 256 32.0000000 15.74681 50.8% 2.1 0s Explored 3854 nodes (8061 simplex iterations) in 0.25 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%