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 55 quadratic objective terms Modified 16 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 16 columns, 16 nonzeros Presolved model has 71 quadratic objective terms Variable types: 0 continuous, 16 integer (16 binary) Found heuristic solution: objective 25.0000000 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 25.00000 0.00000 100% - 0s H 0 0 23.0000000 0.00000 100% - 0s 0 2 2.38157 0 16 23.00000 2.38157 89.6% - 0s H 5 5 19.0000000 4.43275 76.7% 1.6 0s * 114 61 8 18.0000000 8.09931 55.0% 2.1 0s Explored 592 nodes (1253 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%