Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:53:06 2012 Optimize a model with 1 rows, 18 columns and 18 nonzeros Model has 88 quadratic objective terms Modified 18 Q diagonals Presolve time: 0.01s Presolved: 1 rows, 18 columns, 18 nonzeros Presolved model has 106 quadratic objective terms Variable types: 0 continuous, 18 integer (18 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 0.000000e+00, 20 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 18 45.00000 0.00000 100% - 0s H 0 0 44.0000000 0.00000 100% - 0s H 0 0 42.0000000 0.00000 100% - 0s 0 2 3.26792 0 18 42.00000 3.26792 92.2% - 0s H 25 25 40.0000000 4.81444 88.0% 1.9 0s * 26 24 15 39.0000000 4.81444 87.7% 2.0 0s * 28 22 14 38.0000000 4.81444 87.3% 2.0 0s H 429 240 37.0000000 13.96353 62.3% 2.0 0s H 889 330 36.0000000 16.33968 54.6% 2.0 0s Explored 5685 nodes (11633 simplex iterations) in 0.31 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.600000000000e+01, best bound 3.600000000000e+01, gap 0.0%