Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:37:20 2012 Optimize a model with 1 rows, 169 columns and 169 nonzeros Model has 170 quadratic objective terms Presolve removed 0 rows and 21 columns Presolve time: 0.00s Presolved: 171 rows, 318 columns, 658 nonzeros Variable types: 0 continuous, 318 integer (317 binary) Found heuristic solution: objective 42.0000000 Root relaxation: objective 0.000000e+00, 207 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 35 42.00000 0.00000 100% - 0s H 0 0 31.0000000 0.00000 100% - 0s 0 0 0.00000 0 25 31.00000 0.00000 100% - 0s H 0 0 23.0000000 0.00000 100% - 0s 0 0 0.00000 0 34 23.00000 0.00000 100% - 0s H 0 0 20.0000000 0.00000 100% - 0s H 0 0 19.0000000 0.00000 100% - 0s 0 0 0.00000 0 31 19.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s 0 0 0.00000 0 23 17.00000 0.00000 100% - 0s H 0 0 16.0000000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s 0 0 0.00000 0 28 14.00000 0.00000 100% - 0s 0 0 0.00000 0 14 14.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s 0 0 0.00000 0 19 13.00000 0.00000 100% - 0s 0 0 0.00000 0 17 13.00000 0.00000 100% - 0s 0 0 0.00000 0 20 13.00000 0.00000 100% - 0s 0 0 0.00000 0 20 13.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 2 0.00000 0 20 12.00000 0.00000 100% - 0s H 27 27 11.0000000 0.00000 100% 1.9 0s H 342 203 8.0000000 0.00000 100% 9.2 0s H 462 229 7.0000000 0.00000 100% 10.0 0s * 610 108 11 6.0000000 3.22222 46.3% 27.9 0s Cutting planes: Cover: 312 Explored 719 nodes (21850 simplex iterations) in 0.45 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%