Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:36:54 2012 Optimize a model with 1 rows, 168 columns and 168 nonzeros Model has 160 quadratic objective terms Presolve removed 0 rows and 23 columns Presolve time: 0.00s Presolved: 161 rows, 305 columns, 625 nonzeros Variable types: 0 continuous, 305 integer (304 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 0.000000e+00, 195 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 43 48.00000 0.00000 100% - 0s H 0 0 37.0000000 0.00000 100% - 0s 0 0 0.00000 0 36 37.00000 0.00000 100% - 0s H 0 0 28.0000000 0.00000 100% - 0s H 0 0 26.0000000 0.00000 100% - 0s 0 0 0.00000 0 48 26.00000 0.00000 100% - 0s 0 0 0.00000 0 34 26.00000 0.00000 100% - 0s 0 0 0.00000 0 22 26.00000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s H 0 0 20.0000000 0.00000 100% - 0s 0 0 0.00000 0 28 20.00000 0.00000 100% - 0s 0 0 0.00000 0 23 20.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s 0 2 0.00000 0 23 15.00000 0.00000 100% - 0s H 27 27 14.0000000 0.00000 100% 1.6 0s H 54 48 13.0000000 0.00000 100% 1.2 0s H 81 66 11.0000000 0.00000 100% 1.7 0s H 327 211 10.0000000 0.00000 100% 5.5 0s H 592 289 8.0000000 0.00000 100% 8.5 0s H 609 255 7.0000000 1.00000 85.7% 8.8 0s * 624 200 8 6.0000000 1.00000 83.3% 10.1 0s Cutting planes: Cover: 302 MIR: 2 Explored 842 nodes (21526 simplex iterations) in 0.40 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%