Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:33:35 2012 Optimize a model with 1 rows, 160 columns and 160 nonzeros Model has 154 quadratic objective terms Presolve removed 0 rows and 22 columns Presolve time: 0.00s Presolved: 155 rows, 292 columns, 600 nonzeros Variable types: 0 continuous, 292 integer (291 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 0.000000e+00, 204 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 33 46.00000 0.00000 100% - 0s H 0 0 29.0000000 0.00000 100% - 0s 0 0 0.00000 0 21 29.00000 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 35 19.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s 0 0 0.00000 0 20 17.00000 0.00000 100% - 0s 0 0 0.00000 0 30 17.00000 0.00000 100% - 0s 0 0 0.00000 0 25 17.00000 0.00000 100% - 0s 0 0 0.00000 0 33 17.00000 0.00000 100% - 0s 0 0 0.00000 0 22 17.00000 0.00000 100% - 0s 0 2 0.00000 0 18 17.00000 0.00000 100% - 0s H 27 27 16.0000000 0.00000 100% 0.9 0s H 162 143 14.0000000 0.00000 100% 2.6 0s H 354 239 12.0000000 0.00000 100% 5.1 0s * 486 301 19 11.0000000 0.00000 100% 6.8 0s H 516 280 10.0000000 0.00000 100% 8.3 0s H 570 229 8.0000000 0.00000 100% 9.6 0s Cutting planes: Cover: 282 Explored 977 nodes (31411 simplex iterations) in 0.60 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%