Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:39:32 2012 Optimize a model with 1 rows, 170 columns and 170 nonzeros Model has 172 quadratic objective terms Presolve removed 0 rows and 22 columns Presolve time: 0.00s Presolved: 173 rows, 320 columns, 664 nonzeros Variable types: 0 continuous, 320 integer (319 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 0.000000e+00, 220 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 48 47.00000 0.00000 100% - 0s H 0 0 41.0000000 0.00000 100% - 0s 0 0 0.00000 0 41 41.00000 0.00000 100% - 0s 0 0 0.00000 0 40 41.00000 0.00000 100% - 0s H 0 0 29.0000000 0.00000 100% - 0s H 0 0 27.0000000 0.00000 100% - 0s 0 0 0.00000 0 61 27.00000 0.00000 100% - 0s 0 0 0.00000 0 35 27.00000 0.00000 100% - 0s H 0 0 22.0000000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s 0 2 0.00000 0 21 17.00000 0.00000 100% - 0s H 27 27 15.0000000 0.00000 100% 1.6 0s H 378 269 14.0000000 0.00000 100% 8.7 0s H 432 282 13.0000000 0.00000 100% 9.4 0s H 488 302 12.0000000 0.00000 100% 9.4 0s * 527 288 25 11.0000000 0.00000 100% 11.5 0s H 622 277 10.0000000 1.00000 90.0% 12.9 0s * 719 228 13 9.0000000 1.00000 88.9% 15.9 0s H 734 172 8.0000000 1.00000 87.5% 16.9 0s Cutting planes: Cover: 329 Explored 957 nodes (32735 simplex iterations) in 0.69 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%