Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:39:57 2012 Optimize a model with 1 rows, 171 columns and 171 nonzeros Model has 163 quadratic objective terms Presolve removed 0 rows and 19 columns Presolve time: 0.00s Presolved: 164 rows, 315 columns, 641 nonzeros Variable types: 0 continuous, 315 integer (314 binary) Found heuristic solution: objective 52.0000000 Root relaxation: objective 0.000000e+00, 218 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 46 52.00000 0.00000 100% - 0s H 0 0 43.0000000 0.00000 100% - 0s 0 0 0.00000 0 36 43.00000 0.00000 100% - 0s H 0 0 39.0000000 0.00000 100% - 0s 0 0 0.00000 0 36 39.00000 0.00000 100% - 0s H 0 0 18.0000000 0.00000 100% - 0s 0 0 0.00000 0 18 18.00000 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 0 0 0.00000 0 23 17.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s 0 2 0.00000 0 23 13.00000 0.00000 100% - 0s H 27 27 12.0000000 0.00000 100% 2.7 0s H 54 42 9.0000000 0.00000 100% 2.5 0s H 363 119 7.0000000 0.00000 100% 11.4 0s H 468 111 6.0000000 1.00000 83.3% 14.2 0s Cutting planes: Cover: 314 MIR: 1 Explored 596 nodes (17105 simplex iterations) in 0.35 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%