Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:27:49 2012 Optimize a model with 1 rows, 154 columns and 154 nonzeros Model has 149 quadratic objective terms Presolve removed 0 rows and 23 columns Presolve time: 0.00s Presolved: 150 rows, 280 columns, 578 nonzeros Variable types: 0 continuous, 280 integer (279 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 0.000000e+00, 197 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 25 43.00000 0.00000 100% - 0s H 0 0 24.0000000 0.00000 100% - 0s 0 0 0.00000 0 28 24.00000 0.00000 100% - 0s H 0 0 18.0000000 0.00000 100% - 0s 0 0 0.00000 0 31 18.00000 0.00000 100% - 0s 0 0 0.00000 0 21 18.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s 0 0 0.00000 0 22 13.00000 0.00000 100% - 0s 0 0 0.00000 0 22 13.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 2 0.00000 0 22 11.00000 0.00000 100% - 0s * 503 275 20 9.0000000 0.00000 100% 7.5 0s 40805 24074 3.00000 67 22 9.00000 1.00000 88.9% 1.6 5s *40979 22900 51 8.0000000 1.64452 79.4% 1.9 7s Cutting planes: Gomory: 64 Cover: 182 MIR: 120 Flow cover: 110 Zero half: 235 Explored 41430 nodes (97542 simplex iterations) in 8.92 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%