Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:35:56 2012 Optimize a model with 1 rows, 166 columns and 166 nonzeros Model has 166 quadratic objective terms Presolve removed 0 rows and 20 columns Presolve time: 0.00s Presolved: 167 rows, 312 columns, 644 nonzeros Variable types: 0 continuous, 312 integer (311 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 0.000000e+00, 215 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 54 43.00000 0.00000 100% - 0s 0 0 0.00000 0 34 43.00000 0.00000 100% - 0s H 0 0 31.0000000 0.00000 100% - 0s H 0 0 27.0000000 0.00000 100% - 0s 0 0 0.00000 0 52 27.00000 0.00000 100% - 0s 0 0 0.00000 0 26 27.00000 0.00000 100% - 0s H 0 0 23.0000000 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 H 0 0 19.0000000 0.00000 100% - 0s 0 0 0.00000 0 28 19.00000 0.00000 100% - 0s 0 0 0.00000 0 29 19.00000 0.00000 100% - 0s 0 0 0.00000 0 27 19.00000 0.00000 100% - 0s H 0 0 18.0000000 0.00000 100% - 0s 0 2 0.00000 0 27 18.00000 0.00000 100% - 0s H 81 71 15.0000000 0.00000 100% 2.3 0s H 378 206 11.0000000 0.00000 100% 5.9 0s * 459 221 29 10.0000000 0.00000 100% 6.4 0s H23929 14452 9.0000000 1.00000 88.9% 1.9 1s 40805 24725 8.00000 79 27 9.00000 1.00000 88.9% 1.8 6s H40969 23547 8.0000000 1.66359 79.2% 2.1 9s 40992 23550 6.25000 31 149 8.00000 1.68301 79.0% 2.1 10s Cutting planes: Gomory: 67 Cover: 173 MIR: 179 Flow cover: 95 Zero half: 363 Explored 41460 nodes (112231 simplex iterations) in 12.33 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%