Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:41:23 2012 Optimize a model with 1 rows, 173 columns and 173 nonzeros Model has 170 quadratic objective terms Presolve removed 0 rows and 25 columns Presolve time: 0.00s Presolved: 171 rows, 318 columns, 658 nonzeros Variable types: 0 continuous, 318 integer (317 binary) Found heuristic solution: objective 47.0000000 Root relaxation: objective 0.000000e+00, 203 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 45 47.00000 0.00000 100% - 0s H 0 0 41.0000000 0.00000 100% - 0s 0 0 0.00000 0 46 41.00000 0.00000 100% - 0s H 0 0 35.0000000 0.00000 100% - 0s 0 0 0.00000 0 35 35.00000 0.00000 100% - 0s H 0 0 27.0000000 0.00000 100% - 0s 0 0 0.00000 0 29 27.00000 0.00000 100% - 0s H 0 0 22.0000000 0.00000 100% - 0s 0 0 0.00000 0 28 22.00000 0.00000 100% - 0s 0 0 0.00000 0 35 22.00000 0.00000 100% - 0s 0 0 0.00000 0 35 22.00000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s 0 2 0.00000 0 23 21.00000 0.00000 100% - 0s H 101 88 20.0000000 0.00000 100% 2.4 0s H 103 88 19.0000000 0.00000 100% 2.4 0s H 108 85 16.0000000 0.00000 100% 2.3 0s H 117 92 15.0000000 0.00000 100% 2.3 0s H 297 220 14.0000000 0.00000 100% 6.2 0s H 297 193 12.0000000 0.00000 100% 6.2 0s H 385 209 11.0000000 0.00000 100% 8.7 0s H 404 207 10.0000000 0.00000 100% 8.5 0s H 514 209 8.0000000 0.00000 100% 9.1 0s H 4067 2228 7.0000000 0.00000 100% 3.0 0s 40805 24432 3.00000 50 35 7.00000 1.00000 85.7% 1.6 6s Cutting planes: Gomory: 90 Cover: 217 MIR: 109 Flow cover: 128 Zero half: 272 Explored 41069 nodes (88285 simplex iterations) in 9.59 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%