Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:43:47 2012 Optimize a model with 1 rows, 176 columns and 176 nonzeros Model has 185 quadratic objective terms Presolve removed 0 rows and 18 columns Presolve time: 0.00s Presolved: 186 rows, 343 columns, 713 nonzeros Variable types: 0 continuous, 343 integer (342 binary) Found heuristic solution: objective 55.0000000 Root relaxation: objective 0.000000e+00, 231 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 55.00000 0.00000 100% - 0s H 0 0 44.0000000 0.00000 100% - 0s 0 0 0.00000 0 62 44.00000 0.00000 100% - 0s 0 0 0.00000 0 31 44.00000 0.00000 100% - 0s H 0 0 22.0000000 0.00000 100% - 0s H 0 0 20.0000000 0.00000 100% - 0s 0 0 0.00000 0 27 20.00000 0.00000 100% - 0s 0 0 0.00000 0 31 20.00000 0.00000 100% - 0s 0 0 0.00000 0 31 20.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s H 0 0 16.0000000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s 0 2 0.00000 0 27 15.00000 0.00000 100% - 0s H 353 267 14.0000000 0.00000 100% 9.1 0s * 379 265 64 13.0000000 0.00000 100% 8.8 0s H 492 310 12.0000000 0.00000 100% 10.1 0s H 911 458 11.0000000 0.00000 100% 9.0 0s H 938 429 10.0000000 0.00000 100% 8.8 0s H 1046 442 9.0000000 0.00000 100% 8.1 0s H 1305 514 8.0000000 0.00000 100% 6.8 0s 40805 21830 3.00000 35 31 8.00000 1.00000 87.5% 1.7 8s 40815 21839 1.72996 27 301 8.00000 1.72866 78.4% 1.7 10s *40942 20760 36 7.0000000 2.44237 65.1% 2.0 11s Cutting planes: Gomory: 100 Cover: 240 MIR: 129 Flow cover: 127 Zero half: 309 Explored 41052 nodes (87666 simplex iterations) in 11.70 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%