Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:33:12 2012 Optimize a model with 1 rows, 159 columns and 159 nonzeros Model has 145 quadratic objective terms Presolve removed 0 rows and 27 columns Presolve time: 0.00s Presolved: 146 rows, 277 columns, 567 nonzeros Variable types: 0 continuous, 277 integer (276 binary) Found heuristic solution: objective 49.0000000 Root relaxation: objective 0.000000e+00, 187 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 39 49.00000 0.00000 100% - 0s H 0 0 37.0000000 0.00000 100% - 0s 0 0 0.00000 0 29 37.00000 0.00000 100% - 0s H 0 0 27.0000000 0.00000 100% - 0s H 0 0 25.0000000 0.00000 100% - 0s 0 0 0.00000 0 34 25.00000 0.00000 100% - 0s H 0 0 20.0000000 0.00000 100% - 0s 0 0 0.00000 0 25 20.00000 0.00000 100% - 0s 0 0 0.00000 0 22 20.00000 0.00000 100% - 0s 0 0 0.00000 0 22 20.00000 0.00000 100% - 0s 0 0 0.00000 0 20 20.00000 0.00000 100% - 0s 0 0 0.00000 0 14 20.00000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s 0 0 0.00000 0 13 14.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.00000 0 20 11.00000 0.00000 100% - 0s 0 0 0.00000 0 20 11.00000 0.00000 100% - 0s 0 2 0.00000 0 20 11.00000 0.00000 100% - 0s H 16 16 10.0000000 0.00000 100% 3.7 0s H 54 46 9.0000000 0.00000 100% 2.4 0s H 351 206 8.0000000 0.00000 100% 7.2 0s H 371 171 7.0000000 0.00000 100% 8.5 0s * 381 156 15 6.0000000 0.00000 100% 9.0 0s Cutting planes: Cover: 267 MIR: 3 Explored 636 nodes (17195 simplex iterations) in 0.32 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%