Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:43:45 2012 Optimize a model with 1 rows, 176 columns and 176 nonzeros Model has 170 quadratic objective terms Presolve removed 0 rows and 23 columns Presolve time: 0.00s Presolved: 171 rows, 323 columns, 663 nonzeros Variable types: 0 continuous, 323 integer (322 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 0.000000e+00, 206 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 58 46.00000 0.00000 100% - 0s 0 0 0.00000 0 38 46.00000 0.00000 100% - 0s H 0 0 26.0000000 0.00000 100% - 0s 0 0 0.00000 0 45 26.00000 0.00000 100% - 0s 0 0 0.00000 0 17 26.00000 0.00000 100% - 0s H 0 0 16.0000000 0.00000 100% - 0s 0 0 0.00000 0 30 16.00000 0.00000 100% - 0s 0 0 0.00000 0 30 16.00000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 2 0.00000 0 21 12.00000 0.00000 100% - 0s H 303 199 11.0000000 0.00000 100% 9.6 0s H 326 203 10.0000000 0.00000 100% 9.0 0s * 339 181 47 9.0000000 0.00000 100% 8.8 0s * 455 214 15 8.0000000 0.00000 100% 11.0 0s H 459 175 7.0000000 0.00000 100% 11.2 0s * 537 144 11 6.0000000 0.14925 97.5% 12.9 0s * 620 82 6 5.0000000 3.00000 40.0% 20.0 0s Cutting planes: Cover: 315 Explored 703 nodes (17318 simplex iterations) in 0.36 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.000000000000e+00, best bound 5.000000000000e+00, gap 0.0%