Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:27:29 2012 Optimize a model with 1 rows, 153 columns and 153 nonzeros Model has 131 quadratic objective terms Presolve removed 0 rows and 27 columns Presolve time: 0.00s Presolved: 132 rows, 257 columns, 519 nonzeros Variable types: 0 continuous, 257 integer (256 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 0.000000e+00, 156 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 29 29.00000 0.00000 100% - 0s 0 0 0.00000 0 24 29.00000 0.00000 100% - 0s H 0 0 22.0000000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s 0 0 0.00000 0 28 21.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s 0 0 0.00000 0 17 14.00000 0.00000 100% - 0s 0 0 0.00000 0 17 14.00000 0.00000 100% - 0s 0 0 0.00000 0 11 14.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s 0 0 0.00000 0 17 10.00000 0.00000 100% - 0s 0 0 0.00000 0 13 10.00000 0.00000 100% - 0s H 0 0 9.0000000 0.00000 100% - 0s H 0 0 7.0000000 0.00000 100% - 0s 0 2 0.00000 0 8 7.00000 0.00000 100% - 0s H 136 71 6.0000000 0.00000 100% 2.5 0s * 429 159 11 5.0000000 0.00000 100% 8.9 0s * 557 40 6 4.0000000 3.00000 25.0% 22.0 0s Cutting planes: Cover: 239 Explored 598 nodes (13879 simplex iterations) in 0.26 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%