Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:34:24 2012 Optimize a model with 1 rows, 162 columns and 162 nonzeros Model has 130 quadratic objective terms Presolve removed 0 rows and 28 columns Presolve time: 0.00s Presolved: 131 rows, 264 columns, 524 nonzeros Variable types: 0 continuous, 264 integer (263 binary) Found heuristic solution: objective 34.0000000 Root relaxation: objective 0.000000e+00, 165 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 30 34.00000 0.00000 100% - 0s H 0 0 25.0000000 0.00000 100% - 0s 0 0 0.00000 0 15 25.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.00000 0 27 11.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s 0 0 0.00000 0 13 10.00000 0.00000 100% - 0s 0 0 0.00000 0 11 10.00000 0.00000 100% - 0s H 0 0 8.0000000 0.00000 100% - 0s 0 0 0.00000 0 10 8.00000 0.00000 100% - 0s H 0 0 5.0000000 0.00000 100% - 0s 0 0 0.00000 0 11 5.00000 0.00000 100% - 0s 0 0 0.00000 0 10 5.00000 0.00000 100% - 0s H 0 0 4.0000000 0.00000 100% - 0s 0 0 0.00000 0 13 4.00000 0.00000 100% - 0s 0 0 0.00000 0 13 4.00000 0.00000 100% - 0s 0 2 0.00000 0 13 4.00000 0.00000 100% - 0s H 272 32 2.0000000 0.00000 100% 5.7 0s Cutting planes: Cover: 219 Explored 391 nodes (5148 simplex iterations) in 0.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+00, best bound 2.000000000000e+00, gap 0.0%