Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:34:25 2012 Optimize a model with 1 rows, 162 columns and 162 nonzeros Model has 140 quadratic objective terms Presolve removed 0 rows and 31 columns Presolve time: 0.00s Presolved: 141 rows, 271 columns, 551 nonzeros Variable types: 0 continuous, 271 integer (270 binary) Found heuristic solution: objective 36.0000000 Root relaxation: objective 0.000000e+00, 172 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 28 36.00000 0.00000 100% - 0s H 0 0 28.0000000 0.00000 100% - 0s 0 0 0.00000 0 18 28.00000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s 0 0 0.00000 0 10 15.00000 0.00000 100% - 0s H 0 0 9.0000000 0.00000 100% - 0s 0 0 0.00000 0 30 9.00000 0.00000 100% - 0s 0 0 0.00000 0 7 9.00000 0.00000 100% - 0s H 0 0 7.0000000 0.00000 100% - 0s 0 0 0.00000 0 11 7.00000 0.00000 100% - 0s 0 0 0.00000 0 8 7.00000 0.00000 100% - 0s 0 0 0.00000 0 11 7.00000 0.00000 100% - 0s 0 0 0.00000 0 11 7.00000 0.00000 100% - 0s 0 2 0.00000 0 11 7.00000 0.00000 100% - 0s H 44 33 6.0000000 0.00000 100% 1.8 0s H 163 66 5.0000000 0.00000 100% 3.0 0s H 272 64 4.0000000 0.00000 100% 3.9 0s Cutting planes: Cover: 246 MIR: 5 Zero half: 1 Explored 519 nodes (11080 simplex iterations) in 0.22 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%