Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:11:37 2012 Optimize a model with 1 rows, 51 columns and 51 nonzeros Model has 67 quadratic objective terms Presolve removed 0 rows and 1 columns Presolve time: 0.00s Presolved: 68 rows, 117 columns, 251 nonzeros Variable types: 0 continuous, 117 integer (116 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 0.000000e+00, 86 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 23 28.00000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s 0 0 0.00000 0 17 21.00000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s 0 0 0.00000 0 38 15.00000 0.00000 100% - 0s 0 0 0.00000 0 17 15.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s 0 0 0.00000 0 17 13.00000 0.00000 100% - 0s 0 0 0.00000 0 17 13.00000 0.00000 100% - 0s 0 0 0.00000 0 17 13.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 2 0.00000 0 17 12.00000 0.00000 100% - 0s H 54 43 11.0000000 0.00000 100% 2.9 0s H 117 74 9.0000000 0.00000 100% 4.4 0s H 208 87 8.0000000 0.00000 100% 8.0 0s H 212 66 7.0000000 0.00000 100% 8.0 0s Cutting planes: Cover: 125 MIR: 3 Zero half: 2 Explored 299 nodes (5471 simplex iterations) in 0.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%