Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:38:27 2012 Optimize a model with 1 rows, 29 columns and 29 nonzeros Model has 43 quadratic objective terms Presolve removed 0 rows and 3 columns Presolve time: 0.00s Presolved: 44 rows, 69 columns, 155 nonzeros Variable types: 0 continuous, 69 integer (68 binary) Found heuristic solution: objective 17.0000000 Found heuristic solution: objective 16.0000000 Root relaxation: objective 0.000000e+00, 49 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 16 16.00000 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 32 11.00000 0.00000 100% - 0s 0 0 0.00000 0 15 11.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s 0 0 0.00000 0 14 10.00000 0.00000 100% - 0s 0 0 0.00000 0 8 10.00000 0.00000 100% - 0s H 0 0 8.0000000 0.00000 100% - 0s 0 0 0.00000 0 14 8.00000 0.00000 100% - 0s 0 0 0.00000 0 14 8.00000 0.00000 100% - 0s 0 2 0.00000 0 12 8.00000 0.00000 100% - 0s Cutting planes: Cover: 79 MIR: 6 Zero half: 4 Explored 128 nodes (1357 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%