Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:10:57 2012 Optimize a model with 1 rows, 47 columns and 47 nonzeros Model has 52 quadratic objective terms Presolve removed 0 rows and 3 columns Presolve time: 0.00s Presolved: 53 rows, 96 columns, 200 nonzeros Variable types: 0 continuous, 96 integer (95 binary) Found heuristic solution: objective 20.0000000 Root relaxation: objective 0.000000e+00, 74 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 20.00000 0.00000 100% - 0s H 0 0 16.0000000 0.00000 100% - 0s 0 0 0.00000 0 17 16.00000 0.00000 100% - 0s 0 0 0.00000 0 20 16.00000 0.00000 100% - 0s 0 0 0.00000 0 10 16.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s H 0 0 9.0000000 0.00000 100% - 0s 0 2 0.00000 0 10 9.00000 0.00000 100% - 0s H 18 18 7.0000000 0.00000 100% 3.1 0s * 142 63 14 6.0000000 0.00000 100% 7.1 0s * 167 51 11 5.0000000 1.00000 80.0% 8.3 0s * 184 26 8 4.0000000 1.00000 75.0% 9.7 0s Cutting planes: Cover: 99 Explored 211 nodes (2503 simplex iterations) in 0.04 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%