Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:11:26 2012 Optimize a model with 1 rows, 50 columns and 50 nonzeros Model has 57 quadratic objective terms Presolve removed 0 rows and 2 columns Presolve time: 0.00s Presolved: 58 rows, 105 columns, 219 nonzeros Variable types: 0 continuous, 105 integer (104 binary) Found heuristic solution: objective 20.0000000 Root relaxation: objective 0.000000e+00, 76 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 18 20.00000 0.00000 100% - 0s H 0 0 16.0000000 0.00000 100% - 0s 0 0 0.00000 0 15 16.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s 0 0 0.00000 0 18 13.00000 0.00000 100% - 0s 0 0 0.00000 0 18 13.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 2 0.00000 0 12 11.00000 0.00000 100% - 0s H 42 27 10.0000000 0.00000 100% 2.2 0s H 51 34 9.0000000 0.00000 100% 2.6 0s H 53 32 7.0000000 0.00000 100% 2.6 0s * 139 53 8 6.0000000 0.00000 100% 5.1 0s Cutting planes: Cover: 110 Explored 262 nodes (3763 simplex iterations) in 0.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%