Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:38:33 2012 Optimize a model with 1 rows, 30 columns and 30 nonzeros Model has 49 quadratic objective terms Presolve time: 0.00s Presolved: 50 rows, 79 columns, 177 nonzeros Variable types: 0 continuous, 79 integer (79 binary) Found heuristic solution: objective 20.0000000 Root relaxation: objective 0.000000e+00, 67 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 22 20.00000 0.00000 100% - 0s H 0 0 19.0000000 0.00000 100% - 0s 0 0 0.00000 0 23 19.00000 0.00000 100% - 0s 0 0 0.00000 0 16 19.00000 0.00000 100% - 0s H 0 0 16.0000000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s 0 2 0.00000 0 15 14.00000 0.00000 100% - 0s H 54 39 13.0000000 0.00000 100% 3.2 0s H 132 83 12.0000000 0.00000 100% 4.7 0s H 158 80 11.0000000 0.00000 100% 5.2 0s * 210 80 12 10.0000000 1.00000 90.0% 5.6 0s * 277 51 10 8.0000000 1.27273 84.1% 6.6 0s Cutting planes: Cover: 95 Explored 331 nodes (2628 simplex iterations) in 0.05 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%