Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:28:36 2012 Optimize a model with 1 rows, 156 columns and 156 nonzeros Model has 129 quadratic objective terms Presolve removed 0 rows and 25 columns Presolve time: 0.00s Presolved: 130 rows, 260 columns, 518 nonzeros Variable types: 0 continuous, 260 integer (259 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 0.000000e+00, 168 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 29 29.00000 0.00000 100% - 0s 0 0 0.00000 0 28 29.00000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s 0 0 0.00000 0 30 21.00000 0.00000 100% - 0s 0 0 0.00000 0 20 21.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s 0 0 0.00000 0 12 17.00000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.00000 0 16 11.00000 0.00000 100% - 0s 0 0 0.00000 0 16 11.00000 0.00000 100% - 0s H 0 0 9.0000000 0.00000 100% - 0s 0 2 0.00000 0 15 9.00000 0.00000 100% - 0s H 84 57 7.0000000 0.00000 100% 2.6 0s H 108 61 6.0000000 0.00000 100% 3.0 0s H 227 69 4.0000000 0.00000 100% 5.7 0s * 232 56 16 3.0000000 0.00000 100% 5.6 0s * 238 39 16 2.0000000 0.00000 100% 5.5 0s H 303 6 1.0000000 0.00000 100% 11.2 0s Cutting planes: Cover: 195 Explored 304 nodes (4001 simplex iterations) in 0.10 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.000000000000e+00, best bound 1.000000000000e+00, gap 0.0%