Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:34:47 2012 Optimize a model with 1 rows, 163 columns and 163 nonzeros Model has 136 quadratic objective terms Presolve removed 0 rows and 19 columns Presolve time: 0.00s Presolved: 137 rows, 280 columns, 552 nonzeros Variable types: 0 continuous, 280 integer (279 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 0.000000e+00, 182 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 28 41.00000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s 0 0 0.00000 0 22 21.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s 0 0 0.00000 0 14 13.00000 0.00000 100% - 0s 0 0 0.00000 0 46 13.00000 0.00000 100% - 0s 0 0 0.00000 0 13 13.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 2 0.00000 0 13 12.00000 0.00000 100% - 0s H 29 29 10.0000000 0.00000 100% 2.0 0s H 54 45 9.0000000 0.00000 100% 2.1 0s H 108 56 8.0000000 0.00000 100% 3.0 0s H 226 97 7.0000000 0.00000 100% 4.3 0s H 326 85 4.0000000 0.00000 100% 5.2 0s H 329 74 3.0000000 0.00000 100% 5.2 0s * 330 42 19 2.0000000 0.00000 100% 5.2 0s * 446 4 12 1.0000000 0.00000 100% 10.0 0s Cutting planes: Cover: 223 Explored 447 nodes (4742 simplex iterations) in 0.12 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%