Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:44:33 2012 Optimize a model with 1 rows, 177 columns and 177 nonzeros Model has 160 quadratic objective terms Presolve removed 0 rows and 24 columns Presolve time: 0.00s Presolved: 161 rows, 313 columns, 633 nonzeros Variable types: 0 continuous, 313 integer (312 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 0.000000e+00, 198 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 41 43.00000 0.00000 100% - 0s H 0 0 32.0000000 0.00000 100% - 0s 0 0 0.00000 0 41 32.00000 0.00000 100% - 0s H 0 0 20.0000000 0.00000 100% - 0s 0 0 0.00000 0 23 20.00000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.00000 0 18 11.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s 0 0 0.00000 0 18 10.00000 0.00000 100% - 0s 0 0 0.00000 0 19 10.00000 0.00000 100% - 0s 0 0 0.00000 0 16 10.00000 0.00000 100% - 0s 0 0 0.00000 0 19 10.00000 0.00000 100% - 0s 0 0 0.00000 0 19 10.00000 0.00000 100% - 0s H 0 0 9.0000000 0.00000 100% - 0s 0 2 0.00000 0 14 9.00000 0.00000 100% - 0s H 272 142 8.0000000 0.00000 100% 8.9 0s H 326 174 7.0000000 0.00000 100% 10.1 0s H 354 123 5.0000000 0.00000 100% 10.1 0s * 404 70 11 4.0000000 1.00000 75.0% 16.0 0s Cutting planes: Cover: 281 Explored 479 nodes (13134 simplex iterations) in 0.26 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%