Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:42:02 2012 Optimize a model with 1 rows, 174 columns and 174 nonzeros Model has 159 quadratic objective terms Presolve removed 0 rows and 26 columns Presolve time: 0.00s Presolved: 160 rows, 307 columns, 625 nonzeros Variable types: 0 continuous, 307 integer (306 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 0.000000e+00, 194 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 49 44.00000 0.00000 100% - 0s 0 0 0.00000 0 44 44.00000 0.00000 100% - 0s H 0 0 32.0000000 0.00000 100% - 0s 0 0 0.00000 0 27 32.00000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s H 0 0 19.0000000 0.00000 100% - 0s 0 0 0.00000 0 27 19.00000 0.00000 100% - 0s H 0 0 16.0000000 0.00000 100% - 0s 0 0 0.00000 0 49 16.00000 0.00000 100% - 0s 0 0 0.00000 0 49 16.00000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s 0 2 0.00000 0 24 14.00000 0.00000 100% - 0s H 136 77 11.0000000 0.00000 100% 4.0 0s H 325 198 10.0000000 0.00000 100% 7.2 0s * 331 184 39 9.0000000 0.00000 100% 7.1 0s H 470 172 6.0000000 0.00000 100% 8.2 0s H 488 142 5.0000000 0.00000 100% 8.3 0s * 586 88 13 4.0000000 1.00000 75.0% 12.5 0s Cutting planes: Cover: 298 Explored 675 nodes (14578 simplex iterations) in 0.28 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%