Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:44:32 2012 Optimize a model with 1 rows, 177 columns and 177 nonzeros Model has 174 quadratic objective terms Presolve removed 0 rows and 28 columns Presolve time: 0.00s Presolved: 175 rows, 323 columns, 671 nonzeros Variable types: 0 continuous, 323 integer (322 binary) Found heuristic solution: objective 53.0000000 Root relaxation: objective 0.000000e+00, 218 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 43 53.00000 0.00000 100% - 0s H 0 0 38.0000000 0.00000 100% - 0s 0 0 0.00000 0 41 38.00000 0.00000 100% - 0s H 0 0 35.0000000 0.00000 100% - 0s 0 0 0.00000 0 41 35.00000 0.00000 100% - 0s 0 0 0.00000 0 28 35.00000 0.00000 100% - 0s H 0 0 24.0000000 0.00000 100% - 0s H 0 0 23.0000000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s 0 2 0.00000 0 26 21.00000 0.00000 100% - 0s H 54 54 20.0000000 0.00000 100% 1.9 0s H 81 64 17.0000000 0.00000 100% 3.1 0s H 349 231 13.0000000 0.00000 100% 6.3 0s H 455 235 11.0000000 0.00000 100% 9.2 0s * 589 266 18 10.0000000 1.00000 90.0% 12.3 0s H 649 229 9.0000000 1.00000 88.9% 14.2 0s * 772 167 17 8.0000000 2.56757 67.9% 25.5 0s Cutting planes: Cover: 337 Explored 948 nodes (38766 simplex iterations) in 0.75 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%