Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:28:16 2012 Optimize a model with 1 rows, 155 columns and 155 nonzeros Model has 120 quadratic objective terms Presolve removed 0 rows and 37 columns Presolve time: 0.00s Presolved: 121 rows, 238 columns, 478 nonzeros Variable types: 0 continuous, 238 integer (237 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 0.000000e+00, 140 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 30 30.00000 0.00000 100% - 0s 0 0 0.00000 0 21 30.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s 0 0 0.00000 0 16 15.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s H 0 0 9.0000000 0.00000 100% - 0s 0 0 0.00000 0 24 9.00000 0.00000 100% - 0s 0 0 0.00000 0 21 9.00000 0.00000 100% - 0s 0 0 0.00000 0 19 9.00000 0.00000 100% - 0s 0 0 0.00000 0 16 9.00000 0.00000 100% - 0s 0 0 0.00000 0 15 9.00000 0.00000 100% - 0s 0 0 0.00000 0 16 9.00000 0.00000 100% - 0s 0 0 0.00000 0 20 9.00000 0.00000 100% - 0s 0 0 0.00000 0 13 9.00000 0.00000 100% - 0s 0 2 0.00000 0 13 9.00000 0.00000 100% - 0s H 297 170 7.0000000 0.00000 100% 5.4 0s H 324 173 6.0000000 0.00000 100% 5.1 0s H 405 187 5.0000000 0.00000 100% 5.8 0s * 481 152 12 4.0000000 0.00000 100% 6.7 0s * 486 95 13 3.0000000 0.00000 100% 6.7 0s * 503 36 8 2.0000000 0.00000 100% 7.6 0s Cutting planes: Cover: 219 Explored 563 nodes (6997 simplex iterations) in 0.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+00, best bound 2.000000000000e+00, gap 0.0%