Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:36:30 2012 Optimize a model with 1 rows, 167 columns and 167 nonzeros Model has 139 quadratic objective terms Presolve removed 0 rows and 26 columns Presolve time: 0.00s Presolved: 140 rows, 280 columns, 558 nonzeros Variable types: 0 continuous, 280 integer (279 binary) Found heuristic solution: objective 40.0000000 Root relaxation: objective 0.000000e+00, 177 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 15 40.00000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s 0 0 0.00000 0 19 15.00000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.00000 0 16 11.00000 0.00000 100% - 0s H 0 0 9.0000000 0.00000 100% - 0s 0 0 0.00000 0 15 9.00000 0.00000 100% - 0s 0 0 0.00000 0 17 9.00000 0.00000 100% - 0s 0 0 0.00000 0 14 9.00000 0.00000 100% - 0s 0 0 0.00000 0 13 9.00000 0.00000 100% - 0s 0 0 0.00000 0 16 9.00000 0.00000 100% - 0s 0 0 0.00000 0 16 9.00000 0.00000 100% - 0s 0 2 0.00000 0 16 9.00000 0.00000 100% - 0s H 54 21 8.0000000 0.00000 100% 1.5 0s H 108 34 5.0000000 0.00000 100% 1.7 0s H 162 54 4.0000000 0.00000 100% 2.7 0s H 325 52 3.0000000 0.00000 100% 4.3 0s * 483 40 14 2.0000000 0.00000 100% 7.5 0s Cutting planes: Cover: 231 Explored 526 nodes (5928 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%