Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:25:26 2012 Optimize a model with 1 rows, 146 columns and 146 nonzeros Model has 117 quadratic objective terms Presolve removed 0 rows and 29 columns Presolve time: 0.00s Presolved: 118 rows, 234 columns, 468 nonzeros Variable types: 0 continuous, 234 integer (233 binary) Found heuristic solution: objective 31.0000000 Root relaxation: objective 0.000000e+00, 144 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 33 31.00000 0.00000 100% - 0s 0 0 0.00000 0 23 31.00000 0.00000 100% - 0s H 0 0 18.0000000 0.00000 100% - 0s 0 0 0.00000 0 13 18.00000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s 0 0 0.00000 0 16 10.00000 0.00000 100% - 0s 0 0 0.00000 0 13 10.00000 0.00000 100% - 0s H 0 0 6.0000000 0.00000 100% - 0s 0 2 0.00000 0 13 6.00000 0.00000 100% - 0s * 139 38 35 5.0000000 0.00000 100% 2.1 0s H 429 140 4.0000000 0.00000 100% 7.2 0s * 456 89 28 3.0000000 0.00000 100% 7.2 0s * 557 16 6 2.0000000 1.00000 50.0% 12.8 0s Cutting planes: Cover: 212 Explored 578 nodes (8122 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%