Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:37:17 2012 Optimize a model with 1 rows, 169 columns and 169 nonzeros Model has 144 quadratic objective terms Presolve removed 0 rows and 26 columns Presolve time: 0.00s Presolved: 145 rows, 287 columns, 575 nonzeros Variable types: 0 continuous, 287 integer (286 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 0.000000e+00, 185 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 41 43.00000 0.00000 100% - 0s H 0 0 33.0000000 0.00000 100% - 0s 0 0 0.00000 0 25 33.00000 0.00000 100% - 0s H 0 0 23.0000000 0.00000 100% - 0s H 0 0 20.0000000 0.00000 100% - 0s 0 0 0.00000 0 28 20.00000 0.00000 100% - 0s 0 0 0.00000 0 23 20.00000 0.00000 100% - 0s 0 0 0.00000 0 8 20.00000 0.00000 100% - 0s H 0 0 8.0000000 0.00000 100% - 0s 0 0 0.00000 0 11 8.00000 0.00000 100% - 0s H 0 0 7.0000000 0.00000 100% - 0s 0 0 0.00000 0 13 7.00000 0.00000 100% - 0s 0 0 0.00000 0 13 7.00000 0.00000 100% - 0s 0 2 0.00000 0 11 7.00000 0.00000 100% - 0s H 55 37 6.0000000 0.00000 100% 1.9 0s H 82 46 5.0000000 0.00000 100% 2.5 0s * 527 172 19 4.0000000 0.00000 100% 10.1 0s * 535 98 14 3.0000000 0.00000 100% 10.1 0s Cutting planes: Cover: 252 MIR: 3 Zero half: 1 Explored 638 nodes (12037 simplex iterations) in 0.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%