Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:40:44 2012 Optimize a model with 1 rows, 172 columns and 172 nonzeros Model has 163 quadratic objective terms Presolve removed 0 rows and 22 columns Presolve time: 0.00s Presolved: 164 rows, 313 columns, 639 nonzeros Variable types: 0 continuous, 313 integer (312 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 0.000000e+00, 200 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 46.00000 0.00000 100% - 0s H 0 0 36.0000000 0.00000 100% - 0s 0 0 0.00000 0 34 36.00000 0.00000 100% - 0s H 0 0 33.0000000 0.00000 100% - 0s 0 0 0.00000 0 34 33.00000 0.00000 100% - 0s 0 0 0.00000 0 29 33.00000 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 22.0000000 0.00000 100% - 0s 0 2 0.00000 0 29 22.00000 0.00000 100% - 0s H 27 27 20.0000000 0.00000 100% 2.0 0s H 104 92 17.0000000 0.00000 100% 2.2 0s * 123 104 40 16.0000000 0.00000 100% 2.0 0s * 128 96 40 15.0000000 0.00000 100% 2.0 0s H 189 120 12.0000000 0.00000 100% 4.0 0s H 326 173 9.0000000 0.00000 100% 5.4 0s H 473 80 5.0000000 0.00000 100% 8.3 0s H 484 57 4.0000000 0.00000 100% 8.2 0s Cutting planes: Cover: 286 Explored 543 nodes (9997 simplex iterations) in 0.20 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%