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 128 quadratic objective terms Presolve removed 0 rows and 27 columns Presolve time: 0.00s Presolved: 129 rows, 256 columns, 512 nonzeros Variable types: 0 continuous, 256 integer (255 binary) Found heuristic solution: objective 36.0000000 Root relaxation: objective 0.000000e+00, 155 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 34 36.00000 0.00000 100% - 0s H 0 0 29.0000000 0.00000 100% - 0s 0 0 0.00000 0 21 29.00000 0.00000 100% - 0s H 0 0 18.0000000 0.00000 100% - 0s 0 0 0.00000 0 14 18.00000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s 0 0 0.00000 0 16 13.00000 0.00000 100% - 0s 0 0 0.00000 0 16 13.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s 0 2 0.00000 0 14 10.00000 0.00000 100% - 0s H 27 27 8.0000000 0.00000 100% 4.3 0s H 54 30 7.0000000 0.00000 100% 4.0 0s H 75 49 6.0000000 0.00000 100% 3.7 0s * 100 48 28 5.0000000 0.00000 100% 3.2 0s H 321 94 4.0000000 0.00000 100% 6.9 0s * 425 95 19 3.0000000 0.00000 100% 9.8 0s Cutting planes: Cover: 229 Explored 573 nodes (11429 simplex iterations) in 0.21 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%