Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:27:10 2012 Optimize a model with 1 rows, 152 columns and 152 nonzeros Model has 122 quadratic objective terms Presolve removed 0 rows and 25 columns Presolve time: 0.00s Presolved: 123 rows, 249 columns, 493 nonzeros Variable types: 0 continuous, 249 integer (248 binary) Found heuristic solution: objective 36.0000000 Root relaxation: objective 0.000000e+00, 152 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 36.00000 0.00000 100% - 0s H 0 0 31.0000000 0.00000 100% - 0s 0 0 0.00000 0 20 31.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s 0 0 0.00000 0 20 17.00000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s 0 0 0.00000 0 15 14.00000 0.00000 100% - 0s 0 0 0.00000 0 15 14.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s H 0 0 8.0000000 0.00000 100% - 0s 0 0 0.00000 0 13 8.00000 0.00000 100% - 0s H 0 0 6.0000000 0.00000 100% - 0s 0 0 0.00000 0 13 6.00000 0.00000 100% - 0s 0 0 0.00000 0 18 6.00000 0.00000 100% - 0s 0 0 0.00000 0 18 6.00000 0.00000 100% - 0s H 0 0 5.0000000 0.00000 100% - 0s 0 2 0.00000 0 14 5.00000 0.00000 100% - 0s H 28 13 4.0000000 0.00000 100% 2.1 0s H 110 34 3.0000000 0.00000 100% 3.7 0s * 347 34 11 2.0000000 0.75000 62.5% 10.7 0s Cutting planes: Cover: 201 Explored 382 nodes (5500 simplex iterations) in 0.13 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%