Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:37:19 2012 Optimize a model with 1 rows, 169 columns and 169 nonzeros Model has 131 quadratic objective terms Presolve removed 0 rows and 39 columns Presolve time: 0.00s Presolved: 132 rows, 261 columns, 523 nonzeros Variable types: 0 continuous, 261 integer (260 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 0.000000e+00, 159 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 31 28.00000 0.00000 100% - 0s 0 0 0.00000 0 21 28.00000 0.00000 100% - 0s H 0 0 19.0000000 0.00000 100% - 0s H 0 0 16.0000000 0.00000 100% - 0s 0 0 0.00000 0 13 16.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s H 0 0 9.0000000 0.00000 100% - 0s 0 0 0.00000 0 13 9.00000 0.00000 100% - 0s 0 0 0.00000 0 10 9.00000 0.00000 100% - 0s H 0 0 7.0000000 0.00000 100% - 0s 0 2 0.00000 0 10 7.00000 0.00000 100% - 0s H 92 57 6.0000000 0.00000 100% 3.0 0s H 98 44 4.0000000 0.00000 100% 3.1 0s H 104 38 3.0000000 0.00000 100% 3.1 0s * 105 28 11 2.0000000 0.00000 100% 3.1 0s Cutting planes: Cover: 227 Explored 469 nodes (7498 simplex iterations) in 0.14 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%