Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:39:57 2012 Optimize a model with 1 rows, 171 columns and 171 nonzeros Model has 150 quadratic objective terms Presolve removed 0 rows and 23 columns Presolve time: 0.00s Presolved: 151 rows, 298 columns, 598 nonzeros Variable types: 0 continuous, 298 integer (297 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 0.000000e+00, 186 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 28 50.00000 0.00000 100% - 0s H 0 0 26.0000000 0.00000 100% - 0s 0 0 0.00000 0 27 26.00000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s 0 0 0.00000 0 16 21.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s 0 0 0.00000 0 8 13.00000 0.00000 100% - 0s H 0 0 8.0000000 0.00000 100% - 0s 0 0 0.00000 0 21 8.00000 0.00000 100% - 0s 0 0 0.00000 0 20 8.00000 0.00000 100% - 0s H 0 0 7.0000000 0.00000 100% - 0s 0 0 0.00000 0 19 7.00000 0.00000 100% - 0s 0 0 0.00000 0 10 7.00000 0.00000 100% - 0s 0 0 0.00000 0 10 7.00000 0.00000 100% - 0s 0 0 0.00000 0 10 7.00000 0.00000 100% - 0s 0 2 0.00000 0 10 7.00000 0.00000 100% - 0s H 136 58 6.0000000 0.00000 100% 3.7 0s H 217 94 4.0000000 0.00000 100% 5.9 0s * 359 73 9 3.0000000 0.00000 100% 14.0 0s Cutting planes: Cover: 258 Explored 441 nodes (12191 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%