Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:27:48 2012 Optimize a model with 1 rows, 154 columns and 154 nonzeros Model has 132 quadratic objective terms Presolve removed 0 rows and 25 columns Presolve time: 0.00s Presolved: 133 rows, 261 columns, 525 nonzeros Variable types: 0 continuous, 261 integer (260 binary) Found heuristic solution: objective 38.0000000 Root relaxation: objective 0.000000e+00, 168 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 40 38.00000 0.00000 100% - 0s 0 0 0.00000 0 25 38.00000 0.00000 100% - 0s H 0 0 20.0000000 0.00000 100% - 0s 0 0 0.00000 0 32 20.00000 0.00000 100% - 0s H 0 0 19.0000000 0.00000 100% - 0s 0 0 0.00000 0 25 19.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s 0 0 0.00000 0 14 17.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.00000 0 16 11.00000 0.00000 100% - 0s 0 0 0.00000 0 16 11.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s H 0 0 7.0000000 0.00000 100% - 0s 0 2 0.00000 0 16 7.00000 0.00000 100% - 0s H 28 26 6.0000000 0.00000 100% 1.6 0s H 246 138 5.0000000 0.00000 100% 6.6 0s * 461 181 10 4.0000000 0.00000 100% 9.9 0s Cutting planes: Cover: 241 Explored 688 nodes (22835 simplex iterations) in 0.36 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%