Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:36:54 2012 Optimize a model with 1 rows, 168 columns and 168 nonzeros Model has 160 quadratic objective terms Presolve removed 0 rows and 25 columns Presolve time: 0.00s Presolved: 161 rows, 303 columns, 623 nonzeros Variable types: 0 continuous, 303 integer (302 binary) Found heuristic solution: objective 35.0000000 Root relaxation: objective 0.000000e+00, 195 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 36 35.00000 0.00000 100% - 0s 0 0 0.00000 0 37 35.00000 0.00000 100% - 0s H 0 0 30.0000000 0.00000 100% - 0s 0 0 0.00000 0 25 30.00000 0.00000 100% - 0s H 0 0 20.0000000 0.00000 100% - 0s 0 0 0.00000 0 15 20.00000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s 0 0 0.00000 0 23 14.00000 0.00000 100% - 0s 0 0 0.00000 0 23 14.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 2 0.00000 0 22 12.00000 0.00000 100% - 0s H 27 27 11.0000000 0.00000 100% 2.4 0s H 54 44 10.0000000 0.00000 100% 2.5 0s H 260 149 8.0000000 0.00000 100% 7.1 0s H 564 85 7.0000000 3.66667 47.6% 29.4 0s Cutting planes: Cover: 292 Explored 652 nodes (20686 simplex iterations) in 0.39 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%