Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:25:42 2012 Optimize a model with 1 rows, 147 columns and 147 nonzeros Model has 124 quadratic objective terms Presolve removed 0 rows and 29 columns Presolve time: 0.00s Presolved: 125 rows, 242 columns, 490 nonzeros Variable types: 0 continuous, 242 integer (241 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 0.000000e+00, 146 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 27 30.00000 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 13 21.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 0 0.00000 0 16 12.00000 0.00000 100% - 0s 0 0 0.00000 0 16 12.00000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 2 0.00000 0 16 11.00000 0.00000 100% - 0s H 27 27 10.0000000 0.00000 100% 3.0 0s H 137 48 7.0000000 0.00000 100% 2.4 0s H 461 182 6.0000000 0.00000 100% 6.1 0s H 518 160 5.0000000 0.00000 100% 7.8 0s Cutting planes: Cover: 231 Explored 717 nodes (12819 simplex iterations) in 0.25 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.000000000000e+00, best bound 5.000000000000e+00, gap 0.0%