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 147 quadratic objective terms Presolve removed 0 rows and 29 columns Presolve time: 0.00s Presolved: 148 rows, 287 columns, 581 nonzeros Variable types: 0 continuous, 287 integer (286 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 0.000000e+00, 177 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 45 43.00000 0.00000 100% - 0s 0 0 0.00000 0 32 43.00000 0.00000 100% - 0s H 0 0 27.0000000 0.00000 100% - 0s H 0 0 25.0000000 0.00000 100% - 0s 0 0 0.00000 0 58 25.00000 0.00000 100% - 0s 0 0 0.00000 0 21 25.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s 0 0 0.00000 0 23 17.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 0 0.00000 0 19 12.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s 0 0 0.00000 0 25 10.00000 0.00000 100% - 0s 0 0 0.00000 0 25 10.00000 0.00000 100% - 0s 0 2 0.00000 0 25 10.00000 0.00000 100% - 0s H 423 240 9.0000000 0.00000 100% 8.7 0s * 498 231 23 8.0000000 0.00000 100% 10.6 0s * 571 197 11 7.0000000 1.00000 85.7% 13.2 0s * 600 150 10 6.0000000 1.00000 83.3% 15.8 0s Cutting planes: Cover: 276 MIR: 3 Zero half: 1 Explored 844 nodes (22991 simplex iterations) in 0.45 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%