Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:41:33 2012 Optimize a model with 1 rows, 173 columns and 173 nonzeros Model has 165 quadratic objective terms Presolve removed 0 rows and 27 columns Presolve time: 0.00s Presolved: 166 rows, 311 columns, 641 nonzeros Variable types: 0 continuous, 311 integer (310 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 0.000000e+00, 201 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 41 44.00000 0.00000 100% - 0s H 0 0 36.0000000 0.00000 100% - 0s 0 0 0.00000 0 53 36.00000 0.00000 100% - 0s 0 0 0.00000 0 24 36.00000 0.00000 100% - 0s H 0 0 22.0000000 0.00000 100% - 0s 0 0 0.00000 0 30 22.00000 0.00000 100% - 0s 0 0 0.00000 0 30 22.00000 0.00000 100% - 0s 0 0 0.00000 0 25 22.00000 0.00000 100% - 0s H 0 0 20.0000000 0.00000 100% - 0s H 0 0 18.0000000 0.00000 100% - 0s 0 2 0.00000 0 25 18.00000 0.00000 100% - 0s H 54 54 17.0000000 0.00000 100% 1.6 0s H 81 70 16.0000000 0.00000 100% 3.1 0s H 135 100 14.0000000 0.00000 100% 3.3 0s H 297 204 13.0000000 0.00000 100% 5.9 0s H 378 231 11.0000000 0.00000 100% 7.2 0s H 517 251 9.0000000 0.00000 100% 8.2 0s H 583 223 8.0000000 0.00000 100% 8.9 0s H 626 180 7.0000000 1.00000 85.7% 11.1 0s Cutting planes: Cover: 310 MIR: 3 Zero half: 1 Explored 836 nodes (26780 simplex iterations) in 0.48 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%