Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:44:33 2012 Optimize a model with 1 rows, 177 columns and 177 nonzeros Model has 173 quadratic objective terms Presolve removed 0 rows and 25 columns Presolve time: 0.00s Presolved: 174 rows, 325 columns, 671 nonzeros Variable types: 0 continuous, 325 integer (324 binary) Found heuristic solution: objective 53.0000000 Root relaxation: objective 0.000000e+00, 223 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 52 53.00000 0.00000 100% - 0s H 0 0 45.0000000 0.00000 100% - 0s 0 0 0.00000 0 42 45.00000 0.00000 100% - 0s H 0 0 37.0000000 0.00000 100% - 0s H 0 0 36.0000000 0.00000 100% - 0s 0 0 0.00000 0 44 36.00000 0.00000 100% - 0s H 0 0 27.0000000 0.00000 100% - 0s H 0 0 20.0000000 0.00000 100% - 0s 0 0 0.00000 0 28 20.00000 0.00000 100% - 0s 0 0 0.00000 0 22 20.00000 0.00000 100% - 0s 0 0 0.00000 0 31 20.00000 0.00000 100% - 0s 0 0 0.00000 0 24 20.00000 0.00000 100% - 0s H 0 0 18.0000000 0.00000 100% - 0s 0 0 0.00000 0 21 18.00000 0.00000 100% - 0s 0 0 0.00000 0 25 18.00000 0.00000 100% - 0s 0 0 0.00000 0 22 18.00000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s 0 2 0.00000 0 22 14.00000 0.00000 100% - 0s H 27 27 13.0000000 0.00000 100% 2.0 0s H 54 46 12.0000000 0.00000 100% 3.4 0s H 109 84 11.0000000 0.00000 100% 3.3 0s H 381 232 10.0000000 0.00000 100% 6.8 0s H 396 207 9.0000000 0.00000 100% 7.1 0s H 462 198 8.0000000 0.00000 100% 8.9 0s * 515 143 14 7.0000000 1.00000 85.7% 16.1 0s Cutting planes: Cover: 311 Explored 694 nodes (22575 simplex iterations) in 0.45 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%