Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:29:16 2012 Optimize a model with 1 rows, 158 columns and 158 nonzeros Model has 145 quadratic objective terms Presolve removed 0 rows and 27 columns Presolve time: 0.00s Presolved: 146 rows, 276 columns, 566 nonzeros Variable types: 0 continuous, 276 integer (275 binary) Found heuristic solution: objective 42.0000000 Root relaxation: objective 0.000000e+00, 176 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 39 42.00000 0.00000 100% - 0s H 0 0 37.0000000 0.00000 100% - 0s 0 0 0.00000 0 28 37.00000 0.00000 100% - 0s H 0 0 26.0000000 0.00000 100% - 0s 0 0 0.00000 0 33 26.00000 0.00000 100% - 0s H 0 0 23.0000000 0.00000 100% - 0s 0 0 0.00000 0 30 23.00000 0.00000 100% - 0s H 0 0 19.0000000 0.00000 100% - 0s 0 0 0.00000 0 22 19.00000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s 0 0 0.00000 0 22 15.00000 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 20 14.00000 0.00000 100% - 0s 0 0 0.00000 0 15 14.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 0 0.00000 0 25 12.00000 0.00000 100% - 0s 0 0 0.00000 0 25 12.00000 0.00000 100% - 0s 0 2 0.00000 0 25 12.00000 0.00000 100% - 0s H 27 27 9.0000000 0.00000 100% 2.4 0s H 54 44 8.0000000 0.00000 100% 2.0 0s H 298 184 7.0000000 0.00000 100% 5.9 0s Cutting planes: Cover: 280 Explored 799 nodes (31148 simplex iterations) in 0.52 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%