Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:43:46 2012 Optimize a model with 1 rows, 176 columns and 176 nonzeros Model has 162 quadratic objective terms Presolve removed 0 rows and 20 columns Presolve time: 0.00s Presolved: 163 rows, 318 columns, 642 nonzeros Variable types: 0 continuous, 318 integer (317 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 0.000000e+00, 205 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 25 51.00000 0.00000 100% - 0s H 0 0 25.0000000 0.00000 100% - 0s 0 0 0.00000 0 31 25.00000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s 0 0 0.00000 0 28 21.00000 0.00000 100% - 0s 0 0 0.00000 0 26 21.00000 0.00000 100% - 0s 0 0 0.00000 0 21 21.00000 0.00000 100% - 0s H 0 0 16.0000000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s 0 0 0.00000 0 18 15.00000 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 H 0 0 9.0000000 0.00000 100% - 0s 0 0 0.00000 0 15 9.00000 0.00000 100% - 0s 0 0 0.00000 0 13 9.00000 0.00000 100% - 0s H 0 0 8.0000000 0.00000 100% - 0s 0 0 0.00000 0 19 8.00000 0.00000 100% - 0s 0 0 0.00000 0 14 8.00000 0.00000 100% - 0s 0 0 0.00000 0 14 8.00000 0.00000 100% - 0s 0 0 0.00000 0 18 8.00000 0.00000 100% - 0s 0 0 0.00000 0 18 8.00000 0.00000 100% - 0s 0 2 0.00000 0 18 8.00000 0.00000 100% - 0s H 189 88 7.0000000 0.00000 100% 4.5 0s H 351 117 5.0000000 0.00000 100% 6.6 0s H 351 88 4.0000000 0.00000 100% 6.6 0s Cutting planes: Cover: 299 Explored 613 nodes (18956 simplex iterations) in 0.37 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%