Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:27:48 2012 Optimize a model with 1 rows, 154 columns and 154 nonzeros Model has 120 quadratic objective terms Presolve removed 0 rows and 26 columns Presolve time: 0.00s Presolved: 121 rows, 248 columns, 488 nonzeros Variable types: 0 continuous, 248 integer (247 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 0.000000e+00, 147 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 31 29.00000 0.00000 100% - 0s 0 0 0.00000 0 20 29.00000 0.00000 100% - 0s H 0 0 19.0000000 0.00000 100% - 0s 0 0 0.00000 0 16 19.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s H 0 0 9.0000000 0.00000 100% - 0s H 0 0 8.0000000 0.00000 100% - 0s 0 0 0.00000 0 9 8.00000 0.00000 100% - 0s 0 0 0.00000 0 13 8.00000 0.00000 100% - 0s 0 0 0.00000 0 15 8.00000 0.00000 100% - 0s 0 0 0.00000 0 15 8.00000 0.00000 100% - 0s 0 2 0.00000 0 15 8.00000 0.00000 100% - 0s H 27 27 6.0000000 0.00000 100% 4.5 0s H 119 30 4.0000000 0.00000 100% 4.6 0s * 136 29 11 3.0000000 0.00000 100% 4.5 0s * 294 47 18 2.0000000 0.00000 100% 6.7 0s Cutting planes: Cover: 201 Explored 374 nodes (4560 simplex iterations) in 0.10 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+00, best bound 2.000000000000e+00, gap 0.0%