Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:28:35 2012 Optimize a model with 1 rows, 156 columns and 156 nonzeros Model has 127 quadratic objective terms Presolve removed 0 rows and 22 columns Presolve time: 0.00s Presolved: 128 rows, 261 columns, 515 nonzeros Variable types: 0 continuous, 261 integer (260 binary) Found heuristic solution: objective 39.0000000 Root relaxation: objective 0.000000e+00, 155 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 45 39.00000 0.00000 100% - 0s 0 0 0.00000 0 17 39.00000 0.00000 100% - 0s H 0 0 16.0000000 0.00000 100% - 0s 0 0 0.00000 0 14 16.00000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.00000 0 23 11.00000 0.00000 100% - 0s 0 0 0.00000 0 11 11.00000 0.00000 100% - 0s H 0 0 5.0000000 0.00000 100% - 0s 0 0 0.00000 0 10 5.00000 0.00000 100% - 0s 0 0 0.00000 0 9 5.00000 0.00000 100% - 0s 0 0 0.00000 0 10 5.00000 0.00000 100% - 0s 0 0 0.00000 0 13 5.00000 0.00000 100% - 0s 0 0 0.00000 0 13 5.00000 0.00000 100% - 0s H 0 0 3.0000000 0.00000 100% - 0s 0 2 0.00000 0 3 3.00000 0.00000 100% - 0s H 378 53 2.0000000 0.00000 100% 5.4 0s Cutting planes: Cover: 217 Explored 448 nodes (5179 simplex iterations) in 0.12 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%