Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:34:24 2012 Optimize a model with 1 rows, 162 columns and 162 nonzeros Model has 143 quadratic objective terms Presolve removed 0 rows and 27 columns Presolve time: 0.00s Presolved: 144 rows, 278 columns, 564 nonzeros Variable types: 0 continuous, 278 integer (277 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 0.000000e+00, 172 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 40 44.00000 0.00000 100% - 0s H 0 0 37.0000000 0.00000 100% - 0s 0 0 0.00000 0 27 37.00000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s 0 0 0.00000 0 27 21.00000 0.00000 100% - 0s 0 0 0.00000 0 20 21.00000 0.00000 100% - 0s H 0 0 16.0000000 0.00000 100% - 0s 0 0 0.00000 0 11 16.00000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.00000 0 12 11.00000 0.00000 100% - 0s H 0 0 8.0000000 0.00000 100% - 0s 0 0 0.00000 0 12 8.00000 0.00000 100% - 0s 0 0 0.00000 0 11 8.00000 0.00000 100% - 0s H 0 0 6.0000000 0.00000 100% - 0s 0 2 0.00000 0 11 6.00000 0.00000 100% - 0s H 460 186 5.0000000 0.00000 100% 6.2 0s * 535 161 24 4.0000000 0.00000 100% 8.0 0s * 545 108 13 3.0000000 0.00000 100% 9.0 0s * 592 43 23 2.0000000 1.00000 50.0% 10.4 0s Cutting planes: Cover: 245 Explored 639 nodes (8850 simplex iterations) in 0.19 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%