Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:42:39 2012 Optimize a model with 1 rows, 175 columns and 175 nonzeros Model has 145 quadratic objective terms Presolve removed 0 rows and 33 columns Presolve time: 0.00s Presolved: 146 rows, 287 columns, 577 nonzeros Variable types: 0 continuous, 287 integer (286 binary) Found heuristic solution: objective 39.0000000 Root relaxation: objective 0.000000e+00, 173 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 43 39.00000 0.00000 100% - 0s 0 0 0.00000 0 30 39.00000 0.00000 100% - 0s H 0 0 30.0000000 0.00000 100% - 0s 0 0 0.00000 0 27 30.00000 0.00000 100% - 0s H 0 0 21.0000000 0.00000 100% - 0s 0 0 0.00000 0 24 21.00000 0.00000 100% - 0s H 0 0 18.0000000 0.00000 100% - 0s 0 0 0.00000 0 17 18.00000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s 0 0 0.00000 0 22 12.00000 0.00000 100% - 0s 0 0 0.00000 0 20 12.00000 0.00000 100% - 0s 0 2 0.00000 0 20 12.00000 0.00000 100% - 0s H 20 20 7.0000000 0.00000 100% 2.1 0s H 254 59 5.0000000 0.00000 100% 4.0 0s * 259 45 20 4.0000000 0.00000 100% 4.0 0s * 539 67 11 3.0000000 0.68182 77.3% 9.2 0s Cutting planes: Cover: 269 Explored 610 nodes (9475 simplex iterations) in 0.20 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%