Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:25:27 2012 Optimize a model with 1 rows, 146 columns and 146 nonzeros Model has 128 quadratic objective terms Presolve removed 0 rows and 26 columns Presolve time: 0.00s Presolved: 129 rows, 248 columns, 504 nonzeros Variable types: 0 continuous, 248 integer (247 binary) Found heuristic solution: objective 37.0000000 Root relaxation: objective 0.000000e+00, 158 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 35 37.00000 0.00000 100% - 0s H 0 0 32.0000000 0.00000 100% - 0s 0 0 0.00000 0 22 32.00000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s 0 0 0.00000 0 40 15.00000 0.00000 100% - 0s 0 0 0.00000 0 20 15.00000 0.00000 100% - 0s 0 0 0.00000 0 17 15.00000 0.00000 100% - 0s 0 0 0.00000 0 18 15.00000 0.00000 100% - 0s 0 0 0.00000 0 15 15.00000 0.00000 100% - 0s 0 0 0.00000 0 19 15.00000 0.00000 100% - 0s 0 0 0.00000 0 19 15.00000 0.00000 100% - 0s 0 2 0.00000 0 19 15.00000 0.00000 100% - 0s H 92 68 13.0000000 0.00000 100% 1.9 0s H 108 64 12.0000000 0.00000 100% 2.2 0s H 135 82 10.0000000 0.00000 100% 2.2 0s H 159 95 9.0000000 0.00000 100% 2.6 0s H 367 103 5.0000000 0.00000 100% 7.3 0s H 385 81 4.0000000 0.00000 100% 8.2 0s Cutting planes: Cover: 236 MIR: 1 Explored 490 nodes (9840 simplex iterations) in 0.19 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%