Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:14:40 2012 Optimize a model with 12200 rows, 3782 columns and 40138 nonzeros Presolve time: 0.09s Presolved: 12200 rows, 3782 columns, 40378 nonzeros Variable types: 0 continuous, 3782 integer (3782 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 2.000000e+00, 3527 iterations, 0.12 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 122 44.00000 2.00000 95.5% - 0s H 0 0 12.0000000 2.00000 83.3% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.00000 0 122 5.00000 2.00000 60.0% - 1s 0 0 2.00000 0 122 5.00000 2.00000 60.0% - 6s 0 0 2.00000 0 122 5.00000 2.00000 60.0% - 11s 0 0 2.00000 0 122 5.00000 2.00000 60.0% - 17s H 0 0 4.0000000 2.00000 50.0% - 18s 0 0 2.00000 0 122 4.00000 2.00000 50.0% - 23s 0 0 2.00000 0 122 4.00000 2.00000 50.0% - 27s 0 2 2.00000 0 122 4.00000 2.00000 50.0% - 47s 1 3 3.00000 1 718 4.00000 2.00000 50.0% 23184 54s 2 4 3.00000 1 555 4.00000 3.00000 25.0% 19684 61s 36 4 3.00000 3 577 4.00000 3.00000 25.0% 1583 65s 52 6 cutoff 10 4.00000 3.00000 25.0% 1542 70s 57 3 3.00000 2 323 4.00000 3.00000 25.0% 1751 75s 78 0 cutoff 7 4.00000 4.00000 0.0% 1601 80s Cutting planes: Clique: 164 Explored 79 nodes (195893 simplex iterations) in 80.20 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%