Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:35:36 2012 Optimize a model with 9322 rows, 3540 columns and 31270 nonzeros Presolve time: 0.08s Presolved: 9322 rows, 3540 columns, 31648 nonzeros Variable types: 0 continuous, 3540 integer (3540 binary) Found heuristic solution: objective 35.0000000 Root relaxation: objective 2.000000e+00, 3201 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 118 35.00000 2.00000 94.3% - 0s H 0 0 10.0000000 2.00000 80.0% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.00000 0 118 5.00000 2.00000 60.0% - 1s 0 0 2.00000 0 118 5.00000 2.00000 60.0% - 4s H 0 0 4.0000000 2.00000 50.0% - 4s 0 0 2.00000 0 118 4.00000 2.00000 50.0% - 7s 0 0 2.00000 0 118 4.00000 2.00000 50.0% - 11s 0 0 2.00000 0 118 4.00000 2.00000 50.0% - 14s 0 0 2.00000 0 118 4.00000 2.00000 50.0% - 18s 0 2 2.00000 0 118 4.00000 2.00000 50.0% - 26s 1 3 3.00000 1 575 4.00000 2.00000 50.0% 20427 31s 2 4 3.00000 1 521 4.00000 3.00000 25.0% 28789 43s 5 5 3.00000 2 361 4.00000 3.00000 25.0% 12157 45s 68 4 cutoff 6 4.00000 3.00000 25.0% 1383 50s 89 5 cutoff 8 4.00000 3.00000 25.0% 1330 55s 154 4 cutoff 7 4.00000 3.00000 25.0% 978 60s Cutting planes: Gomory: 1 Clique: 136 Explored 167 nodes (214949 simplex iterations) in 60.30 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%