Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:27:06 2012 Optimize a model with 4299 rows, 1892 columns and 14575 nonzeros Presolve removed 1077 rows and 2 columns Presolve time: 0.11s Presolved: 3222 rows, 1890 columns, 11845 nonzeros Variable types: 0 continuous, 1890 integer (1890 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 3.000000e+00, 2819 iterations, 0.23 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 90 43.00000 3.00000 93.0% - 1s H 0 0 42.0000000 3.00000 92.9% - 1s H 0 0 7.0000000 3.00000 57.1% - 1s H 0 0 5.0000000 3.00000 40.0% - 1s 0 0 3.00000 0 94 5.00000 3.00000 40.0% - 1s H 0 0 4.0000000 3.00000 25.0% - 1s 0 0 3.00000 0 85 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 48 4.00000 3.00000 25.0% - 3s 0 0 3.00000 0 71 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 58 4.00000 3.00000 25.0% - 5s 0 0 3.00000 0 93 4.00000 3.00000 25.0% - 6s 0 0 3.00000 0 52 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 84 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 56 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 60 4.00000 3.00000 25.0% - 10s 0 0 3.00000 0 60 4.00000 3.00000 25.0% - 10s 0 2 3.00000 0 60 4.00000 3.00000 25.0% - 11s 4 4 3.00000 1 782 4.00000 3.00000 25.0% 980 15s 8 7 3.00000 1 81 4.00000 3.00000 25.0% 490 20s 12 12 3.00000 16 349 4.00000 3.00000 25.0% 4895 30s Cutting planes: Gomory: 3 Zero half: 12 Explored 25 nodes (139781 simplex iterations) in 32.94 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%