Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:28:06 2012 Optimize a model with 4858 rows, 1892 columns and 16252 nonzeros Presolve removed 1421 rows and 2 columns Presolve time: 0.11s Presolved: 3437 rows, 1890 columns, 12781 nonzeros Variable types: 0 continuous, 1890 integer (1890 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 3.000000e+00, 3501 iterations, 0.36 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 103 43.00000 3.00000 93.0% - 1s H 0 0 25.0000000 3.00000 88.0% - 1s H 0 0 12.0000000 3.00000 75.0% - 1s H 0 0 6.0000000 3.00000 50.0% - 1s 0 0 3.00000 0 514 6.00000 3.00000 50.0% - 2s H 0 0 5.0000000 3.00000 40.0% - 2s 0 0 3.00000 0 90 5.00000 3.00000 40.0% - 3s H 0 0 4.0000000 3.00000 25.0% - 3s 0 0 3.00000 0 371 4.00000 3.00000 25.0% - 4s 0 0 3.00000 0 90 4.00000 3.00000 25.0% - 7s 0 0 3.00000 0 114 4.00000 3.00000 25.0% - 8s 0 0 3.00000 0 95 4.00000 3.00000 25.0% - 9s 0 0 3.00000 0 977 4.00000 3.00000 25.0% - 11s 0 0 3.00000 0 88 4.00000 3.00000 25.0% - 12s 0 0 3.00000 0 99 4.00000 3.00000 25.0% - 14s 0 0 3.00000 0 99 4.00000 3.00000 25.0% - 15s 0 2 3.00000 0 95 4.00000 3.00000 25.0% - 17s 4 4 3.00000 1 104 4.00000 3.00000 25.0% 648 20s 7 6 3.00000 1 164 4.00000 3.00000 25.0% 370 25s 10 8 3.00000 1 287 4.00000 3.00000 25.0% 259 37s 13 10 infeasible 13 4.00000 3.00000 25.0% 5348 40s Cutting planes: Gomory: 8 Zero half: 23 Explored 15 nodes (149473 simplex iterations) in 41.05 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%