Gurobi 5.0.1 (linux64) logging started Fri Nov 16 11:11:42 2012 Optimize a model with 18130 rows, 4970 columns and 59080 nonzeros Presolve time: 0.14s Presolved: 18130 rows, 4970 columns, 59208 nonzeros Variable types: 0 continuous, 4970 integer (4970 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 2.000000e+00, 7013 iterations, 1.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 140 41.00000 2.00000 95.1% - 4s H 0 0 18.0000000 2.00000 88.9% - 4s H 0 0 5.0000000 2.00000 60.0% - 4s 0 0 2.00000 0 140 5.00000 2.00000 60.0% - 6s 0 0 2.00000 0 140 5.00000 2.00000 60.0% - 15s 0 0 2.00000 0 140 5.00000 2.00000 60.0% - 23s 0 0 2.00000 0 140 5.00000 2.00000 60.0% - 36s 0 0 2.00000 0 140 5.00000 2.00000 60.0% - 46s 0 0 2.00000 0 140 5.00000 2.00000 60.0% - 54s 0 2 2.00000 0 140 5.00000 2.00000 60.0% - 75s 1 3 3.00000 1 728 5.00000 2.00000 60.0% 50261 88s 2 4 3.00000 1 771 5.00000 3.00000 40.0% 40396 101s 8 6 4.00000 4 260 5.00000 3.00000 40.0% 11985 106s 30 18 3.00000 2 136 5.00000 3.00000 40.0% 3797 110s 31 19 3.14286 3 488 5.00000 3.00000 40.0% 4404 117s 32 20 3.25000 3 411 5.00000 3.00000 40.0% 4775 123s 39 19 4.00000 5 135 5.00000 3.00000 40.0% 4040 125s 87 33 4.00000 16 86 5.00000 4.00000 20.0% 1887 131s * 93 4 21 4.0000000 4.00000 0.0% 1766 131s Cutting planes: Clique: 151 Zero half: 1 Explored 94 nodes (285523 simplex iterations) in 131.13 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%