Gurobi 5.0.1 (linux64) logging started Fri Nov 16 13:28:04 2012 Optimize a model with 18687 rows, 5402 columns and 61099 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.69s Presolved: 18758 rows, 5400 columns, 65916 nonzeros Variable types: 0 continuous, 5400 integer (5400 binary) Found heuristic solution: objective 73.0000000 Root relaxation: objective 2.000000e+00, 3794 iterations, 0.17 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 146 73.00000 2.00000 97.3% - 1s H 0 0 56.0000000 2.00000 96.4% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.66667 0 4294 5.00000 2.66667 46.7% - 12s 0 0 2.66667 0 3088 5.00000 2.66667 46.7% - 13s 0 0 2.66667 0 2744 5.00000 2.66667 46.7% - 14s 0 0 2.66667 0 2746 5.00000 2.66667 46.7% - 14s 0 0 2.66667 0 199 5.00000 2.66667 46.7% - 18s 0 0 2.66981 0 4318 5.00000 2.66981 46.6% - 20s 0 0 2.66981 0 4415 5.00000 2.66981 46.6% - 21s 0 0 2.66981 0 4417 5.00000 2.66981 46.6% - 23s 0 0 2.66981 0 4318 5.00000 2.66981 46.6% - 25s 0 0 2.66981 0 4318 5.00000 2.66981 46.6% - 26s 0 0 2.66981 0 4367 5.00000 2.66981 46.6% - 28s 0 0 2.66981 0 4389 5.00000 2.66981 46.6% - 29s 0 0 2.66981 0 4389 5.00000 2.66981 46.6% - 30s 0 2 2.80000 0 4389 5.00000 2.80000 44.0% - 49s 6 2 infeasible 4 5.00000 3.00000 40.0% 601 50s * 37 5 25 4.0000000 3.00000 25.0% 261 51s Cutting planes: Clique: 106 Zero half: 9 Explored 42 nodes (77085 simplex iterations) in 51.41 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%