Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:43:13 2012 Optimize a model with 13695 rows, 4160 columns and 44926 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.39s Presolved: 13757 rows, 4158 columns, 48594 nonzeros Variable types: 0 continuous, 4158 integer (4158 binary) Found heuristic solution: objective 64.0000000 Root relaxation: objective 2.000000e+00, 2995 iterations, 0.11 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 126 64.00000 2.00000 96.9% - 0s H 0 0 63.0000000 2.00000 96.8% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 176 5.00000 2.66667 46.7% - 2s 0 0 2.67027 0 3661 5.00000 2.67027 46.6% - 2s 0 0 2.67027 0 3655 5.00000 2.67027 46.6% - 4s 0 0 2.67027 0 3655 5.00000 2.67027 46.6% - 5s 0 0 2.67027 0 3447 5.00000 2.67027 46.6% - 7s 0 0 2.67027 0 3441 5.00000 2.67027 46.6% - 9s 0 0 2.67027 0 3403 5.00000 2.67027 46.6% - 10s 0 0 2.67027 0 3266 5.00000 2.67027 46.6% - 12s 0 0 2.67027 0 3361 5.00000 2.67027 46.6% - 14s 0 0 2.67027 0 3293 5.00000 2.67027 46.6% - 16s 0 0 2.67027 0 3281 5.00000 2.67027 46.6% - 18s 0 0 2.67027 0 3269 5.00000 2.67027 46.6% - 19s 0 0 2.67027 0 3252 5.00000 2.67027 46.6% - 21s 0 0 2.67027 0 3285 5.00000 2.67027 46.6% - 22s 0 0 2.67027 0 3310 5.00000 2.67027 46.6% - 24s 0 0 2.67027 0 3300 5.00000 2.67027 46.6% - 26s 0 0 2.67027 0 3300 5.00000 2.67027 46.6% - 28s 0 0 2.67027 0 3300 5.00000 2.67027 46.6% - 29s 0 2 2.80000 0 3300 5.00000 2.80000 44.0% - 34s 5 3 infeasible 4 5.00000 3.00000 40.0% 755 35s * 34 3 27 4.0000000 3.00000 25.0% 430 38s 37 0 cutoff 1 4.00000 4.00000 0.0% 562 40s Cutting planes: Clique: 84 Zero half: 8 Explored 38 nodes (83394 simplex iterations) in 40.67 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%