Gurobi 5.0.1 (linux64) logging started Fri Nov 16 11:22:25 2012 Optimize a model with 17570 rows, 4970 columns and 57400 nonzeros Presolve time: 0.13s Presolved: 17570 rows, 4970 columns, 57518 nonzeros Variable types: 0 continuous, 4970 integer (4970 binary) Found heuristic solution: objective 40.0000000 Root relaxation: objective 2.000000e+00, 9897 iterations, 2.45 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 140 40.00000 2.00000 95.0% - 2s H 0 0 16.0000000 2.00000 87.5% - 3s H 0 0 5.0000000 2.00000 60.0% - 3s 0 0 2.00000 0 140 5.00000 2.00000 60.0% - 3s 0 0 2.00000 0 140 5.00000 2.00000 60.0% - 3s 0 0 2.00000 0 140 5.00000 2.00000 60.0% - 4s 0 0 2.00000 0 140 5.00000 2.00000 60.0% - 5s 0 0 2.00000 0 140 5.00000 2.00000 60.0% - 7s 0 0 2.00000 0 140 5.00000 2.00000 60.0% - 7s 0 2 2.00000 0 140 5.00000 2.00000 60.0% - 17s 1 3 3.00000 1 784 5.00000 2.00000 60.0% 35286 29s 2 4 3.00000 1 686 5.00000 3.00000 40.0% 31520 40s 27 23 4.00000 20 114 5.00000 3.00000 40.0% 3255 46s * 36 6 28 4.0000000 3.00000 25.0% 2457 47s 44 2 cutoff 4 4.00000 3.00000 25.0% 2275 51s Cutting planes: Clique: 17 Explored 47 nodes (134575 simplex iterations) in 54.86 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%