Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:38:51 2012 Optimize a model with 13082 rows, 3906 columns and 42904 nonzeros Presolve time: 0.10s Presolved: 13082 rows, 3906 columns, 43198 nonzeros Variable types: 0 continuous, 3906 integer (3906 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 2.000000e+00, 3450 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 0 124 43.00000 2.00000 95.3% - 0s H 0 0 15.0000000 2.00000 86.7% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 1s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 5s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 13s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 18s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 25s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 29s H 0 0 4.0000000 2.00000 50.0% - 32s 0 2 2.00000 0 124 4.00000 2.00000 50.0% - 42s 1 3 3.00000 1 397 4.00000 2.00000 50.0% 39396 52s 2 4 3.00000 1 669 4.00000 3.00000 25.0% 28632 60s 19 7 3.00000 5 112 4.00000 3.00000 25.0% 3975 65s 35 5 3.00000 3 423 4.00000 3.00000 25.0% 2764 70s Cutting planes: Clique: 161 Explored 45 nodes (189528 simplex iterations) in 74.31 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%