Gurobi 5.0.1 (linux64) logging started Fri Nov 16 09:43:26 2012 Optimize a model with 15879 rows, 4556 columns and 51925 nonzeros Presolve time: 0.12s Presolved: 15879 rows, 4556 columns, 52106 nonzeros Variable types: 0 continuous, 4556 integer (4556 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 2.000000e+00, 7411 iterations, 1.19 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 134 43.00000 2.00000 95.3% - 1s H 0 0 14.0000000 2.00000 85.7% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.00000 0 134 5.00000 2.00000 60.0% - 2s 0 0 2.00000 0 134 5.00000 2.00000 60.0% - 7s 0 0 2.00000 0 134 5.00000 2.00000 60.0% - 10s 0 0 2.00000 0 134 5.00000 2.00000 60.0% - 13s 0 0 2.00000 0 134 5.00000 2.00000 60.0% - 15s 0 0 2.00000 0 134 5.00000 2.00000 60.0% - 17s 0 2 2.00000 0 134 5.00000 2.00000 60.0% - 23s 1 3 3.00000 1 507 5.00000 2.00658 59.9% 20677 29s 2 4 3.00000 1 599 5.00000 3.00000 40.0% 16864 34s 3 5 3.00000 2 473 5.00000 3.00000 40.0% 12190 35s 9 7 3.07692 5 196 5.00000 3.00000 40.0% 6869 41s * 24 6 17 4.0000000 3.00000 25.0% 2746 41s 30 4 cutoff 4 4.00000 3.00000 25.0% 3485 54s 31 3 cutoff 3 4.00000 3.00000 25.0% 4263 63s 32 2 cutoff 4 4.00000 3.00000 25.0% 5130 73s 34 4 3.00000 3 128 4.00000 3.00000 25.0% 5032 75s Cutting planes: Clique: 28 Explored 41 nodes (215823 simplex iterations) in 78.81 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%