Gurobi 5.0.1 (linux64) logging started Fri Nov 16 06:31:53 2012 Optimize a model with 11033 rows, 3540 columns and 36403 nonzeros Presolve time: 0.09s Presolved: 11033 rows, 3540 columns, 36714 nonzeros Variable types: 0 continuous, 3540 integer (3540 binary) Found heuristic solution: objective 38.0000000 Root relaxation: objective 2.000000e+00, 3921 iterations, 0.21 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 118 38.00000 2.00000 94.7% - 1s H 0 0 13.0000000 2.00000 84.6% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.00000 0 118 5.00000 2.00000 60.0% - 2s 0 0 2.00000 0 118 5.00000 2.00000 60.0% - 5s 0 0 2.00000 0 118 5.00000 2.00000 60.0% - 10s H 0 0 4.0000000 2.00000 50.0% - 10s 0 0 2.00000 0 118 4.00000 2.00000 50.0% - 14s 0 0 2.00000 0 118 4.00000 2.00000 50.0% - 18s 0 0 2.00000 0 118 4.00000 2.00000 50.0% - 22s 0 2 2.00000 0 118 4.00000 2.00000 50.0% - 37s 1 3 3.00000 1 632 4.00000 2.00000 50.0% 23011 44s 2 4 3.00000 1 706 4.00000 3.00000 25.0% 29634 57s 19 9 3.00000 3 170 4.00000 3.00000 25.0% 3578 60s 58 8 3.00000 4 116 4.00000 3.00000 25.0% 1593 65s 119 3 3.00000 3 116 4.00000 3.00000 25.0% 1022 70s 129 3 cutoff 8 4.00000 3.00000 25.0% 1103 75s Cutting planes: Clique: 147 Explored 147 nodes (215862 simplex iterations) in 76.83 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%