Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:58:40 2012 Optimize a model with 11844 rows, 4032 columns and 39312 nonzeros Presolve removed 1 rows and 63 columns Presolve time: 0.10s Presolved: 11843 rows, 3969 columns, 39510 nonzeros Variable types: 0 continuous, 3969 integer (3969 binary) Found heuristic solution: objective 42.0000000 Root relaxation: objective 2.000000e+00, 4534 iterations, 0.26 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 124 42.00000 2.00000 95.2% - 1s H 0 0 9.0000000 2.00000 77.8% - 1s H 0 0 5.0000000 2.00000 60.0% - 2s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 3s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 8s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 14s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 20s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 27s 0 0 2.00000 0 124 5.00000 2.00000 60.0% - 31s H 0 0 4.0000000 2.00000 50.0% - 35s 0 2 2.00000 0 124 4.00000 2.00000 50.0% - 44s 1 3 2.50000 1 155 4.00000 2.00000 50.0% 19099 48s 2 4 2.50000 1 728 4.00000 2.50000 37.5% 15531 53s 6 8 2.66667 4 229 4.00000 2.50000 37.5% 5995 55s 27 8 2.60000 3 297 4.00000 2.50000 37.5% 1940 60s 53 12 3.00000 2 180 4.00000 2.50000 37.5% 1337 65s 104 15 2.60000 5 276 4.00000 2.50004 37.5% 888 70s Cutting planes: Clique: 136 Explored 174 nodes (182043 simplex iterations) in 72.76 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%