Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:40:39 2012 Optimize a model with 171 rows, 126 columns and 551 nonzeros Presolve time: 0.00s Presolved: 171 rows, 126 columns, 551 nonzeros Variable types: 0 continuous, 126 integer (126 binary) Found heuristic solution: objective 36.0000000 Root relaxation: objective 0.000000e+00, 62 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 41 36.00000 0.00000 100% - 0s H 0 0 32.0000000 0.00000 100% - 0s H 0 0 30.0000000 0.00000 100% - 0s H 0 0 26.0000000 0.00000 100% - 0s 0 0 0.51220 0 42 26.00000 0.51220 98.0% - 0s 0 0 1.16374 0 44 26.00000 1.16374 95.5% - 0s H 0 0 25.0000000 1.16374 95.3% - 0s 0 0 1.20889 0 44 25.00000 1.20889 95.2% - 0s 0 0 1.24806 0 45 25.00000 1.24806 95.0% - 0s 0 0 1.24806 0 45 25.00000 1.24806 95.0% - 0s 0 2 1.25608 0 45 25.00000 1.25608 95.0% - 0s * 32 26 21 24.0000000 4.33333 81.9% 18.7 0s * 47 33 13 22.0000000 4.34722 80.2% 18.2 0s * 96 45 16 20.0000000 9.33167 53.3% 19.3 0s * 126 39 9 19.0000000 9.48452 50.1% 18.9 0s H 357 20 18.0000000 15.38710 14.5% 16.2 0s Cutting planes: Gomory: 3 Mod-K: 4 Explored 385 nodes (6252 simplex iterations) in 0.20 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%