Gurobi 5.0.1 (linux64) logging started Tue Nov 20 14:27:06 2012 Optimize a model with 905 rows, 189 columns and 1810 nonzeros Presolve removed 191 rows and 0 columns Presolve time: 0.01s Presolved: 714 rows, 189 columns, 1557 nonzeros Variable types: 0 continuous, 189 integer (189 binary) Found heuristic solution: objective 56.0000000 Root relaxation: objective 7.624052e+01, 450 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 76.24052 0 185 56.00000 76.24052 36.1% - 0s 0 0 75.66124 0 185 56.00000 75.66124 35.1% - 0s H 0 0 59.0000000 75.66124 28.2% - 0s 0 0 74.81818 0 180 59.00000 74.81818 26.8% - 0s 0 0 74.21450 0 184 59.00000 74.21450 25.8% - 0s 0 0 73.75230 0 185 59.00000 73.75230 25.0% - 0s 0 0 73.44052 0 185 59.00000 73.44052 24.5% - 0s 0 0 73.30837 0 185 59.00000 73.30837 24.3% - 0s 0 0 73.02218 0 186 59.00000 73.02218 23.8% - 0s 0 0 72.91519 0 186 59.00000 72.91519 23.6% - 0s 0 0 72.64222 0 185 59.00000 72.64222 23.1% - 0s 0 0 72.32057 0 185 59.00000 72.32057 22.6% - 0s 0 0 71.92621 0 186 59.00000 71.92621 21.9% - 0s 0 0 71.81704 0 186 59.00000 71.81704 21.7% - 0s 0 0 71.77852 0 187 59.00000 71.77852 21.7% - 0s 0 0 71.77852 0 185 59.00000 71.77852 21.7% - 0s H 0 0 60.0000000 71.77852 19.6% - 0s 0 2 71.77498 0 184 60.00000 71.77498 19.6% - 0s H 15 15 61.0000000 71.77498 17.7% 79.9 0s H 76 39 64.0000000 71.37212 11.5% 67.4 0s 607 188 67.64122 9 184 64.00000 69.05370 7.90% 60.0 5s 1469 348 66.50000 20 139 64.00000 68.48684 7.01% 54.2 10s Cutting planes: Gomory: 1 Clique: 1 Zero half: 78 Mod-K: 1 Explored 3656 nodes (148828 simplex iterations) in 13.96 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.400000000000e+01, best bound 6.400000000000e+01, gap 0.0%