Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:19:30 2012 Optimize a model with 521 rows, 473 columns and 1773 nonzeros Presolve removed 0 rows and 17 columns Presolve time: 0.00s Presolved: 521 rows, 456 columns, 1756 nonzeros Variable types: 0 continuous, 456 integer (455 binary) Found heuristic solution: objective 106.0000000 Root relaxation: objective 0.000000e+00, 280 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 0 191 106.00000 0.00000 100% - 0s H 0 0 77.0000000 0.00000 100% - 0s H 0 0 74.0000000 0.00000 100% - 0s H 0 0 72.0000000 0.00000 100% - 0s 0 0 0.35541 0 193 72.00000 0.35541 100% - 0s H 0 0 71.0000000 0.35541 99.5% - 0s 0 0 0.96873 0 196 71.00000 0.96873 98.6% - 0s H 0 0 66.0000000 0.96873 98.5% - 0s H 0 0 62.0000000 0.96873 98.4% - 0s 0 0 0.96874 0 198 62.00000 0.96874 98.4% - 0s 0 0 0.96874 0 197 62.00000 0.96874 98.4% - 0s H 0 0 61.0000000 0.96874 98.4% - 0s 0 2 0.96878 0 197 61.00000 0.96878 98.4% - 0s H 54 52 26.0000000 1.00000 96.2% 34.4 0s * 64 56 38 24.0000000 1.00000 95.8% 33.1 0s * 73 42 44 23.0000000 1.00000 95.7% 30.1 0s * 885 343 33 22.0000000 6.68852 69.6% 36.2 1s * 972 311 29 21.0000000 7.65217 63.6% 35.3 1s 3172 327 cutoff 22 21.00000 15.67961 25.3% 26.2 5s Explored 5017 nodes (122429 simplex iterations) in 7.33 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.100000000000e+01, best bound 2.100000000000e+01, gap 0.0%