Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:42:08 2012 Optimize a model with 521 rows, 480 columns and 1780 nonzeros Presolve removed 0 rows and 23 columns Presolve time: 0.00s Presolved: 521 rows, 457 columns, 1757 nonzeros Variable types: 0 continuous, 457 integer (456 binary) Found heuristic solution: objective 97.0000000 Root relaxation: objective 0.000000e+00, 249 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 0 194 97.00000 0.00000 100% - 0s H 0 0 87.0000000 0.00000 100% - 0s H 0 0 85.0000000 0.00000 100% - 0s H 0 0 81.0000000 0.00000 100% - 0s 0 0 0.41789 0 196 81.00000 0.41789 99.5% - 0s H 0 0 71.0000000 0.41789 99.4% - 0s 0 0 0.74336 0 199 71.00000 0.74336 99.0% - 0s H 0 0 67.0000000 0.74336 98.9% - 0s H 0 0 65.0000000 0.74336 98.9% - 0s H 0 0 58.0000000 0.74336 98.7% - 0s H 0 0 53.0000000 0.74336 98.6% - 0s 0 2 0.74351 0 199 53.00000 0.74351 98.6% - 0s H 27 27 39.0000000 1.00000 97.4% 50.9 0s * 64 55 40 25.0000000 1.00000 96.0% 38.2 0s * 97 76 16 23.0000000 1.00000 95.7% 37.7 0s * 682 371 28 21.0000000 3.53820 83.2% 41.9 2s * 940 343 21 20.0000000 10.54773 47.3% 40.3 2s Cutting planes: Gomory: 9 Mod-K: 1 Explored 1769 nodes (58235 simplex iterations) in 3.83 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%