Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:44:45 2012 Optimize a model with 529 rows, 485 columns and 1805 nonzeros Presolve removed 0 rows and 14 columns Presolve time: 0.00s Presolved: 529 rows, 471 columns, 1791 nonzeros Variable types: 0 continuous, 471 integer (470 binary) Found heuristic solution: objective 102.0000000 Root relaxation: objective 0.000000e+00, 257 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 0 201 102.00000 0.00000 100% - 0s H 0 0 83.0000000 0.00000 100% - 0s H 0 0 75.0000000 0.00000 100% - 0s 0 0 0.41735 0 203 75.00000 0.41735 99.4% - 0s H 0 0 68.0000000 0.41735 99.4% - 0s 0 0 0.79647 0 206 68.00000 0.79647 98.8% - 0s H 0 0 58.0000000 0.79647 98.6% - 0s 0 2 0.79896 0 206 58.00000 0.79896 98.6% - 0s H 27 27 54.0000000 1.00000 98.1% 35.3 0s H 54 48 23.0000000 1.00000 95.7% 33.9 0s * 58 38 38 22.0000000 1.00000 95.5% 33.9 0s * 105 58 32 21.0000000 1.00000 95.2% 31.4 0s * 179 105 20 20.0000000 1.00000 95.0% 36.6 0s * 898 345 27 19.0000000 6.81818 64.1% 34.3 1s 3329 392 15.88372 20 200 19.00000 13.16216 30.7% 28.9 5s Explored 5253 nodes (150021 simplex iterations) in 7.41 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%