Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:26:22 2012 Optimize a model with 541 rows, 499 columns and 1849 nonzeros Presolve removed 0 rows and 17 columns Presolve time: 0.00s Presolved: 541 rows, 482 columns, 1832 nonzeros Variable types: 0 continuous, 482 integer (481 binary) Found heuristic solution: objective 111.0000000 Root relaxation: objective 0.000000e+00, 279 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 0 205 111.00000 0.00000 100% - 0s H 0 0 85.0000000 0.00000 100% - 0s H 0 0 72.0000000 0.00000 100% - 0s H 0 0 67.0000000 0.00000 100% - 0s 0 0 0.43192 0 206 67.00000 0.43192 99.4% - 0s H 0 0 62.0000000 0.43192 99.3% - 0s 0 0 0.75419 0 207 62.00000 0.75419 98.8% - 0s H 0 0 60.0000000 0.75419 98.7% - 0s 0 0 1.00000 0 207 60.00000 1.00000 98.3% - 0s H 0 0 58.0000000 1.00000 98.3% - 0s 0 0 1.00000 0 208 58.00000 1.00000 98.3% - 0s 0 0 1.00000 0 205 58.00000 1.00000 98.3% - 0s H 0 0 57.0000000 1.00000 98.2% - 0s H 0 0 55.0000000 1.00000 98.2% - 0s H 0 0 53.0000000 1.00000 98.1% - 0s 0 2 1.00000 0 205 53.00000 1.00000 98.1% - 0s H 27 27 44.0000000 2.14273 95.1% 57.1 0s H 54 52 22.0000000 2.14273 90.3% 39.7 0s * 58 45 31 21.0000000 2.14273 89.8% 38.3 0s H 549 189 20.0000000 9.82606 50.9% 31.0 1s 3195 739 17.99200 25 156 20.00000 13.72043 31.4% 23.7 5s * 4276 753 31 19.0000000 14.61017 23.1% 22.4 6s Explored 6925 nodes (146388 simplex iterations) in 9.68 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%