Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:25:40 2012 Optimize a model with 535 rows, 496 columns and 1831 nonzeros Presolve removed 0 rows and 23 columns Presolve time: 0.00s Presolved: 535 rows, 473 columns, 1808 nonzeros Variable types: 0 continuous, 473 integer (472 binary) Found heuristic solution: objective 104.0000000 Root relaxation: objective 0.000000e+00, 262 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 0 199 104.00000 0.00000 100% - 0s H 0 0 81.0000000 0.00000 100% - 0s 0 0 0.43755 0 200 81.00000 0.43755 99.5% - 0s H 0 0 63.0000000 0.43755 99.3% - 0s 0 0 1.00000 0 203 63.00000 1.00000 98.4% - 0s H 0 0 41.0000000 1.00000 97.6% - 0s 0 0 1.00000 0 204 41.00000 1.00000 97.6% - 0s 0 0 1.00000 0 201 41.00000 1.00000 97.6% - 0s 0 2 1.00000 0 201 41.00000 1.00000 97.6% - 0s H 45 45 26.0000000 1.00000 96.2% 38.8 0s H 54 54 25.0000000 1.00000 96.0% 34.7 0s * 75 56 42 23.0000000 1.00000 95.7% 28.1 0s * 241 162 24 22.0000000 2.87358 86.9% 32.3 0s * 891 403 48 21.0000000 7.33083 65.1% 30.4 1s * 1562 483 45 20.0000000 8.83607 55.8% 27.0 2s 3100 905 cutoff 29 20.00000 12.00000 40.0% 25.1 5s 6644 1134 cutoff 27 20.00000 14.54545 27.3% 23.8 10s 10613 762 cutoff 26 20.00000 16.74419 16.3% 22.6 15s H11155 382 19.0000000 17.08491 10.1% 22.6 15s Explored 11591 nodes (259020 simplex iterations) in 16.00 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%