Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:57:55 2012 Optimize a model with 581 rows, 523 columns and 1973 nonzeros Presolve removed 0 rows and 16 columns Presolve time: 0.00s Presolved: 581 rows, 507 columns, 1957 nonzeros Variable types: 0 continuous, 507 integer (506 binary) Found heuristic solution: objective 111.0000000 Root relaxation: objective 0.000000e+00, 292 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 0 216 111.00000 0.00000 100% - 0s H 0 0 86.0000000 0.00000 100% - 0s H 0 0 82.0000000 0.00000 100% - 0s 0 0 0.38441 0 218 82.00000 0.38441 100% - 0s H 0 0 78.0000000 0.38441 100% - 0s H 0 0 72.0000000 0.38441 99.5% - 0s 0 0 0.82451 0 222 72.00000 0.82451 98.9% - 0s H 0 0 56.0000000 0.82451 98.5% - 0s 0 0 0.82466 0 223 56.00000 0.82466 98.5% - 0s 0 0 0.82466 0 223 56.00000 0.82466 98.5% - 0s H 0 0 51.0000000 0.82466 98.4% - 0s 0 2 0.82511 0 223 51.00000 0.82511 98.4% - 0s H 27 27 41.0000000 1.00000 97.6% 38.1 0s * 54 45 35 23.0000000 1.00000 95.7% 32.5 0s H 221 149 21.0000000 1.00000 95.2% 42.7 0s H 567 239 19.0000000 2.96078 84.4% 40.4 1s 3063 368 15.46243 25 195 19.00000 13.17647 30.7% 28.9 5s Explored 5667 nodes (149897 simplex iterations) in 8.34 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%