Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:15:29 2012 Optimize a model with 557 rows, 505 columns and 1895 nonzeros Presolve removed 0 rows and 19 columns Presolve time: 0.00s Presolved: 557 rows, 486 columns, 1876 nonzeros Variable types: 0 continuous, 486 integer (485 binary) Found heuristic solution: objective 110.0000000 Root relaxation: objective 0.000000e+00, 315 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 0 207 110.00000 0.00000 100% - 0s H 0 0 62.0000000 0.00000 100% - 0s 0 0 0.46639 0 210 62.00000 0.46639 99.2% - 0s H 0 0 59.0000000 0.46639 99.2% - 0s 0 0 0.93589 0 212 59.00000 0.93589 98.4% - 0s H 0 0 53.0000000 0.93589 98.2% - 0s 0 0 0.93600 0 213 53.00000 0.93600 98.2% - 0s 0 0 0.93600 0 213 53.00000 0.93600 98.2% - 0s 0 2 0.94008 0 213 53.00000 0.94008 98.2% - 0s H 27 27 43.0000000 2.43192 94.3% 46.1 0s * 54 47 32 23.0000000 2.43192 89.4% 32.5 0s * 1370 494 43 22.0000000 8.84713 59.8% 30.3 2s 3602 1486 17.46452 29 186 22.00000 11.90286 45.9% 23.4 5s H 5557 2013 21.0000000 12.86111 38.8% 21.6 7s 7932 2491 cutoff 31 21.00000 13.70482 34.7% 21.0 10s 12432 2985 cutoff 32 21.00000 14.87952 29.1% 20.8 15s 16895 3100 16.16561 26 186 21.00000 15.79310 24.8% 21.3 20s 21261 3073 17.74850 24 191 21.00000 16.44828 21.7% 21.4 25s 26209 2774 18.76074 24 189 21.00000 17.12258 18.5% 21.4 30s 31740 1923 20.00000 29 186 21.00000 18.00000 14.3% 20.7 35s Explored 36388 nodes (745126 simplex iterations) in 39.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.100000000000e+01, best bound 2.100000000000e+01, gap 0.0%