Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:07:12 2012 Optimize a model with 768 rows, 172 columns and 1536 nonzeros Presolve removed 177 rows and 2 columns Presolve time: 0.00s Presolved: 591 rows, 170 columns, 1295 nonzeros Variable types: 0 continuous, 170 integer (170 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 6.918182e+01, 344 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 69.18182 0 161 51.00000 69.18182 35.7% - 0s 0 0 68.09897 0 169 51.00000 68.09897 33.5% - 0s H 0 0 53.0000000 68.09897 28.5% - 0s 0 0 67.27248 0 168 53.00000 67.27248 26.9% - 0s 0 0 66.78981 0 170 53.00000 66.78981 26.0% - 0s 0 0 66.36531 0 167 53.00000 66.36531 25.2% - 0s 0 0 65.94311 0 166 53.00000 65.94311 24.4% - 0s 0 0 65.79681 0 168 53.00000 65.79681 24.1% - 0s 0 0 65.60140 0 168 53.00000 65.60140 23.8% - 0s 0 0 65.49933 0 170 53.00000 65.49933 23.6% - 0s 0 0 65.46778 0 169 53.00000 65.46778 23.5% - 0s 0 0 65.38172 0 169 53.00000 65.38172 23.4% - 0s 0 0 65.31826 0 168 53.00000 65.31826 23.2% - 0s 0 0 65.27497 0 169 53.00000 65.27497 23.2% - 0s 0 0 65.23808 0 168 53.00000 65.23808 23.1% - 0s 0 0 65.22011 0 168 53.00000 65.22011 23.1% - 0s 0 0 65.22011 0 167 53.00000 65.22011 23.1% - 0s 0 2 65.21722 0 167 53.00000 65.21722 23.1% - 0s H 7 7 55.0000000 65.03507 18.2% 79.9 0s * 16 14 12 56.0000000 65.03507 16.1% 56.8 0s 611 274 59.43333 13 163 56.00000 62.32990 11.3% 44.5 5s H 1770 559 57.0000000 61.76027 8.35% 41.5 8s 2457 709 cutoff 27 57.00000 61.00000 7.02% 38.4 10s Cutting planes: Gomory: 2 Clique: 1 Zero half: 75 Explored 6649 nodes (196637 simplex iterations) in 14.48 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.700000000000e+01, best bound 5.700000000000e+01, gap 0.0%