Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:35:48 2012 Optimize a model with 601 rows, 150 columns and 1202 nonzeros Presolve removed 123 rows and 0 columns Presolve time: 0.00s Presolved: 478 rows, 150 columns, 1040 nonzeros Variable types: 0 continuous, 150 integer (150 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 6.114286e+01, 311 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 61.14286 0 146 45.00000 61.14286 35.9% - 0s H 0 0 47.0000000 61.14286 30.1% - 0s 0 0 59.75000 0 117 47.00000 59.75000 27.1% - 0s 0 0 59.50526 0 147 47.00000 59.50526 26.6% - 0s 0 0 58.98534 0 149 47.00000 58.98534 25.5% - 0s 0 0 58.48161 0 148 47.00000 58.48161 24.4% - 0s 0 0 57.94613 0 146 47.00000 57.94613 23.3% - 0s 0 0 57.64460 0 145 47.00000 57.64460 22.6% - 0s 0 0 57.43114 0 149 47.00000 57.43114 22.2% - 0s 0 0 57.35193 0 149 47.00000 57.35193 22.0% - 0s 0 0 57.34105 0 149 47.00000 57.34105 22.0% - 0s 0 0 57.34105 0 148 47.00000 57.34105 22.0% - 0s H 0 0 48.0000000 57.34105 19.5% - 0s 0 2 57.33508 0 148 48.00000 57.33508 19.4% - 0s * 43 31 18 50.0000000 57.26577 14.5% 42.3 0s * 388 118 9 51.0000000 55.20000 8.24% 30.8 0s 614 170 53.25000 11 145 51.00000 54.78947 7.43% 30.4 5s 627 178 53.14286 8 149 51.00000 54.78947 7.43% 29.7 10s 642 188 52.80392 13 149 51.00000 54.78947 7.43% 29.0 15s Cutting planes: Gomory: 1 Clique: 2 Zero half: 164 Explored 1609 nodes (56997 simplex iterations) in 17.86 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.100000000000e+01, best bound 5.100000000000e+01, gap 0.0%