current bounds on the number of colors: 0 -- 50 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:14:30 2012 Optimize a model with 15900 rows, 1884 columns and 48800 nonzeros Presolve time: 0.06s Presolved: 15900 rows, 1884 columns, 48800 nonzeros Variable types: 0 continuous, 1884 integer (1884 binary) Root relaxation: objective 0.000000e+00, 101 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (318 simplex iterations) in 0.10 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 25 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:14:30 2012 Optimize a model with 7658 rows, 1234 columns and 23424 nonzeros Presolve time: 0.02s Presolved: 7658 rows, 1234 columns, 23424 nonzeros Variable types: 0 continuous, 1234 integer (1234 binary) Root relaxation: objective 0.000000e+00, 108 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1064 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:14:30 2012 Optimize a model with 3854 rows, 934 columns and 11712 nonzeros Presolve time: 0.01s Presolved: 3854 rows, 934 columns, 11712 nonzeros Variable types: 0 continuous, 934 integer (934 binary) Root relaxation: objective 0.000000e+00, 100 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 64 - 0.00000 - - 0s 0 0 0.00000 0 58 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2018 simplex iterations) in 0.24 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 6 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:14:30 2012 Optimize a model with 5756 rows, 1084 columns and 17568 nonzeros Presolve time: 0.02s Presolved: 5756 rows, 1084 columns, 17568 nonzeros Variable types: 0 continuous, 1084 integer (1084 binary) Root relaxation: objective 0.000000e+00, 114 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 68 - 0.00000 - - 0s 0 0 0.00000 0 34 - 0.00000 - - 0s 0 0 0.00000 0 180 - 0.00000 - - 0s 0 0 0.00000 0 209 - 0.00000 - - 0s 0 0 0.00000 0 206 - 0.00000 - - 1s 0 0 0.00000 0 169 - 0.00000 - - 1s 0 0 0.00000 0 215 - 0.00000 - - 2s 0 0 0.00000 0 200 - 0.00000 - - 2s 0 0 0.00000 0 237 - 0.00000 - - 3s 0 0 0.00000 0 237 - 0.00000 - - 3s 0 2 0.00000 0 237 - 0.00000 - - 4s 49 13 infeasible 15 - 0.00000 - 173 5s Cutting planes: Gomory: 1 Clique: 113 Zero half: 4 Explored 540 nodes (85944 simplex iterations) in 8.95 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 9 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:14:39 2012 Optimize a model with 6390 rows, 1134 columns and 19520 nonzeros Presolve time: 0.02s Presolved: 6390 rows, 1134 columns, 19520 nonzeros Variable types: 0 continuous, 1134 integer (1134 binary) Root relaxation: objective 0.000000e+00, 116 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 42 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1227 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% optimal solution found: number of colors: 10