current bounds on the number of colors: 0 -- 48 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:10:08 2012 Optimize a model with 13632 rows, 1718 columns and 41904 nonzeros Presolve time: 0.05s Presolved: 13632 rows, 1718 columns, 41904 nonzeros Variable types: 0 continuous, 1718 integer (1718 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 (335 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 -- 24 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:10:09 2012 Optimize a model with 6840 rows, 1142 columns and 20952 nonzeros Presolve time: 0.02s Presolved: 6840 rows, 1142 columns, 20952 nonzeros Variable types: 0 continuous, 1142 integer (1142 binary) Root relaxation: objective 0.000000e+00, 107 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 (599 simplex iterations) in 0.05 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 18:10:09 2012 Optimize a model with 3444 rows, 854 columns and 10476 nonzeros Presolve time: 0.01s Presolved: 3444 rows, 854 columns, 10476 nonzeros Variable types: 0 continuous, 854 integer (854 binary) Root relaxation: objective 0.000000e+00, 96 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 62 - 0.00000 - - 0s 0 0 0.00000 0 54 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2672 simplex iterations) in 0.28 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 18:10:09 2012 Optimize a model with 5142 rows, 998 columns and 15714 nonzeros Presolve time: 0.01s Presolved: 5142 rows, 998 columns, 15714 nonzeros Variable types: 0 continuous, 998 integer (998 binary) Root relaxation: objective 0.000000e+00, 109 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 * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 1 Clique: 40 MIR: 9 Zero half: 43 Explored 0 nodes (1341 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: 6 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:10:09 2012 Optimize a model with 4010 rows, 902 columns and 12222 nonzeros Presolve time: 0.01s Presolved: 4010 rows, 902 columns, 12222 nonzeros Variable types: 0 continuous, 902 integer (902 binary) Root relaxation: objective 0.000000e+00, 96 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 54 - 0.00000 - - 0s 0 0 0.00000 0 38 - 0.00000 - - 0s 0 0 0.00000 0 243 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 262 - 0.00000 - - 1s 0 0 0.00000 0 265 - 0.00000 - - 2s 0 0 0.00000 0 257 - 0.00000 - - 3s 0 0 0.00000 0 248 - 0.00000 - - 3s 0 0 0.00000 0 262 - 0.00000 - - 4s 0 0 0.00000 0 251 - 0.00000 - - 5s 0 0 0.00000 0 269 - 0.00000 - - 6s 0 0 0.00000 0 263 - 0.00000 - - 6s 0 2 0.00000 0 262 - 0.00000 - - 6s Cutting planes: Clique: 109 Zero half: 8 Explored 5 nodes (36626 simplex iterations) in 7.05 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: 7 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:10:16 2012 Optimize a model with 4576 rows, 950 columns and 13968 nonzeros Presolve time: 0.01s Presolved: 4576 rows, 950 columns, 13968 nonzeros Variable types: 0 continuous, 950 integer (950 binary) Root relaxation: objective 0.000000e+00, 96 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 48 - 0.00000 - - 0s 0 0 0.00000 0 49 - 0.00000 - - 0s 0 0 0.00000 0 164 - 0.00000 - - 0s 0 0 0.00000 0 208 - 0.00000 - - 0s 0 0 0.00000 0 126 - 0.00000 - - 1s 0 0 0.00000 0 176 - 0.00000 - - 1s 0 0 0.00000 0 141 - 0.00000 - - 2s 0 0 0.00000 0 136 - 0.00000 - - 2s 0 0 0.00000 0 126 - 0.00000 - - 3s 0 0 0.00000 0 110 - 0.00000 - - 3s 0 0 0.00000 0 126 - 0.00000 - - 4s 0 0 0.00000 0 139 - 0.00000 - - 4s 0 0 0.00000 0 138 - 0.00000 - - 5s 0 2 0.00000 0 84 - 0.00000 - - 5s Cutting planes: Clique: 85 Zero half: 2 Explored 81 nodes (49817 simplex iterations) in 6.79 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 9