current bounds on the number of colors: 0 -- 106 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:57:55 2012 Optimize a model with 29945 rows, 6181 columns and 95135 nonzeros Presolve time: 0.14s Presolved: 29945 rows, 6181 columns, 95135 nonzeros Variable types: 0 continuous, 6181 integer (6181 binary) Root relaxation: objective 0.000000e+00, 367 iterations, 0.02 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 (605 simplex iterations) in 0.21 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 -- 53 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:57:56 2012 Optimize a model with 14744 rows, 3319 columns and 46670 nonzeros Presolve time: 0.06s Presolved: 14744 rows, 3319 columns, 46670 nonzeros Variable types: 0 continuous, 3319 integer (3319 binary) Root relaxation: objective 0.000000e+00, 252 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 (457 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 -- 26 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:57:56 2012 Optimize a model with 7425 rows, 1941 columns and 23335 nonzeros Presolve time: 0.02s Presolved: 7425 rows, 1941 columns, 23335 nonzeros Variable types: 0 continuous, 1941 integer (1941 binary) Root relaxation: objective 0.000000e+00, 217 iterations, 0.00 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 (406 simplex iterations) in 0.04 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:57:56 2012 Optimize a model with 3484 rows, 1199 columns and 10770 nonzeros Presolve time: 0.01s Presolved: 3484 rows, 1199 columns, 10770 nonzeros Variable types: 0 continuous, 1199 integer (1199 binary) Root relaxation: objective 0.000000e+00, 236 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 52 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1982 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 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:57:56 2012 Optimize a model with 1795 rows, 881 columns and 5385 nonzeros Presolve time: 0.00s Presolved: 1795 rows, 881 columns, 5385 nonzeros Variable types: 0 continuous, 881 integer (881 binary) Root relaxation: objective 0.000000e+00, 233 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 0 164 - 0.00000 - - 0s 0 0 0.00000 0 210 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2612 simplex iterations) in 0.23 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: 3 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:57:56 2012 Optimize a model with 2358 rows, 987 columns and 7180 nonzeros Presolve time: 0.01s Presolved: 2358 rows, 987 columns, 7180 nonzeros Variable types: 0 continuous, 987 integer (987 binary) Root relaxation: objective 0.000000e+00, 229 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 0 204 - 0.00000 - - 0s 0 0 0.00000 0 196 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 0s 0 0 0.00000 0 287 - 0.00000 - - 0s 0 0 0.00000 0 274 - 0.00000 - - 0s 0 0 0.00000 0 281 - 0.00000 - - 0s 0 0 0.00000 0 255 - 0.00000 - - 1s 0 0 0.00000 0 258 - 0.00000 - - 1s 0 0 0.00000 0 274 - 0.00000 - - 1s 0 0 0.00000 0 269 - 0.00000 - - 2s 0 0 0.00000 0 279 - 0.00000 - - 2s 0 0 0.00000 0 279 - 0.00000 - - 2s 0 2 0.00000 0 279 - 0.00000 - - 2s Cutting planes: Clique: 13 Zero half: 36 Explored 185 nodes (43307 simplex iterations) in 4.58 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: 4 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:58:01 2012 Optimize a model with 2921 rows, 1093 columns and 8975 nonzeros Presolve time: 0.01s Presolved: 2921 rows, 1093 columns, 8975 nonzeros Variable types: 0 continuous, 1093 integer (1093 binary) Root relaxation: objective 0.000000e+00, 240 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 0 204 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1256 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% optimal solution found: number of colors: 5