current bounds on the number of colors: 0 -- 154 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:53:25 2012 Optimize a model with 45661 rows, 12449 columns and 148379 nonzeros Presolve time: 0.16s Presolved: 45661 rows, 12449 columns, 148379 nonzeros Variable types: 0 continuous, 12449 integer (12449 binary) Root relaxation: objective 0.000000e+00, 498 iterations, 0.03 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 (823 simplex iterations) in 0.26 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 -- 77 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:53:26 2012 Optimize a model with 22612 rows, 6443 columns and 73226 nonzeros Presolve time: 0.12s Presolved: 22612 rows, 6443 columns, 73226 nonzeros Variable types: 0 continuous, 6443 integer (6443 binary) Root relaxation: objective 0.000000e+00, 395 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 (699 simplex iterations) in 0.16 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 -- 38 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:53:26 2012 Optimize a model with 11383 rows, 3517 columns and 36613 nonzeros Presolve time: 0.04s Presolved: 11383 rows, 3517 columns, 36613 nonzeros Variable types: 0 continuous, 3517 integer (3517 binary) Root relaxation: objective 0.000000e+00, 326 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 (609 simplex iterations) in 0.07 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:53:26 2012 Optimize a model with 5473 rows, 1977 columns and 17343 nonzeros Presolve time: 0.02s Presolved: 5473 rows, 1977 columns, 17343 nonzeros Variable types: 0 continuous, 1977 integer (1977 binary) Root relaxation: objective 0.000000e+00, 323 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 (596 simplex iterations) in 0.03 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:53:26 2012 Optimize a model with 2518 rows, 1207 columns and 7708 nonzeros Presolve time: 0.01s Presolved: 2518 rows, 1207 columns, 7708 nonzeros Variable types: 0 continuous, 1207 integer (1207 binary) Root relaxation: objective 0.000000e+00, 364 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 0 282 - 0.00000 - - 0s 0 0 0.00000 0 240 - 0.00000 - - 0s 0 0 0.00000 0 274 - 0.00000 - - 0s 0 0 0.00000 0 266 - 0.00000 - - 0s 0 0 0.00000 0 336 - 0.00000 - - 0s 0 0 0.00000 0 321 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Zero half: 1 Explored 0 nodes (10054 simplex iterations) in 0.82 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:53:27 2012 Optimize a model with 1336 rows, 899 columns and 3854 nonzeros Presolve removed 154 rows and 154 columns Presolve time: 0.00s Presolved: 1182 rows, 745 columns, 3546 nonzeros Variable types: 0 continuous, 745 integer (745 binary) Root relaxation: objective 0.000000e+00, 158 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 0 154 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (651 simplex iterations) in 0.01 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: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:53:27 2012 Optimize a model with 1927 rows, 1053 columns and 5781 nonzeros Presolve time: 0.00s Presolved: 1927 rows, 1053 columns, 5781 nonzeros Variable types: 0 continuous, 1053 integer (1053 binary) Root relaxation: objective 0.000000e+00, 372 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 0 297 - 0.00000 - - 0s 0 0 0.00000 0 300 - 0.00000 - - 0s 0 0 0.00000 0 365 - 0.00000 - - 0s 0 0 0.00000 0 421 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 2 Zero half: 389 Explored 0 nodes (6164 simplex iterations) in 0.61 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 4