current bounds on the number of colors: 0 -- 158 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:06:40 2012 Optimize a model with 47795 rows, 13085 columns and 155393 nonzeros Presolve time: 0.16s Presolved: 47795 rows, 13085 columns, 155393 nonzeros Variable types: 0 continuous, 13085 integer (13085 binary) Root relaxation: objective 0.000000e+00, 539 iterations, 0.04 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 (915 simplex iterations) in 0.27 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 -- 79 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:06:41 2012 Optimize a model with 23675 rows, 6765 columns and 76713 nonzeros Presolve time: 0.13s Presolved: 23675 rows, 6765 columns, 76713 nonzeros Variable types: 0 continuous, 6765 integer (6765 binary) Root relaxation: objective 0.000000e+00, 517 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 (844 simplex iterations) in 0.18 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 -- 39 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:06:41 2012 Optimize a model with 11615 rows, 3605 columns and 37373 nonzeros Presolve time: 0.04s Presolved: 11615 rows, 3605 columns, 37373 nonzeros Variable types: 0 continuous, 3605 integer (3605 binary) Root relaxation: objective 0.000000e+00, 323 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 (584 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 19:06:41 2012 Optimize a model with 5585 rows, 2025 columns and 17703 nonzeros Presolve time: 0.02s Presolved: 5585 rows, 2025 columns, 17703 nonzeros Variable types: 0 continuous, 2025 integer (2025 binary) Root relaxation: objective 0.000000e+00, 345 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 (633 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 19:06:41 2012 Optimize a model with 2570 rows, 1235 columns and 7868 nonzeros Presolve time: 0.01s Presolved: 2570 rows, 1235 columns, 7868 nonzeros Variable types: 0 continuous, 1235 integer (1235 binary) Root relaxation: objective 0.000000e+00, 380 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 0 286 - 0.00000 - - 0s 0 0 0.00000 0 280 - 0.00000 - - 0s 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 0s 0 0 0.00000 0 269 - 0.00000 - - 0s 0 0 0.00000 0 369 - 0.00000 - - 0s 0 0 0.00000 0 346 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (9367 simplex iterations) in 0.71 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 19:06:42 2012 Optimize a model with 1364 rows, 919 columns and 3934 nonzeros Presolve removed 158 rows and 158 columns Presolve time: 0.00s Presolved: 1206 rows, 761 columns, 3618 nonzeros Variable types: 0 continuous, 761 integer (761 binary) Root relaxation: objective 0.000000e+00, 174 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 0 158 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (669 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 19:06:42 2012 Optimize a model with 1967 rows, 1077 columns and 5901 nonzeros Presolve time: 0.00s Presolved: 1967 rows, 1077 columns, 5901 nonzeros Variable types: 0 continuous, 1077 integer (1077 binary) Root relaxation: objective 0.000000e+00, 355 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 0 312 - 0.00000 - - 0s 0 0 0.00000 0 308 - 0.00000 - - 0s 0 0 0.00000 0 356 - 0.00000 - - 0s 0 0 0.00000 0 370 - 0.00000 - - 0s 0 0 0.00000 0 426 - 0.00000 - - 0s 0 0 0.00000 0 300 - 0.00000 - - 1s 0 0 0.00000 0 419 - 0.00000 - - 1s 0 0 0.00000 0 414 - 0.00000 - - 1s 0 0 0.00000 0 282 - 0.00000 - - 2s 0 0 0.00000 0 411 - 0.00000 - - 2s 0 0 0.00000 0 352 - 0.00000 - - 2s 0 2 0.00000 0 351 - 0.00000 - - 2s Cutting planes: Clique: 1 Zero half: 22 Explored 3 nodes (23274 simplex iterations) in 2.78 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 4