current bounds on the number of colors: 0 -- 157 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:01:44 2012 Optimize a model with 47737 rows, 12856 columns and 154986 nonzeros Presolve time: 0.16s Presolved: 47737 rows, 12856 columns, 154986 nonzeros Variable types: 0 continuous, 12856 integer (12856 binary) Root relaxation: objective 0.000000e+00, 552 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 (872 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 -- 78 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:01:45 2012 Optimize a model with 23947 rows, 6733 columns and 77493 nonzeros Presolve time: 0.13s Presolved: 23947 rows, 6733 columns, 77493 nonzeros Variable types: 0 continuous, 6733 integer (6733 binary) Root relaxation: objective 0.000000e+00, 393 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 (696 simplex iterations) in 0.17 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 19:01:45 2012 Optimize a model with 11747 rows, 3593 columns and 37753 nonzeros Presolve time: 0.04s Presolved: 11747 rows, 3593 columns, 37753 nonzeros Variable types: 0 continuous, 3593 integer (3593 binary) Root relaxation: objective 0.000000e+00, 327 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 (605 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 19:01:46 2012 Optimize a model with 5647 rows, 2023 columns and 17883 nonzeros Presolve time: 0.02s Presolved: 5647 rows, 2023 columns, 17883 nonzeros Variable types: 0 continuous, 2023 integer (2023 binary) Root relaxation: objective 0.000000e+00, 339 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 (616 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 19:01:46 2012 Optimize a model with 2597 rows, 1238 columns and 7948 nonzeros Presolve time: 0.01s Presolved: 2597 rows, 1238 columns, 7948 nonzeros Variable types: 0 continuous, 1238 integer (1238 binary) Root relaxation: objective 0.000000e+00, 373 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 0 298 - 0.00000 - - 0s 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 0.00000 0 303 - 0.00000 - - 0s 0 0 0.00000 0 289 - 0.00000 - - 0s 0 0 0.00000 0 299 - 0.00000 - - 0s 0 0 0.00000 0 318 - 0.00000 - - 0s 0 0 0.00000 0 318 - 0.00000 - - 1s 0 2 0.00000 0 318 - 0.00000 - - 1s * 274 2 25 0.0000000 0.00000 0.0% 55.2 1s Cutting planes: Gomory: 1 Zero half: 23 Explored 275 nodes (26604 simplex iterations) in 1.97 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 19:01:48 2012 Optimize a model with 1377 rows, 924 columns and 3974 nonzeros Presolve removed 157 rows and 157 columns Presolve time: 0.00s Presolved: 1220 rows, 767 columns, 3660 nonzeros Variable types: 0 continuous, 767 integer (767 binary) Root relaxation: objective 0.000000e+00, 165 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 0 157 - 0.00000 - - 0s Explored 0 nodes (664 simplex iterations) in 0.02 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 19:01:48 2012 Optimize a model with 1987 rows, 1081 columns and 5961 nonzeros Presolve time: 0.01s Presolved: 1987 rows, 1081 columns, 5961 nonzeros Variable types: 0 continuous, 1081 integer (1081 binary) Root relaxation: objective 0.000000e+00, 379 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 0 308 - 0.00000 - - 0s 0 0 0.00000 0 296 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 429 - 0.00000 - - 0s 0 0 0.00000 0 355 - 0.00000 - - 0s 0 0 0.00000 0 411 - 0.00000 - - 1s 0 0 0.00000 0 424 - 0.00000 - - 1s 0 0 0.00000 0 401 - 0.00000 - - 2s 0 0 0.00000 0 385 - 0.00000 - - 2s 0 0 0.00000 0 402 - 0.00000 - - 2s 0 0 0.00000 0 418 - 0.00000 - - 3s Cutting planes: Zero half: 15 Explored 0 nodes (23138 simplex iterations) in 3.17 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