current bounds on the number of colors: 0 -- 154 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:53:55 2012 Optimize a model with 46277 rows, 12457 columns and 150227 nonzeros Presolve time: 0.16s Presolved: 46277 rows, 12457 columns, 150227 nonzeros Variable types: 0 continuous, 12457 integer (12457 binary) Root relaxation: objective 0.000000e+00, 543 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 (869 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 -- 77 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:53:56 2012 Optimize a model with 22916 rows, 6451 columns and 74138 nonzeros Presolve time: 0.12s Presolved: 22916 rows, 6451 columns, 74138 nonzeros Variable types: 0 continuous, 6451 integer (6451 binary) Root relaxation: objective 0.000000e+00, 464 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 (778 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 -- 38 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:53:57 2012 Optimize a model with 11535 rows, 3525 columns and 37069 nonzeros Presolve time: 0.04s Presolved: 11535 rows, 3525 columns, 37069 nonzeros Variable types: 0 continuous, 3525 integer (3525 binary) Root relaxation: objective 0.000000e+00, 311 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 (581 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 18:53:57 2012 Optimize a model with 5545 rows, 1985 columns and 17559 nonzeros Presolve time: 0.02s Presolved: 5545 rows, 1985 columns, 17559 nonzeros Variable types: 0 continuous, 1985 integer (1985 binary) Root relaxation: objective 0.000000e+00, 332 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 (603 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 18:53:57 2012 Optimize a model with 2550 rows, 1215 columns and 7804 nonzeros Presolve time: 0.01s Presolved: 2550 rows, 1215 columns, 7804 nonzeros Variable types: 0 continuous, 1215 integer (1215 binary) Root relaxation: objective 0.000000e+00, 349 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 0 233 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 0s 0 0 0.00000 0 272 - 0.00000 - - 0s 0 0 0.00000 0 342 - 0.00000 - - 0s 0 0 0.00000 0 241 - 0.00000 - - 1s 0 0 0.00000 0 286 - 0.00000 - - 1s 0 0 0.00000 0 317 - 0.00000 - - 1s 0 0 0.00000 0 265 - 0.00000 - - 1s 0 2 0.00000 0 265 - 0.00000 - - 1s * 210 2 23 0.0000000 0.00000 0.0% 73.6 2s Cutting planes: Clique: 1 Zero half: 46 Explored 211 nodes (32806 simplex iterations) in 2.43 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 18:53:59 2012 Optimize a model with 1352 rows, 907 columns and 3902 nonzeros Presolve removed 154 rows and 154 columns Presolve time: 0.00s Presolved: 1198 rows, 753 columns, 3594 nonzeros Variable types: 0 continuous, 753 integer (753 binary) Root relaxation: objective 0.000000e+00, 160 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 (650 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 18:53:59 2012 Optimize a model with 1951 rows, 1061 columns and 5853 nonzeros Presolve time: 0.00s Presolved: 1951 rows, 1061 columns, 5853 nonzeros Variable types: 0 continuous, 1061 integer (1061 binary) Root relaxation: objective 0.000000e+00, 331 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 0 298 - 0.00000 - - 0s 0 0 0.00000 0 316 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3689 simplex iterations) in 0.31 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