current bounds on the number of colors: 0 -- 159 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:12:54 2012 Optimize a model with 48823 rows, 13177 columns and 158553 nonzeros Presolve time: 0.16s Presolved: 48823 rows, 13177 columns, 158553 nonzeros Variable types: 0 continuous, 13177 integer (13177 binary) Root relaxation: objective 0.000000e+00, 549 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 (861 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 19:12:55 2012 Optimize a model with 24183 rows, 6817 columns and 78273 nonzeros Presolve time: 0.13s Presolved: 24183 rows, 6817 columns, 78273 nonzeros Variable types: 0 continuous, 6817 integer (6817 binary) Root relaxation: objective 0.000000e+00, 420 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 (728 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 19:12:56 2012 Optimize a model with 11863 rows, 3637 columns and 38133 nonzeros Presolve time: 0.04s Presolved: 11863 rows, 3637 columns, 38133 nonzeros Variable types: 0 continuous, 3637 integer (3637 binary) Root relaxation: objective 0.000000e+00, 324 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 (684 simplex iterations) in 0.08 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 19:12:56 2012 Optimize a model with 5703 rows, 2047 columns and 18063 nonzeros Presolve time: 0.02s Presolved: 5703 rows, 2047 columns, 18063 nonzeros Variable types: 0 continuous, 2047 integer (2047 binary) Root relaxation: objective 0.000000e+00, 337 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 (621 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 19:12:56 2012 Optimize a model with 2623 rows, 1252 columns and 8028 nonzeros Presolve time: 0.01s Presolved: 2623 rows, 1252 columns, 8028 nonzeros Variable types: 0 continuous, 1252 integer (1252 binary) Root relaxation: objective 0.000000e+00, 383 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 0 290 - 0.00000 - - 0s 0 0 0.00000 0 286 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 346 - 0.00000 - - 0s 0 0 0.00000 0 370 - 0.00000 - - 0s 0 0 0.00000 0 369 - 0.00000 - - 0s 0 0 0.00000 0 264 - 0.00000 - - 1s 0 0 0.00000 0 297 - 0.00000 - - 1s 0 0 0.00000 0 308 - 0.00000 - - 1s 0 0 0.00000 0 308 - 0.00000 - - 1s 0 2 0.00000 0 308 - 0.00000 - - 2s * 50 3 29 0.0000000 0.00000 0.0% 103 2s Cutting planes: Zero half: 25 Explored 51 nodes (24179 simplex iterations) in 2.38 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 19:12:59 2012 Optimize a model with 1391 rows, 934 columns and 4014 nonzeros Presolve removed 159 rows and 159 columns Presolve time: 0.00s Presolved: 1232 rows, 775 columns, 3696 nonzeros Variable types: 0 continuous, 775 integer (775 binary) Root relaxation: objective 0.000000e+00, 169 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 0 159 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (699 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 19:12:59 2012 Optimize a model with 2007 rows, 1093 columns and 6021 nonzeros Presolve time: 0.01s Presolved: 2007 rows, 1093 columns, 6021 nonzeros Variable types: 0 continuous, 1093 integer (1093 binary) Root relaxation: objective 0.000000e+00, 368 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 0 314 - 0.00000 - - 0s 0 0 0.00000 0 312 - 0.00000 - - 0s 0 0 0.00000 0 317 - 0.00000 - - 0s 0 0 0.00000 0 357 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Zero half: 249 Explored 0 nodes (6642 simplex iterations) in 0.65 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