current bounds on the number of colors: 0 -- 156 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:58:58 2012 Optimize a model with 50076 rows, 12808 columns and 161928 nonzeros Presolve time: 0.16s Presolved: 50076 rows, 12808 columns, 161928 nonzeros Variable types: 0 continuous, 12808 integer (12808 binary) Root relaxation: objective 0.000000e+00, 580 iterations, 0.05 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 (1022 simplex iterations) in 0.32 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 18:58:59 2012 Optimize a model with 25116 rows, 6724 columns and 80964 nonzeros Presolve time: 0.13s Presolved: 25116 rows, 6724 columns, 80964 nonzeros Variable types: 0 continuous, 6724 integer (6724 binary) Root relaxation: objective 0.000000e+00, 419 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 (734 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 18:59:00 2012 Optimize a model with 12316 rows, 3604 columns and 39444 nonzeros Presolve time: 0.05s Presolved: 12316 rows, 3604 columns, 39444 nonzeros Variable types: 0 continuous, 3604 integer (3604 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 (597 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 18:59:00 2012 Optimize a model with 5916 rows, 2044 columns and 18684 nonzeros Presolve time: 0.02s Presolved: 5916 rows, 2044 columns, 18684 nonzeros Variable types: 0 continuous, 2044 integer (2044 binary) Root relaxation: objective 0.000000e+00, 334 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 (610 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 18:59:00 2012 Optimize a model with 2716 rows, 1264 columns and 8304 nonzeros Presolve time: 0.01s Presolved: 2716 rows, 1264 columns, 8304 nonzeros Variable types: 0 continuous, 1264 integer (1264 binary) Root relaxation: objective 0.000000e+00, 354 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 0 288 - 0.00000 - - 0s 0 0 0.00000 0 296 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 311 - 0.00000 - - 0s 0 0 0.00000 0 346 - 0.00000 - - 0s 0 0 0.00000 0 376 - 0.00000 - - 1s 0 0 0.00000 0 376 - 0.00000 - - 1s 0 2 0.00000 0 376 - 0.00000 - - 1s 616 44 0.00000 10 368 - 0.00000 - 53.0 5s * 654 37 26 0.0000000 0.00000 0.0% 88.6 8s Cutting planes: Gomory: 1 Zero half: 11 Explored 655 nodes (72209 simplex iterations) in 8.39 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 18:59:08 2012 Optimize a model with 1436 rows, 952 columns and 4152 nonzeros Presolve removed 156 rows and 156 columns Presolve time: 0.00s Presolved: 1280 rows, 796 columns, 3840 nonzeros Variable types: 0 continuous, 796 integer (796 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 0 156 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 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 18:59:08 2012 Optimize a model with 2076 rows, 1108 columns and 6228 nonzeros Presolve time: 0.01s Presolved: 2076 rows, 1108 columns, 6228 nonzeros Variable types: 0 continuous, 1108 integer (1108 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 0 306 - 0.00000 - - 0s 0 0 0.00000 0 306 - 0.00000 - - 0s 0 0 0.00000 0 390 - 0.00000 - - 0s 0 0 0.00000 0 414 - 0.00000 - - 0s 0 0 0.00000 0 419 - 0.00000 - - 0s 0 0 0.00000 0 392 - 0.00000 - - 1s 0 0 0.00000 0 393 - 0.00000 - - 1s 0 0 0.00000 0 399 - 0.00000 - - 2s 0 0 0.00000 0 396 - 0.00000 - - 2s 0 0 0.00000 0 388 - 0.00000 - - 2s 0 0 infeasible 0 - 0.10000 - - 2s Cutting planes: Zero half: 621 Explored 0 nodes (21026 simplex iterations) in 2.89 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