current bounds on the number of colors: 0 -- 164 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:55:00 2012 Optimize a model with 54448 rows, 14110 columns and 176300 nonzeros Presolve time: 0.16s Presolved: 54448 rows, 14110 columns, 176300 nonzeros Variable types: 0 continuous, 14110 integer (14110 binary) Root relaxation: objective 0.000000e+00, 637 iterations, 0.06 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 (1017 simplex iterations) in 0.30 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 -- 82 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:55:01 2012 Optimize a model with 27306 rows, 7386 columns and 88150 nonzeros Presolve time: 0.14s Presolved: 27306 rows, 7386 columns, 88150 nonzeros Variable types: 0 continuous, 7386 integer (7386 binary) Root relaxation: objective 0.000000e+00, 444 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 (774 simplex iterations) in 0.19 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 -- 41 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:55:01 2012 Optimize a model with 13404 rows, 3942 columns and 43000 nonzeros Presolve time: 0.05s Presolved: 13404 rows, 3942 columns, 43000 nonzeros Variable types: 0 continuous, 3942 integer (3942 binary) Root relaxation: objective 0.000000e+00, 391 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 (705 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 -- 20 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:55:01 2012 Optimize a model with 6784 rows, 2302 columns and 21500 nonzeros Presolve time: 0.02s Presolved: 6784 rows, 2302 columns, 21500 nonzeros Variable types: 0 continuous, 2302 integer (2302 binary) Root relaxation: objective 0.000000e+00, 353 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 (653 simplex iterations) in 0.04 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 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:55:02 2012 Optimize a model with 3474 rows, 1482 columns and 10750 nonzeros Presolve time: 0.01s Presolved: 3474 rows, 1482 columns, 10750 nonzeros Variable types: 0 continuous, 1482 integer (1482 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1380 simplex iterations) in 0.05 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:55:02 2012 Optimize a model with 1488 rows, 990 columns and 4300 nonzeros Presolve removed 164 rows and 164 columns Presolve time: 0.00s Presolved: 1324 rows, 826 columns, 3972 nonzeros Variable types: 0 continuous, 826 integer (826 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 0 164 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (696 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:55:02 2012 Optimize a model with 2150 rows, 1154 columns and 6450 nonzeros Presolve time: 0.01s Presolved: 2150 rows, 1154 columns, 6450 nonzeros Variable types: 0 continuous, 1154 integer (1154 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 0 318 - 0.00000 - - 0s 0 0 0.00000 0 322 - 0.00000 - - 0s 0 0 0.00000 0 451 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 50 Zero half: 370 Explored 0 nodes (6080 simplex iterations) in 0.72 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:55:03 2012 Optimize a model with 2812 rows, 1318 columns and 8600 nonzeros Presolve time: 0.01s Presolved: 2812 rows, 1318 columns, 8600 nonzeros Variable types: 0 continuous, 1318 integer (1318 binary) Root relaxation: objective 0.000000e+00, 369 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 0 257 - 0.00000 - - 0s 0 0 0.00000 0 244 - 0.00000 - - 0s 0 0 0.00000 0 308 - 0.00000 - - 0s 0 0 0.00000 0 433 - 0.00000 - - 0s 0 0 0.00000 0 389 - 0.00000 - - 1s 0 0 0.00000 0 400 - 0.00000 - - 1s 0 0 0.00000 0 395 - 0.00000 - - 1s 0 2 0.00000 0 371 - 0.00000 - - 2s 605 169 0.00000 20 276 - 0.00000 - 65.5 5s 769 234 0.00000 26 267 - 0.00000 - 111 10s * 1323 3 29 0.0000000 0.00000 0.0% 114 13s Cutting planes: Zero half: 16 Explored 1324 nodes (168361 simplex iterations) in 13.48 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% optimal solution found: number of colors: 4