current bounds on the number of colors: 0 -- 165 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:58:57 2012 Optimize a model with 55843 rows, 14209 columns and 180564 nonzeros Presolve time: 0.17s Presolved: 55843 rows, 14209 columns, 180564 nonzeros Variable types: 0 continuous, 14209 integer (14209 binary) Root relaxation: objective 0.000000e+00, 585 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 (936 simplex iterations) in 0.29 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 19:58:58 2012 Optimize a model with 28004 rows, 7444 columns and 90282 nonzeros Presolve time: 0.14s Presolved: 28004 rows, 7444 columns, 90282 nonzeros Variable types: 0 continuous, 7444 integer (7444 binary) Root relaxation: objective 0.000000e+00, 505 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 (872 simplex iterations) in 0.20 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 19:58:58 2012 Optimize a model with 13745 rows, 3979 columns and 44040 nonzeros Presolve time: 0.05s Presolved: 13745 rows, 3979 columns, 44040 nonzeros Variable types: 0 continuous, 3979 integer (3979 binary) Root relaxation: objective 0.000000e+00, 352 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 (663 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 19:58:58 2012 Optimize a model with 6955 rows, 2329 columns and 22020 nonzeros Presolve time: 0.02s Presolved: 6955 rows, 2329 columns, 22020 nonzeros Variable types: 0 continuous, 2329 integer (2329 binary) Root relaxation: objective 0.000000e+00, 346 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 (803 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 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:58:59 2012 Optimize a model with 3560 rows, 1504 columns and 11010 nonzeros Presolve time: 0.01s Presolved: 3560 rows, 1504 columns, 11010 nonzeros Variable types: 0 continuous, 1504 integer (1504 binary) Root relaxation: objective 0.000000e+00, 363 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 (2220 simplex iterations) in 0.11 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 19:58:59 2012 Optimize a model with 1523 rows, 1009 columns and 4404 nonzeros Presolve removed 165 rows and 165 columns Presolve time: 0.00s Presolved: 1358 rows, 844 columns, 4074 nonzeros Variable types: 0 continuous, 844 integer (844 binary) Root relaxation: objective 0.000000e+00, 171 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 0 165 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (711 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 19:58:59 2012 Optimize a model with 2202 rows, 1174 columns and 6606 nonzeros Presolve time: 0.01s Presolved: 2202 rows, 1174 columns, 6606 nonzeros Variable types: 0 continuous, 1174 integer (1174 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 0.00000 0 328 - 0.00000 - - 0s 0 0 0.00000 0 322 - 0.00000 - - 0s 0 0 0.00000 0 413 - 0.00000 - - 0s 0 0 0.00000 0 456 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 1 Zero half: 424 Explored 0 nodes (6916 simplex iterations) in 0.82 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 19:59:00 2012 Optimize a model with 2881 rows, 1339 columns and 8808 nonzeros Presolve time: 0.01s Presolved: 2881 rows, 1339 columns, 8808 nonzeros Variable types: 0 continuous, 1339 integer (1339 binary) Root relaxation: objective 0.000000e+00, 382 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 0 304 - 0.00000 - - 0s 0 0 0.00000 0 312 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 0s 0 0 0.00000 0 286 - 0.00000 - - 1s 0 0 0.00000 0 348 - 0.00000 - - 1s 0 0 0.00000 0 373 - 0.00000 - - 1s 0 0 0.00000 0 373 - 0.00000 - - 2s 0 2 0.00000 0 373 - 0.00000 - - 2s 757 78 0.00000 19 218 - 0.00000 - 78.3 5s 1320 90 0.00000 21 210 - 0.00000 - 69.1 10s 1506 110 0.00000 29 268 - 0.00000 - 101 15s * 2022 2 29 0.0000000 0.00000 0.0% 112 18s Cutting planes: Gomory: 1 Zero half: 2 Explored 2023 nodes (247868 simplex iterations) in 18.88 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