current bounds on the number of colors: 0 -- 166 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:08:13 2012 Optimize a model with 57021 rows, 14463 columns and 184343 nonzeros Presolve time: 0.17s Presolved: 57021 rows, 14463 columns, 184343 nonzeros Variable types: 0 continuous, 14463 integer (14463 binary) Root relaxation: objective 0.000000e+00, 612 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 (975 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 -- 83 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:08:14 2012 Optimize a model with 28251 rows, 7491 columns and 91061 nonzeros Presolve time: 0.13s Presolved: 28251 rows, 7491 columns, 91061 nonzeros Variable types: 0 continuous, 7491 integer (7491 binary) Root relaxation: objective 0.000000e+00, 536 iterations, 0.03 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 (880 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 20:08:14 2012 Optimize a model with 13866 rows, 4005 columns and 44420 nonzeros Presolve time: 0.05s Presolved: 13866 rows, 4005 columns, 44420 nonzeros Variable types: 0 continuous, 4005 integer (4005 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 (674 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 20:08:15 2012 Optimize a model with 7016 rows, 2345 columns and 22210 nonzeros Presolve time: 0.02s Presolved: 7016 rows, 2345 columns, 22210 nonzeros Variable types: 0 continuous, 2345 integer (2345 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 (647 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 20:08:15 2012 Optimize a model with 3591 rows, 1515 columns and 11105 nonzeros Presolve time: 0.01s Presolved: 3591 rows, 1515 columns, 11105 nonzeros Variable types: 0 continuous, 1515 integer (1515 binary) Root relaxation: objective 0.000000e+00, 357 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 0 113 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (3224 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:08:15 2012 Optimize a model with 1536 rows, 1017 columns and 4442 nonzeros Presolve removed 166 rows and 166 columns Presolve time: 0.00s Presolved: 1370 rows, 851 columns, 4110 nonzeros Variable types: 0 continuous, 851 integer (851 binary) Root relaxation: objective 0.000000e+00, 173 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 0 166 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (698 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 20:08:15 2012 Optimize a model with 2221 rows, 1183 columns and 6663 nonzeros Presolve time: 0.01s Presolved: 2221 rows, 1183 columns, 6663 nonzeros Variable types: 0 continuous, 1183 integer (1183 binary) Root relaxation: objective 0.000000e+00, 401 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 0 258 - 0.00000 - - 0s 0 0 0.00000 0 324 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (4753 simplex iterations) in 0.36 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 20:08:16 2012 Optimize a model with 2906 rows, 1349 columns and 8884 nonzeros Presolve time: 0.01s Presolved: 2906 rows, 1349 columns, 8884 nonzeros Variable types: 0 continuous, 1349 integer (1349 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 0 249 - 0.00000 - - 0s 0 0 0.00000 0 170 - 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 0 292 - 0.00000 - - 1s 0 0 0.00000 0 290 - 0.00000 - - 1s 0 0 0.00000 0 280 - 0.00000 - - 1s 0 0 0.00000 0 268 - 0.00000 - - 1s 0 0 0.00000 0 270 - 0.00000 - - 1s 0 0 0.00000 0 260 - 0.00000 - - 2s 0 0 0.00000 0 260 - 0.00000 - - 2s 0 0 0.00000 0 260 - 0.00000 - - 2s 0 2 0.00000 0 260 - 0.00000 - - 2s 605 112 0.00000 21 266 - 0.00000 - 67.8 5s 611 116 0.00000 19 376 - 0.00000 - 67.1 10s * 1116 0 25 0.0000000 0.00000 0.0% 127 14s Cutting planes: Zero half: 1 Explored 1117 nodes (169898 simplex iterations) in 14.79 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