current bounds on the number of colors: 0 -- 163 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:45:19 2012 Optimize a model with 53785 rows, 13865 columns and 174069 nonzeros Presolve time: 0.17s Presolved: 53785 rows, 13865 columns, 174069 nonzeros Variable types: 0 continuous, 13865 integer (13865 binary) Root relaxation: objective 0.000000e+00, 611 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 (965 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 -- 81 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:45:20 2012 Optimize a model with 26643 rows, 7182 columns and 85960 nonzeros Presolve time: 0.13s Presolved: 26643 rows, 7182 columns, 85960 nonzeros Variable types: 0 continuous, 7182 integer (7182 binary) Root relaxation: objective 0.000000e+00, 519 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 (888 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 -- 40 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:45:20 2012 Optimize a model with 13403 rows, 3922 columns and 42980 nonzeros Presolve time: 0.05s Presolved: 13403 rows, 3922 columns, 42980 nonzeros Variable types: 0 continuous, 3922 integer (3922 binary) Root relaxation: objective 0.000000e+00, 362 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 (645 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 19:45:20 2012 Optimize a model with 6783 rows, 2292 columns and 21490 nonzeros Presolve time: 0.02s Presolved: 6783 rows, 2292 columns, 21490 nonzeros Variable types: 0 continuous, 2292 integer (2292 binary) Root relaxation: objective 0.000000e+00, 349 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 (639 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 19:45:21 2012 Optimize a model with 3473 rows, 1477 columns and 10745 nonzeros Presolve time: 0.01s Presolved: 3473 rows, 1477 columns, 10745 nonzeros Variable types: 0 continuous, 1477 integer (1477 binary) Root relaxation: objective 0.000000e+00, 367 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 (1730 simplex iterations) in 0.06 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 19:45:21 2012 Optimize a model with 1487 rows, 988 columns and 4298 nonzeros Presolve removed 163 rows and 163 columns Presolve time: 0.00s Presolved: 1324 rows, 825 columns, 3972 nonzeros Variable types: 0 continuous, 825 integer (825 binary) Root relaxation: objective 0.000000e+00, 176 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 0 163 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (703 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 19:45:21 2012 Optimize a model with 2149 rows, 1151 columns and 6447 nonzeros Presolve time: 0.01s Presolved: 2149 rows, 1151 columns, 6447 nonzeros Variable types: 0 continuous, 1151 integer (1151 binary) Root relaxation: objective 0.000000e+00, 369 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 0 322 - 0.00000 - - 0s 0 0 0.00000 0 322 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3481 simplex iterations) in 0.32 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 19:45:21 2012 Optimize a model with 2811 rows, 1314 columns and 8596 nonzeros Presolve time: 0.01s Presolved: 2811 rows, 1314 columns, 8596 nonzeros Variable types: 0 continuous, 1314 integer (1314 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 0 314 - 0.00000 - - 0s 0 0 0.00000 0 310 - 0.00000 - - 0s 0 0 0.00000 0 278 - 0.00000 - - 0s 0 0 0.00000 0 312 - 0.00000 - - 0s 0 0 0.00000 0 315 - 0.00000 - - 0s 0 0 0.00000 0 229 - 0.00000 - - 1s 0 0 0.00000 0 294 - 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 - - 1s * 445 4 32 0.0000000 0.00000 0.0% 93.2 3s Cutting planes: Zero half: 35 Explored 446 nodes (59171 simplex iterations) in 3.77 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