current bounds on the number of colors: 0 -- 142 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:11 2012 Optimize a model with 35074 rows, 10574 columns and 114878 nonzeros Presolve time: 0.14s Presolved: 35074 rows, 10574 columns, 114878 nonzeros Variable types: 0 continuous, 10574 integer (10574 binary) Root relaxation: objective 0.000000e+00, 460 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 (763 simplex iterations) in 0.22 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 -- 71 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:12 2012 Optimize a model with 17362 rows, 5462 columns and 56630 nonzeros Presolve time: 0.09s Presolved: 17362 rows, 5462 columns, 56630 nonzeros Variable types: 0 continuous, 5462 integer (5462 binary) Root relaxation: objective 0.000000e+00, 430 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 (728 simplex iterations) in 0.13 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 -- 35 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:12 2012 Optimize a model with 8506 rows, 2906 columns and 27506 nonzeros Presolve time: 0.03s Presolved: 8506 rows, 2906 columns, 27506 nonzeros Variable types: 0 continuous, 2906 integer (2906 binary) Root relaxation: objective 0.000000e+00, 310 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 (566 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 -- 17 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:12 2012 Optimize a model with 4078 rows, 1628 columns and 12944 nonzeros Presolve time: 0.01s Presolved: 4078 rows, 1628 columns, 12944 nonzeros Variable types: 0 continuous, 1628 integer (1628 binary) Root relaxation: objective 0.000000e+00, 304 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 (558 simplex iterations) in 0.02 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:12 2012 Optimize a model with 2110 rows, 1060 columns and 6472 nonzeros Presolve time: 0.01s Presolved: 2110 rows, 1060 columns, 6472 nonzeros Variable types: 0 continuous, 1060 integer (1060 binary) Root relaxation: objective 0.000000e+00, 332 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 0 264 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1349 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:41:12 2012 Optimize a model with 1126 rows, 776 columns and 3236 nonzeros Presolve removed 142 rows and 142 columns Presolve time: 0.00s Presolved: 984 rows, 634 columns, 2952 nonzeros Variable types: 0 continuous, 634 integer (634 binary) Root relaxation: objective 0.000000e+00, 149 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 0 142 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (636 simplex iterations) in 0.01 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 18:41:12 2012 Optimize a model with 1618 rows, 918 columns and 4854 nonzeros Presolve time: 0.00s Presolved: 1618 rows, 918 columns, 4854 nonzeros Variable types: 0 continuous, 918 integer (918 binary) Root relaxation: objective 0.000000e+00, 339 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 0 280 - 0.00000 - - 0s 0 0 0.00000 0 278 - 0.00000 - - 0s 0 0 0.00000 0 314 - 0.00000 - - 0s 0 0 0.00000 0 386 - 0.00000 - - 0s 0 0 0.00000 0 368 - 0.00000 - - 0s 0 0 0.00000 0 325 - 0.00000 - - 0s 0 0 0.00000 0 335 - 0.00000 - - 1s 0 0 0.00000 0 321 - 0.00000 - - 1s 0 0 0.00000 0 382 - 0.00000 - - 1s 0 0 0.00000 0 338 - 0.00000 - - 1s 0 0 0.00000 0 350 - 0.00000 - - 2s 0 0 0.00000 0 349 - 0.00000 - - 2s 0 2 0.00000 0 349 - 0.00000 - - 2s Cutting planes: Zero half: 54 Explored 9 nodes (21537 simplex iterations) in 2.32 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 4