current bounds on the number of colors: 0 -- 171 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:22 2012 Optimize a model with 12921 rows, 14685 columns and 52785 nonzeros Presolve removed 27 rows and 2295 columns Presolve time: 0.11s Presolved: 12894 rows, 12390 columns, 50490 nonzeros Variable types: 0 continuous, 12390 integer (12390 binary) Root relaxation: objective 0.000000e+00, 261 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 (261 simplex iterations) in 0.12 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 -- 85 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:22 2012 Optimize a model with 6471 rows, 7332 columns and 26082 nonzeros Presolve removed 27 rows and 1134 columns Presolve time: 0.06s Presolved: 6444 rows, 6198 columns, 24948 nonzeros Variable types: 0 continuous, 6198 integer (6198 binary) Root relaxation: objective 0.000000e+00, 262 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 (262 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 -- 42 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:22 2012 Optimize a model with 3321 rows, 3741 columns and 13041 nonzeros Presolve removed 27 rows and 567 columns Presolve time: 0.02s Presolved: 3294 rows, 3174 columns, 12474 nonzeros Variable types: 0 continuous, 3174 integer (3174 binary) Root relaxation: objective 0.000000e+00, 261 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 (261 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 -- 21 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:22 2012 Optimize a model with 1671 rows, 1860 columns and 6210 nonzeros Presolve removed 27 rows and 270 columns Presolve time: 0.01s Presolved: 1644 rows, 1590 columns, 5940 nonzeros Variable types: 0 continuous, 1590 integer (1590 binary) Root relaxation: objective 0.000000e+00, 254 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 (254 simplex iterations) in 0.01 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 Sat Dec 15 16:23:22 2012 Optimize a model with 921 rows, 1005 columns and 3105 nonzeros Presolve removed 27 rows and 135 columns Presolve time: 0.00s Presolved: 894 rows, 870 columns, 2970 nonzeros Variable types: 0 continuous, 870 integer (870 binary) Root relaxation: objective 0.000000e+00, 227 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 (227 simplex iterations) in 0.00 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 Sat Dec 15 16:23:22 2012 Optimize a model with 471 rows, 492 columns and 1242 nonzeros Presolve removed 189 rows and 225 columns Presolve time: 0.00s Presolved: 282 rows, 267 columns, 846 nonzeros Variable types: 0 continuous, 267 integer (267 binary) Root relaxation: objective 0.000000e+00, 146 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 0 116 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (454 simplex iterations) in 0.00 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 Sat Dec 15 16:23:22 2012 Optimize a model with 621 rows, 663 columns and 1863 nonzeros Presolve removed 27 rows and 81 columns Presolve time: 0.00s Presolved: 594 rows, 582 columns, 1782 nonzeros Variable types: 0 continuous, 582 integer (582 binary) Root relaxation: objective 0.000000e+00, 244 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 (244 simplex iterations) in 0.00 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: 3