current bounds on the number of colors: 0 -- 152 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:16 2012 Optimize a model with 11020 rows, 11695 columns and 44156 nonzeros Presolve removed 21 rows and 1596 columns Presolve time: 0.11s Presolved: 10999 rows, 10099 columns, 42560 nonzeros Variable types: 0 continuous, 10099 integer (10099 binary) Root relaxation: objective 0.000000e+00, 237 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 (237 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 -- 76 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:16 2012 Optimize a model with 5586 rows, 5919 columns and 22078 nonzeros Presolve removed 21 rows and 798 columns Presolve time: 0.04s Presolved: 5565 rows, 5121 columns, 21280 nonzeros Variable types: 0 continuous, 5121 integer (5121 binary) Root relaxation: objective 0.000000e+00, 234 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 (234 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 -- 38 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:16 2012 Optimize a model with 2869 rows, 3031 columns and 11039 nonzeros Presolve removed 21 rows and 399 columns Presolve time: 0.02s Presolved: 2848 rows, 2632 columns, 10640 nonzeros Variable types: 0 continuous, 2632 integer (2632 binary) Root relaxation: objective 0.000000e+00, 237 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 (237 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 -- 19 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:16 2012 Optimize a model with 1439 rows, 1511 columns and 5229 nonzeros Presolve removed 21 rows and 189 columns Presolve time: 0.01s Presolved: 1418 rows, 1322 columns, 5040 nonzeros Variable types: 0 continuous, 1322 integer (1322 binary) Root relaxation: objective 0.000000e+00, 225 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 (320 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 -- 9 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:16 2012 Optimize a model with 724 rows, 751 columns and 2324 nonzeros Presolve removed 21 rows and 84 columns Presolve time: 0.00s Presolved: 703 rows, 667 columns, 2240 nonzeros Variable types: 0 continuous, 667 integer (667 binary) Root relaxation: objective 0.000000e+00, 204 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 (204 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 -- 4 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:16 2012 Optimize a model with 438 rows, 447 columns and 1162 nonzeros Presolve removed 160 rows and 185 columns Presolve time: 0.00s Presolved: 278 rows, 262 columns, 834 nonzeros Variable types: 0 continuous, 262 integer (262 binary) Root relaxation: objective 0.000000e+00, 138 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 0 111 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (447 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 -- 4 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:16 2012 Optimize a model with 581 rows, 599 columns and 1743 nonzeros Presolve removed 21 rows and 63 columns Presolve time: 0.00s Presolved: 560 rows, 536 columns, 1680 nonzeros Variable types: 0 continuous, 536 integer (536 binary) Root relaxation: objective 0.000000e+00, 208 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 (208 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