current bounds on the number of colors: 0 -- 177 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:24:33 2012 Optimize a model with 13289 rows, 15725 columns and 54912 nonzeros Presolve removed 34 rows and 2992 columns Presolve time: 0.11s Presolved: 13255 rows, 12733 columns, 51920 nonzeros Variable types: 0 continuous, 12733 integer (12733 binary) Root relaxation: objective 0.000000e+00, 250 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 (250 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 -- 88 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:24:34 2012 Optimize a model with 6733 rows, 7937 columns and 27456 nonzeros Presolve removed 34 rows and 1496 columns Presolve time: 0.06s Presolved: 6699 rows, 6441 columns, 25960 nonzeros Variable types: 0 continuous, 6441 integer (6441 binary) Root relaxation: objective 0.000000e+00, 253 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 (253 simplex iterations) in 0.07 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 -- 44 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:24:34 2012 Optimize a model with 3455 rows, 4043 columns and 13728 nonzeros Presolve removed 34 rows and 748 columns Presolve time: 0.02s Presolved: 3421 rows, 3295 columns, 12980 nonzeros Variable types: 0 continuous, 3295 integer (3295 binary) Root relaxation: objective 0.000000e+00, 249 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 (249 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 -- 22 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:24:34 2012 Optimize a model with 1816 rows, 2096 columns and 6864 nonzeros Presolve removed 34 rows and 374 columns Presolve time: 0.01s Presolved: 1782 rows, 1722 columns, 6490 nonzeros Variable types: 0 continuous, 1722 integer (1722 binary) Root relaxation: objective 0.000000e+00, 249 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 (249 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 -- 11 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:24:34 2012 Optimize a model with 922 rows, 1034 columns and 3120 nonzeros Presolve removed 34 rows and 170 columns Presolve time: 0.00s Presolved: 888 rows, 864 columns, 2950 nonzeros Variable types: 0 continuous, 864 integer (864 binary) Root relaxation: objective 0.000000e+00, 231 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 (231 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 16:24:34 2012 Optimize a model with 475 rows, 503 columns and 1248 nonzeros Presolve removed 179 rows and 214 columns Presolve time: 0.00s Presolved: 296 rows, 289 columns, 888 nonzeros Variable types: 0 continuous, 289 integer (289 binary) Root relaxation: objective 0.000000e+00, 155 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 0 136 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (475 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:24:34 2012 Optimize a model with 624 rows, 680 columns and 1872 nonzeros Presolve removed 34 rows and 102 columns Presolve time: 0.00s Presolved: 590 rows, 578 columns, 1770 nonzeros Variable types: 0 continuous, 578 integer (578 binary) Root relaxation: objective 0.000000e+00, 223 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 (223 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