current bounds on the number of colors: 0 -- 172 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:28 2012 Optimize a model with 13072 rows, 14942 columns and 53492 nonzeros Presolve removed 29 rows and 2494 columns Presolve time: 0.11s Presolved: 13043 rows, 12448 columns, 50998 nonzeros Variable types: 0 continuous, 12448 integer (12448 binary) Root relaxation: objective 0.000000e+00, 255 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 (255 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 -- 86 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:29 2012 Optimize a model with 6622 rows, 7546 columns and 26746 nonzeros Presolve removed 29 rows and 1247 columns Presolve time: 0.06s Presolved: 6593 rows, 6299 columns, 25499 nonzeros Variable types: 0 continuous, 6299 integer (6299 binary) Root relaxation: objective 0.000000e+00, 255 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 (255 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 -- 43 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:29 2012 Optimize a model with 3322 rows, 3762 columns and 13062 nonzeros Presolve removed 29 rows and 609 columns Presolve time: 0.02s Presolved: 3293 rows, 3153 columns, 12453 nonzeros Variable types: 0 continuous, 3153 integer (3153 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 0.02 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 16:23:29 2012 Optimize a model with 1672 rows, 1870 columns and 6220 nonzeros Presolve removed 29 rows and 290 columns Presolve time: 0.01s Presolved: 1643 rows, 1580 columns, 5930 nonzeros Variable types: 0 continuous, 1580 integer (1580 binary) Root relaxation: objective 0.000000e+00, 251 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 (251 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 16:23:29 2012 Optimize a model with 922 rows, 1010 columns and 3110 nonzeros Presolve removed 29 rows and 145 columns Presolve time: 0.00s Presolved: 893 rows, 865 columns, 2965 nonzeros Variable types: 0 continuous, 865 integer (865 binary) Root relaxation: objective 0.000000e+00, 242 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 (340 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:29 2012 Optimize a model with 472 rows, 494 columns and 1244 nonzeros Presolve removed 184 rows and 219 columns Presolve time: 0.00s Presolved: 288 rows, 275 columns, 864 nonzeros Variable types: 0 continuous, 275 integer (275 binary) Root relaxation: objective 0.000000e+00, 148 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 0 113 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (464 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 16:23:29 2012 Optimize a model with 622 rows, 666 columns and 1866 nonzeros Presolve removed 29 rows and 87 columns Presolve time: 0.00s Presolved: 593 rows, 579 columns, 1779 nonzeros Variable types: 0 continuous, 579 integer (579 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 (385 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% optimal solution found: number of colors: 3