current bounds on the number of colors: 0 -- 180 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:14 2012 Optimize a model with 15480 rows, 16370 columns and 62100 nonzeros Presolve removed 25 rows and 2250 columns Presolve time: 0.12s Presolved: 15455 rows, 14120 columns, 59850 nonzeros Variable types: 0 continuous, 14120 integer (14120 binary) Root relaxation: objective 0.000000e+00, 280 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 (280 simplex iterations) in 0.14 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 -- 90 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:14 2012 Optimize a model with 7830 rows, 8270 columns and 31050 nonzeros Presolve removed 25 rows and 1125 columns Presolve time: 0.07s Presolved: 7805 rows, 7145 columns, 29925 nonzeros Variable types: 0 continuous, 7145 integer (7145 binary) Root relaxation: objective 0.000000e+00, 280 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 (280 simplex iterations) in 0.08 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 -- 45 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:14 2012 Optimize a model with 3920 rows, 4130 columns and 15180 nonzeros Presolve removed 25 rows and 550 columns Presolve time: 0.02s Presolved: 3895 rows, 3580 columns, 14630 nonzeros Variable types: 0 continuous, 3580 integer (3580 binary) Root relaxation: objective 0.000000e+00, 280 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 (280 simplex iterations) in 0.03 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 16:25:14 2012 Optimize a model with 2050 rows, 2150 columns and 7590 nonzeros Presolve removed 25 rows and 275 columns Presolve time: 0.01s Presolved: 2025 rows, 1875 columns, 7315 nonzeros Variable types: 0 continuous, 1875 integer (1875 binary) Root relaxation: objective 0.000000e+00, 280 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 (280 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 16:25:14 2012 Optimize a model with 1030 rows, 1070 columns and 3450 nonzeros Presolve removed 25 rows and 125 columns Presolve time: 0.00s Presolved: 1005 rows, 945 columns, 3325 nonzeros Variable types: 0 continuous, 945 integer (945 binary) Root relaxation: objective 0.000000e+00, 247 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 (247 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 16:25:14 2012 Optimize a model with 520 rows, 530 columns and 1380 nonzeros Presolve removed 184 rows and 211 columns Presolve time: 0.00s Presolved: 336 rows, 319 columns, 1008 nonzeros Variable types: 0 continuous, 319 integer (319 binary) Root relaxation: objective 0.000000e+00, 165 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 (506 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 16:25:14 2012 Optimize a model with 690 rows, 710 columns and 2070 nonzeros Presolve removed 25 rows and 75 columns Presolve time: 0.00s Presolved: 665 rows, 635 columns, 1995 nonzeros Variable types: 0 continuous, 635 integer (635 binary) Root relaxation: objective 0.000000e+00, 271 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 (271 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