current bounds on the number of colors: 0 -- 103 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:19 2012 Optimize a model with 2959 rows, 5309 columns and 13821 nonzeros Presolve removed 33 rows and 1683 columns Presolve time: 0.03s Presolved: 2926 rows, 3626 columns, 12138 nonzeros Variable types: 0 continuous, 3626 integer (3626 binary) Root relaxation: objective 0.000000e+00, 119 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 (119 simplex iterations) in 0.04 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 -- 51 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:19 2012 Optimize a model with 1503 rows, 2631 columns and 6775 nonzeros Presolve removed 33 rows and 825 columns Presolve time: 0.01s Presolved: 1470 rows, 1806 columns, 5950 nonzeros Variable types: 0 continuous, 1806 integer (1806 binary) Root relaxation: objective 0.000000e+00, 118 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 (118 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 -- 25 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:19 2012 Optimize a model with 775 rows, 1292 columns and 3252 nonzeros Presolve removed 33 rows and 396 columns Presolve time: 0.00s Presolved: 742 rows, 896 columns, 2856 nonzeros Variable types: 0 continuous, 896 integer (896 binary) Root relaxation: objective 0.000000e+00, 120 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 (120 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 -- 12 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:19 2012 Optimize a model with 439 rows, 674 columns and 1626 nonzeros Presolve removed 33 rows and 198 columns Presolve time: 0.00s Presolved: 406 rows, 476 columns, 1428 nonzeros Variable types: 0 continuous, 476 integer (476 binary) Root relaxation: objective 0.000000e+00, 107 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 (107 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 -- 6 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:19 2012 Optimize a model with 271 rows, 365 columns and 813 nonzeros Presolve removed 33 rows and 99 columns Presolve time: 0.00s Presolved: 238 rows, 266 columns, 714 nonzeros Variable types: 0 continuous, 266 integer (266 binary) Root relaxation: objective 0.000000e+00, 104 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 (104 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 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:19 2012 Optimize a model with 159 rows, 159 columns and 271 nonzeros Presolve removed 159 rows and 159 columns Presolve time: 0.00s Explored 0 nodes (0 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 1 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:19 2012 Optimize a model with 215 rows, 262 columns and 542 nonzeros Presolve removed 115 rows and 154 columns Presolve time: 0.00s Presolved: 100 rows, 108 columns, 300 nonzeros Variable types: 0 continuous, 108 integer (108 binary) Root relaxation: objective 0.000000e+00, 50 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 (50 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: 2