current bounds on the number of colors: 0 -- 139 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:26 2012 Optimize a model with 7522 rows, 9698 columns and 31740 nonzeros Presolve removed 28 rows and 1932 columns Presolve time: 0.10s Presolved: 7494 rows, 7766 columns, 29808 nonzeros Variable types: 0 continuous, 7766 integer (7766 binary) Root relaxation: objective 0.000000e+00, 193 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 (193 simplex iterations) in 0.11 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 -- 69 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:26 2012 Optimize a model with 3777 rows, 4833 columns and 15640 nonzeros Presolve removed 28 rows and 952 columns Presolve time: 0.03s Presolved: 3749 rows, 3881 columns, 14688 nonzeros Variable types: 0 continuous, 3881 integer (3881 binary) Root relaxation: objective 0.000000e+00, 193 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 (193 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 -- 34 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:26 2012 Optimize a model with 1958 rows, 2470 columns and 7820 nonzeros Presolve removed 28 rows and 476 columns Presolve time: 0.01s Presolved: 1930 rows, 1994 columns, 7344 nonzeros Variable types: 0 continuous, 1994 integer (1994 binary) Root relaxation: objective 0.000000e+00, 193 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 (193 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 -- 17 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:26 2012 Optimize a model with 995 rows, 1219 columns and 3680 nonzeros Presolve removed 28 rows and 224 columns Presolve time: 0.00s Presolved: 967 rows, 995 columns, 3456 nonzeros Variable types: 0 continuous, 995 integer (995 binary) Root relaxation: objective 0.000000e+00, 193 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 (193 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 -- 8 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:26 2012 Optimize a model with 567 rows, 663 columns and 1840 nonzeros Presolve removed 28 rows and 112 columns Presolve time: 0.00s Presolved: 539 rows, 551 columns, 1728 nonzeros Variable types: 0 continuous, 551 integer (551 binary) Root relaxation: objective 0.000000e+00, 174 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 (238 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 16:18:26 2012 Optimize a model with 353 rows, 385 columns and 920 nonzeros Presolve removed 145 rows and 176 columns Presolve time: 0.00s Presolved: 208 rows, 209 columns, 624 nonzeros Variable types: 0 continuous, 209 integer (209 binary) Root relaxation: objective 0.000000e+00, 114 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 85 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (331 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 16:18:26 2012 Optimize a model with 460 rows, 524 columns and 1380 nonzeros Presolve removed 28 rows and 84 columns Presolve time: 0.00s Presolved: 432 rows, 440 columns, 1296 nonzeros Variable types: 0 continuous, 440 integer (440 binary) Root relaxation: objective 0.000000e+00, 169 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 (225 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