current bounds on the number of colors: 0 -- 104 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:31 2012 Optimize a model with 15704 rows, 5708 columns and 52208 nonzeros Presolve removed 2 rows and 104 columns Presolve time: 0.11s Presolved: 15702 rows, 5604 columns, 52104 nonzeros Variable types: 0 continuous, 5604 integer (5604 binary) Root relaxation: objective 0.000000e+00, 315 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 (501 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 -- 52 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:32 2012 Optimize a model with 7904 rows, 3004 columns and 26104 nonzeros Presolve removed 2 rows and 52 columns Presolve time: 0.04s Presolved: 7902 rows, 2952 columns, 26052 nonzeros Variable types: 0 continuous, 2952 integer (2952 binary) Root relaxation: objective 0.000000e+00, 244 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 (426 simplex iterations) in 0.05 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 -- 26 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:32 2012 Optimize a model with 4004 rows, 1652 columns and 13052 nonzeros Presolve removed 2 rows and 26 columns Presolve time: 0.01s Presolved: 4002 rows, 1626 columns, 13026 nonzeros Variable types: 0 continuous, 1626 integer (1626 binary) Root relaxation: objective 0.000000e+00, 207 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 (365 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 -- 13 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:32 2012 Optimize a model with 1904 rows, 924 columns and 6024 nonzeros Presolve removed 2 rows and 12 columns Presolve time: 0.01s Presolved: 1902 rows, 912 columns, 6012 nonzeros Variable types: 0 continuous, 912 integer (912 binary) Root relaxation: objective 0.000000e+00, 244 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 (424 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 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:32 2012 Optimize a model with 1004 rows, 612 columns and 3012 nonzeros Presolve removed 2 rows and 6 columns Presolve time: 0.00s Presolved: 1002 rows, 606 columns, 3006 nonzeros Variable types: 0 continuous, 606 integer (606 binary) Root relaxation: objective 0.000000e+00, 228 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 0 200 - 0.00000 - - 0s 0 0 0.00000 0 192 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1812 simplex iterations) in 0.08 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: 3 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:32 2012 Optimize a model with 1304 rows, 716 columns and 4016 nonzeros Presolve removed 2 rows and 8 columns Presolve time: 0.00s Presolved: 1302 rows, 708 columns, 4008 nonzeros Variable types: 0 continuous, 708 integer (708 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 0.00000 0 51 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1388 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% optimal solution found: number of colors: 4