current bounds on the number of colors: 0 -- 177 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:24:31 2012 Optimize a model with 15401 rows, 15749 columns and 61248 nonzeros Presolve removed 26 rows and 2288 columns Presolve time: 0.12s Presolved: 15375 rows, 13461 columns, 58960 nonzeros Variable types: 0 continuous, 13461 integer (13461 binary) Root relaxation: objective 0.000000e+00, 269 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 (269 simplex iterations) in 0.13 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 -- 88 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:24:31 2012 Optimize a model with 7789 rows, 7961 columns and 30624 nonzeros Presolve removed 26 rows and 1144 columns Presolve time: 0.07s Presolved: 7763 rows, 6817 columns, 29480 nonzeros Variable types: 0 continuous, 6817 integer (6817 binary) Root relaxation: objective 0.000000e+00, 269 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 (269 simplex iterations) in 0.07 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 -- 44 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:24:31 2012 Optimize a model with 3983 rows, 4067 columns and 15312 nonzeros Presolve removed 26 rows and 572 columns Presolve time: 0.02s Presolved: 3957 rows, 3495 columns, 14740 nonzeros Variable types: 0 continuous, 3495 integer (3495 binary) Root relaxation: objective 0.000000e+00, 275 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 (275 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 16:24:32 2012 Optimize a model with 2080 rows, 2120 columns and 7656 nonzeros Presolve removed 26 rows and 286 columns Presolve time: 0.01s Presolved: 2054 rows, 1834 columns, 7370 nonzeros Variable types: 0 continuous, 1834 integer (1834 binary) Root relaxation: objective 0.000000e+00, 256 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 (256 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 16:24:32 2012 Optimize a model with 1042 rows, 1058 columns and 3480 nonzeros Presolve removed 26 rows and 130 columns Presolve time: 0.00s Presolved: 1016 rows, 928 columns, 3350 nonzeros Variable types: 0 continuous, 928 integer (928 binary) Root relaxation: objective 0.000000e+00, 254 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 (254 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 16:24:32 2012 Optimize a model with 523 rows, 527 columns and 1392 nonzeros Presolve removed 183 rows and 212 columns Presolve time: 0.00s Presolved: 340 rows, 315 columns, 1020 nonzeros Variable types: 0 continuous, 315 integer (315 binary) Root relaxation: objective 0.000000e+00, 159 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 0 130 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (516 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 16:24:32 2012 Optimize a model with 696 rows, 704 columns and 2088 nonzeros Presolve removed 26 rows and 78 columns Presolve time: 0.00s Presolved: 670 rows, 626 columns, 2010 nonzeros Variable types: 0 continuous, 626 integer (626 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 0.00 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