current bounds on the number of colors: 0 -- 158 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:21:11 2012 Optimize a model with 12245 rows, 12635 columns and 48743 nonzeros Presolve removed 23 rows and 1817 columns Presolve time: 0.12s Presolved: 12222 rows, 10818 columns, 46926 nonzeros Variable types: 0 continuous, 10818 integer (10818 binary) Root relaxation: objective 0.000000e+00, 243 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 (243 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 -- 79 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:21:11 2012 Optimize a model with 6125 rows, 6315 columns and 24063 nonzeros Presolve removed 23 rows and 897 columns Presolve time: 0.05s Presolved: 6102 rows, 5418 columns, 23166 nonzeros Variable types: 0 continuous, 5418 integer (5418 binary) Root relaxation: objective 0.000000e+00, 245 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 (245 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 -- 39 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:21:11 2012 Optimize a model with 3065 rows, 3155 columns and 11723 nonzeros Presolve removed 23 rows and 437 columns Presolve time: 0.02s Presolved: 3042 rows, 2718 columns, 11286 nonzeros Variable types: 0 continuous, 2718 integer (2718 binary) Root relaxation: objective 0.000000e+00, 243 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 (243 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 -- 19 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:21:11 2012 Optimize a model with 1535 rows, 1575 columns and 5553 nonzeros Presolve removed 23 rows and 207 columns Presolve time: 0.01s Presolved: 1512 rows, 1368 columns, 5346 nonzeros Variable types: 0 continuous, 1368 integer (1368 binary) Root relaxation: objective 0.000000e+00, 243 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 (243 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 -- 9 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:21:11 2012 Optimize a model with 770 rows, 785 columns and 2468 nonzeros Presolve removed 23 rows and 92 columns Presolve time: 0.00s Presolved: 747 rows, 693 columns, 2376 nonzeros Variable types: 0 continuous, 693 integer (693 binary) Root relaxation: objective 0.000000e+00, 213 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 (213 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 16:21:11 2012 Optimize a model with 464 rows, 469 columns and 1234 nonzeros Presolve removed 164 rows and 190 columns Presolve time: 0.00s Presolved: 300 rows, 279 columns, 900 nonzeros Variable types: 0 continuous, 279 integer (279 binary) Root relaxation: objective 0.000000e+00, 142 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 0 117 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (457 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 -- 4 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:21:11 2012 Optimize a model with 617 rows, 627 columns and 1851 nonzeros Presolve removed 23 rows and 69 columns Presolve time: 0.00s Presolved: 594 rows, 558 columns, 1782 nonzeros Variable types: 0 continuous, 558 integer (558 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (323 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