current bounds on the number of colors: 0 -- 160 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:21:23 2012 Optimize a model with 10400 rows, 12928 columns and 43520 nonzeros Presolve removed 32 rows and 2560 columns Presolve time: 0.11s Presolved: 10368 rows, 10368 columns, 40960 nonzeros Variable types: 0 continuous, 10368 integer (10368 binary) Root relaxation: objective 0.000000e+00, 219 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 (219 simplex iterations) in 0.12 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 -- 80 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:21:23 2012 Optimize a model with 5280 rows, 6528 columns and 21760 nonzeros Presolve removed 32 rows and 1280 columns Presolve time: 0.05s Presolved: 5248 rows, 5248 columns, 20480 nonzeros Variable types: 0 continuous, 5248 integer (5248 binary) Root relaxation: objective 0.000000e+00, 221 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 (221 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 -- 40 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:21:23 2012 Optimize a model with 2720 rows, 3328 columns and 10880 nonzeros Presolve removed 32 rows and 640 columns Presolve time: 0.02s Presolved: 2688 rows, 2688 columns, 10240 nonzeros Variable types: 0 continuous, 2688 integer (2688 binary) Root relaxation: objective 0.000000e+00, 220 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 (220 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 -- 20 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:21:24 2012 Optimize a model with 1440 rows, 1728 columns and 5440 nonzeros Presolve removed 32 rows and 320 columns Presolve time: 0.01s Presolved: 1408 rows, 1408 columns, 5120 nonzeros Variable types: 0 continuous, 1408 integer (1408 binary) Root relaxation: objective 0.000000e+00, 222 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 (222 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 -- 10 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:21:24 2012 Optimize a model with 800 rows, 928 columns and 2720 nonzeros Presolve removed 32 rows and 160 columns Presolve time: 0.00s Presolved: 768 rows, 768 columns, 2560 nonzeros Variable types: 0 continuous, 768 integer (768 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 (207 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:21:24 2012 Optimize a model with 416 rows, 448 columns and 1088 nonzeros Presolve removed 166 rows and 201 columns Presolve time: 0.00s Presolved: 250 rows, 247 columns, 750 nonzeros Variable types: 0 continuous, 247 integer (247 binary) Root relaxation: objective 0.000000e+00, 140 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 0 109 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (454 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:21:24 2012 Optimize a model with 544 rows, 608 columns and 1632 nonzeros Presolve removed 32 rows and 96 columns Presolve time: 0.00s Presolved: 512 rows, 512 columns, 1536 nonzeros Variable types: 0 continuous, 512 integer (512 binary) Root relaxation: objective 0.000000e+00, 199 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 (264 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