current bounds on the number of colors: 0 -- 176 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:24:26 2012 Optimize a model with 16456 rows, 15673 columns and 64328 nonzeros Presolve removed 19 rows and 1672 columns Presolve time: 0.12s Presolved: 16437 rows, 14001 columns, 62656 nonzeros Variable types: 0 continuous, 14001 integer (14001 binary) Root relaxation: objective 0.000000e+00, 292 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 (292 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 16:24:26 2012 Optimize a model with 8316 rows, 7929 columns and 32164 nonzeros Presolve removed 19 rows and 836 columns Presolve time: 0.07s Presolved: 8297 rows, 7093 columns, 31328 nonzeros Variable types: 0 continuous, 7093 integer (7093 binary) Root relaxation: objective 0.000000e+00, 288 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 (288 simplex iterations) in 0.08 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 16:24:26 2012 Optimize a model with 4246 rows, 4057 columns and 16082 nonzeros Presolve removed 19 rows and 418 columns Presolve time: 0.02s Presolved: 4227 rows, 3639 columns, 15664 nonzeros Variable types: 0 continuous, 3639 integer (3639 binary) Root relaxation: objective 0.000000e+00, 291 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 (291 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 16:24:27 2012 Optimize a model with 2211 rows, 2121 columns and 8041 nonzeros Presolve removed 19 rows and 209 columns Presolve time: 0.01s Presolved: 2192 rows, 1912 columns, 7832 nonzeros Variable types: 0 continuous, 1912 integer (1912 binary) Root relaxation: objective 0.000000e+00, 292 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 (292 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 16:24:27 2012 Optimize a model with 1101 rows, 1065 columns and 3655 nonzeros Presolve removed 19 rows and 95 columns Presolve time: 0.00s Presolved: 1082 rows, 970 columns, 3560 nonzeros Variable types: 0 continuous, 970 integer (970 binary) Root relaxation: objective 0.000000e+00, 249 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 (249 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 16:24:27 2012 Optimize a model with 546 rows, 537 columns and 1462 nonzeros Presolve removed 180 rows and 201 columns Presolve time: 0.00s Presolved: 366 rows, 336 columns, 1098 nonzeros Variable types: 0 continuous, 336 integer (336 binary) Root relaxation: objective 0.000000e+00, 178 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 0 150 - 0.00000 - - 0s Explored 0 nodes (568 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 16:24:27 2012 Optimize a model with 731 rows, 713 columns and 2193 nonzeros Presolve removed 19 rows and 57 columns Presolve time: 0.00s Presolved: 712 rows, 656 columns, 2136 nonzeros Variable types: 0 continuous, 656 integer (656 binary) Root relaxation: objective 0.000000e+00, 264 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