current bounds on the number of colors: 0 -- 93 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:23:11 2012 Optimize a model with 11501 rows, 4526 columns and 38502 nonzeros Presolve removed 1 rows and 46 columns Presolve time: 0.08s Presolved: 11500 rows, 4480 columns, 38456 nonzeros Variable types: 0 continuous, 4480 integer (4480 binary) Root relaxation: objective 0.000000e+00, 255 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 (255 simplex iterations) in 0.09 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 -- 46 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:23:11 2012 Optimize a model with 5797 rows, 2387 columns and 19251 nonzeros Presolve removed 1 rows and 23 columns Presolve time: 0.03s Presolved: 5796 rows, 2364 columns, 19228 nonzeros Variable types: 0 continuous, 2364 integer (2364 binary) Root relaxation: objective 0.000000e+00, 214 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 0.04 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% current bounds on the number of colors: 0 -- 23 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:23:11 2012 Optimize a model with 2821 rows, 1271 columns and 9207 nonzeros Presolve removed 1 rows and 11 columns Presolve time: 0.01s Presolved: 2820 rows, 1260 columns, 9196 nonzeros Variable types: 0 continuous, 1260 integer (1260 binary) Root relaxation: objective 0.000000e+00, 203 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 (349 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 -- 11 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:23:11 2012 Optimize a model with 1333 rows, 713 columns and 4185 nonzeros Presolve removed 1 rows and 5 columns Presolve time: 0.00s Presolved: 1332 rows, 708 columns, 4180 nonzeros Variable types: 0 continuous, 708 integer (708 binary) Root relaxation: objective 0.000000e+00, 223 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 (380 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 Fri Dec 14 18:23:11 2012 Optimize a model with 589 rows, 434 columns and 1674 nonzeros Presolve removed 93 rows and 94 columns Presolve time: 0.00s Presolved: 496 rows, 340 columns, 1488 nonzeros Variable types: 0 continuous, 340 integer (340 binary) Root relaxation: objective 0.000000e+00, 97 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 92 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (368 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 Fri Dec 14 18:23:11 2012 Optimize a model with 837 rows, 527 columns and 2511 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 836 rows, 524 columns, 2508 nonzeros Variable types: 0 continuous, 524 integer (524 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 0.00000 0 160 - 0.00000 - - 0s 0 0 0.00000 0 164 - 0.00000 - - 0s 0 0 0.00000 0 201 - 0.00000 - - 0s 0 0 0.00000 0 241 - 0.00000 - - 0s 0 0 0.00000 0 208 - 0.00000 - - 0s 0 0 0.00000 0 171 - 0.00000 - - 0s 0 0 0.00000 0 162 - 0.00000 - - 0s 0 0 0.00000 0 180 - 0.00000 - - 0s 0 0 0.00000 0 201 - 0.00000 - - 0s 0 0 0.00000 0 201 - 0.00000 - - 0s 0 2 0.00000 0 201 - 0.00000 - - 0s Cutting planes: Zero half: 14 Explored 11 nodes (7566 simplex iterations) in 0.46 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:23:12 2012 Optimize a model with 1085 rows, 620 columns and 3348 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 1084 rows, 616 columns, 3344 nonzeros Variable types: 0 continuous, 616 integer (616 binary) Root relaxation: objective 0.000000e+00, 211 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 (684 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% optimal solution found: number of colors: 4