current bounds on the number of colors: 0 -- 147 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:30 2012 Optimize a model with 6717 rows, 10821 columns and 30441 nonzeros Presolve removed 38 rows and 2774 columns Presolve time: 0.10s Presolved: 6679 rows, 8047 columns, 27667 nonzeros Variable types: 0 continuous, 8047 integer (8047 binary) Root relaxation: objective 0.000000e+00, 182 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 (182 simplex iterations) in 0.11 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 -- 73 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:30 2012 Optimize a model with 3387 rows, 5382 columns and 15012 nonzeros Presolve removed 38 rows and 1368 columns Presolve time: 0.03s Presolved: 3349 rows, 4014 columns, 13644 nonzeros Variable types: 0 continuous, 4014 integer (4014 binary) Root relaxation: objective 0.000000e+00, 182 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 (182 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 -- 36 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:30 2012 Optimize a model with 1767 rows, 2736 columns and 7506 nonzeros Presolve removed 38 rows and 684 columns Presolve time: 0.01s Presolved: 1729 rows, 2052 columns, 6822 nonzeros Variable types: 0 continuous, 2052 integer (2052 binary) Root relaxation: objective 0.000000e+00, 182 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 (182 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 -- 18 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:30 2012 Optimize a model with 957 rows, 1413 columns and 3753 nonzeros Presolve removed 38 rows and 342 columns Presolve time: 0.00s Presolved: 919 rows, 1071 columns, 3411 nonzeros Variable types: 0 continuous, 1071 integer (1071 binary) Root relaxation: objective 0.000000e+00, 183 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 (183 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 16:19:30 2012 Optimize a model with 507 rows, 678 columns and 1668 nonzeros Presolve removed 38 rows and 152 columns Presolve time: 0.00s Presolved: 469 rows, 526 columns, 1516 nonzeros Variable types: 0 continuous, 526 integer (526 binary) Root relaxation: objective 0.000000e+00, 163 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 (163 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 16:19:30 2012 Optimize a model with 327 rows, 384 columns and 834 nonzeros Presolve removed 169 rows and 218 columns Presolve time: 0.00s Presolved: 158 rows, 166 columns, 474 nonzeros Variable types: 0 continuous, 166 integer (166 binary) Root relaxation: objective 0.000000e+00, 72 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 18 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (187 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 -- 4 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:30 2012 Optimize a model with 417 rows, 531 columns and 1251 nonzeros Presolve removed 38 rows and 114 columns Presolve time: 0.00s Presolved: 379 rows, 417 columns, 1137 nonzeros Variable types: 0 continuous, 417 integer (417 binary) Root relaxation: objective 0.000000e+00, 149 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 (149 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