current bounds on the number of colors: 0 -- 141 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:44 2012 Optimize a model with 7981 rows, 9982 columns and 33390 nonzeros Presolve removed 32 rows and 2240 columns Presolve time: 0.10s Presolved: 7949 rows, 7742 columns, 31150 nonzeros Variable types: 0 continuous, 7742 integer (7742 binary) Root relaxation: objective 0.000000e+00, 192 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 (192 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 -- 70 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:44 2012 Optimize a model with 4061 rows, 5047 columns and 16695 nonzeros Presolve removed 32 rows and 1120 columns Presolve time: 0.03s Presolved: 4029 rows, 3927 columns, 15575 nonzeros Variable types: 0 continuous, 3927 integer (3927 binary) Root relaxation: objective 0.000000e+00, 192 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 (192 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 -- 35 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:44 2012 Optimize a model with 2045 rows, 2509 columns and 8109 nonzeros Presolve removed 32 rows and 544 columns Presolve time: 0.01s Presolved: 2013 rows, 1965 columns, 7565 nonzeros Variable types: 0 continuous, 1965 integer (1965 binary) Root relaxation: objective 0.000000e+00, 192 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 (192 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 -- 17 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:44 2012 Optimize a model with 1037 rows, 1240 columns and 3816 nonzeros Presolve removed 32 rows and 256 columns Presolve time: 0.00s Presolved: 1005 rows, 984 columns, 3560 nonzeros Variable types: 0 continuous, 984 integer (984 binary) Root relaxation: objective 0.000000e+00, 189 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 (189 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 -- 8 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:18:44 2012 Optimize a model with 589 rows, 676 columns and 1908 nonzeros Presolve removed 32 rows and 128 columns Presolve time: 0.00s Presolved: 557 rows, 548 columns, 1780 nonzeros Variable types: 0 continuous, 548 integer (548 binary) Root relaxation: objective 0.000000e+00, 166 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 (166 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 16:18:44 2012 Optimize a model with 365 rows, 394 columns and 954 nonzeros Presolve removed 147 rows and 182 columns Presolve time: 0.00s Presolved: 218 rows, 212 columns, 654 nonzeros Variable types: 0 continuous, 212 integer (212 binary) Root relaxation: objective 0.000000e+00, 115 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 93 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (344 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 16:18:44 2012 Optimize a model with 477 rows, 535 columns and 1431 nonzeros Presolve removed 32 rows and 96 columns Presolve time: 0.00s Presolved: 445 rows, 439 columns, 1335 nonzeros Variable types: 0 continuous, 439 integer (439 binary) Root relaxation: objective 0.000000e+00, 169 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 (169 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