current bounds on the number of colors: 0 -- 145 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:17 2012 Optimize a model with 9073 rows, 10564 columns and 37224 nonzeros Presolve removed 29 rows and 2088 columns Presolve time: 0.11s Presolved: 9044 rows, 8476 columns, 35136 nonzeros Variable types: 0 continuous, 8476 integer (8476 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 0.11 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 -- 72 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:17 2012 Optimize a model with 4609 rows, 5344 columns and 18612 nonzeros Presolve removed 29 rows and 1044 columns Presolve time: 0.04s Presolved: 4580 rows, 4300 columns, 17568 nonzeros Variable types: 0 continuous, 4300 integer (4300 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 0.04 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 -- 36 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:17 2012 Optimize a model with 2377 rows, 2734 columns and 9306 nonzeros Presolve removed 29 rows and 522 columns Presolve time: 0.01s Presolved: 2348 rows, 2212 columns, 8784 nonzeros Variable types: 0 continuous, 2212 integer (2212 binary) Root relaxation: objective 0.000000e+00, 208 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 (208 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 -- 18 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:17 2012 Optimize a model with 1261 rows, 1429 columns and 4653 nonzeros Presolve removed 29 rows and 261 columns Presolve time: 0.01s Presolved: 1232 rows, 1168 columns, 4392 nonzeros Variable types: 0 continuous, 1168 integer (1168 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 (303 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 16:19:18 2012 Optimize a model with 641 rows, 704 columns and 2068 nonzeros Presolve removed 29 rows and 116 columns Presolve time: 0.00s Presolved: 612 rows, 588 columns, 1952 nonzeros Variable types: 0 continuous, 588 integer (588 binary) Root relaxation: objective 0.000000e+00, 195 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 (195 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 16:19:18 2012 Optimize a model with 393 rows, 414 columns and 1034 nonzeros Presolve removed 151 rows and 183 columns Presolve time: 0.00s Presolved: 242 rows, 231 columns, 726 nonzeros Variable types: 0 continuous, 231 integer (231 binary) Root relaxation: objective 0.000000e+00, 118 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 98 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (392 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 16:19:18 2012 Optimize a model with 517 rows, 559 columns and 1551 nonzeros Presolve removed 29 rows and 87 columns Presolve time: 0.00s Presolved: 488 rows, 472 columns, 1464 nonzeros Variable types: 0 continuous, 472 integer (472 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 0.00 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