current bounds on the number of colors: 0 -- 159 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:13:14 2012 Optimize a model with 52220 rows, 13220 columns and 168744 nonzeros Presolve time: 0.17s Presolved: 52220 rows, 13220 columns, 168744 nonzeros Variable types: 0 continuous, 13220 integer (13220 binary) Root relaxation: objective 0.000000e+00, 596 iterations, 0.05 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 (958 simplex iterations) in 0.30 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 -- 79 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:13:15 2012 Optimize a model with 25860 rows, 6860 columns and 83304 nonzeros Presolve time: 0.13s Presolved: 25860 rows, 6860 columns, 83304 nonzeros Variable types: 0 continuous, 6860 integer (6860 binary) Root relaxation: objective 0.000000e+00, 453 iterations, 0.02 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 (912 simplex iterations) in 0.20 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 -- 39 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:13:15 2012 Optimize a model with 12680 rows, 3680 columns and 40584 nonzeros Presolve time: 0.05s Presolved: 12680 rows, 3680 columns, 40584 nonzeros Variable types: 0 continuous, 3680 integer (3680 binary) Root relaxation: objective 0.000000e+00, 337 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 (616 simplex iterations) in 0.07 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:13:16 2012 Optimize a model with 6090 rows, 2090 columns and 19224 nonzeros Presolve time: 0.02s Presolved: 6090 rows, 2090 columns, 19224 nonzeros Variable types: 0 continuous, 2090 integer (2090 binary) Root relaxation: objective 0.000000e+00, 340 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 (626 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:13:16 2012 Optimize a model with 2795 rows, 1295 columns and 8544 nonzeros Presolve time: 0.01s Presolved: 2795 rows, 1295 columns, 8544 nonzeros Variable types: 0 continuous, 1295 integer (1295 binary) Root relaxation: objective 0.000000e+00, 369 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 286 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 0s 0 0 0.00000 0 290 - 0.00000 - - 0s 0 0 0.00000 0 325 - 0.00000 - - 0s 0 0 0.00000 0 332 - 0.00000 - - 0s 0 0 0.00000 0 343 - 0.00000 - - 1s 0 0 0.00000 0 357 - 0.00000 - - 1s 0 0 0.00000 0 356 - 0.00000 - - 1s 0 2 0.00000 0 356 - 0.00000 - - 1s 805 170 0.00000 14 268 - 0.00000 - 76.3 5s 963 199 infeasible 31 - 0.00000 - 104 10s 1638 136 0.00000 33 260 - 0.00000 - 120 15s * 1972 0 33 0.0000000 0.00000 0.0% 124 17s Cutting planes: Gomory: 1 Clique: 1 Zero half: 13 Explored 1973 nodes (261544 simplex iterations) in 17.49 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 Fri Dec 14 19:13:33 2012 Optimize a model with 1477 rows, 977 columns and 4272 nonzeros Presolve removed 159 rows and 159 columns Presolve time: 0.00s Presolved: 1318 rows, 818 columns, 3954 nonzeros Variable types: 0 continuous, 818 integer (818 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 0.00000 0 159 - 0.00000 - - 0s Explored 0 nodes (668 simplex iterations) in 0.02 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 Fri Dec 14 19:13:33 2012 Optimize a model with 2136 rows, 1136 columns and 6408 nonzeros Presolve time: 0.01s Presolved: 2136 rows, 1136 columns, 6408 nonzeros Variable types: 0 continuous, 1136 integer (1136 binary) Root relaxation: objective 0.000000e+00, 367 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 312 - 0.00000 - - 0s 0 0 0.00000 0 310 - 0.00000 - - 0s 0 0 0.00000 0 416 - 0.00000 - - 0s 0 0 0.00000 0 432 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Zero half: 366 Explored 0 nodes (6138 simplex iterations) in 0.72 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 4