current bounds on the number of colors: 0 -- 185 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 02:57:21 2012 Optimize a model with 78845 rows, 17875 columns and 253000 nonzeros Presolve time: 0.25s Presolved: 78845 rows, 17875 columns, 253000 nonzeros Variable types: 0 continuous, 17875 integer (17875 binary) Root relaxation: objective 0.000000e+00, 716 iterations, 0.08 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 (1148 simplex iterations) in 0.44 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 -- 92 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 02:57:22 2012 Optimize a model with 39515 rows, 9365 columns and 126500 nonzeros Presolve time: 0.16s Presolved: 39515 rows, 9365 columns, 126500 nonzeros Variable types: 0 continuous, 9365 integer (9365 binary) Root relaxation: objective 0.000000e+00, 518 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 (1095 simplex iterations) in 0.26 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 Sat Dec 15 02:57:23 2012 Optimize a model with 19850 rows, 5110 columns and 63250 nonzeros Presolve time: 0.08s Presolved: 19850 rows, 5110 columns, 63250 nonzeros Variable types: 0 continuous, 5110 integer (5110 binary) Root relaxation: objective 0.000000e+00, 383 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 (714 simplex iterations) in 0.12 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 Sat Dec 15 02:57:23 2012 Optimize a model with 9590 rows, 2890 columns and 30250 nonzeros Presolve time: 0.03s Presolved: 9590 rows, 2890 columns, 30250 nonzeros Variable types: 0 continuous, 2890 integer (2890 binary) Root relaxation: objective 0.000000e+00, 385 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 (719 simplex iterations) in 0.05 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 Sat Dec 15 02:57:23 2012 Optimize a model with 4460 rows, 1780 columns and 13750 nonzeros Presolve time: 0.01s Presolved: 4460 rows, 1780 columns, 13750 nonzeros Variable types: 0 continuous, 1780 integer (1780 binary) Root relaxation: objective 0.000000e+00, 395 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 0 149 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (3793 simplex iterations) in 0.26 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 Sat Dec 15 02:57:23 2012 Optimize a model with 1895 rows, 1225 columns and 5500 nonzeros Presolve removed 185 rows and 185 columns Presolve time: 0.00s Presolved: 1710 rows, 1040 columns, 5130 nonzeros Variable types: 0 continuous, 1040 integer (1040 binary) Root relaxation: objective 0.000000e+00, 197 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 0 185 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (804 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 02:57:24 2012 Optimize a model with 2750 rows, 1410 columns and 8250 nonzeros Presolve time: 0.01s Presolved: 2750 rows, 1410 columns, 8250 nonzeros Variable types: 0 continuous, 1410 integer (1410 binary) Root relaxation: objective 0.000000e+00, 433 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 0 366 - 0.00000 - - 0s 0 0 0.00000 0 368 - 0.00000 - - 0s 0 0 0.00000 0 461 - 0.00000 - - 0s 0 0 0.00000 0 522 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 1s Cutting planes: Gomory: 1 Zero half: 741 Explored 0 nodes (8149 simplex iterations) in 1.12 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 02:57:25 2012 Optimize a model with 3605 rows, 1595 columns and 11000 nonzeros Presolve time: 0.01s Presolved: 3605 rows, 1595 columns, 11000 nonzeros Variable types: 0 continuous, 1595 integer (1595 binary) Root relaxation: objective 0.000000e+00, 415 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 0 354 - 0.00000 - - 0s 0 0 0.00000 0 352 - 0.00000 - - 0s 0 0 0.00000 0 358 - 0.00000 - - 0s 0 0 0.00000 0 370 - 0.00000 - - 0s 0 0 0.00000 0 338 - 0.00000 - - 1s 0 0 0.00000 0 336 - 0.00000 - - 1s 0 0 0.00000 0 332 - 0.00000 - - 1s 0 0 0.00000 0 334 - 0.00000 - - 2s 0 0 0.00000 0 314 - 0.00000 - - 2s 0 0 0.00000 0 312 - 0.00000 - - 3s 0 0 0.00000 0 310 - 0.00000 - - 3s 0 0 0.00000 0 298 - 0.00000 - - 3s 0 0 0.00000 0 300 - 0.00000 - - 4s 0 0 0.00000 0 300 - 0.00000 - - 4s 0 2 0.00000 0 300 - 0.00000 - - 5s 1004 28 0.00000 18 404 - 0.00000 - 90.0 10s 1009 31 0.00000 10 312 - 0.00000 - 89.6 16s 1012 33 0.00000 12 425 - 0.00000 - 89.3 20s 1149 19 infeasible 25 - 0.00000 - 142 25s 1612 28 0.00000 24 286 - 0.00000 - 153 30s 2006 26 infeasible 21 - 0.00000 - 161 35s 2407 35 infeasible 24 - 0.00000 - 167 40s 2818 18 0.00000 23 314 - 0.00000 - 170 45s Cutting planes: Gomory: 1 Zero half: 2 Explored 2989 nodes (558306 simplex iterations) in 47.56 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 5