WORST_CASE(Omega(1),?) ### Pre-processing the ITS problem ### Initial linear ITS problem Start location: l7 0: l0 -> l1 : Result_4^0'=Result_4^post_1, __disjvr_0^0'=__disjvr_0^post_1, tmp_7^0'=tmp_7^post_1, x_5^0'=x_5^post_1, y_6^0'=y_6^post_1, [ x_5^0<=0 && Result_4^post_1==Result_4^post_1 && __disjvr_0^0==__disjvr_0^post_1 && tmp_7^0==tmp_7^post_1 && x_5^0==x_5^post_1 && y_6^0==y_6^post_1 ], cost: 1 1: l0 -> l1 : Result_4^0'=Result_4^post_2, __disjvr_0^0'=__disjvr_0^post_2, tmp_7^0'=tmp_7^post_2, x_5^0'=x_5^post_2, y_6^0'=y_6^post_2, [ 0<=-1+x_5^0 && y_6^0<=0 && Result_4^post_2==Result_4^post_2 && __disjvr_0^0==__disjvr_0^post_2 && tmp_7^0==tmp_7^post_2 && x_5^0==x_5^post_2 && y_6^0==y_6^post_2 ], cost: 1 2: l0 -> l1 : Result_4^0'=Result_4^post_3, __disjvr_0^0'=__disjvr_0^post_3, tmp_7^0'=tmp_7^post_3, x_5^0'=x_5^post_3, y_6^0'=y_6^post_3, [ 0<=-1+x_5^0 && 0<=-1+y_6^0 && y_6^0+x_5^0<=0 && Result_4^post_3==Result_4^post_3 && __disjvr_0^0==__disjvr_0^post_3 && tmp_7^0==tmp_7^post_3 && x_5^0==x_5^post_3 && y_6^0==y_6^post_3 ], cost: 1 3: l0 -> l2 : Result_4^0'=Result_4^post_4, __disjvr_0^0'=__disjvr_0^post_4, tmp_7^0'=tmp_7^post_4, x_5^0'=x_5^post_4, y_6^0'=y_6^post_4, [ 0<=-1+x_5^0 && 0<=-1+y_6^0 && 0<=-1+y_6^0+x_5^0 && tmp_7^post_4==tmp_7^post_4 && tmp_7^post_4<=0 && 0<=tmp_7^post_4 && x_5^post_4==-2+y_6^0 && y_6^post_4==1+x_5^post_4 && Result_4^0==Result_4^post_4 && __disjvr_0^0==__disjvr_0^post_4 ], cost: 1 5: l0 -> l4 : Result_4^0'=Result_4^post_6, __disjvr_0^0'=__disjvr_0^post_6, tmp_7^0'=tmp_7^post_6, x_5^0'=x_5^post_6, y_6^0'=y_6^post_6, [ 0<=-1+x_5^0 && 0<=-1+y_6^0 && 0<=-1+y_6^0+x_5^0 && tmp_7^post_6==tmp_7^post_6 && Result_4^0==Result_4^post_6 && __disjvr_0^0==__disjvr_0^post_6 && x_5^0==x_5^post_6 && y_6^0==y_6^post_6 ], cost: 1 4: l2 -> l0 : Result_4^0'=Result_4^post_5, __disjvr_0^0'=__disjvr_0^post_5, tmp_7^0'=tmp_7^post_5, x_5^0'=x_5^post_5, y_6^0'=y_6^post_5, [ Result_4^0==Result_4^post_5 && __disjvr_0^0==__disjvr_0^post_5 && tmp_7^0==tmp_7^post_5 && x_5^0==x_5^post_5 && y_6^0==y_6^post_5 ], cost: 1 6: l4 -> l5 : Result_4^0'=Result_4^post_7, __disjvr_0^0'=__disjvr_0^post_7, tmp_7^0'=tmp_7^post_7, x_5^0'=x_5^post_7, y_6^0'=y_6^post_7, [ __disjvr_0^post_7==__disjvr_0^0 && Result_4^0==Result_4^post_7 && __disjvr_0^0==__disjvr_0^post_7 && tmp_7^0==tmp_7^post_7 && x_5^0==x_5^post_7 && y_6^0==y_6^post_7 ], cost: 1 7: l5 -> l3 : Result_4^0'=Result_4^post_8, __disjvr_0^0'=__disjvr_0^post_8, tmp_7^0'=tmp_7^post_8, x_5^0'=x_5^post_8, y_6^0'=y_6^post_8, [ x_5^post_8==-1+x_5^0 && y_6^post_8==x_5^post_8 && Result_4^0==Result_4^post_8 && __disjvr_0^0==__disjvr_0^post_8 && tmp_7^0==tmp_7^post_8 ], cost: 1 8: l3 -> l0 : Result_4^0'=Result_4^post_9, __disjvr_0^0'=__disjvr_0^post_9, tmp_7^0'=tmp_7^post_9, x_5^0'=x_5^post_9, y_6^0'=y_6^post_9, [ Result_4^0==Result_4^post_9 && __disjvr_0^0==__disjvr_0^post_9 && tmp_7^0==tmp_7^post_9 && x_5^0==x_5^post_9 && y_6^0==y_6^post_9 ], cost: 1 9: l6 -> l0 : Result_4^0'=Result_4^post_10, __disjvr_0^0'=__disjvr_0^post_10, tmp_7^0'=tmp_7^post_10, x_5^0'=x_5^post_10, y_6^0'=y_6^post_10, [ Result_4^0==Result_4^post_10 && __disjvr_0^0==__disjvr_0^post_10 && tmp_7^0==tmp_7^post_10 && x_5^0==x_5^post_10 && y_6^0==y_6^post_10 ], cost: 1 10: l7 -> l6 : Result_4^0'=Result_4^post_11, __disjvr_0^0'=__disjvr_0^post_11, tmp_7^0'=tmp_7^post_11, x_5^0'=x_5^post_11, y_6^0'=y_6^post_11, [ Result_4^0==Result_4^post_11 && __disjvr_0^0==__disjvr_0^post_11 && tmp_7^0==tmp_7^post_11 && x_5^0==x_5^post_11 && y_6^0==y_6^post_11 ], cost: 1 Checking for constant complexity: The following rule is satisfiable with cost >= 1, yielding constant complexity: 10: l7 -> l6 : Result_4^0'=Result_4^post_11, __disjvr_0^0'=__disjvr_0^post_11, tmp_7^0'=tmp_7^post_11, x_5^0'=x_5^post_11, y_6^0'=y_6^post_11, [ Result_4^0==Result_4^post_11 && __disjvr_0^0==__disjvr_0^post_11 && tmp_7^0==tmp_7^post_11 && x_5^0==x_5^post_11 && y_6^0==y_6^post_11 ], cost: 1 Removed unreachable and leaf rules: Start location: l7 3: l0 -> l2 : Result_4^0'=Result_4^post_4, __disjvr_0^0'=__disjvr_0^post_4, tmp_7^0'=tmp_7^post_4, x_5^0'=x_5^post_4, y_6^0'=y_6^post_4, [ 0<=-1+x_5^0 && 0<=-1+y_6^0 && 0<=-1+y_6^0+x_5^0 && tmp_7^post_4==tmp_7^post_4 && tmp_7^post_4<=0 && 0<=tmp_7^post_4 && x_5^post_4==-2+y_6^0 && y_6^post_4==1+x_5^post_4 && Result_4^0==Result_4^post_4 && __disjvr_0^0==__disjvr_0^post_4 ], cost: 1 5: l0 -> l4 : Result_4^0'=Result_4^post_6, __disjvr_0^0'=__disjvr_0^post_6, tmp_7^0'=tmp_7^post_6, x_5^0'=x_5^post_6, y_6^0'=y_6^post_6, [ 0<=-1+x_5^0 && 0<=-1+y_6^0 && 0<=-1+y_6^0+x_5^0 && tmp_7^post_6==tmp_7^post_6 && Result_4^0==Result_4^post_6 && __disjvr_0^0==__disjvr_0^post_6 && x_5^0==x_5^post_6 && y_6^0==y_6^post_6 ], cost: 1 4: l2 -> l0 : Result_4^0'=Result_4^post_5, __disjvr_0^0'=__disjvr_0^post_5, tmp_7^0'=tmp_7^post_5, x_5^0'=x_5^post_5, y_6^0'=y_6^post_5, [ Result_4^0==Result_4^post_5 && __disjvr_0^0==__disjvr_0^post_5 && tmp_7^0==tmp_7^post_5 && x_5^0==x_5^post_5 && y_6^0==y_6^post_5 ], cost: 1 6: l4 -> l5 : Result_4^0'=Result_4^post_7, __disjvr_0^0'=__disjvr_0^post_7, tmp_7^0'=tmp_7^post_7, x_5^0'=x_5^post_7, y_6^0'=y_6^post_7, [ __disjvr_0^post_7==__disjvr_0^0 && Result_4^0==Result_4^post_7 && __disjvr_0^0==__disjvr_0^post_7 && tmp_7^0==tmp_7^post_7 && x_5^0==x_5^post_7 && y_6^0==y_6^post_7 ], cost: 1 7: l5 -> l3 : Result_4^0'=Result_4^post_8, __disjvr_0^0'=__disjvr_0^post_8, tmp_7^0'=tmp_7^post_8, x_5^0'=x_5^post_8, y_6^0'=y_6^post_8, [ x_5^post_8==-1+x_5^0 && y_6^post_8==x_5^post_8 && Result_4^0==Result_4^post_8 && __disjvr_0^0==__disjvr_0^post_8 && tmp_7^0==tmp_7^post_8 ], cost: 1 8: l3 -> l0 : Result_4^0'=Result_4^post_9, __disjvr_0^0'=__disjvr_0^post_9, tmp_7^0'=tmp_7^post_9, x_5^0'=x_5^post_9, y_6^0'=y_6^post_9, [ Result_4^0==Result_4^post_9 && __disjvr_0^0==__disjvr_0^post_9 && tmp_7^0==tmp_7^post_9 && x_5^0==x_5^post_9 && y_6^0==y_6^post_9 ], cost: 1 9: l6 -> l0 : Result_4^0'=Result_4^post_10, __disjvr_0^0'=__disjvr_0^post_10, tmp_7^0'=tmp_7^post_10, x_5^0'=x_5^post_10, y_6^0'=y_6^post_10, [ Result_4^0==Result_4^post_10 && __disjvr_0^0==__disjvr_0^post_10 && tmp_7^0==tmp_7^post_10 && x_5^0==x_5^post_10 && y_6^0==y_6^post_10 ], cost: 1 10: l7 -> l6 : Result_4^0'=Result_4^post_11, __disjvr_0^0'=__disjvr_0^post_11, tmp_7^0'=tmp_7^post_11, x_5^0'=x_5^post_11, y_6^0'=y_6^post_11, [ Result_4^0==Result_4^post_11 && __disjvr_0^0==__disjvr_0^post_11 && tmp_7^0==tmp_7^post_11 && x_5^0==x_5^post_11 && y_6^0==y_6^post_11 ], cost: 1 Simplified all rules, resulting in: Start location: l7 3: l0 -> l2 : tmp_7^0'=0, x_5^0'=-2+y_6^0, y_6^0'=-1+y_6^0, [ 0<=-1+x_5^0 && 0<=-1+y_6^0 ], cost: 1 5: l0 -> l4 : tmp_7^0'=tmp_7^post_6, [ 0<=-1+x_5^0 && 0<=-1+y_6^0 ], cost: 1 4: l2 -> l0 : [], cost: 1 6: l4 -> l5 : [], cost: 1 7: l5 -> l3 : x_5^0'=-1+x_5^0, y_6^0'=-1+x_5^0, [], cost: 1 8: l3 -> l0 : [], cost: 1 9: l6 -> l0 : [], cost: 1 10: l7 -> l6 : [], cost: 1 ### Simplification by acceleration and chaining ### Eliminated locations (on linear paths): Start location: l7 12: l0 -> l0 : tmp_7^0'=0, x_5^0'=-2+y_6^0, y_6^0'=-1+y_6^0, [ 0<=-1+x_5^0 && 0<=-1+y_6^0 ], cost: 2 15: l0 -> l0 : tmp_7^0'=tmp_7^post_6, x_5^0'=-1+x_5^0, y_6^0'=-1+x_5^0, [ 0<=-1+x_5^0 && 0<=-1+y_6^0 ], cost: 4 11: l7 -> l0 : [], cost: 2 Accelerating simple loops of location 0. Accelerating the following rules: 12: l0 -> l0 : tmp_7^0'=0, x_5^0'=-2+y_6^0, y_6^0'=-1+y_6^0, [ 0<=-1+x_5^0 && 0<=-1+y_6^0 ], cost: 2 15: l0 -> l0 : tmp_7^0'=tmp_7^post_6, x_5^0'=-1+x_5^0, y_6^0'=-1+x_5^0, [ 0<=-1+x_5^0 && 0<=-1+y_6^0 ], cost: 4 [test] deduced pseudo-invariant -1+y_6^0-x_5^0<=0, also trying 1-y_6^0+x_5^0<=-1 Accelerated rule 12 with backward acceleration, yielding the new rule 16. Accelerated rule 12 with backward acceleration, yielding the new rule 17. [test] deduced pseudo-invariant -1-y_6^0+x_5^0<=0, also trying 1+y_6^0-x_5^0<=-1 Accelerated rule 15 with backward acceleration, yielding the new rule 18. Accelerated rule 15 with backward acceleration, yielding the new rule 19. [accelerate] Nesting with 4 inner and 2 outer candidates Also removing duplicate rules: 18. Accelerated all simple loops using metering functions (where possible): Start location: l7 12: l0 -> l0 : tmp_7^0'=0, x_5^0'=-2+y_6^0, y_6^0'=-1+y_6^0, [ 0<=-1+x_5^0 && 0<=-1+y_6^0 ], cost: 2 15: l0 -> l0 : tmp_7^0'=tmp_7^post_6, x_5^0'=-1+x_5^0, y_6^0'=-1+x_5^0, [ 0<=-1+x_5^0 && 0<=-1+y_6^0 ], cost: 4 16: l0 -> l0 : tmp_7^0'=0, x_5^0'=0, y_6^0'=1, [ -1+y_6^0-x_5^0<=0 && -1+y_6^0>=1 ], cost: -2+2*y_6^0 17: l0 -> l0 : tmp_7^0'=0, x_5^0'=-1, y_6^0'=0, [ 0<=-1 ], cost: 2*y_6^0 19: l0 -> l0 : tmp_7^0'=tmp_7^post_6, x_5^0'=0, y_6^0'=0, [ -1-y_6^0+x_5^0<=0 && x_5^0>=1 ], cost: 4*x_5^0 11: l7 -> l0 : [], cost: 2 Chained accelerated rules (with incoming rules): Start location: l7 11: l7 -> l0 : [], cost: 2 20: l7 -> l0 : tmp_7^0'=0, x_5^0'=-2+y_6^0, y_6^0'=-1+y_6^0, [ 0<=-1+x_5^0 && 0<=-1+y_6^0 ], cost: 4 21: l7 -> l0 : tmp_7^0'=tmp_7^post_6, x_5^0'=-1+x_5^0, y_6^0'=-1+x_5^0, [ 0<=-1+x_5^0 && 0<=-1+y_6^0 ], cost: 6 22: l7 -> l0 : tmp_7^0'=0, x_5^0'=0, y_6^0'=1, [ -1+y_6^0-x_5^0<=0 && -1+y_6^0>=1 ], cost: 2*y_6^0 23: l7 -> l0 : tmp_7^0'=tmp_7^post_6, x_5^0'=0, y_6^0'=0, [ -1-y_6^0+x_5^0<=0 && x_5^0>=1 ], cost: 2+4*x_5^0 Removed unreachable locations (and leaf rules with constant cost): Start location: l7 22: l7 -> l0 : tmp_7^0'=0, x_5^0'=0, y_6^0'=1, [ -1+y_6^0-x_5^0<=0 && -1+y_6^0>=1 ], cost: 2*y_6^0 23: l7 -> l0 : tmp_7^0'=tmp_7^post_6, x_5^0'=0, y_6^0'=0, [ -1-y_6^0+x_5^0<=0 && x_5^0>=1 ], cost: 2+4*x_5^0 ### Computing asymptotic complexity ### Fully simplified ITS problem Start location: l7 22: l7 -> l0 : tmp_7^0'=0, x_5^0'=0, y_6^0'=1, [ -1+y_6^0-x_5^0<=0 && -1+y_6^0>=1 ], cost: 2*y_6^0 23: l7 -> l0 : tmp_7^0'=tmp_7^post_6, x_5^0'=0, y_6^0'=0, [ -1-y_6^0+x_5^0<=0 && x_5^0>=1 ], cost: 2+4*x_5^0 Computing asymptotic complexity for rule 22 Resulting cost 0 has complexity: Unknown Computing asymptotic complexity for rule 23 Resulting cost 0 has complexity: Unknown Obtained the following overall complexity (w.r.t. the length of the input n): Complexity: Constant Cpx degree: 0 Solved cost: 1 Rule cost: 1 Rule guard: [ Result_4^0==Result_4^post_11 && __disjvr_0^0==__disjvr_0^post_11 && tmp_7^0==tmp_7^post_11 && x_5^0==x_5^post_11 && y_6^0==y_6^post_11 ] WORST_CASE(Omega(1),?)