WORST_CASE(INF,?) ### Pre-processing the ITS problem ### Initial linear ITS problem Start location: __init 0: f1_0_main_Load -> f112_0_loop_GE : arg1'=arg1P_1, arg2'=arg2P_1, [ arg2P_1>-1 && arg2>1 && arg1P_1>-1 && arg1>0 ], cost: 1 1: f112_0_loop_GE -> f112_0_loop_GE : arg1'=arg1P_2, arg2'=arg2P_2, [ arg2>arg1 && arg1>-1 && 4+arg1==arg1P_2 && arg2==arg2P_2 ], cost: 1 2: f112_0_loop_GE -> f112_0_loop_GE : arg1'=arg1P_3, arg2'=arg2P_3, [ arg2<=arg1 && arg1>-1 && arg2>-1 && 2+arg1==arg1P_3 && 1+arg2==arg2P_3 ], cost: 1 3: __init -> f1_0_main_Load : arg1'=arg1P_4, arg2'=arg2P_4, [], cost: 1 Checking for constant complexity: The following rule is satisfiable with cost >= 1, yielding constant complexity: 3: __init -> f1_0_main_Load : arg1'=arg1P_4, arg2'=arg2P_4, [], cost: 1 Simplified all rules, resulting in: Start location: __init 0: f1_0_main_Load -> f112_0_loop_GE : arg1'=arg1P_1, arg2'=arg2P_1, [ arg2P_1>-1 && arg2>1 && arg1P_1>-1 && arg1>0 ], cost: 1 1: f112_0_loop_GE -> f112_0_loop_GE : arg1'=4+arg1, [ arg2>arg1 && arg1>-1 ], cost: 1 2: f112_0_loop_GE -> f112_0_loop_GE : arg1'=2+arg1, arg2'=1+arg2, [ arg2<=arg1 && arg1>-1 && arg2>-1 ], cost: 1 3: __init -> f1_0_main_Load : arg1'=arg1P_4, arg2'=arg2P_4, [], cost: 1 ### Simplification by acceleration and chaining ### Accelerating simple loops of location 1. Accelerating the following rules: 1: f112_0_loop_GE -> f112_0_loop_GE : arg1'=4+arg1, [ arg2>arg1 && arg1>-1 ], cost: 1 2: f112_0_loop_GE -> f112_0_loop_GE : arg1'=2+arg1, arg2'=1+arg2, [ arg2<=arg1 && arg1>-1 && arg2>-1 ], cost: 1 Accelerated rule 1 with metering function meter (where 4*meter==-arg1+arg2), yielding the new rule 4. Accelerated rule 2 with NONTERM, yielding the new rule 5. Removing the simple loops: 1 2. Accelerated all simple loops using metering functions (where possible): Start location: __init 0: f1_0_main_Load -> f112_0_loop_GE : arg1'=arg1P_1, arg2'=arg2P_1, [ arg2P_1>-1 && arg2>1 && arg1P_1>-1 && arg1>0 ], cost: 1 4: f112_0_loop_GE -> f112_0_loop_GE : arg1'=arg1+4*meter, [ arg2>arg1 && arg1>-1 && 4*meter==-arg1+arg2 && meter>=1 ], cost: meter 5: f112_0_loop_GE -> [3] : [ arg2<=arg1 && arg1>-1 && arg2>-1 ], cost: NONTERM 3: __init -> f1_0_main_Load : arg1'=arg1P_4, arg2'=arg2P_4, [], cost: 1 Chained accelerated rules (with incoming rules): Start location: __init 0: f1_0_main_Load -> f112_0_loop_GE : arg1'=arg1P_1, arg2'=arg2P_1, [ arg2P_1>-1 && arg2>1 && arg1P_1>-1 && arg1>0 ], cost: 1 6: f1_0_main_Load -> f112_0_loop_GE : arg1'=4*meter+arg1P_1, arg2'=4*meter+arg1P_1, [ 4*meter+arg1P_1>-1 && arg2>1 && arg1P_1>-1 && arg1>0 && 4*meter+arg1P_1>arg1P_1 && meter>=1 ], cost: 1+meter 7: f1_0_main_Load -> [3] : arg1'=arg1P_1, arg2'=arg2P_1, [ arg2P_1>-1 && arg2>1 && arg1P_1>-1 && arg1>0 && arg2P_1<=arg1P_1 ], cost: NONTERM 3: __init -> f1_0_main_Load : arg1'=arg1P_4, arg2'=arg2P_4, [], cost: 1 Removed unreachable locations (and leaf rules with constant cost): Start location: __init 6: f1_0_main_Load -> f112_0_loop_GE : arg1'=4*meter+arg1P_1, arg2'=4*meter+arg1P_1, [ 4*meter+arg1P_1>-1 && arg2>1 && arg1P_1>-1 && arg1>0 && 4*meter+arg1P_1>arg1P_1 && meter>=1 ], cost: 1+meter 7: f1_0_main_Load -> [3] : arg1'=arg1P_1, arg2'=arg2P_1, [ arg2P_1>-1 && arg2>1 && arg1P_1>-1 && arg1>0 && arg2P_1<=arg1P_1 ], cost: NONTERM 3: __init -> f1_0_main_Load : arg1'=arg1P_4, arg2'=arg2P_4, [], cost: 1 Eliminated locations (on tree-shaped paths): Start location: __init 8: __init -> f112_0_loop_GE : arg1'=4*meter+arg1P_1, arg2'=4*meter+arg1P_1, [ 4*meter+arg1P_1>-1 && arg2P_4>1 && arg1P_1>-1 && arg1P_4>0 && 4*meter+arg1P_1>arg1P_1 && meter>=1 ], cost: 2+meter 9: __init -> [3] : arg1'=arg1P_1, arg2'=arg2P_1, [ arg2P_1>-1 && arg2P_4>1 && arg1P_1>-1 && arg1P_4>0 && arg2P_1<=arg1P_1 ], cost: NONTERM ### Computing asymptotic complexity ### Fully simplified ITS problem Start location: __init 8: __init -> f112_0_loop_GE : arg1'=4*meter+arg1P_1, arg2'=4*meter+arg1P_1, [ 4*meter+arg1P_1>-1 && arg2P_4>1 && arg1P_1>-1 && arg1P_4>0 && 4*meter+arg1P_1>arg1P_1 && meter>=1 ], cost: 2+meter 9: __init -> [3] : arg1'=arg1P_1, arg2'=arg2P_1, [ arg2P_1>-1 && arg2P_4>1 && arg1P_1>-1 && arg1P_4>0 && arg2P_1<=arg1P_1 ], cost: NONTERM Computing asymptotic complexity for rule 8 Simplified the guard: 8: __init -> f112_0_loop_GE : arg1'=4*meter+arg1P_1, arg2'=4*meter+arg1P_1, [ arg2P_4>1 && arg1P_1>-1 && arg1P_4>0 && 4*meter+arg1P_1>arg1P_1 ], cost: 2+meter Solved the limit problem by the following transformations: Created initial limit problem: 2+meter (+), 1+arg1P_1 (+/+!), 4*meter (+/+!), -1+arg2P_4 (+/+!), arg1P_4 (+/+!) [not solved] removing all constraints (solved by SMT) resulting limit problem: [solved] applying transformation rule (C) using substitution {meter==n,arg1P_4==n,arg1P_1==n,arg2P_4==n} resulting limit problem: [solved] Solution: meter / n arg1P_4 / n arg1P_1 / n arg2P_4 / n Resulting cost 2+n has complexity: Unbounded Found new complexity Unbounded. Obtained the following overall complexity (w.r.t. the length of the input n): Complexity: Unbounded Cpx degree: Unbounded Solved cost: 2+n Rule cost: 2+meter Rule guard: [ arg2P_4>1 && arg1P_1>-1 && arg1P_4>0 && 4*meter+arg1P_1>arg1P_1 ] WORST_CASE(INF,?)