MAYBE proof of input_qgs08p768v.trs # AProVE Commit ID: aff8ecad908e01718a4c36e68d2e55d5e0f16e15 fuhs 20220216 unpublished The Runtime Complexity (parallel-innermost) of the given CpxTRS could be proven to be BOUNDS(1, INF). (0) CpxTRS (1) RenamingProof [BOTH BOUNDS(ID, ID), 0 ms] (2) CpxTRS (3) RelTrsToTrsProof [UPPER BOUND(ID), 0 ms] (4) CpxTRS (5) CpxTrsToCdtProof [BOTH BOUNDS(ID, ID), 0 ms] (6) CdtProblem (7) CdtToCpxRelTrsProof [BOTH BOUNDS(ID, ID), 0 ms] (8) CpxRelTRS (9) RenamingProof [BOTH BOUNDS(ID, ID), 0 ms] (10) CpxRelTRS (11) TypeInferenceProof [BOTH BOUNDS(ID, ID), 0 ms] (12) typed CpxTrs (13) OrderProof [LOWER BOUND(ID), 6 ms] (14) typed CpxTrs (15) RelTrsToDecreasingLoopProblemProof [LOWER BOUND(ID), 0 ms] (16) TRS for Loop Detection (17) CpxTrsToCdtProof [UPPER BOUND(ID), 0 ms] (18) CdtProblem (19) CdtLeafRemovalProof [BOTH BOUNDS(ID, ID), 0 ms] (20) CdtProblem (21) CdtUsableRulesProof [BOTH BOUNDS(ID, ID), 0 ms] (22) CdtProblem (23) CdtToCpxRelTrsProof [BOTH BOUNDS(ID, ID), 0 ms] (24) CpxTRS (25) RelTrsToTrsProof [UPPER BOUND(ID), 0 ms] (26) CpxTRS (27) RelTrsToWeightedTrsProof [BOTH BOUNDS(ID, ID), 0 ms] (28) CpxWeightedTrs (29) TypeInferenceProof [BOTH BOUNDS(ID, ID), 0 ms] (30) CpxTypedWeightedTrs (31) CompletionProof [UPPER BOUND(ID), 0 ms] (32) CpxTypedWeightedCompleteTrs (33) NarrowingProof [BOTH BOUNDS(ID, ID), 0 ms] (34) CpxTypedWeightedCompleteTrs (35) CpxTypedWeightedTrsToRntsProof [UPPER BOUND(ID), 0 ms] (36) CpxRNTS (37) SimplificationProof [BOTH BOUNDS(ID, ID), 0 ms] (38) CpxRNTS (39) CpxRntsAnalysisOrderProof [BOTH BOUNDS(ID, ID), 0 ms] (40) CpxRNTS (41) ResultPropagationProof [UPPER BOUND(ID), 0 ms] (42) CpxRNTS (43) IntTrsBoundProof [UPPER BOUND(ID), 231 ms] (44) CpxRNTS (45) IntTrsBoundProof [UPPER BOUND(ID), 53 ms] (46) CpxRNTS (47) CompletionProof [UPPER BOUND(ID), 0 ms] (48) CpxTypedWeightedCompleteTrs (49) CpxTypedWeightedTrsToRntsProof [UPPER BOUND(ID), 0 ms] (50) CpxRNTS (51) RelTrsToWeightedTrsProof [UPPER BOUND(ID), 0 ms] (52) CpxWeightedTrs (53) TypeInferenceProof [BOTH BOUNDS(ID, ID), 0 ms] (54) CpxTypedWeightedTrs (55) CompletionProof [UPPER BOUND(ID), 0 ms] (56) CpxTypedWeightedCompleteTrs (57) NarrowingProof [BOTH BOUNDS(ID, ID), 0 ms] (58) CpxTypedWeightedCompleteTrs (59) CpxTypedWeightedTrsToRntsProof [UPPER BOUND(ID), 0 ms] (60) CpxRNTS (61) SimplificationProof [BOTH BOUNDS(ID, ID), 0 ms] (62) CpxRNTS (63) CpxRntsAnalysisOrderProof [BOTH BOUNDS(ID, ID), 0 ms] (64) CpxRNTS (65) ResultPropagationProof [UPPER BOUND(ID), 0 ms] (66) CpxRNTS (67) IntTrsBoundProof [UPPER BOUND(ID), 160 ms] (68) CpxRNTS (69) IntTrsBoundProof [UPPER BOUND(ID), 68 ms] (70) CpxRNTS (71) CompletionProof [UPPER BOUND(ID), 0 ms] (72) CpxTypedWeightedCompleteTrs (73) CpxTypedWeightedTrsToRntsProof [UPPER BOUND(ID), 0 ms] (74) CpxRNTS ---------------------------------------- (0) Obligation: The Runtime Complexity (parallel-innermost) of the given CpxTRS could be proven to be BOUNDS(1, INF). The TRS R consists of the following rules: f(X) -> f(X) c -> a c -> b S is empty. Rewrite Strategy: PARALLEL_INNERMOST ---------------------------------------- (1) RenamingProof (BOTH BOUNDS(ID, ID)) Renamed function symbols to avoid clashes with predefined symbol. ---------------------------------------- (2) Obligation: The Runtime Complexity (parallel-innermost) of the given CpxTRS could be proven to be BOUNDS(1, INF). The TRS R consists of the following rules: f(X) -> f(X) c -> a c -> b S is empty. Rewrite Strategy: PARALLEL_INNERMOST ---------------------------------------- (3) RelTrsToTrsProof (UPPER BOUND(ID)) transformed relative TRS to TRS ---------------------------------------- (4) Obligation: The Runtime Complexity (parallel-innermost) of the given CpxTRS could be proven to be BOUNDS(1, INF). The TRS R consists of the following rules: f(X) -> f(X) c -> a c -> b S is empty. Rewrite Strategy: PARALLEL_INNERMOST ---------------------------------------- (5) CpxTrsToCdtProof (BOTH BOUNDS(ID, ID)) Converted Cpx (relative) TRS with rewrite strategy PARALLEL_INNERMOST to CDT ---------------------------------------- (6) Obligation: Complexity Dependency Tuples Problem Rules: f(z0) -> f(z0) c -> a c -> b Tuples: F(z0) -> c1(F(z0)) C -> c2 C -> c3 S tuples: F(z0) -> c1(F(z0)) C -> c2 C -> c3 K tuples:none Defined Rule Symbols: f_1, c Defined Pair Symbols: F_1, C Compound Symbols: c1_1, c2, c3 ---------------------------------------- (7) CdtToCpxRelTrsProof (BOTH BOUNDS(ID, ID)) Converted S to standard rules, and D \ S as well as R to relative rules. ---------------------------------------- (8) Obligation: The Runtime Complexity (innermost) of the given CpxRelTRS could be proven to be BOUNDS(1, INF). The TRS R consists of the following rules: F(z0) -> c1(F(z0)) C -> c2 C -> c3 The (relative) TRS S consists of the following rules: f(z0) -> f(z0) c -> a c -> b Rewrite Strategy: INNERMOST ---------------------------------------- (9) RenamingProof (BOTH BOUNDS(ID, ID)) Renamed function symbols to avoid clashes with predefined symbol. ---------------------------------------- (10) Obligation: The Runtime Complexity (innermost) of the given CpxRelTRS could be proven to be BOUNDS(1, INF). The TRS R consists of the following rules: F(z0) -> c1(F(z0)) C -> c2 C -> c3 The (relative) TRS S consists of the following rules: f(z0) -> f(z0) c -> a c -> b Rewrite Strategy: INNERMOST ---------------------------------------- (11) TypeInferenceProof (BOTH BOUNDS(ID, ID)) Inferred types. ---------------------------------------- (12) Obligation: Innermost TRS: Rules: F(z0) -> c1(F(z0)) C -> c2 C -> c3 f(z0) -> f(z0) c -> a c -> b Types: F :: a -> c1 c1 :: c1 -> c1 C :: c2:c3 c2 :: c2:c3 c3 :: c2:c3 f :: b -> f c :: a:b a :: a:b b :: a:b hole_c11_4 :: c1 hole_a2_4 :: a hole_c2:c33_4 :: c2:c3 hole_f4_4 :: f hole_b5_4 :: b hole_a:b6_4 :: a:b gen_c17_4 :: Nat -> c1 ---------------------------------------- (13) OrderProof (LOWER BOUND(ID)) Heuristically decided to analyse the following defined symbols: F, f ---------------------------------------- (14) Obligation: Innermost TRS: Rules: F(z0) -> c1(F(z0)) C -> c2 C -> c3 f(z0) -> f(z0) c -> a c -> b Types: F :: a -> c1 c1 :: c1 -> c1 C :: c2:c3 c2 :: c2:c3 c3 :: c2:c3 f :: b -> f c :: a:b a :: a:b b :: a:b hole_c11_4 :: c1 hole_a2_4 :: a hole_c2:c33_4 :: c2:c3 hole_f4_4 :: f hole_b5_4 :: b hole_a:b6_4 :: a:b gen_c17_4 :: Nat -> c1 Generator Equations: gen_c17_4(0) <=> hole_c11_4 gen_c17_4(+(x, 1)) <=> c1(gen_c17_4(x)) The following defined symbols remain to be analysed: F, f ---------------------------------------- (15) RelTrsToDecreasingLoopProblemProof (LOWER BOUND(ID)) Transformed a relative TRS into a decreasing-loop problem. ---------------------------------------- (16) Obligation: Analyzing the following TRS for decreasing loops: The Runtime Complexity (innermost) of the given CpxRelTRS could be proven to be BOUNDS(1, INF). The TRS R consists of the following rules: F(z0) -> c1(F(z0)) C -> c2 C -> c3 The (relative) TRS S consists of the following rules: f(z0) -> f(z0) c -> a c -> b Rewrite Strategy: INNERMOST ---------------------------------------- (17) CpxTrsToCdtProof (UPPER BOUND(ID)) Converted Cpx (relative) TRS with rewrite strategy PARALLEL_INNERMOST to CDT ---------------------------------------- (18) Obligation: Complexity Dependency Tuples Problem Rules: f(z0) -> f(z0) c -> a c -> b Tuples: F(z0) -> c1(F(z0)) C -> c2 C -> c3 S tuples: F(z0) -> c1(F(z0)) C -> c2 C -> c3 K tuples:none Defined Rule Symbols: f_1, c Defined Pair Symbols: F_1, C Compound Symbols: c1_1, c2, c3 ---------------------------------------- (19) CdtLeafRemovalProof (BOTH BOUNDS(ID, ID)) Removed 2 trailing nodes: C -> c3 C -> c2 ---------------------------------------- (20) Obligation: Complexity Dependency Tuples Problem Rules: f(z0) -> f(z0) c -> a c -> b Tuples: F(z0) -> c1(F(z0)) S tuples: F(z0) -> c1(F(z0)) K tuples:none Defined Rule Symbols: f_1, c Defined Pair Symbols: F_1 Compound Symbols: c1_1 ---------------------------------------- (21) CdtUsableRulesProof (BOTH BOUNDS(ID, ID)) The following rules are not usable and were removed: f(z0) -> f(z0) c -> a c -> b ---------------------------------------- (22) Obligation: Complexity Dependency Tuples Problem Rules:none Tuples: F(z0) -> c1(F(z0)) S tuples: F(z0) -> c1(F(z0)) K tuples:none Defined Rule Symbols:none Defined Pair Symbols: F_1 Compound Symbols: c1_1 ---------------------------------------- (23) CdtToCpxRelTrsProof (BOTH BOUNDS(ID, ID)) Converted S to standard rules, and D \ S as well as R to relative rules. ---------------------------------------- (24) Obligation: The Runtime Complexity (innermost) of the given CpxTRS could be proven to be BOUNDS(1, INF). The TRS R consists of the following rules: F(z0) -> c1(F(z0)) S is empty. Rewrite Strategy: INNERMOST ---------------------------------------- (25) RelTrsToTrsProof (UPPER BOUND(ID)) transformed relative TRS to TRS ---------------------------------------- (26) Obligation: The Runtime Complexity (innermost) of the given CpxTRS could be proven to be BOUNDS(1, INF). The TRS R consists of the following rules: F(z0) -> c1(F(z0)) S is empty. Rewrite Strategy: INNERMOST ---------------------------------------- (27) RelTrsToWeightedTrsProof (BOTH BOUNDS(ID, ID)) Transformed relative TRS to weighted TRS ---------------------------------------- (28) Obligation: The Runtime Complexity (innermost) of the given CpxWeightedTrs could be proven to be BOUNDS(1, INF). The TRS R consists of the following rules: F(z0) -> c1(F(z0)) [1] Rewrite Strategy: INNERMOST ---------------------------------------- (29) TypeInferenceProof (BOTH BOUNDS(ID, ID)) Infered types. ---------------------------------------- (30) Obligation: Runtime Complexity Weighted TRS with Types. The TRS R consists of the following rules: F(z0) -> c1(F(z0)) [1] The TRS has the following type information: F :: a -> c1 c1 :: c1 -> c1 Rewrite Strategy: INNERMOST ---------------------------------------- (31) CompletionProof (UPPER BOUND(ID)) The transformation into a RNTS is sound, since: (a) The obligation is a constructor system where every type has a constant constructor, (b) The following defined symbols do not have to be completely defined, as they can never occur inside other defined symbols: F_1 (c) The following functions are completely defined: none Due to the following rules being added: none And the following fresh constants: const, const1 ---------------------------------------- (32) Obligation: Runtime Complexity Weighted TRS where critical functions are completely defined. The underlying TRS is: Runtime Complexity Weighted TRS with Types. The TRS R consists of the following rules: F(z0) -> c1(F(z0)) [1] The TRS has the following type information: F :: a -> c1 c1 :: c1 -> c1 const :: c1 const1 :: a Rewrite Strategy: INNERMOST ---------------------------------------- (33) NarrowingProof (BOTH BOUNDS(ID, ID)) Narrowed the inner basic terms of all right-hand sides by a single narrowing step. ---------------------------------------- (34) Obligation: Runtime Complexity Weighted TRS where critical functions are completely defined. The underlying TRS is: Runtime Complexity Weighted TRS with Types. The TRS R consists of the following rules: F(z0) -> c1(F(z0)) [1] The TRS has the following type information: F :: a -> c1 c1 :: c1 -> c1 const :: c1 const1 :: a Rewrite Strategy: INNERMOST ---------------------------------------- (35) CpxTypedWeightedTrsToRntsProof (UPPER BOUND(ID)) Transformed the TRS into an over-approximating RNTS by (improved) Size Abstraction. The constant constructors are abstracted as follows: const => 0 const1 => 0 ---------------------------------------- (36) Obligation: Complexity RNTS consisting of the following rules: F(z) -{ 1 }-> 1 + F(z0) :|: z = z0, z0 >= 0 ---------------------------------------- (37) SimplificationProof (BOTH BOUNDS(ID, ID)) Simplified the RNTS by moving equalities from the constraints into the right-hand sides. ---------------------------------------- (38) Obligation: Complexity RNTS consisting of the following rules: F(z) -{ 1 }-> 1 + F(z) :|: z >= 0 ---------------------------------------- (39) CpxRntsAnalysisOrderProof (BOTH BOUNDS(ID, ID)) Found the following analysis order by SCC decomposition: { F } ---------------------------------------- (40) Obligation: Complexity RNTS consisting of the following rules: F(z) -{ 1 }-> 1 + F(z) :|: z >= 0 Function symbols to be analyzed: {F} ---------------------------------------- (41) ResultPropagationProof (UPPER BOUND(ID)) Applied inner abstraction using the recently inferred runtime/size bounds where possible. ---------------------------------------- (42) Obligation: Complexity RNTS consisting of the following rules: F(z) -{ 1 }-> 1 + F(z) :|: z >= 0 Function symbols to be analyzed: {F} ---------------------------------------- (43) IntTrsBoundProof (UPPER BOUND(ID)) Computed SIZE bound using CoFloCo for: F after applying outer abstraction to obtain an ITS, resulting in: O(1) with polynomial bound: 0 ---------------------------------------- (44) Obligation: Complexity RNTS consisting of the following rules: F(z) -{ 1 }-> 1 + F(z) :|: z >= 0 Function symbols to be analyzed: {F} Previous analysis results are: F: runtime: ?, size: O(1) [0] ---------------------------------------- (45) IntTrsBoundProof (UPPER BOUND(ID)) Computed RUNTIME bound using CoFloCo for: F after applying outer abstraction to obtain an ITS, resulting in: INF with polynomial bound: ? ---------------------------------------- (46) Obligation: Complexity RNTS consisting of the following rules: F(z) -{ 1 }-> 1 + F(z) :|: z >= 0 Function symbols to be analyzed: {F} Previous analysis results are: F: runtime: INF, size: O(1) [0] ---------------------------------------- (47) CompletionProof (UPPER BOUND(ID)) The TRS is a completely defined constructor system, as every type has a constant constructor and the following rules were added: none And the following fresh constants: const, const1 ---------------------------------------- (48) Obligation: Runtime Complexity Weighted TRS where all functions are completely defined. The underlying TRS is: Runtime Complexity Weighted TRS with Types. The TRS R consists of the following rules: F(z0) -> c1(F(z0)) [1] The TRS has the following type information: F :: a -> c1 c1 :: c1 -> c1 const :: c1 const1 :: a Rewrite Strategy: INNERMOST ---------------------------------------- (49) CpxTypedWeightedTrsToRntsProof (UPPER BOUND(ID)) Transformed the TRS into an over-approximating RNTS by (improved) Size Abstraction. The constant constructors are abstracted as follows: const => 0 const1 => 0 ---------------------------------------- (50) Obligation: Complexity RNTS consisting of the following rules: F(z) -{ 1 }-> 1 + F(z0) :|: z = z0, z0 >= 0 Only complete derivations are relevant for the runtime complexity. ---------------------------------------- (51) RelTrsToWeightedTrsProof (UPPER BOUND(ID)) Transformed relative TRS to weighted TRS ---------------------------------------- (52) Obligation: The Runtime Complexity (innermost) of the given CpxWeightedTrs could be proven to be BOUNDS(1, INF). The TRS R consists of the following rules: f(X) -> f(X) [1] c -> a [1] c -> b [1] Rewrite Strategy: INNERMOST ---------------------------------------- (53) TypeInferenceProof (BOTH BOUNDS(ID, ID)) Infered types. ---------------------------------------- (54) Obligation: Runtime Complexity Weighted TRS with Types. The TRS R consists of the following rules: f(X) -> f(X) [1] c -> a [1] c -> b [1] The TRS has the following type information: f :: a -> f c :: a:b a :: a:b b :: a:b Rewrite Strategy: INNERMOST ---------------------------------------- (55) CompletionProof (UPPER BOUND(ID)) The transformation into a RNTS is sound, since: (a) The obligation is a constructor system where every type has a constant constructor, (b) The following defined symbols do not have to be completely defined, as they can never occur inside other defined symbols: f_1 c (c) The following functions are completely defined: none Due to the following rules being added: none And the following fresh constants: const, const1 ---------------------------------------- (56) Obligation: Runtime Complexity Weighted TRS where critical functions are completely defined. The underlying TRS is: Runtime Complexity Weighted TRS with Types. The TRS R consists of the following rules: f(X) -> f(X) [1] c -> a [1] c -> b [1] The TRS has the following type information: f :: a -> f c :: a:b a :: a:b b :: a:b const :: f const1 :: a Rewrite Strategy: INNERMOST ---------------------------------------- (57) NarrowingProof (BOTH BOUNDS(ID, ID)) Narrowed the inner basic terms of all right-hand sides by a single narrowing step. ---------------------------------------- (58) Obligation: Runtime Complexity Weighted TRS where critical functions are completely defined. The underlying TRS is: Runtime Complexity Weighted TRS with Types. The TRS R consists of the following rules: f(X) -> f(X) [1] c -> a [1] c -> b [1] The TRS has the following type information: f :: a -> f c :: a:b a :: a:b b :: a:b const :: f const1 :: a Rewrite Strategy: INNERMOST ---------------------------------------- (59) CpxTypedWeightedTrsToRntsProof (UPPER BOUND(ID)) Transformed the TRS into an over-approximating RNTS by (improved) Size Abstraction. The constant constructors are abstracted as follows: a => 0 b => 1 const => 0 const1 => 0 ---------------------------------------- (60) Obligation: Complexity RNTS consisting of the following rules: c -{ 1 }-> 1 :|: c -{ 1 }-> 0 :|: f(z) -{ 1 }-> f(X) :|: X >= 0, z = X ---------------------------------------- (61) SimplificationProof (BOTH BOUNDS(ID, ID)) Simplified the RNTS by moving equalities from the constraints into the right-hand sides. ---------------------------------------- (62) Obligation: Complexity RNTS consisting of the following rules: c -{ 1 }-> 1 :|: c -{ 1 }-> 0 :|: f(z) -{ 1 }-> f(z) :|: z >= 0 ---------------------------------------- (63) CpxRntsAnalysisOrderProof (BOTH BOUNDS(ID, ID)) Found the following analysis order by SCC decomposition: { f } { c } ---------------------------------------- (64) Obligation: Complexity RNTS consisting of the following rules: c -{ 1 }-> 1 :|: c -{ 1 }-> 0 :|: f(z) -{ 1 }-> f(z) :|: z >= 0 Function symbols to be analyzed: {f}, {c} ---------------------------------------- (65) ResultPropagationProof (UPPER BOUND(ID)) Applied inner abstraction using the recently inferred runtime/size bounds where possible. ---------------------------------------- (66) Obligation: Complexity RNTS consisting of the following rules: c -{ 1 }-> 1 :|: c -{ 1 }-> 0 :|: f(z) -{ 1 }-> f(z) :|: z >= 0 Function symbols to be analyzed: {f}, {c} ---------------------------------------- (67) IntTrsBoundProof (UPPER BOUND(ID)) Computed SIZE bound using CoFloCo for: f after applying outer abstraction to obtain an ITS, resulting in: O(1) with polynomial bound: 0 ---------------------------------------- (68) Obligation: Complexity RNTS consisting of the following rules: c -{ 1 }-> 1 :|: c -{ 1 }-> 0 :|: f(z) -{ 1 }-> f(z) :|: z >= 0 Function symbols to be analyzed: {f}, {c} Previous analysis results are: f: runtime: ?, size: O(1) [0] ---------------------------------------- (69) IntTrsBoundProof (UPPER BOUND(ID)) Computed RUNTIME bound using CoFloCo for: f after applying outer abstraction to obtain an ITS, resulting in: INF with polynomial bound: ? ---------------------------------------- (70) Obligation: Complexity RNTS consisting of the following rules: c -{ 1 }-> 1 :|: c -{ 1 }-> 0 :|: f(z) -{ 1 }-> f(z) :|: z >= 0 Function symbols to be analyzed: {f}, {c} Previous analysis results are: f: runtime: INF, size: O(1) [0] ---------------------------------------- (71) CompletionProof (UPPER BOUND(ID)) The TRS is a completely defined constructor system, as every type has a constant constructor and the following rules were added: none And the following fresh constants: const, const1 ---------------------------------------- (72) Obligation: Runtime Complexity Weighted TRS where all functions are completely defined. The underlying TRS is: Runtime Complexity Weighted TRS with Types. The TRS R consists of the following rules: f(X) -> f(X) [1] c -> a [1] c -> b [1] The TRS has the following type information: f :: a -> f c :: a:b a :: a:b b :: a:b const :: f const1 :: a Rewrite Strategy: INNERMOST ---------------------------------------- (73) CpxTypedWeightedTrsToRntsProof (UPPER BOUND(ID)) Transformed the TRS into an over-approximating RNTS by (improved) Size Abstraction. The constant constructors are abstracted as follows: a => 0 b => 1 const => 0 const1 => 0 ---------------------------------------- (74) Obligation: Complexity RNTS consisting of the following rules: c -{ 1 }-> 1 :|: c -{ 1 }-> 0 :|: f(z) -{ 1 }-> f(X) :|: X >= 0, z = X Only complete derivations are relevant for the runtime complexity.