f2a92f3331
The elaborator is prone to duplicate terms, including recursive calls, even if the user only wrote a single one. This duplication is wasteful if we run the tactics on duplicated calls, and confusing in the output of GuessLex. So prune the list of recursive calls, and remove those where another call exists that has the same goal and context that is no more specific.
149 lines
5.3 KiB
Text
149 lines
5.3 KiB
Text
guessLexFailures.lean:11:12-11:46: error: fail to show termination for
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nonTerminating
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with errors
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argument #1 was not used for structural recursion
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failed to eliminate recursive application
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nonTerminating (Nat.succ n) (Nat.succ m)
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argument #2 was not used for structural recursion
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failed to eliminate recursive application
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nonTerminating (Nat.succ n) (Nat.succ m)
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structural recursion cannot be used
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Could not find a decreasing measure.
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The arguments relate at each recursive call as follows:
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(<, ≤, =: relation proved, ? all proofs failed, _: no proof attempted)
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x1 x2
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1) 11:12-46 ? ?
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Please use `termination_by` to specify a decreasing measure.
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guessLexFailures.lean:15:0-18:31: error: Could not find a decreasing measure.
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The arguments relate at each recursive call as follows:
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(<, ≤, =: relation proved, ? all proofs failed, _: no proof attempted)
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x1 x2
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1) 17:12-47 ? ?
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Please use `termination_by` to specify a decreasing measure.
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guessLexFailures.lean:20:4-20:15: error: fail to show termination for
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noArguments
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with errors
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structural recursion cannot be used
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well-founded recursion cannot be used, 'noArguments' does not take any (non-fixed) arguments
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guessLexFailures.lean:22:4-22:23: error: fail to show termination for
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noNonFixedArguments
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with errors
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structural recursion cannot be used
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well-founded recursion cannot be used, 'noNonFixedArguments' does not take any (non-fixed) arguments
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guessLexFailures.lean:27:0-33:31: error: Could not find a decreasing measure.
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The arguments relate at each recursive call as follows:
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(<, ≤, =: relation proved, ? all proofs failed, _: no proof attempted)
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x1 x2 x3
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1) 29:6-25 = = =
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2) 30:6-23 = ? <
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3) 31:6-23 < _ _
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Please use `termination_by` to specify a decreasing measure.
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guessLexFailures.lean:37:0-43:31: error: Could not find a decreasing measure.
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The arguments relate at each recursive call as follows:
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(<, ≤, =: relation proved, ? all proofs failed, _: no proof attempted)
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x1 x2 x3 x4
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1) 39:6-27 = = _ =
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2) 40:6-25 = ? _ <
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3) 41:6-25 < _ _ _
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Please use `termination_by` to specify a decreasing measure.
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guessLexFailures.lean:48:0-54:31: error: Could not find a decreasing measure.
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The arguments relate at each recursive call as follows:
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(<, ≤, =: relation proved, ? all proofs failed, _: no proof attempted)
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n m l
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1) 50:6-25 = = =
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2) 51:6-23 = ? <
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3) 52:6-23 < _ _
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Please use `termination_by` to specify a decreasing measure.
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guessLexFailures.lean:59:6-59:7: error: fail to show termination for
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Mutual.f
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Mutual.g
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Mutual.h
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with errors
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structural recursion does not handle mutually recursive functions
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Could not find a decreasing measure.
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The arguments relate at each recursive call as follows:
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(<, ≤, =: relation proved, ? all proofs failed, _: no proof attempted)
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Call from Mutual.f to Mutual.f at 61:8-33:
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n m l
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= = =
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Call from Mutual.f to Mutual.f at 62:8-31:
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n m l
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= ? <
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Call from Mutual.f to Mutual.g at 63:8-39:
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n m l
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n < _ ?
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m ? _ ?
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H _ _ _
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l ? _ <
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Call from Mutual.g to Mutual.g at 68:8-35:
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n m H l
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? _ _ =
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Call from Mutual.g to Mutual.g at 69:8-33:
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n m H l
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_ _ _ <
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Call from Mutual.g to Mutual.h at 70:8-27:
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n m H l
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x1 _ _ _ ?
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x2 _ _ _ ?
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Call from Mutual.h to Mutual.f at 75:8-33:
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x1 x2
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n _ _
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m _ _
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l _ _
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Call from Mutual.h to Mutual.h at 76:8-27:
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x1 x2
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_ _
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Call from Mutual.h to Mutual.h at 77:8-27:
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x1 x2
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_ _
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Please use `termination_by` to specify a decreasing measure.
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guessLexFailures.lean:89:19-89:32: error: fail to show termination for
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DuplicatedCall.f
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with errors
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argument #1 was not used for structural recursion
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failed to eliminate recursive application
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DuplicatedCall.f (n + 2) (m + 1)
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argument #2 was not used for structural recursion
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failed to eliminate recursive application
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DuplicatedCall.f (n + 2) (m + 1)
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structural recursion cannot be used
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Could not find a decreasing measure.
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The arguments relate at each recursive call as follows:
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(<, ≤, =: relation proved, ? all proofs failed, _: no proof attempted)
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x1 x2
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1) 89:19-32 ? ?
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Please use `termination_by` to specify a decreasing measure.
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guessLexFailures.lean:100:0-103:31: error: Could not find a decreasing measure.
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The arguments relate at each recursive call as follows:
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(<, ≤, =: relation proved, ? all proofs failed, _: no proof attempted)
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n m
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1) 101:83-105 ? ?
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Please use `termination_by` to specify a decreasing measure.
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guessLexFailures.lean:113:14-113:31: error: failed to prove termination, possible solutions:
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- Use `have`-expressions to prove the remaining goals
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- Use `termination_by` to specify a different well-founded relation
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- Use `decreasing_by` to specify your own tactic for discharging this kind of goal
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n✝ m n : Nat
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⊢ n < n✝
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guessLexFailures.lean:119:0-123:31: error: Could not find a decreasing measure.
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The arguments relate at each recursive call as follows:
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(<, ≤, =: relation proved, ? all proofs failed, _: no proof attempted)
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n m
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1) 121:31-54 ? ?
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Please use `termination_by` to specify a decreasing measure.
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guessLexFailures.lean:131:14-131:31: error: failed to prove termination, possible solutions:
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- Use `have`-expressions to prove the remaining goals
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- Use `termination_by` to specify a different well-founded relation
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- Use `decreasing_by` to specify your own tactic for discharging this kind of goal
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m n✝ n : Nat
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⊢ n < Nat.succ n✝
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