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Correction for #asWord lemmas #2625

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Sep 19, 2024
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Correction for #asWord lemmas #2625

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06abe55
correction
PetarMax Sep 18, 2024
239af91
Merge branch 'master' into petar/as-word-correction
PetarMax Sep 18, 2024
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5 changes: 3 additions & 2 deletions kevm-pyk/src/kevm_pyk/kproj/evm-semantics/lemmas/evm-int-simplification.k
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Original file line number Diff line number Diff line change
Expand Up @@ -59,6 +59,7 @@ module EVM-INT-SIMPLIFICATION
// Unification: two `#asWord`s
rule [asWord-eq-asWord-ml]:
{ #asWord ( B1 ) #Equals #asWord ( B2 ) } => { true #Equals #asWord ( B1 ) ==Int #asWord ( B2 ) }
requires lengthBytes(B1) <=Int 32 andBool lengthBytes(B2) <=Int 32
[simplification, preserves-definedness]

// Unification: `#asWord` and concrete number
Expand All @@ -70,8 +71,8 @@ module EVM-INT-SIMPLIFICATION
[simplification, concrete(X), comm, preserves-definedness]

// Unification: `#asWord` and concrete number
rule [asWord-eq-num-ml-l]: { #asWord ( B:Bytes ) #Equals X:Int } => { true #Equals #asWord ( B:Bytes ) ==K X:Int } [simplification, concrete(X), preserves-definedness]
rule [asWord-eq-num-ml-r]: { X:Int #Equals #asWord ( B:Bytes ) } => { true #Equals #asWord ( B:Bytes ) ==K X:Int } [simplification, concrete(X), preserves-definedness]
rule [asWord-eq-num-ml-l]: { #asWord ( B:Bytes ) #Equals X:Int } => { true #Equals #asWord ( B:Bytes ) ==K X:Int } requires lengthBytes(B) <=Int 32 [simplification, concrete(X), preserves-definedness]
rule [asWord-eq-num-ml-r]: { X:Int #Equals #asWord ( B:Bytes ) } => { true #Equals #asWord ( B:Bytes ) ==K X:Int } requires lengthBytes(B) <=Int 32 [simplification, concrete(X), preserves-definedness]

// Reduction: we can always remove leading zeros
rule [asWord-trim-leading-zeros]:
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