Skip to content

Upstream symbolic bytes lemmas for CSE #2476

Open
@palinatolmach

Description

@palinatolmach

Now that we support symbolic parameters in constructors, we need lemmas to simplify expressions such as `

#dasmOpCode ( b"`\xc0`@R`\x01`\x01`\xf8\x1b\x03`\x80R4\x80\x15a\x00\x1bW`\x00\x80\xfd[P`@Qa\x01^8\x03\x80a\x01^\x839\x81\x01`@\x81\x90Ra\x00:\x91a\x00BV[`\xa0Ra\x00[V[`\x00` \x82\x84\x03\x12\x15a\x00TW`\x00\x80\xfd[PQ\x91\x90PV[`\x80Q`\xa0Q`\xe2a\x00|`\x009`\x00`}\x01R`\x00`E\x01R`\xe2`\x00\xf3\xfe`\x80`@R4\x80\x15`\x0fW`\x00\x80\xfd[P`\x046\x10`<W`\x005`\xe0\x1c\x80c\fUi\x9c\x14`AW\x80c\xa5m\xfeJ\x14`yW\x80c\xc5\xd7\x80.\x14`\x9fW[`\x00\x80\xfd[`g\x7f\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x81V[`@Q\x90\x81R` \x01`@Q\x80\x91\x03\x90\xf3[`g\x7f\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x81V[`g`\x01`\x01`\xf0\x1b\x03\x81V\xfe\xa2dipfsX\"\x12 }\xb9\xc9\xcfL\x8cd\x8e\xba`\xa7\xb9'\x9f\xfc\xba?\x0f\xe6\xe0\x9cDeK\x96\x12}\x19D\xd1=\fdsolcC\x00\x08\x17\x003" +Bytes #buf ( 32 , V0__y:Int ) [ 0 ] , SHANGHAI )

The lemmas should look like this:

    //
    // Alternative memory lookup
    //
    rule [bytes-concat-lookup-left]:
      ( B1:Bytes +Bytes B2:Bytes ) [ I:Int ] => B1 [ I ]
      requires 0 <=Int I andBool I <Int lengthBytes(B1)
      [simplification(40), preserves-definedness]

    rule [bytes-concat-lookup-right]:
      ( B1:Bytes +Bytes B2:Bytes ) [ I:Int ] => B2 [ I -Int lengthBytes(B1) ]
      requires lengthBytes(B1) <=Int I
      [simplification(40), preserves-definedness]

    rule [lookup-as-asWord]:
      B:Bytes [ I:Int ] => #asWord ( #range ( B, I, 1 ) )
      requires 0 <=Int I andBool I <=Int lengthBytes(B)
      [simplification(60)]

Once upstreamed, we can remove this lemmas file from Kontrol test suite.

Metadata

Metadata

Assignees

Labels

No labels
No labels

Type

No type

Projects

No projects

Milestone

No milestone

Relationships

None yet

Development

No branches or pull requests

Issue actions