YES
CERTIFIED

Tool output:
YES
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="cpf3HTML.xsl"?>
<certificationProblem xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 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/></overlapPositions><labels><maxLeft>1</maxLeft><right>2</right></labels><intermediateTerms><funapp><name>s</name><var>y1</var></funapp><funapp><name>s</name><funapp><name>+</name><var>y1</var><funapp><name>0</name></funapp></funapp></funapp></intermediateTerms></critPairInfo><critPairInfo><left><funapp><name>s</name><funapp><name>+</name><funapp><name>s</name><var>y1</var></funapp><var>x0_2</var></funapp></funapp></left><peak><funapp><name>+</name><funapp><name>s</name><var>y1</var></funapp><funapp><name>s</name><var>x0_2</var></funapp></funapp></peak><right><funapp><name>s</name><funapp><name>+</name><var>y1</var><funapp><name>s</name><var>x0_2</var></funapp></funapp></funapp></right><overlapPositions><positionInTerm /></overlapPositions><labels><maxLeft>3</maxLeft><right>2</right></labels><intermediateTerms><funapp><name>s</name><funapp><name>s</name><funapp><name>+</name><var>y1</var><var>x0_2</var></funapp></funapp></funapp></intermediateTerms></critPairInfo><critPairInfo><left><funapp><name>0</name></funapp></left><peak><funapp><name>+</name><funapp><name>0</name></funapp><funapp><name>0</name></funapp></funapp></peak><right><funapp><name>0</name></funapp></right><overlapPositions><positionInTerm /></overlapPositions><labels><maxLeft>1</maxLeft><right>1</right></labels><intermediateTerms><funapp><name>0</name></funapp></intermediateTerms></critPairInfo><critPairInfo><left><funapp><name>s</name><funapp><name>+</name><var>x0_1</var><funapp><name>0</name></funapp></funapp></funapp></left><peak><funapp><name>+</name><funapp><name>s</name><var>x0_1</var></funapp><funapp><name>0</name></funapp></funapp></peak><right><funapp><name>s</name><var>x0_1</var></funapp></right><overlapPositions><positionInTerm /></overlapPositions><labels><maxLeft>2</maxLeft><right>1</right></labels><intermediateTerms><funapp><name>s</name><funapp><name>+</name><var>x0_1</var><funapp><name>0</name></funapp></funapp></funapp><funapp><name>s</name><var>x0_1</var></funapp></intermediateTerms></critPairInfo><critPairInfo><left><funapp><name>s</name><var>y2</var></funapp></left><peak><funapp><name>+</name><funapp><name>0</name></funapp><funapp><name>s</name><var>y2</var></funapp></funapp></peak><right><funapp><name>s</name><funapp><name>+</name><funapp><name>0</name></funapp><var>y2</var></funapp></funapp></right><overlapPositions><positionInTerm /></overlapPositions><labels><maxLeft>1</maxLeft><right>3</right></labels><intermediateTerms><funapp><name>s</name><var>y2</var></funapp><funapp><name>s</name><funapp><name>+</name><funapp><name>0</name></funapp><var>y2</var></funapp></funapp></intermediateTerms></critPairInfo><critPairInfo><left><funapp><name>s</name><funapp><name>+</name><var>x0_1</var><funapp><name>s</name><var>y2</var></funapp></funapp></funapp></left><peak><funapp><name>+</name><funapp><name>s</name><var>x0_1</var></funapp><funapp><name>s</name><var>y2</var></funapp></funapp></peak><right><funapp><name>s</name><funapp><name>+</name><funapp><name>s</name><var>x0_1</var></funapp><var>y2</var></funapp></funapp></right><overlapPositions><positionInTerm /></overlapPositions><labels><maxLeft>2</maxLeft><right>3</right></labels><intermediateTerms><funapp><name>s</name><funapp><name>s</name><funapp><name>+</name><var>x0_1</var><var>y2</var></funapp></funapp></funapp><funapp><name>s</name><funapp><name>+</name><funapp><name>s</name><var>x0_1</var></funapp><var>y2</var></funapp></funapp></intermediateTerms></critPairInfo></joinSequences></joinsSR><trs><rules /></trs><crProof><orthogonal /></crProof></compositionalPcpRuleLabeling></crProof></proof><metaInformation><toolInfos><toolInfo>Hakusan</toolInfo><toolInfo>version: 0.11</toolInfo></toolInfos></metaInformation></certificationProblem>