./chc-comp-wrapper.sh ../../../chc-comp24-benchmarks/LIA-Arrays/chc-comp24-LIA-Arrays-088.smt2 .


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This is Ultimate 0.3.0-dev-42d8767-m
[2025-04-28 21:21:17,529 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2025-04-28 21:21:17,620 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12cb0a8f-4ffa-484a-b78b-4751bc7a0adb/chc-comp25-scripts/participants/UltimateUnihorn/./chccomp-Unihorn_Default.epf
[2025-04-28 21:21:17,625 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2025-04-28 21:21:17,626 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2025-04-28 21:21:17,654 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2025-04-28 21:21:17,656 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2025-04-28 21:21:17,657 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2025-04-28 21:21:17,658 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2025-04-28 21:21:17,658 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2025-04-28 21:21:17,660 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2025-04-28 21:21:17,660 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2025-04-28 21:21:17,660 INFO  L153        SettingsManager]:  * Use SBE=true
[2025-04-28 21:21:17,660 INFO  L151        SettingsManager]: Preferences of ChcToBoogie differ from their defaults:
[2025-04-28 21:21:17,660 INFO  L153        SettingsManager]:  * Use one large procedure with gotos to replace tail recursive calls=false
[2025-04-28 21:21:17,661 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2025-04-28 21:21:17,661 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2025-04-28 21:21:17,661 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2025-04-28 21:21:17,662 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:17,662 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2025-04-28 21:21:17,662 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2025-04-28 21:21:17,662 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2025-04-28 21:21:17,662 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2025-04-28 21:21:17,662 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2025-04-28 21:21:17,662 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2025-04-28 21:21:17,664 INFO  L151        SettingsManager]: Preferences of SmtParser differ from their defaults:
[2025-04-28 21:21:17,664 INFO  L153        SettingsManager]:  * SmtParser Mode=UltimateTreeAutomizer
[2025-04-28 21:21:18,010 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2025-04-28 21:21:18,024 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2025-04-28 21:21:18,027 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2025-04-28 21:21:18,029 INFO  L270        PluginConnector]: Initializing SmtParser...
[2025-04-28 21:21:18,029 INFO  L274        PluginConnector]: SmtParser initialized
[2025-04-28 21:21:18,032 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12cb0a8f-4ffa-484a-b78b-4751bc7a0adb/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Arrays/chc-comp24-LIA-Arrays-088.smt2
[2025-04-28 21:21:18,034 INFO  L314              SmtParser]: Parsing .smt2 file as a set of Horn Clauses
[2025-04-28 21:21:18,039 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
unknown
[2025-04-28 21:21:18,525 INFO  L339              SmtParser]: Successfully executed SMT file /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12cb0a8f-4ffa-484a-b78b-4751bc7a0adb/chc-comp25-scripts/participants/UltimateUnihorn/../../../chc-comp24-benchmarks/LIA-Arrays/chc-comp24-LIA-Arrays-088.smt2
[2025-04-28 21:21:18,528 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2025-04-28 21:21:18,530 INFO  L133        ToolchainWalker]: Walking toolchain with 4 elements.
[2025-04-28 21:21:18,531 INFO  L112        PluginConnector]: ------------------------ChcToBoogie----------------------------
[2025-04-28 21:21:18,531 INFO  L270        PluginConnector]: Initializing ChcToBoogie...
[2025-04-28 21:21:18,531 INFO  L274        PluginConnector]: ChcToBoogie initialized
[2025-04-28 21:21:18,534 INFO  L184        PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:18" (1/1) ...
[2025-04-28 21:21:18,585 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:18 Unit
[2025-04-28 21:21:18,586 INFO  L131        PluginConnector]: ------------------------ END ChcToBoogie----------------------------
[2025-04-28 21:21:18,587 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2025-04-28 21:21:18,587 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2025-04-28 21:21:18,587 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2025-04-28 21:21:18,607 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:18" (1/1) ...
[2025-04-28 21:21:18,607 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:18" (1/1) ...
[2025-04-28 21:21:18,659 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:18" (1/1) ...
[2025-04-28 21:21:18,659 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:18" (1/1) ...
[2025-04-28 21:21:18,674 INFO  L184        PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:18" (1/1) ...
[2025-04-28 21:21:18,676 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:18" (1/1) ...
[2025-04-28 21:21:18,680 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:18" (1/1) ...
[2025-04-28 21:21:18,684 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:18" (1/1) ...
[2025-04-28 21:21:18,685 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:18" (1/1) ...
[2025-04-28 21:21:18,706 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2025-04-28 21:21:18,707 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2025-04-28 21:21:18,707 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2025-04-28 21:21:18,707 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2025-04-28 21:21:18,708 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:18" (1/1) ...
[2025-04-28 21:21:18,711 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2025-04-28 21:21:18,727 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:18,748 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /usr/bin/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2025-04-28 21:21:18,753 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2025-04-28 21:21:18,768 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure False given in one single declaration
[2025-04-28 21:21:18,768 INFO  L130     BoogieDeclarations]: Found specification of procedure False
[2025-04-28 21:21:18,769 INFO  L138     BoogieDeclarations]: Found implementation of procedure False
[2025-04-28 21:21:18,769 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure realizable given in one single declaration
[2025-04-28 21:21:18,769 INFO  L130     BoogieDeclarations]: Found specification of procedure realizable
[2025-04-28 21:21:18,769 INFO  L138     BoogieDeclarations]: Found implementation of procedure realizable
[2025-04-28 21:21:18,770 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcStart__syn given in one single declaration
[2025-04-28 21:21:18,770 INFO  L130     BoogieDeclarations]: Found specification of procedure funcStart__syn
[2025-04-28 21:21:18,770 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcStart__syn
[2025-04-28 21:21:18,770 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcS__syn given in one single declaration
[2025-04-28 21:21:18,770 INFO  L130     BoogieDeclarations]: Found specification of procedure funcS__syn
[2025-04-28 21:21:18,770 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcS__syn
[2025-04-28 21:21:18,771 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcS1__syn given in one single declaration
[2025-04-28 21:21:18,772 INFO  L130     BoogieDeclarations]: Found specification of procedure funcS1__syn
[2025-04-28 21:21:18,773 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcS1__syn
[2025-04-28 21:21:18,773 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcA__syn given in one single declaration
[2025-04-28 21:21:18,773 INFO  L130     BoogieDeclarations]: Found specification of procedure funcA__syn
[2025-04-28 21:21:18,773 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcA__syn
[2025-04-28 21:21:18,773 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcE__syn given in one single declaration
[2025-04-28 21:21:18,773 INFO  L130     BoogieDeclarations]: Found specification of procedure funcE__syn
[2025-04-28 21:21:18,773 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcE__syn
[2025-04-28 21:21:18,773 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcS2__syn given in one single declaration
[2025-04-28 21:21:18,773 INFO  L130     BoogieDeclarations]: Found specification of procedure funcS2__syn
[2025-04-28 21:21:18,774 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcS2__syn
[2025-04-28 21:21:18,774 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcP__syn given in one single declaration
[2025-04-28 21:21:18,774 INFO  L130     BoogieDeclarations]: Found specification of procedure funcP__syn
[2025-04-28 21:21:18,774 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcP__syn
[2025-04-28 21:21:18,774 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcStart__sem given in one single declaration
[2025-04-28 21:21:18,774 INFO  L130     BoogieDeclarations]: Found specification of procedure funcStart__sem
[2025-04-28 21:21:18,774 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcStart__sem
[2025-04-28 21:21:18,774 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcB__sem given in one single declaration
[2025-04-28 21:21:18,774 INFO  L130     BoogieDeclarations]: Found specification of procedure funcB__sem
[2025-04-28 21:21:18,774 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcB__sem
[2025-04-28 21:21:18,774 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcS__sem given in one single declaration
[2025-04-28 21:21:18,775 INFO  L130     BoogieDeclarations]: Found specification of procedure funcS__sem
[2025-04-28 21:21:18,775 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcS__sem
[2025-04-28 21:21:18,775 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcS1__sem given in one single declaration
[2025-04-28 21:21:18,775 INFO  L130     BoogieDeclarations]: Found specification of procedure funcS1__sem
[2025-04-28 21:21:18,775 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcS1__sem
[2025-04-28 21:21:18,775 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcA__sem given in one single declaration
[2025-04-28 21:21:18,775 INFO  L130     BoogieDeclarations]: Found specification of procedure funcA__sem
[2025-04-28 21:21:18,775 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcA__sem
[2025-04-28 21:21:18,775 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcE__sem given in one single declaration
[2025-04-28 21:21:18,775 INFO  L130     BoogieDeclarations]: Found specification of procedure funcE__sem
[2025-04-28 21:21:18,775 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcE__sem
[2025-04-28 21:21:18,776 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcS2__sem given in one single declaration
[2025-04-28 21:21:18,776 INFO  L130     BoogieDeclarations]: Found specification of procedure funcS2__sem
[2025-04-28 21:21:18,776 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcS2__sem
[2025-04-28 21:21:18,776 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcP__sem given in one single declaration
[2025-04-28 21:21:18,776 INFO  L130     BoogieDeclarations]: Found specification of procedure funcP__sem
[2025-04-28 21:21:18,776 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcP__sem
[2025-04-28 21:21:18,776 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure funcB__syn given in one single declaration
[2025-04-28 21:21:18,776 INFO  L130     BoogieDeclarations]: Found specification of procedure funcB__syn
[2025-04-28 21:21:18,776 INFO  L138     BoogieDeclarations]: Found implementation of procedure funcB__syn
[2025-04-28 21:21:18,776 INFO  L124     BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration
[2025-04-28 21:21:18,776 INFO  L130     BoogieDeclarations]: Found specification of procedure Ultimate.START
[2025-04-28 21:21:18,777 INFO  L138     BoogieDeclarations]: Found implementation of procedure Ultimate.START
[2025-04-28 21:21:19,064 INFO  L234             CfgBuilder]: Building ICFG
[2025-04-28 21:21:19,070 INFO  L260             CfgBuilder]: Building CFG for each procedure with an implementation
[2025-04-28 21:21:19,630 INFO  L?                        ?]: Removed 99 outVars from TransFormulas that were not future-live.
[2025-04-28 21:21:19,630 INFO  L283             CfgBuilder]: Performing block encoding
[2025-04-28 21:21:19,651 INFO  L304             CfgBuilder]: Using library mode
[2025-04-28 21:21:19,653 INFO  L312             CfgBuilder]: Removed 1 assume(true) statements.
[2025-04-28 21:21:19,656 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:19 BoogieIcfgContainer
[2025-04-28 21:21:19,656 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2025-04-28 21:21:19,658 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2025-04-28 21:21:19,658 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2025-04-28 21:21:19,664 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2025-04-28 21:21:19,665 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 28.04 09:21:18" (1/3) ...
[2025-04-28 21:21:19,665 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1880a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 28.04 09:21:19, skipping insertion in model container
[2025-04-28 21:21:19,665 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 28.04 09:21:18" (2/3) ...
[2025-04-28 21:21:19,666 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1880a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 09:21:19, skipping insertion in model container
[2025-04-28 21:21:19,666 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 09:21:19" (3/3) ...
[2025-04-28 21:21:19,667 INFO  L128   eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver
[2025-04-28 21:21:19,683 INFO  L217   ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2025-04-28 21:21:19,686 INFO  L151   ceAbstractionStarter]: Applying trace abstraction to ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver that has 19 procedures, 88 locations, 142 edges, 19 initial locations, 0 loop locations, and 1 error locations.
[2025-04-28 21:21:19,741 INFO  L339      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2025-04-28 21:21:19,753 INFO  L340      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@255e7d9f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2025-04-28 21:21:19,754 INFO  L341      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2025-04-28 21:21:19,759 INFO  L278                IsEmpty]: Start isEmpty. Operand  has 88 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 45 states have internal predecessors, (49), 31 states have call successors, (31), 18 states have call predecessors, (31), 18 states have return successors, (31), 25 states have call predecessors, (31), 31 states have call successors, (31)
[2025-04-28 21:21:19,774 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 49
[2025-04-28 21:21:19,776 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:19,777 INFO  L218           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:19,778 INFO  L403      AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:19,785 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:19,785 INFO  L85        PathProgramCache]: Analyzing trace with hash 938069416, now seen corresponding path program 1 times
[2025-04-28 21:21:19,792 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:19,793 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314652762]
[2025-04-28 21:21:19,793 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:19,794 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:19,881 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes.
[2025-04-28 21:21:20,047 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements.
[2025-04-28 21:21:20,048 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:20,048 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:21,360 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2025-04-28 21:21:21,360 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:21,361 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314652762]
[2025-04-28 21:21:21,363 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314652762] provided 1 perfect and 0 imperfect interpolant sequences
[2025-04-28 21:21:21,363 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2025-04-28 21:21:21,367 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2025-04-28 21:21:21,369 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805961740]
[2025-04-28 21:21:21,370 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2025-04-28 21:21:21,375 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2025-04-28 21:21:21,375 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:21,442 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2025-04-28 21:21:21,443 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2025-04-28 21:21:21,445 INFO  L87              Difference]: Start difference. First operand  has 88 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 45 states have internal predecessors, (49), 31 states have call successors, (31), 18 states have call predecessors, (31), 18 states have return successors, (31), 25 states have call predecessors, (31), 31 states have call successors, (31) Second operand  has 8 states, 5 states have (on average 4.4) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (12), 1 states have call predecessors, (12), 5 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12)
[2025-04-28 21:21:21,739 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:21,742 INFO  L93              Difference]: Finished difference Result 91 states and 115 transitions.
[2025-04-28 21:21:21,744 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2025-04-28 21:21:21,745 INFO  L79                 Accepts]: Start accepts. Automaton has  has 8 states, 5 states have (on average 4.4) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (12), 1 states have call predecessors, (12), 5 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 48
[2025-04-28 21:21:21,746 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:21,759 INFO  L225             Difference]: With dead ends: 91
[2025-04-28 21:21:21,759 INFO  L226             Difference]: Without dead ends: 88
[2025-04-28 21:21:21,762 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90
[2025-04-28 21:21:21,766 INFO  L437           NwaCegarLoop]: 105 mSDtfsCounter, 4 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:21,767 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 614 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2025-04-28 21:21:21,783 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 88 states.
[2025-04-28 21:21:21,819 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88.
[2025-04-28 21:21:21,824 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 88 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 44 states have internal predecessors, (48), 31 states have call successors, (31), 18 states have call predecessors, (31), 19 states have return successors, (32), 25 states have call predecessors, (32), 31 states have call successors, (32)
[2025-04-28 21:21:21,831 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 111 transitions.
[2025-04-28 21:21:21,834 INFO  L79                 Accepts]: Start accepts. Automaton has 88 states and 111 transitions. Word has length 48
[2025-04-28 21:21:21,835 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:21,836 INFO  L485      AbstractCegarLoop]: Abstraction has 88 states and 111 transitions.
[2025-04-28 21:21:21,836 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 5 states have (on average 4.4) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (12), 1 states have call predecessors, (12), 5 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12)
[2025-04-28 21:21:21,836 INFO  L278                IsEmpty]: Start isEmpty. Operand 88 states and 111 transitions.
[2025-04-28 21:21:21,842 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 89
[2025-04-28 21:21:21,844 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:21,844 INFO  L218           NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:21,845 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2025-04-28 21:21:21,845 INFO  L403      AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:21,846 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:21,847 INFO  L85        PathProgramCache]: Analyzing trace with hash 430525651, now seen corresponding path program 1 times
[2025-04-28 21:21:21,847 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:21,847 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333102766]
[2025-04-28 21:21:21,847 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:21,847 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:21,920 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 88 statements into 1 equivalence classes.
[2025-04-28 21:21:21,973 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 88 of 88 statements.
[2025-04-28 21:21:21,973 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:21,974 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:24,265 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2025-04-28 21:21:24,266 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:24,266 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333102766]
[2025-04-28 21:21:24,266 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333102766] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:24,266 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174858878]
[2025-04-28 21:21:24,266 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:24,266 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:24,270 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:24,276 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:24,278 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2025-04-28 21:21:24,632 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 88 statements into 1 equivalence classes.
[2025-04-28 21:21:24,945 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 88 of 88 statements.
[2025-04-28 21:21:24,945 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:24,945 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:24,954 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 33 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:24,972 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:25,115 INFO  L189   IndexEqualityManager]: detected not equals via solver
[2025-04-28 21:21:25,133 INFO  L354             Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23
[2025-04-28 21:21:26,303 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2025-04-28 21:21:26,303 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:28,834 INFO  L354             Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5
[2025-04-28 21:21:28,918 INFO  L354             Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5
[2025-04-28 21:21:29,174 INFO  L354             Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5
[2025-04-28 21:21:29,542 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked.
[2025-04-28 21:21:29,542 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174858878] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:29,542 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:29,542 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34
[2025-04-28 21:21:29,545 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451794990]
[2025-04-28 21:21:29,545 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:29,547 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 34 states
[2025-04-28 21:21:29,548 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:29,549 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants.
[2025-04-28 21:21:29,550 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122
[2025-04-28 21:21:29,551 INFO  L87              Difference]: Start difference. First operand 88 states and 111 transitions. Second operand  has 34 states, 16 states have (on average 3.4375) internal successors, (55), 25 states have internal predecessors, (55), 25 states have call successors, (38), 1 states have call predecessors, (38), 16 states have return successors, (40), 21 states have call predecessors, (40), 25 states have call successors, (40)
[2025-04-28 21:21:30,771 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:30,771 INFO  L93              Difference]: Finished difference Result 101 states and 130 transitions.
[2025-04-28 21:21:30,772 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2025-04-28 21:21:30,772 INFO  L79                 Accepts]: Start accepts. Automaton has  has 34 states, 16 states have (on average 3.4375) internal successors, (55), 25 states have internal predecessors, (55), 25 states have call successors, (38), 1 states have call predecessors, (38), 16 states have return successors, (40), 21 states have call predecessors, (40), 25 states have call successors, (40) Word has length 88
[2025-04-28 21:21:30,773 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:30,775 INFO  L225             Difference]: With dead ends: 101
[2025-04-28 21:21:30,775 INFO  L226             Difference]: Without dead ends: 99
[2025-04-28 21:21:30,777 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=177, Invalid=1985, Unknown=0, NotChecked=0, Total=2162
[2025-04-28 21:21:30,779 INFO  L437           NwaCegarLoop]: 102 mSDtfsCounter, 28 mSDsluCounter, 2341 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 2443 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:30,779 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 2443 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time]
[2025-04-28 21:21:30,781 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 99 states.
[2025-04-28 21:21:30,793 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97.
[2025-04-28 21:21:30,793 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 97 states, 40 states have (on average 1.275) internal successors, (51), 47 states have internal predecessors, (51), 34 states have call successors, (34), 18 states have call predecessors, (34), 22 states have return successors, (41), 31 states have call predecessors, (41), 34 states have call successors, (41)
[2025-04-28 21:21:30,796 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions.
[2025-04-28 21:21:30,796 INFO  L79                 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 88
[2025-04-28 21:21:30,797 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:30,797 INFO  L485      AbstractCegarLoop]: Abstraction has 97 states and 126 transitions.
[2025-04-28 21:21:30,797 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 34 states, 16 states have (on average 3.4375) internal successors, (55), 25 states have internal predecessors, (55), 25 states have call successors, (38), 1 states have call predecessors, (38), 16 states have return successors, (40), 21 states have call predecessors, (40), 25 states have call successors, (40)
[2025-04-28 21:21:30,798 INFO  L278                IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions.
[2025-04-28 21:21:30,801 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 121
[2025-04-28 21:21:30,801 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:30,802 INFO  L218           NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:30,808 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2025-04-28 21:21:31,006 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:31,006 INFO  L403      AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:31,007 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:31,007 INFO  L85        PathProgramCache]: Analyzing trace with hash 1642273529, now seen corresponding path program 1 times
[2025-04-28 21:21:31,007 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:31,007 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53554213]
[2025-04-28 21:21:31,007 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:31,007 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:31,067 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes.
[2025-04-28 21:21:31,168 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements.
[2025-04-28 21:21:31,168 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:31,168 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:36,045 INFO  L134       CoverageAnalysis]: Checked inductivity of 57 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked.
[2025-04-28 21:21:36,045 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2025-04-28 21:21:36,045 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53554213]
[2025-04-28 21:21:36,045 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53554213] provided 0 perfect and 1 imperfect interpolant sequences
[2025-04-28 21:21:36,045 INFO  L324   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558372865]
[2025-04-28 21:21:36,046 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:36,046 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:36,048 INFO  L189       MonitoredProcess]: No working directory specified, using /usr/bin/z3
[2025-04-28 21:21:36,050 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2025-04-28 21:21:36,053 INFO  L327       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2025-04-28 21:21:36,363 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes.
[2025-04-28 21:21:36,667 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements.
[2025-04-28 21:21:36,667 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:36,668 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2025-04-28 21:21:36,678 INFO  L256         TraceCheckSpWp]: Trace formula consists of 1921 conjuncts, 40 conjuncts are in the unsatisfiable core
[2025-04-28 21:21:36,686 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2025-04-28 21:21:36,701 INFO  L354             Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 24
[2025-04-28 21:21:37,656 INFO  L134       CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked.
[2025-04-28 21:21:37,657 INFO  L312         TraceCheckSpWp]: Computing backward predicates...
[2025-04-28 21:21:40,277 INFO  L354             Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5
[2025-04-28 21:21:40,360 INFO  L354             Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5
[2025-04-28 21:21:40,886 INFO  L354             Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5
[2025-04-28 21:21:41,021 INFO  L354             Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5
[2025-04-28 21:21:41,109 INFO  L354             Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5
[2025-04-28 21:21:41,339 INFO  L354             Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5
[2025-04-28 21:21:41,488 INFO  L134       CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked.
[2025-04-28 21:21:41,488 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558372865] provided 0 perfect and 2 imperfect interpolant sequences
[2025-04-28 21:21:41,488 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2025-04-28 21:21:41,488 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19, 19] total 51
[2025-04-28 21:21:41,488 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171031467]
[2025-04-28 21:21:41,488 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2025-04-28 21:21:41,489 INFO  L562      AbstractCegarLoop]: INTERPOLANT automaton has 51 states
[2025-04-28 21:21:41,489 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2025-04-28 21:21:41,491 INFO  L144   InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants.
[2025-04-28 21:21:41,492 INFO  L146   InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2423, Unknown=0, NotChecked=0, Total=2550
[2025-04-28 21:21:41,492 INFO  L87              Difference]: Start difference. First operand 97 states and 126 transitions. Second operand  has 51 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 37 states have internal predecessors, (73), 37 states have call successors, (51), 1 states have call predecessors, (51), 24 states have return successors, (56), 35 states have call predecessors, (56), 37 states have call successors, (56)
[2025-04-28 21:21:44,200 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2025-04-28 21:21:44,200 INFO  L93              Difference]: Finished difference Result 131 states and 180 transitions.
[2025-04-28 21:21:44,204 INFO  L140   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. 
[2025-04-28 21:21:44,205 INFO  L79                 Accepts]: Start accepts. Automaton has  has 51 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 37 states have internal predecessors, (73), 37 states have call successors, (51), 1 states have call predecessors, (51), 24 states have return successors, (56), 35 states have call predecessors, (56), 37 states have call successors, (56) Word has length 120
[2025-04-28 21:21:44,205 INFO  L85                 Accepts]: Finished accepts. some prefix is accepted.
[2025-04-28 21:21:44,212 INFO  L225             Difference]: With dead ends: 131
[2025-04-28 21:21:44,212 INFO  L226             Difference]: Without dead ends: 125
[2025-04-28 21:21:44,215 INFO  L436           NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=383, Invalid=5469, Unknown=0, NotChecked=0, Total=5852
[2025-04-28 21:21:44,215 INFO  L437           NwaCegarLoop]: 99 mSDtfsCounter, 51 mSDsluCounter, 3679 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 3778 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2025-04-28 21:21:44,219 INFO  L438           NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 3778 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2025-04-28 21:21:44,220 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 125 states.
[2025-04-28 21:21:44,266 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 102.
[2025-04-28 21:21:44,270 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 102 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 49 states have internal predecessors, (53), 35 states have call successors, (35), 18 states have call predecessors, (35), 24 states have return successors, (48), 34 states have call predecessors, (48), 35 states have call successors, (48)
[2025-04-28 21:21:44,272 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions.
[2025-04-28 21:21:44,276 INFO  L79                 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 120
[2025-04-28 21:21:44,276 INFO  L85                 Accepts]: Finished accepts. word is rejected.
[2025-04-28 21:21:44,280 INFO  L485      AbstractCegarLoop]: Abstraction has 102 states and 136 transitions.
[2025-04-28 21:21:44,280 INFO  L486      AbstractCegarLoop]: INTERPOLANT automaton has  has 51 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 37 states have internal predecessors, (73), 37 states have call successors, (51), 1 states have call predecessors, (51), 24 states have return successors, (56), 35 states have call predecessors, (56), 37 states have call successors, (56)
[2025-04-28 21:21:44,280 INFO  L278                IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions.
[2025-04-28 21:21:44,284 INFO  L284                IsEmpty]: Finished isEmpty. Found accepting run of length 125
[2025-04-28 21:21:44,288 INFO  L210           NwaCegarLoop]: Found error trace
[2025-04-28 21:21:44,288 INFO  L218           NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2025-04-28 21:21:44,300 INFO  L552       MonitoredProcess]: [MP /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2025-04-28 21:21:44,492 WARN  L466      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /usr/bin/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2025-04-28 21:21:44,492 INFO  L403      AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] ===
[2025-04-28 21:21:44,493 INFO  L155       PredicateUnifier]: Initialized classic predicate unifier
[2025-04-28 21:21:44,493 INFO  L85        PathProgramCache]: Analyzing trace with hash 1396492585, now seen corresponding path program 1 times
[2025-04-28 21:21:44,493 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2025-04-28 21:21:44,493 INFO  L324   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754928353]
[2025-04-28 21:21:44,493 INFO  L97    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2025-04-28 21:21:44,493 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2025-04-28 21:21:44,554 INFO  L108    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 124 statements into 1 equivalence classes.
[2025-04-28 21:21:44,670 INFO  L111    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 124 of 124 statements.
[2025-04-28 21:21:44,670 INFO  L114    AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s)
[2025-04-28 21:21:44,670 INFO  L115    AnnotateAndAsserter]: Conjunction of SSA is unsat
