./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/functions_1-2.c --full-output --architecture 32bit


--------------------------------------------------------------------------------


Checking for ERROR reachability
Using default analysis
Version 84cfde4a
Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/functions_1-2.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3c699f32b26271d9b8672d2685c3f1aa3d3ad54df32baf7d1d77d9a96ddd2517
--- Real Ultimate output ---
This is Ultimate 0.2.5-dev-84cfde4
[2024-10-11 01:49:26,841 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2024-10-11 01:49:26,911 INFO  L114        SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf
[2024-10-11 01:49:26,917 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2024-10-11 01:49:26,919 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2024-10-11 01:49:26,944 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2024-10-11 01:49:26,945 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2024-10-11 01:49:26,946 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2024-10-11 01:49:26,946 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2024-10-11 01:49:26,947 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2024-10-11 01:49:26,948 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-10-11 01:49:26,949 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-10-11 01:49:26,949 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2024-10-11 01:49:26,950 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2024-10-11 01:49:26,951 INFO  L153        SettingsManager]:  * Use SBE=true
[2024-10-11 01:49:26,952 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-10-11 01:49:26,952 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2024-10-11 01:49:26,952 INFO  L153        SettingsManager]:  * sizeof long=4
[2024-10-11 01:49:26,952 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2024-10-11 01:49:26,953 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2024-10-11 01:49:26,953 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2024-10-11 01:49:26,956 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2024-10-11 01:49:26,956 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-10-11 01:49:26,957 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2024-10-11 01:49:26,957 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2024-10-11 01:49:26,957 INFO  L153        SettingsManager]:  * sizeof long double=12
[2024-10-11 01:49:26,957 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2024-10-11 01:49:26,958 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2024-10-11 01:49:26,958 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-10-11 01:49:26,958 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2024-10-11 01:49:26,958 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2024-10-11 01:49:26,959 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2024-10-11 01:49:26,959 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-10-11 01:49:26,959 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-10-11 01:49:26,959 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2024-10-11 01:49:26,960 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2024-10-11 01:49:26,960 INFO  L153        SettingsManager]:  * Trace refinement strategy=CAMEL
[2024-10-11 01:49:26,960 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2024-10-11 01:49:26,960 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2024-10-11 01:49:26,961 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2024-10-11 01:49:26,961 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2024-10-11 01:49:26,962 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2024-10-11 01:49:26,963 INFO  L153        SettingsManager]:  * Looper check in Petri net analysis=SEMANTIC
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c699f32b26271d9b8672d2685c3f1aa3d3ad54df32baf7d1d77d9a96ddd2517
[2024-10-11 01:49:27,263 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2024-10-11 01:49:27,286 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-10-11 01:49:27,289 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-10-11 01:49:27,291 INFO  L270        PluginConnector]: Initializing CDTParser...
[2024-10-11 01:49:27,291 INFO  L274        PluginConnector]: CDTParser initialized
[2024-10-11 01:49:27,292 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/functions_1-2.c
[2024-10-11 01:49:28,766 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2024-10-11 01:49:28,941 INFO  L384              CDTParser]: Found 1 translation units.
[2024-10-11 01:49:28,942 INFO  L180              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/functions_1-2.c
[2024-10-11 01:49:28,954 INFO  L427              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/280e07970/aac846e3babb4c35899408a72ec84781/FLAGc3e6f1350
[2024-10-11 01:49:29,342 INFO  L435              CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/280e07970/aac846e3babb4c35899408a72ec84781
[2024-10-11 01:49:29,344 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-10-11 01:49:29,345 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2024-10-11 01:49:29,346 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-10-11 01:49:29,347 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-10-11 01:49:29,354 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2024-10-11 01:49:29,355 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 01:49:29" (1/1) ...
[2024-10-11 01:49:29,356 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6654d68a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:49:29, skipping insertion in model container
[2024-10-11 01:49:29,356 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 01:49:29" (1/1) ...
[2024-10-11 01:49:29,375 INFO  L175         MainTranslator]: Built tables and reachable declarations
[2024-10-11 01:49:29,541 WARN  L248   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/functions_1-2.c[325,338]
[2024-10-11 01:49:29,554 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-10-11 01:49:29,563 INFO  L200         MainTranslator]: Completed pre-run
[2024-10-11 01:49:29,578 WARN  L248   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/functions_1-2.c[325,338]
[2024-10-11 01:49:29,581 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-10-11 01:49:29,599 INFO  L204         MainTranslator]: Completed translation
[2024-10-11 01:49:29,599 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:49:29 WrapperNode
[2024-10-11 01:49:29,600 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-10-11 01:49:29,601 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-10-11 01:49:29,601 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-10-11 01:49:29,601 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2024-10-11 01:49:29,608 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:49:29" (1/1) ...
[2024-10-11 01:49:29,614 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:49:29" (1/1) ...
[2024-10-11 01:49:29,632 INFO  L138                Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 27
[2024-10-11 01:49:29,632 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-10-11 01:49:29,633 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-10-11 01:49:29,633 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2024-10-11 01:49:29,633 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2024-10-11 01:49:29,641 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:49:29" (1/1) ...
[2024-10-11 01:49:29,641 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:49:29" (1/1) ...
[2024-10-11 01:49:29,642 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:49:29" (1/1) ...
[2024-10-11 01:49:29,651 INFO  L175           MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0].
[2024-10-11 01:49:29,651 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:49:29" (1/1) ...
[2024-10-11 01:49:29,651 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:49:29" (1/1) ...
[2024-10-11 01:49:29,654 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:49:29" (1/1) ...
[2024-10-11 01:49:29,657 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:49:29" (1/1) ...
[2024-10-11 01:49:29,657 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:49:29" (1/1) ...
[2024-10-11 01:49:29,658 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:49:29" (1/1) ...
[2024-10-11 01:49:29,659 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-10-11 01:49:29,660 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-10-11 01:49:29,661 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2024-10-11 01:49:29,661 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2024-10-11 01:49:29,661 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:49:29" (1/1) ...
[2024-10-11 01:49:29,667 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-10-11 01:49:29,676 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3
[2024-10-11 01:49:29,689 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2024-10-11 01:49:29,691 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2024-10-11 01:49:29,734 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-10-11 01:49:29,734 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-10-11 01:49:29,734 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-10-11 01:49:29,734 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int#0
[2024-10-11 01:49:29,794 INFO  L238             CfgBuilder]: Building ICFG
[2024-10-11 01:49:29,798 INFO  L264             CfgBuilder]: Building CFG for each procedure with an implementation
[2024-10-11 01:49:29,928 INFO  L?                        ?]: Removed 10 outVars from TransFormulas that were not future-live.
[2024-10-11 01:49:29,929 INFO  L287             CfgBuilder]: Performing block encoding
[2024-10-11 01:49:29,956 INFO  L309             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-10-11 01:49:29,956 INFO  L314             CfgBuilder]: Removed 1 assume(true) statements.
[2024-10-11 01:49:29,957 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 01:49:29 BoogieIcfgContainer
[2024-10-11 01:49:29,957 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-10-11 01:49:29,959 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-10-11 01:49:29,959 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2024-10-11 01:49:29,962 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2024-10-11 01:49:29,962 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 01:49:29" (1/3) ...
[2024-10-11 01:49:29,963 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f2ccc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 01:49:29, skipping insertion in model container
[2024-10-11 01:49:29,963 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:49:29" (2/3) ...
[2024-10-11 01:49:29,963 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20f2ccc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 01:49:29, skipping insertion in model container
[2024-10-11 01:49:29,963 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 01:49:29" (3/3) ...
[2024-10-11 01:49:29,965 INFO  L112   eAbstractionObserver]: Analyzing ICFG functions_1-2.c
[2024-10-11 01:49:29,980 INFO  L209   ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-10-11 01:49:29,980 INFO  L149   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2024-10-11 01:49:30,026 INFO  L332      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2024-10-11 01:49:30,032 INFO  L333      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=LoopHeads, 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;@28bdc6da, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-10-11 01:49:30,032 INFO  L334      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-10-11 01:49:30,035 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-11 01:49:30,040 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 6
[2024-10-11 01:49:30,040 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-11 01:49:30,040 INFO  L215           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1]
[2024-10-11 01:49:30,041 INFO  L396      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-11 01:49:30,045 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-11 01:49:30,045 INFO  L85        PathProgramCache]: Analyzing trace with hash 59390442, now seen corresponding path program 1 times
[2024-10-11 01:49:30,051 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-10-11 01:49:30,052 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291400904]
[2024-10-11 01:49:30,052 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-11 01:49:30,052 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-10-11 01:49:30,149 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-11 01:49:30,271 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-11 01:49:30,272 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-10-11 01:49:30,272 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291400904]
[2024-10-11 01:49:30,273 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291400904] provided 1 perfect and 0 imperfect interpolant sequences
[2024-10-11 01:49:30,273 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-10-11 01:49:30,273 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2024-10-11 01:49:30,277 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371146739]
[2024-10-11 01:49:30,278 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-10-11 01:49:30,282 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2024-10-11 01:49:30,283 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-10-11 01:49:30,306 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2024-10-11 01:49:30,306 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-10-11 01:49:30,308 INFO  L87              Difference]: Start difference. First operand  has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand  has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-11 01:49:30,336 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-11 01:49:30,336 INFO  L93              Difference]: Finished difference Result 15 states and 19 transitions.
[2024-10-11 01:49:30,338 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2024-10-11 01:49:30,339 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5
[2024-10-11 01:49:30,339 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-11 01:49:30,344 INFO  L225             Difference]: With dead ends: 15
[2024-10-11 01:49:30,344 INFO  L226             Difference]: Without dead ends: 7
[2024-10-11 01:49:30,346 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-10-11 01:49:30,348 INFO  L432           NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2024-10-11 01:49:30,349 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-10-11 01:49:30,363 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7 states.
[2024-10-11 01:49:30,372 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7.
[2024-10-11 01:49:30,373 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-11 01:49:30,373 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions.
[2024-10-11 01:49:30,374 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5
[2024-10-11 01:49:30,374 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-11 01:49:30,375 INFO  L471      AbstractCegarLoop]: Abstraction has 7 states and 7 transitions.
[2024-10-11 01:49:30,375 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-11 01:49:30,375 INFO  L276                IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions.
[2024-10-11 01:49:30,375 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2024-10-11 01:49:30,375 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-11 01:49:30,375 INFO  L215           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2024-10-11 01:49:30,376 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2024-10-11 01:49:30,376 INFO  L396      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-11 01:49:30,376 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-11 01:49:30,377 INFO  L85        PathProgramCache]: Analyzing trace with hash 1862103434, now seen corresponding path program 1 times
[2024-10-11 01:49:30,377 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-10-11 01:49:30,377 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977178122]
[2024-10-11 01:49:30,377 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-11 01:49:30,377 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-10-11 01:49:30,389 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-11 01:49:30,504 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-11 01:49:30,505 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-10-11 01:49:30,505 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977178122]
[2024-10-11 01:49:30,505 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977178122] provided 0 perfect and 1 imperfect interpolant sequences
[2024-10-11 01:49:30,506 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733410263]
[2024-10-11 01:49:30,506 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-11 01:49:30,506 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-11 01:49:30,506 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3
[2024-10-11 01:49:30,508 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-10-11 01:49:30,510 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2024-10-11 01:49:30,554 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-11 01:49:30,556 INFO  L255         TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjuncts are in the unsatisfiable core
[2024-10-11 01:49:30,560 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-10-11 01:49:30,595 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-11 01:49:30,595 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-10-11 01:49:30,648 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-11 01:49:30,649 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733410263] provided 0 perfect and 2 imperfect interpolant sequences
[2024-10-11 01:49:30,649 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2024-10-11 01:49:30,649 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6
[2024-10-11 01:49:30,650 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809796587]
[2024-10-11 01:49:30,651 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2024-10-11 01:49:30,651 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 7 states
[2024-10-11 01:49:30,651 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-10-11 01:49:30,652 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2024-10-11 01:49:30,653 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42
[2024-10-11 01:49:30,653 INFO  L87              Difference]: Start difference. First operand 7 states and 7 transitions. Second operand  has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-11 01:49:30,707 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-11 01:49:30,709 INFO  L93              Difference]: Finished difference Result 14 states and 16 transitions.
[2024-10-11 01:49:30,710 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2024-10-11 01:49:30,710 INFO  L78                 Accepts]: Start accepts. Automaton has  has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6
[2024-10-11 01:49:30,710 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-11 01:49:30,711 INFO  L225             Difference]: With dead ends: 14
[2024-10-11 01:49:30,711 INFO  L226             Difference]: Without dead ends: 10
[2024-10-11 01:49:30,712 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56
[2024-10-11 01:49:30,713 INFO  L432           NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2024-10-11 01:49:30,714 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-10-11 01:49:30,716 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10 states.
[2024-10-11 01:49:30,721 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10.
[2024-10-11 01:49:30,722 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-11 01:49:30,722 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions.
[2024-10-11 01:49:30,722 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6
[2024-10-11 01:49:30,723 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-11 01:49:30,724 INFO  L471      AbstractCegarLoop]: Abstraction has 10 states and 10 transitions.
[2024-10-11 01:49:30,724 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-11 01:49:30,724 INFO  L276                IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions.
[2024-10-11 01:49:30,724 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2024-10-11 01:49:30,725 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-11 01:49:30,725 INFO  L215           NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1]
[2024-10-11 01:49:30,739 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2024-10-11 01:49:30,929 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-11 01:49:30,930 INFO  L396      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-11 01:49:30,931 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-11 01:49:30,931 INFO  L85        PathProgramCache]: Analyzing trace with hash -496295446, now seen corresponding path program 2 times
[2024-10-11 01:49:30,931 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-10-11 01:49:30,931 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714456823]
[2024-10-11 01:49:30,931 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-11 01:49:30,931 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-10-11 01:49:30,950 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-11 01:49:31,159 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-11 01:49:31,159 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-10-11 01:49:31,160 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714456823]
[2024-10-11 01:49:31,160 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714456823] provided 0 perfect and 1 imperfect interpolant sequences
[2024-10-11 01:49:31,160 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208236394]
[2024-10-11 01:49:31,160 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2024-10-11 01:49:31,161 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-11 01:49:31,164 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3
[2024-10-11 01:49:31,167 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-10-11 01:49:31,170 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2024-10-11 01:49:31,206 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2024-10-11 01:49:31,207 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2024-10-11 01:49:31,208 INFO  L255         TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 11 conjuncts are in the unsatisfiable core
[2024-10-11 01:49:31,209 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-10-11 01:49:31,244 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-11 01:49:31,248 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-10-11 01:49:31,365 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-11 01:49:31,365 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [208236394] provided 0 perfect and 2 imperfect interpolant sequences
[2024-10-11 01:49:31,365 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2024-10-11 01:49:31,365 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12
[2024-10-11 01:49:31,366 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408265863]
[2024-10-11 01:49:31,366 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2024-10-11 01:49:31,366 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 13 states
[2024-10-11 01:49:31,366 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-10-11 01:49:31,367 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2024-10-11 01:49:31,367 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156
[2024-10-11 01:49:31,368 INFO  L87              Difference]: Start difference. First operand 10 states and 10 transitions. Second operand  has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-11 01:49:31,564 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-11 01:49:31,564 INFO  L93              Difference]: Finished difference Result 20 states and 25 transitions.
[2024-10-11 01:49:31,565 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2024-10-11 01:49:31,565 INFO  L78                 Accepts]: Start accepts. Automaton has  has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9
[2024-10-11 01:49:31,565 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-11 01:49:31,566 INFO  L225             Difference]: With dead ends: 20
[2024-10-11 01:49:31,566 INFO  L226             Difference]: Without dead ends: 16
[2024-10-11 01:49:31,568 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272
[2024-10-11 01:49:31,570 INFO  L432           NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2024-10-11 01:49:31,571 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-10-11 01:49:31,573 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16 states.
[2024-10-11 01:49:31,578 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16.
[2024-10-11 01:49:31,579 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-11 01:49:31,579 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions.
[2024-10-11 01:49:31,580 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 9
[2024-10-11 01:49:31,580 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-11 01:49:31,580 INFO  L471      AbstractCegarLoop]: Abstraction has 16 states and 16 transitions.
[2024-10-11 01:49:31,581 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-11 01:49:31,581 INFO  L276                IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions.
[2024-10-11 01:49:31,581 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2024-10-11 01:49:31,581 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-11 01:49:31,581 INFO  L215           NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1]
[2024-10-11 01:49:31,603 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2024-10-11 01:49:31,785 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-11 01:49:31,786 INFO  L396      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-11 01:49:31,787 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-11 01:49:31,787 INFO  L85        PathProgramCache]: Analyzing trace with hash -120914454, now seen corresponding path program 3 times
[2024-10-11 01:49:31,787 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-10-11 01:49:31,787 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121148884]
[2024-10-11 01:49:31,787 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-11 01:49:31,788 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-10-11 01:49:31,809 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-11 01:49:32,065 INFO  L134       CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-11 01:49:32,066 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-10-11 01:49:32,066 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121148884]
[2024-10-11 01:49:32,066 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121148884] provided 0 perfect and 1 imperfect interpolant sequences
[2024-10-11 01:49:32,066 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999246502]
[2024-10-11 01:49:32,066 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2024-10-11 01:49:32,066 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-11 01:49:32,067 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3
[2024-10-11 01:49:32,070 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-10-11 01:49:32,072 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2024-10-11 01:49:32,127 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s)
[2024-10-11 01:49:32,127 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2024-10-11 01:49:32,129 INFO  L255         TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 23 conjuncts are in the unsatisfiable core
[2024-10-11 01:49:32,130 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-10-11 01:49:32,181 INFO  L134       CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-11 01:49:32,182 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-10-11 01:49:32,504 INFO  L134       CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-11 01:49:32,506 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [999246502] provided 0 perfect and 2 imperfect interpolant sequences
[2024-10-11 01:49:32,506 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2024-10-11 01:49:32,506 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24
[2024-10-11 01:49:32,506 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820564558]
[2024-10-11 01:49:32,506 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2024-10-11 01:49:32,507 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 25 states
[2024-10-11 01:49:32,507 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-10-11 01:49:32,509 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants.
[2024-10-11 01:49:32,509 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600
[2024-10-11 01:49:32,510 INFO  L87              Difference]: Start difference. First operand 16 states and 16 transitions. Second operand  has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-11 01:49:35,772 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-11 01:49:35,772 INFO  L93              Difference]: Finished difference Result 32 states and 43 transitions.
[2024-10-11 01:49:35,772 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2024-10-11 01:49:35,773 INFO  L78                 Accepts]: Start accepts. Automaton has  has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15
[2024-10-11 01:49:35,773 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-11 01:49:35,774 INFO  L225             Difference]: With dead ends: 32
[2024-10-11 01:49:35,774 INFO  L226             Difference]: Without dead ends: 28
[2024-10-11 01:49:35,775 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190
[2024-10-11 01:49:35,775 INFO  L432           NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-10-11 01:49:35,776 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-10-11 01:49:35,776 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2024-10-11 01:49:35,782 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2024-10-11 01:49:35,782 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-11 01:49:35,783 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions.
[2024-10-11 01:49:35,783 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 15
[2024-10-11 01:49:35,783 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-11 01:49:35,783 INFO  L471      AbstractCegarLoop]: Abstraction has 28 states and 28 transitions.
[2024-10-11 01:49:35,783 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-11 01:49:35,784 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions.
[2024-10-11 01:49:35,784 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2024-10-11 01:49:35,784 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-11 01:49:35,784 INFO  L215           NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1]
[2024-10-11 01:49:35,801 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2024-10-11 01:49:35,988 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-11 01:49:35,989 INFO  L396      AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-11 01:49:35,989 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-11 01:49:35,989 INFO  L85        PathProgramCache]: Analyzing trace with hash -2142521878, now seen corresponding path program 4 times
[2024-10-11 01:49:35,990 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-10-11 01:49:35,990 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041106144]
[2024-10-11 01:49:35,990 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-11 01:49:35,990 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-10-11 01:49:36,022 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-11 01:49:36,565 INFO  L134       CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-11 01:49:36,567 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-10-11 01:49:36,567 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041106144]
[2024-10-11 01:49:36,567 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041106144] provided 0 perfect and 1 imperfect interpolant sequences
[2024-10-11 01:49:36,567 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303704987]
[2024-10-11 01:49:36,568 INFO  L93    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2024-10-11 01:49:36,568 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-11 01:49:36,568 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3
[2024-10-11 01:49:36,574 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-10-11 01:49:36,575 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2024-10-11 01:49:36,631 INFO  L228   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2024-10-11 01:49:36,631 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2024-10-11 01:49:36,632 INFO  L255         TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 47 conjuncts are in the unsatisfiable core
[2024-10-11 01:49:36,634 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-10-11 01:49:36,703 INFO  L134       CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-11 01:49:36,703 INFO  L311         TraceCheckSpWp]: Computing backward predicates...
[2024-10-11 01:49:37,608 INFO  L134       CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-11 01:49:37,608 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303704987] provided 0 perfect and 2 imperfect interpolant sequences
[2024-10-11 01:49:37,608 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2024-10-11 01:49:37,609 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48
[2024-10-11 01:49:37,609 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174270220]
[2024-10-11 01:49:37,609 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2024-10-11 01:49:37,609 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 49 states
[2024-10-11 01:49:37,609 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-10-11 01:49:37,610 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants.
[2024-10-11 01:49:37,612 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=1682, Unknown=0, NotChecked=0, Total=2352
[2024-10-11 01:49:37,612 INFO  L87              Difference]: Start difference. First operand 28 states and 28 transitions. Second operand  has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-11 01:51:07,505 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-10-11 01:51:07,506 INFO  L93              Difference]: Finished difference Result 56 states and 79 transitions.
[2024-10-11 01:51:07,507 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. 
[2024-10-11 01:51:07,507 INFO  L78                 Accepts]: Start accepts. Automaton has  has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27
[2024-10-11 01:51:07,507 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-10-11 01:51:07,508 INFO  L225             Difference]: With dead ends: 56
[2024-10-11 01:51:07,509 INFO  L226             Difference]: Without dead ends: 52
[2024-10-11 01:51:07,511 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 90.7s TimeCoverageRelationStatistics Valid=1748, Invalid=3222, Unknown=0, NotChecked=0, Total=4970
[2024-10-11 01:51:07,512 INFO  L432           NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2024-10-11 01:51:07,512 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2024-10-11 01:51:07,513 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 52 states.
[2024-10-11 01:51:07,524 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52.
[2024-10-11 01:51:07,525 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 52 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-11 01:51:07,527 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions.
[2024-10-11 01:51:07,528 INFO  L78                 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 27
[2024-10-11 01:51:07,528 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-10-11 01:51:07,528 INFO  L471      AbstractCegarLoop]: Abstraction has 52 states and 52 transitions.
[2024-10-11 01:51:07,528 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-10-11 01:51:07,528 INFO  L276                IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions.
[2024-10-11 01:51:07,531 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 52
[2024-10-11 01:51:07,531 INFO  L207           NwaCegarLoop]: Found error trace
[2024-10-11 01:51:07,531 INFO  L215           NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1]
[2024-10-11 01:51:07,546 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2024-10-11 01:51:07,731 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-11 01:51:07,732 INFO  L396      AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-10-11 01:51:07,732 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-10-11 01:51:07,732 INFO  L85        PathProgramCache]: Analyzing trace with hash -1286527510, now seen corresponding path program 5 times
[2024-10-11 01:51:07,732 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-10-11 01:51:07,733 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208993657]
[2024-10-11 01:51:07,733 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-10-11 01:51:07,733 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-10-11 01:51:07,775 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-10-11 01:51:09,181 INFO  L134       CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-11 01:51:09,181 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-10-11 01:51:09,181 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208993657]
[2024-10-11 01:51:09,181 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208993657] provided 0 perfect and 1 imperfect interpolant sequences
[2024-10-11 01:51:09,182 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568996305]
[2024-10-11 01:51:09,182 INFO  L93    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
[2024-10-11 01:51:09,182 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-10-11 01:51:09,182 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3
[2024-10-11 01:51:09,183 INFO  L229       MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-10-11 01:51:09,183 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2024-10-11 01:51:10,045 INFO  L228   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s)
[2024-10-11 01:51:10,045 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2024-10-11 01:51:10,047 WARN  L253         TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 95 conjuncts are in the unsatisfiable core
[2024-10-11 01:51:10,049 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-10-11 01:51:10,174 INFO  L134       CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2024-10-11 01:51:10,175 INFO  L311         TraceCheckSpWp]: Computing backward predicates...