/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.trace.refinement.strategy FOX -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/hardness-nfm22/hardness_floatingpointinfluence_no-floats_file-55.i


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


This is Ultimate 0.2.5-dev-17387ad-m
[2024-11-06 07:56:07,069 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2024-11-06 07:56:07,133 INFO  L114        SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf
[2024-11-06 07:56:07,137 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2024-11-06 07:56:07,137 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2024-11-06 07:56:07,164 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2024-11-06 07:56:07,164 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2024-11-06 07:56:07,165 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2024-11-06 07:56:07,165 INFO  L151        SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2024-11-06 07:56:07,166 INFO  L153        SettingsManager]:  * Use memory slicer=true
[2024-11-06 07:56:07,166 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-11-06 07:56:07,167 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-11-06 07:56:07,167 INFO  L151        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2024-11-06 07:56:07,168 INFO  L153        SettingsManager]:  * Create parallel compositions if possible=false
[2024-11-06 07:56:07,168 INFO  L153        SettingsManager]:  * Use SBE=true
[2024-11-06 07:56:07,168 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-11-06 07:56:07,168 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2024-11-06 07:56:07,169 INFO  L153        SettingsManager]:  * sizeof long=4
[2024-11-06 07:56:07,169 INFO  L153        SettingsManager]:  * sizeof POINTER=4
[2024-11-06 07:56:07,169 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2024-11-06 07:56:07,169 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2024-11-06 07:56:07,172 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-11-06 07:56:07,173 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2024-11-06 07:56:07,173 INFO  L153        SettingsManager]:  * Adapt memory model on pointer casts if necessary=true
[2024-11-06 07:56:07,173 INFO  L153        SettingsManager]:  * Use bitvectors instead of ints=true
[2024-11-06 07:56:07,173 INFO  L153        SettingsManager]:  * Allow undefined functions=false
[2024-11-06 07:56:07,173 INFO  L153        SettingsManager]:  * Memory model=HoenickeLindenmann_4ByteResolution
[2024-11-06 07:56:07,173 INFO  L153        SettingsManager]:  * sizeof long double=12
[2024-11-06 07:56:07,174 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2024-11-06 07:56:07,174 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2024-11-06 07:56:07,174 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-11-06 07:56:07,174 INFO  L153        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2024-11-06 07:56:07,174 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2024-11-06 07:56:07,174 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2024-11-06 07:56:07,175 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-11-06 07:56:07,175 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-11-06 07:56:07,175 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2024-11-06 07:56:07,175 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2024-11-06 07:56:07,175 INFO  L153        SettingsManager]:  * Trace refinement strategy=WOLF
[2024-11-06 07:56:07,176 INFO  L153        SettingsManager]:  * Command for external solver=cvc4 --incremental --print-success --lang smt
[2024-11-06 07:56:07,176 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2024-11-06 07:56:07,176 INFO  L153        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2024-11-06 07:56:07,176 INFO  L153        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2024-11-06 07:56:07,176 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2024-11-06 07:56:07,177 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/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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FOX
[2024-11-06 07:56:07,366 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2024-11-06 07:56:07,386 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-11-06 07:56:07,388 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-11-06 07:56:07,389 INFO  L270        PluginConnector]: Initializing CDTParser...
[2024-11-06 07:56:07,392 INFO  L274        PluginConnector]: CDTParser initialized
[2024-11-06 07:56:07,393 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_floatingpointinfluence_no-floats_file-55.i
[2024-11-06 07:56:08,628 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2024-11-06 07:56:08,768 INFO  L384              CDTParser]: Found 1 translation units.
[2024-11-06 07:56:08,768 INFO  L180              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_floatingpointinfluence_no-floats_file-55.i
[2024-11-06 07:56:08,774 INFO  L427              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4654ede83/351deb7be57f4b53824760c5cb52b7c2/FLAG4f31a533f
[2024-11-06 07:56:08,784 INFO  L435              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4654ede83/351deb7be57f4b53824760c5cb52b7c2
[2024-11-06 07:56:08,786 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-11-06 07:56:08,787 INFO  L133        ToolchainWalker]: Walking toolchain with 5 elements.
[2024-11-06 07:56:08,788 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-11-06 07:56:08,788 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-11-06 07:56:08,791 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2024-11-06 07:56:08,792 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:56:08" (1/1) ...
[2024-11-06 07:56:08,793 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d5a62ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:56:08, skipping insertion in model container
[2024-11-06 07:56:08,794 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:56:08" (1/1) ...
[2024-11-06 07:56:08,813 INFO  L175         MainTranslator]: Built tables and reachable declarations
[2024-11-06 07:56:08,943 WARN  L250   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_floatingpointinfluence_no-floats_file-55.i[916,929]
[2024-11-06 07:56:08,967 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-06 07:56:08,978 INFO  L200         MainTranslator]: Completed pre-run
[2024-11-06 07:56:08,986 WARN  L250   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_floatingpointinfluence_no-floats_file-55.i[916,929]
[2024-11-06 07:56:08,998 INFO  L210          PostProcessor]: Analyzing one entry point: main
[2024-11-06 07:56:09,014 INFO  L204         MainTranslator]: Completed translation
[2024-11-06 07:56:09,014 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:56:09 WrapperNode
[2024-11-06 07:56:09,014 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-11-06 07:56:09,015 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-11-06 07:56:09,015 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-11-06 07:56:09,016 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2024-11-06 07:56:09,020 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:56:09" (1/1) ...
[2024-11-06 07:56:09,027 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:56:09" (1/1) ...
[2024-11-06 07:56:09,043 INFO  L138                Inliner]: procedures = 27, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 111
[2024-11-06 07:56:09,044 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-11-06 07:56:09,044 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-11-06 07:56:09,044 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2024-11-06 07:56:09,044 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2024-11-06 07:56:09,052 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:56:09" (1/1) ...
[2024-11-06 07:56:09,052 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:56:09" (1/1) ...
[2024-11-06 07:56:09,055 INFO  L184        PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:56:09" (1/1) ...
[2024-11-06 07:56:09,062 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].
[2024-11-06 07:56:09,063 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:56:09" (1/1) ...
[2024-11-06 07:56:09,063 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:56:09" (1/1) ...
[2024-11-06 07:56:09,067 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:56:09" (1/1) ...
[2024-11-06 07:56:09,072 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:56:09" (1/1) ...
[2024-11-06 07:56:09,073 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:56:09" (1/1) ...
[2024-11-06 07:56:09,074 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:56:09" (1/1) ...
[2024-11-06 07:56:09,076 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-11-06 07:56:09,077 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-11-06 07:56:09,077 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2024-11-06 07:56:09,077 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2024-11-06 07:56:09,078 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:56:09" (1/1) ...
[2024-11-06 07:56:09,082 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-11-06 07:56:09,089 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 07:56:09,106 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null)
[2024-11-06 07:56:09,115 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process
[2024-11-06 07:56:09,136 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-11-06 07:56:09,136 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0
[2024-11-06 07:56:09,136 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2024-11-06 07:56:09,136 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2024-11-06 07:56:09,137 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-11-06 07:56:09,137 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-11-06 07:56:09,203 INFO  L238             CfgBuilder]: Building ICFG
[2024-11-06 07:56:09,205 INFO  L264             CfgBuilder]: Building CFG for each procedure with an implementation
[2024-11-06 07:56:09,395 INFO  L?                        ?]: Removed 16 outVars from TransFormulas that were not future-live.
[2024-11-06 07:56:09,395 INFO  L287             CfgBuilder]: Performing block encoding
[2024-11-06 07:56:09,407 INFO  L311             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-11-06 07:56:09,407 INFO  L316             CfgBuilder]: Removed 1 assume(true) statements.
[2024-11-06 07:56:09,408 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:56:09 BoogieIcfgContainer
[2024-11-06 07:56:09,408 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-11-06 07:56:09,409 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-11-06 07:56:09,409 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2024-11-06 07:56:09,412 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2024-11-06 07:56:09,412 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:56:08" (1/3) ...
[2024-11-06 07:56:09,413 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e07b44e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:56:09, skipping insertion in model container
[2024-11-06 07:56:09,413 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:56:09" (2/3) ...
[2024-11-06 07:56:09,413 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e07b44e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:56:09, skipping insertion in model container
[2024-11-06 07:56:09,413 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:56:09" (3/3) ...
[2024-11-06 07:56:09,414 INFO  L112   eAbstractionObserver]: Analyzing ICFG hardness_floatingpointinfluence_no-floats_file-55.i
[2024-11-06 07:56:09,426 INFO  L214   ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-11-06 07:56:09,427 INFO  L154   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2024-11-06 07:56:09,486 INFO  L332      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2024-11-06 07:56:09,492 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;@7fff7c42, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-11-06 07:56:09,493 INFO  L334      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2024-11-06 07:56:09,496 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 50 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 32 states have internal predecessors, (42), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16)
[2024-11-06 07:56:09,504 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 102
[2024-11-06 07:56:09,505 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 07:56:09,505 INFO  L215           NwaCegarLoop]: trace histogram [16, 16, 16, 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]
[2024-11-06 07:56:09,506 INFO  L396      AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 07:56:09,510 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 07:56:09,511 INFO  L85        PathProgramCache]: Analyzing trace with hash -1174662013, now seen corresponding path program 1 times
[2024-11-06 07:56:09,521 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 07:56:09,522 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8792182]
[2024-11-06 07:56:09,522 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 07:56:09,523 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 07:56:09,523 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 07:56:09,525 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-11-06 07:56:09,526 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2024-11-06 07:56:09,641 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 07:56:09,643 INFO  L255         TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 1 conjuncts are in the unsatisfiable core
[2024-11-06 07:56:09,649 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 07:56:09,678 INFO  L134       CoverageAnalysis]: Checked inductivity of 480 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked.
[2024-11-06 07:56:09,679 INFO  L307         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2024-11-06 07:56:09,679 INFO  L136   FreeRefinementEngine]: Strategy FOX found an infeasible trace
[2024-11-06 07:56:09,679 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8792182]
[2024-11-06 07:56:09,680 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [8792182] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-06 07:56:09,680 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-06 07:56:09,680 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2024-11-06 07:56:09,681 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154680668]
[2024-11-06 07:56:09,682 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-06 07:56:09,685 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2024-11-06 07:56:09,685 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX
[2024-11-06 07:56:09,701 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2024-11-06 07:56:09,701 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2024-11-06 07:56:09,703 INFO  L87              Difference]: Start difference. First operand  has 50 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 32 states have internal predecessors, (42), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand  has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16)
[2024-11-06 07:56:09,720 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-06 07:56:09,720 INFO  L93              Difference]: Finished difference Result 93 states and 158 transitions.
[2024-11-06 07:56:09,721 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2024-11-06 07:56:09,722 INFO  L78                 Accepts]: Start accepts. Automaton has  has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16) Word has length 101
[2024-11-06 07:56:09,722 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-06 07:56:09,727 INFO  L225             Difference]: With dead ends: 93
[2024-11-06 07:56:09,727 INFO  L226             Difference]: Without dead ends: 46
[2024-11-06 07:56:09,730 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2024-11-06 07:56:09,733 INFO  L432           NwaCegarLoop]: 67 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2024-11-06 07:56:09,734 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-11-06 07:56:09,747 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 46 states.
[2024-11-06 07:56:09,763 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46.
[2024-11-06 07:56:09,764 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 46 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16)
[2024-11-06 07:56:09,766 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 67 transitions.
[2024-11-06 07:56:09,767 INFO  L78                 Accepts]: Start accepts. Automaton has 46 states and 67 transitions. Word has length 101
[2024-11-06 07:56:09,767 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-06 07:56:09,767 INFO  L471      AbstractCegarLoop]: Abstraction has 46 states and 67 transitions.
[2024-11-06 07:56:09,768 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 2 states have call successors, (16)
[2024-11-06 07:56:09,768 INFO  L276                IsEmpty]: Start isEmpty. Operand 46 states and 67 transitions.
[2024-11-06 07:56:09,771 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 102
[2024-11-06 07:56:09,771 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 07:56:09,771 INFO  L215           NwaCegarLoop]: trace histogram [16, 16, 16, 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]
[2024-11-06 07:56:09,790 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2024-11-06 07:56:09,975 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 07:56:09,976 INFO  L396      AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 07:56:09,976 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 07:56:09,977 INFO  L85        PathProgramCache]: Analyzing trace with hash 730412163, now seen corresponding path program 1 times
[2024-11-06 07:56:09,977 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 07:56:09,977 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045863273]
[2024-11-06 07:56:09,977 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 07:56:09,978 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 07:56:09,978 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 07:56:09,980 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-11-06 07:56:09,981 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2024-11-06 07:56:10,092 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 07:56:10,094 INFO  L255         TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 2 conjuncts are in the unsatisfiable core
[2024-11-06 07:56:10,100 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 07:56:10,126 INFO  L134       CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked.
[2024-11-06 07:56:10,126 INFO  L307         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2024-11-06 07:56:10,126 INFO  L136   FreeRefinementEngine]: Strategy FOX found an infeasible trace
[2024-11-06 07:56:10,126 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045863273]
[2024-11-06 07:56:10,127 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045863273] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-06 07:56:10,127 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-06 07:56:10,127 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2024-11-06 07:56:10,127 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849080460]
[2024-11-06 07:56:10,127 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-06 07:56:10,128 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2024-11-06 07:56:10,128 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX
[2024-11-06 07:56:10,129 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2024-11-06 07:56:10,129 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-11-06 07:56:10,130 INFO  L87              Difference]: Start difference. First operand 46 states and 67 transitions. Second operand  has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16)
[2024-11-06 07:56:10,163 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-06 07:56:10,163 INFO  L93              Difference]: Finished difference Result 101 states and 146 transitions.
[2024-11-06 07:56:10,167 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2024-11-06 07:56:10,167 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 101
[2024-11-06 07:56:10,167 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-06 07:56:10,168 INFO  L225             Difference]: With dead ends: 101
[2024-11-06 07:56:10,169 INFO  L226             Difference]: Without dead ends: 58
[2024-11-06 07:56:10,169 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2024-11-06 07:56:10,170 INFO  L432           NwaCegarLoop]: 65 mSDtfsCounter, 15 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2024-11-06 07:56:10,170 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 121 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-11-06 07:56:10,171 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 58 states.
[2024-11-06 07:56:10,178 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47.
[2024-11-06 07:56:10,178 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 47 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16)
[2024-11-06 07:56:10,179 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 68 transitions.
[2024-11-06 07:56:10,179 INFO  L78                 Accepts]: Start accepts. Automaton has 47 states and 68 transitions. Word has length 101
[2024-11-06 07:56:10,180 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-06 07:56:10,180 INFO  L471      AbstractCegarLoop]: Abstraction has 47 states and 68 transitions.
[2024-11-06 07:56:10,180 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16)
[2024-11-06 07:56:10,181 INFO  L276                IsEmpty]: Start isEmpty. Operand 47 states and 68 transitions.
[2024-11-06 07:56:10,183 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 102
[2024-11-06 07:56:10,183 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 07:56:10,183 INFO  L215           NwaCegarLoop]: trace histogram [16, 16, 16, 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]
[2024-11-06 07:56:10,197 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2024-11-06 07:56:10,387 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 07:56:10,388 INFO  L396      AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 07:56:10,388 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 07:56:10,388 INFO  L85        PathProgramCache]: Analyzing trace with hash -1789547771, now seen corresponding path program 1 times
[2024-11-06 07:56:10,389 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 07:56:10,389 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573457292]
[2024-11-06 07:56:10,389 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 07:56:10,389 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 07:56:10,389 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 07:56:10,391 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-11-06 07:56:10,392 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2024-11-06 07:56:10,458 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 07:56:10,461 INFO  L255         TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 5 conjuncts are in the unsatisfiable core
[2024-11-06 07:56:10,464 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2024-11-06 07:56:10,692 INFO  L134       CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked.
[2024-11-06 07:56:10,692 INFO  L307         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2024-11-06 07:56:10,692 INFO  L136   FreeRefinementEngine]: Strategy FOX found an infeasible trace
[2024-11-06 07:56:10,693 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573457292]
[2024-11-06 07:56:10,693 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [573457292] provided 1 perfect and 0 imperfect interpolant sequences
[2024-11-06 07:56:10,693 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-11-06 07:56:10,693 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2024-11-06 07:56:10,693 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6408055]
[2024-11-06 07:56:10,693 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-11-06 07:56:10,694 INFO  L548      AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2024-11-06 07:56:10,694 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX
[2024-11-06 07:56:10,694 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2024-11-06 07:56:10,695 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2024-11-06 07:56:10,695 INFO  L87              Difference]: Start difference. First operand 47 states and 68 transitions. Second operand  has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16)
[2024-11-06 07:56:10,891 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-11-06 07:56:10,891 INFO  L93              Difference]: Finished difference Result 190 states and 277 transitions.
[2024-11-06 07:56:10,893 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2024-11-06 07:56:10,893 INFO  L78                 Accepts]: Start accepts. Automaton has  has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 101
[2024-11-06 07:56:10,894 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2024-11-06 07:56:10,895 INFO  L225             Difference]: With dead ends: 190
[2024-11-06 07:56:10,895 INFO  L226             Difference]: Without dead ends: 146
[2024-11-06 07:56:10,896 INFO  L431           NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110
[2024-11-06 07:56:10,900 INFO  L432           NwaCegarLoop]: 111 mSDtfsCounter, 125 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-11-06 07:56:10,900 INFO  L433           NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 403 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-11-06 07:56:10,901 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 146 states.
[2024-11-06 07:56:10,935 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121.
[2024-11-06 07:56:10,939 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 121 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 69 states have internal predecessors, (84), 48 states have call successors, (48), 3 states have call predecessors, (48), 3 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48)
[2024-11-06 07:56:10,941 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 180 transitions.
[2024-11-06 07:56:10,942 INFO  L78                 Accepts]: Start accepts. Automaton has 121 states and 180 transitions. Word has length 101
[2024-11-06 07:56:10,945 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2024-11-06 07:56:10,945 INFO  L471      AbstractCegarLoop]: Abstraction has 121 states and 180 transitions.
[2024-11-06 07:56:10,946 INFO  L472      AbstractCegarLoop]: INTERPOLANT automaton has  has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16)
[2024-11-06 07:56:10,946 INFO  L276                IsEmpty]: Start isEmpty. Operand 121 states and 180 transitions.
[2024-11-06 07:56:10,948 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 103
[2024-11-06 07:56:10,948 INFO  L207           NwaCegarLoop]: Found error trace
[2024-11-06 07:56:10,948 INFO  L215           NwaCegarLoop]: trace histogram [16, 16, 16, 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]
[2024-11-06 07:56:10,964 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0
[2024-11-06 07:56:11,154 WARN  L453      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 07:56:11,155 INFO  L396      AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-11-06 07:56:11,156 INFO  L157       PredicateUnifier]: Initialized classic predicate unifier
[2024-11-06 07:56:11,156 INFO  L85        PathProgramCache]: Analyzing trace with hash 123033650, now seen corresponding path program 1 times
[2024-11-06 07:56:11,156 INFO  L118   FreeRefinementEngine]: Executing refinement strategy FOX
[2024-11-06 07:56:11,156 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029176021]
[2024-11-06 07:56:11,156 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-11-06 07:56:11,157 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-11-06 07:56:11,157 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2024-11-06 07:56:11,158 INFO  L229       MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-11-06 07:56:11,159 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2024-11-06 07:56:11,234 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-11-06 07:56:11,235 INFO  L255         TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjuncts are in the unsatisfiable core
[2024-11-06 07:56:11,240 INFO  L278         TraceCheckSpWp]: Computing forward predicates...