/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.ufo.BOUNDED-6.pals.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 00:14:04,840 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-04-01 00:14:04,843 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2023-04-01 00:14:04,900 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
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[2023-04-01 00:14:04,934 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 00:14:04,935 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 00:14:04,937 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf
[2023-04-01 00:14:04,971 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 00:14:04,971 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 00:14:04,971 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 00:14:04,972 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 00:14:04,972 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 00:14:04,973 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 00:14:04,973 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 00:14:04,973 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 00:14:04,973 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 00:14:04,973 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 00:14:04,974 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 00:14:04,974 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 00:14:04,974 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 00:14:04,974 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 00:14:04,974 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 00:14:04,975 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 00:14:04,975 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 00:14:04,975 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 00:14:04,975 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 00:14:04,976 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 00:14:04,976 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 00:14:04,976 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 00:14:04,976 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 00:14:04,976 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 00:14:04,976 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 00:14:04,976 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 00:14:04,977 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 00:14:04,977 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 00:14:04,977 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 00:14:04,977 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 00:14:04,977 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 00:14:04,977 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 00:14:04,977 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 00:14:04,977 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 00:14:04,978 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 00:14:04,978 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 00:14:04,978 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 00:14:04,978 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 00:14:04,978 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 00:14:04,978 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 00:14:04,978 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 00:14:04,978 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain
[2023-04-01 00:14:05,242 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 00:14:05,264 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 00:14:05,266 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 00:14:05,268 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 00:14:05,269 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 00:14:05,270 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.ufo.BOUNDED-6.pals.c
[2023-04-01 00:14:06,593 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 00:14:06,879 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 00:14:06,880 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.ufo.BOUNDED-6.pals.c
[2023-04-01 00:14:06,886 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dde48b2c/47415790a4024f25bf3781040fdf2b79/FLAGb11a11793
[2023-04-01 00:14:06,898 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5dde48b2c/47415790a4024f25bf3781040fdf2b79
[2023-04-01 00:14:06,901 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 00:14:06,902 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 00:14:06,903 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 00:14:06,903 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 00:14:06,907 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 00:14:06,908 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:14:06" (1/1) ...
[2023-04-01 00:14:06,909 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48dd516a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:06, skipping insertion in model container
[2023-04-01 00:14:06,909 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:14:06" (1/1) ...
[2023-04-01 00:14:06,914 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 00:14:06,949 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 00:14:07,114 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.ufo.BOUNDED-6.pals.c[5947,5960]
[2023-04-01 00:14:07,117 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 00:14:07,129 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 00:14:07,158 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.ufo.BOUNDED-6.pals.c[5947,5960]
[2023-04-01 00:14:07,158 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 00:14:07,171 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 00:14:07,172 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:07 WrapperNode
[2023-04-01 00:14:07,172 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 00:14:07,173 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 00:14:07,173 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 00:14:07,173 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 00:14:07,183 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:07" (1/1) ...
[2023-04-01 00:14:07,183 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:07" (1/1) ...
[2023-04-01 00:14:07,190 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:07" (1/1) ...
[2023-04-01 00:14:07,191 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:07" (1/1) ...
[2023-04-01 00:14:07,208 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:07" (1/1) ...
[2023-04-01 00:14:07,213 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:07" (1/1) ...
[2023-04-01 00:14:07,215 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:07" (1/1) ...
[2023-04-01 00:14:07,216 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:07" (1/1) ...
[2023-04-01 00:14:07,219 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 00:14:07,220 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 00:14:07,220 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 00:14:07,220 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 00:14:07,221 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:07" (1/1) ...
[2023-04-01 00:14:07,231 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 00:14:07,247 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 00:14:07,262 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-04-01 00:14:07,265 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-04-01 00:14:07,302 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 00:14:07,302 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 00:14:07,302 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 00:14:07,303 INFO  L138     BoogieDeclarations]: Found implementation of procedure node1
[2023-04-01 00:14:07,303 INFO  L138     BoogieDeclarations]: Found implementation of procedure node2
[2023-04-01 00:14:07,303 INFO  L138     BoogieDeclarations]: Found implementation of procedure node3
[2023-04-01 00:14:07,303 INFO  L138     BoogieDeclarations]: Found implementation of procedure init
[2023-04-01 00:14:07,303 INFO  L138     BoogieDeclarations]: Found implementation of procedure check
[2023-04-01 00:14:07,303 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 00:14:07,303 INFO  L138     BoogieDeclarations]: Found implementation of procedure assert
[2023-04-01 00:14:07,303 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 00:14:07,304 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 00:14:07,304 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 00:14:07,304 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 00:14:07,304 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2023-04-01 00:14:07,304 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2023-04-01 00:14:07,304 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2023-04-01 00:14:07,304 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2023-04-01 00:14:07,304 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2023-04-01 00:14:07,305 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2023-04-01 00:14:07,305 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2023-04-01 00:14:07,305 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2023-04-01 00:14:07,305 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2023-04-01 00:14:07,305 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2023-04-01 00:14:07,305 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 00:14:07,305 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 00:14:07,305 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 00:14:07,305 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 00:14:07,306 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 00:14:07,306 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 00:14:07,306 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 00:14:07,407 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 00:14:07,409 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 00:14:07,795 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 00:14:08,008 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 00:14:08,008 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 00:14:08,011 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:14:08 BoogieIcfgContainer
[2023-04-01 00:14:08,011 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 00:14:08,014 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 00:14:08,014 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 00:14:08,017 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 00:14:08,017 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:14:06" (1/3) ...
[2023-04-01 00:14:08,018 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fba852a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:14:08, skipping insertion in model container
[2023-04-01 00:14:08,018 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:14:07" (2/3) ...
[2023-04-01 00:14:08,018 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fba852a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:14:08, skipping insertion in model container
[2023-04-01 00:14:08,018 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:14:08" (3/3) ...
[2023-04-01 00:14:08,020 INFO  L112   eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c
[2023-04-01 00:14:08,036 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 00:14:08,037 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 00:14:08,122 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 00:14:08,156 INFO  L357      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, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@49f10bc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 00:14:08,157 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 00:14:08,169 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 40 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8)
[2023-04-01 00:14:08,181 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2023-04-01 00:14:08,182 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:14:08,183 INFO  L195           NwaCegarLoop]: trace histogram [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]
[2023-04-01 00:14:08,185 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:14:08,193 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:14:08,193 INFO  L85        PathProgramCache]: Analyzing trace with hash 543618519, now seen corresponding path program 1 times
[2023-04-01 00:14:08,201 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:14:08,202 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93019299]
[2023-04-01 00:14:08,203 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:14:08,203 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:14:08,484 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:14:09,836 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 00:14:09,837 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:14:09,837 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93019299]
[2023-04-01 00:14:09,837 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93019299] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 00:14:09,838 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 00:14:09,838 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15
[2023-04-01 00:14:09,839 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648223587]
[2023-04-01 00:14:09,840 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 00:14:09,843 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 15 states
[2023-04-01 00:14:09,844 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 00:14:09,866 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2023-04-01 00:14:09,867 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210
[2023-04-01 00:14:09,869 INFO  L87              Difference]: Start difference. First operand  has 40 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand  has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6)
[2023-04-01 00:14:10,396 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 00:14:10,396 INFO  L93              Difference]: Finished difference Result 125 states and 145 transitions.
[2023-04-01 00:14:10,397 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2023-04-01 00:14:10,398 INFO  L78                 Accepts]: Start accepts. Automaton has  has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 30
[2023-04-01 00:14:10,399 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 00:14:10,404 INFO  L225             Difference]: With dead ends: 125
[2023-04-01 00:14:10,404 INFO  L226             Difference]: Without dead ends: 82
[2023-04-01 00:14:10,406 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506
[2023-04-01 00:14:10,409 INFO  L413           NwaCegarLoop]: 24 mSDtfsCounter, 239 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2023-04-01 00:14:10,410 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 128 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2023-04-01 00:14:10,422 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 82 states.
[2023-04-01 00:14:10,441 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56.
[2023-04-01 00:14:10,442 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 56 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12)
[2023-04-01 00:14:10,442 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions.
[2023-04-01 00:14:10,443 INFO  L78                 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 30
[2023-04-01 00:14:10,444 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 00:14:10,444 INFO  L495      AbstractCegarLoop]: Abstraction has 56 states and 62 transitions.
[2023-04-01 00:14:10,444 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 15 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 6 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6)
[2023-04-01 00:14:10,444 INFO  L276                IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions.
[2023-04-01 00:14:10,445 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2023-04-01 00:14:10,445 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:14:10,445 INFO  L195           NwaCegarLoop]: trace histogram [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]
[2023-04-01 00:14:10,446 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 00:14:10,446 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:14:10,446 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:14:10,446 INFO  L85        PathProgramCache]: Analyzing trace with hash -857202552, now seen corresponding path program 1 times
[2023-04-01 00:14:10,446 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:14:10,447 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315205021]
[2023-04-01 00:14:10,447 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:14:10,447 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:14:10,468 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:14:10,698 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 00:14:10,698 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:14:10,698 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315205021]
[2023-04-01 00:14:10,699 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315205021] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 00:14:10,699 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 00:14:10,699 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2023-04-01 00:14:10,699 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596315103]
[2023-04-01 00:14:10,699 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 00:14:10,700 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2023-04-01 00:14:10,700 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 00:14:10,701 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2023-04-01 00:14:10,701 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72
[2023-04-01 00:14:10,701 INFO  L87              Difference]: Start difference. First operand 56 states and 62 transitions. Second operand  has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6)
[2023-04-01 00:14:10,902 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 00:14:10,903 INFO  L93              Difference]: Finished difference Result 116 states and 127 transitions.
[2023-04-01 00:14:10,903 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2023-04-01 00:14:10,904 INFO  L78                 Accepts]: Start accepts. Automaton has  has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 32
[2023-04-01 00:14:10,904 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 00:14:10,905 INFO  L225             Difference]: With dead ends: 116
[2023-04-01 00:14:10,905 INFO  L226             Difference]: Without dead ends: 85
[2023-04-01 00:14:10,905 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182
[2023-04-01 00:14:10,906 INFO  L413           NwaCegarLoop]: 21 mSDtfsCounter, 67 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-04-01 00:14:10,907 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 73 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-04-01 00:14:10,907 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 85 states.
[2023-04-01 00:14:10,931 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 56.
[2023-04-01 00:14:10,932 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 56 states, 32 states have (on average 1.15625) internal successors, (37), 33 states have internal predecessors, (37), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11)
[2023-04-01 00:14:10,936 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions.
[2023-04-01 00:14:10,936 INFO  L78                 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 32
[2023-04-01 00:14:10,936 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 00:14:10,937 INFO  L495      AbstractCegarLoop]: Abstraction has 56 states and 60 transitions.
[2023-04-01 00:14:10,937 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6)
[2023-04-01 00:14:10,937 INFO  L276                IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions.
[2023-04-01 00:14:10,938 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2023-04-01 00:14:10,938 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:14:10,938 INFO  L195           NwaCegarLoop]: trace histogram [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]
[2023-04-01 00:14:10,938 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 00:14:10,938 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:14:10,939 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:14:10,939 INFO  L85        PathProgramCache]: Analyzing trace with hash 2137120959, now seen corresponding path program 1 times
[2023-04-01 00:14:10,939 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:14:10,939 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264823395]
[2023-04-01 00:14:10,940 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:14:10,940 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:14:10,962 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:14:11,711 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 00:14:11,711 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:14:11,711 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264823395]
[2023-04-01 00:14:11,711 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264823395] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 00:14:11,711 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 00:14:11,711 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16
[2023-04-01 00:14:11,712 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162438041]
[2023-04-01 00:14:11,712 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 00:14:11,712 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 16 states
[2023-04-01 00:14:11,712 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 00:14:11,713 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2023-04-01 00:14:11,713 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240
[2023-04-01 00:14:11,713 INFO  L87              Difference]: Start difference. First operand 56 states and 60 transitions. Second operand  has 16 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2023-04-01 00:14:12,324 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 00:14:12,324 INFO  L93              Difference]: Finished difference Result 120 states and 131 transitions.
[2023-04-01 00:14:12,324 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2023-04-01 00:14:12,325 INFO  L78                 Accepts]: Start accepts. Automaton has  has 16 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 32
[2023-04-01 00:14:12,325 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 00:14:12,326 INFO  L225             Difference]: With dead ends: 120
[2023-04-01 00:14:12,326 INFO  L226             Difference]: Without dead ends: 90
[2023-04-01 00:14:12,327 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122
[2023-04-01 00:14:12,328 INFO  L413           NwaCegarLoop]: 20 mSDtfsCounter, 201 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time
[2023-04-01 00:14:12,329 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 92 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time]
[2023-04-01 00:14:12,329 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 90 states.
[2023-04-01 00:14:12,340 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 56.
[2023-04-01 00:14:12,341 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 56 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11)
[2023-04-01 00:14:12,341 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions.
[2023-04-01 00:14:12,342 INFO  L78                 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 32
[2023-04-01 00:14:12,342 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 00:14:12,342 INFO  L495      AbstractCegarLoop]: Abstraction has 56 states and 59 transitions.
[2023-04-01 00:14:12,342 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 16 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 7 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2023-04-01 00:14:12,342 INFO  L276                IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions.
[2023-04-01 00:14:12,343 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2023-04-01 00:14:12,343 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:14:12,343 INFO  L195           NwaCegarLoop]: trace histogram [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]
[2023-04-01 00:14:12,343 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-01 00:14:12,343 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:14:12,344 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:14:12,344 INFO  L85        PathProgramCache]: Analyzing trace with hash -1414527396, now seen corresponding path program 1 times
[2023-04-01 00:14:12,344 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:14:12,344 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895841821]
[2023-04-01 00:14:12,344 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:14:12,344 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:14:12,359 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:14:12,560 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 00:14:12,560 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:14:12,560 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895841821]
[2023-04-01 00:14:12,560 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895841821] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 00:14:12,561 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 00:14:12,561 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2023-04-01 00:14:12,561 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954186062]
[2023-04-01 00:14:12,561 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 00:14:12,561 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2023-04-01 00:14:12,562 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 00:14:12,562 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2023-04-01 00:14:12,562 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72
[2023-04-01 00:14:12,563 INFO  L87              Difference]: Start difference. First operand 56 states and 59 transitions. Second operand  has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6)
[2023-04-01 00:14:12,694 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 00:14:12,695 INFO  L93              Difference]: Finished difference Result 91 states and 101 transitions.
[2023-04-01 00:14:12,695 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2023-04-01 00:14:12,695 INFO  L78                 Accepts]: Start accepts. Automaton has  has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 33
[2023-04-01 00:14:12,696 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 00:14:12,699 INFO  L225             Difference]: With dead ends: 91
[2023-04-01 00:14:12,699 INFO  L226             Difference]: Without dead ends: 89
[2023-04-01 00:14:12,699 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240
[2023-04-01 00:14:12,707 INFO  L413           NwaCegarLoop]: 44 mSDtfsCounter, 35 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2023-04-01 00:14:12,708 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 321 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2023-04-01 00:14:12,711 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 89 states.
[2023-04-01 00:14:12,728 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65.
[2023-04-01 00:14:12,730 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 65 states, 38 states have (on average 1.105263157894737) internal successors, (42), 40 states have internal predecessors, (42), 13 states have call successors, (13), 13 states have call predecessors, (13), 13 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13)
[2023-04-01 00:14:12,731 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions.
[2023-04-01 00:14:12,731 INFO  L78                 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 33
[2023-04-01 00:14:12,731 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 00:14:12,731 INFO  L495      AbstractCegarLoop]: Abstraction has 65 states and 68 transitions.
[2023-04-01 00:14:12,732 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6)
[2023-04-01 00:14:12,732 INFO  L276                IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions.
[2023-04-01 00:14:12,734 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2023-04-01 00:14:12,734 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:14:12,735 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 00:14:12,735 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-01 00:14:12,735 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:14:12,736 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:14:12,736 INFO  L85        PathProgramCache]: Analyzing trace with hash -186027022, now seen corresponding path program 1 times
[2023-04-01 00:14:12,736 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:14:12,736 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907717263]
[2023-04-01 00:14:12,736 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:14:12,736 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:14:12,826 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:14:15,886 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2023-04-01 00:14:15,886 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:14:15,886 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907717263]
[2023-04-01 00:14:15,886 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907717263] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 00:14:15,887 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118404435]
[2023-04-01 00:14:15,887 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:14:15,887 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 00:14:15,887 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 00:14:15,889 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)
[2023-04-01 00:14:15,891 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-04-01 00:14:16,013 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:14:16,018 INFO  L262         TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 102 conjunts are in the unsatisfiable core
[2023-04-01 00:14:16,026 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 00:14:27,232 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 00:14:27,233 INFO  L327         TraceCheckSpWp]: Computing backward predicates...