/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 EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem16_label20.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 10:20:39,676 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2023-04-01 10:20:39,718 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2023-04-01 10:20:39,720 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2023-04-01 10:20:39,723 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2023-04-01 10:20:39,725 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2023-04-01 10:20:39,731 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2023-04-01 10:20:39,731 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
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[2023-04-01 10:20:39,732 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
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[2023-04-01 10:20:39,734 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2023-04-01 10:20:39,734 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2023-04-01 10:20:39,735 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2023-04-01 10:20:39,736 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2023-04-01 10:20:39,737 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2023-04-01 10:20:39,758 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 10:20:39,760 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 10:20:39,761 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 10:20:39,790 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 10:20:39,791 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 10:20:39,791 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 10:20:39,791 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 10:20:39,792 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 10:20:39,792 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 10:20:39,792 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 10:20:39,792 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 10:20:39,792 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 10:20:39,792 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 10:20:39,793 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 10:20:39,793 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 10:20:39,793 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 10:20:39,793 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 10:20:39,793 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 10:20:39,793 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 10:20:39,793 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 10:20:39,793 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 10:20:39,794 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 10:20:39,794 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 10:20:39,794 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 10:20:39,794 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 10:20:39,794 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 10:20:39,794 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 10:20:39,795 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 10:20:39,795 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 10:20:39,795 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 10:20:39,795 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 10:20:39,795 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 10:20:39,795 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 10:20:39,795 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 10:20:39,796 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 10:20:39,796 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:20:39,796 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 10:20:39,796 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 10:20:39,796 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 10:20:39,796 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 10:20:39,796 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 10:20:39,796 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 10:20:39,796 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 10:20:39,796 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 10:20:39,796 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain
[2023-04-01 10:20:39,997 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 10:20:40,015 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 10:20:40,017 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 10:20:40,018 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 10:20:40,018 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 10:20:40,019 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label20.c
[2023-04-01 10:20:41,028 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 10:20:41,272 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 10:20:41,273 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label20.c
[2023-04-01 10:20:41,284 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00f4585aa/8a528f60206f41a382c367365513a716/FLAG2d46bbf34
[2023-04-01 10:20:41,293 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00f4585aa/8a528f60206f41a382c367365513a716
[2023-04-01 10:20:41,295 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 10:20:41,296 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 10:20:41,296 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 10:20:41,297 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 10:20:41,299 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 10:20:41,299 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:20:41" (1/1) ...
[2023-04-01 10:20:41,300 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@272b295f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:20:41, skipping insertion in model container
[2023-04-01 10:20:41,300 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:20:41" (1/1) ...
[2023-04-01 10:20:41,304 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 10:20:41,338 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 10:20:41,470 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/eca-rers2012/Problem16_label20.c[2717,2730]
[2023-04-01 10:20:41,775 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:20:41,784 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 10:20:41,802 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/eca-rers2012/Problem16_label20.c[2717,2730]
[2023-04-01 10:20:41,934 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 10:20:41,946 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 10:20:41,947 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:20:41 WrapperNode
[2023-04-01 10:20:41,947 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 10:20:41,948 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 10:20:41,948 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 10:20:41,948 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 10:20:41,956 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:20:41" (1/1) ...
[2023-04-01 10:20:41,956 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:20:41" (1/1) ...
[2023-04-01 10:20:41,982 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:20:41" (1/1) ...
[2023-04-01 10:20:41,982 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:20:41" (1/1) ...
[2023-04-01 10:20:42,035 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:20:41" (1/1) ...
[2023-04-01 10:20:42,051 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:20:41" (1/1) ...
[2023-04-01 10:20:42,065 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:20:41" (1/1) ...
[2023-04-01 10:20:42,072 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:20:41" (1/1) ...
[2023-04-01 10:20:42,082 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 10:20:42,084 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 10:20:42,084 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 10:20:42,084 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 10:20:42,085 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:20:41" (1/1) ...
[2023-04-01 10:20:42,091 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 10:20:42,098 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:20:42,108 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 10:20:42,135 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 10:20:42,135 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 10:20:42,135 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 10:20:42,135 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2023-04-01 10:20:42,135 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2023-04-01 10:20:42,136 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 10:20:42,136 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2023-04-01 10:20:42,136 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2023-04-01 10:20:42,136 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 10:20:42,136 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 10:20:42,136 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 10:20:42,136 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 10:20:42,136 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2023-04-01 10:20:42,136 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2023-04-01 10:20:42,136 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 10:20:42,124 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 10:20:42,137 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 10:20:42,137 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 10:20:42,137 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 10:20:42,137 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 10:20:42,137 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 10:20:42,137 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 10:20:42,204 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 10:20:42,206 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 10:20:43,677 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 10:20:44,464 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 10:20:44,464 INFO  L302             CfgBuilder]: Removed 1 assume(true) statements.
[2023-04-01 10:20:44,468 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:20:44 BoogieIcfgContainer
[2023-04-01 10:20:44,469 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 10:20:44,470 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 10:20:44,471 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 10:20:44,473 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 10:20:44,473 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:20:41" (1/3) ...
[2023-04-01 10:20:44,474 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef30a90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:20:44, skipping insertion in model container
[2023-04-01 10:20:44,474 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:20:41" (2/3) ...
[2023-04-01 10:20:44,474 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef30a90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:20:44, skipping insertion in model container
[2023-04-01 10:20:44,474 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:20:44" (3/3) ...
[2023-04-01 10:20:44,475 INFO  L112   eAbstractionObserver]: Analyzing ICFG Problem16_label20.c
[2023-04-01 10:20:44,488 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 10:20:44,488 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 10:20:44,536 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 10:20:44,541 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;@1a5f7058, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 10:20:44,542 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 10:20:44,547 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)
[2023-04-01 10:20:44,552 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2023-04-01 10:20:44,552 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:20:44,552 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:20:44,553 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:20:44,557 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:20:44,557 INFO  L85        PathProgramCache]: Analyzing trace with hash -706738842, now seen corresponding path program 1 times
[2023-04-01 10:20:44,564 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:20:44,565 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867881440]
[2023-04-01 10:20:44,565 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:20:44,565 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:20:44,660 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:20:44,838 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 10:20:44,839 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:20:44,839 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867881440]
[2023-04-01 10:20:44,839 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867881440] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:20:44,840 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:20:44,840 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 10:20:44,841 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025443560]
[2023-04-01 10:20:44,841 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:20:44,844 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 10:20:44,844 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:20:44,862 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 10:20:44,862 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:20:44,864 INFO  L87              Difference]: Start difference. First operand  has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 10:20:45,887 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:20:45,887 INFO  L93              Difference]: Finished difference Result 718 states and 1389 transitions.
[2023-04-01 10:20:45,888 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 10:20:45,889 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11
[2023-04-01 10:20:45,889 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:20:45,899 INFO  L225             Difference]: With dead ends: 718
[2023-04-01 10:20:45,899 INFO  L226             Difference]: Without dead ends: 471
[2023-04-01 10:20:45,903 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 10:20:45,905 INFO  L413           NwaCegarLoop]: 59 mSDtfsCounter, 300 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2023-04-01 10:20:45,905 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 74 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2023-04-01 10:20:45,917 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 471 states.
[2023-04-01 10:20:45,945 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 467.
[2023-04-01 10:20:45,947 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 467 states, 457 states have (on average 1.87308533916849) internal successors, (856), 457 states have internal predecessors, (856), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6)
[2023-04-01 10:20:45,948 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 867 transitions.
[2023-04-01 10:20:45,949 INFO  L78                 Accepts]: Start accepts. Automaton has 467 states and 867 transitions. Word has length 11
[2023-04-01 10:20:45,949 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:20:45,950 INFO  L495      AbstractCegarLoop]: Abstraction has 467 states and 867 transitions.
[2023-04-01 10:20:45,950 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 10:20:45,950 INFO  L276                IsEmpty]: Start isEmpty. Operand 467 states and 867 transitions.
[2023-04-01 10:20:45,952 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 60
[2023-04-01 10:20:45,952 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:20:45,952 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:20:45,952 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 10:20:45,952 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:20:45,953 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:20:45,953 INFO  L85        PathProgramCache]: Analyzing trace with hash -1465201525, now seen corresponding path program 1 times
[2023-04-01 10:20:45,953 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:20:45,953 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782153942]
[2023-04-01 10:20:45,953 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:20:45,953 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:20:45,988 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:20:46,247 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-04-01 10:20:46,247 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:20:46,248 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782153942]
[2023-04-01 10:20:46,248 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782153942] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:20:46,248 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 10:20:46,248 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-04-01 10:20:46,248 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136037928]
[2023-04-01 10:20:46,248 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:20:46,249 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:20:46,249 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:20:46,250 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:20:46,250 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-04-01 10:20:46,251 INFO  L87              Difference]: Start difference. First operand 467 states and 867 transitions. Second operand  has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 10:20:47,944 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:20:47,944 INFO  L93              Difference]: Finished difference Result 1405 states and 2628 transitions.
[2023-04-01 10:20:47,945 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 10:20:47,945 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 59
[2023-04-01 10:20:47,945 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:20:47,950 INFO  L225             Difference]: With dead ends: 1405
[2023-04-01 10:20:47,950 INFO  L226             Difference]: Without dead ends: 943
[2023-04-01 10:20:47,951 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2023-04-01 10:20:47,952 INFO  L413           NwaCegarLoop]: 16 mSDtfsCounter, 922 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time
[2023-04-01 10:20:47,952 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 45 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time]
[2023-04-01 10:20:47,954 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 943 states.
[2023-04-01 10:20:48,000 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 714.
[2023-04-01 10:20:48,001 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 714 states, 695 states have (on average 1.720863309352518) internal successors, (1196), 698 states have internal predecessors, (1196), 8 states have call successors, (8), 8 states have call predecessors, (8), 10 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21)
[2023-04-01 10:20:48,004 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1225 transitions.
[2023-04-01 10:20:48,004 INFO  L78                 Accepts]: Start accepts. Automaton has 714 states and 1225 transitions. Word has length 59
[2023-04-01 10:20:48,011 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:20:48,011 INFO  L495      AbstractCegarLoop]: Abstraction has 714 states and 1225 transitions.
[2023-04-01 10:20:48,011 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 10:20:48,012 INFO  L276                IsEmpty]: Start isEmpty. Operand 714 states and 1225 transitions.
[2023-04-01 10:20:48,021 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 116
[2023-04-01 10:20:48,021 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:20:48,021 INFO  L195           NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2023-04-01 10:20:48,022 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 10:20:48,022 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:20:48,022 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:20:48,022 INFO  L85        PathProgramCache]: Analyzing trace with hash 540163104, now seen corresponding path program 1 times
[2023-04-01 10:20:48,023 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:20:48,023 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207254957]
[2023-04-01 10:20:48,023 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:20:48,023 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:20:48,056 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:20:48,301 INFO  L134       CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 44 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2023-04-01 10:20:48,301 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:20:48,301 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207254957]
[2023-04-01 10:20:48,301 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207254957] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 10:20:48,301 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877305942]
[2023-04-01 10:20:48,301 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:20:48,302 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:20:48,302 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:20:48,330 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 10:20:48,334 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 10:20:48,457 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:20:48,460 INFO  L262         TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 6 conjunts are in the unsatisfiable core
[2023-04-01 10:20:48,467 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 10:20:48,669 INFO  L134       CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-04-01 10:20:48,669 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-04-01 10:20:48,669 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [877305942] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 10:20:48,669 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-04-01 10:20:48,669 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8
[2023-04-01 10:20:48,669 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998281856]
[2023-04-01 10:20:48,670 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 10:20:48,670 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-04-01 10:20:48,670 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 10:20:48,671 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-04-01 10:20:48,671 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2023-04-01 10:20:48,671 INFO  L87              Difference]: Start difference. First operand 714 states and 1225 transitions. Second operand  has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2023-04-01 10:20:49,887 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 10:20:49,887 INFO  L93              Difference]: Finished difference Result 1907 states and 3294 transitions.
[2023-04-01 10:20:49,888 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2023-04-01 10:20:49,888 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 115
[2023-04-01 10:20:49,888 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 10:20:49,893 INFO  L225             Difference]: With dead ends: 1907
[2023-04-01 10:20:49,893 INFO  L226             Difference]: Without dead ends: 1198
[2023-04-01 10:20:49,895 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2023-04-01 10:20:49,895 INFO  L413           NwaCegarLoop]: 17 mSDtfsCounter, 799 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time
[2023-04-01 10:20:49,896 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 46 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time]
[2023-04-01 10:20:49,897 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1198 states.
[2023-04-01 10:20:49,978 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1176.
[2023-04-01 10:20:49,979 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 1176 states, 1148 states have (on average 1.5609756097560976) internal successors, (1792), 1154 states have internal predecessors, (1792), 11 states have call successors, (11), 11 states have call predecessors, (11), 16 states have return successors, (50), 10 states have call predecessors, (50), 10 states have call successors, (50)
[2023-04-01 10:20:49,984 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1853 transitions.
[2023-04-01 10:20:49,984 INFO  L78                 Accepts]: Start accepts. Automaton has 1176 states and 1853 transitions. Word has length 115
[2023-04-01 10:20:49,985 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 10:20:49,985 INFO  L495      AbstractCegarLoop]: Abstraction has 1176 states and 1853 transitions.
[2023-04-01 10:20:49,986 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)
[2023-04-01 10:20:49,986 INFO  L276                IsEmpty]: Start isEmpty. Operand 1176 states and 1853 transitions.
[2023-04-01 10:20:49,994 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 186
[2023-04-01 10:20:49,995 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 10:20:49,996 INFO  L195           NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-04-01 10:20:50,011 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-04-01 10:20:50,196 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:20:50,197 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 10:20:50,197 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 10:20:50,197 INFO  L85        PathProgramCache]: Analyzing trace with hash -1897774087, now seen corresponding path program 1 times
[2023-04-01 10:20:50,197 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 10:20:50,198 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67372417]
[2023-04-01 10:20:50,198 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:20:50,198 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 10:20:50,277 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:20:50,518 INFO  L134       CoverageAnalysis]: Checked inductivity of 167 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked.
[2023-04-01 10:20:50,518 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 10:20:50,518 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67372417]
[2023-04-01 10:20:50,518 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67372417] provided 0 perfect and 1 imperfect interpolant sequences
[2023-04-01 10:20:50,520 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115686536]
[2023-04-01 10:20:50,521 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 10:20:50,521 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-04-01 10:20:50,521 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 10:20:50,522 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)
[2023-04-01 10:20:50,539 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-04-01 10:20:50,657 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 10:20:50,660 INFO  L262         TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 4 conjunts are in the unsatisfiable core
[2023-04-01 10:20:50,663 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-04-01 10:20:50,746 INFO  L134       CoverageAnalysis]: Checked inductivity of 167 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2023-04-01 10:20:50,746 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-04-01 10:20:50,929 INFO  L134       CoverageAnalysis]: Checked inductivity of 167 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked.
[2023-04-01 10:20:50,929 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115686536] provided 0 perfect and 2 imperfect interpolant sequences
[2023-04-01 10:20:50,929 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1319305832]
[2023-04-01 10:20:50,971 INFO  L159        IcfgInterpreter]: Started Sifa with 77 locations of interest
[2023-04-01 10:20:50,971 INFO  L166        IcfgInterpreter]: Building call graph
[2023-04-01 10:20:50,974 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2023-04-01 10:20:50,978 INFO  L176        IcfgInterpreter]: Starting interpretation
[2023-04-01 10:20:50,979 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2023-04-01 10:20:51,199 INFO  L197        IcfgInterpreter]: Interpreting procedure main with input of size 78 for LOIs
[2023-04-01 10:20:51,403 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 18
[2023-04-01 10:20:54,779 WARN  L137   XnfTransformerHelper]: expecting exponential blowup for input size 43
[2023-04-01 10:21:19,151 WARN  L176   XnfTransformerHelper]: Simplifying disjunction of 645624 conjuctions. This might take some time...