/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-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c


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


This is Ultimate 0.2.3-dev-f954360
[2023-04-01 00:43:19,533 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2023-04-01 00:43:19,590 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
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[2023-04-01 00:43:19,627 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-04-01 00:43:19,628 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-04-01 00:43:19,631 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 00:43:19,661 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-04-01 00:43:19,662 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-04-01 00:43:19,662 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-04-01 00:43:19,663 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-04-01 00:43:19,663 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-04-01 00:43:19,664 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-04-01 00:43:19,664 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2023-04-01 00:43:19,664 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-04-01 00:43:19,664 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2023-04-01 00:43:19,664 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-04-01 00:43:19,665 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2023-04-01 00:43:19,665 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-04-01 00:43:19,665 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-04-01 00:43:19,666 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-04-01 00:43:19,666 INFO  L138        SettingsManager]:  * Interval Domain=false
[2023-04-01 00:43:19,666 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-04-01 00:43:19,666 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-04-01 00:43:19,666 INFO  L138        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-04-01 00:43:19,667 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-04-01 00:43:19,667 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-04-01 00:43:19,667 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-04-01 00:43:19,667 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-04-01 00:43:19,667 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-04-01 00:43:19,667 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-04-01 00:43:19,668 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-04-01 00:43:19,668 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-04-01 00:43:19,668 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-04-01 00:43:19,668 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-04-01 00:43:19,668 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-04-01 00:43:19,668 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-04-01 00:43:19,669 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-04-01 00:43:19,669 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-04-01 00:43:19,669 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 00:43:19,669 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-04-01 00:43:19,669 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2023-04-01 00:43:19,669 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-04-01 00:43:19,670 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-04-01 00:43:19,670 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-04-01 00:43:19,670 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-04-01 00:43:19,670 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-04-01 00:43:19,670 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-04-01 00:43:19,670 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain
[2023-04-01 00:43:19,920 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-04-01 00:43:19,948 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-04-01 00:43:19,950 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-04-01 00:43:19,951 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-04-01 00:43:19,952 INFO  L275        PluginConnector]: CDTParser initialized
[2023-04-01 00:43:19,953 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c
[2023-04-01 00:43:21,171 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-04-01 00:43:21,706 INFO  L351              CDTParser]: Found 1 translation units.
[2023-04-01 00:43:21,707 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c
[2023-04-01 00:43:21,766 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ffed63f8/1115d7e1753647098f5adfd8894bb3fc/FLAGc937b1451
[2023-04-01 00:43:21,783 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ffed63f8/1115d7e1753647098f5adfd8894bb3fc
[2023-04-01 00:43:21,786 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-04-01 00:43:21,788 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-04-01 00:43:21,791 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-04-01 00:43:21,791 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-04-01 00:43:21,799 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-04-01 00:43:21,800 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:43:21" (1/1) ...
[2023-04-01 00:43:21,801 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c1c0eec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:21, skipping insertion in model container
[2023-04-01 00:43:21,802 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:43:21" (1/1) ...
[2023-04-01 00:43:21,808 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-04-01 00:43:22,206 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-04-01 00:43:22,927 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-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[40692,40705]
[2023-04-01 00:43:25,188 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 00:43:25,209 INFO  L203         MainTranslator]: Completed pre-run
[2023-04-01 00:43:25,434 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-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[40692,40705]
[2023-04-01 00:43:27,301 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-04-01 00:43:27,331 INFO  L208         MainTranslator]: Completed translation
[2023-04-01 00:43:27,332 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:27 WrapperNode
[2023-04-01 00:43:27,332 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-04-01 00:43:27,333 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-04-01 00:43:27,333 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-04-01 00:43:27,333 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-04-01 00:43:27,354 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:27" (1/1) ...
[2023-04-01 00:43:27,354 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:27" (1/1) ...
[2023-04-01 00:43:27,441 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:27" (1/1) ...
[2023-04-01 00:43:27,442 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:27" (1/1) ...
[2023-04-01 00:43:27,586 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:27" (1/1) ...
[2023-04-01 00:43:27,673 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:27" (1/1) ...
[2023-04-01 00:43:27,751 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:27" (1/1) ...
[2023-04-01 00:43:27,786 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:27" (1/1) ...
[2023-04-01 00:43:27,858 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-04-01 00:43:27,859 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-04-01 00:43:27,860 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-04-01 00:43:27,860 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-04-01 00:43:27,861 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:27" (1/1) ...
[2023-04-01 00:43:27,868 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-04-01 00:43:27,877 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-04-01 00:43:27,890 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 00:43:27,897 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 00:43:27,935 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-04-01 00:43:27,935 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-04-01 00:43:27,935 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-04-01 00:43:27,935 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2023-04-01 00:43:27,935 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-04-01 00:43:27,935 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-04-01 00:43:27,935 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-04-01 00:43:27,935 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-04-01 00:43:27,936 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-04-01 00:43:27,936 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2023-04-01 00:43:27,936 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2023-04-01 00:43:27,936 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2023-04-01 00:43:27,936 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2023-04-01 00:43:27,936 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2023-04-01 00:43:27,936 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2023-04-01 00:43:27,936 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2023-04-01 00:43:27,937 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2023-04-01 00:43:27,937 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2023-04-01 00:43:27,937 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2023-04-01 00:43:27,937 INFO  L130     BoogieDeclarations]: Found specification of procedure node5
[2023-04-01 00:43:27,937 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2023-04-01 00:43:27,937 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2023-04-01 00:43:27,937 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-04-01 00:43:27,937 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-04-01 00:43:27,937 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-04-01 00:43:27,937 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-04-01 00:43:27,938 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-04-01 00:43:27,938 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-04-01 00:43:27,938 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-04-01 00:43:28,326 INFO  L236             CfgBuilder]: Building ICFG
[2023-04-01 00:43:28,328 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-04-01 00:43:37,620 INFO  L277             CfgBuilder]: Performing block encoding
[2023-04-01 00:43:51,011 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-04-01 00:43:51,012 INFO  L302             CfgBuilder]: Removed 0 assume(true) statements.
[2023-04-01 00:43:51,019 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:43:51 BoogieIcfgContainer
[2023-04-01 00:43:51,019 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-04-01 00:43:51,021 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-04-01 00:43:51,022 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-04-01 00:43:51,024 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-04-01 00:43:51,024 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:43:21" (1/3) ...
[2023-04-01 00:43:51,025 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bfa50b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:43:51, skipping insertion in model container
[2023-04-01 00:43:51,025 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:43:27" (2/3) ...
[2023-04-01 00:43:51,025 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bfa50b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:43:51, skipping insertion in model container
[2023-04-01 00:43:51,025 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:43:51" (3/3) ...
[2023-04-01 00:43:51,026 INFO  L112   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c
[2023-04-01 00:43:51,044 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-04-01 00:43:51,045 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-04-01 00:43:51,170 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-04-01 00:43:51,176 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;@6c6a8ddf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-04-01 00:43:51,176 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-04-01 00:43:51,196 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 5239 states, 5217 states have (on average 1.7040444700019168) internal successors, (8890), 5234 states have internal predecessors, (8890), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-04-01 00:43:51,245 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 295
[2023-04-01 00:43:51,246 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:43:51,247 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:43:51,248 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:43:51,254 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:43:51,254 INFO  L85        PathProgramCache]: Analyzing trace with hash 508398973, now seen corresponding path program 1 times
[2023-04-01 00:43:51,262 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:43:51,262 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177620660]
[2023-04-01 00:43:51,264 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:43:51,264 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:43:51,766 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:43:52,198 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 00:43:52,199 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:43:52,199 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177620660]
[2023-04-01 00:43:52,200 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177620660] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 00:43:52,200 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 00:43:52,200 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 00:43:52,201 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750456590]
[2023-04-01 00:43:52,202 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 00:43:52,206 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 00:43:52,206 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 00:43:52,227 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 00:43:52,228 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 00:43:52,244 INFO  L87              Difference]: Start difference. First operand  has 5239 states, 5217 states have (on average 1.7040444700019168) internal successors, (8890), 5234 states have internal predecessors, (8890), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand  has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:43:53,520 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 00:43:53,521 INFO  L93              Difference]: Finished difference Result 10256 states and 17207 transitions.
[2023-04-01 00:43:53,522 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 00:43:53,524 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 294
[2023-04-01 00:43:53,525 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 00:43:53,561 INFO  L225             Difference]: With dead ends: 10256
[2023-04-01 00:43:53,561 INFO  L226             Difference]: Without dead ends: 6124
[2023-04-01 00:43:53,576 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 00:43:53,579 INFO  L413           NwaCegarLoop]: 9449 mSDtfsCounter, 5779 mSDsluCounter, 4388 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5779 SdHoareTripleChecker+Valid, 13837 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-04-01 00:43:53,580 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [5779 Valid, 13837 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-04-01 00:43:53,604 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6124 states.
[2023-04-01 00:43:54,128 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6124 to 6122.
[2023-04-01 00:43:54,146 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 6122 states, 6118 states have (on average 1.5993788819875776) internal successors, (9785), 6118 states have internal predecessors, (9785), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:43:54,172 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6122 states to 6122 states and 9788 transitions.
[2023-04-01 00:43:54,174 INFO  L78                 Accepts]: Start accepts. Automaton has 6122 states and 9788 transitions. Word has length 294
[2023-04-01 00:43:54,177 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 00:43:54,177 INFO  L495      AbstractCegarLoop]: Abstraction has 6122 states and 9788 transitions.
[2023-04-01 00:43:54,178 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:43:54,178 INFO  L276                IsEmpty]: Start isEmpty. Operand 6122 states and 9788 transitions.
[2023-04-01 00:43:54,195 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 305
[2023-04-01 00:43:54,196 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:43:54,196 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:43:54,196 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-04-01 00:43:54,197 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:43:54,198 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:43:54,198 INFO  L85        PathProgramCache]: Analyzing trace with hash 1772279860, now seen corresponding path program 1 times
[2023-04-01 00:43:54,199 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:43:54,199 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885527141]
[2023-04-01 00:43:54,199 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:43:54,199 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:43:54,331 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:43:54,592 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 00:43:54,593 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:43:54,593 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885527141]
[2023-04-01 00:43:54,593 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885527141] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 00:43:54,593 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 00:43:54,594 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 00:43:54,594 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204887160]
[2023-04-01 00:43:54,594 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 00:43:54,596 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 00:43:54,596 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 00:43:54,597 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 00:43:54,597 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 00:43:54,597 INFO  L87              Difference]: Start difference. First operand 6122 states and 9788 transitions. Second operand  has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:43:55,901 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 00:43:55,902 INFO  L93              Difference]: Finished difference Result 13302 states and 21385 transitions.
[2023-04-01 00:43:55,903 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 00:43:55,906 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 304
[2023-04-01 00:43:55,908 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 00:43:55,952 INFO  L225             Difference]: With dead ends: 13302
[2023-04-01 00:43:55,953 INFO  L226             Difference]: Without dead ends: 8026
[2023-04-01 00:43:55,974 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 00:43:55,976 INFO  L413           NwaCegarLoop]: 6991 mSDtfsCounter, 5606 mSDsluCounter, 3548 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5606 SdHoareTripleChecker+Valid, 10539 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-04-01 00:43:55,976 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [5606 Valid, 10539 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-04-01 00:43:55,990 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8026 states.
[2023-04-01 00:43:56,479 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8026 to 8024.
[2023-04-01 00:43:56,497 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 8024 states, 8020 states have (on average 1.6062344139650873) internal successors, (12882), 8020 states have internal predecessors, (12882), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:43:56,526 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8024 states to 8024 states and 12885 transitions.
[2023-04-01 00:43:56,527 INFO  L78                 Accepts]: Start accepts. Automaton has 8024 states and 12885 transitions. Word has length 304
[2023-04-01 00:43:56,527 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 00:43:56,527 INFO  L495      AbstractCegarLoop]: Abstraction has 8024 states and 12885 transitions.
[2023-04-01 00:43:56,528 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:43:56,528 INFO  L276                IsEmpty]: Start isEmpty. Operand 8024 states and 12885 transitions.
[2023-04-01 00:43:56,548 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 315
[2023-04-01 00:43:56,548 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:43:56,548 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:43:56,549 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-04-01 00:43:56,549 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:43:56,549 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:43:56,550 INFO  L85        PathProgramCache]: Analyzing trace with hash 1264064948, now seen corresponding path program 1 times
[2023-04-01 00:43:56,550 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:43:56,550 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333601946]
[2023-04-01 00:43:56,550 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:43:56,550 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:43:56,688 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:43:56,955 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 00:43:56,955 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:43:56,956 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333601946]
[2023-04-01 00:43:56,956 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333601946] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 00:43:56,956 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 00:43:56,956 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 00:43:56,957 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792063693]
[2023-04-01 00:43:56,957 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 00:43:56,957 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 00:43:56,958 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 00:43:56,958 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 00:43:56,959 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 00:43:56,971 INFO  L87              Difference]: Start difference. First operand 8024 states and 12885 transitions. Second operand  has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:43:58,603 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 00:43:58,604 INFO  L93              Difference]: Finished difference Result 18404 states and 29546 transitions.
[2023-04-01 00:43:58,604 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 00:43:58,606 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 314
[2023-04-01 00:43:58,606 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 00:43:58,664 INFO  L225             Difference]: With dead ends: 18404
[2023-04-01 00:43:58,664 INFO  L226             Difference]: Without dead ends: 11089
[2023-04-01 00:43:58,685 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 00:43:58,688 INFO  L413           NwaCegarLoop]: 6553 mSDtfsCounter, 5563 mSDsluCounter, 3333 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5563 SdHoareTripleChecker+Valid, 9886 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time
[2023-04-01 00:43:58,690 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [5563 Valid, 9886 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time]
[2023-04-01 00:43:58,703 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11089 states.
[2023-04-01 00:43:59,464 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11089 to 11087.
[2023-04-01 00:43:59,484 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 11087 states, 11083 states have (on average 1.6007398718758459) internal successors, (17741), 11083 states have internal predecessors, (17741), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:43:59,516 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11087 states to 11087 states and 17744 transitions.
[2023-04-01 00:43:59,516 INFO  L78                 Accepts]: Start accepts. Automaton has 11087 states and 17744 transitions. Word has length 314
[2023-04-01 00:43:59,517 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 00:43:59,517 INFO  L495      AbstractCegarLoop]: Abstraction has 11087 states and 17744 transitions.
[2023-04-01 00:43:59,517 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:43:59,517 INFO  L276                IsEmpty]: Start isEmpty. Operand 11087 states and 17744 transitions.
[2023-04-01 00:43:59,537 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 325
[2023-04-01 00:43:59,537 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:43:59,537 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:43:59,537 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2023-04-01 00:43:59,538 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:43:59,538 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:43:59,539 INFO  L85        PathProgramCache]: Analyzing trace with hash -399216625, now seen corresponding path program 1 times
[2023-04-01 00:43:59,539 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:43:59,539 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572759037]
[2023-04-01 00:43:59,539 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:43:59,539 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:43:59,658 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:43:59,882 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 00:43:59,882 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:43:59,882 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572759037]
[2023-04-01 00:43:59,882 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572759037] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 00:43:59,883 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 00:43:59,883 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 00:43:59,883 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77893722]
[2023-04-01 00:43:59,883 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 00:43:59,883 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 00:43:59,884 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 00:43:59,884 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 00:43:59,884 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 00:43:59,885 INFO  L87              Difference]: Start difference. First operand 11087 states and 17744 transitions. Second operand  has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:44:01,859 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 00:44:01,860 INFO  L93              Difference]: Finished difference Result 26175 states and 41733 transitions.
[2023-04-01 00:44:01,860 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 00:44:01,861 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 324
[2023-04-01 00:44:01,861 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 00:44:01,907 INFO  L225             Difference]: With dead ends: 26175
[2023-04-01 00:44:01,908 INFO  L226             Difference]: Without dead ends: 15742
[2023-04-01 00:44:01,934 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 00:44:01,939 INFO  L413           NwaCegarLoop]: 7131 mSDtfsCounter, 5434 mSDsluCounter, 3248 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5434 SdHoareTripleChecker+Valid, 10379 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time
[2023-04-01 00:44:01,940 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [5434 Valid, 10379 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time]
[2023-04-01 00:44:01,960 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15742 states.
[2023-04-01 00:44:03,222 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15742 to 15740.
[2023-04-01 00:44:03,253 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 15740 states, 15736 states have (on average 1.5849008642602949) internal successors, (24940), 15736 states have internal predecessors, (24940), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:44:03,300 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15740 states to 15740 states and 24943 transitions.
[2023-04-01 00:44:03,300 INFO  L78                 Accepts]: Start accepts. Automaton has 15740 states and 24943 transitions. Word has length 324
[2023-04-01 00:44:03,301 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-04-01 00:44:03,301 INFO  L495      AbstractCegarLoop]: Abstraction has 15740 states and 24943 transitions.
[2023-04-01 00:44:03,301 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:44:03,301 INFO  L276                IsEmpty]: Start isEmpty. Operand 15740 states and 24943 transitions.
[2023-04-01 00:44:03,329 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 335
[2023-04-01 00:44:03,329 INFO  L187           NwaCegarLoop]: Found error trace
[2023-04-01 00:44:03,329 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:44:03,330 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2023-04-01 00:44:03,330 INFO  L420      AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-04-01 00:44:03,330 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-04-01 00:44:03,330 INFO  L85        PathProgramCache]: Analyzing trace with hash 2144848604, now seen corresponding path program 1 times
[2023-04-01 00:44:03,331 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-04-01 00:44:03,331 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844245446]
[2023-04-01 00:44:03,331 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-04-01 00:44:03,331 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-04-01 00:44:03,435 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-04-01 00:44:03,719 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 00:44:03,720 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-04-01 00:44:03,720 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844245446]
[2023-04-01 00:44:03,720 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844245446] provided 1 perfect and 0 imperfect interpolant sequences
[2023-04-01 00:44:03,720 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-04-01 00:44:03,720 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2023-04-01 00:44:03,720 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948158209]
[2023-04-01 00:44:03,721 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-04-01 00:44:03,721 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2023-04-01 00:44:03,721 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-04-01 00:44:03,723 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2023-04-01 00:44:03,725 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 00:44:03,726 INFO  L87              Difference]: Start difference. First operand 15740 states and 24943 transitions. Second operand  has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-04-01 00:44:06,121 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-04-01 00:44:06,121 INFO  L93              Difference]: Finished difference Result 37908 states and 59780 transitions.
[2023-04-01 00:44:06,122 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2023-04-01 00:44:06,123 INFO  L78                 Accepts]: Start accepts. Automaton has  has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 334
[2023-04-01 00:44:06,123 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-04-01 00:44:06,189 INFO  L225             Difference]: With dead ends: 37908
[2023-04-01 00:44:06,189 INFO  L226             Difference]: Without dead ends: 22808
[2023-04-01 00:44:06,226 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2023-04-01 00:44:06,227 INFO  L413           NwaCegarLoop]: 8345 mSDtfsCounter, 5399 mSDsluCounter, 3248 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5399 SdHoareTripleChecker+Valid, 11593 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time
[2023-04-01 00:44:06,227 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [5399 Valid, 11593 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time]
[2023-04-01 00:44:06,254 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 22808 states.