/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 10:10:42,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 10:10:42,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 10:10:42,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 10:10:42,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 10:10:42,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 10:10:42,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 10:10:42,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 10:10:42,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 10:10:42,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 10:10:42,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 10:10:42,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 10:10:42,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 10:10:42,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 10:10:42,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 10:10:42,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 10:10:42,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 10:10:42,662 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 10:10:42,663 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 10:10:42,664 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 10:10:42,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 10:10:42,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 10:10:42,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 10:10:42,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 10:10:42,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 10:10:42,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 10:10:42,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 10:10:42,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 10:10:42,668 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 10:10:42,698 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 10:10:42,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 10:10:42,699 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 10:10:42,699 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 10:10:42,700 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 10:10:42,700 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 10:10:42,700 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 10:10:42,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 10:10:42,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 10:10:42,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 10:10:42,701 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 10:10:42,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 10:10:42,701 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 10:10:42,701 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 10:10:42,701 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 10:10:42,701 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 10:10:42,701 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 10:10:42,702 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 10:10:42,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 10:10:42,702 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 10:10:42,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 10:10:42,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 10:10:42,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 10:10:42,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 10:10:42,702 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 10:10:42,702 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 10:10:42,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 10:10:42,703 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 10:10:42,703 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 10:10:42,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 10:10:42,703 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 10:10:42,703 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 10:10:42,703 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 10:10:42,704 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 10:10:42,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 10:10:42,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 10:10:42,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 10:10:42,921 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 10:10:42,921 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 10:10:42,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label26.c [2022-01-10 10:10:42,972 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3a267dcb/283ea677a67245ab87fc6dc09e57f8e9/FLAGab9b85a99 [2022-01-10 10:10:43,401 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 10:10:43,402 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label26.c [2022-01-10 10:10:43,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3a267dcb/283ea677a67245ab87fc6dc09e57f8e9/FLAGab9b85a99 [2022-01-10 10:10:43,729 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3a267dcb/283ea677a67245ab87fc6dc09e57f8e9 [2022-01-10 10:10:43,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 10:10:43,735 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 10:10:43,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 10:10:43,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 10:10:43,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 10:10:43,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 10:10:43" (1/1) ... [2022-01-10 10:10:43,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ba07fcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:43, skipping insertion in model container [2022-01-10 10:10:43,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 10:10:43" (1/1) ... [2022-01-10 10:10:43,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 10:10:43,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 10:10:44,314 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label26.c[55276,55289] [2022-01-10 10:10:44,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 10:10:44,355 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 10:10:44,496 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label26.c[55276,55289] [2022-01-10 10:10:44,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 10:10:44,521 INFO L208 MainTranslator]: Completed translation [2022-01-10 10:10:44,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:44 WrapperNode [2022-01-10 10:10:44,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 10:10:44,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 10:10:44,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 10:10:44,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 10:10:44,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:44" (1/1) ... [2022-01-10 10:10:44,567 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:44" (1/1) ... [2022-01-10 10:10:44,713 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2022-01-10 10:10:44,714 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 10:10:44,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 10:10:44,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 10:10:44,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 10:10:44,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:44" (1/1) ... [2022-01-10 10:10:44,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:44" (1/1) ... [2022-01-10 10:10:44,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:44" (1/1) ... [2022-01-10 10:10:44,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:44" (1/1) ... [2022-01-10 10:10:44,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:44" (1/1) ... [2022-01-10 10:10:44,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:44" (1/1) ... [2022-01-10 10:10:44,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:44" (1/1) ... [2022-01-10 10:10:44,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 10:10:44,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 10:10:44,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 10:10:44,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 10:10:44,900 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:44" (1/1) ... [2022-01-10 10:10:44,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 10:10:44,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 10:10:44,956 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) [2022-01-10 10:10:44,972 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 [2022-01-10 10:10:44,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 10:10:44,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 10:10:44,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 10:10:44,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 10:10:45,066 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 10:10:45,067 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 10:10:46,386 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 10:10:46,398 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 10:10:46,398 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 10:10:46,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 10:10:46 BoogieIcfgContainer [2022-01-10 10:10:46,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 10:10:46,401 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 10:10:46,401 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 10:10:46,402 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 10:10:46,404 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 10:10:46" (1/1) ... [2022-01-10 10:10:46,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 10:10:46 BasicIcfg [2022-01-10 10:10:46,758 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 10:10:46,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 10:10:46,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 10:10:46,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 10:10:46,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 10:10:43" (1/4) ... [2022-01-10 10:10:46,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56428c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 10:10:46, skipping insertion in model container [2022-01-10 10:10:46,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 10:10:44" (2/4) ... [2022-01-10 10:10:46,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56428c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 10:10:46, skipping insertion in model container [2022-01-10 10:10:46,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 10:10:46" (3/4) ... [2022-01-10 10:10:46,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56428c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 10:10:46, skipping insertion in model container [2022-01-10 10:10:46,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 10:10:46" (4/4) ... [2022-01-10 10:10:46,766 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label26.cTransformedIcfg [2022-01-10 10:10:46,771 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 10:10:46,771 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 10:10:46,815 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 10:10:46,824 INFO L339 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=PETRI_NET, 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 10:10:46,824 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 10:10:46,845 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:46,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-10 10:10:46,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:46,860 INFO L514 BasicCegarLoop]: 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] [2022-01-10 10:10:46,860 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:46,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:46,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1295552838, now seen corresponding path program 1 times [2022-01-10 10:10:46,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:46,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379498948] [2022-01-10 10:10:46,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:46,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 10:10:47,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:47,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379498948] [2022-01-10 10:10:47,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379498948] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:47,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:47,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:10:47,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993609073] [2022-01-10 10:10:47,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:47,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:47,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:47,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:47,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:47,632 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:48,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:48,887 INFO L93 Difference]: Finished difference Result 860 states and 1507 transitions. [2022-01-10 10:10:48,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:48,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2022-01-10 10:10:48,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:48,908 INFO L225 Difference]: With dead ends: 860 [2022-01-10 10:10:48,909 INFO L226 Difference]: Without dead ends: 465 [2022-01-10 10:10:48,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:48,917 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 148 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:48,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 169 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 10:10:48,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-01-10 10:10:48,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 459. [2022-01-10 10:10:48,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.556768558951965) internal successors, (713), 458 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:48,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 713 transitions. [2022-01-10 10:10:48,968 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 713 transitions. Word has length 156 [2022-01-10 10:10:48,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:48,969 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 713 transitions. [2022-01-10 10:10:48,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:48,969 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 713 transitions. [2022-01-10 10:10:48,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-10 10:10:48,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:48,973 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:48,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 10:10:48,973 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:48,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:48,974 INFO L85 PathProgramCache]: Analyzing trace with hash 156817310, now seen corresponding path program 1 times [2022-01-10 10:10:48,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:48,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599403381] [2022-01-10 10:10:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:48,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 10:10:49,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:49,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599403381] [2022-01-10 10:10:49,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599403381] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:49,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:49,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:10:49,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573909510] [2022-01-10 10:10:49,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:49,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:49,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:49,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:49,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:49,113 INFO L87 Difference]: Start difference. First operand 459 states and 713 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:50,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:50,072 INFO L93 Difference]: Finished difference Result 1343 states and 2102 transitions. [2022-01-10 10:10:50,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:50,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2022-01-10 10:10:50,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:50,076 INFO L225 Difference]: With dead ends: 1343 [2022-01-10 10:10:50,076 INFO L226 Difference]: Without dead ends: 886 [2022-01-10 10:10:50,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:50,078 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:50,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 93 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:10:50,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-01-10 10:10:50,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 868. [2022-01-10 10:10:50,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 1.532871972318339) internal successors, (1329), 867 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:50,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1329 transitions. [2022-01-10 10:10:50,102 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1329 transitions. Word has length 164 [2022-01-10 10:10:50,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:50,103 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1329 transitions. [2022-01-10 10:10:50,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:50,108 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1329 transitions. [2022-01-10 10:10:50,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-10 10:10:50,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:50,114 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:50,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 10:10:50,114 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:50,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:50,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1719906340, now seen corresponding path program 1 times [2022-01-10 10:10:50,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:50,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859268536] [2022-01-10 10:10:50,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:50,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:50,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 10:10:50,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:50,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859268536] [2022-01-10 10:10:50,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859268536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:50,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:50,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:10:50,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490018210] [2022-01-10 10:10:50,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:50,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:50,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:50,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:50,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:50,274 INFO L87 Difference]: Start difference. First operand 868 states and 1329 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:50,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:50,718 INFO L93 Difference]: Finished difference Result 1710 states and 2622 transitions. [2022-01-10 10:10:50,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:50,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2022-01-10 10:10:50,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:50,722 INFO L225 Difference]: With dead ends: 1710 [2022-01-10 10:10:50,722 INFO L226 Difference]: Without dead ends: 844 [2022-01-10 10:10:50,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:50,725 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 329 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:50,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 10:10:50,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2022-01-10 10:10:50,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2022-01-10 10:10:50,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 1.4768683274021353) internal successors, (1245), 843 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:50,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1245 transitions. [2022-01-10 10:10:50,740 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1245 transitions. Word has length 169 [2022-01-10 10:10:50,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:50,741 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1245 transitions. [2022-01-10 10:10:50,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:50,741 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1245 transitions. [2022-01-10 10:10:50,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-10 10:10:50,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:50,744 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:50,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 10:10:50,744 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:50,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:50,745 INFO L85 PathProgramCache]: Analyzing trace with hash -980057602, now seen corresponding path program 1 times [2022-01-10 10:10:50,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:50,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561000256] [2022-01-10 10:10:50,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:50,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 10:10:50,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:50,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561000256] [2022-01-10 10:10:50,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561000256] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:50,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:50,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:10:50,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102248390] [2022-01-10 10:10:50,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:50,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:50,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:50,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:50,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:50,851 INFO L87 Difference]: Start difference. First operand 844 states and 1245 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:51,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:51,642 INFO L93 Difference]: Finished difference Result 2517 states and 3716 transitions. [2022-01-10 10:10:51,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:51,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2022-01-10 10:10:51,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:51,647 INFO L225 Difference]: With dead ends: 2517 [2022-01-10 10:10:51,647 INFO L226 Difference]: Without dead ends: 1675 [2022-01-10 10:10:51,650 INFO L932 BasicCegarLoop]: 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 [2022-01-10 10:10:51,655 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 243 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:51,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 93 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 10:10:51,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2022-01-10 10:10:51,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1672. [2022-01-10 10:10:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 1.4111310592459605) internal successors, (2358), 1671 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:51,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2358 transitions. [2022-01-10 10:10:51,682 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2358 transitions. Word has length 170 [2022-01-10 10:10:51,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:51,682 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 2358 transitions. [2022-01-10 10:10:51,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:51,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2358 transitions. [2022-01-10 10:10:51,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-10 10:10:51,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:51,685 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:51,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 10:10:51,685 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:51,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:51,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1964985278, now seen corresponding path program 1 times [2022-01-10 10:10:51,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:51,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714928540] [2022-01-10 10:10:51,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:51,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 10:10:51,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:51,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714928540] [2022-01-10 10:10:51,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714928540] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:51,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:51,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:10:51,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628460639] [2022-01-10 10:10:51,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:51,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:51,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:51,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:51,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:51,777 INFO L87 Difference]: Start difference. First operand 1672 states and 2358 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:52,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:52,546 INFO L93 Difference]: Finished difference Result 4174 states and 5865 transitions. [2022-01-10 10:10:52,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:52,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2022-01-10 10:10:52,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:52,553 INFO L225 Difference]: With dead ends: 4174 [2022-01-10 10:10:52,554 INFO L226 Difference]: Without dead ends: 2504 [2022-01-10 10:10:52,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:52,556 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 227 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:52,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 68 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 10:10:52,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2022-01-10 10:10:52,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2503. [2022-01-10 10:10:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2503 states, 2502 states have (on average 1.3920863309352518) internal successors, (3483), 2502 states have internal predecessors, (3483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 3483 transitions. [2022-01-10 10:10:52,605 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 3483 transitions. Word has length 171 [2022-01-10 10:10:52,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:52,607 INFO L470 AbstractCegarLoop]: Abstraction has 2503 states and 3483 transitions. [2022-01-10 10:10:52,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:52,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 3483 transitions. [2022-01-10 10:10:52,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-10 10:10:52,616 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:52,616 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:52,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 10:10:52,617 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:52,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:52,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1967929112, now seen corresponding path program 1 times [2022-01-10 10:10:52,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:52,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391625806] [2022-01-10 10:10:52,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:52,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 10:10:52,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:52,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391625806] [2022-01-10 10:10:52,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391625806] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:52,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:52,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:52,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659832413] [2022-01-10 10:10:52,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:52,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:52,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:52,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:52,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:52,704 INFO L87 Difference]: Start difference. First operand 2503 states and 3483 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:53,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:53,100 INFO L93 Difference]: Finished difference Result 7478 states and 10407 transitions. [2022-01-10 10:10:53,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:53,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2022-01-10 10:10:53,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:53,114 INFO L225 Difference]: With dead ends: 7478 [2022-01-10 10:10:53,115 INFO L226 Difference]: Without dead ends: 4977 [2022-01-10 10:10:53,118 INFO L932 BasicCegarLoop]: 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 [2022-01-10 10:10:53,120 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 325 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:53,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 494 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 10:10:53,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2022-01-10 10:10:53,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 4975. [2022-01-10 10:10:53,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4975 states, 4974 states have (on average 1.3886208283071975) internal successors, (6907), 4974 states have internal predecessors, (6907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:53,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4975 states to 4975 states and 6907 transitions. [2022-01-10 10:10:53,196 INFO L78 Accepts]: Start accepts. Automaton has 4975 states and 6907 transitions. Word has length 176 [2022-01-10 10:10:53,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:53,196 INFO L470 AbstractCegarLoop]: Abstraction has 4975 states and 6907 transitions. [2022-01-10 10:10:53,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:53,197 INFO L276 IsEmpty]: Start isEmpty. Operand 4975 states and 6907 transitions. [2022-01-10 10:10:53,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 10:10:53,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:53,201 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:53,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 10:10:53,201 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:53,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:53,202 INFO L85 PathProgramCache]: Analyzing trace with hash -432054186, now seen corresponding path program 1 times [2022-01-10 10:10:53,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:53,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414245565] [2022-01-10 10:10:53,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:53,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 10:10:53,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:53,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414245565] [2022-01-10 10:10:53,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414245565] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:53,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:53,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:53,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676077835] [2022-01-10 10:10:53,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:53,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:53,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:53,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:53,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:53,291 INFO L87 Difference]: Start difference. First operand 4975 states and 6907 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:54,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:54,317 INFO L93 Difference]: Finished difference Result 9930 states and 13780 transitions. [2022-01-10 10:10:54,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:54,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2022-01-10 10:10:54,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:54,331 INFO L225 Difference]: With dead ends: 9930 [2022-01-10 10:10:54,331 INFO L226 Difference]: Without dead ends: 4957 [2022-01-10 10:10:54,337 INFO L932 BasicCegarLoop]: 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 [2022-01-10 10:10:54,338 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 251 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:54,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 341 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 10:10:54,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4957 states. [2022-01-10 10:10:54,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4957 to 4955. [2022-01-10 10:10:54,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4955 states, 4954 states have (on average 1.28118691966088) internal successors, (6347), 4954 states have internal predecessors, (6347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:54,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4955 states to 4955 states and 6347 transitions. [2022-01-10 10:10:54,419 INFO L78 Accepts]: Start accepts. Automaton has 4955 states and 6347 transitions. Word has length 178 [2022-01-10 10:10:54,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:54,420 INFO L470 AbstractCegarLoop]: Abstraction has 4955 states and 6347 transitions. [2022-01-10 10:10:54,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:54,421 INFO L276 IsEmpty]: Start isEmpty. Operand 4955 states and 6347 transitions. [2022-01-10 10:10:54,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-10 10:10:54,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:54,426 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:54,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 10:10:54,426 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:54,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:54,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1977989528, now seen corresponding path program 1 times [2022-01-10 10:10:54,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:54,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870829346] [2022-01-10 10:10:54,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:54,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:54,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 10:10:54,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:54,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870829346] [2022-01-10 10:10:54,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870829346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:54,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:54,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:54,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044423927] [2022-01-10 10:10:54,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:54,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:54,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:54,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:54,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:54,545 INFO L87 Difference]: Start difference. First operand 4955 states and 6347 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:55,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:55,438 INFO L93 Difference]: Finished difference Result 14784 states and 18937 transitions. [2022-01-10 10:10:55,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:55,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2022-01-10 10:10:55,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:55,461 INFO L225 Difference]: With dead ends: 14784 [2022-01-10 10:10:55,461 INFO L226 Difference]: Without dead ends: 9831 [2022-01-10 10:10:55,468 INFO L932 BasicCegarLoop]: 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 [2022-01-10 10:10:55,468 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 211 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:55,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 376 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 10:10:55,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9831 states. [2022-01-10 10:10:55,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9831 to 9827. [2022-01-10 10:10:55,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9827 states, 9826 states have (on average 1.1806431915326685) internal successors, (11601), 9826 states have internal predecessors, (11601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:55,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9827 states to 9827 states and 11601 transitions. [2022-01-10 10:10:55,597 INFO L78 Accepts]: Start accepts. Automaton has 9827 states and 11601 transitions. Word has length 180 [2022-01-10 10:10:55,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:55,599 INFO L470 AbstractCegarLoop]: Abstraction has 9827 states and 11601 transitions. [2022-01-10 10:10:55,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:55,600 INFO L276 IsEmpty]: Start isEmpty. Operand 9827 states and 11601 transitions. [2022-01-10 10:10:55,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-10 10:10:55,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:55,608 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:55,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 10:10:55,608 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:55,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:55,608 INFO L85 PathProgramCache]: Analyzing trace with hash 328257250, now seen corresponding path program 1 times [2022-01-10 10:10:55,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:55,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741609358] [2022-01-10 10:10:55,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:55,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 10:10:55,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:55,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741609358] [2022-01-10 10:10:55,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741609358] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:55,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:55,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:10:55,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577217971] [2022-01-10 10:10:55,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:55,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:10:55,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:55,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:10:55,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:55,700 INFO L87 Difference]: Start difference. First operand 9827 states and 11601 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:56,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:56,626 INFO L93 Difference]: Finished difference Result 24528 states and 29445 transitions. [2022-01-10 10:10:56,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:10:56,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2022-01-10 10:10:56,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:56,652 INFO L225 Difference]: With dead ends: 24528 [2022-01-10 10:10:56,652 INFO L226 Difference]: Without dead ends: 14703 [2022-01-10 10:10:56,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:10:56,663 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 209 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:56,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 135 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 10:10:56,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14703 states. [2022-01-10 10:10:56,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14703 to 14699. [2022-01-10 10:10:56,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14699 states, 14698 states have (on average 1.1557354742141788) internal successors, (16987), 14698 states have internal predecessors, (16987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:56,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14699 states to 14699 states and 16987 transitions. [2022-01-10 10:10:56,836 INFO L78 Accepts]: Start accepts. Automaton has 14699 states and 16987 transitions. Word has length 190 [2022-01-10 10:10:56,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:56,836 INFO L470 AbstractCegarLoop]: Abstraction has 14699 states and 16987 transitions. [2022-01-10 10:10:56,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:56,837 INFO L276 IsEmpty]: Start isEmpty. Operand 14699 states and 16987 transitions. [2022-01-10 10:10:56,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-01-10 10:10:56,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:56,846 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:56,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 10:10:56,846 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:56,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:56,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1584742439, now seen corresponding path program 1 times [2022-01-10 10:10:56,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:56,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361804496] [2022-01-10 10:10:56,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:56,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:56,988 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 10:10:56,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:56,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361804496] [2022-01-10 10:10:56,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361804496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:56,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:56,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:56,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397693947] [2022-01-10 10:10:56,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:56,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:10:56,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:56,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:10:56,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:10:56,990 INFO L87 Difference]: Start difference. First operand 14699 states and 16987 transitions. Second operand has 4 states, 4 states have (on average 53.0) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:58,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:10:58,273 INFO L93 Difference]: Finished difference Result 53454 states and 62182 transitions. [2022-01-10 10:10:58,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:10:58,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 223 [2022-01-10 10:10:58,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:10:58,344 INFO L225 Difference]: With dead ends: 53454 [2022-01-10 10:10:58,344 INFO L226 Difference]: Without dead ends: 38757 [2022-01-10 10:10:58,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:10:58,361 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 503 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 10:10:58,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 292 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 10:10:58,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38757 states. [2022-01-10 10:10:58,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38757 to 38752. [2022-01-10 10:10:58,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38752 states, 38751 states have (on average 1.163969962065495) internal successors, (45105), 38751 states have internal predecessors, (45105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:58,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38752 states to 38752 states and 45105 transitions. [2022-01-10 10:10:58,871 INFO L78 Accepts]: Start accepts. Automaton has 38752 states and 45105 transitions. Word has length 223 [2022-01-10 10:10:58,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:10:58,871 INFO L470 AbstractCegarLoop]: Abstraction has 38752 states and 45105 transitions. [2022-01-10 10:10:58,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:10:58,872 INFO L276 IsEmpty]: Start isEmpty. Operand 38752 states and 45105 transitions. [2022-01-10 10:10:58,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-01-10 10:10:58,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:10:58,891 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:10:58,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 10:10:58,892 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:10:58,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:10:58,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1106818579, now seen corresponding path program 1 times [2022-01-10 10:10:58,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:10:58,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496124000] [2022-01-10 10:10:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:10:58,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:10:59,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:10:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-10 10:10:59,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:10:59,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496124000] [2022-01-10 10:10:59,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496124000] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:10:59,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:10:59,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:10:59,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921552453] [2022-01-10 10:10:59,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:10:59,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:10:59,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:10:59,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:10:59,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:10:59,052 INFO L87 Difference]: Start difference. First operand 38752 states and 45105 transitions. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:00,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:00,923 INFO L93 Difference]: Finished difference Result 119919 states and 139917 transitions. [2022-01-10 10:11:00,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:11:00,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2022-01-10 10:11:00,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:01,065 INFO L225 Difference]: With dead ends: 119919 [2022-01-10 10:11:01,065 INFO L226 Difference]: Without dead ends: 81169 [2022-01-10 10:11:01,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:11:01,110 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 492 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:01,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 481 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 10:11:01,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81169 states. [2022-01-10 10:11:02,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81169 to 81130. [2022-01-10 10:11:02,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81130 states, 81129 states have (on average 1.1624326689593116) internal successors, (94307), 81129 states have internal predecessors, (94307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:02,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81130 states to 81130 states and 94307 transitions. [2022-01-10 10:11:02,789 INFO L78 Accepts]: Start accepts. Automaton has 81130 states and 94307 transitions. Word has length 224 [2022-01-10 10:11:02,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:02,789 INFO L470 AbstractCegarLoop]: Abstraction has 81130 states and 94307 transitions. [2022-01-10 10:11:02,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:02,790 INFO L276 IsEmpty]: Start isEmpty. Operand 81130 states and 94307 transitions. [2022-01-10 10:11:02,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-01-10 10:11:02,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:02,836 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:11:02,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 10:11:02,836 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:02,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:02,836 INFO L85 PathProgramCache]: Analyzing trace with hash 175206702, now seen corresponding path program 1 times [2022-01-10 10:11:02,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:02,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912228904] [2022-01-10 10:11:02,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:02,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 10:11:03,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:03,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912228904] [2022-01-10 10:11:03,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912228904] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:03,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:03,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:11:03,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371664638] [2022-01-10 10:11:03,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:03,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:11:03,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:03,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:11:03,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:11:03,379 INFO L87 Difference]: Start difference. First operand 81130 states and 94307 transitions. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 2 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:05,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:05,069 INFO L93 Difference]: Finished difference Result 220584 states and 256815 transitions. [2022-01-10 10:11:05,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:11:05,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 2 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2022-01-10 10:11:05,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:05,310 INFO L225 Difference]: With dead ends: 220584 [2022-01-10 10:11:05,310 INFO L226 Difference]: Without dead ends: 139456 [2022-01-10 10:11:05,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:11:05,378 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 165 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:05,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 149 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:11:05,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139456 states. [2022-01-10 10:11:06,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139456 to 139439. [2022-01-10 10:11:07,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139439 states, 139438 states have (on average 1.1489048896283653) internal successors, (160201), 139438 states have internal predecessors, (160201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:07,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139439 states to 139439 states and 160201 transitions. [2022-01-10 10:11:07,571 INFO L78 Accepts]: Start accepts. Automaton has 139439 states and 160201 transitions. Word has length 234 [2022-01-10 10:11:07,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:07,571 INFO L470 AbstractCegarLoop]: Abstraction has 139439 states and 160201 transitions. [2022-01-10 10:11:07,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 2 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:07,572 INFO L276 IsEmpty]: Start isEmpty. Operand 139439 states and 160201 transitions. [2022-01-10 10:11:07,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-01-10 10:11:07,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:07,597 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:11:07,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 10:11:07,598 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:07,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:07,598 INFO L85 PathProgramCache]: Analyzing trace with hash 2106946172, now seen corresponding path program 1 times [2022-01-10 10:11:07,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:07,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750899370] [2022-01-10 10:11:07,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:07,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-01-10 10:11:07,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:07,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750899370] [2022-01-10 10:11:07,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750899370] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:07,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:07,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:11:07,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273856121] [2022-01-10 10:11:07,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:07,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:11:07,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:07,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:11:07,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:11:07,699 INFO L87 Difference]: Start difference. First operand 139439 states and 160201 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:09,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:09,878 INFO L93 Difference]: Finished difference Result 301221 states and 344801 transitions. [2022-01-10 10:11:09,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:11:09,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 247 [2022-01-10 10:11:09,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:10,174 INFO L225 Difference]: With dead ends: 301221 [2022-01-10 10:11:10,174 INFO L226 Difference]: Without dead ends: 161784 [2022-01-10 10:11:10,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:11:10,213 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 413 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:10,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 151 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 10:11:10,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161784 states. [2022-01-10 10:11:12,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161784 to 147762. [2022-01-10 10:11:12,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147762 states, 147761 states have (on average 1.1404362450172914) internal successors, (168512), 147761 states have internal predecessors, (168512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:12,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147762 states to 147762 states and 168512 transitions. [2022-01-10 10:11:12,492 INFO L78 Accepts]: Start accepts. Automaton has 147762 states and 168512 transitions. Word has length 247 [2022-01-10 10:11:12,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:12,492 INFO L470 AbstractCegarLoop]: Abstraction has 147762 states and 168512 transitions. [2022-01-10 10:11:12,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:12,492 INFO L276 IsEmpty]: Start isEmpty. Operand 147762 states and 168512 transitions. [2022-01-10 10:11:12,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-01-10 10:11:12,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:12,749 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:11:12,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 10:11:12,749 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:12,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:12,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1889663866, now seen corresponding path program 1 times [2022-01-10 10:11:12,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:12,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842934742] [2022-01-10 10:11:12,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:12,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 10:11:12,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:12,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842934742] [2022-01-10 10:11:12,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842934742] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:12,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:12,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:11:12,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802035615] [2022-01-10 10:11:12,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:12,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:11:12,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:12,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:11:12,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:11:12,980 INFO L87 Difference]: Start difference. First operand 147762 states and 168512 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:14,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:14,973 INFO L93 Difference]: Finished difference Result 318323 states and 363892 transitions. [2022-01-10 10:11:14,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:11:14,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2022-01-10 10:11:14,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:15,349 INFO L225 Difference]: With dead ends: 318323 [2022-01-10 10:11:15,350 INFO L226 Difference]: Without dead ends: 170563 [2022-01-10 10:11:15,454 INFO L932 BasicCegarLoop]: 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 [2022-01-10 10:11:15,455 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 141 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:15,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 351 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 10:11:15,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170563 states. [2022-01-10 10:11:17,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170563 to 170540. [2022-01-10 10:11:17,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170540 states, 170539 states have (on average 1.1348196013815022) internal successors, (193531), 170539 states have internal predecessors, (193531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:17,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170540 states to 170540 states and 193531 transitions. [2022-01-10 10:11:17,936 INFO L78 Accepts]: Start accepts. Automaton has 170540 states and 193531 transitions. Word has length 249 [2022-01-10 10:11:17,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:17,937 INFO L470 AbstractCegarLoop]: Abstraction has 170540 states and 193531 transitions. [2022-01-10 10:11:17,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:17,937 INFO L276 IsEmpty]: Start isEmpty. Operand 170540 states and 193531 transitions. [2022-01-10 10:11:17,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-01-10 10:11:17,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:17,956 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:11:17,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 10:11:17,957 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:17,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:17,957 INFO L85 PathProgramCache]: Analyzing trace with hash -398360483, now seen corresponding path program 1 times [2022-01-10 10:11:17,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:17,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602154206] [2022-01-10 10:11:17,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:17,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-01-10 10:11:18,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:18,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602154206] [2022-01-10 10:11:18,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602154206] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:18,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:18,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:11:18,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238286011] [2022-01-10 10:11:18,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:18,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:11:18,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:18,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:11:18,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:11:18,378 INFO L87 Difference]: Start difference. First operand 170540 states and 193531 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:20,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:20,411 INFO L93 Difference]: Finished difference Result 386059 states and 437535 transitions. [2022-01-10 10:11:20,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:11:20,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 262 [2022-01-10 10:11:20,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:20,814 INFO L225 Difference]: With dead ends: 386059 [2022-01-10 10:11:20,814 INFO L226 Difference]: Without dead ends: 215521 [2022-01-10 10:11:20,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:11:20,883 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 205 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:20,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 84 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 10:11:21,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215521 states. [2022-01-10 10:11:23,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215521 to 215516. [2022-01-10 10:11:23,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215516 states, 215515 states have (on average 1.1309978423775606) internal successors, (243747), 215515 states have internal predecessors, (243747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:23,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215516 states to 215516 states and 243747 transitions. [2022-01-10 10:11:23,920 INFO L78 Accepts]: Start accepts. Automaton has 215516 states and 243747 transitions. Word has length 262 [2022-01-10 10:11:23,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:23,921 INFO L470 AbstractCegarLoop]: Abstraction has 215516 states and 243747 transitions. [2022-01-10 10:11:23,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:23,921 INFO L276 IsEmpty]: Start isEmpty. Operand 215516 states and 243747 transitions. [2022-01-10 10:11:24,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-01-10 10:11:24,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:24,006 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:11:24,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 10:11:24,006 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:24,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:24,007 INFO L85 PathProgramCache]: Analyzing trace with hash -374261380, now seen corresponding path program 1 times [2022-01-10 10:11:24,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:24,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482704212] [2022-01-10 10:11:24,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:24,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 10:11:24,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:24,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482704212] [2022-01-10 10:11:24,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482704212] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:24,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:24,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:11:24,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440978263] [2022-01-10 10:11:24,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:24,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:11:24,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:24,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:11:24,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:11:24,662 INFO L87 Difference]: Start difference. First operand 215516 states and 243747 transitions. Second operand has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:27,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:27,371 INFO L93 Difference]: Finished difference Result 438616 states and 496616 transitions. [2022-01-10 10:11:27,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:11:27,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2022-01-10 10:11:27,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:27,871 INFO L225 Difference]: With dead ends: 438616 [2022-01-10 10:11:27,871 INFO L226 Difference]: Without dead ends: 223102 [2022-01-10 10:11:28,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:11:28,075 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 358 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:28,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 81 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 10:11:28,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223102 states. [2022-01-10 10:11:30,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223102 to 213492. [2022-01-10 10:11:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213492 states, 213491 states have (on average 1.1320898773250394) internal successors, (241691), 213491 states have internal predecessors, (241691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:31,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213492 states to 213492 states and 241691 transitions. [2022-01-10 10:11:31,255 INFO L78 Accepts]: Start accepts. Automaton has 213492 states and 241691 transitions. Word has length 265 [2022-01-10 10:11:31,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:31,255 INFO L470 AbstractCegarLoop]: Abstraction has 213492 states and 241691 transitions. [2022-01-10 10:11:31,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:31,256 INFO L276 IsEmpty]: Start isEmpty. Operand 213492 states and 241691 transitions. [2022-01-10 10:11:31,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-01-10 10:11:31,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:31,282 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:11:31,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-10 10:11:31,283 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:31,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:31,283 INFO L85 PathProgramCache]: Analyzing trace with hash 425778373, now seen corresponding path program 1 times [2022-01-10 10:11:31,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:31,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480690487] [2022-01-10 10:11:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:31,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-01-10 10:11:31,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:31,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480690487] [2022-01-10 10:11:31,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480690487] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:31,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:31,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 10:11:31,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497799757] [2022-01-10 10:11:31,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:31,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 10:11:31,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:31,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 10:11:31,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:11:31,391 INFO L87 Difference]: Start difference. First operand 213492 states and 241691 transitions. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:34,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:34,316 INFO L93 Difference]: Finished difference Result 448922 states and 508354 transitions. [2022-01-10 10:11:34,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 10:11:34,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2022-01-10 10:11:34,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:34,715 INFO L225 Difference]: With dead ends: 448922 [2022-01-10 10:11:34,716 INFO L226 Difference]: Without dead ends: 235432 [2022-01-10 10:11:34,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 10:11:34,776 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 750 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:34,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 313 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 10:11:34,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235432 states. [2022-01-10 10:11:37,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235432 to 221409. [2022-01-10 10:11:37,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221409 states, 221408 states have (on average 1.1334278797514092) internal successors, (250950), 221408 states have internal predecessors, (250950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:38,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221409 states to 221409 states and 250950 transitions. [2022-01-10 10:11:38,518 INFO L78 Accepts]: Start accepts. Automaton has 221409 states and 250950 transitions. Word has length 269 [2022-01-10 10:11:38,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 10:11:38,518 INFO L470 AbstractCegarLoop]: Abstraction has 221409 states and 250950 transitions. [2022-01-10 10:11:38,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:38,518 INFO L276 IsEmpty]: Start isEmpty. Operand 221409 states and 250950 transitions. [2022-01-10 10:11:38,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-01-10 10:11:38,554 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 10:11:38,554 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 10:11:38,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 10:11:38,554 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 10:11:38,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 10:11:38,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1328569048, now seen corresponding path program 1 times [2022-01-10 10:11:38,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 10:11:38,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065900779] [2022-01-10 10:11:38,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 10:11:38,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 10:11:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 10:11:38,702 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-10 10:11:38,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 10:11:38,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065900779] [2022-01-10 10:11:38,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065900779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 10:11:38,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 10:11:38,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 10:11:38,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761714355] [2022-01-10 10:11:38,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 10:11:38,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 10:11:38,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 10:11:38,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 10:11:38,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:11:38,703 INFO L87 Difference]: Start difference. First operand 221409 states and 250950 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 10:11:41,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 10:11:41,589 INFO L93 Difference]: Finished difference Result 528249 states and 600380 transitions. [2022-01-10 10:11:41,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 10:11:41,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 295 [2022-01-10 10:11:41,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 10:11:42,096 INFO L225 Difference]: With dead ends: 528249 [2022-01-10 10:11:42,096 INFO L226 Difference]: Without dead ends: 306842 [2022-01-10 10:11:42,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 10:11:42,177 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 156 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 10:11:42,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 163 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 10:11:42,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306842 states.