/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_LAZY.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 15:59:29,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 15:59:29,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 15:59:29,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 15:59:29,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 15:59:29,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 15:59:29,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 15:59:29,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 15:59:29,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 15:59:29,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 15:59:29,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 15:59:29,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 15:59:29,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 15:59:29,659 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 15:59:29,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 15:59:29,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 15:59:29,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 15:59:29,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 15:59:29,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 15:59:29,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 15:59:29,665 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 15:59:29,666 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 15:59:29,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 15:59:29,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 15:59:29,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 15:59:29,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 15:59:29,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 15:59:29,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 15:59:29,669 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 15:59:29,710 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 15:59:29,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 15:59:29,710 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 15:59:29,711 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 15:59:29,711 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 15:59:29,711 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 15:59:29,711 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 15:59:29,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 15:59:29,712 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 15:59:29,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 15:59:29,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 15:59:29,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 15:59:29,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 15:59:29,712 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 15:59:29,712 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 15:59:29,712 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 15:59:29,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 15:59:29,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 15:59:29,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 15:59:29,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 15:59:29,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 15:59:29,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 15:59:29,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 15:59:29,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 15:59:29,713 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 15:59:29,713 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 15:59:29,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 15:59:29,713 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 15:59:29,713 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 15:59:29,714 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 15:59:29,714 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 15:59:29,714 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 15:59:29,714 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 15:59:29,714 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 15:59:29,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 15:59:29,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 15:59:29,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 15:59:29,936 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 15:59:29,938 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 15:59:29,939 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label10.c [2022-01-10 15:59:29,982 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e48604a/4e3852dcaf4d4b69868fdea5477b1407/FLAGc5f8c5287 [2022-01-10 15:59:30,541 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 15:59:30,542 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label10.c [2022-01-10 15:59:30,556 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e48604a/4e3852dcaf4d4b69868fdea5477b1407/FLAGc5f8c5287 [2022-01-10 15:59:30,772 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5e48604a/4e3852dcaf4d4b69868fdea5477b1407 [2022-01-10 15:59:30,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 15:59:30,776 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 15:59:30,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 15:59:30,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 15:59:30,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 15:59:30,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:59:30" (1/1) ... [2022-01-10 15:59:30,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@445d735d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:30, skipping insertion in model container [2022-01-10 15:59:30,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:59:30" (1/1) ... [2022-01-10 15:59:30,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 15:59:30,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 15:59:31,258 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_label10.c[58665,58678] [2022-01-10 15:59:31,294 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 15:59:31,303 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 15:59:31,550 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_label10.c[58665,58678] [2022-01-10 15:59:31,559 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 15:59:31,573 INFO L208 MainTranslator]: Completed translation [2022-01-10 15:59:31,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31 WrapperNode [2022-01-10 15:59:31,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 15:59:31,575 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 15:59:31,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 15:59:31,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 15:59:31,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31" (1/1) ... [2022-01-10 15:59:31,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31" (1/1) ... [2022-01-10 15:59:31,701 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2022-01-10 15:59:31,701 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 15:59:31,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 15:59:31,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 15:59:31,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 15:59:31,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31" (1/1) ... [2022-01-10 15:59:31,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31" (1/1) ... [2022-01-10 15:59:31,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31" (1/1) ... [2022-01-10 15:59:31,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31" (1/1) ... [2022-01-10 15:59:31,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31" (1/1) ... [2022-01-10 15:59:31,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31" (1/1) ... [2022-01-10 15:59:31,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31" (1/1) ... [2022-01-10 15:59:31,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 15:59:31,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 15:59:31,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 15:59:31,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 15:59:31,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31" (1/1) ... [2022-01-10 15:59:31,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 15:59:31,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:59:31,814 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 15:59:31,849 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 15:59:31,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 15:59:31,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 15:59:31,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 15:59:31,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 15:59:31,954 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 15:59:31,955 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 15:59:33,538 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 15:59:33,547 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 15:59:33,547 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 15:59:33,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:59:33 BoogieIcfgContainer [2022-01-10 15:59:33,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 15:59:33,549 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 15:59:33,549 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 15:59:33,551 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 15:59:33,553 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:59:33" (1/1) ... [2022-01-10 15:59:33,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 03:59:33 BasicIcfg [2022-01-10 15:59:33,893 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 15:59:33,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 15:59:33,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 15:59:33,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 15:59:33,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:59:30" (1/4) ... [2022-01-10 15:59:33,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77bdafcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:59:33, skipping insertion in model container [2022-01-10 15:59:33,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:59:31" (2/4) ... [2022-01-10 15:59:33,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77bdafcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:59:33, skipping insertion in model container [2022-01-10 15:59:33,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:59:33" (3/4) ... [2022-01-10 15:59:33,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77bdafcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 03:59:33, skipping insertion in model container [2022-01-10 15:59:33,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 03:59:33" (4/4) ... [2022-01-10 15:59:33,897 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label10.cTransformedIcfg [2022-01-10 15:59:33,900 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 15:59:33,900 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 15:59:33,927 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 15:59:33,931 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 15:59:33,932 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 15:59:33,943 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 15:59:33,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-10 15:59:33,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:33,952 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, 1, 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 15:59:33,952 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:33,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:33,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1729541413, now seen corresponding path program 1 times [2022-01-10 15:59:33,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:33,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183613695] [2022-01-10 15:59:33,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:33,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:34,572 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 15:59:34,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:34,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183613695] [2022-01-10 15:59:34,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183613695] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:34,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:34,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 15:59:34,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050797435] [2022-01-10 15:59:34,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:34,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:34,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:34,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:34,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:59:34,605 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 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 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 15:59:35,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:35,766 INFO L93 Difference]: Finished difference Result 860 states and 1507 transitions. [2022-01-10 15:59:35,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:35,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 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 181 [2022-01-10 15:59:35,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:35,807 INFO L225 Difference]: With dead ends: 860 [2022-01-10 15:59:35,808 INFO L226 Difference]: Without dead ends: 465 [2022-01-10 15:59:35,816 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 15:59:35,820 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 123 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 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, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:35,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 169 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 15:59:35,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-01-10 15:59:35,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 459. [2022-01-10 15:59:35,927 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 15:59:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 713 transitions. [2022-01-10 15:59:35,938 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 713 transitions. Word has length 181 [2022-01-10 15:59:35,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:35,941 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 713 transitions. [2022-01-10 15:59:35,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 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 15:59:35,943 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 713 transitions. [2022-01-10 15:59:35,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-10 15:59:35,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:35,954 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, 1, 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 15:59:35,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 15:59:35,955 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:35,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:35,956 INFO L85 PathProgramCache]: Analyzing trace with hash -721922879, now seen corresponding path program 1 times [2022-01-10 15:59:35,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:35,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370252763] [2022-01-10 15:59:35,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:35,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:36,184 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 15:59:36,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:36,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370252763] [2022-01-10 15:59:36,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370252763] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:36,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:36,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 15:59:36,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367662947] [2022-01-10 15:59:36,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:36,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:36,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:36,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:36,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:59:36,190 INFO L87 Difference]: Start difference. First operand 459 states and 713 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 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 15:59:37,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:37,227 INFO L93 Difference]: Finished difference Result 1343 states and 2102 transitions. [2022-01-10 15:59:37,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:37,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 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 189 [2022-01-10 15:59:37,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:37,231 INFO L225 Difference]: With dead ends: 1343 [2022-01-10 15:59:37,231 INFO L226 Difference]: Without dead ends: 886 [2022-01-10 15:59:37,232 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 15:59:37,233 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:37,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 93 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 15:59:37,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-01-10 15:59:37,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 868. [2022-01-10 15:59:37,253 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 15:59:37,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1329 transitions. [2022-01-10 15:59:37,255 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1329 transitions. Word has length 189 [2022-01-10 15:59:37,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:37,256 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1329 transitions. [2022-01-10 15:59:37,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 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 15:59:37,256 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1329 transitions. [2022-01-10 15:59:37,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-10 15:59:37,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:37,258 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, 1, 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 15:59:37,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 15:59:37,259 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:37,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:37,259 INFO L85 PathProgramCache]: Analyzing trace with hash -204603837, now seen corresponding path program 1 times [2022-01-10 15:59:37,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:37,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640207986] [2022-01-10 15:59:37,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:37,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:37,370 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 15:59:37,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:37,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640207986] [2022-01-10 15:59:37,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640207986] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:37,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:37,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 15:59:37,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182270312] [2022-01-10 15:59:37,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:37,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:37,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:37,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:37,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:59:37,373 INFO L87 Difference]: Start difference. First operand 868 states and 1329 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 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 15:59:37,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:37,798 INFO L93 Difference]: Finished difference Result 1710 states and 2622 transitions. [2022-01-10 15:59:37,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:37,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 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 194 [2022-01-10 15:59:37,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:37,801 INFO L225 Difference]: With dead ends: 1710 [2022-01-10 15:59:37,801 INFO L226 Difference]: Without dead ends: 844 [2022-01-10 15:59:37,802 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 15:59:37,802 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 329 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 15:59:37,803 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 15:59:37,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2022-01-10 15:59:37,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 844. [2022-01-10 15:59:37,813 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 15:59:37,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1245 transitions. [2022-01-10 15:59:37,814 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1245 transitions. Word has length 194 [2022-01-10 15:59:37,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:37,815 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1245 transitions. [2022-01-10 15:59:37,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 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 15:59:37,815 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1245 transitions. [2022-01-10 15:59:37,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-10 15:59:37,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:37,817 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, 1, 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 15:59:37,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 15:59:37,817 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:37,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:37,818 INFO L85 PathProgramCache]: Analyzing trace with hash 384702049, now seen corresponding path program 1 times [2022-01-10 15:59:37,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:37,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625140532] [2022-01-10 15:59:37,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:37,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:37,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:37,910 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 15:59:37,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:37,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625140532] [2022-01-10 15:59:37,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625140532] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:37,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:37,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 15:59:37,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919714256] [2022-01-10 15:59:37,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:37,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:37,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:37,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:37,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:59:37,912 INFO L87 Difference]: Start difference. First operand 844 states and 1245 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 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 15:59:38,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:38,789 INFO L93 Difference]: Finished difference Result 2515 states and 3715 transitions. [2022-01-10 15:59:38,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:38,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 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 195 [2022-01-10 15:59:38,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:38,794 INFO L225 Difference]: With dead ends: 2515 [2022-01-10 15:59:38,794 INFO L226 Difference]: Without dead ends: 1673 [2022-01-10 15:59:38,795 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 15:59:38,795 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 241 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:38,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 92 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 15:59:38,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2022-01-10 15:59:38,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1672. [2022-01-10 15:59:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 1.4105326152004787) internal successors, (2357), 1671 states have internal predecessors, (2357), 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 15:59:38,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2357 transitions. [2022-01-10 15:59:38,819 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2357 transitions. Word has length 195 [2022-01-10 15:59:38,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:38,819 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 2357 transitions. [2022-01-10 15:59:38,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 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 15:59:38,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2357 transitions. [2022-01-10 15:59:38,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-10 15:59:38,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:38,822 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, 1, 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 15:59:38,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 15:59:38,822 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:38,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:38,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1006188701, now seen corresponding path program 1 times [2022-01-10 15:59:38,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:38,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838567751] [2022-01-10 15:59:38,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:38,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:38,907 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 15:59:38,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:38,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838567751] [2022-01-10 15:59:38,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838567751] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:38,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:38,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 15:59:38,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181369518] [2022-01-10 15:59:38,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:38,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:38,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:38,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:38,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:59:38,909 INFO L87 Difference]: Start difference. First operand 1672 states and 2357 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 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 15:59:39,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:39,698 INFO L93 Difference]: Finished difference Result 4174 states and 5863 transitions. [2022-01-10 15:59:39,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:39,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 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 196 [2022-01-10 15:59:39,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:39,705 INFO L225 Difference]: With dead ends: 4174 [2022-01-10 15:59:39,706 INFO L226 Difference]: Without dead ends: 2504 [2022-01-10 15:59:39,707 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 15:59:39,708 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, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:39,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 68 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 15:59:39,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2022-01-10 15:59:39,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2503. [2022-01-10 15:59:39,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2503 states, 2502 states have (on average 1.3916866506794565) internal successors, (3482), 2502 states have internal predecessors, (3482), 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 15:59:39,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 3482 transitions. [2022-01-10 15:59:39,739 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 3482 transitions. Word has length 196 [2022-01-10 15:59:39,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:39,739 INFO L470 AbstractCegarLoop]: Abstraction has 2503 states and 3482 transitions. [2022-01-10 15:59:39,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 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 15:59:39,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 3482 transitions. [2022-01-10 15:59:39,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-10 15:59:39,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:39,743 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, 1, 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 15:59:39,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 15:59:39,743 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:39,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:39,744 INFO L85 PathProgramCache]: Analyzing trace with hash 936342151, now seen corresponding path program 1 times [2022-01-10 15:59:39,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:39,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120553901] [2022-01-10 15:59:39,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:39,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:39,831 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 15:59:39,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:39,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120553901] [2022-01-10 15:59:39,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120553901] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:39,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:39,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 15:59:39,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830752687] [2022-01-10 15:59:39,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:39,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:39,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:39,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:39,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:59:39,833 INFO L87 Difference]: Start difference. First operand 2503 states and 3482 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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 15:59:40,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:40,165 INFO L93 Difference]: Finished difference Result 7478 states and 10404 transitions. [2022-01-10 15:59:40,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:40,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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 201 [2022-01-10 15:59:40,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:40,179 INFO L225 Difference]: With dead ends: 7478 [2022-01-10 15:59:40,179 INFO L226 Difference]: Without dead ends: 4977 [2022-01-10 15:59:40,182 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 15:59:40,184 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, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:40,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 494 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 15:59:40,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2022-01-10 15:59:40,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 4975. [2022-01-10 15:59:40,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4975 states, 4974 states have (on average 1.3882187374346602) internal successors, (6905), 4974 states have internal predecessors, (6905), 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 15:59:40,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4975 states to 4975 states and 6905 transitions. [2022-01-10 15:59:40,312 INFO L78 Accepts]: Start accepts. Automaton has 4975 states and 6905 transitions. Word has length 201 [2022-01-10 15:59:40,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:40,312 INFO L470 AbstractCegarLoop]: Abstraction has 4975 states and 6905 transitions. [2022-01-10 15:59:40,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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 15:59:40,312 INFO L276 IsEmpty]: Start isEmpty. Operand 4975 states and 6905 transitions. [2022-01-10 15:59:40,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-10 15:59:40,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:40,317 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, 1, 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 15:59:40,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 15:59:40,318 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:40,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:40,318 INFO L85 PathProgramCache]: Analyzing trace with hash -282162423, now seen corresponding path program 1 times [2022-01-10 15:59:40,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:40,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983699028] [2022-01-10 15:59:40,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:40,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:40,426 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 15:59:40,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:40,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983699028] [2022-01-10 15:59:40,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983699028] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:40,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:40,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 15:59:40,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948593319] [2022-01-10 15:59:40,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:40,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:40,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:40,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:40,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:59:40,428 INFO L87 Difference]: Start difference. First operand 4975 states and 6905 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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 15:59:41,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:41,224 INFO L93 Difference]: Finished difference Result 9930 states and 13776 transitions. [2022-01-10 15:59:41,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:41,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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 203 [2022-01-10 15:59:41,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:41,238 INFO L225 Difference]: With dead ends: 9930 [2022-01-10 15:59:41,238 INFO L226 Difference]: Without dead ends: 4957 [2022-01-10 15:59:41,244 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 15:59:41,246 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 253 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:41,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 339 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 15:59:41,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4957 states. [2022-01-10 15:59:41,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4957 to 4955. [2022-01-10 15:59:41,303 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 15:59:41,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4955 states to 4955 states and 6347 transitions. [2022-01-10 15:59:41,310 INFO L78 Accepts]: Start accepts. Automaton has 4955 states and 6347 transitions. Word has length 203 [2022-01-10 15:59:41,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:41,311 INFO L470 AbstractCegarLoop]: Abstraction has 4955 states and 6347 transitions. [2022-01-10 15:59:41,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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 15:59:41,311 INFO L276 IsEmpty]: Start isEmpty. Operand 4955 states and 6347 transitions. [2022-01-10 15:59:41,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-10 15:59:41,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:41,318 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:59:41,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 15:59:41,318 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:41,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:41,318 INFO L85 PathProgramCache]: Analyzing trace with hash 2130930139, now seen corresponding path program 1 times [2022-01-10 15:59:41,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:41,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544588801] [2022-01-10 15:59:41,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:41,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 15:59:41,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:41,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544588801] [2022-01-10 15:59:41,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544588801] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:41,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:41,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 15:59:41,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667110105] [2022-01-10 15:59:41,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:41,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:41,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:41,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:41,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:59:41,456 INFO L87 Difference]: Start difference. First operand 4955 states and 6347 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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 15:59:42,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:42,353 INFO L93 Difference]: Finished difference Result 14784 states and 18937 transitions. [2022-01-10 15:59:42,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:42,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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 219 [2022-01-10 15:59:42,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:42,383 INFO L225 Difference]: With dead ends: 14784 [2022-01-10 15:59:42,383 INFO L226 Difference]: Without dead ends: 9831 [2022-01-10 15:59:42,390 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 15:59:42,391 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 196 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 375 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 15:59:42,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 375 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 15:59:42,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9831 states. [2022-01-10 15:59:42,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9831 to 9827. [2022-01-10 15:59:42,524 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 15:59:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9827 states to 9827 states and 11601 transitions. [2022-01-10 15:59:42,545 INFO L78 Accepts]: Start accepts. Automaton has 9827 states and 11601 transitions. Word has length 219 [2022-01-10 15:59:42,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:42,547 INFO L470 AbstractCegarLoop]: Abstraction has 9827 states and 11601 transitions. [2022-01-10 15:59:42,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 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 15:59:42,547 INFO L276 IsEmpty]: Start isEmpty. Operand 9827 states and 11601 transitions. [2022-01-10 15:59:42,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-10 15:59:42,558 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:42,558 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:59:42,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 15:59:42,559 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:42,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:42,559 INFO L85 PathProgramCache]: Analyzing trace with hash -256661889, now seen corresponding path program 1 times [2022-01-10 15:59:42,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:42,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746009610] [2022-01-10 15:59:42,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:42,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:59:42,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:42,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746009610] [2022-01-10 15:59:42,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746009610] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:42,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:42,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 15:59:42,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684561714] [2022-01-10 15:59:42,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:42,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 15:59:42,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:42,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 15:59:42,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 15:59:42,684 INFO L87 Difference]: Start difference. First operand 9827 states and 11601 transitions. Second operand has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 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 15:59:43,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:43,820 INFO L93 Difference]: Finished difference Result 31921 states and 37851 transitions. [2022-01-10 15:59:43,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 15:59:43,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 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 219 [2022-01-10 15:59:43,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:43,854 INFO L225 Difference]: With dead ends: 31921 [2022-01-10 15:59:43,854 INFO L226 Difference]: Without dead ends: 22096 [2022-01-10 15:59:43,867 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 15:59:43,868 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 528 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:43,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 478 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 15:59:43,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22096 states. [2022-01-10 15:59:44,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22096 to 22078. [2022-01-10 15:59:44,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22078 states, 22077 states have (on average 1.1824070299406622) internal successors, (26104), 22077 states have internal predecessors, (26104), 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 15:59:44,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22078 states to 22078 states and 26104 transitions. [2022-01-10 15:59:44,180 INFO L78 Accepts]: Start accepts. Automaton has 22078 states and 26104 transitions. Word has length 219 [2022-01-10 15:59:44,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:44,180 INFO L470 AbstractCegarLoop]: Abstraction has 22078 states and 26104 transitions. [2022-01-10 15:59:44,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 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 15:59:44,180 INFO L276 IsEmpty]: Start isEmpty. Operand 22078 states and 26104 transitions. [2022-01-10 15:59:44,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-01-10 15:59:44,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:44,193 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:59:44,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 15:59:44,193 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:44,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:44,194 INFO L85 PathProgramCache]: Analyzing trace with hash -619330742, now seen corresponding path program 1 times [2022-01-10 15:59:44,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:44,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970765264] [2022-01-10 15:59:44,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:44,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:44,327 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:59:44,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:44,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970765264] [2022-01-10 15:59:44,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970765264] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 15:59:44,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064009417] [2022-01-10 15:59:44,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:44,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:59:44,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:59:44,336 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 15:59:44,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 15:59:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:44,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 6576 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 15:59:45,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 15:59:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 15:59:45,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 15:59:45,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064009417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:45,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 15:59:45,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 15:59:45,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501038137] [2022-01-10 15:59:45,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:45,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:45,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:45,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:45,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 15:59:45,449 INFO L87 Difference]: Start difference. First operand 22078 states and 26104 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 15:59:46,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:46,557 INFO L93 Difference]: Finished difference Result 44160 states and 52216 transitions. [2022-01-10 15:59:46,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:46,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 229 [2022-01-10 15:59:46,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:46,599 INFO L225 Difference]: With dead ends: 44160 [2022-01-10 15:59:46,600 INFO L226 Difference]: Without dead ends: 22084 [2022-01-10 15:59:46,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 15:59:46,646 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 88 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:46,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 47 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 15:59:46,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22084 states. [2022-01-10 15:59:46,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22084 to 22078. [2022-01-10 15:59:46,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22078 states, 22077 states have (on average 1.1802328214884268) internal successors, (26056), 22077 states have internal predecessors, (26056), 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 15:59:46,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22078 states to 22078 states and 26056 transitions. [2022-01-10 15:59:46,892 INFO L78 Accepts]: Start accepts. Automaton has 22078 states and 26056 transitions. Word has length 229 [2022-01-10 15:59:46,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:46,892 INFO L470 AbstractCegarLoop]: Abstraction has 22078 states and 26056 transitions. [2022-01-10 15:59:46,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 15:59:46,893 INFO L276 IsEmpty]: Start isEmpty. Operand 22078 states and 26056 transitions. [2022-01-10 15:59:46,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-01-10 15:59:46,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:46,907 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:59:46,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 15:59:47,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-10 15:59:47,124 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:47,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:47,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1828207988, now seen corresponding path program 1 times [2022-01-10 15:59:47,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:47,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313453856] [2022-01-10 15:59:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:47,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-01-10 15:59:47,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:47,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313453856] [2022-01-10 15:59:47,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313453856] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:47,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:47,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 15:59:47,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036056765] [2022-01-10 15:59:47,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:47,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:47,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:47,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:47,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:59:47,234 INFO L87 Difference]: Start difference. First operand 22078 states and 26056 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 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 15:59:48,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:48,122 INFO L93 Difference]: Finished difference Result 54716 states and 65478 transitions. [2022-01-10 15:59:48,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:48,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 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 258 [2022-01-10 15:59:48,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:48,308 INFO L225 Difference]: With dead ends: 54716 [2022-01-10 15:59:48,308 INFO L226 Difference]: Without dead ends: 32640 [2022-01-10 15:59:48,322 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 15:59:48,323 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 209 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:48,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 135 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 15:59:48,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32640 states. [2022-01-10 15:59:48,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32640 to 32634. [2022-01-10 15:59:48,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32634 states, 32633 states have (on average 1.1539852296754818) internal successors, (37658), 32633 states have internal predecessors, (37658), 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 15:59:48,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32634 states to 32634 states and 37658 transitions. [2022-01-10 15:59:48,591 INFO L78 Accepts]: Start accepts. Automaton has 32634 states and 37658 transitions. Word has length 258 [2022-01-10 15:59:48,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:48,591 INFO L470 AbstractCegarLoop]: Abstraction has 32634 states and 37658 transitions. [2022-01-10 15:59:48,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 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 15:59:48,592 INFO L276 IsEmpty]: Start isEmpty. Operand 32634 states and 37658 transitions. [2022-01-10 15:59:48,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-01-10 15:59:48,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:48,605 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, 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] [2022-01-10 15:59:48,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 15:59:48,605 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:48,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:48,606 INFO L85 PathProgramCache]: Analyzing trace with hash -796485633, now seen corresponding path program 1 times [2022-01-10 15:59:48,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:48,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519625262] [2022-01-10 15:59:48,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:48,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 15:59:48,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:48,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519625262] [2022-01-10 15:59:48,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519625262] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:48,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:48,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 15:59:48,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127909782] [2022-01-10 15:59:48,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:48,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:48,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:48,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:48,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:59:48,779 INFO L87 Difference]: Start difference. First operand 32634 states and 37658 transitions. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 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 15:59:50,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:50,022 INFO L93 Difference]: Finished difference Result 72202 states and 83548 transitions. [2022-01-10 15:59:50,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:50,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 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 281 [2022-01-10 15:59:50,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:50,093 INFO L225 Difference]: With dead ends: 72202 [2022-01-10 15:59:50,094 INFO L226 Difference]: Without dead ends: 39570 [2022-01-10 15:59:50,108 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 15:59:50,108 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 134 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:50,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 351 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 15:59:50,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39570 states. [2022-01-10 15:59:50,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39570 to 39560. [2022-01-10 15:59:50,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39560 states, 39559 states have (on average 1.14568113450795) internal successors, (45322), 39559 states have internal predecessors, (45322), 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 15:59:50,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39560 states to 39560 states and 45322 transitions. [2022-01-10 15:59:50,604 INFO L78 Accepts]: Start accepts. Automaton has 39560 states and 45322 transitions. Word has length 281 [2022-01-10 15:59:50,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:50,604 INFO L470 AbstractCegarLoop]: Abstraction has 39560 states and 45322 transitions. [2022-01-10 15:59:50,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 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 15:59:50,605 INFO L276 IsEmpty]: Start isEmpty. Operand 39560 states and 45322 transitions. [2022-01-10 15:59:50,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-01-10 15:59:50,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:50,624 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, 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] [2022-01-10 15:59:50,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 15:59:50,624 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:50,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:50,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1999811071, now seen corresponding path program 1 times [2022-01-10 15:59:50,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:50,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165271637] [2022-01-10 15:59:50,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:50,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 15:59:50,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:50,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165271637] [2022-01-10 15:59:50,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165271637] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:50,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:50,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 15:59:50,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896188897] [2022-01-10 15:59:50,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:50,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 15:59:50,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:50,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 15:59:50,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 15:59:50,930 INFO L87 Difference]: Start difference. First operand 39560 states and 45322 transitions. Second operand has 4 states, 4 states have (on average 74.25) internal successors, (297), 3 states have internal predecessors, (297), 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 15:59:52,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:52,390 INFO L93 Difference]: Finished difference Result 81584 states and 93500 transitions. [2022-01-10 15:59:52,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 15:59:52,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 3 states have internal predecessors, (297), 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 297 [2022-01-10 15:59:52,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:52,439 INFO L225 Difference]: With dead ends: 81584 [2022-01-10 15:59:52,439 INFO L226 Difference]: Without dead ends: 42026 [2022-01-10 15:59:52,469 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 15:59:52,470 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 351 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:52,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 90 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 15:59:52,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42026 states. [2022-01-10 15:59:52,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42026 to 39560. [2022-01-10 15:59:52,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39560 states, 39559 states have (on average 1.14568113450795) internal successors, (45322), 39559 states have internal predecessors, (45322), 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 15:59:53,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39560 states to 39560 states and 45322 transitions. [2022-01-10 15:59:53,021 INFO L78 Accepts]: Start accepts. Automaton has 39560 states and 45322 transitions. Word has length 297 [2022-01-10 15:59:53,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:53,021 INFO L470 AbstractCegarLoop]: Abstraction has 39560 states and 45322 transitions. [2022-01-10 15:59:53,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.25) internal successors, (297), 3 states have internal predecessors, (297), 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 15:59:53,021 INFO L276 IsEmpty]: Start isEmpty. Operand 39560 states and 45322 transitions. [2022-01-10 15:59:53,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2022-01-10 15:59:53,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:53,039 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 15:59:53,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 15:59:53,040 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:53,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:53,040 INFO L85 PathProgramCache]: Analyzing trace with hash 851003183, now seen corresponding path program 1 times [2022-01-10 15:59:53,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:53,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732934933] [2022-01-10 15:59:53,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:53,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-01-10 15:59:53,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:53,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732934933] [2022-01-10 15:59:53,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732934933] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:53,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 15:59:53,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 15:59:53,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44138725] [2022-01-10 15:59:53,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:53,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 15:59:53,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:53,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 15:59:53,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 15:59:53,282 INFO L87 Difference]: Start difference. First operand 39560 states and 45322 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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 15:59:54,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:54,418 INFO L93 Difference]: Finished difference Result 94791 states and 108938 transitions. [2022-01-10 15:59:54,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 15:59:54,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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 335 [2022-01-10 15:59:54,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:54,480 INFO L225 Difference]: With dead ends: 94791 [2022-01-10 15:59:54,480 INFO L226 Difference]: Without dead ends: 53609 [2022-01-10 15:59:54,498 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 15:59:54,499 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 167 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:54,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 341 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 15:59:54,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53609 states. [2022-01-10 15:59:55,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53609 to 50116. [2022-01-10 15:59:55,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50116 states, 50115 states have (on average 1.1024443779307593) internal successors, (55249), 50115 states have internal predecessors, (55249), 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 15:59:55,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50116 states to 50116 states and 55249 transitions. [2022-01-10 15:59:55,155 INFO L78 Accepts]: Start accepts. Automaton has 50116 states and 55249 transitions. Word has length 335 [2022-01-10 15:59:55,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 15:59:55,155 INFO L470 AbstractCegarLoop]: Abstraction has 50116 states and 55249 transitions. [2022-01-10 15:59:55,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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 15:59:55,155 INFO L276 IsEmpty]: Start isEmpty. Operand 50116 states and 55249 transitions. [2022-01-10 15:59:55,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-01-10 15:59:55,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 15:59:55,172 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:59:55,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 15:59:55,172 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 15:59:55,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 15:59:55,173 INFO L85 PathProgramCache]: Analyzing trace with hash 490483037, now seen corresponding path program 1 times [2022-01-10 15:59:55,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 15:59:55,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466245173] [2022-01-10 15:59:55,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:55,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 15:59:55,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 128 proven. 6 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-01-10 15:59:55,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 15:59:55,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466245173] [2022-01-10 15:59:55,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466245173] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 15:59:55,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822566250] [2022-01-10 15:59:55,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 15:59:55,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 15:59:55,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 15:59:55,463 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 15:59:55,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 15:59:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 15:59:56,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 10018 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 15:59:56,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 15:59:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 15:59:57,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 15:59:57,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822566250] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 15:59:57,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 15:59:57,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2022-01-10 15:59:57,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190749042] [2022-01-10 15:59:57,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 15:59:57,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 15:59:57,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 15:59:57,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 15:59:57,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 15:59:57,495 INFO L87 Difference]: Start difference. First operand 50116 states and 55249 transitions. Second operand has 4 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 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 15:59:58,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 15:59:58,917 INFO L93 Difference]: Finished difference Result 171692 states and 189084 transitions. [2022-01-10 15:59:58,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 15:59:58,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 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 342 [2022-01-10 15:59:58,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 15:59:59,083 INFO L225 Difference]: With dead ends: 171692 [2022-01-10 15:59:59,083 INFO L226 Difference]: Without dead ends: 121578 [2022-01-10 15:59:59,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-10 15:59:59,285 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 507 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 15:59:59,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 284 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 15:59:59,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121578 states. [2022-01-10 16:00:00,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121578 to 121557. [2022-01-10 16:00:00,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121557 states, 121556 states have (on average 1.1000361973082364) internal successors, (133716), 121556 states have internal predecessors, (133716), 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 16:00:00,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121557 states to 121557 states and 133716 transitions. [2022-01-10 16:00:00,916 INFO L78 Accepts]: Start accepts. Automaton has 121557 states and 133716 transitions. Word has length 342 [2022-01-10 16:00:00,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:00:00,916 INFO L470 AbstractCegarLoop]: Abstraction has 121557 states and 133716 transitions. [2022-01-10 16:00:00,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 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 16:00:00,916 INFO L276 IsEmpty]: Start isEmpty. Operand 121557 states and 133716 transitions. [2022-01-10 16:00:00,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-01-10 16:00:00,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:00:00,952 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:00:00,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 16:00:01,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-10 16:00:01,168 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:00:01,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:00:01,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1584760478, now seen corresponding path program 1 times [2022-01-10 16:00:01,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:00:01,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835649852] [2022-01-10 16:00:01,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:00:01,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:00:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:00:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 141 proven. 6 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-01-10 16:00:01,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:00:01,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835649852] [2022-01-10 16:00:01,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835649852] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 16:00:01,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726128090] [2022-01-10 16:00:01,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:00:01,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 16:00:01,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 16:00:01,576 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 16:00:01,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 16:00:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:00:02,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 10821 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 16:00:02,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 16:00:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 287 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-01-10 16:00:03,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 16:00:03,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726128090] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:00:03,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 16:00:03,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 16:00:03,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842094349] [2022-01-10 16:00:03,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:00:03,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:00:03,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:00:03,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:00:03,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 16:00:03,150 INFO L87 Difference]: Start difference. First operand 121557 states and 133716 transitions. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 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 16:00:04,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:00:04,727 INFO L93 Difference]: Finished difference Result 312580 states and 344465 transitions. [2022-01-10 16:00:04,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:00:04,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 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 368 [2022-01-10 16:00:04,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:00:04,970 INFO L225 Difference]: With dead ends: 312580 [2022-01-10 16:00:04,970 INFO L226 Difference]: Without dead ends: 191025 [2022-01-10 16:00:05,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 16:00:05,227 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 156 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 16:00:05,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 120 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 16:00:05,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191025 states. [2022-01-10 16:00:07,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191025 to 181853. [2022-01-10 16:00:07,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181853 states, 181852 states have (on average 1.0970239535446407) internal successors, (199496), 181852 states have internal predecessors, (199496), 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 16:00:07,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181853 states to 181853 states and 199496 transitions. [2022-01-10 16:00:07,956 INFO L78 Accepts]: Start accepts. Automaton has 181853 states and 199496 transitions. Word has length 368 [2022-01-10 16:00:07,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:00:07,957 INFO L470 AbstractCegarLoop]: Abstraction has 181853 states and 199496 transitions. [2022-01-10 16:00:07,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 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 16:00:07,957 INFO L276 IsEmpty]: Start isEmpty. Operand 181853 states and 199496 transitions. [2022-01-10 16:00:08,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-01-10 16:00:08,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:00:08,014 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 16:00:08,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 16:00:08,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 16:00:08,236 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:00:08,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:00:08,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1035865193, now seen corresponding path program 1 times [2022-01-10 16:00:08,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:00:08,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557424825] [2022-01-10 16:00:08,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:00:08,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:00:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:00:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-01-10 16:00:08,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:00:08,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557424825] [2022-01-10 16:00:08,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557424825] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:00:08,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:00:08,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 16:00:08,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941423269] [2022-01-10 16:00:08,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:00:08,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:00:08,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:00:08,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:00:08,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:00:08,460 INFO L87 Difference]: Start difference. First operand 181853 states and 199496 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 2 states have internal predecessors, (261), 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 16:00:10,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:00:10,654 INFO L93 Difference]: Finished difference Result 400554 states and 440363 transitions. [2022-01-10 16:00:10,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:00:10,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 2 states have internal predecessors, (261), 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 414 [2022-01-10 16:00:10,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:00:10,978 INFO L225 Difference]: With dead ends: 400554 [2022-01-10 16:00:10,978 INFO L226 Difference]: Without dead ends: 218703 [2022-01-10 16:00:11,056 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 16:00:11,057 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 154 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 16:00:11,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 128 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 16:00:11,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218703 states. [2022-01-10 16:00:13,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218703 to 211702. [2022-01-10 16:00:14,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211702 states, 211701 states have (on average 1.1005710884691144) internal successors, (232992), 211701 states have internal predecessors, (232992), 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 16:00:14,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211702 states to 211702 states and 232992 transitions. [2022-01-10 16:00:14,701 INFO L78 Accepts]: Start accepts. Automaton has 211702 states and 232992 transitions. Word has length 414 [2022-01-10 16:00:14,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:00:14,727 INFO L470 AbstractCegarLoop]: Abstraction has 211702 states and 232992 transitions. [2022-01-10 16:00:14,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 2 states have internal predecessors, (261), 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 16:00:14,728 INFO L276 IsEmpty]: Start isEmpty. Operand 211702 states and 232992 transitions. [2022-01-10 16:00:14,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-01-10 16:00:14,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:00:14,821 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-01-10 16:00:14,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 16:00:14,822 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:00:14,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:00:14,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1318013373, now seen corresponding path program 1 times [2022-01-10 16:00:14,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:00:14,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915643753] [2022-01-10 16:00:14,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:00:14,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:00:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:00:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-01-10 16:00:15,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:00:15,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915643753] [2022-01-10 16:00:15,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915643753] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:00:15,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:00:15,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 16:00:15,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287252469] [2022-01-10 16:00:15,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:00:15,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:00:15,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:00:15,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:00:15,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:00:15,123 INFO L87 Difference]: Start difference. First operand 211702 states and 232992 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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 16:00:17,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:00:17,221 INFO L93 Difference]: Finished difference Result 523618 states and 576262 transitions. [2022-01-10 16:00:17,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:00:17,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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 419 [2022-01-10 16:00:17,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:00:17,836 INFO L225 Difference]: With dead ends: 523618 [2022-01-10 16:00:17,836 INFO L226 Difference]: Without dead ends: 311918 [2022-01-10 16:00:17,942 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 16:00:17,943 INFO L933 BasicCegarLoop]: 546 mSDtfsCounter, 278 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 16:00:17,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 787 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 16:00:18,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311918 states. [2022-01-10 16:00:22,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311918 to 311102. [2022-01-10 16:00:22,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311102 states, 311101 states have (on average 1.09555096254914) internal successors, (340827), 311101 states have internal predecessors, (340827), 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 16:00:23,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311102 states to 311102 states and 340827 transitions. [2022-01-10 16:00:23,193 INFO L78 Accepts]: Start accepts. Automaton has 311102 states and 340827 transitions. Word has length 419 [2022-01-10 16:00:23,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:00:23,193 INFO L470 AbstractCegarLoop]: Abstraction has 311102 states and 340827 transitions. [2022-01-10 16:00:23,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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 16:00:23,193 INFO L276 IsEmpty]: Start isEmpty. Operand 311102 states and 340827 transitions. [2022-01-10 16:00:23,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2022-01-10 16:00:23,624 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:00:23,625 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:00:23,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-10 16:00:23,625 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:00:23,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:00:23,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1022824367, now seen corresponding path program 1 times [2022-01-10 16:00:23,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:00:23,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50957417] [2022-01-10 16:00:23,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:00:23,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:00:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:00:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2022-01-10 16:00:23,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:00:23,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50957417] [2022-01-10 16:00:23,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50957417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:00:23,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:00:23,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 16:00:23,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931885857] [2022-01-10 16:00:23,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:00:23,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 16:00:23,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:00:23,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 16:00:23,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 16:00:23,838 INFO L87 Difference]: Start difference. First operand 311102 states and 340827 transitions. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 3 states have internal predecessors, (284), 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 16:00:26,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:00:26,880 INFO L93 Difference]: Finished difference Result 625293 states and 684933 transitions. [2022-01-10 16:00:26,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 16:00:26,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 3 states have internal predecessors, (284), 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 434 [2022-01-10 16:00:26,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:00:27,457 INFO L225 Difference]: With dead ends: 625293 [2022-01-10 16:00:27,457 INFO L226 Difference]: Without dead ends: 314193 [2022-01-10 16:00:27,609 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 16:00:27,609 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 329 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 16:00:27,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 136 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 16:00:27,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314193 states.