/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_NONE.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 21:51:07,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 21:51:07,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 21:51:07,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 21:51:07,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 21:51:07,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 21:51:07,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 21:51:07,731 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 21:51:07,732 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 21:51:07,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 21:51:07,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 21:51:07,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 21:51:07,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 21:51:07,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 21:51:07,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 21:51:07,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 21:51:07,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 21:51:07,752 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 21:51:07,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 21:51:07,753 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 21:51:07,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 21:51:07,755 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 21:51:07,755 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 21:51:07,755 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 21:51:07,756 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 21:51:07,756 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 21:51:07,757 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 21:51:07,757 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 21:51:07,758 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-10 21:51:07,777 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 21:51:07,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 21:51:07,779 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 21:51:07,779 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 21:51:07,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 21:51:07,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 21:51:07,780 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 21:51:07,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 21:51:07,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 21:51:07,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 21:51:07,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 21:51:07,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 21:51:07,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 21:51:07,782 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 21:51:07,782 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 21:51:07,782 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 21:51:07,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 21:51:07,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 21:51:07,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 21:51:07,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 21:51:07,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 21:51:07,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:51:07,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 21:51:07,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 21:51:07,783 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 21:51:07,783 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 21:51:07,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 21:51:07,784 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 21:51:07,784 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 21:51:07,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 21:51:07,784 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 21:51:07,784 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 21:51:07,785 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 21:51:07,785 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 21:51:08,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 21:51:08,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 21:51:08,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 21:51:08,042 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 21:51:08,043 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 21:51:08,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label31.c [2022-01-10 21:51:08,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d92e8625/c2fb0ced2e5f49d3b6aef7b64660b699/FLAGa4d1b4348 [2022-01-10 21:51:08,639 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 21:51:08,639 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label31.c [2022-01-10 21:51:08,657 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d92e8625/c2fb0ced2e5f49d3b6aef7b64660b699/FLAGa4d1b4348 [2022-01-10 21:51:08,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d92e8625/c2fb0ced2e5f49d3b6aef7b64660b699 [2022-01-10 21:51:08,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 21:51:08,871 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 21:51:08,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 21:51:08,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 21:51:08,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 21:51:08,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:51:08" (1/1) ... [2022-01-10 21:51:08,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cee765b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:08, skipping insertion in model container [2022-01-10 21:51:08,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:51:08" (1/1) ... [2022-01-10 21:51:08,890 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 21:51:08,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 21:51:09,437 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_label31.c[54594,54607] [2022-01-10 21:51:09,484 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:51:09,493 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 21:51:09,673 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_label31.c[54594,54607] [2022-01-10 21:51:09,690 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:51:09,708 INFO L208 MainTranslator]: Completed translation [2022-01-10 21:51:09,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:09 WrapperNode [2022-01-10 21:51:09,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 21:51:09,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 21:51:09,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 21:51:09,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 21:51:09,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:09" (1/1) ... [2022-01-10 21:51:09,750 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:09" (1/1) ... [2022-01-10 21:51:09,838 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2022-01-10 21:51:09,839 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 21:51:09,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 21:51:09,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 21:51:09,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 21:51:09,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:09" (1/1) ... [2022-01-10 21:51:09,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:09" (1/1) ... [2022-01-10 21:51:09,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:09" (1/1) ... [2022-01-10 21:51:09,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:09" (1/1) ... [2022-01-10 21:51:09,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:09" (1/1) ... [2022-01-10 21:51:09,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:09" (1/1) ... [2022-01-10 21:51:09,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:09" (1/1) ... [2022-01-10 21:51:09,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 21:51:09,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 21:51:09,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 21:51:09,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 21:51:09,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:09" (1/1) ... [2022-01-10 21:51:09,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:51:09,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:51:09,988 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 21:51:10,013 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 21:51:10,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 21:51:10,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 21:51:10,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 21:51:10,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 21:51:10,133 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 21:51:10,134 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 21:51:12,031 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 21:51:12,039 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 21:51:12,040 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 21:51:12,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:51:12 BoogieIcfgContainer [2022-01-10 21:51:12,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 21:51:12,045 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 21:51:12,045 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 21:51:12,047 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 21:51:12,050 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:51:12" (1/1) ... [2022-01-10 21:51:12,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:51:12 BasicIcfg [2022-01-10 21:51:12,404 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 21:51:12,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 21:51:12,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 21:51:12,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 21:51:12,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:51:08" (1/4) ... [2022-01-10 21:51:12,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62559b39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:51:12, skipping insertion in model container [2022-01-10 21:51:12,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:51:09" (2/4) ... [2022-01-10 21:51:12,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62559b39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:51:12, skipping insertion in model container [2022-01-10 21:51:12,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:51:12" (3/4) ... [2022-01-10 21:51:12,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62559b39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:51:12, skipping insertion in model container [2022-01-10 21:51:12,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:51:12" (4/4) ... [2022-01-10 21:51:12,412 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label31.cTransformedIcfg [2022-01-10 21:51:12,416 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 21:51:12,416 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 21:51:12,456 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 21:51:12,462 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 21:51:12,463 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 21:51:12,479 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 21:51:12,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-10 21:51:12,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:12,490 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] [2022-01-10 21:51:12,490 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:12,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:12,495 INFO L85 PathProgramCache]: Analyzing trace with hash -740704136, now seen corresponding path program 1 times [2022-01-10 21:51:12,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:12,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773240602] [2022-01-10 21:51:12,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:12,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:13,208 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 21:51:13,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:13,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773240602] [2022-01-10 21:51:13,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773240602] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:13,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:13,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:51:13,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465362358] [2022-01-10 21:51:13,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:13,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:13,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:13,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:13,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:13,240 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 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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 21:51:14,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:14,667 INFO L93 Difference]: Finished difference Result 860 states and 1507 transitions. [2022-01-10 21:51:14,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:14,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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 151 [2022-01-10 21:51:14,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:14,685 INFO L225 Difference]: With dead ends: 860 [2022-01-10 21:51:14,685 INFO L226 Difference]: Without dead ends: 465 [2022-01-10 21:51:14,689 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 21:51:14,692 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 153 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 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, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:14,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 169 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 21:51:14,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-01-10 21:51:14,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 459. [2022-01-10 21:51:14,748 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 21:51:14,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 713 transitions. [2022-01-10 21:51:14,750 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 713 transitions. Word has length 151 [2022-01-10 21:51:14,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:14,751 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 713 transitions. [2022-01-10 21:51:14,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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 21:51:14,752 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 713 transitions. [2022-01-10 21:51:14,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-10 21:51:14,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:14,755 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] [2022-01-10 21:51:14,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 21:51:14,755 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:14,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:14,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1287346452, now seen corresponding path program 1 times [2022-01-10 21:51:14,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:14,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234369286] [2022-01-10 21:51:14,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:14,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:14,921 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 21:51:14,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:14,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234369286] [2022-01-10 21:51:14,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234369286] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:14,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:14,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:51:14,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768244010] [2022-01-10 21:51:14,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:14,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:14,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:14,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:14,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:14,925 INFO L87 Difference]: Start difference. First operand 459 states and 713 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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 21:51:16,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:16,006 INFO L93 Difference]: Finished difference Result 1343 states and 2102 transitions. [2022-01-10 21:51:16,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:16,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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 159 [2022-01-10 21:51:16,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:16,011 INFO L225 Difference]: With dead ends: 1343 [2022-01-10 21:51:16,011 INFO L226 Difference]: Without dead ends: 886 [2022-01-10 21:51:16,013 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 21:51:16,014 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:16,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 91 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 21:51:16,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-01-10 21:51:16,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 868. [2022-01-10 21:51:16,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 1.5340253748558246) internal successors, (1330), 867 states have internal predecessors, (1330), 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 21:51:16,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1330 transitions. [2022-01-10 21:51:16,048 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1330 transitions. Word has length 159 [2022-01-10 21:51:16,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:16,049 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1330 transitions. [2022-01-10 21:51:16,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 2 states have internal predecessors, (159), 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 21:51:16,049 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1330 transitions. [2022-01-10 21:51:16,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-10 21:51:16,054 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:16,054 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 21:51:16,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 21:51:16,055 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:16,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:16,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1057008622, now seen corresponding path program 1 times [2022-01-10 21:51:16,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:16,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348805377] [2022-01-10 21:51:16,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:16,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:16,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:51:16,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:16,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348805377] [2022-01-10 21:51:16,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348805377] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:16,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:16,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:51:16,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575280073] [2022-01-10 21:51:16,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:16,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:16,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:16,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:16,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:16,364 INFO L87 Difference]: Start difference. First operand 868 states and 1330 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 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 21:51:17,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:17,318 INFO L93 Difference]: Finished difference Result 2571 states and 3945 transitions. [2022-01-10 21:51:17,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:17,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 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 160 [2022-01-10 21:51:17,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:17,325 INFO L225 Difference]: With dead ends: 2571 [2022-01-10 21:51:17,325 INFO L226 Difference]: Without dead ends: 1705 [2022-01-10 21:51:17,327 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 21:51:17,328 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 253 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:17,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 138 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:51:17,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2022-01-10 21:51:17,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1704. [2022-01-10 21:51:17,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1703 states have (on average 1.4474456840869054) internal successors, (2465), 1703 states have internal predecessors, (2465), 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 21:51:17,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2465 transitions. [2022-01-10 21:51:17,362 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2465 transitions. Word has length 160 [2022-01-10 21:51:17,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:17,363 INFO L470 AbstractCegarLoop]: Abstraction has 1704 states and 2465 transitions. [2022-01-10 21:51:17,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 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 21:51:17,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2465 transitions. [2022-01-10 21:51:17,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-10 21:51:17,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:17,368 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-01-10 21:51:17,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 21:51:17,369 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:17,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:17,369 INFO L85 PathProgramCache]: Analyzing trace with hash 197575084, now seen corresponding path program 1 times [2022-01-10 21:51:17,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:17,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982786289] [2022-01-10 21:51:17,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:17,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:51:17,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:17,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982786289] [2022-01-10 21:51:17,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982786289] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:17,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:17,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:17,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583574213] [2022-01-10 21:51:17,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:17,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:17,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:17,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:17,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:17,659 INFO L87 Difference]: Start difference. First operand 1704 states and 2465 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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 21:51:18,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:18,767 INFO L93 Difference]: Finished difference Result 5033 states and 7290 transitions. [2022-01-10 21:51:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:18,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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 166 [2022-01-10 21:51:18,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:18,780 INFO L225 Difference]: With dead ends: 5033 [2022-01-10 21:51:18,780 INFO L226 Difference]: Without dead ends: 3331 [2022-01-10 21:51:18,783 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 21:51:18,784 INFO L933 BasicCegarLoop]: 385 mSDtfsCounter, 89 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:18,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 414 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 21:51:18,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3331 states. [2022-01-10 21:51:18,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3331 to 3328. [2022-01-10 21:51:18,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3327 states have (on average 1.2957619477006312) internal successors, (4311), 3327 states have internal predecessors, (4311), 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 21:51:18,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 4311 transitions. [2022-01-10 21:51:18,889 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 4311 transitions. Word has length 166 [2022-01-10 21:51:18,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:18,890 INFO L470 AbstractCegarLoop]: Abstraction has 3328 states and 4311 transitions. [2022-01-10 21:51:18,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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 21:51:18,890 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 4311 transitions. [2022-01-10 21:51:18,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-10 21:51:18,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:18,896 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 21:51:18,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 21:51:18,896 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:18,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:18,898 INFO L85 PathProgramCache]: Analyzing trace with hash -657769224, now seen corresponding path program 1 times [2022-01-10 21:51:18,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:18,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920182606] [2022-01-10 21:51:18,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:18,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 21:51:19,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:19,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920182606] [2022-01-10 21:51:19,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920182606] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:19,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:19,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:51:19,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307516736] [2022-01-10 21:51:19,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:19,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:19,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:19,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:19,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:19,013 INFO L87 Difference]: Start difference. First operand 3328 states and 4311 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 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 21:51:19,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:19,589 INFO L93 Difference]: Finished difference Result 6622 states and 8577 transitions. [2022-01-10 21:51:19,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:19,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2022-01-10 21:51:19,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:19,603 INFO L225 Difference]: With dead ends: 6622 [2022-01-10 21:51:19,603 INFO L226 Difference]: Without dead ends: 3296 [2022-01-10 21:51:19,609 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 21:51:19,613 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 329 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:19,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 21:51:19,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2022-01-10 21:51:19,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 3296. [2022-01-10 21:51:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3296 states, 3295 states have (on average 1.2564491654021244) internal successors, (4140), 3295 states have internal predecessors, (4140), 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 21:51:19,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3296 states to 3296 states and 4140 transitions. [2022-01-10 21:51:19,679 INFO L78 Accepts]: Start accepts. Automaton has 3296 states and 4140 transitions. Word has length 178 [2022-01-10 21:51:19,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:19,681 INFO L470 AbstractCegarLoop]: Abstraction has 3296 states and 4140 transitions. [2022-01-10 21:51:19,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 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 21:51:19,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3296 states and 4140 transitions. [2022-01-10 21:51:19,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-10 21:51:19,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:19,695 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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] [2022-01-10 21:51:19,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 21:51:19,695 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:19,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:19,696 INFO L85 PathProgramCache]: Analyzing trace with hash 111856026, now seen corresponding path program 1 times [2022-01-10 21:51:19,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:19,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344285553] [2022-01-10 21:51:19,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:19,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 21:51:19,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:19,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344285553] [2022-01-10 21:51:19,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344285553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:19,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:19,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:51:19,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290782926] [2022-01-10 21:51:19,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:19,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:19,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:19,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:19,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:19,838 INFO L87 Difference]: Start difference. First operand 3296 states and 4140 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 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 21:51:20,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:20,839 INFO L93 Difference]: Finished difference Result 8217 states and 10576 transitions. [2022-01-10 21:51:20,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:20,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 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 192 [2022-01-10 21:51:20,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:20,857 INFO L225 Difference]: With dead ends: 8217 [2022-01-10 21:51:20,857 INFO L226 Difference]: Without dead ends: 4923 [2022-01-10 21:51:20,863 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 21:51:20,865 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 209 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:20,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 135 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:51:20,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4923 states. [2022-01-10 21:51:20,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4923 to 4920. [2022-01-10 21:51:20,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4920 states, 4919 states have (on average 1.2238259808904248) internal successors, (6020), 4919 states have internal predecessors, (6020), 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 21:51:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4920 states to 4920 states and 6020 transitions. [2022-01-10 21:51:20,948 INFO L78 Accepts]: Start accepts. Automaton has 4920 states and 6020 transitions. Word has length 192 [2022-01-10 21:51:20,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:20,949 INFO L470 AbstractCegarLoop]: Abstraction has 4920 states and 6020 transitions. [2022-01-10 21:51:20,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 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 21:51:20,949 INFO L276 IsEmpty]: Start isEmpty. Operand 4920 states and 6020 transitions. [2022-01-10 21:51:20,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-10 21:51:20,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:20,954 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:51:20,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 21:51:20,955 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:20,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:20,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1339776267, now seen corresponding path program 1 times [2022-01-10 21:51:20,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:20,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381143209] [2022-01-10 21:51:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:20,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:51:21,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:21,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381143209] [2022-01-10 21:51:21,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381143209] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:21,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:21,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:51:21,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638299902] [2022-01-10 21:51:21,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:21,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:21,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:21,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:21,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:21,118 INFO L87 Difference]: Start difference. First operand 4920 states and 6020 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 21:51:22,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:22,094 INFO L93 Difference]: Finished difference Result 12294 states and 14999 transitions. [2022-01-10 21:51:22,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:22,095 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 192 [2022-01-10 21:51:22,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:22,118 INFO L225 Difference]: With dead ends: 12294 [2022-01-10 21:51:22,118 INFO L226 Difference]: Without dead ends: 7376 [2022-01-10 21:51:22,125 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 21:51:22,128 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 197 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:22,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 68 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:51:22,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7376 states. [2022-01-10 21:51:22,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7376 to 7375. [2022-01-10 21:51:22,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7375 states, 7374 states have (on average 1.207892595606184) internal successors, (8907), 7374 states have internal predecessors, (8907), 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 21:51:22,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7375 states to 7375 states and 8907 transitions. [2022-01-10 21:51:22,242 INFO L78 Accepts]: Start accepts. Automaton has 7375 states and 8907 transitions. Word has length 192 [2022-01-10 21:51:22,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:22,242 INFO L470 AbstractCegarLoop]: Abstraction has 7375 states and 8907 transitions. [2022-01-10 21:51:22,242 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 21:51:22,242 INFO L276 IsEmpty]: Start isEmpty. Operand 7375 states and 8907 transitions. [2022-01-10 21:51:22,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-10 21:51:22,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:22,253 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] [2022-01-10 21:51:22,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 21:51:22,253 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:22,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:22,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1896000861, now seen corresponding path program 1 times [2022-01-10 21:51:22,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:22,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291427379] [2022-01-10 21:51:22,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:22,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:22,423 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 21:51:22,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:22,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291427379] [2022-01-10 21:51:22,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291427379] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:51:22,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128510358] [2022-01-10 21:51:22,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:22,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:51:22,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:51:22,431 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 21:51:22,462 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 21:51:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:23,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 6069 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 21:51:23,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:51:23,555 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 21:51:23,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 21:51:23,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128510358] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:23,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 21:51:23,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 21:51:23,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720516275] [2022-01-10 21:51:23,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:23,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:23,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:23,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:23,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:51:23,558 INFO L87 Difference]: Start difference. First operand 7375 states and 8907 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 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 21:51:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:24,565 INFO L93 Difference]: Finished difference Result 21688 states and 26246 transitions. [2022-01-10 21:51:24,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:24,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 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 199 [2022-01-10 21:51:24,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:24,602 INFO L225 Difference]: With dead ends: 21688 [2022-01-10 21:51:24,602 INFO L226 Difference]: Without dead ends: 14315 [2022-01-10 21:51:24,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 198 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 21:51:24,614 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 80 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:24,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 179 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:51:24,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14315 states. [2022-01-10 21:51:24,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14315 to 12669. [2022-01-10 21:51:24,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12669 states, 12668 states have (on average 1.2197663403852226) internal successors, (15452), 12668 states have internal predecessors, (15452), 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 21:51:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12669 states to 12669 states and 15452 transitions. [2022-01-10 21:51:24,881 INFO L78 Accepts]: Start accepts. Automaton has 12669 states and 15452 transitions. Word has length 199 [2022-01-10 21:51:24,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:24,881 INFO L470 AbstractCegarLoop]: Abstraction has 12669 states and 15452 transitions. [2022-01-10 21:51:24,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 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 21:51:24,882 INFO L276 IsEmpty]: Start isEmpty. Operand 12669 states and 15452 transitions. [2022-01-10 21:51:24,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-01-10 21:51:24,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:24,900 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:51:24,931 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 21:51:25,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:51:25,128 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:25,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:25,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1433623452, now seen corresponding path program 1 times [2022-01-10 21:51:25,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:25,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158228287] [2022-01-10 21:51:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:25,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-10 21:51:25,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:25,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158228287] [2022-01-10 21:51:25,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158228287] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:25,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:25,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:25,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736258519] [2022-01-10 21:51:25,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:25,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:51:25,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:25,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:51:25,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:51:25,357 INFO L87 Difference]: Start difference. First operand 12669 states and 15452 transitions. Second operand has 4 states, 4 states have (on average 59.75) internal successors, (239), 3 states have internal predecessors, (239), 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 21:51:26,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:26,739 INFO L93 Difference]: Finished difference Result 40820 states and 50515 transitions. [2022-01-10 21:51:26,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:51:26,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 59.75) internal successors, (239), 3 states have internal predecessors, (239), 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 257 [2022-01-10 21:51:26,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:26,795 INFO L225 Difference]: With dead ends: 40820 [2022-01-10 21:51:26,795 INFO L226 Difference]: Without dead ends: 28153 [2022-01-10 21:51:26,813 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 21:51:26,816 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 443 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:26,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 439 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 21:51:26,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28153 states. [2022-01-10 21:51:27,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28153 to 26928. [2022-01-10 21:51:27,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26928 states, 26927 states have (on average 1.234448694618784) internal successors, (33240), 26927 states have internal predecessors, (33240), 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 21:51:27,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26928 states to 26928 states and 33240 transitions. [2022-01-10 21:51:27,357 INFO L78 Accepts]: Start accepts. Automaton has 26928 states and 33240 transitions. Word has length 257 [2022-01-10 21:51:27,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:27,358 INFO L470 AbstractCegarLoop]: Abstraction has 26928 states and 33240 transitions. [2022-01-10 21:51:27,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.75) internal successors, (239), 3 states have internal predecessors, (239), 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 21:51:27,358 INFO L276 IsEmpty]: Start isEmpty. Operand 26928 states and 33240 transitions. [2022-01-10 21:51:27,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-01-10 21:51:27,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:27,393 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 21:51:27,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 21:51:27,393 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:27,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:27,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1850066496, now seen corresponding path program 1 times [2022-01-10 21:51:27,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:27,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980725624] [2022-01-10 21:51:27,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:27,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:51:27,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:27,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980725624] [2022-01-10 21:51:27,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980725624] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:27,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:27,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:27,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637814302] [2022-01-10 21:51:27,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:27,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:27,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:27,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:27,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:27,721 INFO L87 Difference]: Start difference. First operand 26928 states and 33240 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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 21:51:28,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:28,739 INFO L93 Difference]: Finished difference Result 48950 states and 60023 transitions. [2022-01-10 21:51:28,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:28,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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 270 [2022-01-10 21:51:28,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:28,777 INFO L225 Difference]: With dead ends: 48950 [2022-01-10 21:51:28,777 INFO L226 Difference]: Without dead ends: 22024 [2022-01-10 21:51:28,809 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 21:51:28,809 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 229 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:28,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 343 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:51:28,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22024 states. [2022-01-10 21:51:29,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22024 to 22016. [2022-01-10 21:51:29,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22016 states, 22015 states have (on average 1.187962752668635) internal successors, (26153), 22015 states have internal predecessors, (26153), 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 21:51:29,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22016 states to 22016 states and 26153 transitions. [2022-01-10 21:51:29,158 INFO L78 Accepts]: Start accepts. Automaton has 22016 states and 26153 transitions. Word has length 270 [2022-01-10 21:51:29,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:29,158 INFO L470 AbstractCegarLoop]: Abstraction has 22016 states and 26153 transitions. [2022-01-10 21:51:29,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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 21:51:29,158 INFO L276 IsEmpty]: Start isEmpty. Operand 22016 states and 26153 transitions. [2022-01-10 21:51:29,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-01-10 21:51:29,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:29,179 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:51:29,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 21:51:29,180 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:29,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:29,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1568055913, now seen corresponding path program 1 times [2022-01-10 21:51:29,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:29,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935511175] [2022-01-10 21:51:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:29,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-10 21:51:29,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:29,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935511175] [2022-01-10 21:51:29,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935511175] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:29,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:29,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:29,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539428333] [2022-01-10 21:51:29,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:29,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:51:29,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:29,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:51:29,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:51:29,451 INFO L87 Difference]: Start difference. First operand 22016 states and 26153 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 3 states have internal predecessors, (207), 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 21:51:30,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:30,665 INFO L93 Difference]: Finished difference Result 50981 states and 60607 transitions. [2022-01-10 21:51:30,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:51:30,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 3 states have internal predecessors, (207), 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 286 [2022-01-10 21:51:30,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:30,707 INFO L225 Difference]: With dead ends: 50981 [2022-01-10 21:51:30,707 INFO L226 Difference]: Without dead ends: 28967 [2022-01-10 21:51:30,729 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 21:51:30,730 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 736 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:30,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 275 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 21:51:30,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28967 states. [2022-01-10 21:51:31,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28967 to 28961. [2022-01-10 21:51:31,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28961 states, 28960 states have (on average 1.1883977900552487) internal successors, (34416), 28960 states have internal predecessors, (34416), 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 21:51:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28961 states to 28961 states and 34416 transitions. [2022-01-10 21:51:31,121 INFO L78 Accepts]: Start accepts. Automaton has 28961 states and 34416 transitions. Word has length 286 [2022-01-10 21:51:31,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:31,121 INFO L470 AbstractCegarLoop]: Abstraction has 28961 states and 34416 transitions. [2022-01-10 21:51:31,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 3 states have internal predecessors, (207), 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 21:51:31,121 INFO L276 IsEmpty]: Start isEmpty. Operand 28961 states and 34416 transitions. [2022-01-10 21:51:31,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-01-10 21:51:31,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:31,145 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:51:31,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 21:51:31,146 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:31,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:31,146 INFO L85 PathProgramCache]: Analyzing trace with hash -311710287, now seen corresponding path program 1 times [2022-01-10 21:51:31,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:31,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533625080] [2022-01-10 21:51:31,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:31,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-10 21:51:31,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:31,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533625080] [2022-01-10 21:51:31,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533625080] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:31,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:31,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:51:31,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588364344] [2022-01-10 21:51:31,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:31,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:31,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:31,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:31,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:31,642 INFO L87 Difference]: Start difference. First operand 28961 states and 34416 transitions. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 2 states have internal predecessors, (250), 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 21:51:32,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:32,201 INFO L93 Difference]: Finished difference Result 85859 states and 102114 transitions. [2022-01-10 21:51:32,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:32,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 2 states have internal predecessors, (250), 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 293 [2022-01-10 21:51:32,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:32,293 INFO L225 Difference]: With dead ends: 85859 [2022-01-10 21:51:32,293 INFO L226 Difference]: Without dead ends: 56900 [2022-01-10 21:51:32,317 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 21:51:32,318 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 238 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:32,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 556 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 21:51:32,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56900 states. [2022-01-10 21:51:32,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56900 to 56898. [2022-01-10 21:51:32,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56898 states, 56897 states have (on average 1.1880942756208588) internal successors, (67599), 56897 states have internal predecessors, (67599), 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 21:51:33,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56898 states to 56898 states and 67599 transitions. [2022-01-10 21:51:33,184 INFO L78 Accepts]: Start accepts. Automaton has 56898 states and 67599 transitions. Word has length 293 [2022-01-10 21:51:33,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:33,185 INFO L470 AbstractCegarLoop]: Abstraction has 56898 states and 67599 transitions. [2022-01-10 21:51:33,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 2 states have internal predecessors, (250), 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 21:51:33,185 INFO L276 IsEmpty]: Start isEmpty. Operand 56898 states and 67599 transitions. [2022-01-10 21:51:33,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-01-10 21:51:33,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:33,210 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 21:51:33,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 21:51:33,211 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:33,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:33,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1722065923, now seen corresponding path program 1 times [2022-01-10 21:51:33,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:33,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134110694] [2022-01-10 21:51:33,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:33,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:33,636 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 21:51:33,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:33,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134110694] [2022-01-10 21:51:33,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134110694] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:33,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:33,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:33,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672414639] [2022-01-10 21:51:33,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:33,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:33,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:33,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:33,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:33,638 INFO L87 Difference]: Start difference. First operand 56898 states and 67599 transitions. Second operand has 3 states, 3 states have (on average 99.0) 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 21:51:34,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:34,846 INFO L93 Difference]: Finished difference Result 129304 states and 153398 transitions. [2022-01-10 21:51:34,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:34,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.0) 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 302 [2022-01-10 21:51:34,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:34,939 INFO L225 Difference]: With dead ends: 129304 [2022-01-10 21:51:34,940 INFO L226 Difference]: Without dead ends: 72408 [2022-01-10 21:51:34,986 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 21:51:34,987 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 88 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:34,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 339 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:51:35,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72408 states. [2022-01-10 21:51:35,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72408 to 71514. [2022-01-10 21:51:36,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71514 states, 71513 states have (on average 1.167256303049795) internal successors, (83474), 71513 states have internal predecessors, (83474), 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 21:51:36,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71514 states to 71514 states and 83474 transitions. [2022-01-10 21:51:36,096 INFO L78 Accepts]: Start accepts. Automaton has 71514 states and 83474 transitions. Word has length 302 [2022-01-10 21:51:36,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:36,096 INFO L470 AbstractCegarLoop]: Abstraction has 71514 states and 83474 transitions. [2022-01-10 21:51:36,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) 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 21:51:36,097 INFO L276 IsEmpty]: Start isEmpty. Operand 71514 states and 83474 transitions. [2022-01-10 21:51:36,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-01-10 21:51:36,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:36,325 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 21:51:36,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 21:51:36,325 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:36,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:36,326 INFO L85 PathProgramCache]: Analyzing trace with hash 143514427, now seen corresponding path program 1 times [2022-01-10 21:51:36,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:36,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228159952] [2022-01-10 21:51:36,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:36,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:51:36,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:36,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228159952] [2022-01-10 21:51:36,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228159952] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:36,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:36,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:36,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557525957] [2022-01-10 21:51:36,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:36,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:51:36,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:36,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:51:36,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:51:36,797 INFO L87 Difference]: Start difference. First operand 71514 states and 83474 transitions. Second operand has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 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 21:51:38,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:38,415 INFO L93 Difference]: Finished difference Result 147600 states and 172461 transitions. [2022-01-10 21:51:38,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:51:38,415 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 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 318 [2022-01-10 21:51:38,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:38,510 INFO L225 Difference]: With dead ends: 147600 [2022-01-10 21:51:38,510 INFO L226 Difference]: Without dead ends: 76088 [2022-01-10 21:51:38,556 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 21:51:38,556 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 278 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:38,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 93 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 21:51:38,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76088 states. [2022-01-10 21:51:39,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76088 to 68672. [2022-01-10 21:51:39,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68672 states, 68671 states have (on average 1.1678437768490337) internal successors, (80197), 68671 states have internal predecessors, (80197), 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 21:51:39,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68672 states to 68672 states and 80197 transitions. [2022-01-10 21:51:39,637 INFO L78 Accepts]: Start accepts. Automaton has 68672 states and 80197 transitions. Word has length 318 [2022-01-10 21:51:39,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:39,637 INFO L470 AbstractCegarLoop]: Abstraction has 68672 states and 80197 transitions. [2022-01-10 21:51:39,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 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 21:51:39,637 INFO L276 IsEmpty]: Start isEmpty. Operand 68672 states and 80197 transitions. [2022-01-10 21:51:39,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-01-10 21:51:39,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:39,670 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 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] [2022-01-10 21:51:39,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 21:51:39,670 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:39,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:39,671 INFO L85 PathProgramCache]: Analyzing trace with hash -938680413, now seen corresponding path program 1 times [2022-01-10 21:51:39,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:39,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636596876] [2022-01-10 21:51:39,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:39,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-01-10 21:51:39,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:39,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636596876] [2022-01-10 21:51:39,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636596876] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:39,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:39,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:39,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574270736] [2022-01-10 21:51:39,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:39,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:51:39,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:39,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:51:39,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:51:39,874 INFO L87 Difference]: Start difference. First operand 68672 states and 80197 transitions. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:41,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:41,766 INFO L93 Difference]: Finished difference Result 201540 states and 235736 transitions. [2022-01-10 21:51:41,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 21:51:41,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 325 [2022-01-10 21:51:41,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:41,939 INFO L225 Difference]: With dead ends: 201540 [2022-01-10 21:51:41,940 INFO L226 Difference]: Without dead ends: 132870 [2022-01-10 21:51:41,971 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 21:51:41,971 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 489 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:41,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 478 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 21:51:42,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132870 states. [2022-01-10 21:51:43,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132870 to 131998. [2022-01-10 21:51:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131998 states, 131997 states have (on average 1.1657234634120472) internal successors, (153872), 131997 states have internal predecessors, (153872), 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 21:51:43,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131998 states to 131998 states and 153872 transitions. [2022-01-10 21:51:43,923 INFO L78 Accepts]: Start accepts. Automaton has 131998 states and 153872 transitions. Word has length 325 [2022-01-10 21:51:43,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:43,923 INFO L470 AbstractCegarLoop]: Abstraction has 131998 states and 153872 transitions. [2022-01-10 21:51:43,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:51:43,923 INFO L276 IsEmpty]: Start isEmpty. Operand 131998 states and 153872 transitions. [2022-01-10 21:51:43,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-01-10 21:51:43,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:43,985 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 21:51:43,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 21:51:43,985 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:43,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:43,986 INFO L85 PathProgramCache]: Analyzing trace with hash 610506623, now seen corresponding path program 1 times [2022-01-10 21:51:43,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:43,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847232550] [2022-01-10 21:51:43,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:43,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 299 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:51:44,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:44,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847232550] [2022-01-10 21:51:44,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847232550] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:44,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:44,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:44,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684887794] [2022-01-10 21:51:44,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:44,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:51:44,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:44,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:51:44,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:51:44,292 INFO L87 Difference]: Start difference. First operand 131998 states and 153872 transitions. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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 21:51:45,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:45,866 INFO L93 Difference]: Finished difference Result 253127 states and 294542 transitions. [2022-01-10 21:51:45,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:51:45,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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 356 [2022-01-10 21:51:45,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:46,057 INFO L225 Difference]: With dead ends: 253127 [2022-01-10 21:51:46,058 INFO L226 Difference]: Without dead ends: 121131 [2022-01-10 21:51:46,142 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 21:51:46,143 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 151 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:46,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 327 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 21:51:46,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121131 states. [2022-01-10 21:51:47,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121131 to 120711. [2022-01-10 21:51:47,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120711 states, 120710 states have (on average 1.129417612459614) internal successors, (136332), 120710 states have internal predecessors, (136332), 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 21:51:48,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120711 states to 120711 states and 136332 transitions. [2022-01-10 21:51:48,044 INFO L78 Accepts]: Start accepts. Automaton has 120711 states and 136332 transitions. Word has length 356 [2022-01-10 21:51:48,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:48,045 INFO L470 AbstractCegarLoop]: Abstraction has 120711 states and 136332 transitions. [2022-01-10 21:51:48,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 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 21:51:48,045 INFO L276 IsEmpty]: Start isEmpty. Operand 120711 states and 136332 transitions. [2022-01-10 21:51:48,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-01-10 21:51:48,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:48,114 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 21:51:48,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-10 21:51:48,115 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:48,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:48,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1356287646, now seen corresponding path program 1 times [2022-01-10 21:51:48,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:48,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904741205] [2022-01-10 21:51:48,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:48,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-01-10 21:51:48,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:48,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904741205] [2022-01-10 21:51:48,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904741205] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:48,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:48,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 21:51:48,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716259670] [2022-01-10 21:51:48,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:48,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 21:51:48,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:48,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 21:51:48,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:51:48,460 INFO L87 Difference]: Start difference. First operand 120711 states and 136332 transitions. Second operand has 5 states, 5 states have (on average 59.6) internal successors, (298), 4 states have internal predecessors, (298), 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 21:51:51,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:51:51,332 INFO L93 Difference]: Finished difference Result 405339 states and 456364 transitions. [2022-01-10 21:51:51,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 21:51:51,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 59.6) internal successors, (298), 4 states have internal predecessors, (298), 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 383 [2022-01-10 21:51:51,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:51:51,786 INFO L225 Difference]: With dead ends: 405339 [2022-01-10 21:51:51,786 INFO L226 Difference]: Without dead ends: 284630 [2022-01-10 21:51:51,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 21:51:51,852 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 640 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-10 21:51:51,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [640 Valid, 803 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-10 21:51:52,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284630 states. [2022-01-10 21:51:55,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284630 to 284598. [2022-01-10 21:51:55,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284598 states, 284597 states have (on average 1.123669610009944) internal successors, (319793), 284597 states have internal predecessors, (319793), 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 21:51:56,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284598 states to 284598 states and 319793 transitions. [2022-01-10 21:51:56,135 INFO L78 Accepts]: Start accepts. Automaton has 284598 states and 319793 transitions. Word has length 383 [2022-01-10 21:51:56,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:51:56,135 INFO L470 AbstractCegarLoop]: Abstraction has 284598 states and 319793 transitions. [2022-01-10 21:51:56,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.6) internal successors, (298), 4 states have internal predecessors, (298), 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 21:51:56,135 INFO L276 IsEmpty]: Start isEmpty. Operand 284598 states and 319793 transitions. [2022-01-10 21:51:56,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2022-01-10 21:51:56,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:51:56,592 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:51:56,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 21:51:56,593 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:51:56,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:51:56,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1812510881, now seen corresponding path program 1 times [2022-01-10 21:51:56,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:51:56,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702349105] [2022-01-10 21:51:56,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:51:56,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:51:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:51:56,798 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2022-01-10 21:51:56,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:51:56,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702349105] [2022-01-10 21:51:56,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702349105] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:51:56,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:51:56,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:51:56,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072670661] [2022-01-10 21:51:56,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:51:56,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 21:51:56,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:51:56,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 21:51:56,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 21:51:56,801 INFO L87 Difference]: Start difference. First operand 284598 states and 319793 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 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)