/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 16:02:59,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 16:02:59,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 16:02:59,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 16:02:59,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 16:02:59,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 16:02:59,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 16:02:59,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 16:02:59,843 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 16:02:59,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 16:02:59,846 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 16:02:59,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 16:02:59,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 16:02:59,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 16:02:59,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 16:02:59,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 16:02:59,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 16:02:59,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 16:02:59,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 16:02:59,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 16:02:59,862 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 16:02:59,863 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 16:02:59,863 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 16:02:59,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 16:02:59,864 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 16:02:59,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 16:02:59,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 16:02:59,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 16:02:59,865 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_LAZY.epf [2022-01-10 16:02:59,891 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 16:02:59,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 16:02:59,892 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 16:02:59,892 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 16:02:59,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 16:02:59,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 16:02:59,893 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 16:02:59,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 16:02:59,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 16:02:59,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 16:02:59,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 16:02:59,894 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 16:02:59,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 16:02:59,894 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 16:02:59,894 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 16:02:59,894 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 16:02:59,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 16:02:59,894 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 16:02:59,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 16:02:59,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 16:02:59,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 16:02:59,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 16:02:59,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 16:02:59,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 16:02:59,896 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 16:02:59,896 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 16:02:59,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 16:02:59,896 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 16:02:59,896 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 16:02:59,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 16:02:59,896 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 16:02:59,896 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 16:02:59,897 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 16:02:59,897 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_LAZY WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 16:03:00,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 16:03:00,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 16:03:00,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 16:03:00,093 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 16:03:00,094 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 16:03:00,095 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label59.c [2022-01-10 16:03:00,149 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aeb162b89/49bc92cfb23e4dfcbad61f41d75f4690/FLAG9bd04e8dd [2022-01-10 16:03:00,552 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 16:03:00,552 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label59.c [2022-01-10 16:03:00,564 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aeb162b89/49bc92cfb23e4dfcbad61f41d75f4690/FLAG9bd04e8dd [2022-01-10 16:03:00,869 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aeb162b89/49bc92cfb23e4dfcbad61f41d75f4690 [2022-01-10 16:03:00,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 16:03:00,871 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 16:03:00,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 16:03:00,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 16:03:00,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 16:03:00,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:03:00" (1/1) ... [2022-01-10 16:03:00,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d2e5f22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:00, skipping insertion in model container [2022-01-10 16:03:00,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 04:03:00" (1/1) ... [2022-01-10 16:03:00,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 16:03:00,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 16:03:01,408 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_label59.c[57711,57724] [2022-01-10 16:03:01,437 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 16:03:01,446 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 16:03:01,574 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_label59.c[57711,57724] [2022-01-10 16:03:01,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 16:03:01,598 INFO L208 MainTranslator]: Completed translation [2022-01-10 16:03:01,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:01 WrapperNode [2022-01-10 16:03:01,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 16:03:01,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 16:03:01,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 16:03:01,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 16:03:01,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:01" (1/1) ... [2022-01-10 16:03:01,629 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:01" (1/1) ... [2022-01-10 16:03:01,702 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2022-01-10 16:03:01,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 16:03:01,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 16:03:01,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 16:03:01,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 16:03:01,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:01" (1/1) ... [2022-01-10 16:03:01,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:01" (1/1) ... [2022-01-10 16:03:01,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:01" (1/1) ... [2022-01-10 16:03:01,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:01" (1/1) ... [2022-01-10 16:03:01,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:01" (1/1) ... [2022-01-10 16:03:01,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:01" (1/1) ... [2022-01-10 16:03:01,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:01" (1/1) ... [2022-01-10 16:03:01,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 16:03:01,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 16:03:01,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 16:03:01,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 16:03:01,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:01" (1/1) ... [2022-01-10 16:03:01,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 16:03:01,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 16:03:01,831 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 16:03:01,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 16:03:01,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 16:03:01,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 16:03:01,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 16:03:01,851 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 16:03:01,917 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 16:03:01,919 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 16:03:03,353 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 16:03:03,360 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 16:03:03,360 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 16:03:03,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:03:03 BoogieIcfgContainer [2022-01-10 16:03:03,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 16:03:03,363 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 16:03:03,363 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 16:03:03,364 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 16:03:03,369 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:03:03" (1/1) ... [2022-01-10 16:03:03,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 04:03:03 BasicIcfg [2022-01-10 16:03:03,758 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 16:03:03,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 16:03:03,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 16:03:03,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 16:03:03,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 04:03:00" (1/4) ... [2022-01-10 16:03:03,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f73420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:03:03, skipping insertion in model container [2022-01-10 16:03:03,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 04:03:01" (2/4) ... [2022-01-10 16:03:03,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f73420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 04:03:03, skipping insertion in model container [2022-01-10 16:03:03,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 04:03:03" (3/4) ... [2022-01-10 16:03:03,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f73420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 04:03:03, skipping insertion in model container [2022-01-10 16:03:03,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 04:03:03" (4/4) ... [2022-01-10 16:03:03,764 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label59.cTransformedIcfg [2022-01-10 16:03:03,768 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 16:03:03,768 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 16:03:03,808 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 16:03:03,814 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 16:03:03,814 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 16:03:03,834 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 16:03:03,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-10 16:03:03,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:03:03,848 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 16:03:03,849 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:03:03,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:03:03,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1840778933, now seen corresponding path program 1 times [2022-01-10 16:03:03,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:03:03,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222694779] [2022-01-10 16:03:03,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:03:03,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:03:04,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:03:04,530 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 16:03:04,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:03:04,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222694779] [2022-01-10 16:03:04,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222694779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:03:04,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:03:04,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 16:03:04,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283341425] [2022-01-10 16:03:04,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:03:04,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:03:04,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:03:04,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:03:04,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:03:04,565 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 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:05,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:03:05,668 INFO L93 Difference]: Finished difference Result 864 states and 1514 transitions. [2022-01-10 16:03:05,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:03:05,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2022-01-10 16:03:05,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:03:05,679 INFO L225 Difference]: With dead ends: 864 [2022-01-10 16:03:05,679 INFO L226 Difference]: Without dead ends: 468 [2022-01-10 16:03:05,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:03:05,686 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 104 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 16:03:05,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 165 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 16:03:05,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-10 16:03:05,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2022-01-10 16:03:05,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6269315673289184) internal successors, (737), 453 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:05,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 737 transitions. [2022-01-10 16:03:05,749 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 737 transitions. Word has length 174 [2022-01-10 16:03:05,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:03:05,750 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 737 transitions. [2022-01-10 16:03:05,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:05,750 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 737 transitions. [2022-01-10 16:03:05,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-10 16:03:05,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:03:05,752 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 16:03:05,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 16:03:05,753 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:03:05,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:03:05,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1046556577, now seen corresponding path program 1 times [2022-01-10 16:03:05,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:03:05,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976913037] [2022-01-10 16:03:05,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:03:05,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:03:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:03:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 16:03:05,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:03:05,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976913037] [2022-01-10 16:03:05,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976913037] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:03:05,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:03:05,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 16:03:05,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523337448] [2022-01-10 16:03:05,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:03:05,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:03:05,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:03:05,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:03:05,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:03:05,867 INFO L87 Difference]: Start difference. First operand 454 states and 737 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:06,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:03:06,197 INFO L93 Difference]: Finished difference Result 1345 states and 2190 transitions. [2022-01-10 16:03:06,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:03:06,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 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 179 [2022-01-10 16:03:06,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:03:06,209 INFO L225 Difference]: With dead ends: 1345 [2022-01-10 16:03:06,209 INFO L226 Difference]: Without dead ends: 893 [2022-01-10 16:03:06,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:03:06,211 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 360 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 16:03:06,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 555 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 16:03:06,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-01-10 16:03:06,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 891. [2022-01-10 16:03:06,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 1.6258426966292134) internal successors, (1447), 890 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:06,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1447 transitions. [2022-01-10 16:03:06,233 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1447 transitions. Word has length 179 [2022-01-10 16:03:06,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:03:06,233 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 1447 transitions. [2022-01-10 16:03:06,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:06,233 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1447 transitions. [2022-01-10 16:03:06,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-10 16:03:06,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:03:06,239 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 16:03:06,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 16:03:06,240 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:03:06,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:03:06,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2141794684, now seen corresponding path program 1 times [2022-01-10 16:03:06,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:03:06,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601840285] [2022-01-10 16:03:06,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:03:06,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:03:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:03:06,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 16:03:06,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:03:06,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601840285] [2022-01-10 16:03:06,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601840285] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:03:06,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:03:06,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 16:03:06,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25092589] [2022-01-10 16:03:06,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:03:06,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:03:06,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:03:06,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:03:06,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:03:06,375 INFO L87 Difference]: Start difference. First operand 891 states and 1447 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:07,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:03:07,292 INFO L93 Difference]: Finished difference Result 2620 states and 4271 transitions. [2022-01-10 16:03:07,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:03:07,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2022-01-10 16:03:07,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:03:07,298 INFO L225 Difference]: With dead ends: 2620 [2022-01-10 16:03:07,298 INFO L226 Difference]: Without dead ends: 1731 [2022-01-10 16:03:07,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:03:07,300 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 252 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 16:03:07,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 162 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 16:03:07,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2022-01-10 16:03:07,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1726. [2022-01-10 16:03:07,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 1.5217391304347827) internal successors, (2625), 1725 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:07,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2625 transitions. [2022-01-10 16:03:07,330 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2625 transitions. Word has length 180 [2022-01-10 16:03:07,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:03:07,331 INFO L470 AbstractCegarLoop]: Abstraction has 1726 states and 2625 transitions. [2022-01-10 16:03:07,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:07,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2625 transitions. [2022-01-10 16:03:07,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-10 16:03:07,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:03:07,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 16:03:07,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 16:03:07,334 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:03:07,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:03:07,335 INFO L85 PathProgramCache]: Analyzing trace with hash 92178073, now seen corresponding path program 1 times [2022-01-10 16:03:07,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:03:07,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096449746] [2022-01-10 16:03:07,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:03:07,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:03:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:03:07,421 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 16:03:07,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:03:07,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096449746] [2022-01-10 16:03:07,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096449746] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:03:07,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:03:07,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 16:03:07,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839745922] [2022-01-10 16:03:07,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:03:07,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:03:07,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:03:07,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:03:07,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:03:07,423 INFO L87 Difference]: Start difference. First operand 1726 states and 2625 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:08,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:03:08,328 INFO L93 Difference]: Finished difference Result 5105 states and 7793 transitions. [2022-01-10 16:03:08,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:03:08,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 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 182 [2022-01-10 16:03:08,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:03:08,340 INFO L225 Difference]: With dead ends: 5105 [2022-01-10 16:03:08,340 INFO L226 Difference]: Without dead ends: 3381 [2022-01-10 16:03:08,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:03:08,350 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 16:03:08,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 16:03:08,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3381 states. [2022-01-10 16:03:08,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3381 to 3352. [2022-01-10 16:03:08,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 3351 states have (on average 1.4971650253655626) internal successors, (5017), 3351 states have internal predecessors, (5017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:08,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 5017 transitions. [2022-01-10 16:03:08,414 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 5017 transitions. Word has length 182 [2022-01-10 16:03:08,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:03:08,414 INFO L470 AbstractCegarLoop]: Abstraction has 3352 states and 5017 transitions. [2022-01-10 16:03:08,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:08,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 5017 transitions. [2022-01-10 16:03:08,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-01-10 16:03:08,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:03:08,419 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 16:03:08,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 16:03:08,420 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:03:08,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:03:08,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1043551721, now seen corresponding path program 1 times [2022-01-10 16:03:08,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:03:08,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854854108] [2022-01-10 16:03:08,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:03:08,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:03:08,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:03:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 16:03:08,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:03:08,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854854108] [2022-01-10 16:03:08,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854854108] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:03:08,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:03:08,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 16:03:08,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862134424] [2022-01-10 16:03:08,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:03:08,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:03:08,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:03:08,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:03:08,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:03:08,515 INFO L87 Difference]: Start difference. First operand 3352 states and 5017 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:09,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:03:09,402 INFO L93 Difference]: Finished difference Result 8343 states and 12446 transitions. [2022-01-10 16:03:09,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:03:09,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 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 184 [2022-01-10 16:03:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:03:09,418 INFO L225 Difference]: With dead ends: 8343 [2022-01-10 16:03:09,418 INFO L226 Difference]: Without dead ends: 4993 [2022-01-10 16:03:09,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:03:09,423 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 236 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 16:03:09,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 115 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 16:03:09,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4993 states. [2022-01-10 16:03:09,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4993 to 4991. [2022-01-10 16:03:09,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4991 states, 4990 states have (on average 1.4643286573146292) internal successors, (7307), 4990 states have internal predecessors, (7307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:09,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4991 states to 4991 states and 7307 transitions. [2022-01-10 16:03:09,501 INFO L78 Accepts]: Start accepts. Automaton has 4991 states and 7307 transitions. Word has length 184 [2022-01-10 16:03:09,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:03:09,501 INFO L470 AbstractCegarLoop]: Abstraction has 4991 states and 7307 transitions. [2022-01-10 16:03:09,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:09,502 INFO L276 IsEmpty]: Start isEmpty. Operand 4991 states and 7307 transitions. [2022-01-10 16:03:09,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-10 16:03:09,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:03:09,508 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 16:03:09,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 16:03:09,508 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:03:09,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:03:09,509 INFO L85 PathProgramCache]: Analyzing trace with hash -854920447, now seen corresponding path program 1 times [2022-01-10 16:03:09,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:03:09,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406434987] [2022-01-10 16:03:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:03:09,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:03:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:03:09,729 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 16:03:09,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:03:09,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406434987] [2022-01-10 16:03:09,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406434987] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:03:09,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:03:09,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 16:03:09,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152817721] [2022-01-10 16:03:09,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:03:09,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:03:09,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:03:09,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:03:09,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:03:09,731 INFO L87 Difference]: Start difference. First operand 4991 states and 7307 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:10,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:03:10,683 INFO L93 Difference]: Finished difference Result 14856 states and 21765 transitions. [2022-01-10 16:03:10,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:03:10,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2022-01-10 16:03:10,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:03:10,710 INFO L225 Difference]: With dead ends: 14856 [2022-01-10 16:03:10,710 INFO L226 Difference]: Without dead ends: 9867 [2022-01-10 16:03:10,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:03:10,718 INFO L933 BasicCegarLoop]: 399 mSDtfsCounter, 58 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 16:03:10,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 428 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 16:03:10,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9867 states. [2022-01-10 16:03:10,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9867 to 8240. [2022-01-10 16:03:10,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8240 states, 8239 states have (on average 1.3322005097706033) internal successors, (10976), 8239 states have internal predecessors, (10976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:10,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8240 states to 8240 states and 10976 transitions. [2022-01-10 16:03:10,851 INFO L78 Accepts]: Start accepts. Automaton has 8240 states and 10976 transitions. Word has length 189 [2022-01-10 16:03:10,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:03:10,852 INFO L470 AbstractCegarLoop]: Abstraction has 8240 states and 10976 transitions. [2022-01-10 16:03:10,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:10,852 INFO L276 IsEmpty]: Start isEmpty. Operand 8240 states and 10976 transitions. [2022-01-10 16:03:10,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-10 16:03:10,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:03:10,863 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 16:03:10,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 16:03:10,864 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:03:10,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:03:10,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1313012017, now seen corresponding path program 1 times [2022-01-10 16:03:10,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:03:10,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095330549] [2022-01-10 16:03:10,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:03:10,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:03:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:03:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 16:03:10,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:03:10,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095330549] [2022-01-10 16:03:10,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095330549] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:03:10,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:03:10,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 16:03:10,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468303144] [2022-01-10 16:03:10,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:03:10,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:03:10,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:03:10,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:03:10,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:03:10,979 INFO L87 Difference]: Start difference. First operand 8240 states and 10976 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:12,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:03:12,010 INFO L93 Difference]: Finished difference Result 20947 states and 28496 transitions. [2022-01-10 16:03:12,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:03:12,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 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 193 [2022-01-10 16:03:12,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:03:12,041 INFO L225 Difference]: With dead ends: 20947 [2022-01-10 16:03:12,041 INFO L226 Difference]: Without dead ends: 12709 [2022-01-10 16:03:12,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:03:12,052 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 227 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 16:03:12,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 167 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 16:03:12,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12709 states. [2022-01-10 16:03:12,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12709 to 12706. [2022-01-10 16:03:12,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12706 states, 12705 states have (on average 1.2754820936639117) internal successors, (16205), 12705 states have internal predecessors, (16205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:12,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12706 states to 12706 states and 16205 transitions. [2022-01-10 16:03:12,241 INFO L78 Accepts]: Start accepts. Automaton has 12706 states and 16205 transitions. Word has length 193 [2022-01-10 16:03:12,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:03:12,241 INFO L470 AbstractCegarLoop]: Abstraction has 12706 states and 16205 transitions. [2022-01-10 16:03:12,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:12,242 INFO L276 IsEmpty]: Start isEmpty. Operand 12706 states and 16205 transitions. [2022-01-10 16:03:12,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-10 16:03:12,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:03:12,255 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 16:03:12,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 16:03:12,255 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:03:12,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:03:12,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2081781523, now seen corresponding path program 1 times [2022-01-10 16:03:12,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:03:12,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52184951] [2022-01-10 16:03:12,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:03:12,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:03:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:03:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 16:03:12,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:03:12,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52184951] [2022-01-10 16:03:12,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52184951] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:03:12,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:03:12,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 16:03:12,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002328235] [2022-01-10 16:03:12,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:03:12,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:03:12,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:03:12,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:03:12,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:03:12,349 INFO L87 Difference]: Start difference. First operand 12706 states and 16205 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:13,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:03:13,254 INFO L93 Difference]: Finished difference Result 25413 states and 32414 transitions. [2022-01-10 16:03:13,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:03:13,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2022-01-10 16:03:13,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:03:13,285 INFO L225 Difference]: With dead ends: 25413 [2022-01-10 16:03:13,285 INFO L226 Difference]: Without dead ends: 12709 [2022-01-10 16:03:13,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:03:13,297 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 258 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 16:03:13,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 95 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 16:03:13,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12709 states. [2022-01-10 16:03:13,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12709 to 12706. [2022-01-10 16:03:13,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12706 states, 12705 states have (on average 1.2541519086973631) internal successors, (15934), 12705 states have internal predecessors, (15934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:13,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12706 states to 12706 states and 15934 transitions. [2022-01-10 16:03:13,470 INFO L78 Accepts]: Start accepts. Automaton has 12706 states and 15934 transitions. Word has length 201 [2022-01-10 16:03:13,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:03:13,472 INFO L470 AbstractCegarLoop]: Abstraction has 12706 states and 15934 transitions. [2022-01-10 16:03:13,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:13,472 INFO L276 IsEmpty]: Start isEmpty. Operand 12706 states and 15934 transitions. [2022-01-10 16:03:13,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-10 16:03:13,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:03:13,486 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 16:03:13,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 16:03:13,486 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:03:13,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:03:13,487 INFO L85 PathProgramCache]: Analyzing trace with hash 267253026, now seen corresponding path program 1 times [2022-01-10 16:03:13,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:03:13,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622826938] [2022-01-10 16:03:13,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:03:13,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:03:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:03:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 16:03:13,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:03:13,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622826938] [2022-01-10 16:03:13,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622826938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:03:13,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:03:13,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 16:03:13,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675635011] [2022-01-10 16:03:13,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:03:13,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:03:13,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:03:13,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:03:13,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:03:13,590 INFO L87 Difference]: Start difference. First operand 12706 states and 15934 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:14,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:03:14,581 INFO L93 Difference]: Finished difference Result 37422 states and 46901 transitions. [2022-01-10 16:03:14,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:03:14,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 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 216 [2022-01-10 16:03:14,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:03:14,622 INFO L225 Difference]: With dead ends: 37422 [2022-01-10 16:03:14,622 INFO L226 Difference]: Without dead ends: 24718 [2022-01-10 16:03:14,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:03:14,635 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 234 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 16:03:14,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 203 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 16:03:14,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24718 states. [2022-01-10 16:03:14,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24718 to 24308. [2022-01-10 16:03:14,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24308 states, 24307 states have (on average 1.226807092607068) internal successors, (29820), 24307 states have internal predecessors, (29820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:14,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24308 states to 24308 states and 29820 transitions. [2022-01-10 16:03:14,920 INFO L78 Accepts]: Start accepts. Automaton has 24308 states and 29820 transitions. Word has length 216 [2022-01-10 16:03:14,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:03:14,921 INFO L470 AbstractCegarLoop]: Abstraction has 24308 states and 29820 transitions. [2022-01-10 16:03:14,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:14,921 INFO L276 IsEmpty]: Start isEmpty. Operand 24308 states and 29820 transitions. [2022-01-10 16:03:14,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-01-10 16:03:14,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:03:14,948 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 16:03:14,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 16:03:14,949 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:03:14,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:03:14,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1589905519, now seen corresponding path program 1 times [2022-01-10 16:03:14,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:03:14,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381705377] [2022-01-10 16:03:14,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:03:14,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:03:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:03:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 16:03:15,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:03:15,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381705377] [2022-01-10 16:03:15,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381705377] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:03:15,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:03:15,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 16:03:15,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482799998] [2022-01-10 16:03:15,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:03:15,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 16:03:15,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:03:15,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 16:03:15,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 16:03:15,069 INFO L87 Difference]: Start difference. First operand 24308 states and 29820 transitions. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:16,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:03:16,532 INFO L93 Difference]: Finished difference Result 74350 states and 91402 transitions. [2022-01-10 16:03:16,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 16:03:16,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 3 states have internal predecessors, (215), 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 232 [2022-01-10 16:03:16,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:03:16,605 INFO L225 Difference]: With dead ends: 74350 [2022-01-10 16:03:16,605 INFO L226 Difference]: Without dead ends: 50044 [2022-01-10 16:03:16,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 16:03:16,638 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 570 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 16:03:16,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 563 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 16:03:16,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50044 states. [2022-01-10 16:03:17,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50044 to 50003. [2022-01-10 16:03:17,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50003 states, 50002 states have (on average 1.2207311707531698) internal successors, (61039), 50002 states have internal predecessors, (61039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:17,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50003 states to 50003 states and 61039 transitions. [2022-01-10 16:03:17,507 INFO L78 Accepts]: Start accepts. Automaton has 50003 states and 61039 transitions. Word has length 232 [2022-01-10 16:03:17,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:03:17,507 INFO L470 AbstractCegarLoop]: Abstraction has 50003 states and 61039 transitions. [2022-01-10 16:03:17,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:17,508 INFO L276 IsEmpty]: Start isEmpty. Operand 50003 states and 61039 transitions. [2022-01-10 16:03:17,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-01-10 16:03:17,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:03:17,534 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 16:03:17,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 16:03:17,535 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:03:17,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:03:17,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1731479920, now seen corresponding path program 1 times [2022-01-10 16:03:17,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:03:17,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598920663] [2022-01-10 16:03:17,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:03:17,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:03:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:03:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 16:03:17,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:03:17,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598920663] [2022-01-10 16:03:17,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598920663] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:03:17,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:03:17,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 16:03:17,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616567538] [2022-01-10 16:03:17,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:03:17,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 16:03:17,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:03:17,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 16:03:17,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 16:03:17,798 INFO L87 Difference]: Start difference. First operand 50003 states and 61039 transitions. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:19,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:03:19,454 INFO L93 Difference]: Finished difference Result 176436 states and 216580 transitions. [2022-01-10 16:03:19,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 16:03:19,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2022-01-10 16:03:19,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:03:19,704 INFO L225 Difference]: With dead ends: 176436 [2022-01-10 16:03:19,704 INFO L226 Difference]: Without dead ends: 126435 [2022-01-10 16:03:19,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 16:03:19,741 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 777 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 16:03:19,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [777 Valid, 344 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 16:03:19,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126435 states. [2022-01-10 16:03:21,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126435 to 126401. [2022-01-10 16:03:21,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126401 states, 126400 states have (on average 1.2285680379746835) internal successors, (155291), 126400 states have internal predecessors, (155291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:21,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126401 states to 126401 states and 155291 transitions. [2022-01-10 16:03:21,759 INFO L78 Accepts]: Start accepts. Automaton has 126401 states and 155291 transitions. Word has length 234 [2022-01-10 16:03:21,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:03:21,759 INFO L470 AbstractCegarLoop]: Abstraction has 126401 states and 155291 transitions. [2022-01-10 16:03:21,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:21,760 INFO L276 IsEmpty]: Start isEmpty. Operand 126401 states and 155291 transitions. [2022-01-10 16:03:21,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-01-10 16:03:21,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:03:21,796 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 16:03:21,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 16:03:21,797 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:03:21,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:03:21,797 INFO L85 PathProgramCache]: Analyzing trace with hash -823989601, now seen corresponding path program 1 times [2022-01-10 16:03:21,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:03:21,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963606143] [2022-01-10 16:03:21,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:03:21,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:03:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:03:22,099 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 16:03:22,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:03:22,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963606143] [2022-01-10 16:03:22,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963606143] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:03:22,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:03:22,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 16:03:22,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513603767] [2022-01-10 16:03:22,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:03:22,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:03:22,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:03:22,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:03:22,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:03:22,101 INFO L87 Difference]: Start difference. First operand 126401 states and 155291 transitions. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 2 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:24,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:03:24,107 INFO L93 Difference]: Finished difference Result 312634 states and 383182 transitions. [2022-01-10 16:03:24,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:03:24,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 2 states have internal predecessors, (237), 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 237 [2022-01-10 16:03:24,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:03:24,418 INFO L225 Difference]: With dead ends: 312634 [2022-01-10 16:03:24,418 INFO L226 Difference]: Without dead ends: 186235 [2022-01-10 16:03:24,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 16:03:24,488 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 171 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 16:03:24,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 178 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 16:03:24,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186235 states. [2022-01-10 16:03:26,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186235 to 186194. [2022-01-10 16:03:26,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186194 states, 186193 states have (on average 1.1954155097130397) internal successors, (222578), 186193 states have internal predecessors, (222578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:27,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186194 states to 186194 states and 222578 transitions. [2022-01-10 16:03:27,269 INFO L78 Accepts]: Start accepts. Automaton has 186194 states and 222578 transitions. Word has length 237 [2022-01-10 16:03:27,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:03:27,270 INFO L470 AbstractCegarLoop]: Abstraction has 186194 states and 222578 transitions. [2022-01-10 16:03:27,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 2 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:27,270 INFO L276 IsEmpty]: Start isEmpty. Operand 186194 states and 222578 transitions. [2022-01-10 16:03:27,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-01-10 16:03:27,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:03:27,316 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 16:03:27,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 16:03:27,317 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:03:27,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:03:27,317 INFO L85 PathProgramCache]: Analyzing trace with hash -488724169, now seen corresponding path program 1 times [2022-01-10 16:03:27,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:03:27,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269404257] [2022-01-10 16:03:27,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:03:27,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:03:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:03:27,636 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 69 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 16:03:27,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:03:27,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269404257] [2022-01-10 16:03:27,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269404257] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 16:03:27,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800032035] [2022-01-10 16:03:27,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:03:27,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 16:03:27,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 16:03:27,638 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 16:03:27,659 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 16:03:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:03:28,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 7129 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 16:03:28,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 16:03:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 16:03:29,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 16:03:29,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800032035] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:03:29,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 16:03:29,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 16:03:29,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651603949] [2022-01-10 16:03:29,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:03:29,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:03:29,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:03:29,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:03:29,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 16:03:29,015 INFO L87 Difference]: Start difference. First operand 186194 states and 222578 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:31,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:03:31,161 INFO L93 Difference]: Finished difference Result 401025 states and 477485 transitions. [2022-01-10 16:03:31,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:03:31,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 244 [2022-01-10 16:03:31,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:03:31,485 INFO L225 Difference]: With dead ends: 401025 [2022-01-10 16:03:31,485 INFO L226 Difference]: Without dead ends: 214833 [2022-01-10 16:03:31,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 16:03:31,560 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 148 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 16:03:31,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 191 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 16:03:31,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214833 states. [2022-01-10 16:03:33,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214833 to 212584. [2022-01-10 16:03:34,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212584 states, 212583 states have (on average 1.1831049519481802) internal successors, (251508), 212583 states have internal predecessors, (251508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:34,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212584 states to 212584 states and 251508 transitions. [2022-01-10 16:03:34,593 INFO L78 Accepts]: Start accepts. Automaton has 212584 states and 251508 transitions. Word has length 244 [2022-01-10 16:03:34,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:03:34,594 INFO L470 AbstractCegarLoop]: Abstraction has 212584 states and 251508 transitions. [2022-01-10 16:03:34,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:34,594 INFO L276 IsEmpty]: Start isEmpty. Operand 212584 states and 251508 transitions. [2022-01-10 16:03:34,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-01-10 16:03:34,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:03:34,646 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, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 16:03:34,670 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 16:03:34,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-10 16:03:34,857 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:03:34,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:03:34,857 INFO L85 PathProgramCache]: Analyzing trace with hash -462698613, now seen corresponding path program 1 times [2022-01-10 16:03:34,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:03:34,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272499827] [2022-01-10 16:03:34,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:03:34,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:03:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:03:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 16:03:35,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:03:35,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272499827] [2022-01-10 16:03:35,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272499827] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 16:03:35,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361365003] [2022-01-10 16:03:35,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:03:35,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 16:03:35,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 16:03:35,032 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 16:03:35,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 16:03:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:03:35,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 7402 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 16:03:35,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 16:03:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 16:03:36,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 16:03:36,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361365003] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:03:36,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 16:03:36,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 16:03:36,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103476007] [2022-01-10 16:03:36,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:03:36,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:03:36,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:03:36,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:03:36,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 16:03:36,164 INFO L87 Difference]: Start difference. First operand 212584 states and 251508 transitions. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:38,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:03:38,276 INFO L93 Difference]: Finished difference Result 425167 states and 503019 transitions. [2022-01-10 16:03:38,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:03:38,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 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 254 [2022-01-10 16:03:38,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:03:38,634 INFO L225 Difference]: With dead ends: 425167 [2022-01-10 16:03:38,634 INFO L226 Difference]: Without dead ends: 212585 [2022-01-10 16:03:38,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 16:03:38,722 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 97 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 16:03:38,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 342 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 16:03:38,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212585 states. [2022-01-10 16:03:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212585 to 204855. [2022-01-10 16:03:41,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204855 states, 204854 states have (on average 1.166352621867281) internal successors, (238932), 204854 states have internal predecessors, (238932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:41,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204855 states to 204855 states and 238932 transitions. [2022-01-10 16:03:41,633 INFO L78 Accepts]: Start accepts. Automaton has 204855 states and 238932 transitions. Word has length 254 [2022-01-10 16:03:41,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:03:41,634 INFO L470 AbstractCegarLoop]: Abstraction has 204855 states and 238932 transitions. [2022-01-10 16:03:41,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:41,634 INFO L276 IsEmpty]: Start isEmpty. Operand 204855 states and 238932 transitions. [2022-01-10 16:03:41,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-01-10 16:03:41,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:03:41,703 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 16:03:41,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 16:03:41,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-10 16:03:41,907 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:03:41,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:03:41,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1060813372, now seen corresponding path program 1 times [2022-01-10 16:03:41,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:03:41,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172512729] [2022-01-10 16:03:41,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:03:41,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:03:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:03:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 94 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-01-10 16:03:42,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:03:42,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172512729] [2022-01-10 16:03:42,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172512729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 16:03:42,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054422151] [2022-01-10 16:03:42,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:03:42,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 16:03:42,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 16:03:42,035 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 16:03:42,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 16:03:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:03:42,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 8370 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 16:03:42,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 16:03:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-01-10 16:03:43,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 16:03:43,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054422151] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:03:43,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 16:03:43,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 16:03:43,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182346024] [2022-01-10 16:03:43,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:03:43,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 16:03:43,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:03:43,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 16:03:43,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 16:03:43,357 INFO L87 Difference]: Start difference. First operand 204855 states and 238932 transitions. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:45,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:03:45,666 INFO L93 Difference]: Finished difference Result 478257 states and 560678 transitions. [2022-01-10 16:03:45,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 16:03:45,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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 285 [2022-01-10 16:03:45,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 16:03:46,087 INFO L225 Difference]: With dead ends: 478257 [2022-01-10 16:03:46,087 INFO L226 Difference]: Without dead ends: 273404 [2022-01-10 16:03:46,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 16:03:46,433 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 71 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 16:03:46,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 420 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 16:03:46,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273404 states. [2022-01-10 16:03:49,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273404 to 262989. [2022-01-10 16:03:49,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262989 states, 262988 states have (on average 1.1625017111046891) internal successors, (305724), 262988 states have internal predecessors, (305724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:50,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262989 states to 262989 states and 305724 transitions. [2022-01-10 16:03:50,206 INFO L78 Accepts]: Start accepts. Automaton has 262989 states and 305724 transitions. Word has length 285 [2022-01-10 16:03:50,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 16:03:50,206 INFO L470 AbstractCegarLoop]: Abstraction has 262989 states and 305724 transitions. [2022-01-10 16:03:50,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:50,207 INFO L276 IsEmpty]: Start isEmpty. Operand 262989 states and 305724 transitions. [2022-01-10 16:03:50,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-01-10 16:03:50,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 16:03:50,291 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 16:03:50,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 16:03:50,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 16:03:50,513 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 16:03:50,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 16:03:50,513 INFO L85 PathProgramCache]: Analyzing trace with hash 245081802, now seen corresponding path program 1 times [2022-01-10 16:03:50,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 16:03:50,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667797767] [2022-01-10 16:03:50,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 16:03:50,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 16:03:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 16:03:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 16:03:50,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 16:03:50,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667797767] [2022-01-10 16:03:50,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667797767] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 16:03:50,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 16:03:50,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 16:03:50,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840966241] [2022-01-10 16:03:50,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 16:03:50,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 16:03:50,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 16:03:50,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 16:03:50,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-10 16:03:50,707 INFO L87 Difference]: Start difference. First operand 262989 states and 305724 transitions. Second operand has 5 states, 5 states have (on average 59.2) internal successors, (296), 5 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 16:03:55,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 16:03:55,617 INFO L93 Difference]: Finished difference Result 938292 states and 1094423 transitions. [2022-01-10 16:03:55,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 16:03:55,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 59.2) internal successors, (296), 5 states have internal predecessors, (296), 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 296 [2022-01-10 16:03:55,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted.