/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/loops/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 14:21:53,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 14:21:53,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 14:21:53,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 14:21:53,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 14:21:53,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 14:21:53,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 14:21:53,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 14:21:53,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 14:21:53,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 14:21:53,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 14:21:53,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 14:21:53,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 14:21:53,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 14:21:53,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 14:21:53,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 14:21:53,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 14:21:53,341 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 14:21:53,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 14:21:53,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 14:21:53,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 14:21:53,342 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-01-10 14:21:53,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 14:21:53,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 14:21:53,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 14:21:53,347 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 14:21:53,364 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 14:21:53,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 14:21:53,365 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 14:21:53,366 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 14:21:53,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 14:21:53,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 14:21:53,367 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 14:21:53,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 14:21:53,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 14:21:53,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 14:21:53,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 14:21:53,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 14:21:53,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 14:21:53,368 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 14:21:53,368 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 14:21:53,368 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 14:21:53,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 14:21:53,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 14:21:53,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 14:21:53,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 14:21:53,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 14:21:53,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 14:21:53,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 14:21:53,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 14:21:53,369 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 14:21:53,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 14:21:53,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 14:21:53,370 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 14:21:53,370 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 14:21:53,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 14:21:53,370 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 14:21:53,370 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 14:21:53,371 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 14:21:53,371 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 14:21:53,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 14:21:53,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 14:21:53,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 14:21:53,598 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 14:21:53,601 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 14:21:53,601 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2022-01-10 14:21:53,664 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c02c6d2b/aec2f1d8dfe3449983ba273abf8e2474/FLAGfeb698cd6 [2022-01-10 14:21:53,984 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 14:21:53,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i [2022-01-10 14:21:53,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c02c6d2b/aec2f1d8dfe3449983ba273abf8e2474/FLAGfeb698cd6 [2022-01-10 14:21:54,006 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c02c6d2b/aec2f1d8dfe3449983ba273abf8e2474 [2022-01-10 14:21:54,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 14:21:54,010 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 14:21:54,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 14:21:54,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 14:21:54,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 14:21:54,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:21:54" (1/1) ... [2022-01-10 14:21:54,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c623ae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:54, skipping insertion in model container [2022-01-10 14:21:54,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:21:54" (1/1) ... [2022-01-10 14:21:54,020 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 14:21:54,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 14:21:54,177 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i[808,821] [2022-01-10 14:21:54,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 14:21:54,217 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 14:21:54,229 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i[808,821] [2022-01-10 14:21:54,254 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 14:21:54,265 INFO L208 MainTranslator]: Completed translation [2022-01-10 14:21:54,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:54 WrapperNode [2022-01-10 14:21:54,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 14:21:54,266 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 14:21:54,266 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 14:21:54,266 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 14:21:54,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:54" (1/1) ... [2022-01-10 14:21:54,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:54" (1/1) ... [2022-01-10 14:21:54,308 INFO L137 Inliner]: procedures = 16, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 123 [2022-01-10 14:21:54,308 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 14:21:54,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 14:21:54,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 14:21:54,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 14:21:54,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:54" (1/1) ... [2022-01-10 14:21:54,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:54" (1/1) ... [2022-01-10 14:21:54,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:54" (1/1) ... [2022-01-10 14:21:54,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:54" (1/1) ... [2022-01-10 14:21:54,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:54" (1/1) ... [2022-01-10 14:21:54,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:54" (1/1) ... [2022-01-10 14:21:54,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:54" (1/1) ... [2022-01-10 14:21:54,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 14:21:54,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 14:21:54,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 14:21:54,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 14:21:54,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:54" (1/1) ... [2022-01-10 14:21:54,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 14:21:54,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:21:54,401 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 14:21:54,455 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 14:21:54,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 14:21:54,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-01-10 14:21:54,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 14:21:54,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 14:21:54,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 14:21:54,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 14:21:54,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-01-10 14:21:54,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 14:21:54,524 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 14:21:54,525 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 14:21:54,705 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 14:21:54,709 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 14:21:54,710 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-10 14:21:54,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:21:54 BoogieIcfgContainer [2022-01-10 14:21:54,711 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 14:21:54,711 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 14:21:54,712 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 14:21:54,712 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 14:21:54,714 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:21:54" (1/1) ... [2022-01-10 14:21:54,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:21:54 BasicIcfg [2022-01-10 14:21:54,843 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 14:21:54,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 14:21:54,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 14:21:54,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 14:21:54,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:21:54" (1/4) ... [2022-01-10 14:21:54,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6185098d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:21:54, skipping insertion in model container [2022-01-10 14:21:54,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:21:54" (2/4) ... [2022-01-10 14:21:54,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6185098d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:21:54, skipping insertion in model container [2022-01-10 14:21:54,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:21:54" (3/4) ... [2022-01-10 14:21:54,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6185098d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 02:21:54, skipping insertion in model container [2022-01-10 14:21:54,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 02:21:54" (4/4) ... [2022-01-10 14:21:54,860 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.iTransformedIcfg [2022-01-10 14:21:54,863 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 14:21:54,863 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 14:21:54,897 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 14:21:54,903 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 14:21:54,903 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 14:21:54,914 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 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 14:21:54,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 14:21:54,918 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:21:54,919 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:21:54,919 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:21:54,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:21:54,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1605880179, now seen corresponding path program 1 times [2022-01-10 14:21:54,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:21:54,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491619103] [2022-01-10 14:21:54,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:21:54,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:21:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:21:55,116 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 14:21:55,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:21:55,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491619103] [2022-01-10 14:21:55,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491619103] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:21:55,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:21:55,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 14:21:55,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412049811] [2022-01-10 14:21:55,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:21:55,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 14:21:55,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:21:55,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 14:21:55,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 14:21:55,147 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 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 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 14:21:55,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:21:55,198 INFO L93 Difference]: Finished difference Result 74 states and 112 transitions. [2022-01-10 14:21:55,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 14:21:55,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-01-10 14:21:55,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:21:55,205 INFO L225 Difference]: With dead ends: 74 [2022-01-10 14:21:55,205 INFO L226 Difference]: Without dead ends: 42 [2022-01-10 14:21:55,208 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 14:21:55,211 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:21:55,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 48 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:21:55,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-10 14:21:55,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 25. [2022-01-10 14:21:55,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 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 14:21:55,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-01-10 14:21:55,238 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 12 [2022-01-10 14:21:55,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:21:55,239 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-01-10 14:21:55,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 14:21:55,239 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-01-10 14:21:55,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 14:21:55,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:21:55,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:21:55,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 14:21:55,241 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:21:55,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:21:55,244 INFO L85 PathProgramCache]: Analyzing trace with hash -13383659, now seen corresponding path program 1 times [2022-01-10 14:21:55,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:21:55,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885478677] [2022-01-10 14:21:55,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:21:55,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:21:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:21:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 14:21:55,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:21:55,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885478677] [2022-01-10 14:21:55,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885478677] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:21:55,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:21:55,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 14:21:55,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336226959] [2022-01-10 14:21:55,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:21:55,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 14:21:55,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:21:55,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 14:21:55,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 14:21:55,403 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 14:21:55,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:21:55,456 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-01-10 14:21:55,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 14:21:55,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-01-10 14:21:55,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:21:55,457 INFO L225 Difference]: With dead ends: 51 [2022-01-10 14:21:55,457 INFO L226 Difference]: Without dead ends: 47 [2022-01-10 14:21:55,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 14:21:55,458 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 34 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:21:55,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 106 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:21:55,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-10 14:21:55,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-01-10 14:21:55,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 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 14:21:55,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2022-01-10 14:21:55,469 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 16 [2022-01-10 14:21:55,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:21:55,469 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2022-01-10 14:21:55,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 14:21:55,469 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2022-01-10 14:21:55,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 14:21:55,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:21:55,470 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] [2022-01-10 14:21:55,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 14:21:55,470 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:21:55,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:21:55,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1375555160, now seen corresponding path program 1 times [2022-01-10 14:21:55,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:21:55,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662730594] [2022-01-10 14:21:55,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:21:55,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:21:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:21:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 14:21:55,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:21:55,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662730594] [2022-01-10 14:21:55,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662730594] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:21:55,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 14:21:55,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 14:21:55,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032697205] [2022-01-10 14:21:55,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:21:55,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 14:21:55,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:21:55,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 14:21:55,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 14:21:55,550 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 14:21:55,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:21:55,605 INFO L93 Difference]: Finished difference Result 86 states and 114 transitions. [2022-01-10 14:21:55,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 14:21:55,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-01-10 14:21:55,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:21:55,608 INFO L225 Difference]: With dead ends: 86 [2022-01-10 14:21:55,608 INFO L226 Difference]: Without dead ends: 58 [2022-01-10 14:21:55,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 14:21:55,610 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:21:55,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 65 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 14:21:55,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-10 14:21:55,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2022-01-10 14:21:55,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 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 14:21:55,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2022-01-10 14:21:55,625 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 22 [2022-01-10 14:21:55,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:21:55,626 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2022-01-10 14:21:55,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 14:21:55,626 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2022-01-10 14:21:55,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 14:21:55,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:21:55,627 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:21:55,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 14:21:55,627 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:21:55,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:21:55,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1285283098, now seen corresponding path program 1 times [2022-01-10 14:21:55,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:21:55,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126398201] [2022-01-10 14:21:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:21:55,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:21:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:21:55,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 14:21:55,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:21:55,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126398201] [2022-01-10 14:21:55,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126398201] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:21:55,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842019226] [2022-01-10 14:21:55,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:21:55,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:21:55,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:21:55,764 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 14:21:55,766 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 14:21:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:21:55,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 14:21:55,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:21:56,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 14:21:56,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 14:21:56,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 30 [2022-01-10 14:21:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 14:21:56,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 14:21:56,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842019226] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:21:56,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 14:21:56,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2022-01-10 14:21:56,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908467065] [2022-01-10 14:21:56,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:21:56,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 14:21:56,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:21:56,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 14:21:56,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-01-10 14:21:56,356 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 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 14:21:56,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:21:56,469 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2022-01-10 14:21:56,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 14:21:56,470 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2022-01-10 14:21:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:21:56,470 INFO L225 Difference]: With dead ends: 60 [2022-01-10 14:21:56,470 INFO L226 Difference]: Without dead ends: 39 [2022-01-10 14:21:56,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-10 14:21:56,472 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 14:21:56,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 117 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-01-10 14:21:56,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-10 14:21:56,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-01-10 14:21:56,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 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 14:21:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2022-01-10 14:21:56,475 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 23 [2022-01-10 14:21:56,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:21:56,476 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2022-01-10 14:21:56,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 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 14:21:56,476 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2022-01-10 14:21:56,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-10 14:21:56,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:21:56,477 INFO L514 BasicCegarLoop]: trace histogram [2, 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 14:21:56,498 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 14:21:56,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:21:56,695 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:21:56,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:21:56,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1956065483, now seen corresponding path program 1 times [2022-01-10 14:21:56,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:21:56,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684909187] [2022-01-10 14:21:56,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:21:56,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:21:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:21:56,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 14:21:56,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:21:56,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684909187] [2022-01-10 14:21:56,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684909187] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:21:56,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715060058] [2022-01-10 14:21:56,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:21:56,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:21:56,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:21:56,776 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 14:21:56,777 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 14:21:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:21:56,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 14:21:56,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:21:57,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 14:21:57,013 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 14:21:57,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 31 [2022-01-10 14:21:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 14:21:57,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:21:57,388 INFO L353 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2022-01-10 14:21:57,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 51 [2022-01-10 14:21:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 14:21:57,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715060058] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:21:57,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:21:57,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 7] total 15 [2022-01-10 14:21:57,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046422777] [2022-01-10 14:21:57,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:21:57,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 14:21:57,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:21:57,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 14:21:57,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-01-10 14:21:57,443 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 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 14:21:57,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:21:57,643 INFO L93 Difference]: Finished difference Result 104 states and 140 transitions. [2022-01-10 14:21:57,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 14:21:57,643 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 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 24 [2022-01-10 14:21:57,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:21:57,645 INFO L225 Difference]: With dead ends: 104 [2022-01-10 14:21:57,645 INFO L226 Difference]: Without dead ends: 70 [2022-01-10 14:21:57,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2022-01-10 14:21:57,646 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 104 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 14:21:57,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 156 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 110 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-01-10 14:21:57,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-10 14:21:57,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 43. [2022-01-10 14:21:57,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 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 14:21:57,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2022-01-10 14:21:57,651 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 24 [2022-01-10 14:21:57,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:21:57,651 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2022-01-10 14:21:57,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 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 14:21:57,651 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2022-01-10 14:21:57,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 14:21:57,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:21:57,652 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:21:57,668 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 14:21:57,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:21:57,863 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:21:57,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:21:57,864 INFO L85 PathProgramCache]: Analyzing trace with hash -570026943, now seen corresponding path program 1 times [2022-01-10 14:21:57,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:21:57,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986139560] [2022-01-10 14:21:57,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:21:57,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:21:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:21:57,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 14:21:57,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:21:57,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986139560] [2022-01-10 14:21:57,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986139560] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:21:57,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71192945] [2022-01-10 14:21:57,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:21:57,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:21:57,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:21:57,918 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 14:21:57,919 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 14:21:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:21:57,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 14:21:57,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:21:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 14:21:58,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:21:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 14:21:58,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71192945] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:21:58,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:21:58,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 9 [2022-01-10 14:21:58,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408754292] [2022-01-10 14:21:58,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:21:58,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 14:21:58,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:21:58,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 14:21:58,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-10 14:21:58,079 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 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 14:21:58,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:21:58,294 INFO L93 Difference]: Finished difference Result 242 states and 357 transitions. [2022-01-10 14:21:58,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 14:21:58,295 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 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 27 [2022-01-10 14:21:58,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:21:58,296 INFO L225 Difference]: With dead ends: 242 [2022-01-10 14:21:58,296 INFO L226 Difference]: Without dead ends: 212 [2022-01-10 14:21:58,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-01-10 14:21:58,297 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 210 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 14:21:58,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 112 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 14:21:58,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-10 14:21:58,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 71. [2022-01-10 14:21:58,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.3) internal successors, (91), 70 states have internal predecessors, (91), 0 states have call successors, (0), 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 14:21:58,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2022-01-10 14:21:58,317 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 27 [2022-01-10 14:21:58,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:21:58,317 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2022-01-10 14:21:58,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 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 14:21:58,317 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2022-01-10 14:21:58,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-10 14:21:58,318 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:21:58,318 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:21:58,339 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 14:21:58,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:21:58,537 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:21:58,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:21:58,537 INFO L85 PathProgramCache]: Analyzing trace with hash 247921871, now seen corresponding path program 2 times [2022-01-10 14:21:58,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:21:58,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186324261] [2022-01-10 14:21:58,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:21:58,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:21:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:21:58,621 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-10 14:21:58,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:21:58,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186324261] [2022-01-10 14:21:58,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186324261] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:21:58,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452478514] [2022-01-10 14:21:58,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 14:21:58,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:21:58,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:21:58,636 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 14:21:58,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 14:21:58,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 14:21:58,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 14:21:58,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 14:21:58,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:21:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 14:21:58,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:21:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 14:21:58,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452478514] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:21:58,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:21:58,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 14 [2022-01-10 14:21:58,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973814437] [2022-01-10 14:21:58,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:21:58,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 14:21:58,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:21:58,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 14:21:58,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-10 14:21:58,985 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 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 14:22:00,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:22:00,193 INFO L93 Difference]: Finished difference Result 965 states and 1255 transitions. [2022-01-10 14:22:00,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-10 14:22:00,194 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 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 36 [2022-01-10 14:22:00,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:22:00,196 INFO L225 Difference]: With dead ends: 965 [2022-01-10 14:22:00,196 INFO L226 Difference]: Without dead ends: 901 [2022-01-10 14:22:00,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=816, Invalid=3090, Unknown=0, NotChecked=0, Total=3906 [2022-01-10 14:22:00,198 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 803 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 14:22:00,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 334 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 14:22:00,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-01-10 14:22:00,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 83. [2022-01-10 14:22:00,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 82 states have internal predecessors, (104), 0 states have call successors, (0), 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 14:22:00,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2022-01-10 14:22:00,212 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 36 [2022-01-10 14:22:00,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:22:00,212 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2022-01-10 14:22:00,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 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 14:22:00,213 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2022-01-10 14:22:00,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 14:22:00,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:22:00,214 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:22:00,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-10 14:22:00,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:22:00,427 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:22:00,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:22:00,428 INFO L85 PathProgramCache]: Analyzing trace with hash 181603962, now seen corresponding path program 3 times [2022-01-10 14:22:00,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:22:00,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062651873] [2022-01-10 14:22:00,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:22:00,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:22:00,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:22:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-10 14:22:00,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:22:00,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062651873] [2022-01-10 14:22:00,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062651873] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:22:00,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833172248] [2022-01-10 14:22:00,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 14:22:00,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:22:00,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:22:00,524 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 14:22:00,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 14:22:00,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 14:22:00,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 14:22:00,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-10 14:22:00,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:22:01,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 14:22:01,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 14:22:01,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 36 [2022-01-10 14:22:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-01-10 14:22:01,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 14:22:01,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833172248] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 14:22:01,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 14:22:01,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2022-01-10 14:22:01,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450946359] [2022-01-10 14:22:01,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 14:22:01,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 14:22:01,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:22:01,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 14:22:01,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-01-10 14:22:01,281 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 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 14:22:01,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:22:01,306 INFO L93 Difference]: Finished difference Result 123 states and 155 transitions. [2022-01-10 14:22:01,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 14:22:01,306 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 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 46 [2022-01-10 14:22:01,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:22:01,308 INFO L225 Difference]: With dead ends: 123 [2022-01-10 14:22:01,308 INFO L226 Difference]: Without dead ends: 84 [2022-01-10 14:22:01,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-01-10 14:22:01,309 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 4 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 14:22:01,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 98 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 38 Unchecked, 0.0s Time] [2022-01-10 14:22:01,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-10 14:22:01,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2022-01-10 14:22:01,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2658227848101267) internal successors, (100), 79 states have internal predecessors, (100), 0 states have call successors, (0), 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 14:22:01,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2022-01-10 14:22:01,330 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 46 [2022-01-10 14:22:01,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:22:01,330 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2022-01-10 14:22:01,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 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 14:22:01,330 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2022-01-10 14:22:01,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-10 14:22:01,335 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:22:01,335 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:22:01,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-10 14:22:01,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:22:01,540 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:22:01,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:22:01,541 INFO L85 PathProgramCache]: Analyzing trace with hash 292417178, now seen corresponding path program 1 times [2022-01-10 14:22:01,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:22:01,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163797164] [2022-01-10 14:22:01,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:22:01,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:22:01,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:22:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-01-10 14:22:01,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:22:01,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163797164] [2022-01-10 14:22:01,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163797164] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:22:01,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664788523] [2022-01-10 14:22:01,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:22:01,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:22:01,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:22:01,653 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 14:22:01,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-10 14:22:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:22:01,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-10 14:22:01,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:22:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 14:22:01,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:22:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-10 14:22:02,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664788523] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:22:02,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:22:02,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 7] total 20 [2022-01-10 14:22:02,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593776539] [2022-01-10 14:22:02,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:22:02,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-10 14:22:02,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:22:02,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-10 14:22:02,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-01-10 14:22:02,055 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 0 states have call successors, (0), 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 14:22:04,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:22:04,554 INFO L93 Difference]: Finished difference Result 838 states and 1251 transitions. [2022-01-10 14:22:04,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-10 14:22:04,555 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 0 states have call successors, (0), 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 53 [2022-01-10 14:22:04,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:22:04,557 INFO L225 Difference]: With dead ends: 838 [2022-01-10 14:22:04,557 INFO L226 Difference]: Without dead ends: 780 [2022-01-10 14:22:04,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1790 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=927, Invalid=4773, Unknown=0, NotChecked=0, Total=5700 [2022-01-10 14:22:04,560 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 1317 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1317 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 1920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 14:22:04,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1317 Valid, 1199 Invalid, 1920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 1464 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 14:22:04,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-01-10 14:22:04,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 152. [2022-01-10 14:22:04,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.2980132450331126) internal successors, (196), 151 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 14:22:04,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 196 transitions. [2022-01-10 14:22:04,590 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 196 transitions. Word has length 53 [2022-01-10 14:22:04,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:22:04,591 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 196 transitions. [2022-01-10 14:22:04,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 0 states have call successors, (0), 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 14:22:04,591 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 196 transitions. [2022-01-10 14:22:04,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-10 14:22:04,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:22:04,593 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:22:04,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-10 14:22:04,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:22:04,811 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:22:04,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:22:04,811 INFO L85 PathProgramCache]: Analyzing trace with hash -152277990, now seen corresponding path program 2 times [2022-01-10 14:22:04,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:22:04,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636685744] [2022-01-10 14:22:04,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:22:04,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:22:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:22:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-01-10 14:22:05,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:22:05,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636685744] [2022-01-10 14:22:05,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636685744] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:22:05,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937832976] [2022-01-10 14:22:05,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 14:22:05,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:22:05,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:22:05,052 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 14:22:05,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-10 14:22:05,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 14:22:05,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 14:22:05,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-10 14:22:05,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:22:20,593 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-01-10 14:22:20,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 14:22:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 38 proven. 87 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-01-10 14:22:22,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937832976] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 14:22:22,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 14:22:22,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 16] total 28 [2022-01-10 14:22:22,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604109054] [2022-01-10 14:22:22,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 14:22:22,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-10 14:22:22,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 14:22:22,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-10 14:22:22,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=609, Unknown=7, NotChecked=0, Total=756 [2022-01-10 14:22:22,127 INFO L87 Difference]: Start difference. First operand 152 states and 196 transitions. Second operand has 28 states, 28 states have (on average 3.0) internal successors, (84), 28 states have internal predecessors, (84), 0 states have call successors, (0), 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 14:22:24,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 14:22:24,108 INFO L93 Difference]: Finished difference Result 1053 states and 1393 transitions. [2022-01-10 14:22:24,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-10 14:22:24,109 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 28 states have internal predecessors, (84), 0 states have call successors, (0), 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 89 [2022-01-10 14:22:24,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 14:22:24,112 INFO L225 Difference]: With dead ends: 1053 [2022-01-10 14:22:24,112 INFO L226 Difference]: Without dead ends: 916 [2022-01-10 14:22:24,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 158 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=309, Invalid=1490, Unknown=7, NotChecked=0, Total=1806 [2022-01-10 14:22:24,113 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 262 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 14:22:24,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 694 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 556 Invalid, 0 Unknown, 53 Unchecked, 0.9s Time] [2022-01-10 14:22:24,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-01-10 14:22:24,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 160. [2022-01-10 14:22:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.2830188679245282) internal successors, (204), 159 states have internal predecessors, (204), 0 states have call successors, (0), 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 14:22:24,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 204 transitions. [2022-01-10 14:22:24,158 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 204 transitions. Word has length 89 [2022-01-10 14:22:24,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 14:22:24,158 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 204 transitions. [2022-01-10 14:22:24,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 28 states have internal predecessors, (84), 0 states have call successors, (0), 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 14:22:24,159 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 204 transitions. [2022-01-10 14:22:24,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-10 14:22:24,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 14:22:24,159 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 14:22:24,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-10 14:22:24,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:22:24,364 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 14:22:24,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 14:22:24,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1843462254, now seen corresponding path program 3 times [2022-01-10 14:22:24,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 14:22:24,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838344603] [2022-01-10 14:22:24,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 14:22:24,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 14:22:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 14:22:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-01-10 14:22:26,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 14:22:26,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838344603] [2022-01-10 14:22:26,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838344603] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 14:22:26,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498873069] [2022-01-10 14:22:26,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 14:22:26,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 14:22:26,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 14:22:26,571 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 14:22:26,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-10 14:23:04,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-10 14:23:04,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 14:23:04,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 1172 conjuncts, 228 conjunts are in the unsatisfiable core [2022-01-10 14:23:04,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 14:23:04,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-10 14:23:04,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-10 14:23:04,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-10 14:23:04,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-10 14:23:04,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-10 14:23:05,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-10 14:23:05,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-10 14:23:05,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-10 14:23:05,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-10 14:23:05,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-10 14:23:05,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-10 14:23:05,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25