/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf -i ../../../trunk/examples/svcomp/array-programs/copysome1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 09:39:41,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 09:39:41,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 09:39:41,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 09:39:41,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 09:39:41,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 09:39:41,290 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 09:39:41,291 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 09:39:41,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 09:39:41,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 09:39:41,294 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 09:39:41,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 09:39:41,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 09:39:41,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 09:39:41,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 09:39:41,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 09:39:41,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 09:39:41,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 09:39:41,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 09:39:41,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 09:39:41,311 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 09:39:41,327 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 09:39:41,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 09:39:41,328 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 09:39:41,329 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 09:39:41,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 09:39:41,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 09:39:41,329 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 09:39:41,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 09:39:41,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 09:39:41,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 09:39:41,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 09:39:41,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 09:39:41,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 09:39:41,330 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 09:39:41,330 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 09:39:41,330 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 09:39:41,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 09:39:41,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 09:39:41,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 09:39:41,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 09:39:41,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 09:39:41,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 09:39:41,336 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 09:39:41,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 09:39:41,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 09:39:41,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 09:39:41,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 09:39:41,336 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 09:39:41,336 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 09:39:41,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 09:39:41,336 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 09:39:41,337 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 09:39:41,337 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 09:39:41,337 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 09:39:41,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 09:39:41,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 09:39:41,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 09:39:41,549 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 09:39:41,549 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 09:39:41,550 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-1.i [2022-01-10 09:39:41,596 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c44031bf5/b83ba695ba414e059ca665ed48222d9e/FLAG0af4eefb5 [2022-01-10 09:39:41,947 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 09:39:41,948 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-1.i [2022-01-10 09:39:41,959 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c44031bf5/b83ba695ba414e059ca665ed48222d9e/FLAG0af4eefb5 [2022-01-10 09:39:41,972 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c44031bf5/b83ba695ba414e059ca665ed48222d9e [2022-01-10 09:39:41,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 09:39:41,976 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 09:39:41,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 09:39:41,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 09:39:41,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 09:39:41,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:39:41" (1/1) ... [2022-01-10 09:39:41,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72fd034d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:39:41, skipping insertion in model container [2022-01-10 09:39:41,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:39:41" (1/1) ... [2022-01-10 09:39:41,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 09:39:42,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 09:39:42,125 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-1.i[806,819] [2022-01-10 09:39:42,145 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 09:39:42,152 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 09:39:42,162 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-1.i[806,819] [2022-01-10 09:39:42,179 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 09:39:42,205 INFO L208 MainTranslator]: Completed translation [2022-01-10 09:39:42,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:39:42 WrapperNode [2022-01-10 09:39:42,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 09:39:42,206 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 09:39:42,206 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 09:39:42,206 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 09:39:42,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:39:42" (1/1) ... [2022-01-10 09:39:42,222 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:39:42" (1/1) ... [2022-01-10 09:39:42,239 INFO L137 Inliner]: procedures = 18, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-01-10 09:39:42,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 09:39:42,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 09:39:42,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 09:39:42,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 09:39:42,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:39:42" (1/1) ... [2022-01-10 09:39:42,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:39:42" (1/1) ... [2022-01-10 09:39:42,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:39:42" (1/1) ... [2022-01-10 09:39:42,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:39:42" (1/1) ... [2022-01-10 09:39:42,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:39:42" (1/1) ... [2022-01-10 09:39:42,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:39:42" (1/1) ... [2022-01-10 09:39:42,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:39:42" (1/1) ... [2022-01-10 09:39:42,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 09:39:42,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 09:39:42,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 09:39:42,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 09:39:42,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:39:42" (1/1) ... [2022-01-10 09:39:42,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 09:39:42,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:39:42,297 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 09:39:42,307 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 09:39:42,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 09:39:42,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 09:39:42,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 09:39:42,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 09:39:42,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 09:39:42,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 09:39:42,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 09:39:42,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 09:39:42,384 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 09:39:42,386 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 09:39:42,516 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 09:39:42,526 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 09:39:42,526 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 09:39:42,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:39:42 BoogieIcfgContainer [2022-01-10 09:39:42,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 09:39:42,528 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 09:39:42,528 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 09:39:42,529 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 09:39:42,537 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:39:42" (1/1) ... [2022-01-10 09:39:42,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:39:42 BasicIcfg [2022-01-10 09:39:42,641 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 09:39:42,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 09:39:42,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 09:39:42,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 09:39:42,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:39:41" (1/4) ... [2022-01-10 09:39:42,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@610a366a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:39:42, skipping insertion in model container [2022-01-10 09:39:42,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:39:42" (2/4) ... [2022-01-10 09:39:42,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@610a366a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:39:42, skipping insertion in model container [2022-01-10 09:39:42,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:39:42" (3/4) ... [2022-01-10 09:39:42,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@610a366a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:39:42, skipping insertion in model container [2022-01-10 09:39:42,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:39:42" (4/4) ... [2022-01-10 09:39:42,646 INFO L111 eAbstractionObserver]: Analyzing ICFG copysome1-1.iTransformedIcfg [2022-01-10 09:39:42,649 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 09:39:42,649 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 09:39:42,677 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 09:39:42,681 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 09:39:42,681 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 09:39:42,689 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 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 09:39:42,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 09:39:42,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:39:42,693 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:39:42,693 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:39:42,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:39:42,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1887403375, now seen corresponding path program 1 times [2022-01-10 09:39:42,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:39:42,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930979680] [2022-01-10 09:39:42,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:39:42,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:39:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:39:42,859 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 09:39:42,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:39:42,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930979680] [2022-01-10 09:39:42,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930979680] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 09:39:42,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 09:39:42,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 09:39:42,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860635512] [2022-01-10 09:39:42,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 09:39:42,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 09:39:42,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:39:42,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 09:39:42,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 09:39:42,892 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 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 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 09:39:42,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:39:42,906 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2022-01-10 09:39:42,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 09:39:42,907 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-01-10 09:39:42,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:39:42,912 INFO L225 Difference]: With dead ends: 36 [2022-01-10 09:39:42,913 INFO L226 Difference]: Without dead ends: 16 [2022-01-10 09:39:42,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 09:39:42,918 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 09:39:42,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 09:39:42,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-01-10 09:39:42,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-01-10 09:39:42,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 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 09:39:42,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-01-10 09:39:42,942 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2022-01-10 09:39:42,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:39:42,942 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-01-10 09:39:42,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 09:39:42,944 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-01-10 09:39:42,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 09:39:42,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:39:42,944 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:39:42,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 09:39:42,945 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:39:42,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:39:42,947 INFO L85 PathProgramCache]: Analyzing trace with hash -636124435, now seen corresponding path program 1 times [2022-01-10 09:39:42,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:39:42,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114134774] [2022-01-10 09:39:42,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:39:42,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:39:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:39:43,097 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 09:39:43,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:39:43,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114134774] [2022-01-10 09:39:43,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114134774] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 09:39:43,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 09:39:43,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 09:39:43,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928711012] [2022-01-10 09:39:43,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 09:39:43,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 09:39:43,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:39:43,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 09:39:43,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 09:39:43,100 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 09:39:43,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:39:43,159 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-01-10 09:39:43,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 09:39:43,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2022-01-10 09:39:43,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:39:43,160 INFO L225 Difference]: With dead ends: 33 [2022-01-10 09:39:43,160 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 09:39:43,164 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 09:39:43,165 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 09:39:43,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 24 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 09:39:43,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 09:39:43,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-01-10 09:39:43,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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 09:39:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-01-10 09:39:43,169 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2022-01-10 09:39:43,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:39:43,169 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-01-10 09:39:43,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 09:39:43,169 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-01-10 09:39:43,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 09:39:43,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:39:43,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:39:43,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 09:39:43,170 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:39:43,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:39:43,171 INFO L85 PathProgramCache]: Analyzing trace with hash -740998732, now seen corresponding path program 1 times [2022-01-10 09:39:43,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:39:43,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623186186] [2022-01-10 09:39:43,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:39:43,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:39:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:39:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 09:39:43,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:39:43,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623186186] [2022-01-10 09:39:43,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623186186] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 09:39:43,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 09:39:43,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 09:39:43,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254049932] [2022-01-10 09:39:43,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 09:39:43,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 09:39:43,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:39:43,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 09:39:43,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 09:39:43,252 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 09:39:43,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:39:43,295 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-01-10 09:39:43,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 09:39:43,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-01-10 09:39:43,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:39:43,296 INFO L225 Difference]: With dead ends: 32 [2022-01-10 09:39:43,296 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 09:39:43,297 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 09:39:43,297 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 09:39:43,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 21 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 09:39:43,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 09:39:43,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-01-10 09:39:43,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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 09:39:43,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-01-10 09:39:43,301 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 15 [2022-01-10 09:39:43,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:39:43,301 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-01-10 09:39:43,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 09:39:43,301 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-01-10 09:39:43,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 09:39:43,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:39:43,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:39:43,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 09:39:43,302 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:39:43,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:39:43,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1811158229, now seen corresponding path program 1 times [2022-01-10 09:39:43,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:39:43,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714558847] [2022-01-10 09:39:43,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:39:43,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:39:43,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:39:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 09:39:43,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:39:43,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714558847] [2022-01-10 09:39:43,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714558847] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:39:43,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247326927] [2022-01-10 09:39:43,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:39:43,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:39:43,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:39:43,400 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 09:39:43,401 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 09:39:43,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:39:43,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 09:39:43,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 09:39:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 09:39:43,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 09:39:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 09:39:43,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247326927] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 09:39:43,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 09:39:43,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-10 09:39:43,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78147708] [2022-01-10 09:39:43,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 09:39:43,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 09:39:43,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:39:43,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 09:39:43,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 09:39:43,697 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 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 09:39:43,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:39:43,842 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-01-10 09:39:43,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 09:39:43,843 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 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 15 [2022-01-10 09:39:43,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:39:43,843 INFO L225 Difference]: With dead ends: 47 [2022-01-10 09:39:43,843 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 09:39:43,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-10 09:39:43,844 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 09:39:43,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 44 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 09:39:43,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 09:39:43,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-10 09:39:43,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 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 09:39:43,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-01-10 09:39:43,850 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 15 [2022-01-10 09:39:43,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:39:43,850 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-01-10 09:39:43,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 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 09:39:43,850 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-01-10 09:39:43,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 09:39:43,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:39:43,853 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:39:43,861 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 09:39:44,054 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 09:39:44,055 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:39:44,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:39:44,055 INFO L85 PathProgramCache]: Analyzing trace with hash -188332364, now seen corresponding path program 1 times [2022-01-10 09:39:44,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:39:44,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255386888] [2022-01-10 09:39:44,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:39:44,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:39:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:39:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 09:39:44,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:39:44,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255386888] [2022-01-10 09:39:44,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255386888] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:39:44,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202457224] [2022-01-10 09:39:44,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:39:44,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:39:44,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:39:44,174 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 09:39:44,175 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 09:39:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:39:44,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 09:39:44,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 09:39:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 09:39:44,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 09:39:44,470 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 09:39:44,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202457224] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 09:39:44,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 09:39:44,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-01-10 09:39:44,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380096057] [2022-01-10 09:39:44,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 09:39:44,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-10 09:39:44,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:39:44,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-10 09:39:44,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-01-10 09:39:44,472 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 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 09:39:44,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:39:44,592 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2022-01-10 09:39:44,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 09:39:44,592 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 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 30 [2022-01-10 09:39:44,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:39:44,593 INFO L225 Difference]: With dead ends: 53 [2022-01-10 09:39:44,593 INFO L226 Difference]: Without dead ends: 37 [2022-01-10 09:39:44,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-01-10 09:39:44,594 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 09:39:44,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 31 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 09:39:44,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-10 09:39:44,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-01-10 09:39:44,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 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 09:39:44,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-01-10 09:39:44,599 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 30 [2022-01-10 09:39:44,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:39:44,599 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-01-10 09:39:44,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 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 09:39:44,600 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-01-10 09:39:44,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-10 09:39:44,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:39:44,600 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:39:44,619 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 09:39:44,811 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 09:39:44,812 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:39:44,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:39:44,812 INFO L85 PathProgramCache]: Analyzing trace with hash 371367285, now seen corresponding path program 2 times [2022-01-10 09:39:44,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:39:44,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252299542] [2022-01-10 09:39:44,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:39:44,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:39:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:39:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 09:39:44,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:39:44,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252299542] [2022-01-10 09:39:44,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252299542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:39:44,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084059207] [2022-01-10 09:39:44,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 09:39:44,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:39:44,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:39:44,968 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 09:39:44,969 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 09:39:45,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 09:39:45,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 09:39:45,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-10 09:39:45,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 09:39:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 09:39:46,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 09:39:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 09:39:47,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084059207] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 09:39:47,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 09:39:47,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-10 09:39:47,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476550947] [2022-01-10 09:39:47,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 09:39:47,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 09:39:47,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:39:47,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 09:39:47,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-01-10 09:39:47,912 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 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 09:39:56,973 WARN L228 SmtUtils]: Spent 6.43s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 09:40:10,298 WARN L228 SmtUtils]: Spent 7.92s on a formula simplification. DAG size of input: 37 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 09:40:26,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:40:26,435 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2022-01-10 09:40:26,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-10 09:40:26,436 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 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 30 [2022-01-10 09:40:26,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:40:26,437 INFO L225 Difference]: With dead ends: 89 [2022-01-10 09:40:26,437 INFO L226 Difference]: Without dead ends: 64 [2022-01-10 09:40:26,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 39.5s TimeCoverageRelationStatistics Valid=196, Invalid=349, Unknown=7, NotChecked=0, Total=552 [2022-01-10 09:40:26,438 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 09:40:26,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 64 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 88 Invalid, 0 Unknown, 24 Unchecked, 0.6s Time] [2022-01-10 09:40:26,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-10 09:40:26,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-01-10 09:40:26,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 63 states have internal predecessors, (73), 0 states have call successors, (0), 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 09:40:26,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2022-01-10 09:40:26,447 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 30 [2022-01-10 09:40:26,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:40:26,447 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2022-01-10 09:40:26,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 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 09:40:26,447 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2022-01-10 09:40:26,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 09:40:26,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:40:26,450 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:40:26,457 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 09:40:26,650 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 09:40:26,651 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:40:26,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:40:26,651 INFO L85 PathProgramCache]: Analyzing trace with hash 2408106, now seen corresponding path program 2 times [2022-01-10 09:40:26,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:40:26,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342438367] [2022-01-10 09:40:26,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:40:26,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:40:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:40:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 65 proven. 26 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-10 09:40:26,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:40:26,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342438367] [2022-01-10 09:40:26,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342438367] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:40:26,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549007703] [2022-01-10 09:40:26,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 09:40:26,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:40:26,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:40:26,827 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 09:40:26,828 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 09:40:26,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 09:40:26,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 09:40:26,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 09:40:26,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 09:40:27,053 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 57 proven. 3 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-01-10 09:40:27,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 09:40:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 57 proven. 3 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-01-10 09:40:27,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549007703] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 09:40:27,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 09:40:27,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 14 [2022-01-10 09:40:27,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216835609] [2022-01-10 09:40:27,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 09:40:27,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-10 09:40:27,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:40:27,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-10 09:40:27,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-01-10 09:40:27,160 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 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 09:40:27,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 09:40:27,686 INFO L93 Difference]: Finished difference Result 105 states and 131 transitions. [2022-01-10 09:40:27,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 09:40:27,687 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 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 47 [2022-01-10 09:40:27,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 09:40:27,689 INFO L225 Difference]: With dead ends: 105 [2022-01-10 09:40:27,689 INFO L226 Difference]: Without dead ends: 72 [2022-01-10 09:40:27,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-01-10 09:40:27,690 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 109 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 09:40:27,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 66 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 09:40:27,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-10 09:40:27,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2022-01-10 09:40:27,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 0 states have call successors, (0), 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 09:40:27,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2022-01-10 09:40:27,698 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 47 [2022-01-10 09:40:27,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 09:40:27,698 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2022-01-10 09:40:27,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 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 09:40:27,698 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2022-01-10 09:40:27,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-10 09:40:27,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 09:40:27,699 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 09:40:27,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 09:40:27,915 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 09:40:27,915 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 09:40:27,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 09:40:27,916 INFO L85 PathProgramCache]: Analyzing trace with hash -826019379, now seen corresponding path program 3 times [2022-01-10 09:40:27,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 09:40:27,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046210774] [2022-01-10 09:40:27,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 09:40:27,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 09:40:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 09:40:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-01-10 09:40:28,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 09:40:28,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046210774] [2022-01-10 09:40:28,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046210774] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 09:40:28,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185361118] [2022-01-10 09:40:28,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 09:40:28,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 09:40:28,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 09:40:28,078 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 09:40:28,100 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 09:40:30,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-10 09:40:30,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 09:40:30,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-10 09:40:30,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 09:40:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-01-10 09:40:30,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 09:40:52,972 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-01-10 09:40:52,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185361118] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 09:40:52,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 09:40:52,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 15] total 27 [2022-01-10 09:40:52,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488884152] [2022-01-10 09:40:52,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 09:40:52,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-10 09:40:52,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 09:40:52,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-10 09:40:52,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=511, Unknown=1, NotChecked=0, Total=702 [2022-01-10 09:40:52,973 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)