/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 21:04:35,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 21:04:35,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 21:04:35,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 21:04:35,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 21:04:35,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 21:04:35,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 21:04:35,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 21:04:35,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 21:04:35,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 21:04:35,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 21:04:35,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 21:04:35,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 21:04:35,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 21:04:35,227 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 21:04:35,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 21:04:35,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 21:04:35,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 21:04:35,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 21:04:35,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 21:04:35,239 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-10 21:04:35,305 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 21:04:35,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 21:04:35,306 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 21:04:35,306 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 21:04:35,307 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 21:04:35,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 21:04:35,307 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 21:04:35,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 21:04:35,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 21:04:35,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 21:04:35,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 21:04:35,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 21:04:35,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 21:04:35,309 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 21:04:35,309 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 21:04:35,309 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 21:04:35,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 21:04:35,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 21:04:35,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 21:04:35,309 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 21:04:35,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 21:04:35,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:04:35,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 21:04:35,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 21:04:35,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 21:04:35,310 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 21:04:35,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 21:04:35,311 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 21:04:35,311 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 21:04:35,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 21:04:35,311 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 21:04:35,311 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 21:04:35,312 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 21:04:35,312 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 21:04:35,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 21:04:35,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 21:04:35,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 21:04:35,525 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 21:04:35,527 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 21:04:35,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_2_ground.i [2022-01-10 21:04:35,588 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed6a87082/d0482e6eb73e465ab0ec0b735e052c5f/FLAGa070c23e6 [2022-01-10 21:04:35,910 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 21:04:35,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_2_ground.i [2022-01-10 21:04:35,914 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed6a87082/d0482e6eb73e465ab0ec0b735e052c5f/FLAGa070c23e6 [2022-01-10 21:04:36,338 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed6a87082/d0482e6eb73e465ab0ec0b735e052c5f [2022-01-10 21:04:36,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 21:04:36,341 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 21:04:36,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 21:04:36,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 21:04:36,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 21:04:36,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:04:36" (1/1) ... [2022-01-10 21:04:36,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e5da873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:36, skipping insertion in model container [2022-01-10 21:04:36,350 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 09:04:36" (1/1) ... [2022-01-10 21:04:36,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 21:04:36,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 21:04:36,502 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-examples/sorting_bubblesort_2_ground.i[820,833] [2022-01-10 21:04:36,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:04:36,533 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 21:04:36,551 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-examples/sorting_bubblesort_2_ground.i[820,833] [2022-01-10 21:04:36,608 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 21:04:36,626 INFO L208 MainTranslator]: Completed translation [2022-01-10 21:04:36,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:36 WrapperNode [2022-01-10 21:04:36,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 21:04:36,628 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 21:04:36,628 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 21:04:36,628 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 21:04:36,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:36" (1/1) ... [2022-01-10 21:04:36,648 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:36" (1/1) ... [2022-01-10 21:04:36,670 INFO L137 Inliner]: procedures = 18, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2022-01-10 21:04:36,671 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 21:04:36,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 21:04:36,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 21:04:36,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 21:04:36,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:36" (1/1) ... [2022-01-10 21:04:36,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:36" (1/1) ... [2022-01-10 21:04:36,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:36" (1/1) ... [2022-01-10 21:04:36,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:36" (1/1) ... [2022-01-10 21:04:36,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:36" (1/1) ... [2022-01-10 21:04:36,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:36" (1/1) ... [2022-01-10 21:04:36,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:36" (1/1) ... [2022-01-10 21:04:36,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 21:04:36,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 21:04:36,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 21:04:36,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 21:04:36,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:36" (1/1) ... [2022-01-10 21:04:36,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 21:04:36,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:04:36,727 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 21:04:36,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 21:04:36,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 21:04:36,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 21:04:36,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 21:04:36,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 21:04:36,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 21:04:36,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 21:04:36,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 21:04:36,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 21:04:36,807 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 21:04:36,808 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 21:04:36,963 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 21:04:36,967 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 21:04:36,968 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-10 21:04:36,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:04:36 BoogieIcfgContainer [2022-01-10 21:04:36,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 21:04:36,970 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 21:04:36,970 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 21:04:36,971 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 21:04:36,973 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:04:36" (1/1) ... [2022-01-10 21:04:37,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:04:37 BasicIcfg [2022-01-10 21:04:37,120 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 21:04:37,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 21:04:37,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 21:04:37,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 21:04:37,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 09:04:36" (1/4) ... [2022-01-10 21:04:37,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10777eae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:04:37, skipping insertion in model container [2022-01-10 21:04:37,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 09:04:36" (2/4) ... [2022-01-10 21:04:37,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10777eae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 09:04:37, skipping insertion in model container [2022-01-10 21:04:37,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 09:04:36" (3/4) ... [2022-01-10 21:04:37,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10777eae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 09:04:37, skipping insertion in model container [2022-01-10 21:04:37,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 09:04:37" (4/4) ... [2022-01-10 21:04:37,127 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_2_ground.iTransformedIcfg [2022-01-10 21:04:37,132 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 21:04:37,132 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 21:04:37,162 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 21:04:37,168 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 21:04:37,168 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 21:04:37,176 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:04:37,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 21:04:37,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:04:37,180 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:04:37,180 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:04:37,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:04:37,185 INFO L85 PathProgramCache]: Analyzing trace with hash -2145212784, now seen corresponding path program 1 times [2022-01-10 21:04:37,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:04:37,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793097492] [2022-01-10 21:04:37,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:04:37,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:04:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:04:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:04:37,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:04:37,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793097492] [2022-01-10 21:04:37,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793097492] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:04:37,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:04:37,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 21:04:37,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376274976] [2022-01-10 21:04:37,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:04:37,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 21:04:37,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:04:37,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 21:04:37,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 21:04:37,422 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 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 21:04:37,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:04:37,439 INFO L93 Difference]: Finished difference Result 40 states and 60 transitions. [2022-01-10 21:04:37,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 21:04:37,441 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 21:04:37,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:04:37,447 INFO L225 Difference]: With dead ends: 40 [2022-01-10 21:04:37,447 INFO L226 Difference]: Without dead ends: 18 [2022-01-10 21:04:37,450 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 21:04:37,454 INFO L933 BasicCegarLoop]: 27 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, 27 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 21:04:37,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 21:04:37,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-01-10 21:04:37,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-01-10 21:04:37,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 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 21:04:37,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2022-01-10 21:04:37,490 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2022-01-10 21:04:37,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:04:37,490 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2022-01-10 21:04:37,490 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 21:04:37,490 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2022-01-10 21:04:37,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 21:04:37,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:04:37,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:04:37,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 21:04:37,492 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:04:37,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:04:37,492 INFO L85 PathProgramCache]: Analyzing trace with hash -402402449, now seen corresponding path program 1 times [2022-01-10 21:04:37,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:04:37,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021167208] [2022-01-10 21:04:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:04:37,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:04:37,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:04:37,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 21:04:37,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:04:37,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021167208] [2022-01-10 21:04:37,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021167208] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:04:37,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:04:37,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:04:37,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410391625] [2022-01-10 21:04:37,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:04:37,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:04:37,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:04:37,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:04:37,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:04:37,582 INFO L87 Difference]: Start difference. First operand 18 states and 23 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 21:04:37,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:04:37,606 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2022-01-10 21:04:37,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:04:37,607 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 21:04:37,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:04:37,607 INFO L225 Difference]: With dead ends: 31 [2022-01-10 21:04:37,607 INFO L226 Difference]: Without dead ends: 22 [2022-01-10 21:04:37,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:04:37,609 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:04:37,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 21:04:37,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-10 21:04:37,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-10 21:04:37,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:04:37,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2022-01-10 21:04:37,614 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 10 [2022-01-10 21:04:37,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:04:37,614 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2022-01-10 21:04:37,614 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 21:04:37,615 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2022-01-10 21:04:37,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 21:04:37,615 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:04:37,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:04:37,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 21:04:37,616 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:04:37,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:04:37,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1179262894, now seen corresponding path program 1 times [2022-01-10 21:04:37,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:04:37,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437472151] [2022-01-10 21:04:37,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:04:37,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:04:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:04:37,699 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 21:04:37,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:04:37,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437472151] [2022-01-10 21:04:37,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437472151] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:04:37,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:04:37,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:04:37,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363866487] [2022-01-10 21:04:37,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:04:37,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:04:37,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:04:37,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:04:37,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:04:37,702 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. 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 21:04:37,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:04:37,720 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2022-01-10 21:04:37,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:04:37,724 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 21:04:37,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:04:37,725 INFO L225 Difference]: With dead ends: 42 [2022-01-10 21:04:37,725 INFO L226 Difference]: Without dead ends: 24 [2022-01-10 21:04:37,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:04:37,727 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 21:04:37,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 21:04:37,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-10 21:04:37,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-01-10 21:04:37,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:04:37,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-01-10 21:04:37,732 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2022-01-10 21:04:37,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:04:37,732 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-01-10 21:04:37,733 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 21:04:37,733 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-01-10 21:04:37,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-10 21:04:37,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:04:37,734 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:04:37,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 21:04:37,734 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:04:37,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:04:37,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1139349292, now seen corresponding path program 1 times [2022-01-10 21:04:37,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:04:37,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996165129] [2022-01-10 21:04:37,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:04:37,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:04:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:04:37,833 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 21:04:37,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:04:37,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996165129] [2022-01-10 21:04:37,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996165129] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 21:04:37,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 21:04:37,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 21:04:37,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853167792] [2022-01-10 21:04:37,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 21:04:37,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 21:04:37,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:04:37,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 21:04:37,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:04:37,836 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:04:37,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:04:37,922 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2022-01-10 21:04:37,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 21:04:37,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-01-10 21:04:37,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:04:37,924 INFO L225 Difference]: With dead ends: 44 [2022-01-10 21:04:37,925 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 21:04:37,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 21:04:37,926 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:04:37,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 37 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 21:04:37,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 21:04:37,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-01-10 21:04:37,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:04:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-01-10 21:04:37,931 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2022-01-10 21:04:37,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:04:37,931 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-01-10 21:04:37,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:04:37,932 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-01-10 21:04:37,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 21:04:37,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:04:37,932 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:04:37,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 21:04:37,933 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:04:37,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:04:37,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1191381440, now seen corresponding path program 1 times [2022-01-10 21:04:37,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:04:37,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47171244] [2022-01-10 21:04:37,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:04:37,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:04:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:04:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 21:04:38,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:04:38,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47171244] [2022-01-10 21:04:38,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47171244] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:04:38,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890114621] [2022-01-10 21:04:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:04:38,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:04:38,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:04:38,087 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 21:04:38,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 21:04:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:04:38,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 21:04:38,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:04:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 21:04:38,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:04:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 21:04:38,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890114621] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:04:38,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 21:04:38,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2022-01-10 21:04:38,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630390504] [2022-01-10 21:04:38,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 21:04:38,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 21:04:38,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:04:38,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 21:04:38,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-10 21:04:38,535 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:04:38,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:04:38,645 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2022-01-10 21:04:38,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 21:04:38,647 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 17 [2022-01-10 21:04:38,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:04:38,647 INFO L225 Difference]: With dead ends: 50 [2022-01-10 21:04:38,648 INFO L226 Difference]: Without dead ends: 31 [2022-01-10 21:04:38,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-10 21:04:38,649 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 21:04:38,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 92 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 21:04:38,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-10 21:04:38,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-01-10 21:04:38,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 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 21:04:38,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-01-10 21:04:38,653 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2022-01-10 21:04:38,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:04:38,654 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-01-10 21:04:38,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:04:38,654 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-01-10 21:04:38,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 21:04:38,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:04:38,655 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:04:38,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 21:04:38,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:04:38,855 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:04:38,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:04:38,856 INFO L85 PathProgramCache]: Analyzing trace with hash 430910842, now seen corresponding path program 2 times [2022-01-10 21:04:38,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:04:38,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967871912] [2022-01-10 21:04:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:04:38,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:04:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:04:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 21:04:39,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:04:39,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967871912] [2022-01-10 21:04:39,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967871912] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:04:39,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960337163] [2022-01-10 21:04:39,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 21:04:39,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:04:39,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:04:39,004 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 21:04:39,005 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 21:04:39,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 21:04:39,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:04:39,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 21:04:39,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:04:39,418 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 21:04:39,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:04:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 21:04:39,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960337163] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:04:39,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 21:04:39,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-10 21:04:39,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260295564] [2022-01-10 21:04:39,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 21:04:39,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 21:04:39,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:04:39,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 21:04:39,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 21:04:39,482 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:04:39,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:04:39,688 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2022-01-10 21:04:39,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 21:04:39,692 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 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 21:04:39,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:04:39,692 INFO L225 Difference]: With dead ends: 65 [2022-01-10 21:04:39,692 INFO L226 Difference]: Without dead ends: 47 [2022-01-10 21:04:39,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-10 21:04:39,693 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 21:04:39,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 73 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 21:04:39,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-10 21:04:39,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-01-10 21:04:39,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:04:39,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-01-10 21:04:39,701 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 23 [2022-01-10 21:04:39,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:04:39,701 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-01-10 21:04:39,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:04:39,702 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-01-10 21:04:39,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-10 21:04:39,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:04:39,702 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:04:39,715 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 21:04:39,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-01-10 21:04:39,916 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:04:39,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:04:39,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1614055258, now seen corresponding path program 3 times [2022-01-10 21:04:39,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:04:39,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165149459] [2022-01-10 21:04:39,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:04:39,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:04:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:04:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 21:04:40,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:04:40,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165149459] [2022-01-10 21:04:40,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165149459] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:04:40,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441772033] [2022-01-10 21:04:40,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 21:04:40,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:04:40,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:04:40,117 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 21:04:40,119 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 21:04:41,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-10 21:04:41,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:04:41,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-10 21:04:41,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:04:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 21:04:41,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:04:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-10 21:04:42,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441772033] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:04:42,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 21:04:42,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-10 21:04:42,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679643717] [2022-01-10 21:04:42,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 21:04:42,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 21:04:42,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:04:42,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 21:04:42,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-01-10 21:04:42,561 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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 21:04:48,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:04:48,175 INFO L93 Difference]: Finished difference Result 93 states and 121 transitions. [2022-01-10 21:04:48,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 21:04:48,179 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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) Word has length 32 [2022-01-10 21:04:48,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:04:48,180 INFO L225 Difference]: With dead ends: 93 [2022-01-10 21:04:48,180 INFO L226 Difference]: Without dead ends: 57 [2022-01-10 21:04:48,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2022-01-10 21:04:48,181 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 21:04:48,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 154 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 10 Unchecked, 0.3s Time] [2022-01-10 21:04:48,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-10 21:04:48,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-01-10 21:04:48,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 56 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:04:48,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-01-10 21:04:48,209 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 32 [2022-01-10 21:04:48,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:04:48,209 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-01-10 21:04:48,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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 21:04:48,210 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-01-10 21:04:48,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 21:04:48,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:04:48,210 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:04:48,217 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 21:04:48,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:04:48,417 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:04:48,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:04:48,417 INFO L85 PathProgramCache]: Analyzing trace with hash -993930268, now seen corresponding path program 4 times [2022-01-10 21:04:48,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:04:48,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222187474] [2022-01-10 21:04:48,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:04:48,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:04:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:04:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-10 21:04:48,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:04:48,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222187474] [2022-01-10 21:04:48,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222187474] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:04:48,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315728393] [2022-01-10 21:04:48,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 21:04:48,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:04:48,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:04:48,642 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 21:04:48,643 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 21:04:49,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 21:04:49,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 21:04:49,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-10 21:04:49,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 21:04:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 91 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 21:04:50,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 21:04:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-10 21:04:59,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315728393] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 21:04:59,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 21:04:59,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 8] total 23 [2022-01-10 21:04:59,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809932704] [2022-01-10 21:04:59,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 21:04:59,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-10 21:04:59,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 21:04:59,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-10 21:04:59,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=408, Unknown=2, NotChecked=0, Total=506 [2022-01-10 21:04:59,535 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 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 21:05:01,542 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-01-10 21:05:21,529 WARN L228 SmtUtils]: Spent 14.24s on a formula simplification. DAG size of input: 39 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 21:05:27,391 WARN L228 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 37 DAG size of output: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-10 21:05:34,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 21:05:34,941 INFO L93 Difference]: Finished difference Result 129 states and 174 transitions. [2022-01-10 21:05:34,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 21:05:34,942 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 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 42 [2022-01-10 21:05:34,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 21:05:34,944 INFO L225 Difference]: With dead ends: 129 [2022-01-10 21:05:34,944 INFO L226 Difference]: Without dead ends: 94 [2022-01-10 21:05:34,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 40.4s TimeCoverageRelationStatistics Valid=156, Invalid=598, Unknown=2, NotChecked=0, Total=756 [2022-01-10 21:05:34,946 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 63 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-10 21:05:34,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 288 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 261 Invalid, 1 Unknown, 15 Unchecked, 3.6s Time] [2022-01-10 21:05:34,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-10 21:05:34,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2022-01-10 21:05:34,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.2674418604651163) internal successors, (109), 86 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 21:05:34,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2022-01-10 21:05:34,961 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 42 [2022-01-10 21:05:34,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 21:05:34,961 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2022-01-10 21:05:34,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 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 21:05:34,961 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2022-01-10 21:05:34,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 21:05:34,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 21:05:34,963 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 21:05:34,972 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 21:05:35,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:05:35,168 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 21:05:35,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 21:05:35,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2114794576, now seen corresponding path program 5 times [2022-01-10 21:05:35,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 21:05:35,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599511003] [2022-01-10 21:05:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 21:05:35,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 21:05:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 21:05:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-01-10 21:05:35,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 21:05:35,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599511003] [2022-01-10 21:05:35,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599511003] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 21:05:35,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522388574] [2022-01-10 21:05:35,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 21:05:35,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 21:05:35,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 21:05:35,482 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 21:05:35,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process