/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/verifythis/elimination_max_rec.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 00:15:43,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 00:15:43,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 00:15:43,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-11 00:15:43,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 00:15:43,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 00:15:43,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 00:15:43,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 00:15:43,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 00:15:43,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 00:15:43,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 00:15:43,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 00:15:43,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 00:15:43,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 00:15:43,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 00:15:43,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 00:15:43,699 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-11 00:15:43,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 00:15:43,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 00:15:43,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 00:15:43,715 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 [2022-01-11 00:15:43,744 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 00:15:43,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 00:15:43,745 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 00:15:43,745 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 00:15:43,746 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 00:15:43,746 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 00:15:43,746 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 00:15:43,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 00:15:43,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 00:15:43,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 00:15:43,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 00:15:43,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 00:15:43,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 00:15:43,747 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 00:15:43,747 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 00:15:43,747 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 00:15:43,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 00:15:43,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 00:15:43,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 00:15:43,748 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 00:15:43,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 00:15:43,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 00:15:43,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 00:15:43,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 00:15:43,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 00:15:43,749 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 00:15:43,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 00:15:43,749 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 00:15:43,749 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 00:15:43,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 00:15:43,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 00:15:43,749 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 00:15:43,750 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 00:15:43,750 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 00:15:43,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 00:15:43,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 00:15:43,948 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 00:15:43,949 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 00:15:43,949 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 00:15:43,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/elimination_max_rec.c [2022-01-11 00:15:44,010 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a42e22fb/ea1c83bd0cad42ccbe60e13aa770bbc1/FLAGbd22b576c [2022-01-11 00:15:44,402 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 00:15:44,402 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/elimination_max_rec.c [2022-01-11 00:15:44,407 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a42e22fb/ea1c83bd0cad42ccbe60e13aa770bbc1/FLAGbd22b576c [2022-01-11 00:15:44,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a42e22fb/ea1c83bd0cad42ccbe60e13aa770bbc1 [2022-01-11 00:15:44,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 00:15:44,420 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 00:15:44,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 00:15:44,422 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 00:15:44,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 00:15:44,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:15:44" (1/1) ... [2022-01-11 00:15:44,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13279b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:15:44, skipping insertion in model container [2022-01-11 00:15:44,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 12:15:44" (1/1) ... [2022-01-11 00:15:44,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 00:15:44,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 00:15:44,566 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/elimination_max_rec.c[493,506] [2022-01-11 00:15:44,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 00:15:44,603 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 00:15:44,627 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/verifythis/elimination_max_rec.c[493,506] [2022-01-11 00:15:44,639 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 00:15:44,650 INFO L208 MainTranslator]: Completed translation [2022-01-11 00:15:44,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:15:44 WrapperNode [2022-01-11 00:15:44,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 00:15:44,651 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 00:15:44,651 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 00:15:44,651 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 00:15:44,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:15:44" (1/1) ... [2022-01-11 00:15:44,662 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:15:44" (1/1) ... [2022-01-11 00:15:44,679 INFO L137 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 78 [2022-01-11 00:15:44,679 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 00:15:44,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 00:15:44,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 00:15:44,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 00:15:44,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:15:44" (1/1) ... [2022-01-11 00:15:44,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:15:44" (1/1) ... [2022-01-11 00:15:44,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:15:44" (1/1) ... [2022-01-11 00:15:44,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:15:44" (1/1) ... [2022-01-11 00:15:44,696 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:15:44" (1/1) ... [2022-01-11 00:15:44,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:15:44" (1/1) ... [2022-01-11 00:15:44,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:15:44" (1/1) ... [2022-01-11 00:15:44,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 00:15:44,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 00:15:44,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 00:15:44,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 00:15:44,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:15:44" (1/1) ... [2022-01-11 00:15:44,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 00:15:44,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:15:44,760 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) [2022-01-11 00:15:44,781 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 [2022-01-11 00:15:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 00:15:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 00:15:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-01-11 00:15:44,795 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-01-11 00:15:44,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-11 00:15:44,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-11 00:15:44,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 00:15:44,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 00:15:44,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-11 00:15:44,858 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 00:15:44,859 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 00:15:44,998 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 00:15:45,003 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 00:15:45,003 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-11 00:15:45,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:15:45 BoogieIcfgContainer [2022-01-11 00:15:45,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 00:15:45,005 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 00:15:45,005 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 00:15:45,006 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 00:15:45,008 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:15:45" (1/1) ... [2022-01-11 00:15:45,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:15:45 BasicIcfg [2022-01-11 00:15:45,159 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 00:15:45,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 00:15:45,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 00:15:45,163 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 00:15:45,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 12:15:44" (1/4) ... [2022-01-11 00:15:45,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560ed10f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:15:45, skipping insertion in model container [2022-01-11 00:15:45,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 12:15:44" (2/4) ... [2022-01-11 00:15:45,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560ed10f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 12:15:45, skipping insertion in model container [2022-01-11 00:15:45,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 12:15:45" (3/4) ... [2022-01-11 00:15:45,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560ed10f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 12:15:45, skipping insertion in model container [2022-01-11 00:15:45,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 12:15:45" (4/4) ... [2022-01-11 00:15:45,165 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.cTransformedIcfg [2022-01-11 00:15:45,169 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 00:15:45,169 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-11 00:15:45,230 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 00:15:45,239 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 [2022-01-11 00:15:45,239 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-11 00:15:45,255 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-11 00:15:45,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 00:15:45,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:15:45,259 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:15:45,259 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:15:45,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:15:45,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2060906134, now seen corresponding path program 1 times [2022-01-11 00:15:45,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:15:45,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397370997] [2022-01-11 00:15:45,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:15:45,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:15:45,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:15:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 00:15:45,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:15:45,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397370997] [2022-01-11 00:15:45,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397370997] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:15:45,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:15:45,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 00:15:45,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584070842] [2022-01-11 00:15:45,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:15:45,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 00:15:45,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:15:45,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 00:15:45,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 00:15:45,472 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 00:15:45,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:15:45,489 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2022-01-11 00:15:45,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 00:15:45,492 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-11 00:15:45,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:15:45,497 INFO L225 Difference]: With dead ends: 53 [2022-01-11 00:15:45,498 INFO L226 Difference]: Without dead ends: 24 [2022-01-11 00:15:45,514 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 [2022-01-11 00:15:45,517 INFO L933 BasicCegarLoop]: 31 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, 31 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 [2022-01-11 00:15:45,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 00:15:45,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-11 00:15:45,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-11 00:15:45,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 00:15:45,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-01-11 00:15:45,558 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 11 [2022-01-11 00:15:45,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:15:45,558 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-01-11 00:15:45,559 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 00:15:45,560 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-01-11 00:15:45,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-11 00:15:45,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:15:45,562 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:15:45,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 00:15:45,563 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:15:45,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:15:45,565 INFO L85 PathProgramCache]: Analyzing trace with hash 426606699, now seen corresponding path program 1 times [2022-01-11 00:15:45,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:15:45,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478780734] [2022-01-11 00:15:45,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:15:45,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:15:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:15:45,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 00:15:45,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:15:45,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478780734] [2022-01-11 00:15:45,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478780734] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:15:45,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:15:45,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-11 00:15:45,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987371261] [2022-01-11 00:15:45,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:15:45,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-11 00:15:45,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:15:45,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-11 00:15:45,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-11 00:15:45,926 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 00:15:46,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:15:46,045 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-01-11 00:15:46,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-11 00:15:46,046 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-11 00:15:46,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:15:46,046 INFO L225 Difference]: With dead ends: 48 [2022-01-11 00:15:46,047 INFO L226 Difference]: Without dead ends: 25 [2022-01-11 00:15:46,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-11 00:15:46,052 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 00:15:46,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 107 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 00:15:46,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-11 00:15:46,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-11 00:15:46,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-11 00:15:46,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-01-11 00:15:46,057 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 11 [2022-01-11 00:15:46,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:15:46,057 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-01-11 00:15:46,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 00:15:46,058 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-01-11 00:15:46,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-11 00:15:46,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:15:46,058 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:15:46,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-11 00:15:46,059 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:15:46,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:15:46,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1973990634, now seen corresponding path program 1 times [2022-01-11 00:15:46,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:15:46,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283725375] [2022-01-11 00:15:46,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:15:46,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:15:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:15:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 00:15:46,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:15:46,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283725375] [2022-01-11 00:15:46,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283725375] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 00:15:46,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 00:15:46,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-11 00:15:46,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030591806] [2022-01-11 00:15:46,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 00:15:46,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-11 00:15:46,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:15:46,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-11 00:15:46,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-11 00:15:46,439 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 00:15:46,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:15:46,622 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-01-11 00:15:46,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-11 00:15:46,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-11 00:15:46,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:15:46,625 INFO L225 Difference]: With dead ends: 46 [2022-01-11 00:15:46,625 INFO L226 Difference]: Without dead ends: 39 [2022-01-11 00:15:46,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-11 00:15:46,626 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 00:15:46,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 111 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 00:15:46,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-11 00:15:46,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2022-01-11 00:15:46,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-11 00:15:46,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-01-11 00:15:46,638 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 12 [2022-01-11 00:15:46,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:15:46,639 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-01-11 00:15:46,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 00:15:46,639 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-01-11 00:15:46,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-11 00:15:46,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:15:46,641 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:15:46,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-11 00:15:46,641 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:15:46,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:15:46,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1087383764, now seen corresponding path program 1 times [2022-01-11 00:15:46,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:15:46,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143228508] [2022-01-11 00:15:46,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:15:46,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:15:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:15:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 00:15:47,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:15:47,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143228508] [2022-01-11 00:15:47,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143228508] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:15:47,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263656549] [2022-01-11 00:15:47,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:15:47,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:15:47,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:15:47,187 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) [2022-01-11 00:15:47,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 00:15:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:15:47,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-11 00:15:47,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:15:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 00:15:47,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:15:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-11 00:15:48,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263656549] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 00:15:48,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-11 00:15:48,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 24 [2022-01-11 00:15:48,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12578408] [2022-01-11 00:15:48,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-11 00:15:48,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-11 00:15:48,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 00:15:48,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-11 00:15:48,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-01-11 00:15:48,536 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 18 states have internal predecessors, (36), 5 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 00:15:59,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 00:15:59,677 INFO L93 Difference]: Finished difference Result 222 states and 267 transitions. [2022-01-11 00:15:59,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-11 00:15:59,677 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 18 states have internal predecessors, (36), 5 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-11 00:15:59,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 00:15:59,680 INFO L225 Difference]: With dead ends: 222 [2022-01-11 00:15:59,680 INFO L226 Difference]: Without dead ends: 220 [2022-01-11 00:15:59,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2148 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1201, Invalid=5605, Unknown=0, NotChecked=0, Total=6806 [2022-01-11 00:15:59,687 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 714 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-11 00:15:59,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 576 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-11 00:15:59,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-01-11 00:15:59,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 121. [2022-01-11 00:15:59,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.263157894736842) internal successors, (120), 104 states have internal predecessors, (120), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (16), 8 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-11 00:15:59,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 153 transitions. [2022-01-11 00:15:59,728 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 153 transitions. Word has length 18 [2022-01-11 00:15:59,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 00:15:59,729 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 153 transitions. [2022-01-11 00:15:59,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 18 states have internal predecessors, (36), 5 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-11 00:15:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 153 transitions. [2022-01-11 00:15:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-11 00:15:59,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 00:15:59,730 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 00:15:59,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-11 00:15:59,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:15:59,931 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr1ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION, checkErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 00:15:59,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 00:15:59,932 INFO L85 PathProgramCache]: Analyzing trace with hash -263773961, now seen corresponding path program 1 times [2022-01-11 00:15:59,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 00:15:59,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802854549] [2022-01-11 00:15:59,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:15:59,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 00:16:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:16:00,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-01-11 00:16:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:16:00,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 00:16:00,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 00:16:00,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802854549] [2022-01-11 00:16:00,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802854549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-11 00:16:00,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623508910] [2022-01-11 00:16:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 00:16:00,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 00:16:00,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 00:16:00,478 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) [2022-01-11 00:16:00,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 00:16:01,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 00:16:01,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-11 00:16:01,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 00:16:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 00:16:03,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 00:16:46,652 WARN L228 SmtUtils]: Spent 5.33s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)