/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/loops-crafted-1/nested5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 01:41:02,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 01:41:02,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 01:41:02,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 01:41:02,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 01:41:02,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 01:41:02,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 01:41:02,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 01:41:02,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 01:41:02,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 01:41:02,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 01:41:02,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 01:41:02,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 01:41:02,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 01:41:02,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 01:41:02,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 01:41:02,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 01:41:02,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 01:41:02,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 01:41:02,861 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 01:41:02,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 01:41:02,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 01:41:02,864 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 01:41:02,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 01:41:02,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 01:41:02,868 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 01:41:02,868 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 01:41:02,869 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 01:41:02,869 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 01:41:02,870 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 01:41:02,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 01:41:02,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 01:41:02,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 01:41:02,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 01:41:02,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 01:41:02,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 01:41:02,873 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 01:41:02,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 01:41:02,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 01:41:02,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 01:41:02,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 01:41:02,875 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 01:41:02,896 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 01:41:02,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 01:41:02,896 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 01:41:02,896 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 01:41:02,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 01:41:02,897 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 01:41:02,898 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 01:41:02,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 01:41:02,898 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 01:41:02,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 01:41:02,899 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 01:41:02,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 01:41:02,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 01:41:02,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 01:41:02,899 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 01:41:02,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 01:41:02,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 01:41:02,900 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 01:41:02,900 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 01:41:02,900 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 01:41:02,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 01:41:02,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 01:41:02,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 01:41:02,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 01:41:02,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:41:02,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 01:41:02,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 01:41:02,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 01:41:02,902 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 01:41:02,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 01:41:02,902 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 01:41:02,902 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 01:41:02,902 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 01:41:02,902 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 01:41:02,903 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 01:41:02,903 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 01:41:03,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 01:41:03,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 01:41:03,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 01:41:03,147 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 01:41:03,148 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 01:41:03,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/nested5-2.c [2023-04-02 01:41:04,192 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 01:41:04,344 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 01:41:04,345 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested5-2.c [2023-04-02 01:41:04,349 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80f4594f1/b635f7ea59c749478df552d2c13e80b7/FLAG74420eebe [2023-04-02 01:41:04,365 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80f4594f1/b635f7ea59c749478df552d2c13e80b7 [2023-04-02 01:41:04,367 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 01:41:04,369 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 01:41:04,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 01:41:04,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 01:41:04,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 01:41:04,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:41:04" (1/1) ... [2023-04-02 01:41:04,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ee846d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:04, skipping insertion in model container [2023-04-02 01:41:04,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:41:04" (1/1) ... [2023-04-02 01:41:04,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 01:41:04,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 01:41:04,540 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested5-2.c[321,334] [2023-04-02 01:41:04,561 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:41:04,573 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 01:41:04,583 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested5-2.c[321,334] [2023-04-02 01:41:04,592 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:41:04,605 INFO L208 MainTranslator]: Completed translation [2023-04-02 01:41:04,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:04 WrapperNode [2023-04-02 01:41:04,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 01:41:04,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 01:41:04,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 01:41:04,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 01:41:04,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:04" (1/1) ... [2023-04-02 01:41:04,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:04" (1/1) ... [2023-04-02 01:41:04,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:04" (1/1) ... [2023-04-02 01:41:04,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:04" (1/1) ... [2023-04-02 01:41:04,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:04" (1/1) ... [2023-04-02 01:41:04,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:04" (1/1) ... [2023-04-02 01:41:04,644 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:04" (1/1) ... [2023-04-02 01:41:04,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:04" (1/1) ... [2023-04-02 01:41:04,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 01:41:04,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 01:41:04,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 01:41:04,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 01:41:04,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:04" (1/1) ... [2023-04-02 01:41:04,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:41:04,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:41:04,682 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) [2023-04-02 01:41:04,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 01:41:04,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 01:41:04,721 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 01:41:04,722 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 01:41:04,722 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 01:41:04,722 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 01:41:04,722 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 01:41:04,723 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 01:41:04,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 01:41:04,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 01:41:04,723 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 01:41:04,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 01:41:04,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 01:41:04,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 01:41:04,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 01:41:04,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 01:41:04,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 01:41:04,713 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 [2023-04-02 01:41:04,790 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 01:41:04,793 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 01:41:04,917 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 01:41:04,924 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 01:41:04,924 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-02 01:41:04,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:41:04 BoogieIcfgContainer [2023-04-02 01:41:04,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 01:41:04,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 01:41:04,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 01:41:04,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 01:41:04,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:41:04" (1/3) ... [2023-04-02 01:41:04,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5815555c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:41:04, skipping insertion in model container [2023-04-02 01:41:04,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:41:04" (2/3) ... [2023-04-02 01:41:04,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5815555c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:41:04, skipping insertion in model container [2023-04-02 01:41:04,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:41:04" (3/3) ... [2023-04-02 01:41:04,934 INFO L112 eAbstractionObserver]: Analyzing ICFG nested5-2.c [2023-04-02 01:41:04,949 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 01:41:04,949 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 01:41:04,989 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 01:41:04,994 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5b214415, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 01:41:04,995 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 01:41:04,998 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:41:05,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 01:41:05,004 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:41:05,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:41:05,005 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:41:05,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:41:05,010 INFO L85 PathProgramCache]: Analyzing trace with hash -531959740, now seen corresponding path program 1 times [2023-04-02 01:41:05,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:41:05,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996093566] [2023-04-02 01:41:05,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:41:05,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:41:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:05,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:41:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:41:05,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:41:05,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996093566] [2023-04-02 01:41:05,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996093566] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:41:05,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:41:05,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 01:41:05,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216692339] [2023-04-02 01:41:05,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:41:05,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 01:41:05,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:41:05,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 01:41:05,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 01:41:05,296 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:41:05,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:41:05,407 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2023-04-02 01:41:05,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 01:41:05,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-02 01:41:05,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:41:05,415 INFO L225 Difference]: With dead ends: 50 [2023-04-02 01:41:05,416 INFO L226 Difference]: Without dead ends: 23 [2023-04-02 01:41:05,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 01:41:05,421 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:41:05,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 10 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:41:05,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-02 01:41:05,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-02 01:41:05,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:41:05,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-04-02 01:41:05,459 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2023-04-02 01:41:05,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:41:05,459 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-04-02 01:41:05,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:41:05,460 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-04-02 01:41:05,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 01:41:05,461 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:41:05,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:41:05,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 01:41:05,461 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:41:05,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:41:05,462 INFO L85 PathProgramCache]: Analyzing trace with hash -537500866, now seen corresponding path program 1 times [2023-04-02 01:41:05,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:41:05,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282566132] [2023-04-02 01:41:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:41:05,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:41:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:05,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:41:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:41:05,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:41:05,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282566132] [2023-04-02 01:41:05,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282566132] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:41:05,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:41:05,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 01:41:05,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217611089] [2023-04-02 01:41:05,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:41:05,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 01:41:05,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:41:05,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 01:41:05,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 01:41:05,621 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:41:05,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:41:05,760 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2023-04-02 01:41:05,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 01:41:05,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-02 01:41:05,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:41:05,762 INFO L225 Difference]: With dead ends: 49 [2023-04-02 01:41:05,762 INFO L226 Difference]: Without dead ends: 32 [2023-04-02 01:41:05,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:41:05,764 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:41:05,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 12 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:41:05,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-02 01:41:05,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2023-04-02 01:41:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:41:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-04-02 01:41:05,772 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2023-04-02 01:41:05,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:41:05,772 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-04-02 01:41:05,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:41:05,774 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-04-02 01:41:05,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 01:41:05,780 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:41:05,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:41:05,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 01:41:05,781 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:41:05,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:41:05,782 INFO L85 PathProgramCache]: Analyzing trace with hash -509289700, now seen corresponding path program 1 times [2023-04-02 01:41:05,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:41:05,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005427752] [2023-04-02 01:41:05,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:41:05,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:41:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:05,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:41:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:05,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:41:05,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:41:05,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005427752] [2023-04-02 01:41:05,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005427752] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:41:05,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888930911] [2023-04-02 01:41:05,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:41:05,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:41:05,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:41:05,983 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) [2023-04-02 01:41:05,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 01:41:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:06,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 01:41:06,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:41:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:41:06,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:41:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:41:06,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888930911] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:41:06,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:41:06,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-02 01:41:06,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226618259] [2023-04-02 01:41:06,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:41:06,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 01:41:06,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:41:06,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 01:41:06,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-02 01:41:06,113 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:41:06,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:41:06,258 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2023-04-02 01:41:06,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 01:41:06,259 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-04-02 01:41:06,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:41:06,260 INFO L225 Difference]: With dead ends: 55 [2023-04-02 01:41:06,260 INFO L226 Difference]: Without dead ends: 37 [2023-04-02 01:41:06,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2023-04-02 01:41:06,261 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 60 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:41:06,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 17 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:41:06,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-02 01:41:06,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2023-04-02 01:41:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 01:41:06,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-04-02 01:41:06,269 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 17 [2023-04-02 01:41:06,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:41:06,269 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-04-02 01:41:06,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:41:06,270 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-04-02 01:41:06,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-02 01:41:06,270 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:41:06,270 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:41:06,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 01:41:06,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:41:06,476 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:41:06,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:41:06,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1312242250, now seen corresponding path program 2 times [2023-04-02 01:41:06,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:41:06,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378238902] [2023-04-02 01:41:06,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:41:06,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:41:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:06,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:41:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:06,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:41:06,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:41:06,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378238902] [2023-04-02 01:41:06,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378238902] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:41:06,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761330609] [2023-04-02 01:41:06,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:41:06,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:41:06,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:41:06,676 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) [2023-04-02 01:41:06,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 01:41:06,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:41:06,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:41:06,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 01:41:06,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:41:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:41:06,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:41:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 01:41:06,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761330609] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:41:06,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:41:06,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 17 [2023-04-02 01:41:06,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133810008] [2023-04-02 01:41:06,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:41:06,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 01:41:06,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:41:06,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 01:41:06,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-04-02 01:41:06,936 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:41:07,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:41:07,618 INFO L93 Difference]: Finished difference Result 101 states and 128 transitions. [2023-04-02 01:41:07,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 01:41:07,619 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-04-02 01:41:07,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:41:07,621 INFO L225 Difference]: With dead ends: 101 [2023-04-02 01:41:07,621 INFO L226 Difference]: Without dead ends: 77 [2023-04-02 01:41:07,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2023-04-02 01:41:07,623 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 141 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 01:41:07,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 72 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 01:41:07,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-04-02 01:41:07,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 43. [2023-04-02 01:41:07,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:41:07,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2023-04-02 01:41:07,639 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 23 [2023-04-02 01:41:07,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:41:07,640 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2023-04-02 01:41:07,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:41:07,640 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2023-04-02 01:41:07,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 01:41:07,641 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:41:07,641 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:41:07,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 01:41:07,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-02 01:41:07,847 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:41:07,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:41:07,847 INFO L85 PathProgramCache]: Analyzing trace with hash -2006417516, now seen corresponding path program 3 times [2023-04-02 01:41:07,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:41:07,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671888460] [2023-04-02 01:41:07,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:41:07,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:41:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:07,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:41:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:41:07,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:41:07,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671888460] [2023-04-02 01:41:07,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671888460] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:41:07,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45116907] [2023-04-02 01:41:07,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:41:07,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:41:07,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:41:07,998 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) [2023-04-02 01:41:08,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 01:41:08,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-02 01:41:08,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:41:08,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 01:41:08,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:41:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:41:08,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:41:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:41:08,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45116907] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:41:08,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:41:08,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2023-04-02 01:41:08,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844817573] [2023-04-02 01:41:08,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:41:08,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-02 01:41:08,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:41:08,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-02 01:41:08,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2023-04-02 01:41:08,217 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:41:08,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:41:08,836 INFO L93 Difference]: Finished difference Result 101 states and 125 transitions. [2023-04-02 01:41:08,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 01:41:08,836 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-04-02 01:41:08,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:41:08,838 INFO L225 Difference]: With dead ends: 101 [2023-04-02 01:41:08,838 INFO L226 Difference]: Without dead ends: 64 [2023-04-02 01:41:08,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2023-04-02 01:41:08,839 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 115 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:41:08,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 47 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:41:08,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-04-02 01:41:08,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2023-04-02 01:41:08,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 49 states have (on average 1.163265306122449) internal successors, (57), 50 states have internal predecessors, (57), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:41:08,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2023-04-02 01:41:08,851 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 25 [2023-04-02 01:41:08,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:41:08,851 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2023-04-02 01:41:08,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:41:08,851 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2023-04-02 01:41:08,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 01:41:08,852 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:41:08,852 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:41:08,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 01:41:09,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:41:09,059 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:41:09,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:41:09,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1979179140, now seen corresponding path program 4 times [2023-04-02 01:41:09,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:41:09,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460511572] [2023-04-02 01:41:09,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:41:09,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:41:09,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:09,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:41:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:41:09,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:41:09,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460511572] [2023-04-02 01:41:09,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460511572] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:41:09,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425735750] [2023-04-02 01:41:09,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 01:41:09,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:41:09,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:41:09,377 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) [2023-04-02 01:41:09,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 01:41:09,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 01:41:09,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:41:09,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-02 01:41:09,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:41:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:41:09,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:41:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:41:09,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425735750] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:41:09,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:41:09,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2023-04-02 01:41:09,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144190915] [2023-04-02 01:41:09,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:41:09,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-02 01:41:09,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:41:09,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-02 01:41:09,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2023-04-02 01:41:09,994 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:41:20,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:41:20,914 INFO L93 Difference]: Finished difference Result 147 states and 180 transitions. [2023-04-02 01:41:20,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-02 01:41:20,914 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-04-02 01:41:20,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:41:20,915 INFO L225 Difference]: With dead ends: 147 [2023-04-02 01:41:20,915 INFO L226 Difference]: Without dead ends: 96 [2023-04-02 01:41:20,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=985, Invalid=2555, Unknown=0, NotChecked=0, Total=3540 [2023-04-02 01:41:20,919 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 183 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 01:41:20,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 77 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 01:41:20,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-04-02 01:41:20,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2023-04-02 01:41:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 82 states have internal predecessors, (89), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 01:41:20,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2023-04-02 01:41:20,940 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 41 [2023-04-02 01:41:20,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:41:20,941 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2023-04-02 01:41:20,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 31 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:41:20,941 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2023-04-02 01:41:20,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 01:41:20,943 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:41:20,943 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:41:20,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 01:41:21,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:41:21,152 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:41:21,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:41:21,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1974009244, now seen corresponding path program 5 times [2023-04-02 01:41:21,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:41:21,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116774936] [2023-04-02 01:41:21,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:41:21,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:41:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:22,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:41:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:41:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:41:22,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:41:22,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116774936] [2023-04-02 01:41:22,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116774936] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:41:22,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380381125] [2023-04-02 01:41:22,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 01:41:22,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:41:22,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:41:22,072 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) [2023-04-02 01:41:22,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 01:41:33,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2023-04-02 01:41:33,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:41:33,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 61 conjunts are in the unsatisfiable core [2023-04-02 01:41:33,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:41:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:41:33,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:41:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:41:34,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380381125] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:41:34,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:41:34,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2023-04-02 01:41:34,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255570333] [2023-04-02 01:41:34,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:41:34,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-04-02 01:41:34,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:41:34,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-04-02 01:41:34,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=2947, Unknown=0, NotChecked=0, Total=4032 [2023-04-02 01:41:34,888 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand has 64 states, 64 states have (on average 2.0625) internal successors, (132), 63 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)