/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/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 06:28:17,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 06:28:17,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 06:28:17,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 06:28:17,906 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 06:28:17,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 06:28:17,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 06:28:17,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 06:28:17,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 06:28:17,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 06:28:17,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 06:28:17,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 06:28:17,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 06:28:17,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 06:28:17,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 06:28:17,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 06:28:17,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 06:28:17,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 06:28:17,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 06:28:17,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 06:28:17,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 06:28:17,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 06:28:17,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 06:28:17,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 06:28:17,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 06:28:17,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 06:28:17,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 06:28:17,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 06:28:17,943 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 06:28:17,944 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 06:28:17,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 06:28:17,944 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 06:28:17,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 06:28:17,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 06:28:17,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 06:28:17,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 06:28:17,946 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 06:28:17,967 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 06:28:17,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 06:28:17,968 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 06:28:17,968 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 06:28:17,969 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 06:28:17,969 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 06:28:17,970 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 06:28:17,970 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 06:28:17,970 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 06:28:17,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 06:28:17,970 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 06:28:17,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 06:28:17,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 06:28:17,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 06:28:17,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 06:28:17,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 06:28:17,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 06:28:17,971 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 06:28:17,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 06:28:17,971 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 06:28:17,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 06:28:17,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 06:28:17,971 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 06:28:17,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 06:28:17,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:28:17,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 06:28:17,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 06:28:17,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 06:28:17,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 06:28:17,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 06:28:17,972 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 06:28:17,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 06:28:17,972 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 06:28:17,972 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 06:28:17,973 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 06:28:17,973 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 06:28:18,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 06:28:18,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 06:28:18,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 06:28:18,175 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 06:28:18,175 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 06:28:18,176 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-02 06:28:19,227 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 06:28:19,406 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 06:28:19,406 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-02 06:28:19,413 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcaa67e3a/d733bd5d7bd744dc9a55b06fb13658c0/FLAGc18b742e5 [2023-04-02 06:28:19,422 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bcaa67e3a/d733bd5d7bd744dc9a55b06fb13658c0 [2023-04-02 06:28:19,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 06:28:19,426 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 06:28:19,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 06:28:19,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 06:28:19,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 06:28:19,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:28:19" (1/1) ... [2023-04-02 06:28:19,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4472799d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:28:19, skipping insertion in model container [2023-04-02 06:28:19,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:28:19" (1/1) ... [2023-04-02 06:28:19,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 06:28:19,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 06:28:19,580 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/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6638,6651] [2023-04-02 06:28:19,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:28:19,617 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 06:28:19,645 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/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6638,6651] [2023-04-02 06:28:19,664 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:28:19,676 INFO L208 MainTranslator]: Completed translation [2023-04-02 06:28:19,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:28:19 WrapperNode [2023-04-02 06:28:19,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 06:28:19,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 06:28:19,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 06:28:19,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 06:28:19,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:28:19" (1/1) ... [2023-04-02 06:28:19,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:28:19" (1/1) ... [2023-04-02 06:28:19,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:28:19" (1/1) ... [2023-04-02 06:28:19,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:28:19" (1/1) ... [2023-04-02 06:28:19,701 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:28:19" (1/1) ... [2023-04-02 06:28:19,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:28:19" (1/1) ... [2023-04-02 06:28:19,706 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:28:19" (1/1) ... [2023-04-02 06:28:19,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:28:19" (1/1) ... [2023-04-02 06:28:19,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 06:28:19,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 06:28:19,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 06:28:19,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 06:28:19,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:28:19" (1/1) ... [2023-04-02 06:28:19,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:28:19,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:28:19,766 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 06:28:19,770 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 06:28:19,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 06:28:19,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 06:28:19,815 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 06:28:19,815 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 06:28:19,816 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 06:28:19,816 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 06:28:19,816 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 06:28:19,816 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 06:28:19,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 06:28:19,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 06:28:19,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 06:28:19,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-02 06:28:19,829 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 06:28:19,829 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 06:28:19,829 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 06:28:19,829 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 06:28:19,829 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 06:28:19,829 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 06:28:19,830 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 06:28:19,830 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-02 06:28:19,830 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 06:28:19,830 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 06:28:19,830 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 06:28:19,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 06:28:19,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 06:28:19,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 06:28:19,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 06:28:19,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 06:28:19,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 06:28:20,026 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 06:28:20,027 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 06:28:20,456 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 06:28:20,461 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 06:28:20,461 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 06:28:20,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:28:20 BoogieIcfgContainer [2023-04-02 06:28:20,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 06:28:20,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 06:28:20,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 06:28:20,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 06:28:20,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 06:28:19" (1/3) ... [2023-04-02 06:28:20,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66861e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:28:20, skipping insertion in model container [2023-04-02 06:28:20,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:28:19" (2/3) ... [2023-04-02 06:28:20,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66861e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:28:20, skipping insertion in model container [2023-04-02 06:28:20,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:28:20" (3/3) ... [2023-04-02 06:28:20,468 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2023-04-02 06:28:20,479 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 06:28:20,479 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 06:28:20,522 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 06:28:20,527 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;@701ab4c6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 06:28:20,527 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 06:28:20,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 122 states have (on average 1.7377049180327868) internal successors, (212), 124 states have internal predecessors, (212), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 06:28:20,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-02 06:28:20,537 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:28:20,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:28:20,538 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:28:20,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:28:20,542 INFO L85 PathProgramCache]: Analyzing trace with hash 54842273, now seen corresponding path program 1 times [2023-04-02 06:28:20,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:28:20,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731985415] [2023-04-02 06:28:20,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:28:20,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:28:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:21,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:28:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:21,152 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 06:28:21,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:28:21,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731985415] [2023-04-02 06:28:21,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731985415] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:28:21,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:28:21,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:28:21,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643462318] [2023-04-02 06:28:21,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:28:21,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 06:28:21,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:28:21,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 06:28:21,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:28:21,219 INFO L87 Difference]: Start difference. First operand has 129 states, 122 states have (on average 1.7377049180327868) internal successors, (212), 124 states have internal predecessors, (212), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:22,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:28:22,176 INFO L93 Difference]: Finished difference Result 607 states and 953 transitions. [2023-04-02 06:28:22,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 06:28:22,178 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2023-04-02 06:28:22,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:28:22,187 INFO L225 Difference]: With dead ends: 607 [2023-04-02 06:28:22,187 INFO L226 Difference]: Without dead ends: 514 [2023-04-02 06:28:22,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-04-02 06:28:22,191 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 912 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 06:28:22,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [912 Valid, 1632 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 06:28:22,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2023-04-02 06:28:22,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 188. [2023-04-02 06:28:22,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 184 states have (on average 1.4456521739130435) internal successors, (266), 184 states have internal predecessors, (266), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:22,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 269 transitions. [2023-04-02 06:28:22,261 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 269 transitions. Word has length 65 [2023-04-02 06:28:22,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:28:22,263 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 269 transitions. [2023-04-02 06:28:22,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:22,263 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 269 transitions. [2023-04-02 06:28:22,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-02 06:28:22,266 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:28:22,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:28:22,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 06:28:22,266 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:28:22,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:28:22,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1443445838, now seen corresponding path program 1 times [2023-04-02 06:28:22,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:28:22,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843392087] [2023-04-02 06:28:22,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:28:22,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:28:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:22,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:28:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:22,571 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 06:28:22,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:28:22,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843392087] [2023-04-02 06:28:22,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843392087] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:28:22,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:28:22,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:28:22,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605597002] [2023-04-02 06:28:22,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:28:22,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 06:28:22,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:28:22,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 06:28:22,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:28:22,574 INFO L87 Difference]: Start difference. First operand 188 states and 269 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:23,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:28:23,227 INFO L93 Difference]: Finished difference Result 657 states and 998 transitions. [2023-04-02 06:28:23,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 06:28:23,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2023-04-02 06:28:23,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:28:23,231 INFO L225 Difference]: With dead ends: 657 [2023-04-02 06:28:23,233 INFO L226 Difference]: Without dead ends: 557 [2023-04-02 06:28:23,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-04-02 06:28:23,242 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 512 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:28:23,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 905 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:28:23,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2023-04-02 06:28:23,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 232. [2023-04-02 06:28:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 228 states have (on average 1.469298245614035) internal successors, (335), 228 states have internal predecessors, (335), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:23,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 338 transitions. [2023-04-02 06:28:23,265 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 338 transitions. Word has length 67 [2023-04-02 06:28:23,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:28:23,266 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 338 transitions. [2023-04-02 06:28:23,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:23,266 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 338 transitions. [2023-04-02 06:28:23,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-02 06:28:23,266 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:28:23,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:28:23,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 06:28:23,267 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:28:23,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:28:23,267 INFO L85 PathProgramCache]: Analyzing trace with hash -652385372, now seen corresponding path program 1 times [2023-04-02 06:28:23,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:28:23,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006046922] [2023-04-02 06:28:23,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:28:23,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:28:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:23,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:28:23,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:23,472 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 06:28:23,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:28:23,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006046922] [2023-04-02 06:28:23,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006046922] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:28:23,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:28:23,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:28:23,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410666960] [2023-04-02 06:28:23,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:28:23,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 06:28:23,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:28:23,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 06:28:23,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:28:23,474 INFO L87 Difference]: Start difference. First operand 232 states and 338 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:24,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:28:24,051 INFO L93 Difference]: Finished difference Result 717 states and 1092 transitions. [2023-04-02 06:28:24,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 06:28:24,051 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2023-04-02 06:28:24,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:28:24,053 INFO L225 Difference]: With dead ends: 717 [2023-04-02 06:28:24,053 INFO L226 Difference]: Without dead ends: 617 [2023-04-02 06:28:24,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-04-02 06:28:24,055 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 589 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:28:24,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 802 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:28:24,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2023-04-02 06:28:24,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 352. [2023-04-02 06:28:24,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 348 states have (on average 1.5028735632183907) internal successors, (523), 348 states have internal predecessors, (523), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:24,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 526 transitions. [2023-04-02 06:28:24,082 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 526 transitions. Word has length 67 [2023-04-02 06:28:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:28:24,082 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 526 transitions. [2023-04-02 06:28:24,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 526 transitions. [2023-04-02 06:28:24,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-02 06:28:24,083 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:28:24,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:28:24,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 06:28:24,083 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:28:24,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:28:24,084 INFO L85 PathProgramCache]: Analyzing trace with hash -960494125, now seen corresponding path program 1 times [2023-04-02 06:28:24,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:28:24,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251377666] [2023-04-02 06:28:24,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:28:24,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:28:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:24,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:28:24,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:24,257 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 06:28:24,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:28:24,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251377666] [2023-04-02 06:28:24,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251377666] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:28:24,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:28:24,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:28:24,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575837923] [2023-04-02 06:28:24,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:28:24,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 06:28:24,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:28:24,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 06:28:24,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:28:24,258 INFO L87 Difference]: Start difference. First operand 352 states and 526 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:24,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:28:24,726 INFO L93 Difference]: Finished difference Result 767 states and 1170 transitions. [2023-04-02 06:28:24,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 06:28:24,726 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2023-04-02 06:28:24,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:28:24,729 INFO L225 Difference]: With dead ends: 767 [2023-04-02 06:28:24,729 INFO L226 Difference]: Without dead ends: 667 [2023-04-02 06:28:24,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-04-02 06:28:24,730 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 670 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:28:24,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 790 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:28:24,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2023-04-02 06:28:24,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 402. [2023-04-02 06:28:24,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 398 states have (on average 1.5100502512562815) internal successors, (601), 398 states have internal predecessors, (601), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 604 transitions. [2023-04-02 06:28:24,759 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 604 transitions. Word has length 67 [2023-04-02 06:28:24,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:28:24,759 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 604 transitions. [2023-04-02 06:28:24,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:24,759 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 604 transitions. [2023-04-02 06:28:24,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-02 06:28:24,760 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:28:24,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:28:24,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 06:28:24,760 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:28:24,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:28:24,760 INFO L85 PathProgramCache]: Analyzing trace with hash 13558267, now seen corresponding path program 1 times [2023-04-02 06:28:24,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:28:24,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521566997] [2023-04-02 06:28:24,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:28:24,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:28:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:24,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:28:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:24,901 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 06:28:24,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:28:24,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521566997] [2023-04-02 06:28:24,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521566997] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:28:24,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:28:24,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:28:24,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638968736] [2023-04-02 06:28:24,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:28:24,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:28:24,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:28:24,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:28:24,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:28:24,907 INFO L87 Difference]: Start difference. First operand 402 states and 604 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:25,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:28:25,161 INFO L93 Difference]: Finished difference Result 703 states and 1073 transitions. [2023-04-02 06:28:25,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:28:25,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2023-04-02 06:28:25,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:28:25,162 INFO L225 Difference]: With dead ends: 703 [2023-04-02 06:28:25,162 INFO L226 Difference]: Without dead ends: 401 [2023-04-02 06:28:25,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:28:25,164 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 0 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:28:25,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 322 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:28:25,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-04-02 06:28:25,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2023-04-02 06:28:25,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 397 states have (on average 1.4962216624685138) internal successors, (594), 397 states have internal predecessors, (594), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:25,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 597 transitions. [2023-04-02 06:28:25,189 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 597 transitions. Word has length 67 [2023-04-02 06:28:25,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:28:25,189 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 597 transitions. [2023-04-02 06:28:25,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:25,189 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 597 transitions. [2023-04-02 06:28:25,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-02 06:28:25,190 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:28:25,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:28:25,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 06:28:25,190 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:28:25,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:28:25,191 INFO L85 PathProgramCache]: Analyzing trace with hash 185184218, now seen corresponding path program 1 times [2023-04-02 06:28:25,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:28:25,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189563203] [2023-04-02 06:28:25,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:28:25,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:28:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:25,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:28:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:25,485 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 06:28:25,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:28:25,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189563203] [2023-04-02 06:28:25,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189563203] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:28:25,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:28:25,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:28:25,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601594000] [2023-04-02 06:28:25,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:28:25,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 06:28:25,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:28:25,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 06:28:25,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:28:25,487 INFO L87 Difference]: Start difference. First operand 401 states and 597 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:25,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:28:25,988 INFO L93 Difference]: Finished difference Result 842 states and 1280 transitions. [2023-04-02 06:28:25,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 06:28:25,988 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2023-04-02 06:28:25,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:28:25,991 INFO L225 Difference]: With dead ends: 842 [2023-04-02 06:28:25,991 INFO L226 Difference]: Without dead ends: 547 [2023-04-02 06:28:25,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-04-02 06:28:25,993 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 108 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:28:25,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 623 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:28:25,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2023-04-02 06:28:26,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 545. [2023-04-02 06:28:26,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 541 states have (on average 1.5046210720887245) internal successors, (814), 541 states have internal predecessors, (814), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:26,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 817 transitions. [2023-04-02 06:28:26,041 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 817 transitions. Word has length 67 [2023-04-02 06:28:26,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:28:26,041 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 817 transitions. [2023-04-02 06:28:26,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:26,042 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 817 transitions. [2023-04-02 06:28:26,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-02 06:28:26,042 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:28:26,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:28:26,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 06:28:26,042 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:28:26,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:28:26,043 INFO L85 PathProgramCache]: Analyzing trace with hash 2054461865, now seen corresponding path program 1 times [2023-04-02 06:28:26,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:28:26,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037605420] [2023-04-02 06:28:26,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:28:26,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:28:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:26,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:28:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:26,248 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 06:28:26,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:28:26,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037605420] [2023-04-02 06:28:26,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037605420] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:28:26,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:28:26,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:28:26,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57716877] [2023-04-02 06:28:26,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:28:26,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 06:28:26,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:28:26,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 06:28:26,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:28:26,250 INFO L87 Difference]: Start difference. First operand 545 states and 817 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:26,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:28:26,792 INFO L93 Difference]: Finished difference Result 961 states and 1453 transitions. [2023-04-02 06:28:26,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 06:28:26,792 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2023-04-02 06:28:26,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:28:26,795 INFO L225 Difference]: With dead ends: 961 [2023-04-02 06:28:26,795 INFO L226 Difference]: Without dead ends: 862 [2023-04-02 06:28:26,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-04-02 06:28:26,798 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 634 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:28:26,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 942 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:28:26,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2023-04-02 06:28:26,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 653. [2023-04-02 06:28:26,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 649 states have (on average 1.5115562403697997) internal successors, (981), 649 states have internal predecessors, (981), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:26,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 984 transitions. [2023-04-02 06:28:26,846 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 984 transitions. Word has length 67 [2023-04-02 06:28:26,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:28:26,847 INFO L495 AbstractCegarLoop]: Abstraction has 653 states and 984 transitions. [2023-04-02 06:28:26,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:26,847 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 984 transitions. [2023-04-02 06:28:26,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 06:28:26,851 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:28:26,851 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:28:26,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 06:28:26,852 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:28:26,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:28:26,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1443834137, now seen corresponding path program 1 times [2023-04-02 06:28:26,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:28:26,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745191661] [2023-04-02 06:28:26,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:28:26,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:28:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:27,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:28:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:27,049 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 06:28:27,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:28:27,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745191661] [2023-04-02 06:28:27,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745191661] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:28:27,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:28:27,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:28:27,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742654293] [2023-04-02 06:28:27,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:28:27,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:28:27,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:28:27,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:28:27,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:28:27,051 INFO L87 Difference]: Start difference. First operand 653 states and 984 transitions. Second operand has 6 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:27,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:28:27,417 INFO L93 Difference]: Finished difference Result 1269 states and 1929 transitions. [2023-04-02 06:28:27,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:28:27,417 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-04-02 06:28:27,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:28:27,419 INFO L225 Difference]: With dead ends: 1269 [2023-04-02 06:28:27,420 INFO L226 Difference]: Without dead ends: 653 [2023-04-02 06:28:27,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:28:27,421 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 434 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:28:27,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 101 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:28:27,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2023-04-02 06:28:27,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 653. [2023-04-02 06:28:27,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 649 states have (on average 1.4930662557781202) internal successors, (969), 649 states have internal predecessors, (969), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 972 transitions. [2023-04-02 06:28:27,472 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 972 transitions. Word has length 68 [2023-04-02 06:28:27,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:28:27,472 INFO L495 AbstractCegarLoop]: Abstraction has 653 states and 972 transitions. [2023-04-02 06:28:27,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:27,472 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 972 transitions. [2023-04-02 06:28:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-02 06:28:27,473 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:28:27,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:28:27,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 06:28:27,473 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:28:27,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:28:27,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1785250298, now seen corresponding path program 1 times [2023-04-02 06:28:27,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:28:27,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590919200] [2023-04-02 06:28:27,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:28:27,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:28:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:27,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:28:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:27,615 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 06:28:27,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:28:27,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590919200] [2023-04-02 06:28:27,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590919200] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:28:27,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:28:27,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:28:27,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71940183] [2023-04-02 06:28:27,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:28:27,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:28:27,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:28:27,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:28:27,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:28:27,617 INFO L87 Difference]: Start difference. First operand 653 states and 972 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:27,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:28:27,964 INFO L93 Difference]: Finished difference Result 1265 states and 1901 transitions. [2023-04-02 06:28:27,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:28:27,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2023-04-02 06:28:27,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:28:27,966 INFO L225 Difference]: With dead ends: 1265 [2023-04-02 06:28:27,966 INFO L226 Difference]: Without dead ends: 653 [2023-04-02 06:28:27,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:28:27,967 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 416 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:28:27,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 109 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:28:27,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2023-04-02 06:28:28,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 653. [2023-04-02 06:28:28,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 649 states have (on average 1.4745762711864407) internal successors, (957), 649 states have internal predecessors, (957), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:28,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 960 transitions. [2023-04-02 06:28:28,022 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 960 transitions. Word has length 69 [2023-04-02 06:28:28,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:28:28,022 INFO L495 AbstractCegarLoop]: Abstraction has 653 states and 960 transitions. [2023-04-02 06:28:28,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:28,022 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 960 transitions. [2023-04-02 06:28:28,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 06:28:28,023 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:28:28,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:28:28,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 06:28:28,023 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:28:28,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:28:28,023 INFO L85 PathProgramCache]: Analyzing trace with hash -2005647574, now seen corresponding path program 1 times [2023-04-02 06:28:28,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:28:28,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127770040] [2023-04-02 06:28:28,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:28:28,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:28:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:28,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:28:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:28,182 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 06:28:28,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:28:28,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127770040] [2023-04-02 06:28:28,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127770040] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:28:28,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:28:28,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:28:28,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908195440] [2023-04-02 06:28:28,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:28:28,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:28:28,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:28:28,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:28:28,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:28:28,184 INFO L87 Difference]: Start difference. First operand 653 states and 960 transitions. Second operand has 6 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:28,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:28:28,523 INFO L93 Difference]: Finished difference Result 1261 states and 1873 transitions. [2023-04-02 06:28:28,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:28:28,524 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2023-04-02 06:28:28,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:28:28,526 INFO L225 Difference]: With dead ends: 1261 [2023-04-02 06:28:28,526 INFO L226 Difference]: Without dead ends: 653 [2023-04-02 06:28:28,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:28:28,527 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 398 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:28:28,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 117 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:28:28,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2023-04-02 06:28:28,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 653. [2023-04-02 06:28:28,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 649 states have (on average 1.4560862865947612) internal successors, (945), 649 states have internal predecessors, (945), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:28,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 948 transitions. [2023-04-02 06:28:28,602 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 948 transitions. Word has length 70 [2023-04-02 06:28:28,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:28:28,602 INFO L495 AbstractCegarLoop]: Abstraction has 653 states and 948 transitions. [2023-04-02 06:28:28,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:28,602 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 948 transitions. [2023-04-02 06:28:28,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-02 06:28:28,603 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:28:28,603 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:28:28,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 06:28:28,603 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:28:28,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:28:28,603 INFO L85 PathProgramCache]: Analyzing trace with hash -2042573783, now seen corresponding path program 1 times [2023-04-02 06:28:28,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:28:28,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690079555] [2023-04-02 06:28:28,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:28:28,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:28:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:28,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:28:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:28,759 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 06:28:28,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:28:28,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690079555] [2023-04-02 06:28:28,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690079555] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:28:28,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:28:28,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:28:28,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547869299] [2023-04-02 06:28:28,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:28:28,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:28:28,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:28:28,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:28:28,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:28:28,761 INFO L87 Difference]: Start difference. First operand 653 states and 948 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:29,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:28:29,244 INFO L93 Difference]: Finished difference Result 1849 states and 2717 transitions. [2023-04-02 06:28:29,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:28:29,245 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2023-04-02 06:28:29,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:28:29,248 INFO L225 Difference]: With dead ends: 1849 [2023-04-02 06:28:29,248 INFO L226 Difference]: Without dead ends: 1229 [2023-04-02 06:28:29,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:28:29,249 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 625 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:28:29,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 146 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:28:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2023-04-02 06:28:29,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1227. [2023-04-02 06:28:29,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1223 states have (on average 1.4611610793131644) internal successors, (1787), 1223 states have internal predecessors, (1787), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1790 transitions. [2023-04-02 06:28:29,358 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1790 transitions. Word has length 71 [2023-04-02 06:28:29,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:28:29,358 INFO L495 AbstractCegarLoop]: Abstraction has 1227 states and 1790 transitions. [2023-04-02 06:28:29,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1790 transitions. [2023-04-02 06:28:29,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-02 06:28:29,359 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:28:29,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:28:29,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 06:28:29,359 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:28:29,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:28:29,360 INFO L85 PathProgramCache]: Analyzing trace with hash 459823607, now seen corresponding path program 1 times [2023-04-02 06:28:29,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:28:29,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859226818] [2023-04-02 06:28:29,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:28:29,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:28:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:29,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:28:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:29,562 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 06:28:29,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:28:29,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859226818] [2023-04-02 06:28:29,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859226818] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:28:29,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:28:29,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:28:29,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098728850] [2023-04-02 06:28:29,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:28:29,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:28:29,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:28:29,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:28:29,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:28:29,563 INFO L87 Difference]: Start difference. First operand 1227 states and 1790 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:29,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:28:29,964 INFO L93 Difference]: Finished difference Result 1511 states and 2175 transitions. [2023-04-02 06:28:29,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:28:29,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2023-04-02 06:28:29,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:28:29,968 INFO L225 Difference]: With dead ends: 1511 [2023-04-02 06:28:29,968 INFO L226 Difference]: Without dead ends: 1509 [2023-04-02 06:28:29,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:28:29,969 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 138 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:28:29,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 630 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:28:29,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2023-04-02 06:28:30,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1227. [2023-04-02 06:28:30,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1223 states have (on average 1.4513491414554374) internal successors, (1775), 1223 states have internal predecessors, (1775), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:30,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1778 transitions. [2023-04-02 06:28:30,108 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1778 transitions. Word has length 72 [2023-04-02 06:28:30,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:28:30,108 INFO L495 AbstractCegarLoop]: Abstraction has 1227 states and 1778 transitions. [2023-04-02 06:28:30,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:30,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1778 transitions. [2023-04-02 06:28:30,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 06:28:30,109 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:28:30,109 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:28:30,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 06:28:30,109 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:28:30,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:28:30,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1916223475, now seen corresponding path program 1 times [2023-04-02 06:28:30,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:28:30,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696938849] [2023-04-02 06:28:30,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:28:30,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:28:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:30,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:28:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:30,583 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 06:28:30,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:28:30,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696938849] [2023-04-02 06:28:30,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696938849] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:28:30,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:28:30,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-04-02 06:28:30,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506025157] [2023-04-02 06:28:30,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:28:30,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 06:28:30,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:28:30,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 06:28:30,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-04-02 06:28:30,584 INFO L87 Difference]: Start difference. First operand 1227 states and 1778 transitions. Second operand has 15 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:32,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:28:32,066 INFO L93 Difference]: Finished difference Result 5829 states and 8392 transitions. [2023-04-02 06:28:32,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-02 06:28:32,067 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-02 06:28:32,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:28:32,079 INFO L225 Difference]: With dead ends: 5829 [2023-04-02 06:28:32,079 INFO L226 Difference]: Without dead ends: 4753 [2023-04-02 06:28:32,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 06:28:32,084 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 1677 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1677 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:28:32,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1677 Valid, 489 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:28:32,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4753 states. [2023-04-02 06:28:32,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4753 to 1260. [2023-04-02 06:28:32,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1256 states have (on average 1.446656050955414) internal successors, (1817), 1256 states have internal predecessors, (1817), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 1820 transitions. [2023-04-02 06:28:32,364 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 1820 transitions. Word has length 73 [2023-04-02 06:28:32,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:28:32,364 INFO L495 AbstractCegarLoop]: Abstraction has 1260 states and 1820 transitions. [2023-04-02 06:28:32,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:32,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 1820 transitions. [2023-04-02 06:28:32,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 06:28:32,365 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:28:32,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:28:32,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 06:28:32,365 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:28:32,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:28:32,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1608114722, now seen corresponding path program 1 times [2023-04-02 06:28:32,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:28:32,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373228320] [2023-04-02 06:28:32,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:28:32,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:28:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:32,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:28:32,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:32,696 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 06:28:32,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:28:32,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373228320] [2023-04-02 06:28:32,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373228320] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:28:32,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:28:32,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-02 06:28:32,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210295521] [2023-04-02 06:28:32,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:28:32,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 06:28:32,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:28:32,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 06:28:32,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-04-02 06:28:32,697 INFO L87 Difference]: Start difference. First operand 1260 states and 1820 transitions. Second operand has 11 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:33,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:28:33,727 INFO L93 Difference]: Finished difference Result 2971 states and 4299 transitions. [2023-04-02 06:28:33,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 06:28:33,728 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-02 06:28:33,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:28:33,732 INFO L225 Difference]: With dead ends: 2971 [2023-04-02 06:28:33,732 INFO L226 Difference]: Without dead ends: 1847 [2023-04-02 06:28:33,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2023-04-02 06:28:33,735 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 1347 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1347 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:28:33,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1347 Valid, 294 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:28:33,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2023-04-02 06:28:33,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1227. [2023-04-02 06:28:33,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1223 states have (on average 1.4488961569910057) internal successors, (1772), 1223 states have internal predecessors, (1772), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:33,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1775 transitions. [2023-04-02 06:28:33,961 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1775 transitions. Word has length 73 [2023-04-02 06:28:33,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:28:33,961 INFO L495 AbstractCegarLoop]: Abstraction has 1227 states and 1775 transitions. [2023-04-02 06:28:33,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:33,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1775 transitions. [2023-04-02 06:28:33,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 06:28:33,962 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:28:33,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:28:33,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-02 06:28:33,962 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:28:33,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:28:33,962 INFO L85 PathProgramCache]: Analyzing trace with hash 328103416, now seen corresponding path program 1 times [2023-04-02 06:28:33,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:28:33,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362872207] [2023-04-02 06:28:33,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:28:33,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:28:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:34,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:28:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:34,261 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 06:28:34,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:28:34,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362872207] [2023-04-02 06:28:34,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362872207] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:28:34,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:28:34,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-02 06:28:34,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688342135] [2023-04-02 06:28:34,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:28:34,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 06:28:34,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:28:34,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 06:28:34,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-04-02 06:28:34,263 INFO L87 Difference]: Start difference. First operand 1227 states and 1775 transitions. Second operand has 11 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:35,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:28:35,387 INFO L93 Difference]: Finished difference Result 3459 states and 5013 transitions. [2023-04-02 06:28:35,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 06:28:35,393 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-02 06:28:35,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:28:35,411 INFO L225 Difference]: With dead ends: 3459 [2023-04-02 06:28:35,411 INFO L226 Difference]: Without dead ends: 2380 [2023-04-02 06:28:35,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2023-04-02 06:28:35,413 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 987 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:28:35,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [987 Valid, 304 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:28:35,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2023-04-02 06:28:35,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 1227. [2023-04-02 06:28:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1223 states have (on average 1.4415372035977105) internal successors, (1763), 1223 states have internal predecessors, (1763), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:35,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1766 transitions. [2023-04-02 06:28:35,642 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1766 transitions. Word has length 73 [2023-04-02 06:28:35,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:28:35,642 INFO L495 AbstractCegarLoop]: Abstraction has 1227 states and 1766 transitions. [2023-04-02 06:28:35,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:35,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1766 transitions. [2023-04-02 06:28:35,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 06:28:35,643 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:28:35,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:28:35,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-02 06:28:35,643 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:28:35,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:28:35,644 INFO L85 PathProgramCache]: Analyzing trace with hash 383997117, now seen corresponding path program 1 times [2023-04-02 06:28:35,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:28:35,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680149852] [2023-04-02 06:28:35,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:28:35,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:28:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:36,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:28:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:36,060 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 06:28:36,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:28:36,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680149852] [2023-04-02 06:28:36,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680149852] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:28:36,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:28:36,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-02 06:28:36,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505390195] [2023-04-02 06:28:36,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:28:36,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 06:28:36,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:28:36,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 06:28:36,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-04-02 06:28:36,063 INFO L87 Difference]: Start difference. First operand 1227 states and 1766 transitions. Second operand has 14 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:37,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:28:37,349 INFO L93 Difference]: Finished difference Result 3504 states and 5064 transitions. [2023-04-02 06:28:37,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-02 06:28:37,350 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-02 06:28:37,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:28:37,356 INFO L225 Difference]: With dead ends: 3504 [2023-04-02 06:28:37,356 INFO L226 Difference]: Without dead ends: 2395 [2023-04-02 06:28:37,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2023-04-02 06:28:37,358 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 738 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:28:37,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 527 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:28:37,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2023-04-02 06:28:37,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 1227. [2023-04-02 06:28:37,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1223 states have (on average 1.436631234668847) internal successors, (1757), 1223 states have internal predecessors, (1757), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1760 transitions. [2023-04-02 06:28:37,640 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1760 transitions. Word has length 73 [2023-04-02 06:28:37,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:28:37,641 INFO L495 AbstractCegarLoop]: Abstraction has 1227 states and 1760 transitions. [2023-04-02 06:28:37,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.384615384615385) internal successors, (70), 12 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:37,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1760 transitions. [2023-04-02 06:28:37,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-02 06:28:37,641 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:28:37,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:28:37,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-02 06:28:37,642 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:28:37,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:28:37,642 INFO L85 PathProgramCache]: Analyzing trace with hash -526037728, now seen corresponding path program 1 times [2023-04-02 06:28:37,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:28:37,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659287337] [2023-04-02 06:28:37,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:28:37,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:28:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:37,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:28:37,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:37,917 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 06:28:37,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:28:37,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659287337] [2023-04-02 06:28:37,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659287337] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:28:37,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:28:37,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-04-02 06:28:37,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302998234] [2023-04-02 06:28:37,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:28:37,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 06:28:37,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:28:37,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 06:28:37,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-02 06:28:37,918 INFO L87 Difference]: Start difference. First operand 1227 states and 1760 transitions. Second operand has 10 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:28:39,068 INFO L93 Difference]: Finished difference Result 3416 states and 4951 transitions. [2023-04-02 06:28:39,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 06:28:39,069 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2023-04-02 06:28:39,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:28:39,074 INFO L225 Difference]: With dead ends: 3416 [2023-04-02 06:28:39,074 INFO L226 Difference]: Without dead ends: 2306 [2023-04-02 06:28:39,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2023-04-02 06:28:39,076 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 1114 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:28:39,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1114 Valid, 271 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:28:39,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2023-04-02 06:28:39,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 1227. [2023-04-02 06:28:39,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1223 states have (on average 1.4358135731807031) internal successors, (1756), 1223 states have internal predecessors, (1756), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:39,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1759 transitions. [2023-04-02 06:28:39,373 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1759 transitions. Word has length 74 [2023-04-02 06:28:39,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:28:39,373 INFO L495 AbstractCegarLoop]: Abstraction has 1227 states and 1759 transitions. [2023-04-02 06:28:39,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:39,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1759 transitions. [2023-04-02 06:28:39,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-02 06:28:39,374 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:28:39,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:28:39,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-02 06:28:39,374 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:28:39,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:28:39,374 INFO L85 PathProgramCache]: Analyzing trace with hash -115350866, now seen corresponding path program 1 times [2023-04-02 06:28:39,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:28:39,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213934743] [2023-04-02 06:28:39,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:28:39,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:28:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:39,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:28:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:39,931 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 06:28:39,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:28:39,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213934743] [2023-04-02 06:28:39,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213934743] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:28:39,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:28:39,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-04-02 06:28:39,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593851927] [2023-04-02 06:28:39,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:28:39,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 06:28:39,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:28:39,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 06:28:39,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2023-04-02 06:28:39,933 INFO L87 Difference]: Start difference. First operand 1227 states and 1759 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:42,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:28:42,655 INFO L93 Difference]: Finished difference Result 4930 states and 7157 transitions. [2023-04-02 06:28:42,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 06:28:42,656 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2023-04-02 06:28:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:28:42,667 INFO L225 Difference]: With dead ends: 4930 [2023-04-02 06:28:42,667 INFO L226 Difference]: Without dead ends: 4516 [2023-04-02 06:28:42,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2023-04-02 06:28:42,670 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 1185 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:28:42,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1185 Valid, 1292 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:28:42,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4516 states. [2023-04-02 06:28:43,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4516 to 1210. [2023-04-02 06:28:43,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1206 states have (on average 1.4320066334991708) internal successors, (1727), 1206 states have internal predecessors, (1727), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:43,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1730 transitions. [2023-04-02 06:28:43,093 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1730 transitions. Word has length 75 [2023-04-02 06:28:43,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:28:43,093 INFO L495 AbstractCegarLoop]: Abstraction has 1210 states and 1730 transitions. [2023-04-02 06:28:43,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:43,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1730 transitions. [2023-04-02 06:28:43,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-02 06:28:43,093 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:28:43,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:28:43,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-02 06:28:43,094 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:28:43,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:28:43,094 INFO L85 PathProgramCache]: Analyzing trace with hash -102741331, now seen corresponding path program 1 times [2023-04-02 06:28:43,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:28:43,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812833499] [2023-04-02 06:28:43,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:28:43,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:28:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:44,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:28:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:44,360 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 06:28:44,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:28:44,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812833499] [2023-04-02 06:28:44,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812833499] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:28:44,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:28:44,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-04-02 06:28:44,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978530317] [2023-04-02 06:28:44,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:28:44,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-02 06:28:44,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:28:44,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-02 06:28:44,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2023-04-02 06:28:44,362 INFO L87 Difference]: Start difference. First operand 1210 states and 1730 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:51,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:28:51,561 INFO L93 Difference]: Finished difference Result 4389 states and 6355 transitions. [2023-04-02 06:28:51,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-04-02 06:28:51,562 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2023-04-02 06:28:51,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:28:51,570 INFO L225 Difference]: With dead ends: 4389 [2023-04-02 06:28:51,570 INFO L226 Difference]: Without dead ends: 3987 [2023-04-02 06:28:51,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=596, Invalid=2596, Unknown=0, NotChecked=0, Total=3192 [2023-04-02 06:28:51,572 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 2130 mSDsluCounter, 4357 mSDsCounter, 0 mSdLazyCounter, 3616 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2130 SdHoareTripleChecker+Valid, 4729 SdHoareTripleChecker+Invalid, 3643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 3616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-02 06:28:51,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2130 Valid, 4729 Invalid, 3643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 3616 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-02 06:28:51,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3987 states. [2023-04-02 06:28:52,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3987 to 1210. [2023-04-02 06:28:52,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1206 states have (on average 1.4303482587064678) internal successors, (1725), 1206 states have internal predecessors, (1725), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:52,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1728 transitions. [2023-04-02 06:28:52,116 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1728 transitions. Word has length 75 [2023-04-02 06:28:52,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:28:52,116 INFO L495 AbstractCegarLoop]: Abstraction has 1210 states and 1728 transitions. [2023-04-02 06:28:52,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:52,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1728 transitions. [2023-04-02 06:28:52,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-02 06:28:52,116 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:28:52,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:28:52,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-02 06:28:52,117 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:28:52,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:28:52,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1040902956, now seen corresponding path program 1 times [2023-04-02 06:28:52,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:28:52,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232546513] [2023-04-02 06:28:52,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:28:52,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:28:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:52,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:28:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:52,521 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 06:28:52,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:28:52,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232546513] [2023-04-02 06:28:52,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232546513] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:28:52,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:28:52,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-04-02 06:28:52,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74079599] [2023-04-02 06:28:52,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:28:52,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 06:28:52,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:28:52,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 06:28:52,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-04-02 06:28:52,523 INFO L87 Difference]: Start difference. First operand 1210 states and 1728 transitions. Second operand has 12 states, 12 states have (on average 6.0) internal successors, (72), 11 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:55,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:28:55,975 INFO L93 Difference]: Finished difference Result 4815 states and 6996 transitions. [2023-04-02 06:28:55,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 06:28:55,975 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 11 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2023-04-02 06:28:55,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:28:55,988 INFO L225 Difference]: With dead ends: 4815 [2023-04-02 06:28:55,988 INFO L226 Difference]: Without dead ends: 4398 [2023-04-02 06:28:55,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2023-04-02 06:28:55,992 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 911 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:28:55,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [911 Valid, 1043 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:28:55,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4398 states. [2023-04-02 06:28:56,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4398 to 1184. [2023-04-02 06:28:56,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1180 states have (on average 1.4330508474576271) internal successors, (1691), 1180 states have internal predecessors, (1691), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:56,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1694 transitions. [2023-04-02 06:28:56,689 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1694 transitions. Word has length 75 [2023-04-02 06:28:56,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:28:56,689 INFO L495 AbstractCegarLoop]: Abstraction has 1184 states and 1694 transitions. [2023-04-02 06:28:56,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 11 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:28:56,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1694 transitions. [2023-04-02 06:28:56,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-02 06:28:56,692 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:28:56,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:28:56,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-02 06:28:56,692 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:28:56,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:28:56,692 INFO L85 PathProgramCache]: Analyzing trace with hash -996619670, now seen corresponding path program 1 times [2023-04-02 06:28:56,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:28:56,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536118774] [2023-04-02 06:28:56,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:28:56,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:28:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:57,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:28:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:28:57,819 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 06:28:57,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:28:57,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536118774] [2023-04-02 06:28:57,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536118774] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:28:57,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:28:57,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2023-04-02 06:28:57,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067694519] [2023-04-02 06:28:57,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:28:57,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-02 06:28:57,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:28:57,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-02 06:28:57,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2023-04-02 06:28:57,821 INFO L87 Difference]: Start difference. First operand 1184 states and 1694 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:03,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:03,662 INFO L93 Difference]: Finished difference Result 4826 states and 7009 transitions. [2023-04-02 06:29:03,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-02 06:29:03,663 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2023-04-02 06:29:03,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:03,670 INFO L225 Difference]: With dead ends: 4826 [2023-04-02 06:29:03,670 INFO L226 Difference]: Without dead ends: 4435 [2023-04-02 06:29:03,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=427, Invalid=2329, Unknown=0, NotChecked=0, Total=2756 [2023-04-02 06:29:03,672 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 845 mSDsluCounter, 3658 mSDsCounter, 0 mSdLazyCounter, 2873 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 3886 SdHoareTripleChecker+Invalid, 2907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:03,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 3886 Invalid, 2907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2873 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 06:29:03,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4435 states. [2023-04-02 06:29:04,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4435 to 1193. [2023-04-02 06:29:04,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1189 states have (on average 1.4314550042052145) internal successors, (1702), 1189 states have internal predecessors, (1702), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:04,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 1705 transitions. [2023-04-02 06:29:04,393 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 1705 transitions. Word has length 76 [2023-04-02 06:29:04,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:04,393 INFO L495 AbstractCegarLoop]: Abstraction has 1193 states and 1705 transitions. [2023-04-02 06:29:04,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:04,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 1705 transitions. [2023-04-02 06:29:04,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-02 06:29:04,394 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:04,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:29:04,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-02 06:29:04,394 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:04,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:04,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1669022832, now seen corresponding path program 1 times [2023-04-02 06:29:04,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:04,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433041061] [2023-04-02 06:29:04,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:04,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:05,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:05,141 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 06:29:05,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:05,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433041061] [2023-04-02 06:29:05,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433041061] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:05,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:05,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-02 06:29:05,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536587908] [2023-04-02 06:29:05,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:05,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 06:29:05,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:05,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 06:29:05,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2023-04-02 06:29:05,143 INFO L87 Difference]: Start difference. First operand 1193 states and 1705 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:10,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:10,974 INFO L93 Difference]: Finished difference Result 5585 states and 8124 transitions. [2023-04-02 06:29:10,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 06:29:10,974 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2023-04-02 06:29:10,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:10,996 INFO L225 Difference]: With dead ends: 5585 [2023-04-02 06:29:10,996 INFO L226 Difference]: Without dead ends: 5183 [2023-04-02 06:29:10,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 06:29:10,998 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 1034 mSDsluCounter, 3226 mSDsCounter, 0 mSdLazyCounter, 1739 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 3575 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:10,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1034 Valid, 3575 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1739 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-02 06:29:11,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5183 states. [2023-04-02 06:29:11,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5183 to 1181. [2023-04-02 06:29:11,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1177 states have (on average 1.433305012744265) internal successors, (1687), 1177 states have internal predecessors, (1687), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:11,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1690 transitions. [2023-04-02 06:29:11,774 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1690 transitions. Word has length 76 [2023-04-02 06:29:11,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:11,774 INFO L495 AbstractCegarLoop]: Abstraction has 1181 states and 1690 transitions. [2023-04-02 06:29:11,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 17 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:11,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1690 transitions. [2023-04-02 06:29:11,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-04-02 06:29:11,775 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:11,775 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:29:11,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-02 06:29:11,775 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:11,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:11,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1355564012, now seen corresponding path program 1 times [2023-04-02 06:29:11,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:11,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392802887] [2023-04-02 06:29:11,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:11,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:12,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:12,180 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 06:29:12,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:12,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392802887] [2023-04-02 06:29:12,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392802887] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:12,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:12,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-04-02 06:29:12,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361105925] [2023-04-02 06:29:12,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:12,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 06:29:12,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:12,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 06:29:12,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-04-02 06:29:12,182 INFO L87 Difference]: Start difference. First operand 1181 states and 1690 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:14,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:14,585 INFO L93 Difference]: Finished difference Result 2661 states and 3850 transitions. [2023-04-02 06:29:14,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 06:29:14,586 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2023-04-02 06:29:14,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:14,588 INFO L225 Difference]: With dead ends: 2661 [2023-04-02 06:29:14,589 INFO L226 Difference]: Without dead ends: 2259 [2023-04-02 06:29:14,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2023-04-02 06:29:14,590 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 614 mSDsluCounter, 1212 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:14,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 1414 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:29:14,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2023-04-02 06:29:15,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 1169. [2023-04-02 06:29:15,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1165 states have (on average 1.4343347639484978) internal successors, (1671), 1165 states have internal predecessors, (1671), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:15,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1674 transitions. [2023-04-02 06:29:15,353 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1674 transitions. Word has length 76 [2023-04-02 06:29:15,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:15,354 INFO L495 AbstractCegarLoop]: Abstraction has 1169 states and 1674 transitions. [2023-04-02 06:29:15,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 13 states have internal predecessors, (73), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:15,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1674 transitions. [2023-04-02 06:29:15,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-02 06:29:15,354 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:15,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:29:15,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-02 06:29:15,355 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:15,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:15,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1172782363, now seen corresponding path program 1 times [2023-04-02 06:29:15,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:15,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060770156] [2023-04-02 06:29:15,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:15,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:16,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:16,069 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 06:29:16,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:16,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060770156] [2023-04-02 06:29:16,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060770156] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:16,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:16,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2023-04-02 06:29:16,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465612295] [2023-04-02 06:29:16,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:16,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-02 06:29:16,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:16,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-02 06:29:16,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2023-04-02 06:29:16,071 INFO L87 Difference]: Start difference. First operand 1169 states and 1674 transitions. Second operand has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 18 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:26,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:26,170 INFO L93 Difference]: Finished difference Result 10626 states and 15498 transitions. [2023-04-02 06:29:26,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-02 06:29:26,187 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 18 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2023-04-02 06:29:26,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:26,217 INFO L225 Difference]: With dead ends: 10626 [2023-04-02 06:29:26,218 INFO L226 Difference]: Without dead ends: 10235 [2023-04-02 06:29:26,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=384, Invalid=1422, Unknown=0, NotChecked=0, Total=1806 [2023-04-02 06:29:26,221 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 2355 mSDsluCounter, 2495 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2355 SdHoareTripleChecker+Valid, 2801 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:26,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2355 Valid, 2801 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1411 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 06:29:26,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10235 states. [2023-04-02 06:29:27,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10235 to 1159. [2023-04-02 06:29:27,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1155 states have (on average 1.4354978354978356) internal successors, (1658), 1155 states have internal predecessors, (1658), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:27,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1661 transitions. [2023-04-02 06:29:27,299 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1661 transitions. Word has length 77 [2023-04-02 06:29:27,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:27,299 INFO L495 AbstractCegarLoop]: Abstraction has 1159 states and 1661 transitions. [2023-04-02 06:29:27,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 18 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:27,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1661 transitions. [2023-04-02 06:29:27,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-02 06:29:27,300 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:27,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:29:27,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-04-02 06:29:27,300 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:27,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:27,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1179417117, now seen corresponding path program 1 times [2023-04-02 06:29:27,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:27,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444537755] [2023-04-02 06:29:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:27,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:28,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:28,040 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 06:29:28,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:28,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444537755] [2023-04-02 06:29:28,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444537755] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:28,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:28,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-04-02 06:29:28,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850090969] [2023-04-02 06:29:28,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:28,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 06:29:28,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:28,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 06:29:28,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2023-04-02 06:29:28,041 INFO L87 Difference]: Start difference. First operand 1159 states and 1661 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 17 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:38,091 INFO L93 Difference]: Finished difference Result 9055 states and 13199 transitions. [2023-04-02 06:29:38,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-02 06:29:38,092 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 17 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2023-04-02 06:29:38,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:38,113 INFO L225 Difference]: With dead ends: 9055 [2023-04-02 06:29:38,113 INFO L226 Difference]: Without dead ends: 8664 [2023-04-02 06:29:38,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2023-04-02 06:29:38,115 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 1001 mSDsluCounter, 3956 mSDsCounter, 0 mSdLazyCounter, 2222 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 4380 SdHoareTripleChecker+Invalid, 2240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:38,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1001 Valid, 4380 Invalid, 2240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2222 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-02 06:29:38,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8664 states. [2023-04-02 06:29:39,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8664 to 1158. [2023-04-02 06:29:39,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1154 states have (on average 1.4350086655112653) internal successors, (1656), 1154 states have internal predecessors, (1656), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1659 transitions. [2023-04-02 06:29:39,117 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1659 transitions. Word has length 77 [2023-04-02 06:29:39,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:39,117 INFO L495 AbstractCegarLoop]: Abstraction has 1158 states and 1659 transitions. [2023-04-02 06:29:39,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 17 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:39,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1659 transitions. [2023-04-02 06:29:39,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-02 06:29:39,118 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:39,118 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:29:39,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-04-02 06:29:39,118 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:39,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:39,118 INFO L85 PathProgramCache]: Analyzing trace with hash -129003857, now seen corresponding path program 1 times [2023-04-02 06:29:39,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:39,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208542584] [2023-04-02 06:29:39,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:39,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:39,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:39,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:39,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208542584] [2023-04-02 06:29:39,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208542584] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:39,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:39,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:29:39,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17250841] [2023-04-02 06:29:39,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:39,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:29:39,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:39,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:29:39,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:29:39,297 INFO L87 Difference]: Start difference. First operand 1158 states and 1659 transitions. Second operand has 8 states, 7 states have (on average 14.0) internal successors, (98), 6 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:43,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:43,860 INFO L93 Difference]: Finished difference Result 5570 states and 8047 transitions. [2023-04-02 06:29:43,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 06:29:43,860 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.0) internal successors, (98), 6 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2023-04-02 06:29:43,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:43,865 INFO L225 Difference]: With dead ends: 5570 [2023-04-02 06:29:43,865 INFO L226 Difference]: Without dead ends: 4500 [2023-04-02 06:29:43,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-04-02 06:29:43,877 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 1056 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:43,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1056 Valid, 302 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:29:43,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4500 states. [2023-04-02 06:29:45,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4500 to 2446. [2023-04-02 06:29:45,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2446 states, 2442 states have (on average 1.4443079443079443) internal successors, (3527), 2442 states have internal predecessors, (3527), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:45,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3530 transitions. [2023-04-02 06:29:45,937 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3530 transitions. Word has length 101 [2023-04-02 06:29:45,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:45,938 INFO L495 AbstractCegarLoop]: Abstraction has 2446 states and 3530 transitions. [2023-04-02 06:29:45,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.0) internal successors, (98), 6 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:45,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3530 transitions. [2023-04-02 06:29:45,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-02 06:29:45,944 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:45,944 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:29:45,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-04-02 06:29:45,945 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:45,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:45,945 INFO L85 PathProgramCache]: Analyzing trace with hash 293564597, now seen corresponding path program 1 times [2023-04-02 06:29:45,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:45,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364230060] [2023-04-02 06:29:45,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:45,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:46,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:46,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:46,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364230060] [2023-04-02 06:29:46,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364230060] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:46,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:46,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:29:46,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689424736] [2023-04-02 06:29:46,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:46,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:29:46,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:46,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:29:46,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:29:46,110 INFO L87 Difference]: Start difference. First operand 2446 states and 3530 transitions. Second operand has 8 states, 7 states have (on average 14.0) internal successors, (98), 6 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:54,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:29:54,227 INFO L93 Difference]: Finished difference Result 10754 states and 15596 transitions. [2023-04-02 06:29:54,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 06:29:54,228 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.0) internal successors, (98), 6 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2023-04-02 06:29:54,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:29:54,237 INFO L225 Difference]: With dead ends: 10754 [2023-04-02 06:29:54,237 INFO L226 Difference]: Without dead ends: 8396 [2023-04-02 06:29:54,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-04-02 06:29:54,240 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 1231 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1231 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:29:54,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1231 Valid, 296 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:29:54,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8396 states. [2023-04-02 06:29:58,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8396 to 5242. [2023-04-02 06:29:58,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5242 states, 5238 states have (on average 1.446544482626957) internal successors, (7577), 5238 states have internal predecessors, (7577), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:58,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5242 states to 5242 states and 7580 transitions. [2023-04-02 06:29:58,799 INFO L78 Accepts]: Start accepts. Automaton has 5242 states and 7580 transitions. Word has length 101 [2023-04-02 06:29:58,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:29:58,799 INFO L495 AbstractCegarLoop]: Abstraction has 5242 states and 7580 transitions. [2023-04-02 06:29:58,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.0) internal successors, (98), 6 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:29:58,799 INFO L276 IsEmpty]: Start isEmpty. Operand 5242 states and 7580 transitions. [2023-04-02 06:29:58,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-02 06:29:58,800 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:29:58,800 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:29:58,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-04-02 06:29:58,801 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:29:58,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:29:58,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1755142971, now seen corresponding path program 1 times [2023-04-02 06:29:58,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:29:58,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562296277] [2023-04-02 06:29:58,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:29:58,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:29:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:58,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:29:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:29:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:29:58,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:29:58,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562296277] [2023-04-02 06:29:58,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562296277] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:29:58,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:29:58,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:29:58,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440097722] [2023-04-02 06:29:58,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:29:58,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:29:58,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:29:58,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:29:58,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:29:58,976 INFO L87 Difference]: Start difference. First operand 5242 states and 7580 transitions. Second operand has 8 states, 7 states have (on average 14.0) internal successors, (98), 6 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:30:16,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:30:16,388 INFO L93 Difference]: Finished difference Result 24490 states and 35492 transitions. [2023-04-02 06:30:16,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 06:30:16,389 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.0) internal successors, (98), 6 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2023-04-02 06:30:16,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:30:16,417 INFO L225 Difference]: With dead ends: 24490 [2023-04-02 06:30:16,417 INFO L226 Difference]: Without dead ends: 19336 [2023-04-02 06:30:16,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-04-02 06:30:16,425 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 953 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 953 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:30:16,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [953 Valid, 373 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:30:16,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19336 states. [2023-04-02 06:30:26,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19336 to 11274. [2023-04-02 06:30:26,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11274 states, 11270 states have (on average 1.4456965394853594) internal successors, (16293), 11270 states have internal predecessors, (16293), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:30:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11274 states to 11274 states and 16296 transitions. [2023-04-02 06:30:26,225 INFO L78 Accepts]: Start accepts. Automaton has 11274 states and 16296 transitions. Word has length 101 [2023-04-02 06:30:26,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:30:26,226 INFO L495 AbstractCegarLoop]: Abstraction has 11274 states and 16296 transitions. [2023-04-02 06:30:26,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.0) internal successors, (98), 6 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:30:26,226 INFO L276 IsEmpty]: Start isEmpty. Operand 11274 states and 16296 transitions. [2023-04-02 06:30:26,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-04-02 06:30:26,227 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:30:26,227 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:30:26,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-04-02 06:30:26,228 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:30:26,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:30:26,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1578506408, now seen corresponding path program 1 times [2023-04-02 06:30:26,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:30:26,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031922472] [2023-04-02 06:30:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:30:26,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:30:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:30:26,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:30:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:30:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:30:26,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:30:26,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031922472] [2023-04-02 06:30:26,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031922472] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:30:26,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:30:26,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 06:30:26,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717670518] [2023-04-02 06:30:26,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:30:26,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:30:26,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:30:26,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:30:26,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:30:26,425 INFO L87 Difference]: Start difference. First operand 11274 states and 16296 transitions. Second operand has 8 states, 7 states have (on average 14.142857142857142) internal successors, (99), 6 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:30:48,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:30:48,074 INFO L93 Difference]: Finished difference Result 35154 states and 50380 transitions. [2023-04-02 06:30:48,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 06:30:48,075 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.142857142857142) internal successors, (99), 6 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2023-04-02 06:30:48,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:30:48,107 INFO L225 Difference]: With dead ends: 35154 [2023-04-02 06:30:48,107 INFO L226 Difference]: Without dead ends: 23968 [2023-04-02 06:30:48,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-04-02 06:30:48,125 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 1043 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:30:48,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1043 Valid, 247 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:30:48,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23968 states. [2023-04-02 06:31:00,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23968 to 13482. [2023-04-02 06:31:00,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13482 states, 13478 states have (on average 1.424914675767918) internal successors, (19205), 13478 states have internal predecessors, (19205), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:31:00,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13482 states to 13482 states and 19208 transitions. [2023-04-02 06:31:00,236 INFO L78 Accepts]: Start accepts. Automaton has 13482 states and 19208 transitions. Word has length 102 [2023-04-02 06:31:00,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:31:00,237 INFO L495 AbstractCegarLoop]: Abstraction has 13482 states and 19208 transitions. [2023-04-02 06:31:00,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.142857142857142) internal successors, (99), 6 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:31:00,237 INFO L276 IsEmpty]: Start isEmpty. Operand 13482 states and 19208 transitions. [2023-04-02 06:31:00,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-04-02 06:31:00,242 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:31:00,242 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:31:00,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-04-02 06:31:00,243 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:31:00,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:31:00,243 INFO L85 PathProgramCache]: Analyzing trace with hash 868394261, now seen corresponding path program 1 times [2023-04-02 06:31:00,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:31:00,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651845069] [2023-04-02 06:31:00,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:31:00,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:31:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:31:00,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:31:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:31:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-02 06:31:00,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:31:00,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651845069] [2023-04-02 06:31:00,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651845069] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:31:00,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:31:00,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:31:00,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460149542] [2023-04-02 06:31:00,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:31:00,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:31:00,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:31:00,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:31:00,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:31:00,395 INFO L87 Difference]: Start difference. First operand 13482 states and 19208 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:31:12,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:31:12,247 INFO L93 Difference]: Finished difference Result 25822 states and 36738 transitions. [2023-04-02 06:31:12,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:31:12,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2023-04-02 06:31:12,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:31:12,268 INFO L225 Difference]: With dead ends: 25822 [2023-04-02 06:31:12,268 INFO L226 Difference]: Without dead ends: 12428 [2023-04-02 06:31:12,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:31:12,283 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 61 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:31:12,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 303 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:31:12,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12428 states. [2023-04-02 06:31:21,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12428 to 9474. [2023-04-02 06:31:21,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9474 states, 9470 states have (on average 1.4026399155227032) internal successors, (13283), 9470 states have internal predecessors, (13283), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:31:21,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9474 states to 9474 states and 13286 transitions. [2023-04-02 06:31:21,187 INFO L78 Accepts]: Start accepts. Automaton has 9474 states and 13286 transitions. Word has length 125 [2023-04-02 06:31:21,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:31:21,187 INFO L495 AbstractCegarLoop]: Abstraction has 9474 states and 13286 transitions. [2023-04-02 06:31:21,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:31:21,187 INFO L276 IsEmpty]: Start isEmpty. Operand 9474 states and 13286 transitions. [2023-04-02 06:31:21,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-04-02 06:31:21,191 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:31:21,191 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:31:21,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-04-02 06:31:21,191 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:31:21,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:31:21,191 INFO L85 PathProgramCache]: Analyzing trace with hash -174295443, now seen corresponding path program 1 times [2023-04-02 06:31:21,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:31:21,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863858217] [2023-04-02 06:31:21,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:31:21,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:31:21,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:31:21,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:31:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:31:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-02 06:31:21,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:31:21,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863858217] [2023-04-02 06:31:21,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863858217] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:31:21,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:31:21,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:31:21,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347273017] [2023-04-02 06:31:21,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:31:21,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:31:21,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:31:21,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:31:21,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:31:21,355 INFO L87 Difference]: Start difference. First operand 9474 states and 13286 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:31:30,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:31:30,391 INFO L93 Difference]: Finished difference Result 18136 states and 25378 transitions. [2023-04-02 06:31:30,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:31:30,391 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2023-04-02 06:31:30,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:31:30,401 INFO L225 Difference]: With dead ends: 18136 [2023-04-02 06:31:30,401 INFO L226 Difference]: Without dead ends: 8750 [2023-04-02 06:31:30,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:31:30,410 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 54 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:31:30,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 304 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:31:30,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8750 states. [2023-04-02 06:31:38,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8750 to 8484. [2023-04-02 06:31:38,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8484 states, 8480 states have (on average 1.3873820754716981) internal successors, (11765), 8480 states have internal predecessors, (11765), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:31:38,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8484 states to 8484 states and 11768 transitions. [2023-04-02 06:31:38,367 INFO L78 Accepts]: Start accepts. Automaton has 8484 states and 11768 transitions. Word has length 126 [2023-04-02 06:31:38,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:31:38,368 INFO L495 AbstractCegarLoop]: Abstraction has 8484 states and 11768 transitions. [2023-04-02 06:31:38,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:31:38,368 INFO L276 IsEmpty]: Start isEmpty. Operand 8484 states and 11768 transitions. [2023-04-02 06:31:38,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-04-02 06:31:38,370 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:31:38,370 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:31:38,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-04-02 06:31:38,371 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:31:38,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:31:38,371 INFO L85 PathProgramCache]: Analyzing trace with hash 326006104, now seen corresponding path program 1 times [2023-04-02 06:31:38,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:31:38,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776683720] [2023-04-02 06:31:38,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:31:38,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:31:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:31:38,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:31:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:31:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 06:31:38,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:31:38,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776683720] [2023-04-02 06:31:38,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776683720] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:31:38,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:31:38,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:31:38,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344122297] [2023-04-02 06:31:38,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:31:38,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:31:38,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:31:38,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:31:38,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:31:38,526 INFO L87 Difference]: Start difference. First operand 8484 states and 11768 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:31:51,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:31:51,805 INFO L93 Difference]: Finished difference Result 21106 states and 29162 transitions. [2023-04-02 06:31:51,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:31:51,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2023-04-02 06:31:51,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:31:51,823 INFO L225 Difference]: With dead ends: 21106 [2023-04-02 06:31:51,823 INFO L226 Difference]: Without dead ends: 12710 [2023-04-02 06:31:51,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:31:51,835 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 45 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:31:51,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 303 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:31:51,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12710 states. [2023-04-02 06:32:03,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12710 to 11784. [2023-04-02 06:32:03,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11784 states, 11780 states have (on average 1.3722410865874364) internal successors, (16165), 11780 states have internal predecessors, (16165), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:03,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11784 states to 11784 states and 16168 transitions. [2023-04-02 06:32:03,963 INFO L78 Accepts]: Start accepts. Automaton has 11784 states and 16168 transitions. Word has length 127 [2023-04-02 06:32:03,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:32:03,963 INFO L495 AbstractCegarLoop]: Abstraction has 11784 states and 16168 transitions. [2023-04-02 06:32:03,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 3 states have internal predecessors, (118), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:03,963 INFO L276 IsEmpty]: Start isEmpty. Operand 11784 states and 16168 transitions. [2023-04-02 06:32:03,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-04-02 06:32:03,966 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:32:03,966 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:32:03,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-04-02 06:32:03,966 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:32:03,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:32:03,966 INFO L85 PathProgramCache]: Analyzing trace with hash 730787594, now seen corresponding path program 1 times [2023-04-02 06:32:03,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:32:03,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718593527] [2023-04-02 06:32:03,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:32:03,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:32:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:04,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:32:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:32:04,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:32:04,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718593527] [2023-04-02 06:32:04,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718593527] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:32:04,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:32:04,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:32:04,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435298041] [2023-04-02 06:32:04,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:32:04,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:32:04,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:32:04,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:32:04,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:32:04,094 INFO L87 Difference]: Start difference. First operand 11784 states and 16168 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:18,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:32:18,218 INFO L93 Difference]: Finished difference Result 25796 states and 35370 transitions. [2023-04-02 06:32:18,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:32:18,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2023-04-02 06:32:18,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:32:18,238 INFO L225 Difference]: With dead ends: 25796 [2023-04-02 06:32:18,238 INFO L226 Difference]: Without dead ends: 14100 [2023-04-02 06:32:18,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:32:18,250 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 65 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:32:18,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 309 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:32:18,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14100 states. [2023-04-02 06:32:31,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14100 to 13614. [2023-04-02 06:32:31,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13614 states, 13610 states have (on average 1.3496693607641441) internal successors, (18369), 13610 states have internal predecessors, (18369), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:31,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13614 states to 13614 states and 18372 transitions. [2023-04-02 06:32:31,911 INFO L78 Accepts]: Start accepts. Automaton has 13614 states and 18372 transitions. Word has length 128 [2023-04-02 06:32:31,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:32:31,912 INFO L495 AbstractCegarLoop]: Abstraction has 13614 states and 18372 transitions. [2023-04-02 06:32:31,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 3 states have internal predecessors, (125), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:31,913 INFO L276 IsEmpty]: Start isEmpty. Operand 13614 states and 18372 transitions. [2023-04-02 06:32:31,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-04-02 06:32:31,930 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:32:31,930 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:32:31,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-04-02 06:32:31,931 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:32:31,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:32:31,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1891550225, now seen corresponding path program 1 times [2023-04-02 06:32:31,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:32:31,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5592473] [2023-04-02 06:32:31,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:32:31,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:32:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:32,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:32:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:32:32,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:32:32,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5592473] [2023-04-02 06:32:32,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5592473] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:32:32,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668295224] [2023-04-02 06:32:32,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:32:32,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:32:32,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:32:32,438 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 06:32:32,480 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 06:32:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:32,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 56 conjunts are in the unsatisfiable core [2023-04-02 06:32:32,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:32:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-02 06:32:35,831 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 06:32:35,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668295224] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:32:35,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 06:32:35,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [12] total 40 [2023-04-02 06:32:35,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980923205] [2023-04-02 06:32:35,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:32:35,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-02 06:32:35,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:32:35,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-02 06:32:35,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1403, Unknown=0, NotChecked=0, Total=1560 [2023-04-02 06:32:35,833 INFO L87 Difference]: Start difference. First operand 13614 states and 18372 transitions. Second operand has 29 states, 29 states have (on average 3.896551724137931) internal successors, (113), 29 states have internal predecessors, (113), 1 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)