/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_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 06:52:13,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 06:52:13,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 06:52:13,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 06:52:13,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 06:52:13,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 06:52:13,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 06:52:13,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 06:52:13,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 06:52:13,481 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 06:52:13,482 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 06:52:13,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 06:52:13,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 06:52:13,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 06:52:13,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 06:52:13,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 06:52:13,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 06:52:13,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 06:52:13,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 06:52:13,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 06:52:13,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 06:52:13,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 06:52:13,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 06:52:13,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 06:52:13,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 06:52:13,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 06:52:13,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 06:52:13,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 06:52:13,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 06:52:13,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 06:52:13,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 06:52:13,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 06:52:13,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 06:52:13,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 06:52:13,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 06:52:13,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 06:52:13,514 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 06:52:13,553 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 06:52:13,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 06:52:13,554 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 06:52:13,554 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 06:52:13,555 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 06:52:13,555 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 06:52:13,556 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 06:52:13,556 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 06:52:13,556 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 06:52:13,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 06:52:13,557 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 06:52:13,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 06:52:13,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 06:52:13,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 06:52:13,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 06:52:13,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 06:52:13,558 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 06:52:13,558 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 06:52:13,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 06:52:13,558 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 06:52:13,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 06:52:13,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 06:52:13,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 06:52:13,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 06:52:13,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:52:13,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 06:52:13,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 06:52:13,559 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 06:52:13,560 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 06:52:13,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 06:52:13,560 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 06:52:13,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 06:52:13,560 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 06:52:13,560 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 06:52:13,560 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 06:52:13,560 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 06:52:13,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 06:52:13,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 06:52:13,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 06:52:13,820 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 06:52:13,820 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 06:52:13,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-02 06:52:15,067 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 06:52:15,310 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 06:52:15,310 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-02 06:52:15,325 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df8a11df1/27a6050db3b549c4a57374332cca5d2e/FLAG5236420fd [2023-04-02 06:52:15,344 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df8a11df1/27a6050db3b549c4a57374332cca5d2e [2023-04-02 06:52:15,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 06:52:15,349 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 06:52:15,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 06:52:15,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 06:52:15,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 06:52:15,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:52:15" (1/1) ... [2023-04-02 06:52:15,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e730ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:52:15, skipping insertion in model container [2023-04-02 06:52:15,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:52:15" (1/1) ... [2023-04-02 06:52:15,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 06:52:15,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 06:52:15,591 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_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7804,7817] [2023-04-02 06:52:15,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:52:15,661 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 06:52:15,708 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_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7804,7817] [2023-04-02 06:52:15,730 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:52:15,751 INFO L208 MainTranslator]: Completed translation [2023-04-02 06:52:15,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:52:15 WrapperNode [2023-04-02 06:52:15,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 06:52:15,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 06:52:15,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 06:52:15,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 06:52:15,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:52:15" (1/1) ... [2023-04-02 06:52:15,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:52:15" (1/1) ... [2023-04-02 06:52:15,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:52:15" (1/1) ... [2023-04-02 06:52:15,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:52:15" (1/1) ... [2023-04-02 06:52:15,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:52:15" (1/1) ... [2023-04-02 06:52:15,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:52:15" (1/1) ... [2023-04-02 06:52:15,821 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:52:15" (1/1) ... [2023-04-02 06:52:15,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:52:15" (1/1) ... [2023-04-02 06:52:15,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 06:52:15,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 06:52:15,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 06:52:15,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 06:52:15,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:52:15" (1/1) ... [2023-04-02 06:52:15,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:52:15,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:52:15,871 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 06:52:15,898 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 06:52:15,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 06:52:15,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 06:52:15,920 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 06:52:15,921 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 06:52:15,921 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 06:52:15,921 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 06:52:15,921 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 06:52:15,921 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 06:52:15,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 06:52:15,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 06:52:15,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 06:52:15,922 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 06:52:15,922 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 06:52:15,922 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 06:52:15,922 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 06:52:15,922 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 06:52:15,922 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 06:52:15,922 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 06:52:15,922 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 06:52:15,922 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 06:52:15,923 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 06:52:15,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 06:52:15,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 06:52:15,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 06:52:15,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 06:52:15,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 06:52:15,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 06:52:16,062 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 06:52:16,064 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 06:52:16,694 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 06:52:16,702 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 06:52:16,703 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 06:52:16,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:52:16 BoogieIcfgContainer [2023-04-02 06:52:16,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 06:52:16,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 06:52:16,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 06:52:16,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 06:52:16,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 06:52:15" (1/3) ... [2023-04-02 06:52:16,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0939cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:52:16, skipping insertion in model container [2023-04-02 06:52:16,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:52:15" (2/3) ... [2023-04-02 06:52:16,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0939cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:52:16, skipping insertion in model container [2023-04-02 06:52:16,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:52:16" (3/3) ... [2023-04-02 06:52:16,712 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-02 06:52:16,727 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 06:52:16,727 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 06:52:16,777 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 06:52:16,783 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;@7967a4a1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 06:52:16,783 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 06:52:16,788 INFO L276 IsEmpty]: Start isEmpty. Operand has 160 states, 148 states have (on average 1.7567567567567568) internal successors, (260), 155 states have internal predecessors, (260), 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 06:52:16,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-02 06:52:16,797 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:16,798 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] [2023-04-02 06:52:16,799 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:16,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:16,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1104708850, now seen corresponding path program 1 times [2023-04-02 06:52:16,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:16,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571462973] [2023-04-02 06:52:16,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:16,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:17,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:17,547 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 06:52:17,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:17,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571462973] [2023-04-02 06:52:17,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571462973] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:17,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:17,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:52:17,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997271414] [2023-04-02 06:52:17,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:17,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:52:17,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:17,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:52:17,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:52:17,611 INFO L87 Difference]: Start difference. First operand has 160 states, 148 states have (on average 1.7567567567567568) internal successors, (260), 155 states have internal predecessors, (260), 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 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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 06:52:18,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:18,483 INFO L93 Difference]: Finished difference Result 346 states and 554 transitions. [2023-04-02 06:52:18,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:52:18,486 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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 66 [2023-04-02 06:52:18,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:18,503 INFO L225 Difference]: With dead ends: 346 [2023-04-02 06:52:18,503 INFO L226 Difference]: Without dead ends: 228 [2023-04-02 06:52:18,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:52:18,516 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 154 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:18,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 462 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:52:18,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-04-02 06:52:18,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 226. [2023-04-02 06:52:18,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 222 states have (on average 1.5225225225225225) internal successors, (338), 222 states have internal predecessors, (338), 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 06:52:18,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 341 transitions. [2023-04-02 06:52:18,572 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 341 transitions. Word has length 66 [2023-04-02 06:52:18,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:18,573 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 341 transitions. [2023-04-02 06:52:18,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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 06:52:18,573 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 341 transitions. [2023-04-02 06:52:18,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 06:52:18,575 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:18,576 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 06:52:18,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 06:52:18,576 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:18,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:18,577 INFO L85 PathProgramCache]: Analyzing trace with hash -783591345, now seen corresponding path program 1 times [2023-04-02 06:52:18,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:18,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44129649] [2023-04-02 06:52:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:18,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:18,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:18,856 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 06:52:18,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:18,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44129649] [2023-04-02 06:52:18,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44129649] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:18,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:18,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:52:18,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103810929] [2023-04-02 06:52:18,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:18,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:52:18,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:18,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:52:18,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:52:18,859 INFO L87 Difference]: Start difference. First operand 226 states and 341 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 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 06:52:19,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:19,472 INFO L93 Difference]: Finished difference Result 540 states and 837 transitions. [2023-04-02 06:52:19,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:52:19,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 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 68 [2023-04-02 06:52:19,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:19,478 INFO L225 Difference]: With dead ends: 540 [2023-04-02 06:52:19,478 INFO L226 Difference]: Without dead ends: 375 [2023-04-02 06:52:19,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:52:19,490 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 120 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:19,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 403 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:52:19,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-04-02 06:52:19,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 373. [2023-04-02 06:52:19,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 369 states have (on average 1.5420054200542006) internal successors, (569), 369 states have internal predecessors, (569), 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 06:52:19,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 572 transitions. [2023-04-02 06:52:19,523 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 572 transitions. Word has length 68 [2023-04-02 06:52:19,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:19,524 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 572 transitions. [2023-04-02 06:52:19,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 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 06:52:19,524 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 572 transitions. [2023-04-02 06:52:19,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 06:52:19,527 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:19,527 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 06:52:19,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 06:52:19,527 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:19,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:19,528 INFO L85 PathProgramCache]: Analyzing trace with hash -279794224, now seen corresponding path program 1 times [2023-04-02 06:52:19,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:19,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345134796] [2023-04-02 06:52:19,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:19,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:19,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:19,845 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 06:52:19,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:19,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345134796] [2023-04-02 06:52:19,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345134796] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:19,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:19,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:52:19,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343095975] [2023-04-02 06:52:19,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:19,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:52:19,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:19,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:52:19,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:52:19,848 INFO L87 Difference]: Start difference. First operand 373 states and 572 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 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 06:52:20,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:20,402 INFO L93 Difference]: Finished difference Result 965 states and 1502 transitions. [2023-04-02 06:52:20,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:52:20,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 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 70 [2023-04-02 06:52:20,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:20,408 INFO L225 Difference]: With dead ends: 965 [2023-04-02 06:52:20,408 INFO L226 Difference]: Without dead ends: 653 [2023-04-02 06:52:20,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:52:20,416 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 114 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:20,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 404 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:52:20,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2023-04-02 06:52:20,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 651. [2023-04-02 06:52:20,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 647 states have (on average 1.5471406491499227) internal successors, (1001), 647 states have internal predecessors, (1001), 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 06:52:20,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1004 transitions. [2023-04-02 06:52:20,473 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1004 transitions. Word has length 70 [2023-04-02 06:52:20,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:20,474 INFO L495 AbstractCegarLoop]: Abstraction has 651 states and 1004 transitions. [2023-04-02 06:52:20,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 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 06:52:20,474 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1004 transitions. [2023-04-02 06:52:20,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-02 06:52:20,484 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:20,485 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 06:52:20,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 06:52:20,485 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:20,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:20,486 INFO L85 PathProgramCache]: Analyzing trace with hash -919561455, now seen corresponding path program 1 times [2023-04-02 06:52:20,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:20,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957876443] [2023-04-02 06:52:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:20,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:20,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:20,790 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 06:52:20,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:20,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957876443] [2023-04-02 06:52:20,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957876443] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:20,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:20,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:52:20,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865360221] [2023-04-02 06:52:20,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:20,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:52:20,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:20,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:52:20,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:52:20,793 INFO L87 Difference]: Start difference. First operand 651 states and 1004 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 06:52:21,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:21,572 INFO L93 Difference]: Finished difference Result 2789 states and 4394 transitions. [2023-04-02 06:52:21,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 06:52:21,573 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 06:52:21,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:21,583 INFO L225 Difference]: With dead ends: 2789 [2023-04-02 06:52:21,583 INFO L226 Difference]: Without dead ends: 2189 [2023-04-02 06:52:21,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-04-02 06:52:21,586 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 852 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:21,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 1528 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:52:21,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2023-04-02 06:52:21,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 1146. [2023-04-02 06:52:21,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1142 states have (on average 1.5674255691768826) internal successors, (1790), 1142 states have internal predecessors, (1790), 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 06:52:21,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 1793 transitions. [2023-04-02 06:52:21,683 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 1793 transitions. Word has length 72 [2023-04-02 06:52:21,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:21,684 INFO L495 AbstractCegarLoop]: Abstraction has 1146 states and 1793 transitions. [2023-04-02 06:52:21,684 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 06:52:21,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 1793 transitions. [2023-04-02 06:52:21,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 06:52:21,686 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:21,686 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 06:52:21,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 06:52:21,686 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:21,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:21,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1496755519, now seen corresponding path program 1 times [2023-04-02 06:52:21,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:21,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065828899] [2023-04-02 06:52:21,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:21,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:21,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:21,990 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 06:52:21,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:21,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065828899] [2023-04-02 06:52:21,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065828899] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:21,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:21,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:52:21,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604520255] [2023-04-02 06:52:21,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:21,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 06:52:21,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:21,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 06:52:21,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:52:22,000 INFO L87 Difference]: Start difference. First operand 1146 states and 1793 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 06:52:22,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:22,696 INFO L93 Difference]: Finished difference Result 3329 states and 5259 transitions. [2023-04-02 06:52:22,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 06:52:22,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 73 [2023-04-02 06:52:22,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:22,706 INFO L225 Difference]: With dead ends: 3329 [2023-04-02 06:52:22,706 INFO L226 Difference]: Without dead ends: 2244 [2023-04-02 06:52:22,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:52:22,710 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 409 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:22,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 743 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:52:22,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2023-04-02 06:52:22,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1683. [2023-04-02 06:52:22,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1679 states have (on average 1.5687909469922574) internal successors, (2634), 1679 states have internal predecessors, (2634), 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 06:52:22,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 2637 transitions. [2023-04-02 06:52:22,853 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 2637 transitions. Word has length 73 [2023-04-02 06:52:22,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:22,854 INFO L495 AbstractCegarLoop]: Abstraction has 1683 states and 2637 transitions. [2023-04-02 06:52:22,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 06:52:22,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 2637 transitions. [2023-04-02 06:52:22,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-02 06:52:22,855 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:22,856 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 06:52:22,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 06:52:22,856 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:22,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:22,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1506554613, now seen corresponding path program 1 times [2023-04-02 06:52:22,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:22,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309871069] [2023-04-02 06:52:22,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:22,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:23,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:23,100 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 06:52:23,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:23,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309871069] [2023-04-02 06:52:23,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309871069] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:23,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:23,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:52:23,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96670246] [2023-04-02 06:52:23,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:23,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:52:23,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:23,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:52:23,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:52:23,102 INFO L87 Difference]: Start difference. First operand 1683 states and 2637 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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 06:52:24,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:24,014 INFO L93 Difference]: Finished difference Result 3678 states and 5777 transitions. [2023-04-02 06:52:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:52:24,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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 74 [2023-04-02 06:52:24,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:24,025 INFO L225 Difference]: With dead ends: 3678 [2023-04-02 06:52:24,025 INFO L226 Difference]: Without dead ends: 2520 [2023-04-02 06:52:24,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:52:24,030 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 127 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:24,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 496 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:52:24,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2023-04-02 06:52:24,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 2518. [2023-04-02 06:52:24,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2518 states, 2514 states have (on average 1.558472553699284) internal successors, (3918), 2514 states have internal predecessors, (3918), 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 06:52:24,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2518 states to 2518 states and 3921 transitions. [2023-04-02 06:52:24,232 INFO L78 Accepts]: Start accepts. Automaton has 2518 states and 3921 transitions. Word has length 74 [2023-04-02 06:52:24,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:24,232 INFO L495 AbstractCegarLoop]: Abstraction has 2518 states and 3921 transitions. [2023-04-02 06:52:24,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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 06:52:24,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2518 states and 3921 transitions. [2023-04-02 06:52:24,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-02 06:52:24,237 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:24,237 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 06:52:24,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 06:52:24,237 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:24,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:24,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1850365865, now seen corresponding path program 1 times [2023-04-02 06:52:24,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:24,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620488929] [2023-04-02 06:52:24,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:24,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:24,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:24,504 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 06:52:24,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:24,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620488929] [2023-04-02 06:52:24,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620488929] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:24,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:24,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:52:24,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505519996] [2023-04-02 06:52:24,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:24,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:52:24,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:24,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:52:24,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:52:24,507 INFO L87 Difference]: Start difference. First operand 2518 states and 3921 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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 06:52:25,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:25,455 INFO L93 Difference]: Finished difference Result 4878 states and 7604 transitions. [2023-04-02 06:52:25,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:52:25,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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 74 [2023-04-02 06:52:25,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:25,468 INFO L225 Difference]: With dead ends: 4878 [2023-04-02 06:52:25,468 INFO L226 Difference]: Without dead ends: 3486 [2023-04-02 06:52:25,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:52:25,471 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 121 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:25,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 478 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:52:25,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2023-04-02 06:52:25,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 3484. [2023-04-02 06:52:25,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3484 states, 3480 states have (on average 1.5459770114942528) internal successors, (5380), 3480 states have internal predecessors, (5380), 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 06:52:25,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3484 states to 3484 states and 5383 transitions. [2023-04-02 06:52:25,732 INFO L78 Accepts]: Start accepts. Automaton has 3484 states and 5383 transitions. Word has length 74 [2023-04-02 06:52:25,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:25,733 INFO L495 AbstractCegarLoop]: Abstraction has 3484 states and 5383 transitions. [2023-04-02 06:52:25,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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 06:52:25,733 INFO L276 IsEmpty]: Start isEmpty. Operand 3484 states and 5383 transitions. [2023-04-02 06:52:25,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-02 06:52:25,734 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:25,734 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 06:52:25,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 06:52:25,734 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:25,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:25,735 INFO L85 PathProgramCache]: Analyzing trace with hash -742056249, now seen corresponding path program 1 times [2023-04-02 06:52:25,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:25,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630292681] [2023-04-02 06:52:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:25,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:25,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:25,959 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 06:52:25,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:25,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630292681] [2023-04-02 06:52:25,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630292681] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:25,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:25,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:52:25,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920835289] [2023-04-02 06:52:25,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:25,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:52:25,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:25,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:52:25,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:52:25,962 INFO L87 Difference]: Start difference. First operand 3484 states and 5383 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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 06:52:26,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:26,968 INFO L93 Difference]: Finished difference Result 6654 states and 10284 transitions. [2023-04-02 06:52:26,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:52:26,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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 74 [2023-04-02 06:52:26,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:26,989 INFO L225 Difference]: With dead ends: 6654 [2023-04-02 06:52:26,989 INFO L226 Difference]: Without dead ends: 4747 [2023-04-02 06:52:26,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:52:26,998 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 115 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:26,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 455 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:52:27,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4747 states. [2023-04-02 06:52:27,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4747 to 4745. [2023-04-02 06:52:27,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4745 states, 4741 states have (on average 1.5304788019405189) internal successors, (7256), 4741 states have internal predecessors, (7256), 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 06:52:27,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4745 states to 4745 states and 7259 transitions. [2023-04-02 06:52:27,474 INFO L78 Accepts]: Start accepts. Automaton has 4745 states and 7259 transitions. Word has length 74 [2023-04-02 06:52:27,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:27,474 INFO L495 AbstractCegarLoop]: Abstraction has 4745 states and 7259 transitions. [2023-04-02 06:52:27,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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 06:52:27,474 INFO L276 IsEmpty]: Start isEmpty. Operand 4745 states and 7259 transitions. [2023-04-02 06:52:27,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-02 06:52:27,475 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:27,475 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, 1, 1, 1, 1] [2023-04-02 06:52:27,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 06:52:27,476 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:27,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:27,477 INFO L85 PathProgramCache]: Analyzing trace with hash 918138323, now seen corresponding path program 1 times [2023-04-02 06:52:27,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:27,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085908459] [2023-04-02 06:52:27,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:27,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:27,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:27,906 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 06:52:27,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:27,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085908459] [2023-04-02 06:52:27,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085908459] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:27,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:27,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:52:27,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003384235] [2023-04-02 06:52:27,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:27,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:52:27,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:27,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:52:27,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:52:27,909 INFO L87 Difference]: Start difference. First operand 4745 states and 7259 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 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 06:52:29,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:29,072 INFO L93 Difference]: Finished difference Result 7907 states and 12006 transitions. [2023-04-02 06:52:29,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:52:29,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 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 81 [2023-04-02 06:52:29,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:29,113 INFO L225 Difference]: With dead ends: 7907 [2023-04-02 06:52:29,113 INFO L226 Difference]: Without dead ends: 7905 [2023-04-02 06:52:29,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:52:29,119 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 260 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:29,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 1038 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:52:29,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7905 states. [2023-04-02 06:52:29,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7905 to 4849. [2023-04-02 06:52:29,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4849 states, 4845 states have (on average 1.5135190918472652) internal successors, (7333), 4845 states have internal predecessors, (7333), 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 06:52:29,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4849 states to 4849 states and 7336 transitions. [2023-04-02 06:52:29,662 INFO L78 Accepts]: Start accepts. Automaton has 4849 states and 7336 transitions. Word has length 81 [2023-04-02 06:52:29,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:29,663 INFO L495 AbstractCegarLoop]: Abstraction has 4849 states and 7336 transitions. [2023-04-02 06:52:29,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 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 06:52:29,663 INFO L276 IsEmpty]: Start isEmpty. Operand 4849 states and 7336 transitions. [2023-04-02 06:52:29,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-02 06:52:29,665 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:29,665 INFO L195 NwaCegarLoop]: trace histogram [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 06:52:29,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 06:52:29,666 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:29,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:29,666 INFO L85 PathProgramCache]: Analyzing trace with hash 570167052, now seen corresponding path program 1 times [2023-04-02 06:52:29,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:29,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442607834] [2023-04-02 06:52:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:29,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:29,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:52:29,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:29,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442607834] [2023-04-02 06:52:29,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442607834] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:29,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:29,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:52:29,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429010897] [2023-04-02 06:52:29,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:29,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:52:29,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:29,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:52:29,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:52:29,977 INFO L87 Difference]: Start difference. First operand 4849 states and 7336 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 5 states have internal predecessors, (101), 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 06:52:31,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:31,688 INFO L93 Difference]: Finished difference Result 13065 states and 19800 transitions. [2023-04-02 06:52:31,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:52:31,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 5 states have internal predecessors, (101), 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 105 [2023-04-02 06:52:31,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:31,716 INFO L225 Difference]: With dead ends: 13065 [2023-04-02 06:52:31,717 INFO L226 Difference]: Without dead ends: 11047 [2023-04-02 06:52:31,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:52:31,727 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 518 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:31,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 1001 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:52:31,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11047 states. [2023-04-02 06:52:32,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11047 to 7925. [2023-04-02 06:52:32,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7925 states, 7921 states have (on average 1.5092791314228002) internal successors, (11955), 7921 states have internal predecessors, (11955), 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 06:52:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7925 states to 7925 states and 11958 transitions. [2023-04-02 06:52:32,522 INFO L78 Accepts]: Start accepts. Automaton has 7925 states and 11958 transitions. Word has length 105 [2023-04-02 06:52:32,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:32,522 INFO L495 AbstractCegarLoop]: Abstraction has 7925 states and 11958 transitions. [2023-04-02 06:52:32,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 5 states have internal predecessors, (101), 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 06:52:32,523 INFO L276 IsEmpty]: Start isEmpty. Operand 7925 states and 11958 transitions. [2023-04-02 06:52:32,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-02 06:52:32,527 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:32,527 INFO L195 NwaCegarLoop]: trace histogram [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 06:52:32,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 06:52:32,527 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:32,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:32,528 INFO L85 PathProgramCache]: Analyzing trace with hash -367879766, now seen corresponding path program 1 times [2023-04-02 06:52:32,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:32,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671830352] [2023-04-02 06:52:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:32,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:32,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 06:52:32,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:32,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671830352] [2023-04-02 06:52:32,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671830352] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:32,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:32,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:52:32,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568862702] [2023-04-02 06:52:32,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:32,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:52:32,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:32,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:52:32,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:52:32,850 INFO L87 Difference]: Start difference. First operand 7925 states and 11958 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 5 states have internal predecessors, (95), 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 06:52:34,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:34,613 INFO L93 Difference]: Finished difference Result 15792 states and 23913 transitions. [2023-04-02 06:52:34,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:52:34,614 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 5 states have internal predecessors, (95), 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 105 [2023-04-02 06:52:34,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:34,646 INFO L225 Difference]: With dead ends: 15792 [2023-04-02 06:52:34,646 INFO L226 Difference]: Without dead ends: 12568 [2023-04-02 06:52:34,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:52:34,660 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 515 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:34,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 1036 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:52:34,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12568 states. [2023-04-02 06:52:35,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12568 to 11191. [2023-04-02 06:52:35,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11191 states, 11187 states have (on average 1.5089836417270046) internal successors, (16881), 11187 states have internal predecessors, (16881), 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 06:52:35,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11191 states to 11191 states and 16884 transitions. [2023-04-02 06:52:35,610 INFO L78 Accepts]: Start accepts. Automaton has 11191 states and 16884 transitions. Word has length 105 [2023-04-02 06:52:35,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:35,610 INFO L495 AbstractCegarLoop]: Abstraction has 11191 states and 16884 transitions. [2023-04-02 06:52:35,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 5 states have internal predecessors, (95), 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 06:52:35,610 INFO L276 IsEmpty]: Start isEmpty. Operand 11191 states and 16884 transitions. [2023-04-02 06:52:35,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-02 06:52:35,613 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:35,613 INFO L195 NwaCegarLoop]: trace histogram [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 06:52:35,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 06:52:35,613 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:35,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:35,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1334665416, now seen corresponding path program 1 times [2023-04-02 06:52:35,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:35,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270348970] [2023-04-02 06:52:35,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:35,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:35,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 06:52:35,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:35,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270348970] [2023-04-02 06:52:35,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270348970] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:35,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:35,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:52:35,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615582947] [2023-04-02 06:52:35,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:35,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:52:35,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:35,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:52:35,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:52:35,931 INFO L87 Difference]: Start difference. First operand 11191 states and 16884 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 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 06:52:37,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:37,986 INFO L93 Difference]: Finished difference Result 17552 states and 26552 transitions. [2023-04-02 06:52:37,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:52:37,987 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 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 105 [2023-04-02 06:52:37,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:38,026 INFO L225 Difference]: With dead ends: 17552 [2023-04-02 06:52:38,027 INFO L226 Difference]: Without dead ends: 14328 [2023-04-02 06:52:38,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:52:38,041 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 526 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:38,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 999 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:52:38,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14328 states. [2023-04-02 06:52:39,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14328 to 13449. [2023-04-02 06:52:39,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13449 states, 13445 states have (on average 1.5085905541093343) internal successors, (20283), 13445 states have internal predecessors, (20283), 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 06:52:39,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13449 states to 13449 states and 20286 transitions. [2023-04-02 06:52:39,168 INFO L78 Accepts]: Start accepts. Automaton has 13449 states and 20286 transitions. Word has length 105 [2023-04-02 06:52:39,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:39,168 INFO L495 AbstractCegarLoop]: Abstraction has 13449 states and 20286 transitions. [2023-04-02 06:52:39,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 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 06:52:39,169 INFO L276 IsEmpty]: Start isEmpty. Operand 13449 states and 20286 transitions. [2023-04-02 06:52:39,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-02 06:52:39,172 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:39,172 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 06:52:39,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 06:52:39,172 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:39,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:39,173 INFO L85 PathProgramCache]: Analyzing trace with hash 433698980, now seen corresponding path program 1 times [2023-04-02 06:52:39,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:39,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179698590] [2023-04-02 06:52:39,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:39,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:39,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:52:39,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:39,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179698590] [2023-04-02 06:52:39,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179698590] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:39,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:39,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:52:39,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730294907] [2023-04-02 06:52:39,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:39,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 06:52:39,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:39,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 06:52:39,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:52:39,459 INFO L87 Difference]: Start difference. First operand 13449 states and 20286 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 06:52:41,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:41,653 INFO L93 Difference]: Finished difference Result 20976 states and 31787 transitions. [2023-04-02 06:52:41,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 06:52:41,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 106 [2023-04-02 06:52:41,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:41,699 INFO L225 Difference]: With dead ends: 20976 [2023-04-02 06:52:41,699 INFO L226 Difference]: Without dead ends: 17182 [2023-04-02 06:52:41,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:52:41,721 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 235 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:41,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 690 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:52:41,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17182 states. [2023-04-02 06:52:43,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17182 to 16330. [2023-04-02 06:52:43,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16330 states, 16326 states have (on average 1.5091877986034545) internal successors, (24639), 16326 states have internal predecessors, (24639), 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 06:52:43,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16330 states to 16330 states and 24642 transitions. [2023-04-02 06:52:43,261 INFO L78 Accepts]: Start accepts. Automaton has 16330 states and 24642 transitions. Word has length 106 [2023-04-02 06:52:43,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:43,261 INFO L495 AbstractCegarLoop]: Abstraction has 16330 states and 24642 transitions. [2023-04-02 06:52:43,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 06:52:43,262 INFO L276 IsEmpty]: Start isEmpty. Operand 16330 states and 24642 transitions. [2023-04-02 06:52:43,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-02 06:52:43,264 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:43,264 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 06:52:43,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 06:52:43,265 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:43,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:43,265 INFO L85 PathProgramCache]: Analyzing trace with hash 493835251, now seen corresponding path program 1 times [2023-04-02 06:52:43,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:43,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206573355] [2023-04-02 06:52:43,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:43,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:43,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:52:43,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:43,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206573355] [2023-04-02 06:52:43,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206573355] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:43,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:43,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:52:43,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539631032] [2023-04-02 06:52:43,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:43,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:52:43,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:43,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:52:43,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:52:43,514 INFO L87 Difference]: Start difference. First operand 16330 states and 24642 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 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 06:52:46,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:46,194 INFO L93 Difference]: Finished difference Result 34770 states and 52610 transitions. [2023-04-02 06:52:46,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:52:46,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 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 106 [2023-04-02 06:52:46,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:46,254 INFO L225 Difference]: With dead ends: 34770 [2023-04-02 06:52:46,254 INFO L226 Difference]: Without dead ends: 27328 [2023-04-02 06:52:46,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:52:46,284 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 105 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:46,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 396 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:52:46,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27328 states. [2023-04-02 06:52:48,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27328 to 27259. [2023-04-02 06:52:48,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27259 states, 27255 states have (on average 1.5080902586681344) internal successors, (41103), 27255 states have internal predecessors, (41103), 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 06:52:48,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27259 states to 27259 states and 41106 transitions. [2023-04-02 06:52:48,693 INFO L78 Accepts]: Start accepts. Automaton has 27259 states and 41106 transitions. Word has length 106 [2023-04-02 06:52:48,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:48,693 INFO L495 AbstractCegarLoop]: Abstraction has 27259 states and 41106 transitions. [2023-04-02 06:52:48,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 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 06:52:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 27259 states and 41106 transitions. [2023-04-02 06:52:48,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-02 06:52:48,697 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:48,697 INFO L195 NwaCegarLoop]: trace histogram [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 06:52:48,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-02 06:52:48,697 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:48,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:48,698 INFO L85 PathProgramCache]: Analyzing trace with hash 669996404, now seen corresponding path program 1 times [2023-04-02 06:52:48,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:48,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770465094] [2023-04-02 06:52:48,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:48,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:48,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:52:48,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:48,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770465094] [2023-04-02 06:52:48,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770465094] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:48,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:48,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:52:48,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401553404] [2023-04-02 06:52:48,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:48,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:52:48,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:48,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:52:48,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:52:48,956 INFO L87 Difference]: Start difference. First operand 27259 states and 41106 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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 06:52:53,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:52:53,933 INFO L93 Difference]: Finished difference Result 79865 states and 120189 transitions. [2023-04-02 06:52:53,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:52:53,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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 107 [2023-04-02 06:52:53,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:52:54,058 INFO L225 Difference]: With dead ends: 79865 [2023-04-02 06:52:54,059 INFO L226 Difference]: Without dead ends: 52701 [2023-04-02 06:52:54,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:52:54,125 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 166 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:52:54,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 531 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:52:54,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52701 states. [2023-04-02 06:52:59,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52701 to 52699. [2023-04-02 06:52:59,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52699 states, 52695 states have (on average 1.492741246797609) internal successors, (78660), 52695 states have internal predecessors, (78660), 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 06:52:59,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52699 states to 52699 states and 78663 transitions. [2023-04-02 06:52:59,466 INFO L78 Accepts]: Start accepts. Automaton has 52699 states and 78663 transitions. Word has length 107 [2023-04-02 06:52:59,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:59,466 INFO L495 AbstractCegarLoop]: Abstraction has 52699 states and 78663 transitions. [2023-04-02 06:52:59,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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 06:52:59,466 INFO L276 IsEmpty]: Start isEmpty. Operand 52699 states and 78663 transitions. [2023-04-02 06:52:59,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-02 06:52:59,470 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:59,470 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 06:52:59,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-02 06:52:59,470 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:59,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:59,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1039615772, now seen corresponding path program 1 times [2023-04-02 06:52:59,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:59,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139789461] [2023-04-02 06:52:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:59,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:59,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:52:59,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:59,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139789461] [2023-04-02 06:52:59,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139789461] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:59,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:59,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:52:59,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073065375] [2023-04-02 06:52:59,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:59,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:52:59,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:59,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:52:59,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:52:59,760 INFO L87 Difference]: Start difference. First operand 52699 states and 78663 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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 06:53:04,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:53:04,125 INFO L93 Difference]: Finished difference Result 91992 states and 137506 transitions. [2023-04-02 06:53:04,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:53:04,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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 107 [2023-04-02 06:53:04,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:53:04,196 INFO L225 Difference]: With dead ends: 91992 [2023-04-02 06:53:04,196 INFO L226 Difference]: Without dead ends: 39466 [2023-04-02 06:53:04,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:53:04,250 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 86 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:53:04,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 478 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:53:04,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39466 states. [2023-04-02 06:53:08,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39466 to 39045. [2023-04-02 06:53:08,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39045 states, 39041 states have (on average 1.4870520734612331) internal successors, (58056), 39041 states have internal predecessors, (58056), 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 06:53:08,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39045 states to 39045 states and 58059 transitions. [2023-04-02 06:53:08,190 INFO L78 Accepts]: Start accepts. Automaton has 39045 states and 58059 transitions. Word has length 107 [2023-04-02 06:53:08,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:53:08,191 INFO L495 AbstractCegarLoop]: Abstraction has 39045 states and 58059 transitions. [2023-04-02 06:53:08,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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 06:53:08,191 INFO L276 IsEmpty]: Start isEmpty. Operand 39045 states and 58059 transitions. [2023-04-02 06:53:08,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-02 06:53:08,195 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:53:08,195 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 06:53:08,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-02 06:53:08,195 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:53:08,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:53:08,196 INFO L85 PathProgramCache]: Analyzing trace with hash 662929410, now seen corresponding path program 1 times [2023-04-02 06:53:08,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:53:08,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662441142] [2023-04-02 06:53:08,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:53:08,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:53:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:53:08,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:53:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:53:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:53:08,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:53:08,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662441142] [2023-04-02 06:53:08,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662441142] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:53:08,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:53:08,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:53:08,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295822026] [2023-04-02 06:53:08,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:53:08,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:53:08,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:53:08,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:53:08,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:53:08,473 INFO L87 Difference]: Start difference. First operand 39045 states and 58059 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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 06:53:10,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:53:10,231 INFO L93 Difference]: Finished difference Result 52945 states and 78757 transitions. [2023-04-02 06:53:10,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:53:10,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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 107 [2023-04-02 06:53:10,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:53:10,259 INFO L225 Difference]: With dead ends: 52945 [2023-04-02 06:53:10,259 INFO L226 Difference]: Without dead ends: 14075 [2023-04-02 06:53:10,304 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 06:53:10,304 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 73 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:53:10,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 429 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:53:10,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14075 states. [2023-04-02 06:53:12,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14075 to 13944. [2023-04-02 06:53:12,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13944 states, 13940 states have (on average 1.4785509325681492) internal successors, (20611), 13940 states have internal predecessors, (20611), 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 06:53:12,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13944 states to 13944 states and 20614 transitions. [2023-04-02 06:53:12,049 INFO L78 Accepts]: Start accepts. Automaton has 13944 states and 20614 transitions. Word has length 107 [2023-04-02 06:53:12,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:53:12,049 INFO L495 AbstractCegarLoop]: Abstraction has 13944 states and 20614 transitions. [2023-04-02 06:53:12,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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 06:53:12,049 INFO L276 IsEmpty]: Start isEmpty. Operand 13944 states and 20614 transitions. [2023-04-02 06:53:12,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-02 06:53:12,051 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:53:12,052 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 06:53:12,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-02 06:53:12,052 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:53:12,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:53:12,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1143069472, now seen corresponding path program 1 times [2023-04-02 06:53:12,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:53:12,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061671000] [2023-04-02 06:53:12,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:53:12,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:53:12,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:53:12,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:53:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:53:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:53:12,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:53:12,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061671000] [2023-04-02 06:53:12,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061671000] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:53:12,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:53:12,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:53:12,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702967066] [2023-04-02 06:53:12,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:53:12,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:53:12,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:53:12,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:53:12,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:53:12,343 INFO L87 Difference]: Start difference. First operand 13944 states and 20614 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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 06:53:13,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:53:13,392 INFO L93 Difference]: Finished difference Result 20363 states and 30117 transitions. [2023-04-02 06:53:13,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:53:13,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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 107 [2023-04-02 06:53:13,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:53:13,406 INFO L225 Difference]: With dead ends: 20363 [2023-04-02 06:53:13,407 INFO L226 Difference]: Without dead ends: 6594 [2023-04-02 06:53:13,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:53:13,424 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 60 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:53:13,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 380 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:53:13,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6594 states. [2023-04-02 06:53:14,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6594 to 6580. [2023-04-02 06:53:14,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6580 states, 6576 states have (on average 1.468521897810219) internal successors, (9657), 6576 states have internal predecessors, (9657), 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 06:53:14,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6580 states to 6580 states and 9660 transitions. [2023-04-02 06:53:14,199 INFO L78 Accepts]: Start accepts. Automaton has 6580 states and 9660 transitions. Word has length 107 [2023-04-02 06:53:14,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:53:14,199 INFO L495 AbstractCegarLoop]: Abstraction has 6580 states and 9660 transitions. [2023-04-02 06:53:14,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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 06:53:14,200 INFO L276 IsEmpty]: Start isEmpty. Operand 6580 states and 9660 transitions. [2023-04-02 06:53:14,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-02 06:53:14,202 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:53:14,202 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 06:53:14,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-02 06:53:14,202 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:53:14,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:53:14,203 INFO L85 PathProgramCache]: Analyzing trace with hash 725196719, now seen corresponding path program 1 times [2023-04-02 06:53:14,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:53:14,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998079238] [2023-04-02 06:53:14,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:53:14,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:53:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:53:14,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:53:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:53:14,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 06:53:14,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:53:14,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998079238] [2023-04-02 06:53:14,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998079238] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:53:14,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:53:14,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:53:14,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733974391] [2023-04-02 06:53:14,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:53:14,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 06:53:14,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:53:14,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 06:53:14,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:53:14,722 INFO L87 Difference]: Start difference. First operand 6580 states and 9660 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 06:53:17,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:53:17,000 INFO L93 Difference]: Finished difference Result 21495 states and 31402 transitions. [2023-04-02 06:53:17,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:53:17,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 108 [2023-04-02 06:53:17,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:53:17,021 INFO L225 Difference]: With dead ends: 21495 [2023-04-02 06:53:17,021 INFO L226 Difference]: Without dead ends: 15129 [2023-04-02 06:53:17,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:53:17,031 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 411 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:53:17,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 586 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:53:17,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15129 states. [2023-04-02 06:53:18,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15129 to 12882. [2023-04-02 06:53:18,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12882 states, 12878 states have (on average 1.4633483460164622) internal successors, (18845), 12878 states have internal predecessors, (18845), 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 06:53:18,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12882 states to 12882 states and 18848 transitions. [2023-04-02 06:53:18,448 INFO L78 Accepts]: Start accepts. Automaton has 12882 states and 18848 transitions. Word has length 108 [2023-04-02 06:53:18,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:53:18,449 INFO L495 AbstractCegarLoop]: Abstraction has 12882 states and 18848 transitions. [2023-04-02 06:53:18,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 06:53:18,449 INFO L276 IsEmpty]: Start isEmpty. Operand 12882 states and 18848 transitions. [2023-04-02 06:53:18,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-02 06:53:18,450 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:53:18,451 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 06:53:18,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-04-02 06:53:18,451 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:53:18,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:53:18,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2033952195, now seen corresponding path program 1 times [2023-04-02 06:53:18,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:53:18,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501172287] [2023-04-02 06:53:18,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:53:18,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:53:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:53:18,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:53:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:53:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 06:53:18,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:53:18,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501172287] [2023-04-02 06:53:18,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501172287] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:53:18,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:53:18,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:53:18,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352540362] [2023-04-02 06:53:18,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:53:18,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 06:53:18,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:53:18,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 06:53:18,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:53:18,892 INFO L87 Difference]: Start difference. First operand 12882 states and 18848 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 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 06:53:23,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:53:23,003 INFO L93 Difference]: Finished difference Result 43016 states and 62515 transitions. [2023-04-02 06:53:23,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:53:23,004 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 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 108 [2023-04-02 06:53:23,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:53:23,055 INFO L225 Difference]: With dead ends: 43016 [2023-04-02 06:53:23,055 INFO L226 Difference]: Without dead ends: 30348 [2023-04-02 06:53:23,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:53:23,071 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 394 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:53:23,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 600 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:53:23,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30348 states. [2023-04-02 06:53:26,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30348 to 25424. [2023-04-02 06:53:26,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25424 states, 25420 states have (on average 1.4569236821400473) internal successors, (37035), 25420 states have internal predecessors, (37035), 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 06:53:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25424 states to 25424 states and 37038 transitions. [2023-04-02 06:53:26,389 INFO L78 Accepts]: Start accepts. Automaton has 25424 states and 37038 transitions. Word has length 108 [2023-04-02 06:53:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:53:26,389 INFO L495 AbstractCegarLoop]: Abstraction has 25424 states and 37038 transitions. [2023-04-02 06:53:26,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 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 06:53:26,390 INFO L276 IsEmpty]: Start isEmpty. Operand 25424 states and 37038 transitions. [2023-04-02 06:53:26,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-02 06:53:26,391 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:53:26,391 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 06:53:26,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-04-02 06:53:26,391 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:53:26,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:53:26,392 INFO L85 PathProgramCache]: Analyzing trace with hash 277682546, now seen corresponding path program 1 times [2023-04-02 06:53:26,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:53:26,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122627376] [2023-04-02 06:53:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:53:26,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:53:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:53:26,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:53:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:53:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:53:26,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:53:26,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122627376] [2023-04-02 06:53:26,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122627376] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:53:26,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:53:26,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:53:26,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430086852] [2023-04-02 06:53:26,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:53:26,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:53:26,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:53:26,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:53:26,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:53:26,612 INFO L87 Difference]: Start difference. First operand 25424 states and 37038 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 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 06:53:33,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:53:33,359 INFO L93 Difference]: Finished difference Result 74596 states and 108374 transitions. [2023-04-02 06:53:33,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:53:33,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 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 109 [2023-04-02 06:53:33,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:53:33,456 INFO L225 Difference]: With dead ends: 74596 [2023-04-02 06:53:33,456 INFO L226 Difference]: Without dead ends: 49317 [2023-04-02 06:53:33,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:53:33,494 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 147 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:53:33,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 500 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:53:33,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49317 states. [2023-04-02 06:53:40,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49317 to 49315. [2023-04-02 06:53:40,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49315 states, 49311 states have (on average 1.4403277159254528) internal successors, (71024), 49311 states have internal predecessors, (71024), 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 06:53:40,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49315 states to 49315 states and 71027 transitions. [2023-04-02 06:53:40,378 INFO L78 Accepts]: Start accepts. Automaton has 49315 states and 71027 transitions. Word has length 109 [2023-04-02 06:53:40,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:53:40,379 INFO L495 AbstractCegarLoop]: Abstraction has 49315 states and 71027 transitions. [2023-04-02 06:53:40,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 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 06:53:40,379 INFO L276 IsEmpty]: Start isEmpty. Operand 49315 states and 71027 transitions. [2023-04-02 06:53:40,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-02 06:53:40,381 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:53:40,381 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 06:53:40,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-02 06:53:40,381 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:53:40,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:53:40,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1852849288, now seen corresponding path program 1 times [2023-04-02 06:53:40,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:53:40,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373237673] [2023-04-02 06:53:40,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:53:40,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:53:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:53:40,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:53:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:53:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 06:53:40,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:53:40,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373237673] [2023-04-02 06:53:40,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373237673] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:53:40,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:53:40,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:53:40,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020266906] [2023-04-02 06:53:40,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:53:40,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:53:40,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:53:40,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:53:40,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:53:40,749 INFO L87 Difference]: Start difference. First operand 49315 states and 71027 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 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 06:53:50,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:53:50,884 INFO L93 Difference]: Finished difference Result 120761 states and 173559 transitions. [2023-04-02 06:53:50,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:53:50,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 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 110 [2023-04-02 06:53:50,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:53:51,044 INFO L225 Difference]: With dead ends: 120761 [2023-04-02 06:53:51,045 INFO L226 Difference]: Without dead ends: 71725 [2023-04-02 06:53:51,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:53:51,091 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 106 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:53:51,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 425 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:53:51,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71725 states. [2023-04-02 06:53:58,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71725 to 49811. [2023-04-02 06:53:58,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49811 states, 49807 states have (on average 1.4408014937659366) internal successors, (71762), 49807 states have internal predecessors, (71762), 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 06:53:58,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49811 states to 49811 states and 71765 transitions. [2023-04-02 06:53:58,970 INFO L78 Accepts]: Start accepts. Automaton has 49811 states and 71765 transitions. Word has length 110 [2023-04-02 06:53:58,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:53:58,970 INFO L495 AbstractCegarLoop]: Abstraction has 49811 states and 71765 transitions. [2023-04-02 06:53:58,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 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 06:53:58,971 INFO L276 IsEmpty]: Start isEmpty. Operand 49811 states and 71765 transitions. [2023-04-02 06:53:58,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-02 06:53:58,973 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:53:58,973 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 06:53:58,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-04-02 06:53:58,973 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:53:58,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:53:58,974 INFO L85 PathProgramCache]: Analyzing trace with hash -234558056, now seen corresponding path program 1 times [2023-04-02 06:53:58,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:53:58,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184008703] [2023-04-02 06:53:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:53:58,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:53:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:53:59,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:53:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:53:59,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-02 06:53:59,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:53:59,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184008703] [2023-04-02 06:53:59,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184008703] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:53:59,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:53:59,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:53:59,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481762187] [2023-04-02 06:53:59,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:53:59,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:53:59,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:53:59,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:53:59,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:53:59,200 INFO L87 Difference]: Start difference. First operand 49811 states and 71765 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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 06:54:09,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:54:09,969 INFO L93 Difference]: Finished difference Result 119715 states and 171987 transitions. [2023-04-02 06:54:09,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:54:09,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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 110 [2023-04-02 06:54:09,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:54:10,108 INFO L225 Difference]: With dead ends: 119715 [2023-04-02 06:54:10,108 INFO L226 Difference]: Without dead ends: 70237 [2023-04-02 06:54:10,152 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 06:54:10,153 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 112 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:54:10,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 428 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:54:10,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70237 states. [2023-04-02 06:54:18,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70237 to 50307. [2023-04-02 06:54:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50307 states, 50303 states have (on average 1.4412659284734508) internal successors, (72500), 50303 states have internal predecessors, (72500), 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 06:54:18,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50307 states to 50307 states and 72503 transitions. [2023-04-02 06:54:18,281 INFO L78 Accepts]: Start accepts. Automaton has 50307 states and 72503 transitions. Word has length 110 [2023-04-02 06:54:18,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:54:18,281 INFO L495 AbstractCegarLoop]: Abstraction has 50307 states and 72503 transitions. [2023-04-02 06:54:18,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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 06:54:18,281 INFO L276 IsEmpty]: Start isEmpty. Operand 50307 states and 72503 transitions. [2023-04-02 06:54:18,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-04-02 06:54:18,283 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:54:18,283 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 06:54:18,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-04-02 06:54:18,283 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:54:18,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:54:18,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1435450169, now seen corresponding path program 1 times [2023-04-02 06:54:18,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:54:18,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153566868] [2023-04-02 06:54:18,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:54:18,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:54:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:54:18,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:54:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:54:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:54:18,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:54:18,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153566868] [2023-04-02 06:54:18,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153566868] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:54:18,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:54:18,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:54:18,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622339245] [2023-04-02 06:54:18,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:54:18,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 06:54:18,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:54:18,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 06:54:18,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:54:18,562 INFO L87 Difference]: Start difference. First operand 50307 states and 72503 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 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 06:54:28,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:54:28,617 INFO L93 Difference]: Finished difference Result 81081 states and 117226 transitions. [2023-04-02 06:54:28,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 06:54:28,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 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 113 [2023-04-02 06:54:28,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:54:28,719 INFO L225 Difference]: With dead ends: 81081 [2023-04-02 06:54:28,720 INFO L226 Difference]: Without dead ends: 59687 [2023-04-02 06:54:28,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:54:28,753 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 221 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:54:28,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 751 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:54:28,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59687 states. [2023-04-02 06:54:37,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59687 to 58915. [2023-04-02 06:54:37,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58915 states, 58911 states have (on average 1.4391200285175942) internal successors, (84780), 58911 states have internal predecessors, (84780), 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 06:54:37,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58915 states to 58915 states and 84783 transitions. [2023-04-02 06:54:37,548 INFO L78 Accepts]: Start accepts. Automaton has 58915 states and 84783 transitions. Word has length 113 [2023-04-02 06:54:37,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:54:37,548 INFO L495 AbstractCegarLoop]: Abstraction has 58915 states and 84783 transitions. [2023-04-02 06:54:37,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 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 06:54:37,548 INFO L276 IsEmpty]: Start isEmpty. Operand 58915 states and 84783 transitions. [2023-04-02 06:54:37,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-02 06:54:37,556 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:54:37,557 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2023-04-02 06:54:37,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-04-02 06:54:37,557 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:54:37,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:54:37,557 INFO L85 PathProgramCache]: Analyzing trace with hash -828722331, now seen corresponding path program 1 times [2023-04-02 06:54:37,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:54:37,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570722115] [2023-04-02 06:54:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:54:37,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:54:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:54:37,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:54:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:54:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 06:54:37,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:54:37,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570722115] [2023-04-02 06:54:37,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570722115] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:54:37,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:54:37,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:54:37,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062160807] [2023-04-02 06:54:37,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:54:37,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:54:37,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:54:37,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:54:37,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:54:37,810 INFO L87 Difference]: Start difference. First operand 58915 states and 84783 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 3 states have internal predecessors, (143), 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 06:54:46,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:54:46,210 INFO L93 Difference]: Finished difference Result 107787 states and 155189 transitions. [2023-04-02 06:54:46,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:54:46,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 3 states have internal predecessors, (143), 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 163 [2023-04-02 06:54:46,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:54:46,278 INFO L225 Difference]: With dead ends: 107787 [2023-04-02 06:54:46,278 INFO L226 Difference]: Without dead ends: 38717 [2023-04-02 06:54:46,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:54:46,336 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 99 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:54:46,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 509 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:54:46,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38717 states. [2023-04-02 06:54:52,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38717 to 36675. [2023-04-02 06:54:52,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36675 states, 36671 states have (on average 1.4242862207193696) internal successors, (52230), 36671 states have internal predecessors, (52230), 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 06:54:52,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36675 states to 36675 states and 52233 transitions. [2023-04-02 06:54:52,358 INFO L78 Accepts]: Start accepts. Automaton has 36675 states and 52233 transitions. Word has length 163 [2023-04-02 06:54:52,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:54:52,359 INFO L495 AbstractCegarLoop]: Abstraction has 36675 states and 52233 transitions. [2023-04-02 06:54:52,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 3 states have internal predecessors, (143), 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 06:54:52,359 INFO L276 IsEmpty]: Start isEmpty. Operand 36675 states and 52233 transitions. [2023-04-02 06:54:52,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-04-02 06:54:52,363 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:54:52,363 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2023-04-02 06:54:52,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-04-02 06:54:52,363 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:54:52,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:54:52,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1377361306, now seen corresponding path program 1 times [2023-04-02 06:54:52,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:54:52,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418422268] [2023-04-02 06:54:52,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:54:52,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:54:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:54:52,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:54:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:54:52,748 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 72 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 06:54:52,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:54:52,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418422268] [2023-04-02 06:54:52,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418422268] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:54:52,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625602692] [2023-04-02 06:54:52,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:54:52,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:54:52,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:54:52,757 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 06:54:52,764 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 06:54:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:54:52,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 06:54:52,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:54:53,109 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-04-02 06:54:53,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 06:54:53,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625602692] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:54:53,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 06:54:53,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-04-02 06:54:53,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112249170] [2023-04-02 06:54:53,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:54:53,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:54:53,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:54:53,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:54:53,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:54:53,111 INFO L87 Difference]: Start difference. First operand 36675 states and 52233 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2023-04-02 06:55:05,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:55:05,838 INFO L93 Difference]: Finished difference Result 106931 states and 151779 transitions. [2023-04-02 06:55:05,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:55:05,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) Word has length 169 [2023-04-02 06:55:05,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:55:05,988 INFO L225 Difference]: With dead ends: 106931 [2023-04-02 06:55:05,988 INFO L226 Difference]: Without dead ends: 70275 [2023-04-02 06:55:06,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:55:06,037 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 427 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 06:55:06,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 493 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 06:55:06,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70275 states. [2023-04-02 06:55:18,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70275 to 70273. [2023-04-02 06:55:18,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70273 states, 70269 states have (on average 1.401357639926568) internal successors, (98472), 70269 states have internal predecessors, (98472), 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 06:55:18,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70273 states to 70273 states and 98475 transitions. [2023-04-02 06:55:18,433 INFO L78 Accepts]: Start accepts. Automaton has 70273 states and 98475 transitions. Word has length 169 [2023-04-02 06:55:18,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:55:18,434 INFO L495 AbstractCegarLoop]: Abstraction has 70273 states and 98475 transitions. [2023-04-02 06:55:18,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2023-04-02 06:55:18,434 INFO L276 IsEmpty]: Start isEmpty. Operand 70273 states and 98475 transitions. [2023-04-02 06:55:18,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-02 06:55:18,441 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:55:18,441 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2023-04-02 06:55:18,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 06:55:18,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-04-02 06:55:18,648 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:55:18,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:55:18,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1566682693, now seen corresponding path program 1 times [2023-04-02 06:55:18,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:55:18,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694041981] [2023-04-02 06:55:18,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:55:18,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:55:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:55:18,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:55:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:55:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-04-02 06:55:18,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:55:18,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694041981] [2023-04-02 06:55:18,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694041981] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:55:18,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:55:18,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:55:18,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438199463] [2023-04-02 06:55:18,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:55:18,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:55:18,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:55:18,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:55:18,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:55:18,916 INFO L87 Difference]: Start difference. First operand 70273 states and 98475 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 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 06:55:44,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:55:44,271 INFO L93 Difference]: Finished difference Result 210359 states and 294849 transitions. [2023-04-02 06:55:44,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:55:44,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 3 states have internal predecessors, (105), 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 170 [2023-04-02 06:55:44,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:55:44,597 INFO L225 Difference]: With dead ends: 210359 [2023-04-02 06:55:44,597 INFO L226 Difference]: Without dead ends: 140380 [2023-04-02 06:55:44,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:55:44,682 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 187 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:55:44,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 423 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:55:44,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140380 states.