/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 06:17:23,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 06:17:23,507 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 06:17:23,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 06:17:23,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 06:17:23,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 06:17:23,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 06:17:23,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 06:17:23,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 06:17:23,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 06:17:23,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 06:17:23,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 06:17:23,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 06:17:23,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 06:17:23,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 06:17:23,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 06:17:23,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 06:17:23,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 06:17:23,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 06:17:23,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 06:17:23,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 06:17:23,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 06:17:23,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 06:17:23,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 06:17:23,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 06:17:23,585 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 06:17:23,585 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 06:17:23,586 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 06:17:23,587 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 06:17:23,587 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 06:17:23,588 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 06:17:23,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 06:17:23,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 06:17:23,591 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 06:17:23,591 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 06:17:23,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 06:17:23,592 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 06:17:23,592 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 06:17:23,592 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 06:17:23,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 06:17:23,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 06:17:23,595 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 06:17:23,630 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 06:17:23,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 06:17:23,631 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 06:17:23,631 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 06:17:23,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 06:17:23,632 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 06:17:23,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 06:17:23,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 06:17:23,633 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 06:17:23,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 06:17:23,634 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 06:17:23,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 06:17:23,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 06:17:23,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 06:17:23,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 06:17:23,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 06:17:23,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 06:17:23,634 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 06:17:23,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 06:17:23,635 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 06:17:23,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 06:17:23,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 06:17:23,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 06:17:23,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 06:17:23,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:17:23,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 06:17:23,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 06:17:23,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 06:17:23,636 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 06:17:23,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 06:17:23,636 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 06:17:23,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 06:17:23,637 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 06:17:23,637 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 06:17:23,637 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 06:17:23,637 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 06:17:23,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 06:17:23,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 06:17:23,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 06:17:23,883 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 06:17:23,884 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 06:17:23,885 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:17:25,167 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 06:17:25,419 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 06:17:25,419 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:17:25,430 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e024ed75/898c60ba8aa54589a06f5203c97e4aa7/FLAG526656d1e [2023-04-02 06:17:25,445 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e024ed75/898c60ba8aa54589a06f5203c97e4aa7 [2023-04-02 06:17:25,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 06:17:25,449 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 06:17:25,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 06:17:25,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 06:17:25,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 06:17:25,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:17:25" (1/1) ... [2023-04-02 06:17:25,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60ce483d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:25, skipping insertion in model container [2023-04-02 06:17:25,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:17:25" (1/1) ... [2023-04-02 06:17:25,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 06:17:25,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 06:17:25,665 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6356,6369] [2023-04-02 06:17:25,695 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:17:25,710 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 06:17:25,760 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6356,6369] [2023-04-02 06:17:25,783 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:17:25,810 INFO L208 MainTranslator]: Completed translation [2023-04-02 06:17:25,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:25 WrapperNode [2023-04-02 06:17:25,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 06:17:25,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 06:17:25,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 06:17:25,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 06:17:25,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:25" (1/1) ... [2023-04-02 06:17:25,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:25" (1/1) ... [2023-04-02 06:17:25,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:25" (1/1) ... [2023-04-02 06:17:25,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:25" (1/1) ... [2023-04-02 06:17:25,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:25" (1/1) ... [2023-04-02 06:17:25,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:25" (1/1) ... [2023-04-02 06:17:25,880 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:25" (1/1) ... [2023-04-02 06:17:25,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:25" (1/1) ... [2023-04-02 06:17:25,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 06:17:25,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 06:17:25,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 06:17:25,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 06:17:25,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:25" (1/1) ... [2023-04-02 06:17:25,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:17:25,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:17:25,926 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 06:17:25,935 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 06:17:25,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 06:17:25,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 06:17:25,968 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 06:17:25,968 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 06:17:25,968 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 06:17:25,968 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 06:17:25,968 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 06:17:25,968 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 06:17:25,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 06:17:25,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 06:17:25,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 06:17:25,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-02 06:17:25,969 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 06:17:25,969 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 06:17:25,969 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 06:17:25,970 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 06:17:25,970 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 06:17:25,970 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 06:17:25,970 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 06:17:25,970 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-02 06:17:25,970 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-02 06:17:25,970 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 06:17:25,970 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 06:17:25,970 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 06:17:25,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 06:17:25,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 06:17:25,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 06:17:25,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 06:17:25,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 06:17:25,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 06:17:26,134 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 06:17:26,135 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 06:17:26,646 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 06:17:26,655 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 06:17:26,655 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 06:17:26,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:17:26 BoogieIcfgContainer [2023-04-02 06:17:26,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 06:17:26,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 06:17:26,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 06:17:26,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 06:17:26,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 06:17:25" (1/3) ... [2023-04-02 06:17:26,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@111f32bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:17:26, skipping insertion in model container [2023-04-02 06:17:26,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:17:25" (2/3) ... [2023-04-02 06:17:26,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@111f32bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:17:26, skipping insertion in model container [2023-04-02 06:17:26,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:17:26" (3/3) ... [2023-04-02 06:17:26,670 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:17:26,687 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 06:17:26,688 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 06:17:26,740 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 06:17:26,746 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;@32164feb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 06:17:26,746 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 06:17:26,750 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 137 states have (on average 1.686131386861314) internal successors, (231), 138 states have internal predecessors, (231), 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 06:17:26,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-02 06:17:26,758 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:17:26,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:17:26,759 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:17:26,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:17:26,763 INFO L85 PathProgramCache]: Analyzing trace with hash 870163506, now seen corresponding path program 1 times [2023-04-02 06:17:26,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:17:26,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894465475] [2023-04-02 06:17:26,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:17:26,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:17:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:27,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:17:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:17:27,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:17:27,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894465475] [2023-04-02 06:17:27,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894465475] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:17:27,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:17:27,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:17:27,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435634483] [2023-04-02 06:17:27,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:17:27,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:17:27,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:17:27,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:17:27,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:17:27,543 INFO L87 Difference]: Start difference. First operand has 143 states, 137 states have (on average 1.686131386861314) internal successors, (231), 138 states have internal predecessors, (231), 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 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:28,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:17:28,513 INFO L93 Difference]: Finished difference Result 335 states and 535 transitions. [2023-04-02 06:17:28,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:17:28,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2023-04-02 06:17:28,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:17:28,525 INFO L225 Difference]: With dead ends: 335 [2023-04-02 06:17:28,525 INFO L226 Difference]: Without dead ends: 223 [2023-04-02 06:17:28,528 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 06:17:28,531 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 171 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:17:28,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 497 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:17:28,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-04-02 06:17:28,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2023-04-02 06:17:28,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 217 states have (on average 1.5023041474654377) internal successors, (326), 217 states have internal predecessors, (326), 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 06:17:28,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 329 transitions. [2023-04-02 06:17:28,598 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 329 transitions. Word has length 65 [2023-04-02 06:17:28,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:17:28,599 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 329 transitions. [2023-04-02 06:17:28,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:28,599 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 329 transitions. [2023-04-02 06:17:28,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-02 06:17:28,601 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:17:28,602 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 06:17:28,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 06:17:28,602 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:17:28,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:17:28,603 INFO L85 PathProgramCache]: Analyzing trace with hash 296648168, now seen corresponding path program 1 times [2023-04-02 06:17:28,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:17:28,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888543946] [2023-04-02 06:17:28,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:17:28,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:17:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:28,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:17:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:28,904 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 06:17:28,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:17:28,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888543946] [2023-04-02 06:17:28,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888543946] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:17:28,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:17:28,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:17:28,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168888341] [2023-04-02 06:17:28,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:17:28,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:17:28,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:17:28,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:17:28,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:17:28,908 INFO L87 Difference]: Start difference. First operand 221 states and 329 transitions. 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 06:17:29,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:17:29,569 INFO L93 Difference]: Finished difference Result 553 states and 857 transitions. [2023-04-02 06:17:29,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:17:29,570 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 06:17:29,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:17:29,573 INFO L225 Difference]: With dead ends: 553 [2023-04-02 06:17:29,573 INFO L226 Difference]: Without dead ends: 371 [2023-04-02 06:17:29,574 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 06:17:29,575 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 140 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:17:29,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 428 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:17:29,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2023-04-02 06:17:29,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 369. [2023-04-02 06:17:29,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 365 states have (on average 1.536986301369863) internal successors, (561), 365 states have internal predecessors, (561), 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 06:17:29,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 564 transitions. [2023-04-02 06:17:29,612 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 564 transitions. Word has length 66 [2023-04-02 06:17:29,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:17:29,613 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 564 transitions. [2023-04-02 06:17:29,613 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 06:17:29,613 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 564 transitions. [2023-04-02 06:17:29,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-02 06:17:29,615 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:17:29,615 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:17:29,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 06:17:29,615 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:17:29,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:17:29,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1606649977, now seen corresponding path program 1 times [2023-04-02 06:17:29,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:17:29,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87154080] [2023-04-02 06:17:29,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:17:29,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:17:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:29,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:17:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:29,827 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 06:17:29,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:17:29,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87154080] [2023-04-02 06:17:29,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87154080] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:17:29,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:17:29,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:17:29,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437476782] [2023-04-02 06:17:29,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:17:29,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:17:29,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:17:29,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:17:29,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:17:29,830 INFO L87 Difference]: Start difference. First operand 369 states and 564 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:30,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:17:30,459 INFO L93 Difference]: Finished difference Result 965 states and 1510 transitions. [2023-04-02 06:17:30,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:17:30,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2023-04-02 06:17:30,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:17:30,463 INFO L225 Difference]: With dead ends: 965 [2023-04-02 06:17:30,463 INFO L226 Difference]: Without dead ends: 635 [2023-04-02 06:17:30,464 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 06:17:30,465 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 135 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:17:30,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 413 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:17:30,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2023-04-02 06:17:30,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 633. [2023-04-02 06:17:30,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 629 states have (on average 1.5532591414944357) internal successors, (977), 629 states have internal predecessors, (977), 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 06:17:30,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 980 transitions. [2023-04-02 06:17:30,520 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 980 transitions. Word has length 67 [2023-04-02 06:17:30,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:17:30,520 INFO L495 AbstractCegarLoop]: Abstraction has 633 states and 980 transitions. [2023-04-02 06:17:30,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:17:30,520 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 980 transitions. [2023-04-02 06:17:30,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 06:17:30,522 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:17:30,522 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 06:17:30,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 06:17:30,522 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:17:30,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:17:30,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1100029497, now seen corresponding path program 1 times [2023-04-02 06:17:30,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:17:30,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826296319] [2023-04-02 06:17:30,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:17:30,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:17:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:30,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:17:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:30,737 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 06:17:30,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:17:30,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826296319] [2023-04-02 06:17:30,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826296319] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:17:30,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:17:30,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:17:30,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561605330] [2023-04-02 06:17:30,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:17:30,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:17:30,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:17:30,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:17:30,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:17:30,740 INFO L87 Difference]: Start difference. First operand 633 states and 980 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 06:17:31,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:17:31,368 INFO L93 Difference]: Finished difference Result 1693 states and 2654 transitions. [2023-04-02 06:17:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:17:31,369 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 06:17:31,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:17:31,374 INFO L225 Difference]: With dead ends: 1693 [2023-04-02 06:17:31,374 INFO L226 Difference]: Without dead ends: 1099 [2023-04-02 06:17:31,376 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 06:17:31,384 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 130 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:17:31,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 398 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:17:31,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2023-04-02 06:17:31,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 1097. [2023-04-02 06:17:31,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 1093 states have (on average 1.556267154620311) internal successors, (1701), 1093 states have internal predecessors, (1701), 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 06:17:31,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1704 transitions. [2023-04-02 06:17:31,480 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1704 transitions. Word has length 68 [2023-04-02 06:17:31,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:17:31,482 INFO L495 AbstractCegarLoop]: Abstraction has 1097 states and 1704 transitions. [2023-04-02 06:17:31,482 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 06:17:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1704 transitions. [2023-04-02 06:17:31,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-02 06:17:31,483 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:17:31,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:17:31,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 06:17:31,484 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:17:31,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:17:31,485 INFO L85 PathProgramCache]: Analyzing trace with hash 910675184, now seen corresponding path program 1 times [2023-04-02 06:17:31,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:17:31,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737255314] [2023-04-02 06:17:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:17:31,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:17:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:31,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:17:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:31,815 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 06:17:31,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:17:31,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737255314] [2023-04-02 06:17:31,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737255314] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:17:31,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:17:31,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 06:17:31,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827867283] [2023-04-02 06:17:31,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:17:31,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:17:31,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:17:31,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:17:31,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:17:31,828 INFO L87 Difference]: Start difference. First operand 1097 states and 1704 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 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 06:17:33,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:17:33,041 INFO L93 Difference]: Finished difference Result 7445 states and 11694 transitions. [2023-04-02 06:17:33,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 06:17:33,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 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 69 [2023-04-02 06:17:33,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:17:33,071 INFO L225 Difference]: With dead ends: 7445 [2023-04-02 06:17:33,071 INFO L226 Difference]: Without dead ends: 6387 [2023-04-02 06:17:33,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-04-02 06:17:33,080 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 1482 mSDsluCounter, 2155 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1482 SdHoareTripleChecker+Valid, 2349 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:17:33,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1482 Valid, 2349 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:17:33,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6387 states. [2023-04-02 06:17:33,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6387 to 2153. [2023-04-02 06:17:33,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2149 states have (on average 1.5509539320614238) internal successors, (3333), 2149 states have internal predecessors, (3333), 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 06:17:33,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 3336 transitions. [2023-04-02 06:17:33,457 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 3336 transitions. Word has length 69 [2023-04-02 06:17:33,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:17:33,458 INFO L495 AbstractCegarLoop]: Abstraction has 2153 states and 3336 transitions. [2023-04-02 06:17:33,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 7 states have internal predecessors, (66), 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 06:17:33,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 3336 transitions. [2023-04-02 06:17:33,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 06:17:33,461 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:17:33,461 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 06:17:33,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 06:17:33,461 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:17:33,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:17:33,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1852373084, now seen corresponding path program 1 times [2023-04-02 06:17:33,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:17:33,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492024999] [2023-04-02 06:17:33,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:17:33,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:17:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:33,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:17:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:33,814 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 06:17:33,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:17:33,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492024999] [2023-04-02 06:17:33,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492024999] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:17:33,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:17:33,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 06:17:33,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598722635] [2023-04-02 06:17:33,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:17:33,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:17:33,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:17:33,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:17:33,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:17:33,817 INFO L87 Difference]: Start difference. First operand 2153 states and 3336 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 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 06:17:36,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:17:36,338 INFO L93 Difference]: Finished difference Result 11283 states and 17453 transitions. [2023-04-02 06:17:36,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 06:17:36,339 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 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 06:17:36,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:17:36,377 INFO L225 Difference]: With dead ends: 11283 [2023-04-02 06:17:36,378 INFO L226 Difference]: Without dead ends: 9169 [2023-04-02 06:17:36,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:17:36,385 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 656 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 06:17:36,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 1331 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 06:17:36,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9169 states. [2023-04-02 06:17:37,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9169 to 9161. [2023-04-02 06:17:37,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9161 states, 9157 states have (on average 1.5416621164136726) internal successors, (14117), 9157 states have internal predecessors, (14117), 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 06:17:37,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9161 states to 9161 states and 14120 transitions. [2023-04-02 06:17:37,708 INFO L78 Accepts]: Start accepts. Automaton has 9161 states and 14120 transitions. Word has length 70 [2023-04-02 06:17:37,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:17:37,709 INFO L495 AbstractCegarLoop]: Abstraction has 9161 states and 14120 transitions. [2023-04-02 06:17:37,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 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 06:17:37,709 INFO L276 IsEmpty]: Start isEmpty. Operand 9161 states and 14120 transitions. [2023-04-02 06:17:37,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-02 06:17:37,711 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:17:37,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:17:37,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 06:17:37,711 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:17:37,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:17:37,712 INFO L85 PathProgramCache]: Analyzing trace with hash 2065968591, now seen corresponding path program 1 times [2023-04-02 06:17:37,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:17:37,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443133807] [2023-04-02 06:17:37,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:17:37,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:17:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:37,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:17:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:37,935 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 06:17:37,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:17:37,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443133807] [2023-04-02 06:17:37,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443133807] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:17:37,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:17:37,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:17:37,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958497597] [2023-04-02 06:17:37,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:17:37,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:17:37,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:17:37,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:17:37,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:17:37,938 INFO L87 Difference]: Start difference. First operand 9161 states and 14120 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 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 06:17:40,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:17:40,445 INFO L93 Difference]: Finished difference Result 24685 states and 37898 transitions. [2023-04-02 06:17:40,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:17:40,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 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 71 [2023-04-02 06:17:40,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:17:40,517 INFO L225 Difference]: With dead ends: 24685 [2023-04-02 06:17:40,518 INFO L226 Difference]: Without dead ends: 15563 [2023-04-02 06:17:40,542 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 06:17:40,544 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 147 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:17:40,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 468 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:17:40,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15563 states. [2023-04-02 06:17:42,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15563 to 15561. [2023-04-02 06:17:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15561 states, 15557 states have (on average 1.520408819181076) internal successors, (23653), 15557 states have internal predecessors, (23653), 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 06:17:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15561 states to 15561 states and 23656 transitions. [2023-04-02 06:17:42,640 INFO L78 Accepts]: Start accepts. Automaton has 15561 states and 23656 transitions. Word has length 71 [2023-04-02 06:17:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:17:42,641 INFO L495 AbstractCegarLoop]: Abstraction has 15561 states and 23656 transitions. [2023-04-02 06:17:42,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 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 06:17:42,641 INFO L276 IsEmpty]: Start isEmpty. Operand 15561 states and 23656 transitions. [2023-04-02 06:17:42,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-02 06:17:42,642 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:17:42,642 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 06:17:42,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 06:17:42,642 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:17:42,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:17:42,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1068997843, now seen corresponding path program 1 times [2023-04-02 06:17:42,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:17:42,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66815745] [2023-04-02 06:17:42,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:17:42,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:17:42,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:42,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:17:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:42,902 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 06:17:42,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:17:42,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66815745] [2023-04-02 06:17:42,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66815745] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:17:42,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:17:42,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:17:42,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333482170] [2023-04-02 06:17:42,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:17:42,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:17:42,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:17:42,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:17:42,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:17:42,904 INFO L87 Difference]: Start difference. First operand 15561 states and 23656 transitions. Second operand has 6 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 06:17:46,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:17:46,884 INFO L93 Difference]: Finished difference Result 43885 states and 66794 transitions. [2023-04-02 06:17:46,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:17:46,885 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2023-04-02 06:17:46,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:17:46,967 INFO L225 Difference]: With dead ends: 43885 [2023-04-02 06:17:46,967 INFO L226 Difference]: Without dead ends: 28363 [2023-04-02 06:17:47,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:17:47,004 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 846 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:17:47,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 224 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:17:47,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28363 states. [2023-04-02 06:17:50,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28363 to 28361. [2023-04-02 06:17:50,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28361 states, 28357 states have (on average 1.5123249991183834) internal successors, (42885), 28357 states have internal predecessors, (42885), 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 06:17:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28361 states to 28361 states and 42888 transitions. [2023-04-02 06:17:50,374 INFO L78 Accepts]: Start accepts. Automaton has 28361 states and 42888 transitions. Word has length 72 [2023-04-02 06:17:50,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:17:50,375 INFO L495 AbstractCegarLoop]: Abstraction has 28361 states and 42888 transitions. [2023-04-02 06:17:50,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 06:17:50,376 INFO L276 IsEmpty]: Start isEmpty. Operand 28361 states and 42888 transitions. [2023-04-02 06:17:50,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-02 06:17:50,377 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:17:50,377 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 06:17:50,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 06:17:50,377 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:17:50,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:17:50,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1829013522, now seen corresponding path program 1 times [2023-04-02 06:17:50,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:17:50,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297427030] [2023-04-02 06:17:50,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:17:50,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:17:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:50,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:17:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:17:50,837 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 06:17:50,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:17:50,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297427030] [2023-04-02 06:17:50,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297427030] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:17:50,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:17:50,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:17:50,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225353341] [2023-04-02 06:17:50,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:17:50,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:17:50,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:17:50,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:17:50,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:17:50,839 INFO L87 Difference]: Start difference. First operand 28361 states and 42888 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 06:17:57,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:17:57,959 INFO L93 Difference]: Finished difference Result 57835 states and 86889 transitions. [2023-04-02 06:17:57,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:17:57,960 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 06:17:57,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:17:58,144 INFO L225 Difference]: With dead ends: 57835 [2023-04-02 06:17:58,145 INFO L226 Difference]: Without dead ends: 57833 [2023-04-02 06:17:58,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:17:58,176 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 306 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:17:58,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 966 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:17:58,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57833 states. [2023-04-02 06:18:02,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57833 to 29513. [2023-04-02 06:18:02,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29513 states, 29509 states have (on average 1.4923243756142195) internal successors, (44037), 29509 states have internal predecessors, (44037), 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 06:18:02,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29513 states to 29513 states and 44040 transitions. [2023-04-02 06:18:02,844 INFO L78 Accepts]: Start accepts. Automaton has 29513 states and 44040 transitions. Word has length 72 [2023-04-02 06:18:02,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:18:02,845 INFO L495 AbstractCegarLoop]: Abstraction has 29513 states and 44040 transitions. [2023-04-02 06:18:02,845 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 06:18:02,845 INFO L276 IsEmpty]: Start isEmpty. Operand 29513 states and 44040 transitions. [2023-04-02 06:18:02,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 06:18:02,846 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:18:02,846 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 06:18:02,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 06:18:02,846 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:18:02,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:18:02,846 INFO L85 PathProgramCache]: Analyzing trace with hash 874464113, now seen corresponding path program 1 times [2023-04-02 06:18:02,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:18:02,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904399301] [2023-04-02 06:18:02,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:18:02,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:18:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:18:03,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:18:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:18:03,074 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 06:18:03,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:18:03,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904399301] [2023-04-02 06:18:03,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904399301] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:18:03,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:18:03,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:18:03,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381116473] [2023-04-02 06:18:03,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:18:03,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:18:03,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:18:03,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:18:03,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:18:03,076 INFO L87 Difference]: Start difference. First operand 29513 states and 44040 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 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 06:18:08,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:18:08,317 INFO L93 Difference]: Finished difference Result 66591 states and 99180 transitions. [2023-04-02 06:18:08,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:18:08,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 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 06:18:08,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:18:08,396 INFO L225 Difference]: With dead ends: 66591 [2023-04-02 06:18:08,397 INFO L226 Difference]: Without dead ends: 37117 [2023-04-02 06:18:08,453 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 06:18:08,454 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 117 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:18:08,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 349 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:18:08,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37117 states. [2023-04-02 06:18:13,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37117 to 36971. [2023-04-02 06:18:13,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36971 states, 36967 states have (on average 1.4808613087348175) internal successors, (54743), 36967 states have internal predecessors, (54743), 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 06:18:13,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36971 states to 36971 states and 54746 transitions. [2023-04-02 06:18:13,709 INFO L78 Accepts]: Start accepts. Automaton has 36971 states and 54746 transitions. Word has length 73 [2023-04-02 06:18:13,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:18:13,710 INFO L495 AbstractCegarLoop]: Abstraction has 36971 states and 54746 transitions. [2023-04-02 06:18:13,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 3 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 06:18:13,710 INFO L276 IsEmpty]: Start isEmpty. Operand 36971 states and 54746 transitions. [2023-04-02 06:18:13,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-02 06:18:13,727 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:18:13,728 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:18:13,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 06:18:13,728 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:18:13,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:18:13,729 INFO L85 PathProgramCache]: Analyzing trace with hash 251687175, now seen corresponding path program 1 times [2023-04-02 06:18:13,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:18:13,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387435550] [2023-04-02 06:18:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:18:13,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:18:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:18:13,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:18:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:18:13,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:18:13,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:18:13,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387435550] [2023-04-02 06:18:13,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387435550] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:18:13,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:18:13,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:18:13,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701263151] [2023-04-02 06:18:13,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:18:13,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:18:13,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:18:13,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:18:13,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:18:13,940 INFO L87 Difference]: Start difference. First operand 36971 states and 54746 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 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 06:18:23,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:18:23,611 INFO L93 Difference]: Finished difference Result 99824 states and 147998 transitions. [2023-04-02 06:18:23,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:18:23,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 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 100 [2023-04-02 06:18:23,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:18:23,748 INFO L225 Difference]: With dead ends: 99824 [2023-04-02 06:18:23,748 INFO L226 Difference]: Without dead ends: 66414 [2023-04-02 06:18:23,810 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 06:18:23,812 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 117 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:18:23,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 489 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:18:23,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66414 states. [2023-04-02 06:18:33,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66414 to 66412. [2023-04-02 06:18:33,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66412 states, 66408 states have (on average 1.4712835802915312) internal successors, (97705), 66408 states have internal predecessors, (97705), 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 06:18:33,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66412 states to 66412 states and 97708 transitions. [2023-04-02 06:18:33,656 INFO L78 Accepts]: Start accepts. Automaton has 66412 states and 97708 transitions. Word has length 100 [2023-04-02 06:18:33,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:18:33,656 INFO L495 AbstractCegarLoop]: Abstraction has 66412 states and 97708 transitions. [2023-04-02 06:18:33,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 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 06:18:33,657 INFO L276 IsEmpty]: Start isEmpty. Operand 66412 states and 97708 transitions. [2023-04-02 06:18:33,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-02 06:18:33,689 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:18:33,689 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 06:18:33,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 06:18:33,690 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:18:33,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:18:33,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1087790720, now seen corresponding path program 1 times [2023-04-02 06:18:33,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:18:33,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668541413] [2023-04-02 06:18:33,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:18:33,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:18:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:18:34,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:18:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:18:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:18:34,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:18:34,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668541413] [2023-04-02 06:18:34,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668541413] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:18:34,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249545940] [2023-04-02 06:18:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:18:34,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:18:34,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:18:34,481 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 06:18:34,483 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 06:18:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:18:34,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 06:18:34,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:18:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:18:35,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 06:18:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:18:35,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249545940] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 06:18:35,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 06:18:35,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 15 [2023-04-02 06:18:35,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354335941] [2023-04-02 06:18:35,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 06:18:35,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 06:18:35,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:18:35,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 06:18:35,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-04-02 06:18:35,217 INFO L87 Difference]: Start difference. First operand 66412 states and 97708 transitions. Second operand has 15 states, 15 states have (on average 18.533333333333335) internal successors, (278), 14 states have internal predecessors, (278), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2)