/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.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 06:01:52,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 06:01:52,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 06:01:52,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 06:01:52,741 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 06:01:52,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 06:01:52,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 06:01:52,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 06:01:52,750 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 06:01:52,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 06:01:52,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 06:01:52,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 06:01:52,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 06:01:52,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 06:01:52,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 06:01:52,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 06:01:52,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 06:01:52,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 06:01:52,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 06:01:52,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 06:01:52,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 06:01:52,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 06:01:52,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 06:01:52,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 06:01:52,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 06:01:52,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 06:01:52,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 06:01:52,788 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 06:01:52,788 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 06:01:52,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 06:01:52,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 06:01:52,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 06:01:52,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 06:01:52,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 06:01:52,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 06:01:52,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 06:01:52,792 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 06:01:52,823 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 06:01:52,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 06:01:52,824 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 06:01:52,824 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 06:01:52,825 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 06:01:52,825 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 06:01:52,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 06:01:52,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 06:01:52,826 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 06:01:52,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 06:01:52,827 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 06:01:52,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 06:01:52,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 06:01:52,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 06:01:52,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 06:01:52,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 06:01:52,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 06:01:52,827 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 06:01:52,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 06:01:52,828 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 06:01:52,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 06:01:52,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 06:01:52,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 06:01:52,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 06:01:52,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:01:52,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 06:01:52,829 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 06:01:52,829 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 06:01:52,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 06:01:52,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 06:01:52,829 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 06:01:52,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 06:01:52,829 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 06:01:52,829 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 06:01:52,830 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 06:01:52,830 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 06:01:53,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 06:01:53,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 06:01:53,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 06:01:53,094 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 06:01:53,095 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 06:01:53,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:01:54,277 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 06:01:54,510 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 06:01:54,511 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:01:54,531 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8c7cd523/05a60ebacd6c4225aac437b8a366ea0d/FLAGf8af84d5e [2023-04-02 06:01:54,546 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8c7cd523/05a60ebacd6c4225aac437b8a366ea0d [2023-04-02 06:01:54,549 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 06:01:54,551 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 06:01:54,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 06:01:54,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 06:01:54,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 06:01:54,558 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:01:54" (1/1) ... [2023-04-02 06:01:54,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cdf5e6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:01:54, skipping insertion in model container [2023-04-02 06:01:54,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:01:54" (1/1) ... [2023-04-02 06:01:54,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 06:01:54,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 06:01:54,822 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.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4411,4424] [2023-04-02 06:01:54,855 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:01:54,867 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 06:01:54,896 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.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[4411,4424] [2023-04-02 06:01:54,907 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:01:54,928 INFO L208 MainTranslator]: Completed translation [2023-04-02 06:01:54,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:01:54 WrapperNode [2023-04-02 06:01:54,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 06:01:54,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 06:01:54,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 06:01:54,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 06:01:54,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:01:54" (1/1) ... [2023-04-02 06:01:54,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:01:54" (1/1) ... [2023-04-02 06:01:54,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:01:54" (1/1) ... [2023-04-02 06:01:54,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:01:54" (1/1) ... [2023-04-02 06:01:54,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:01:54" (1/1) ... [2023-04-02 06:01:54,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:01:54" (1/1) ... [2023-04-02 06:01:54,978 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:01:54" (1/1) ... [2023-04-02 06:01:54,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:01:54" (1/1) ... [2023-04-02 06:01:54,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 06:01:54,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 06:01:54,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 06:01:54,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 06:01:54,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:01:54" (1/1) ... [2023-04-02 06:01:54,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:01:55,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:01:55,014 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 06:01:55,025 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 06:01:55,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 06:01:55,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 06:01:55,057 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 06:01:55,057 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 06:01:55,057 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 06:01:55,057 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 06:01:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 06:01:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 06:01:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 06:01:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 06:01:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 06:01:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-02 06:01:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 06:01:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 06:01:55,058 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 06:01:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 06:01:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 06:01:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 06:01:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 06:01:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 06:01:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 06:01:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 06:01:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 06:01:55,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 06:01:55,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 06:01:55,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 06:01:55,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 06:01:55,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 06:01:55,149 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 06:01:55,151 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 06:01:55,605 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 06:01:55,612 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 06:01:55,613 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 06:01:55,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:01:55 BoogieIcfgContainer [2023-04-02 06:01:55,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 06:01:55,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 06:01:55,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 06:01:55,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 06:01:55,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 06:01:54" (1/3) ... [2023-04-02 06:01:55,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f633d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:01:55, skipping insertion in model container [2023-04-02 06:01:55,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:01:54" (2/3) ... [2023-04-02 06:01:55,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f633d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:01:55, skipping insertion in model container [2023-04-02 06:01:55,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:01:55" (3/3) ... [2023-04-02 06:01:55,626 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:01:55,643 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 06:01:55,644 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 06:01:55,701 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 06:01:55,706 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;@4a559b0f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 06:01:55,706 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 06:01:55,710 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 81 states have (on average 1.6666666666666667) internal successors, (135), 82 states have internal predecessors, (135), 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 06:01:55,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 06:01:55,718 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:01:55,718 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] [2023-04-02 06:01:55,719 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:01:55,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:01:55,722 INFO L85 PathProgramCache]: Analyzing trace with hash -82761979, now seen corresponding path program 1 times [2023-04-02 06:01:55,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:01:55,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217840465] [2023-04-02 06:01:55,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:01:55,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:01:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:01:56,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:01:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:01:56,262 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 06:01:56,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:01:56,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217840465] [2023-04-02 06:01:56,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217840465] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:01:56,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:01:56,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:01:56,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047208038] [2023-04-02 06:01:56,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:01:56,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:01:56,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:01:56,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:01:56,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:01:56,300 INFO L87 Difference]: Start difference. First operand has 87 states, 81 states have (on average 1.6666666666666667) internal successors, (135), 82 states have internal predecessors, (135), 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 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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 06:01:56,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:01:56,873 INFO L93 Difference]: Finished difference Result 197 states and 307 transitions. [2023-04-02 06:01:56,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:01:56,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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 41 [2023-04-02 06:01:56,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:01:56,885 INFO L225 Difference]: With dead ends: 197 [2023-04-02 06:01:56,885 INFO L226 Difference]: Without dead ends: 126 [2023-04-02 06:01:56,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:01:56,891 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 91 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:01:56,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 277 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:01:56,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-04-02 06:01:56,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2023-04-02 06:01:56,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 120 states have (on average 1.4916666666666667) internal successors, (179), 120 states have internal predecessors, (179), 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 06:01:56,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 182 transitions. [2023-04-02 06:01:56,975 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 182 transitions. Word has length 41 [2023-04-02 06:01:56,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:01:56,975 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 182 transitions. [2023-04-02 06:01:56,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 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 06:01:56,976 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 182 transitions. [2023-04-02 06:01:56,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-02 06:01:56,977 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:01:56,977 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] [2023-04-02 06:01:56,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 06:01:56,978 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:01:56,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:01:56,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1104141884, now seen corresponding path program 1 times [2023-04-02 06:01:56,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:01:56,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635380484] [2023-04-02 06:01:56,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:01:56,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:01:57,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:01:57,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:01:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:01:57,251 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 06:01:57,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:01:57,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635380484] [2023-04-02 06:01:57,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635380484] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:01:57,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:01:57,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:01:57,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150193648] [2023-04-02 06:01:57,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:01:57,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:01:57,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:01:57,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:01:57,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:01:57,255 INFO L87 Difference]: Start difference. First operand 124 states and 182 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 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 06:01:57,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:01:57,668 INFO L93 Difference]: Finished difference Result 292 states and 446 transitions. [2023-04-02 06:01:57,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:01:57,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 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 42 [2023-04-02 06:01:57,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:01:57,677 INFO L225 Difference]: With dead ends: 292 [2023-04-02 06:01:57,677 INFO L226 Difference]: Without dead ends: 192 [2023-04-02 06:01:57,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:01:57,683 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 75 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:01:57,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 223 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:01:57,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-04-02 06:01:57,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2023-04-02 06:01:57,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 186 states have (on average 1.5161290322580645) internal successors, (282), 186 states have internal predecessors, (282), 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 06:01:57,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 285 transitions. [2023-04-02 06:01:57,713 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 285 transitions. Word has length 42 [2023-04-02 06:01:57,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:01:57,714 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 285 transitions. [2023-04-02 06:01:57,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 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 06:01:57,714 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 285 transitions. [2023-04-02 06:01:57,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-02 06:01:57,715 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:01:57,715 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] [2023-04-02 06:01:57,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 06:01:57,716 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:01:57,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:01:57,717 INFO L85 PathProgramCache]: Analyzing trace with hash 783191118, now seen corresponding path program 1 times [2023-04-02 06:01:57,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:01:57,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155909812] [2023-04-02 06:01:57,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:01:57,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:01:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:01:57,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:01:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:01:57,912 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 06:01:57,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:01:57,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155909812] [2023-04-02 06:01:57,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155909812] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:01:57,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:01:57,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:01:57,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408078176] [2023-04-02 06:01:57,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:01:57,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:01:57,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:01:57,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:01:57,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:01:57,916 INFO L87 Difference]: Start difference. First operand 190 states and 285 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 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 06:01:58,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:01:58,301 INFO L93 Difference]: Finished difference Result 854 states and 1329 transitions. [2023-04-02 06:01:58,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:01:58,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 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 43 [2023-04-02 06:01:58,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:01:58,305 INFO L225 Difference]: With dead ends: 854 [2023-04-02 06:01:58,305 INFO L226 Difference]: Without dead ends: 688 [2023-04-02 06:01:58,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:01:58,307 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 465 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:01:58,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 626 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:01:58,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2023-04-02 06:01:58,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 354. [2023-04-02 06:01:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 350 states have (on average 1.5257142857142858) internal successors, (534), 350 states have internal predecessors, (534), 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 06:01:58,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 537 transitions. [2023-04-02 06:01:58,363 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 537 transitions. Word has length 43 [2023-04-02 06:01:58,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:01:58,363 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 537 transitions. [2023-04-02 06:01:58,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 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 06:01:58,364 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 537 transitions. [2023-04-02 06:01:58,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-02 06:01:58,365 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:01:58,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:01:58,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 06:01:58,365 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:01:58,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:01:58,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1509411903, now seen corresponding path program 1 times [2023-04-02 06:01:58,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:01:58,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276889214] [2023-04-02 06:01:58,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:01:58,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:01:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:01:58,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:01:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:01:58,569 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 06:01:58,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:01:58,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276889214] [2023-04-02 06:01:58,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276889214] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:01:58,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:01:58,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:01:58,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901734988] [2023-04-02 06:01:58,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:01:58,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:01:58,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:01:58,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:01:58,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:01:58,572 INFO L87 Difference]: Start difference. First operand 354 states and 537 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 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 06:01:59,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:01:59,070 INFO L93 Difference]: Finished difference Result 1232 states and 1892 transitions. [2023-04-02 06:01:59,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 06:01:59,071 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 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 44 [2023-04-02 06:01:59,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:01:59,077 INFO L225 Difference]: With dead ends: 1232 [2023-04-02 06:01:59,077 INFO L226 Difference]: Without dead ends: 902 [2023-04-02 06:01:59,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:01:59,089 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 273 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:01:59,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 357 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:01:59,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2023-04-02 06:01:59,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 898. [2023-04-02 06:01:59,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 894 states have (on average 1.5279642058165548) internal successors, (1366), 894 states have internal predecessors, (1366), 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 06:01:59,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1369 transitions. [2023-04-02 06:01:59,252 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1369 transitions. Word has length 44 [2023-04-02 06:01:59,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:01:59,253 INFO L495 AbstractCegarLoop]: Abstraction has 898 states and 1369 transitions. [2023-04-02 06:01:59,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 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 06:01:59,254 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1369 transitions. [2023-04-02 06:01:59,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 06:01:59,260 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:01:59,260 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] [2023-04-02 06:01:59,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 06:01:59,261 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:01:59,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:01:59,262 INFO L85 PathProgramCache]: Analyzing trace with hash 976226334, now seen corresponding path program 1 times [2023-04-02 06:01:59,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:01:59,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993140827] [2023-04-02 06:01:59,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:01:59,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:01:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:01:59,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:01:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:01:59,413 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 06:01:59,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:01:59,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993140827] [2023-04-02 06:01:59,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993140827] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:01:59,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:01:59,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:01:59,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128748378] [2023-04-02 06:01:59,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:01:59,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:01:59,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:01:59,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:01:59,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:01:59,425 INFO L87 Difference]: Start difference. First operand 898 states and 1369 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 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 06:02:00,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:02:00,019 INFO L93 Difference]: Finished difference Result 2334 states and 3555 transitions. [2023-04-02 06:02:00,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:02:00,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 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 46 [2023-04-02 06:02:00,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:02:00,026 INFO L225 Difference]: With dead ends: 2334 [2023-04-02 06:02:00,027 INFO L226 Difference]: Without dead ends: 1460 [2023-04-02 06:02:00,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:02:00,030 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 81 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:02:00,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 271 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:02:00,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2023-04-02 06:02:00,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1458. [2023-04-02 06:02:00,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1454 states have (on average 1.500687757909216) internal successors, (2182), 1454 states have internal predecessors, (2182), 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 06:02:00,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 2185 transitions. [2023-04-02 06:02:00,271 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 2185 transitions. Word has length 46 [2023-04-02 06:02:00,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:02:00,272 INFO L495 AbstractCegarLoop]: Abstraction has 1458 states and 2185 transitions. [2023-04-02 06:02:00,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 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 06:02:00,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 2185 transitions. [2023-04-02 06:02:00,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 06:02:00,274 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:02:00,275 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] [2023-04-02 06:02:00,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 06:02:00,275 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:02:00,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:02:00,276 INFO L85 PathProgramCache]: Analyzing trace with hash -279925224, now seen corresponding path program 1 times [2023-04-02 06:02:00,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:02:00,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266494410] [2023-04-02 06:02:00,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:02:00,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:02:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:02:00,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:02:00,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:02:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:02:00,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:02:00,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266494410] [2023-04-02 06:02:00,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266494410] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:02:00,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:02:00,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:02:00,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791593114] [2023-04-02 06:02:00,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:02:00,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:02:00,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:02:00,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:02:00,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:02:00,487 INFO L87 Difference]: Start difference. First operand 1458 states and 2185 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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 06:02:01,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:02:01,239 INFO L93 Difference]: Finished difference Result 4326 states and 6507 transitions. [2023-04-02 06:02:01,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:02:01,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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 46 [2023-04-02 06:02:01,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:02:01,252 INFO L225 Difference]: With dead ends: 4326 [2023-04-02 06:02:01,253 INFO L226 Difference]: Without dead ends: 2892 [2023-04-02 06:02:01,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:02:01,256 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 474 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:02:01,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 143 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:02:01,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2023-04-02 06:02:01,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2890. [2023-04-02 06:02:01,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2890 states, 2886 states have (on average 1.4934164934164935) internal successors, (4310), 2886 states have internal predecessors, (4310), 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 06:02:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 4313 transitions. [2023-04-02 06:02:01,730 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 4313 transitions. Word has length 46 [2023-04-02 06:02:01,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:02:01,732 INFO L495 AbstractCegarLoop]: Abstraction has 2890 states and 4313 transitions. [2023-04-02 06:02:01,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 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 06:02:01,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 4313 transitions. [2023-04-02 06:02:01,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-02 06:02:01,733 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:02:01,733 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] [2023-04-02 06:02:01,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 06:02:01,733 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:02:01,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:02:01,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1346239443, now seen corresponding path program 1 times [2023-04-02 06:02:01,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:02:01,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476561789] [2023-04-02 06:02:01,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:02:01,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:02:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:02:01,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:02:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:02:01,978 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 06:02:01,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:02:01,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476561789] [2023-04-02 06:02:01,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476561789] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:02:01,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:02:01,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:02:01,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779618088] [2023-04-02 06:02:01,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:02:01,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:02:01,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:02:01,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:02:01,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:02:01,980 INFO L87 Difference]: Start difference. First operand 2890 states and 4313 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 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 06:02:03,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:02:03,041 INFO L93 Difference]: Finished difference Result 5948 states and 8794 transitions. [2023-04-02 06:02:03,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:02:03,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 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 46 [2023-04-02 06:02:03,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:02:03,064 INFO L225 Difference]: With dead ends: 5948 [2023-04-02 06:02:03,065 INFO L226 Difference]: Without dead ends: 5946 [2023-04-02 06:02:03,066 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 06:02:03,067 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 174 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:02:03,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 550 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:02:03,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5946 states. [2023-04-02 06:02:03,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5946 to 3082. [2023-04-02 06:02:03,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3082 states, 3078 states have (on average 1.4626380766731644) internal successors, (4502), 3078 states have internal predecessors, (4502), 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 06:02:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 4505 transitions. [2023-04-02 06:02:03,610 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 4505 transitions. Word has length 46 [2023-04-02 06:02:03,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:02:03,610 INFO L495 AbstractCegarLoop]: Abstraction has 3082 states and 4505 transitions. [2023-04-02 06:02:03,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 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 06:02:03,611 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 4505 transitions. [2023-04-02 06:02:03,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 06:02:03,611 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:02:03,612 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] [2023-04-02 06:02:03,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 06:02:03,612 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:02:03,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:02:03,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1206630517, now seen corresponding path program 1 times [2023-04-02 06:02:03,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:02:03,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681676021] [2023-04-02 06:02:03,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:02:03,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:02:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:02:03,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:02:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:02:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:02:03,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:02:03,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681676021] [2023-04-02 06:02:03,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681676021] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:02:03,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:02:03,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:02:03,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265668899] [2023-04-02 06:02:03,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:02:03,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:02:03,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:02:03,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:02:03,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:02:03,761 INFO L87 Difference]: Start difference. First operand 3082 states and 4505 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 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 06:02:04,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:02:04,635 INFO L93 Difference]: Finished difference Result 7400 states and 10815 transitions. [2023-04-02 06:02:04,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:02:04,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 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 47 [2023-04-02 06:02:04,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:02:04,651 INFO L225 Difference]: With dead ends: 7400 [2023-04-02 06:02:04,651 INFO L226 Difference]: Without dead ends: 4342 [2023-04-02 06:02:04,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:02:04,657 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 64 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:02:04,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 202 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:02:04,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4342 states. [2023-04-02 06:02:05,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4342 to 4300. [2023-04-02 06:02:05,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4300 states, 4296 states have (on average 1.4455307262569832) internal successors, (6210), 4296 states have internal predecessors, (6210), 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 06:02:05,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4300 states to 4300 states and 6213 transitions. [2023-04-02 06:02:05,383 INFO L78 Accepts]: Start accepts. Automaton has 4300 states and 6213 transitions. Word has length 47 [2023-04-02 06:02:05,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:02:05,384 INFO L495 AbstractCegarLoop]: Abstraction has 4300 states and 6213 transitions. [2023-04-02 06:02:05,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 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 06:02:05,385 INFO L276 IsEmpty]: Start isEmpty. Operand 4300 states and 6213 transitions. [2023-04-02 06:02:05,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-02 06:02:05,387 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:02:05,387 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] [2023-04-02 06:02:05,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 06:02:05,387 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:02:05,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:02:05,388 INFO L85 PathProgramCache]: Analyzing trace with hash 2038886974, now seen corresponding path program 1 times [2023-04-02 06:02:05,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:02:05,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029266320] [2023-04-02 06:02:05,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:02:05,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:02:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:02:05,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:02:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:02:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 06:02:05,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:02:05,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029266320] [2023-04-02 06:02:05,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029266320] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:02:05,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:02:05,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:02:05,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534925608] [2023-04-02 06:02:05,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:02:05,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:02:05,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:02:05,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:02:05,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:02:05,591 INFO L87 Difference]: Start difference. First operand 4300 states and 6213 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 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 06:02:06,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:02:06,785 INFO L93 Difference]: Finished difference Result 7680 states and 11199 transitions. [2023-04-02 06:02:06,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:02:06,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 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 06:02:06,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:02:06,806 INFO L225 Difference]: With dead ends: 7680 [2023-04-02 06:02:06,807 INFO L226 Difference]: Without dead ends: 6126 [2023-04-02 06:02:06,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:02:06,811 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 327 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:02:06,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 532 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:02:06,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2023-04-02 06:02:07,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 5576. [2023-04-02 06:02:07,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5576 states, 5572 states have (on average 1.4447236180904524) internal successors, (8050), 5572 states have internal predecessors, (8050), 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 06:02:07,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5576 states to 5576 states and 8053 transitions. [2023-04-02 06:02:07,425 INFO L78 Accepts]: Start accepts. Automaton has 5576 states and 8053 transitions. Word has length 65 [2023-04-02 06:02:07,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:02:07,426 INFO L495 AbstractCegarLoop]: Abstraction has 5576 states and 8053 transitions. [2023-04-02 06:02:07,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 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 06:02:07,426 INFO L276 IsEmpty]: Start isEmpty. Operand 5576 states and 8053 transitions. [2023-04-02 06:02:07,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-02 06:02:07,435 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:02:07,435 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] [2023-04-02 06:02:07,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 06:02:07,436 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:02:07,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:02:07,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1552051143, now seen corresponding path program 1 times [2023-04-02 06:02:07,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:02:07,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753412158] [2023-04-02 06:02:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:02:07,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:02:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:02:07,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:02:07,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:02:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:02:07,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:02:07,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753412158] [2023-04-02 06:02:07,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753412158] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:02:07,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:02:07,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:02:07,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853451781] [2023-04-02 06:02:07,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:02:07,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:02:07,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:02:07,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:02:07,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:02:07,568 INFO L87 Difference]: Start difference. First operand 5576 states and 8053 transitions. 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 06:02:08,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:02:08,725 INFO L93 Difference]: Finished difference Result 9019 states and 12959 transitions. [2023-04-02 06:02:08,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:02:08,726 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 06:02:08,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:02:08,746 INFO L225 Difference]: With dead ends: 9019 [2023-04-02 06:02:08,746 INFO L226 Difference]: Without dead ends: 5866 [2023-04-02 06:02:08,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:02:08,754 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 65 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:02:08,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 247 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:02:08,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5866 states. [2023-04-02 06:02:09,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5866 to 5640. [2023-04-02 06:02:09,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5640 states, 5636 states have (on average 1.4174946770759405) internal successors, (7989), 5636 states have internal predecessors, (7989), 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 06:02:09,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5640 states to 5640 states and 7992 transitions. [2023-04-02 06:02:09,372 INFO L78 Accepts]: Start accepts. Automaton has 5640 states and 7992 transitions. Word has length 65 [2023-04-02 06:02:09,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:02:09,372 INFO L495 AbstractCegarLoop]: Abstraction has 5640 states and 7992 transitions. [2023-04-02 06:02:09,372 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 06:02:09,372 INFO L276 IsEmpty]: Start isEmpty. Operand 5640 states and 7992 transitions. [2023-04-02 06:02:09,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-02 06:02:09,375 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:02:09,375 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] [2023-04-02 06:02:09,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 06:02:09,375 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:02:09,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:02:09,376 INFO L85 PathProgramCache]: Analyzing trace with hash -395096693, now seen corresponding path program 1 times [2023-04-02 06:02:09,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:02:09,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448457419] [2023-04-02 06:02:09,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:02:09,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:02:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:02:09,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:02:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:02:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 06:02:09,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:02:09,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448457419] [2023-04-02 06:02:09,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448457419] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:02:09,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:02:09,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:02:09,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324192004] [2023-04-02 06:02:09,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:02:09,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:02:09,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:02:09,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:02:09,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:02:09,545 INFO L87 Difference]: Start difference. First operand 5640 states and 7992 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 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 06:02:10,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:02:10,597 INFO L93 Difference]: Finished difference Result 7823 states and 11183 transitions. [2023-04-02 06:02:10,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:02:10,598 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 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 06:02:10,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:02:10,610 INFO L225 Difference]: With dead ends: 7823 [2023-04-02 06:02:10,611 INFO L226 Difference]: Without dead ends: 7009 [2023-04-02 06:02:10,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:02:10,614 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 332 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:02:10,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 512 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:02:10,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7009 states. [2023-04-02 06:02:11,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7009 to 6436. [2023-04-02 06:02:11,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6436 states, 6432 states have (on average 1.4193097014925373) internal successors, (9129), 6432 states have internal predecessors, (9129), 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 06:02:11,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6436 states to 6436 states and 9132 transitions. [2023-04-02 06:02:11,411 INFO L78 Accepts]: Start accepts. Automaton has 6436 states and 9132 transitions. Word has length 65 [2023-04-02 06:02:11,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:02:11,411 INFO L495 AbstractCegarLoop]: Abstraction has 6436 states and 9132 transitions. [2023-04-02 06:02:11,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 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 06:02:11,411 INFO L276 IsEmpty]: Start isEmpty. Operand 6436 states and 9132 transitions. [2023-04-02 06:02:11,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-02 06:02:11,413 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:02:11,413 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:02:11,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 06:02:11,413 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:02:11,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:02:11,414 INFO L85 PathProgramCache]: Analyzing trace with hash 2017104914, now seen corresponding path program 1 times [2023-04-02 06:02:11,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:02:11,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475959455] [2023-04-02 06:02:11,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:02:11,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:02:11,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:02:11,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:02:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:02:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:02:11,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:02:11,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475959455] [2023-04-02 06:02:11,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475959455] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:02:11,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528867470] [2023-04-02 06:02:11,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:02:11,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:02:11,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:02:11,833 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 06:02:11,861 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 06:02:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:02:12,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-02 06:02:12,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:02:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:02:12,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 06:02:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:02:12,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528867470] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 06:02:12,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 06:02:12,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 15 [2023-04-02 06:02:12,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612167116] [2023-04-02 06:02:12,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 06:02:12,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 06:02:12,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:02:12,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 06:02:12,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-04-02 06:02:12,409 INFO L87 Difference]: Start difference. First operand 6436 states and 9132 transitions. Second operand has 15 states, 15 states have (on average 11.733333333333333) internal successors, (176), 14 states have internal predecessors, (176), 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) [2023-04-02 06:02:26,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:02:26,077 INFO L93 Difference]: Finished difference Result 62412 states and 87299 transitions. [2023-04-02 06:02:26,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-04-02 06:02:26,078 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 11.733333333333333) internal successors, (176), 14 states have internal predecessors, (176), 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) Word has length 66 [2023-04-02 06:02:26,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:02:26,267 INFO L225 Difference]: With dead ends: 62412 [2023-04-02 06:02:26,267 INFO L226 Difference]: Without dead ends: 56280 [2023-04-02 06:02:26,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6211 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2573, Invalid=12433, Unknown=0, NotChecked=0, Total=15006 [2023-04-02 06:02:26,306 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 6416 mSDsluCounter, 1732 mSDsCounter, 0 mSdLazyCounter, 2924 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6416 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 2990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:02:26,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6416 Valid, 2048 Invalid, 2990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2924 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-02 06:02:26,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56280 states. [2023-04-02 06:02:30,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56280 to 23738. [2023-04-02 06:02:30,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23738 states, 23734 states have (on average 1.3861548832897952) internal successors, (32899), 23734 states have internal predecessors, (32899), 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 06:02:30,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23738 states to 23738 states and 32902 transitions. [2023-04-02 06:02:30,898 INFO L78 Accepts]: Start accepts. Automaton has 23738 states and 32902 transitions. Word has length 66 [2023-04-02 06:02:30,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:02:30,899 INFO L495 AbstractCegarLoop]: Abstraction has 23738 states and 32902 transitions. [2023-04-02 06:02:30,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.733333333333333) internal successors, (176), 14 states have internal predecessors, (176), 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) [2023-04-02 06:02:30,899 INFO L276 IsEmpty]: Start isEmpty. Operand 23738 states and 32902 transitions. [2023-04-02 06:02:30,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-02 06:02:30,903 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:02:30,903 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:02:30,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 06:02:31,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 06:02:31,113 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:02:31,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:02:31,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1524203328, now seen corresponding path program 1 times [2023-04-02 06:02:31,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:02:31,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386620579] [2023-04-02 06:02:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:02:31,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:02:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:02:31,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:02:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:02:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:02:31,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:02:31,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386620579] [2023-04-02 06:02:31,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386620579] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:02:31,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:02:31,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:02:31,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507384299] [2023-04-02 06:02:31,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:02:31,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:02:31,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:02:31,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:02:31,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:02:31,256 INFO L87 Difference]: Start difference. First operand 23738 states and 32902 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 06:02:38,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:02:38,048 INFO L93 Difference]: Finished difference Result 62931 states and 86759 transitions. [2023-04-02 06:02:38,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:02:38,049 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 06:02:38,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:02:38,158 INFO L225 Difference]: With dead ends: 62931 [2023-04-02 06:02:38,158 INFO L226 Difference]: Without dead ends: 42206 [2023-04-02 06:02:38,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:02:38,209 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 60 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 06:02:38,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 227 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 06:02:38,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42206 states. [2023-04-02 06:02:44,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42206 to 42155. [2023-04-02 06:02:45,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42155 states, 42151 states have (on average 1.3608692557709188) internal successors, (57362), 42151 states have internal predecessors, (57362), 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 06:02:45,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42155 states to 42155 states and 57365 transitions. [2023-04-02 06:02:45,112 INFO L78 Accepts]: Start accepts. Automaton has 42155 states and 57365 transitions. Word has length 67 [2023-04-02 06:02:45,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:02:45,113 INFO L495 AbstractCegarLoop]: Abstraction has 42155 states and 57365 transitions. [2023-04-02 06:02:45,113 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 06:02:45,113 INFO L276 IsEmpty]: Start isEmpty. Operand 42155 states and 57365 transitions. [2023-04-02 06:02:45,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 06:02:45,118 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:02:45,118 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:02:45,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 06:02:45,119 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:02:45,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:02:45,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1253734082, now seen corresponding path program 1 times [2023-04-02 06:02:45,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:02:45,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118229248] [2023-04-02 06:02:45,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:02:45,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:02:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:02:45,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:02:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:02:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:02:45,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:02:45,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118229248] [2023-04-02 06:02:45,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118229248] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:02:45,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:02:45,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:02:45,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187108848] [2023-04-02 06:02:45,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:02:45,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:02:45,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:02:45,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:02:45,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:02:45,277 INFO L87 Difference]: Start difference. First operand 42155 states and 57365 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 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 06:02:54,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:02:54,663 INFO L93 Difference]: Finished difference Result 65764 states and 90228 transitions. [2023-04-02 06:02:54,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:02:54,664 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 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 68 [2023-04-02 06:02:54,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:02:54,823 INFO L225 Difference]: With dead ends: 65764 [2023-04-02 06:02:54,824 INFO L226 Difference]: Without dead ends: 55873 [2023-04-02 06:02:54,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:02:54,873 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 319 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:02:54,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 562 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:02:54,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55873 states. [2023-04-02 06:03:03,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55873 to 50967. [2023-04-02 06:03:03,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50967 states, 50963 states have (on average 1.357416164668485) internal successors, (69178), 50963 states have internal predecessors, (69178), 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 06:03:03,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50967 states to 50967 states and 69181 transitions. [2023-04-02 06:03:03,834 INFO L78 Accepts]: Start accepts. Automaton has 50967 states and 69181 transitions. Word has length 68 [2023-04-02 06:03:03,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:03:03,835 INFO L495 AbstractCegarLoop]: Abstraction has 50967 states and 69181 transitions. [2023-04-02 06:03:03,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 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 06:03:03,835 INFO L276 IsEmpty]: Start isEmpty. Operand 50967 states and 69181 transitions. [2023-04-02 06:03:03,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 06:03:03,842 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:03:03,842 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] [2023-04-02 06:03:03,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-02 06:03:03,842 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:03:03,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:03:03,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1922369851, now seen corresponding path program 1 times [2023-04-02 06:03:03,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:03:03,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824374265] [2023-04-02 06:03:03,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:03:03,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:03:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:03:03,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:03:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:03:03,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:03:03,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:03:03,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824374265] [2023-04-02 06:03:03,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824374265] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:03:03,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:03:03,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:03:03,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020922981] [2023-04-02 06:03:03,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:03:03,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:03:03,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:03:03,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:03:03,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:03:03,979 INFO L87 Difference]: Start difference. First operand 50967 states and 69181 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 06:03:14,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:03:14,751 INFO L93 Difference]: Finished difference Result 107658 states and 145662 transitions. [2023-04-02 06:03:14,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:03:14,752 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 06:03:14,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:03:14,871 INFO L225 Difference]: With dead ends: 107658 [2023-04-02 06:03:14,871 INFO L226 Difference]: Without dead ends: 58841 [2023-04-02 06:03:14,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:03:14,945 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 62 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:03:14,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 258 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:03:15,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58841 states. [2023-04-02 06:03:23,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58841 to 50009. [2023-04-02 06:03:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50009 states, 50005 states have (on average 1.3393860613938606) internal successors, (66976), 50005 states have internal predecessors, (66976), 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 06:03:24,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50009 states to 50009 states and 66979 transitions. [2023-04-02 06:03:24,012 INFO L78 Accepts]: Start accepts. Automaton has 50009 states and 66979 transitions. Word has length 68 [2023-04-02 06:03:24,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:03:24,012 INFO L495 AbstractCegarLoop]: Abstraction has 50009 states and 66979 transitions. [2023-04-02 06:03:24,013 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 06:03:24,013 INFO L276 IsEmpty]: Start isEmpty. Operand 50009 states and 66979 transitions. [2023-04-02 06:03:24,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 06:03:24,020 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:03:24,020 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] [2023-04-02 06:03:24,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-02 06:03:24,020 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:03:24,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:03:24,021 INFO L85 PathProgramCache]: Analyzing trace with hash 808331479, now seen corresponding path program 1 times [2023-04-02 06:03:24,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:03:24,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9118882] [2023-04-02 06:03:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:03:24,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:03:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:03:24,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:03:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:03:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:03:24,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:03:24,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9118882] [2023-04-02 06:03:24,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9118882] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:03:24,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468230677] [2023-04-02 06:03:24,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:03:24,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:03:24,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:03:24,227 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 06:03:24,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 06:03:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:03:24,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 06:03:24,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:03:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:03:24,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 06:03:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:03:24,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468230677] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 06:03:24,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 06:03:24,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-04-02 06:03:24,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348616964] [2023-04-02 06:03:24,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 06:03:24,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 06:03:24,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:03:24,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 06:03:24,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-04-02 06:03:24,689 INFO L87 Difference]: Start difference. First operand 50009 states and 66979 transitions. Second operand has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 10 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:03:41,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:03:41,918 INFO L93 Difference]: Finished difference Result 115609 states and 154891 transitions. [2023-04-02 06:03:41,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 06:03:41,919 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 10 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2023-04-02 06:03:41,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:03:42,104 INFO L225 Difference]: With dead ends: 115609 [2023-04-02 06:03:42,104 INFO L226 Difference]: Without dead ends: 84419 [2023-04-02 06:03:42,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2023-04-02 06:03:42,165 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 1904 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1904 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:03:42,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1904 Valid, 332 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:03:42,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84419 states. [2023-04-02 06:03:52,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84419 to 50985. [2023-04-02 06:03:52,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50985 states, 50981 states have (on average 1.348580843843785) internal successors, (68752), 50981 states have internal predecessors, (68752), 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 06:03:52,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50985 states to 50985 states and 68755 transitions. [2023-04-02 06:03:52,949 INFO L78 Accepts]: Start accepts. Automaton has 50985 states and 68755 transitions. Word has length 70 [2023-04-02 06:03:52,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:03:52,949 INFO L495 AbstractCegarLoop]: Abstraction has 50985 states and 68755 transitions. [2023-04-02 06:03:52,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.416666666666666) internal successors, (113), 10 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:03:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 50985 states and 68755 transitions. [2023-04-02 06:03:52,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 06:03:52,959 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:03:52,959 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 06:03:52,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 06:03:53,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-02 06:03:53,168 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:03:53,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:03:53,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1873998691, now seen corresponding path program 1 times [2023-04-02 06:03:53,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:03:53,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127601891] [2023-04-02 06:03:53,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:03:53,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:03:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:03:53,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:03:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:03:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:03:53,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:03:53,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127601891] [2023-04-02 06:03:53,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127601891] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:03:53,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:03:53,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:03:53,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418884621] [2023-04-02 06:03:53,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:03:53,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:03:53,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:03:53,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:03:53,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:03:53,315 INFO L87 Difference]: Start difference. First operand 50985 states and 68755 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 06:04:01,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:04:01,017 INFO L93 Difference]: Finished difference Result 57234 states and 76701 transitions. [2023-04-02 06:04:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:04:01,018 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 06:04:01,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:04:01,069 INFO L225 Difference]: With dead ends: 57234 [2023-04-02 06:04:01,069 INFO L226 Difference]: Without dead ends: 36399 [2023-04-02 06:04:01,094 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 06:04:01,094 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 64 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:04:01,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 284 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:04:01,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36399 states. [2023-04-02 06:04:08,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36399 to 36380. [2023-04-02 06:04:08,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36380 states, 36376 states have (on average 1.3263140532219047) internal successors, (48246), 36376 states have internal predecessors, (48246), 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 06:04:08,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36380 states to 36380 states and 48249 transitions. [2023-04-02 06:04:08,342 INFO L78 Accepts]: Start accepts. Automaton has 36380 states and 48249 transitions. Word has length 73 [2023-04-02 06:04:08,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:04:08,342 INFO L495 AbstractCegarLoop]: Abstraction has 36380 states and 48249 transitions. [2023-04-02 06:04:08,342 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 06:04:08,342 INFO L276 IsEmpty]: Start isEmpty. Operand 36380 states and 48249 transitions. [2023-04-02 06:04:08,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 06:04:08,349 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:04:08,349 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:04:08,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-02 06:04:08,349 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:04:08,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:04:08,350 INFO L85 PathProgramCache]: Analyzing trace with hash 889713619, now seen corresponding path program 1 times [2023-04-02 06:04:08,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:04:08,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236823105] [2023-04-02 06:04:08,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:04:08,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:04:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:04:08,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:04:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:04:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 06:04:08,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:04:08,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236823105] [2023-04-02 06:04:08,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236823105] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:04:08,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:04:08,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:04:08,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278329393] [2023-04-02 06:04:08,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:04:08,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:04:08,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:04:08,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:04:08,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:04:08,514 INFO L87 Difference]: Start difference. First operand 36380 states and 48249 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:04:17,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:04:17,489 INFO L93 Difference]: Finished difference Result 71786 states and 95272 transitions. [2023-04-02 06:04:17,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:04:17,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-02 06:04:17,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:04:17,553 INFO L225 Difference]: With dead ends: 71786 [2023-04-02 06:04:17,553 INFO L226 Difference]: Without dead ends: 41637 [2023-04-02 06:04:17,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:04:17,582 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 454 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:04:17,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 132 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:04:17,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41637 states. [2023-04-02 06:04:25,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41637 to 36380. [2023-04-02 06:04:25,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36380 states, 36376 states have (on average 1.308692544534858) internal successors, (47605), 36376 states have internal predecessors, (47605), 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 06:04:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36380 states to 36380 states and 47608 transitions. [2023-04-02 06:04:25,271 INFO L78 Accepts]: Start accepts. Automaton has 36380 states and 47608 transitions. Word has length 73 [2023-04-02 06:04:25,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:04:25,271 INFO L495 AbstractCegarLoop]: Abstraction has 36380 states and 47608 transitions. [2023-04-02 06:04:25,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:04:25,271 INFO L276 IsEmpty]: Start isEmpty. Operand 36380 states and 47608 transitions. [2023-04-02 06:04:25,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 06:04:25,280 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:04:25,281 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:04:25,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-02 06:04:25,281 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:04:25,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:04:25,281 INFO L85 PathProgramCache]: Analyzing trace with hash -185618760, now seen corresponding path program 1 times [2023-04-02 06:04:25,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:04:25,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294408386] [2023-04-02 06:04:25,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:04:25,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:04:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:04:25,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:04:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:04:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:04:25,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:04:25,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294408386] [2023-04-02 06:04:25,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294408386] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:04:25,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52061946] [2023-04-02 06:04:25,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:04:25,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:04:25,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:04:25,506 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 06:04:25,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 06:04:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:04:25,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 06:04:25,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:04:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:04:25,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 06:04:25,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:04:25,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52061946] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 06:04:25,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 06:04:25,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-04-02 06:04:25,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201274624] [2023-04-02 06:04:25,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 06:04:25,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 06:04:25,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:04:25,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 06:04:25,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-04-02 06:04:25,944 INFO L87 Difference]: Start difference. First operand 36380 states and 47608 transitions. Second operand has 12 states, 12 states have (on average 10.166666666666666) internal successors, (122), 10 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:04:43,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:04:43,553 INFO L93 Difference]: Finished difference Result 92319 states and 120297 transitions. [2023-04-02 06:04:43,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 06:04:43,554 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.166666666666666) internal successors, (122), 10 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-02 06:04:43,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:04:43,707 INFO L225 Difference]: With dead ends: 92319 [2023-04-02 06:04:43,707 INFO L226 Difference]: Without dead ends: 68123 [2023-04-02 06:04:43,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2023-04-02 06:04:43,741 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 1116 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:04:43,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1116 Valid, 376 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:04:43,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68123 states. [2023-04-02 06:04:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68123 to 41182. [2023-04-02 06:04:53,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41182 states, 41178 states have (on average 1.3088299577444267) internal successors, (53895), 41178 states have internal predecessors, (53895), 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 06:04:53,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41182 states to 41182 states and 53898 transitions. [2023-04-02 06:04:53,425 INFO L78 Accepts]: Start accepts. Automaton has 41182 states and 53898 transitions. Word has length 73 [2023-04-02 06:04:53,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:04:53,426 INFO L495 AbstractCegarLoop]: Abstraction has 41182 states and 53898 transitions. [2023-04-02 06:04:53,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.166666666666666) internal successors, (122), 10 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:04:53,426 INFO L276 IsEmpty]: Start isEmpty. Operand 41182 states and 53898 transitions. [2023-04-02 06:04:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-02 06:04:53,432 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:04:53,432 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:04:53,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 06:04:53,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:04:53,633 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:04:53,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:04:53,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1585310952, now seen corresponding path program 1 times [2023-04-02 06:04:53,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:04:53,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820515532] [2023-04-02 06:04:53,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:04:53,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:04:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:04:53,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:04:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:04:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:04:53,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:04:53,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820515532] [2023-04-02 06:04:53,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820515532] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:04:53,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356005393] [2023-04-02 06:04:53,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:04:53,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:04:53,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:04:53,855 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 06:04:53,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 06:04:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:04:53,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-02 06:04:53,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:04:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:04:54,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 06:04:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:04:54,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356005393] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 06:04:54,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 06:04:54,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-04-02 06:04:54,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543162036] [2023-04-02 06:04:54,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 06:04:54,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 06:04:54,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:04:54,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 06:04:54,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-04-02 06:04:54,263 INFO L87 Difference]: Start difference. First operand 41182 states and 53898 transitions. Second operand has 12 states, 12 states have (on average 10.0) internal successors, (120), 10 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:05:10,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:05:10,109 INFO L93 Difference]: Finished difference Result 88867 states and 116160 transitions. [2023-04-02 06:05:10,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 06:05:10,110 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.0) internal successors, (120), 10 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2023-04-02 06:05:10,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:05:10,238 INFO L225 Difference]: With dead ends: 88867 [2023-04-02 06:05:10,238 INFO L226 Difference]: Without dead ends: 60686 [2023-04-02 06:05:10,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 140 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2023-04-02 06:05:10,276 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 1356 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:05:10,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1356 Valid, 301 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:05:10,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60686 states. [2023-04-02 06:05:21,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60686 to 42281. [2023-04-02 06:05:21,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42281 states, 42277 states have (on average 1.2984365021169904) internal successors, (54894), 42277 states have internal predecessors, (54894), 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 06:05:21,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42281 states to 42281 states and 54897 transitions. [2023-04-02 06:05:21,264 INFO L78 Accepts]: Start accepts. Automaton has 42281 states and 54897 transitions. Word has length 74 [2023-04-02 06:05:21,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:05:21,265 INFO L495 AbstractCegarLoop]: Abstraction has 42281 states and 54897 transitions. [2023-04-02 06:05:21,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.0) internal successors, (120), 10 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:05:21,265 INFO L276 IsEmpty]: Start isEmpty. Operand 42281 states and 54897 transitions. [2023-04-02 06:05:21,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-02 06:05:21,271 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:05:21,272 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:05:21,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-02 06:05:21,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:05:21,472 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:05:21,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:05:21,473 INFO L85 PathProgramCache]: Analyzing trace with hash -534906293, now seen corresponding path program 1 times [2023-04-02 06:05:21,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:05:21,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277628116] [2023-04-02 06:05:21,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:05:21,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:05:21,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:05:21,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:05:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:05:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:05:21,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:05:21,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277628116] [2023-04-02 06:05:21,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277628116] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:05:21,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027995937] [2023-04-02 06:05:21,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:05:21,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:05:21,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:05:21,793 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 06:05:21,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 06:05:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:05:21,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 06:05:21,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:05:22,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:05:22,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 06:05:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:05:22,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027995937] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 06:05:22,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 06:05:22,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2023-04-02 06:05:22,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740591136] [2023-04-02 06:05:22,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 06:05:22,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-02 06:05:22,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:05:22,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-02 06:05:22,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-04-02 06:05:22,831 INFO L87 Difference]: Start difference. First operand 42281 states and 54897 transitions. Second operand has 24 states, 24 states have (on average 6.875) internal successors, (165), 22 states have internal predecessors, (165), 4 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3)