/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.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 06:32:42,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 06:32:42,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 06:32:42,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 06:32:42,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 06:32:42,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 06:32:42,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 06:32:42,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 06:32:42,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 06:32:42,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 06:32:42,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 06:32:42,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 06:32:42,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 06:32:42,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 06:32:42,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 06:32:42,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 06:32:42,873 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 06:32:42,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 06:32:42,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 06:32:42,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 06:32:42,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 06:32:42,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 06:32:42,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 06:32:42,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 06:32:42,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 06:32:42,883 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 06:32:42,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 06:32:42,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 06:32:42,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 06:32:42,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 06:32:42,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 06:32:42,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 06:32:42,887 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 06:32:42,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 06:32:42,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 06:32:42,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 06:32:42,900 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 06:32:42,919 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 06:32:42,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 06:32:42,920 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 06:32:42,920 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 06:32:42,920 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 06:32:42,920 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 06:32:42,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 06:32:42,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 06:32:42,921 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 06:32:42,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 06:32:42,921 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 06:32:42,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 06:32:42,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 06:32:42,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 06:32:42,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 06:32:42,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 06:32:42,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 06:32:42,922 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 06:32:42,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 06:32:42,922 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 06:32:42,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 06:32:42,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 06:32:42,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 06:32:42,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 06:32:42,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:32:42,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 06:32:42,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 06:32:42,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 06:32:42,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 06:32:42,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 06:32:42,923 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 06:32:42,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 06:32:42,923 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 06:32:42,923 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 06:32:42,923 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 06:32:42,924 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 06:32:43,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 06:32:43,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 06:32:43,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 06:32:43,150 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 06:32:43,150 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 06:32:43,151 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:32:44,331 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 06:32:44,514 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 06:32:44,515 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:32:44,532 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33d68ebed/b6fda2fed6364f1fb725cdc9852cdcb5/FLAG35217eaba [2023-04-02 06:32:44,544 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33d68ebed/b6fda2fed6364f1fb725cdc9852cdcb5 [2023-04-02 06:32:44,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 06:32:44,547 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 06:32:44,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 06:32:44,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 06:32:44,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 06:32:44,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:32:44" (1/1) ... [2023-04-02 06:32:44,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48df9c39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:32:44, skipping insertion in model container [2023-04-02 06:32:44,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:32:44" (1/1) ... [2023-04-02 06:32:44,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 06:32:44,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 06:32:44,756 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.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5807,5820] [2023-04-02 06:32:44,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:32:44,791 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 06:32:44,837 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.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5807,5820] [2023-04-02 06:32:44,855 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:32:44,880 INFO L208 MainTranslator]: Completed translation [2023-04-02 06:32:44,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:32:44 WrapperNode [2023-04-02 06:32:44,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 06:32:44,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 06:32:44,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 06:32:44,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 06:32:44,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:32:44" (1/1) ... [2023-04-02 06:32:44,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:32:44" (1/1) ... [2023-04-02 06:32:44,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:32:44" (1/1) ... [2023-04-02 06:32:44,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:32:44" (1/1) ... [2023-04-02 06:32:44,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:32:44" (1/1) ... [2023-04-02 06:32:44,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:32:44" (1/1) ... [2023-04-02 06:32:44,915 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:32:44" (1/1) ... [2023-04-02 06:32:44,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:32:44" (1/1) ... [2023-04-02 06:32:44,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 06:32:44,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 06:32:44,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 06:32:44,919 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 06:32:44,920 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:32:44" (1/1) ... [2023-04-02 06:32:44,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:32:44,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:32:44,966 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 06:32:44,991 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 06:32:45,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 06:32:45,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 06:32:45,010 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 06:32:45,010 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 06:32:45,011 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 06:32:45,011 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 06:32:45,011 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 06:32:45,011 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 06:32:45,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 06:32:45,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 06:32:45,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 06:32:45,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-02 06:32:45,011 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 06:32:45,012 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 06:32:45,012 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 06:32:45,012 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 06:32:45,012 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 06:32:45,012 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 06:32:45,012 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 06:32:45,012 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-02 06:32:45,012 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-02 06:32:45,013 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 06:32:45,013 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 06:32:45,013 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 06:32:45,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 06:32:45,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 06:32:45,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 06:32:45,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 06:32:45,013 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 06:32:45,013 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 06:32:45,172 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 06:32:45,174 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 06:32:45,643 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 06:32:45,649 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 06:32:45,649 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 06:32:45,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:32:45 BoogieIcfgContainer [2023-04-02 06:32:45,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 06:32:45,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 06:32:45,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 06:32:45,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 06:32:45,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 06:32:44" (1/3) ... [2023-04-02 06:32:45,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@453a3384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:32:45, skipping insertion in model container [2023-04-02 06:32:45,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:32:44" (2/3) ... [2023-04-02 06:32:45,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@453a3384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:32:45, skipping insertion in model container [2023-04-02 06:32:45,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:32:45" (3/3) ... [2023-04-02 06:32:45,656 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:32:45,669 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 06:32:45,669 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 06:32:45,715 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 06:32:45,720 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;@219f0fb8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 06:32:45,720 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 06:32:45,724 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 98 states have (on average 1.7142857142857142) internal successors, (168), 100 states have internal predecessors, (168), 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 06:32:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-02 06:32:45,732 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:32:45,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:32:45,733 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:32:45,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:32:45,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1593691726, now seen corresponding path program 1 times [2023-04-02 06:32:45,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:32:45,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278177583] [2023-04-02 06:32:45,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:32:45,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:32:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:46,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:32:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:46,297 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 06:32:46,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:32:46,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278177583] [2023-04-02 06:32:46,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278177583] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:32:46,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:32:46,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:32:46,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784922018] [2023-04-02 06:32:46,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:32:46,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:32:46,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:32:46,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:32:46,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:32:46,332 INFO L87 Difference]: Start difference. First operand has 105 states, 98 states have (on average 1.7142857142857142) internal successors, (168), 100 states have internal predecessors, (168), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:46,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:32:46,899 INFO L93 Difference]: Finished difference Result 231 states and 363 transitions. [2023-04-02 06:32:46,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:32:46,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 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 64 [2023-04-02 06:32:46,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:32:46,907 INFO L225 Difference]: With dead ends: 231 [2023-04-02 06:32:46,907 INFO L226 Difference]: Without dead ends: 152 [2023-04-02 06:32:46,909 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 06:32:46,912 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 112 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:32:46,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 347 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:32:46,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-04-02 06:32:46,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2023-04-02 06:32:46,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 146 states have (on average 1.4383561643835616) internal successors, (210), 146 states have internal predecessors, (210), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:46,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 213 transitions. [2023-04-02 06:32:46,952 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 213 transitions. Word has length 64 [2023-04-02 06:32:46,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:32:46,952 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 213 transitions. [2023-04-02 06:32:46,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:46,952 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 213 transitions. [2023-04-02 06:32:46,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-02 06:32:46,953 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:32:46,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:32:46,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 06:32:46,954 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:32:46,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:32:46,954 INFO L85 PathProgramCache]: Analyzing trace with hash 2052026808, now seen corresponding path program 1 times [2023-04-02 06:32:46,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:32:46,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266307897] [2023-04-02 06:32:46,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:32:46,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:32:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:47,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:32:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:47,120 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 06:32:47,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:32:47,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266307897] [2023-04-02 06:32:47,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266307897] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:32:47,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:32:47,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:32:47,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233465992] [2023-04-02 06:32:47,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:32:47,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:32:47,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:32:47,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:32:47,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:32:47,123 INFO L87 Difference]: Start difference. First operand 150 states and 213 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 06:32:47,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:32:47,503 INFO L93 Difference]: Finished difference Result 358 states and 537 transitions. [2023-04-02 06:32:47,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:32:47,503 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 06:32:47,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:32:47,505 INFO L225 Difference]: With dead ends: 358 [2023-04-02 06:32:47,505 INFO L226 Difference]: Without dead ends: 246 [2023-04-02 06:32:47,506 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 06:32:47,507 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 78 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:32:47,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 282 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:32:47,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-04-02 06:32:47,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2023-04-02 06:32:47,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 240 states have (on average 1.4833333333333334) internal successors, (356), 240 states have internal predecessors, (356), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:47,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 359 transitions. [2023-04-02 06:32:47,530 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 359 transitions. Word has length 65 [2023-04-02 06:32:47,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:32:47,530 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 359 transitions. [2023-04-02 06:32:47,530 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 06:32:47,530 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 359 transitions. [2023-04-02 06:32:47,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-02 06:32:47,532 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:32:47,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:32:47,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 06:32:47,532 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:32:47,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:32:47,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1104350607, now seen corresponding path program 1 times [2023-04-02 06:32:47,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:32:47,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138023015] [2023-04-02 06:32:47,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:32:47,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:32:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:47,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:32:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:47,699 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 06:32:47,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:32:47,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138023015] [2023-04-02 06:32:47,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138023015] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:32:47,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:32:47,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:32:47,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373516440] [2023-04-02 06:32:47,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:32:47,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:32:47,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:32:47,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:32:47,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:32:47,701 INFO L87 Difference]: Start difference. First operand 244 states and 359 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:48,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:32:48,040 INFO L93 Difference]: Finished difference Result 624 states and 949 transitions. [2023-04-02 06:32:48,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:32:48,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2023-04-02 06:32:48,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:32:48,043 INFO L225 Difference]: With dead ends: 624 [2023-04-02 06:32:48,043 INFO L226 Difference]: Without dead ends: 418 [2023-04-02 06:32:48,044 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 06:32:48,045 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 73 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:32:48,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 278 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:32:48,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2023-04-02 06:32:48,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 416. [2023-04-02 06:32:48,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 412 states have (on average 1.5048543689320388) internal successors, (620), 412 states have internal predecessors, (620), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:48,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 623 transitions. [2023-04-02 06:32:48,074 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 623 transitions. Word has length 66 [2023-04-02 06:32:48,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:32:48,075 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 623 transitions. [2023-04-02 06:32:48,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:48,075 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 623 transitions. [2023-04-02 06:32:48,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-02 06:32:48,076 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:32:48,076 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:32:48,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 06:32:48,076 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:32:48,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:32:48,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1865091830, now seen corresponding path program 1 times [2023-04-02 06:32:48,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:32:48,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006839705] [2023-04-02 06:32:48,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:32:48,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:32:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:48,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:32:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:48,235 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 06:32:48,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:32:48,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006839705] [2023-04-02 06:32:48,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006839705] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:32:48,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:32:48,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:32:48,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236337959] [2023-04-02 06:32:48,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:32:48,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:32:48,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:32:48,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:32:48,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:32:48,237 INFO L87 Difference]: Start difference. First operand 416 states and 623 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 06:32:48,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:32:48,573 INFO L93 Difference]: Finished difference Result 1108 states and 1689 transitions. [2023-04-02 06:32:48,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:32:48,573 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 06:32:48,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:32:48,576 INFO L225 Difference]: With dead ends: 1108 [2023-04-02 06:32:48,576 INFO L226 Difference]: Without dead ends: 730 [2023-04-02 06:32:48,577 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 06:32:48,578 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 68 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:32:48,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 274 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:32:48,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2023-04-02 06:32:48,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 728. [2023-04-02 06:32:48,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 724 states have (on average 1.5082872928176796) internal successors, (1092), 724 states have internal predecessors, (1092), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:48,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 1095 transitions. [2023-04-02 06:32:48,622 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 1095 transitions. Word has length 67 [2023-04-02 06:32:48,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:32:48,622 INFO L495 AbstractCegarLoop]: Abstraction has 728 states and 1095 transitions. [2023-04-02 06:32:48,622 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 06:32:48,622 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 1095 transitions. [2023-04-02 06:32:48,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 06:32:48,623 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:32:48,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:32:48,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 06:32:48,623 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:32:48,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:32:48,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1815849635, now seen corresponding path program 1 times [2023-04-02 06:32:48,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:32:48,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856677427] [2023-04-02 06:32:48,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:32:48,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:32:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:48,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:32:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:48,947 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 06:32:48,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:32:48,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856677427] [2023-04-02 06:32:48,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856677427] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:32:48,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:32:48,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 06:32:48,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547479590] [2023-04-02 06:32:48,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:32:48,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:32:48,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:32:48,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:32:48,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:32:48,949 INFO L87 Difference]: Start difference. First operand 728 states and 1095 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 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 06:32:49,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:32:49,891 INFO L93 Difference]: Finished difference Result 7628 states and 11665 transitions. [2023-04-02 06:32:49,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 06:32:49,891 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 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 06:32:49,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:32:49,912 INFO L225 Difference]: With dead ends: 7628 [2023-04-02 06:32:49,912 INFO L226 Difference]: Without dead ends: 6938 [2023-04-02 06:32:49,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2023-04-02 06:32:49,915 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 1170 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:32:49,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1170 Valid, 1751 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:32:49,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6938 states. [2023-04-02 06:32:50,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6938 to 1416. [2023-04-02 06:32:50,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1412 states have (on average 1.5099150141643058) internal successors, (2132), 1412 states have internal predecessors, (2132), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:50,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2135 transitions. [2023-04-02 06:32:50,086 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2135 transitions. Word has length 68 [2023-04-02 06:32:50,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:32:50,087 INFO L495 AbstractCegarLoop]: Abstraction has 1416 states and 2135 transitions. [2023-04-02 06:32:50,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 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 06:32:50,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2135 transitions. [2023-04-02 06:32:50,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 06:32:50,088 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:32:50,088 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:32:50,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 06:32:50,088 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:32:50,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:32:50,088 INFO L85 PathProgramCache]: Analyzing trace with hash 381585374, now seen corresponding path program 1 times [2023-04-02 06:32:50,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:32:50,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92439318] [2023-04-02 06:32:50,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:32:50,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:32:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:50,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:32:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:50,256 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 06:32:50,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:32:50,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92439318] [2023-04-02 06:32:50,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92439318] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:32:50,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:32:50,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:32:50,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717701747] [2023-04-02 06:32:50,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:32:50,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:32:50,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:32:50,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:32:50,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:32:50,258 INFO L87 Difference]: Start difference. First operand 1416 states and 2135 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:50,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:32:50,781 INFO L93 Difference]: Finished difference Result 4028 states and 6089 transitions. [2023-04-02 06:32:50,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:32:50,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2023-04-02 06:32:50,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:32:50,789 INFO L225 Difference]: With dead ends: 4028 [2023-04-02 06:32:50,789 INFO L226 Difference]: Without dead ends: 2650 [2023-04-02 06:32:50,791 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 06:32:50,792 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 61 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:32:50,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 220 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:32:50,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2023-04-02 06:32:51,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2616. [2023-04-02 06:32:51,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2616 states, 2612 states have (on average 1.4900459418070444) internal successors, (3892), 2612 states have internal predecessors, (3892), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2616 states to 2616 states and 3895 transitions. [2023-04-02 06:32:51,102 INFO L78 Accepts]: Start accepts. Automaton has 2616 states and 3895 transitions. Word has length 70 [2023-04-02 06:32:51,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:32:51,103 INFO L495 AbstractCegarLoop]: Abstraction has 2616 states and 3895 transitions. [2023-04-02 06:32:51,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:51,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2616 states and 3895 transitions. [2023-04-02 06:32:51,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 06:32:51,104 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:32:51,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:32:51,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 06:32:51,104 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:32:51,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:32:51,104 INFO L85 PathProgramCache]: Analyzing trace with hash 401634717, now seen corresponding path program 1 times [2023-04-02 06:32:51,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:32:51,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63150062] [2023-04-02 06:32:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:32:51,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:32:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:51,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:32:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:51,464 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 06:32:51,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:32:51,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63150062] [2023-04-02 06:32:51,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63150062] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:32:51,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:32:51,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 06:32:51,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549493866] [2023-04-02 06:32:51,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:32:51,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:32:51,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:32:51,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:32:51,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:32:51,467 INFO L87 Difference]: Start difference. First operand 2616 states and 3895 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:52,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:32:52,118 INFO L93 Difference]: Finished difference Result 5196 states and 7753 transitions. [2023-04-02 06:32:52,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 06:32:52,119 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2023-04-02 06:32:52,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:32:52,126 INFO L225 Difference]: With dead ends: 5196 [2023-04-02 06:32:52,126 INFO L226 Difference]: Without dead ends: 2618 [2023-04-02 06:32:52,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2023-04-02 06:32:52,130 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 331 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:32:52,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 503 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:32:52,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2023-04-02 06:32:52,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 2616. [2023-04-02 06:32:52,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2616 states, 2612 states have (on average 1.4777947932618682) internal successors, (3860), 2612 states have internal predecessors, (3860), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:52,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2616 states to 2616 states and 3863 transitions. [2023-04-02 06:32:52,390 INFO L78 Accepts]: Start accepts. Automaton has 2616 states and 3863 transitions. Word has length 70 [2023-04-02 06:32:52,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:32:52,390 INFO L495 AbstractCegarLoop]: Abstraction has 2616 states and 3863 transitions. [2023-04-02 06:32:52,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 7 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:52,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2616 states and 3863 transitions. [2023-04-02 06:32:52,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-02 06:32:52,391 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:32:52,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:32:52,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 06:32:52,392 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:32:52,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:32:52,392 INFO L85 PathProgramCache]: Analyzing trace with hash 547031724, now seen corresponding path program 1 times [2023-04-02 06:32:52,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:32:52,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652141348] [2023-04-02 06:32:52,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:32:52,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:32:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:52,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:32:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:52,542 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 06:32:52,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:32:52,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652141348] [2023-04-02 06:32:52,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652141348] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:32:52,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:32:52,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:32:52,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080318562] [2023-04-02 06:32:52,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:32:52,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:32:52,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:32:52,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:32:52,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:32:52,544 INFO L87 Difference]: Start difference. First operand 2616 states and 3863 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:53,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:32:53,330 INFO L93 Difference]: Finished difference Result 5055 states and 7517 transitions. [2023-04-02 06:32:53,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:32:53,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2023-04-02 06:32:53,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:32:53,342 INFO L225 Difference]: With dead ends: 5055 [2023-04-02 06:32:53,342 INFO L226 Difference]: Without dead ends: 3676 [2023-04-02 06:32:53,345 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 06:32:53,345 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 85 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:32:53,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 297 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:32:53,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3676 states. [2023-04-02 06:32:53,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3676 to 3674. [2023-04-02 06:32:53,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3670 states have (on average 1.4708446866485014) internal successors, (5398), 3670 states have internal predecessors, (5398), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:53,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 5401 transitions. [2023-04-02 06:32:53,738 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 5401 transitions. Word has length 71 [2023-04-02 06:32:53,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:32:53,738 INFO L495 AbstractCegarLoop]: Abstraction has 3674 states and 5401 transitions. [2023-04-02 06:32:53,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 3 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:53,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 5401 transitions. [2023-04-02 06:32:53,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-02 06:32:53,739 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:32:53,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:32:53,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 06:32:53,739 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:32:53,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:32:53,739 INFO L85 PathProgramCache]: Analyzing trace with hash -436135013, now seen corresponding path program 1 times [2023-04-02 06:32:53,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:32:53,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375948371] [2023-04-02 06:32:53,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:32:53,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:32:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:53,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:32:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:53,955 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 06:32:53,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:32:53,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375948371] [2023-04-02 06:32:53,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375948371] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:32:53,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:32:53,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:32:53,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555689229] [2023-04-02 06:32:53,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:32:53,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:32:53,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:32:53,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:32:53,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:32:53,958 INFO L87 Difference]: Start difference. First operand 3674 states and 5401 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:54,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:32:54,676 INFO L93 Difference]: Finished difference Result 7308 states and 10762 transitions. [2023-04-02 06:32:54,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:32:54,676 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2023-04-02 06:32:54,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:32:54,686 INFO L225 Difference]: With dead ends: 7308 [2023-04-02 06:32:54,686 INFO L226 Difference]: Without dead ends: 3674 [2023-04-02 06:32:54,691 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 06:32:54,693 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 328 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:32:54,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 96 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:32:54,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2023-04-02 06:32:55,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3674. [2023-04-02 06:32:55,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3670 states have (on average 1.457765667574932) internal successors, (5350), 3670 states have internal predecessors, (5350), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:55,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 5353 transitions. [2023-04-02 06:32:55,198 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 5353 transitions. Word has length 71 [2023-04-02 06:32:55,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:32:55,198 INFO L495 AbstractCegarLoop]: Abstraction has 3674 states and 5353 transitions. [2023-04-02 06:32:55,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:55,199 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 5353 transitions. [2023-04-02 06:32:55,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-02 06:32:55,199 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:32:55,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:32:55,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 06:32:55,199 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:32:55,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:32:55,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1198998720, now seen corresponding path program 1 times [2023-04-02 06:32:55,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:32:55,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785449236] [2023-04-02 06:32:55,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:32:55,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:32:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:55,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:32:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:55,457 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 06:32:55,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:32:55,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785449236] [2023-04-02 06:32:55,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785449236] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:32:55,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:32:55,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:32:55,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055870650] [2023-04-02 06:32:55,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:32:55,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:32:55,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:32:55,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:32:55,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:32:55,459 INFO L87 Difference]: Start difference. First operand 3674 states and 5353 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:56,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:32:56,167 INFO L93 Difference]: Finished difference Result 7308 states and 10666 transitions. [2023-04-02 06:32:56,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:32:56,168 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2023-04-02 06:32:56,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:32:56,191 INFO L225 Difference]: With dead ends: 7308 [2023-04-02 06:32:56,191 INFO L226 Difference]: Without dead ends: 3674 [2023-04-02 06:32:56,197 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 06:32:56,197 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 312 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:32:56,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 104 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:32:56,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2023-04-02 06:32:56,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3674. [2023-04-02 06:32:56,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3670 states have (on average 1.4446866485013623) internal successors, (5302), 3670 states have internal predecessors, (5302), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:56,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 5305 transitions. [2023-04-02 06:32:56,622 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 5305 transitions. Word has length 71 [2023-04-02 06:32:56,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:32:56,622 INFO L495 AbstractCegarLoop]: Abstraction has 3674 states and 5305 transitions. [2023-04-02 06:32:56,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:56,623 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 5305 transitions. [2023-04-02 06:32:56,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-02 06:32:56,623 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:32:56,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:32:56,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 06:32:56,623 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:32:56,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:32:56,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1070913413, now seen corresponding path program 1 times [2023-04-02 06:32:56,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:32:56,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263406614] [2023-04-02 06:32:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:32:56,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:32:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:56,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:32:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:56,812 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 06:32:56,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:32:56,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263406614] [2023-04-02 06:32:56,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263406614] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:32:56,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:32:56,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:32:56,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169617983] [2023-04-02 06:32:56,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:32:56,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:32:56,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:32:56,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:32:56,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:32:56,814 INFO L87 Difference]: Start difference. First operand 3674 states and 5305 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:57,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:32:57,692 INFO L93 Difference]: Finished difference Result 7308 states and 10570 transitions. [2023-04-02 06:32:57,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:32:57,692 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2023-04-02 06:32:57,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:32:57,700 INFO L225 Difference]: With dead ends: 7308 [2023-04-02 06:32:57,700 INFO L226 Difference]: Without dead ends: 3674 [2023-04-02 06:32:57,707 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 06:32:57,707 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 283 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:32:57,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 120 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:32:57,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2023-04-02 06:32:58,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3674. [2023-04-02 06:32:58,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3670 states have (on average 1.4316076294277928) internal successors, (5254), 3670 states have internal predecessors, (5254), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:58,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 5257 transitions. [2023-04-02 06:32:58,171 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 5257 transitions. Word has length 71 [2023-04-02 06:32:58,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:32:58,172 INFO L495 AbstractCegarLoop]: Abstraction has 3674 states and 5257 transitions. [2023-04-02 06:32:58,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:58,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 5257 transitions. [2023-04-02 06:32:58,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-02 06:32:58,172 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:32:58,172 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:32:58,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 06:32:58,173 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:32:58,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:32:58,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1600203914, now seen corresponding path program 1 times [2023-04-02 06:32:58,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:32:58,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828608943] [2023-04-02 06:32:58,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:32:58,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:32:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:58,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:32:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:32:58,423 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 06:32:58,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:32:58,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828608943] [2023-04-02 06:32:58,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828608943] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:32:58,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:32:58,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:32:58,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921908034] [2023-04-02 06:32:58,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:32:58,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:32:58,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:32:58,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:32:58,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:32:58,424 INFO L87 Difference]: Start difference. First operand 3674 states and 5257 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:59,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:32:59,342 INFO L93 Difference]: Finished difference Result 5378 states and 7664 transitions. [2023-04-02 06:32:59,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:32:59,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2023-04-02 06:32:59,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:32:59,350 INFO L225 Difference]: With dead ends: 5378 [2023-04-02 06:32:59,350 INFO L226 Difference]: Without dead ends: 5376 [2023-04-02 06:32:59,351 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 06:32:59,351 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 171 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:32:59,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 588 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:32:59,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2023-04-02 06:32:59,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 3738. [2023-04-02 06:32:59,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3738 states, 3734 states have (on average 1.4113551151580075) internal successors, (5270), 3734 states have internal predecessors, (5270), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:59,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 5273 transitions. [2023-04-02 06:32:59,833 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 5273 transitions. Word has length 71 [2023-04-02 06:32:59,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:32:59,833 INFO L495 AbstractCegarLoop]: Abstraction has 3738 states and 5273 transitions. [2023-04-02 06:32:59,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:32:59,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 5273 transitions. [2023-04-02 06:32:59,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-02 06:32:59,835 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:32:59,835 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:32:59,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 06:32:59,835 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:32:59,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:32:59,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1871786038, now seen corresponding path program 1 times [2023-04-02 06:32:59,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:32:59,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464737505] [2023-04-02 06:32:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:32:59,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:32:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:33:00,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:33:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:33:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 06:33:00,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:33:00,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464737505] [2023-04-02 06:33:00,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464737505] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:33:00,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:33:00,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 06:33:00,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942107800] [2023-04-02 06:33:00,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:33:00,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:33:00,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:33:00,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:33:00,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:33:00,063 INFO L87 Difference]: Start difference. First operand 3738 states and 5273 transitions. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 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 06:33:03,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:33:03,232 INFO L93 Difference]: Finished difference Result 22852 states and 32278 transitions. [2023-04-02 06:33:03,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 06:33:03,233 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 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 98 [2023-04-02 06:33:03,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:33:03,264 INFO L225 Difference]: With dead ends: 22852 [2023-04-02 06:33:03,264 INFO L226 Difference]: Without dead ends: 19154 [2023-04-02 06:33:03,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-04-02 06:33:03,273 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 899 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:33:03,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 785 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:33:03,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19154 states. [2023-04-02 06:33:04,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19154 to 7434. [2023-04-02 06:33:04,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7434 states, 7430 states have (on average 1.4069986541049797) internal successors, (10454), 7430 states have internal predecessors, (10454), 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 06:33:04,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7434 states to 7434 states and 10457 transitions. [2023-04-02 06:33:04,426 INFO L78 Accepts]: Start accepts. Automaton has 7434 states and 10457 transitions. Word has length 98 [2023-04-02 06:33:04,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:33:04,426 INFO L495 AbstractCegarLoop]: Abstraction has 7434 states and 10457 transitions. [2023-04-02 06:33:04,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 7 states have internal predecessors, (87), 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 06:33:04,427 INFO L276 IsEmpty]: Start isEmpty. Operand 7434 states and 10457 transitions. [2023-04-02 06:33:04,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-02 06:33:04,435 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:33:04,438 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:33:04,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 06:33:04,438 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:33:04,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:33:04,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1848040816, now seen corresponding path program 1 times [2023-04-02 06:33:04,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:33:04,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095407200] [2023-04-02 06:33:04,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:33:04,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:33:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:33:04,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:33:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:33:04,655 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-02 06:33:04,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:33:04,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095407200] [2023-04-02 06:33:04,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095407200] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:33:04,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:33:04,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 06:33:04,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856914727] [2023-04-02 06:33:04,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:33:04,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:33:04,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:33:04,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:33:04,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:33:04,657 INFO L87 Difference]: Start difference. First operand 7434 states and 10457 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 7 states have internal predecessors, (86), 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 06:33:08,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:33:08,423 INFO L93 Difference]: Finished difference Result 26548 states and 37462 transitions. [2023-04-02 06:33:08,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 06:33:08,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 7 states have internal predecessors, (86), 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 98 [2023-04-02 06:33:08,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:33:08,468 INFO L225 Difference]: With dead ends: 26548 [2023-04-02 06:33:08,469 INFO L226 Difference]: Without dead ends: 22850 [2023-04-02 06:33:08,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-04-02 06:33:08,483 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 851 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:33:08,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 814 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:33:08,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22850 states. [2023-04-02 06:33:10,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22850 to 12954. [2023-04-02 06:33:10,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12954 states, 12950 states have (on average 1.402162162162162) internal successors, (18158), 12950 states have internal predecessors, (18158), 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 06:33:11,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12954 states to 12954 states and 18161 transitions. [2023-04-02 06:33:11,006 INFO L78 Accepts]: Start accepts. Automaton has 12954 states and 18161 transitions. Word has length 98 [2023-04-02 06:33:11,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:33:11,006 INFO L495 AbstractCegarLoop]: Abstraction has 12954 states and 18161 transitions. [2023-04-02 06:33:11,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 7 states have internal predecessors, (86), 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 06:33:11,007 INFO L276 IsEmpty]: Start isEmpty. Operand 12954 states and 18161 transitions. [2023-04-02 06:33:11,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-02 06:33:11,010 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:33:11,010 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:33:11,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-02 06:33:11,010 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:33:11,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:33:11,011 INFO L85 PathProgramCache]: Analyzing trace with hash 2050655364, now seen corresponding path program 1 times [2023-04-02 06:33:11,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:33:11,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25433793] [2023-04-02 06:33:11,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:33:11,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:33:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:33:11,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:33:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:33:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 06:33:11,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:33:11,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25433793] [2023-04-02 06:33:11,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25433793] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:33:11,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:33:11,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 06:33:11,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417134166] [2023-04-02 06:33:11,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:33:11,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:33:11,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:33:11,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:33:11,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:33:11,425 INFO L87 Difference]: Start difference. First operand 12954 states and 18161 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 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 06:33:16,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:33:16,082 INFO L93 Difference]: Finished difference Result 30244 states and 42646 transitions. [2023-04-02 06:33:16,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 06:33:16,085 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 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 98 [2023-04-02 06:33:16,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:33:16,135 INFO L225 Difference]: With dead ends: 30244 [2023-04-02 06:33:16,135 INFO L226 Difference]: Without dead ends: 26546 [2023-04-02 06:33:16,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-04-02 06:33:16,146 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 750 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:33:16,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 931 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:33:16,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26546 states. [2023-04-02 06:33:19,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26546 to 16650. [2023-04-02 06:33:19,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16650 states, 16646 states have (on average 1.4022588009131323) internal successors, (23342), 16646 states have internal predecessors, (23342), 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 06:33:19,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16650 states to 16650 states and 23345 transitions. [2023-04-02 06:33:19,262 INFO L78 Accepts]: Start accepts. Automaton has 16650 states and 23345 transitions. Word has length 98 [2023-04-02 06:33:19,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:33:19,264 INFO L495 AbstractCegarLoop]: Abstraction has 16650 states and 23345 transitions. [2023-04-02 06:33:19,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 7 states have internal predecessors, (88), 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 06:33:19,264 INFO L276 IsEmpty]: Start isEmpty. Operand 16650 states and 23345 transitions. [2023-04-02 06:33:19,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-02 06:33:19,269 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:33:19,269 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:33:19,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-02 06:33:19,269 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:33:19,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:33:19,270 INFO L85 PathProgramCache]: Analyzing trace with hash 138297534, now seen corresponding path program 1 times [2023-04-02 06:33:19,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:33:19,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590645330] [2023-04-02 06:33:19,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:33:19,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:33:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:33:19,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:33:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:33:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 06:33:19,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:33:19,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590645330] [2023-04-02 06:33:19,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590645330] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:33:19,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:33:19,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 06:33:19,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699371148] [2023-04-02 06:33:19,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:33:19,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:33:19,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:33:19,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:33:19,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:33:19,486 INFO L87 Difference]: Start difference. First operand 16650 states and 23345 transitions. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 7 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:33:25,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:33:25,224 INFO L93 Difference]: Finished difference Result 33940 states and 47830 transitions. [2023-04-02 06:33:25,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 06:33:25,239 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 7 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2023-04-02 06:33:25,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:33:25,281 INFO L225 Difference]: With dead ends: 33940 [2023-04-02 06:33:25,282 INFO L226 Difference]: Without dead ends: 30242 [2023-04-02 06:33:25,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-04-02 06:33:25,301 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 791 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:33:25,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 932 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:33:25,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30242 states. [2023-04-02 06:33:29,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30242 to 20346. [2023-04-02 06:33:29,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20346 states, 20342 states have (on average 1.402320322485498) internal successors, (28526), 20342 states have internal predecessors, (28526), 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 06:33:29,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20346 states to 20346 states and 28529 transitions. [2023-04-02 06:33:29,274 INFO L78 Accepts]: Start accepts. Automaton has 20346 states and 28529 transitions. Word has length 98 [2023-04-02 06:33:29,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:33:29,275 INFO L495 AbstractCegarLoop]: Abstraction has 20346 states and 28529 transitions. [2023-04-02 06:33:29,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 7 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:33:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 20346 states and 28529 transitions. [2023-04-02 06:33:29,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-02 06:33:29,279 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:33:29,279 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, 1, 1, 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 06:33:29,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-02 06:33:29,279 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:33:29,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:33:29,279 INFO L85 PathProgramCache]: Analyzing trace with hash -2027725308, now seen corresponding path program 1 times [2023-04-02 06:33:29,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:33:29,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651447619] [2023-04-02 06:33:29,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:33:29,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:33:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:33:29,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:33:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:33:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:33:29,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:33:29,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651447619] [2023-04-02 06:33:29,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651447619] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:33:29,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:33:29,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-04-02 06:33:29,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895694750] [2023-04-02 06:33:29,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:33:29,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 06:33:29,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:33:29,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 06:33:29,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-04-02 06:33:29,479 INFO L87 Difference]: Start difference. First operand 20346 states and 28529 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:33:36,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:33:36,396 INFO L93 Difference]: Finished difference Result 35236 states and 49654 transitions. [2023-04-02 06:33:36,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 06:33:36,396 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2023-04-02 06:33:36,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:33:36,466 INFO L225 Difference]: With dead ends: 35236 [2023-04-02 06:33:36,467 INFO L226 Difference]: Without dead ends: 32738 [2023-04-02 06:33:36,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-04-02 06:33:36,477 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 785 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:33:36,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [785 Valid, 848 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:33:36,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32738 states. [2023-04-02 06:33:41,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32738 to 22842. [2023-04-02 06:33:41,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22842 states, 22838 states have (on average 1.4031876696733514) internal successors, (32046), 22838 states have internal predecessors, (32046), 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 06:33:41,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22842 states to 22842 states and 32049 transitions. [2023-04-02 06:33:41,258 INFO L78 Accepts]: Start accepts. Automaton has 22842 states and 32049 transitions. Word has length 99 [2023-04-02 06:33:41,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:33:41,258 INFO L495 AbstractCegarLoop]: Abstraction has 22842 states and 32049 transitions. [2023-04-02 06:33:41,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 7 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:33:41,259 INFO L276 IsEmpty]: Start isEmpty. Operand 22842 states and 32049 transitions. [2023-04-02 06:33:41,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-02 06:33:41,263 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:33:41,263 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:33:41,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-02 06:33:41,263 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:33:41,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:33:41,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1997349339, now seen corresponding path program 1 times [2023-04-02 06:33:41,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:33:41,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373679150] [2023-04-02 06:33:41,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:33:41,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:33:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:33:41,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:33:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:33:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:33:41,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:33:41,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373679150] [2023-04-02 06:33:41,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373679150] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:33:41,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:33:41,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:33:41,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468810023] [2023-04-02 06:33:41,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:33:41,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:33:41,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:33:41,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:33:41,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:33:41,449 INFO L87 Difference]: Start difference. First operand 22842 states and 32049 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:33:44,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:33:44,976 INFO L93 Difference]: Finished difference Result 39076 states and 54945 transitions. [2023-04-02 06:33:44,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:33:44,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2023-04-02 06:33:44,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:33:45,001 INFO L225 Difference]: With dead ends: 39076 [2023-04-02 06:33:45,001 INFO L226 Difference]: Without dead ends: 16274 [2023-04-02 06:33:45,030 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 06:33:45,031 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 56 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 06:33:45,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 281 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 06:33:45,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16274 states. [2023-04-02 06:33:48,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16274 to 16272. [2023-04-02 06:33:48,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16272 states, 16268 states have (on average 1.3967912466191297) internal successors, (22723), 16268 states have internal predecessors, (22723), 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 06:33:48,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16272 states to 16272 states and 22726 transitions. [2023-04-02 06:33:48,475 INFO L78 Accepts]: Start accepts. Automaton has 16272 states and 22726 transitions. Word has length 100 [2023-04-02 06:33:48,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:33:48,476 INFO L495 AbstractCegarLoop]: Abstraction has 16272 states and 22726 transitions. [2023-04-02 06:33:48,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:33:48,476 INFO L276 IsEmpty]: Start isEmpty. Operand 16272 states and 22726 transitions. [2023-04-02 06:33:48,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-02 06:33:48,479 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:33:48,479 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, 1, 1, 1, 1, 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 06:33:48,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-02 06:33:48,479 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:33:48,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:33:48,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1776007065, now seen corresponding path program 1 times [2023-04-02 06:33:48,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:33:48,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885334562] [2023-04-02 06:33:48,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:33:48,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:33:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:33:49,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:33:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:33:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:33:49,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:33:49,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885334562] [2023-04-02 06:33:49,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885334562] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 06:33:49,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268193597] [2023-04-02 06:33:49,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:33:49,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 06:33:49,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:33:49,121 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 06:33:49,153 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 06:33:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:33:49,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 06:33:49,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 06:33:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:33:50,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 06:33:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:33:51,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268193597] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 06:33:51,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 06:33:51,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 33 [2023-04-02 06:33:51,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924213975] [2023-04-02 06:33:51,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 06:33:51,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-02 06:33:51,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:33:51,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-02 06:33:51,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 06:33:51,612 INFO L87 Difference]: Start difference. First operand 16272 states and 22726 transitions. Second operand has 33 states, 33 states have (on average 8.484848484848484) internal successors, (280), 32 states have internal predecessors, (280), 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)