/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 06:50:07,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 06:50:07,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 06:50:07,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 06:50:07,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 06:50:07,833 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 06:50:07,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 06:50:07,838 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 06:50:07,840 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 06:50:07,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 06:50:07,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 06:50:07,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 06:50:07,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 06:50:07,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 06:50:07,850 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 06:50:07,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 06:50:07,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 06:50:07,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 06:50:07,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 06:50:07,858 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 06:50:07,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 06:50:07,860 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 06:50:07,861 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 06:50:07,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 06:50:07,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 06:50:07,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 06:50:07,873 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 06:50:07,874 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 06:50:07,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 06:50:07,876 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 06:50:07,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 06:50:07,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 06:50:07,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 06:50:07,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 06:50:07,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 06:50:07,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 06:50:07,879 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 06:50:07,904 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 06:50:07,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 06:50:07,905 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 06:50:07,905 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 06:50:07,906 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 06:50:07,907 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 06:50:07,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 06:50:07,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 06:50:07,907 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 06:50:07,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 06:50:07,908 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 06:50:07,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 06:50:07,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 06:50:07,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 06:50:07,909 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 06:50:07,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 06:50:07,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 06:50:07,909 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 06:50:07,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 06:50:07,909 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 06:50:07,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 06:50:07,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 06:50:07,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 06:50:07,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 06:50:07,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:50:07,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 06:50:07,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 06:50:07,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 06:50:07,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 06:50:07,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 06:50:07,910 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 06:50:07,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 06:50:07,911 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 06:50:07,911 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 06:50:07,911 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 06:50:07,911 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 06:50:08,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 06:50:08,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 06:50:08,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 06:50:08,155 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 06:50:08,155 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 06:50:08,156 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-02 06:50:09,394 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 06:50:09,674 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 06:50:09,675 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-02 06:50:09,684 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35b4bffc7/fd659a8a1b0145d89a8c78aa00f9860a/FLAGada3f3b2c [2023-04-02 06:50:09,699 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35b4bffc7/fd659a8a1b0145d89a8c78aa00f9860a [2023-04-02 06:50:09,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 06:50:09,703 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 06:50:09,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 06:50:09,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 06:50:09,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 06:50:09,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:50:09" (1/1) ... [2023-04-02 06:50:09,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74b46b8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:09, skipping insertion in model container [2023-04-02 06:50:09,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:50:09" (1/1) ... [2023-04-02 06:50:09,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 06:50:09,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 06:50:09,925 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7806,7819] [2023-04-02 06:50:09,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:50:09,998 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 06:50:10,066 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7806,7819] [2023-04-02 06:50:10,088 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:50:10,101 INFO L208 MainTranslator]: Completed translation [2023-04-02 06:50:10,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:10 WrapperNode [2023-04-02 06:50:10,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 06:50:10,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 06:50:10,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 06:50:10,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 06:50:10,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:10" (1/1) ... [2023-04-02 06:50:10,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:10" (1/1) ... [2023-04-02 06:50:10,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:10" (1/1) ... [2023-04-02 06:50:10,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:10" (1/1) ... [2023-04-02 06:50:10,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:10" (1/1) ... [2023-04-02 06:50:10,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:10" (1/1) ... [2023-04-02 06:50:10,146 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:10" (1/1) ... [2023-04-02 06:50:10,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:10" (1/1) ... [2023-04-02 06:50:10,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 06:50:10,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 06:50:10,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 06:50:10,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 06:50:10,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:10" (1/1) ... [2023-04-02 06:50:10,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:50:10,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:50:10,214 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 06:50:10,236 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 06:50:10,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 06:50:10,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 06:50:10,260 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 06:50:10,260 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 06:50:10,260 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 06:50:10,260 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 06:50:10,260 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 06:50:10,260 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 06:50:10,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 06:50:10,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 06:50:10,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 06:50:10,261 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 06:50:10,261 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 06:50:10,261 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 06:50:10,261 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 06:50:10,261 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 06:50:10,261 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 06:50:10,262 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 06:50:10,262 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 06:50:10,262 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 06:50:10,262 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 06:50:10,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 06:50:10,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 06:50:10,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 06:50:10,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 06:50:10,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 06:50:10,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 06:50:10,423 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 06:50:10,425 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 06:50:11,038 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 06:50:11,053 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 06:50:11,054 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 06:50:11,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:50:11 BoogieIcfgContainer [2023-04-02 06:50:11,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 06:50:11,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 06:50:11,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 06:50:11,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 06:50:11,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 06:50:09" (1/3) ... [2023-04-02 06:50:11,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1d5d95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:50:11, skipping insertion in model container [2023-04-02 06:50:11,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:50:10" (2/3) ... [2023-04-02 06:50:11,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1d5d95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:50:11, skipping insertion in model container [2023-04-02 06:50:11,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:50:11" (3/3) ... [2023-04-02 06:50:11,064 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-04-02 06:50:11,082 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 06:50:11,083 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 06:50:11,153 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 06:50:11,163 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;@512fbcf2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 06:50:11,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 06:50:11,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 160 states, 148 states have (on average 1.7567567567567568) internal successors, (260), 155 states have internal predecessors, (260), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 06:50:11,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-02 06:50:11,183 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:11,185 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 06:50:11,185 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:11,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:11,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1104708850, now seen corresponding path program 1 times [2023-04-02 06:50:11,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:11,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985461605] [2023-04-02 06:50:11,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:11,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:11,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:11,983 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 06:50:11,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:11,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985461605] [2023-04-02 06:50:11,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985461605] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:11,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:11,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:50:11,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513230738] [2023-04-02 06:50:11,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:11,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:50:11,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:12,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:50:12,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:50:12,031 INFO L87 Difference]: Start difference. First operand has 160 states, 148 states have (on average 1.7567567567567568) internal successors, (260), 155 states have internal predecessors, (260), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:12,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:12,959 INFO L93 Difference]: Finished difference Result 346 states and 554 transitions. [2023-04-02 06:50:12,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:50:12,961 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 06:50:12,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:12,970 INFO L225 Difference]: With dead ends: 346 [2023-04-02 06:50:12,971 INFO L226 Difference]: Without dead ends: 228 [2023-04-02 06:50:12,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:50:12,976 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 154 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:12,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 462 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:50:12,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-04-02 06:50:13,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 226. [2023-04-02 06:50:13,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 222 states have (on average 1.5225225225225225) internal successors, (338), 222 states have internal predecessors, (338), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:13,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 341 transitions. [2023-04-02 06:50:13,028 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 341 transitions. Word has length 66 [2023-04-02 06:50:13,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:13,028 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 341 transitions. [2023-04-02 06:50:13,029 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 06:50:13,029 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 341 transitions. [2023-04-02 06:50:13,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-02 06:50:13,031 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:13,031 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 06:50:13,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 06:50:13,032 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:13,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:13,033 INFO L85 PathProgramCache]: Analyzing trace with hash -783591345, now seen corresponding path program 1 times [2023-04-02 06:50:13,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:13,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343946225] [2023-04-02 06:50:13,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:13,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:13,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:13,400 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 06:50:13,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:13,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343946225] [2023-04-02 06:50:13,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343946225] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:13,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:13,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:50:13,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98493391] [2023-04-02 06:50:13,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:13,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:50:13,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:13,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:50:13,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:50:13,404 INFO L87 Difference]: Start difference. First operand 226 states and 341 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:14,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:14,064 INFO L93 Difference]: Finished difference Result 540 states and 837 transitions. [2023-04-02 06:50:14,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:50:14,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2023-04-02 06:50:14,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:14,075 INFO L225 Difference]: With dead ends: 540 [2023-04-02 06:50:14,076 INFO L226 Difference]: Without dead ends: 375 [2023-04-02 06:50:14,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:50:14,087 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 120 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:14,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 403 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:50:14,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-04-02 06:50:14,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 373. [2023-04-02 06:50:14,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 369 states have (on average 1.5420054200542006) internal successors, (569), 369 states have internal predecessors, (569), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:14,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 572 transitions. [2023-04-02 06:50:14,136 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 572 transitions. Word has length 68 [2023-04-02 06:50:14,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:14,137 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 572 transitions. [2023-04-02 06:50:14,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:14,137 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 572 transitions. [2023-04-02 06:50:14,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 06:50:14,146 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:14,146 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 06:50:14,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 06:50:14,146 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:14,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:14,147 INFO L85 PathProgramCache]: Analyzing trace with hash -279794224, now seen corresponding path program 1 times [2023-04-02 06:50:14,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:14,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783903871] [2023-04-02 06:50:14,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:14,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:14,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:14,442 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 06:50:14,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:14,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783903871] [2023-04-02 06:50:14,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783903871] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:14,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:14,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:50:14,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649092116] [2023-04-02 06:50:14,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:14,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:50:14,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:14,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:50:14,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:50:14,445 INFO L87 Difference]: Start difference. First operand 373 states and 572 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:15,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:15,012 INFO L93 Difference]: Finished difference Result 965 states and 1502 transitions. [2023-04-02 06:50:15,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:50:15,013 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 06:50:15,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:15,018 INFO L225 Difference]: With dead ends: 965 [2023-04-02 06:50:15,019 INFO L226 Difference]: Without dead ends: 653 [2023-04-02 06:50:15,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:50:15,027 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 114 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:15,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 404 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:50:15,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2023-04-02 06:50:15,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 651. [2023-04-02 06:50:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 647 states have (on average 1.5471406491499227) internal successors, (1001), 647 states have internal predecessors, (1001), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:15,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 1004 transitions. [2023-04-02 06:50:15,063 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 1004 transitions. Word has length 70 [2023-04-02 06:50:15,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:15,064 INFO L495 AbstractCegarLoop]: Abstraction has 651 states and 1004 transitions. [2023-04-02 06:50:15,064 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 06:50:15,064 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 1004 transitions. [2023-04-02 06:50:15,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-02 06:50:15,065 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:15,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:50:15,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 06:50:15,066 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:15,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:15,067 INFO L85 PathProgramCache]: Analyzing trace with hash -919561455, now seen corresponding path program 1 times [2023-04-02 06:50:15,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:15,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665986935] [2023-04-02 06:50:15,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:15,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:15,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:15,377 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 06:50:15,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:15,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665986935] [2023-04-02 06:50:15,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665986935] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:15,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:15,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:50:15,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800284946] [2023-04-02 06:50:15,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:15,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:50:15,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:15,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:50:15,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:50:15,380 INFO L87 Difference]: Start difference. First operand 651 states and 1004 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:16,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:16,132 INFO L93 Difference]: Finished difference Result 2789 states and 4394 transitions. [2023-04-02 06:50:16,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 06:50:16,133 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2023-04-02 06:50:16,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:16,143 INFO L225 Difference]: With dead ends: 2789 [2023-04-02 06:50:16,143 INFO L226 Difference]: Without dead ends: 2189 [2023-04-02 06:50:16,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-04-02 06:50:16,150 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 852 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:16,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 1528 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:50:16,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2023-04-02 06:50:16,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 1146. [2023-04-02 06:50:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1142 states have (on average 1.5674255691768826) internal successors, (1790), 1142 states have internal predecessors, (1790), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:16,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 1793 transitions. [2023-04-02 06:50:16,232 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 1793 transitions. Word has length 72 [2023-04-02 06:50:16,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:16,233 INFO L495 AbstractCegarLoop]: Abstraction has 1146 states and 1793 transitions. [2023-04-02 06:50:16,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:16,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 1793 transitions. [2023-04-02 06:50:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-04-02 06:50:16,235 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:16,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:50:16,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 06:50:16,236 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:16,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:16,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1496755519, now seen corresponding path program 1 times [2023-04-02 06:50:16,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:16,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957915812] [2023-04-02 06:50:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:16,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:16,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:16,477 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 06:50:16,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:16,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957915812] [2023-04-02 06:50:16,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957915812] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:16,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:16,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:50:16,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284210279] [2023-04-02 06:50:16,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:16,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 06:50:16,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:16,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 06:50:16,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:50:16,479 INFO L87 Difference]: Start difference. First operand 1146 states and 1793 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:17,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:17,183 INFO L93 Difference]: Finished difference Result 3329 states and 5259 transitions. [2023-04-02 06:50:17,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 06:50:17,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2023-04-02 06:50:17,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:17,192 INFO L225 Difference]: With dead ends: 3329 [2023-04-02 06:50:17,192 INFO L226 Difference]: Without dead ends: 2244 [2023-04-02 06:50:17,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:50:17,195 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 409 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:17,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 654 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:50:17,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2023-04-02 06:50:17,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1683. [2023-04-02 06:50:17,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1679 states have (on average 1.5687909469922574) internal successors, (2634), 1679 states have internal predecessors, (2634), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:17,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 2637 transitions. [2023-04-02 06:50:17,303 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 2637 transitions. Word has length 73 [2023-04-02 06:50:17,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:17,304 INFO L495 AbstractCegarLoop]: Abstraction has 1683 states and 2637 transitions. [2023-04-02 06:50:17,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:17,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 2637 transitions. [2023-04-02 06:50:17,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-02 06:50:17,306 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:17,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:50:17,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 06:50:17,306 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:17,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:17,307 INFO L85 PathProgramCache]: Analyzing trace with hash -119141412, now seen corresponding path program 1 times [2023-04-02 06:50:17,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:17,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548501860] [2023-04-02 06:50:17,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:17,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:17,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:17,537 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 06:50:17,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:17,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548501860] [2023-04-02 06:50:17,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548501860] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:17,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:17,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:50:17,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830896832] [2023-04-02 06:50:17,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:17,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:50:17,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:17,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:50:17,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:50:17,539 INFO L87 Difference]: Start difference. First operand 1683 states and 2637 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:18,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:18,449 INFO L93 Difference]: Finished difference Result 3678 states and 5777 transitions. [2023-04-02 06:50:18,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:50:18,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2023-04-02 06:50:18,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:18,461 INFO L225 Difference]: With dead ends: 3678 [2023-04-02 06:50:18,462 INFO L226 Difference]: Without dead ends: 2520 [2023-04-02 06:50:18,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:50:18,468 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 127 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:18,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 496 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:50:18,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2023-04-02 06:50:18,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 2518. [2023-04-02 06:50:18,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2518 states, 2514 states have (on average 1.558472553699284) internal successors, (3918), 2514 states have internal predecessors, (3918), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:18,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2518 states to 2518 states and 3921 transitions. [2023-04-02 06:50:18,686 INFO L78 Accepts]: Start accepts. Automaton has 2518 states and 3921 transitions. Word has length 74 [2023-04-02 06:50:18,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:18,687 INFO L495 AbstractCegarLoop]: Abstraction has 2518 states and 3921 transitions. [2023-04-02 06:50:18,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:18,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2518 states and 3921 transitions. [2023-04-02 06:50:18,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-02 06:50:18,692 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:18,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:50:18,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 06:50:18,693 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:18,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:18,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1850365865, now seen corresponding path program 1 times [2023-04-02 06:50:18,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:18,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634706974] [2023-04-02 06:50:18,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:18,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:18,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:18,928 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 06:50:18,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:18,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634706974] [2023-04-02 06:50:18,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634706974] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:18,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:18,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:50:18,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523448147] [2023-04-02 06:50:18,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:18,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:50:18,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:18,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:50:18,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:50:18,931 INFO L87 Difference]: Start difference. First operand 2518 states and 3921 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:19,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:19,818 INFO L93 Difference]: Finished difference Result 4878 states and 7604 transitions. [2023-04-02 06:50:19,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:50:19,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2023-04-02 06:50:19,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:19,833 INFO L225 Difference]: With dead ends: 4878 [2023-04-02 06:50:19,833 INFO L226 Difference]: Without dead ends: 3486 [2023-04-02 06:50:19,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:50:19,840 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 121 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:19,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 478 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:50:19,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2023-04-02 06:50:20,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 3484. [2023-04-02 06:50:20,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3484 states, 3480 states have (on average 1.5459770114942528) internal successors, (5380), 3480 states have internal predecessors, (5380), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:20,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3484 states to 3484 states and 5383 transitions. [2023-04-02 06:50:20,115 INFO L78 Accepts]: Start accepts. Automaton has 3484 states and 5383 transitions. Word has length 74 [2023-04-02 06:50:20,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:20,115 INFO L495 AbstractCegarLoop]: Abstraction has 3484 states and 5383 transitions. [2023-04-02 06:50:20,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:20,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3484 states and 5383 transitions. [2023-04-02 06:50:20,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-02 06:50:20,116 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:20,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:50:20,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 06:50:20,117 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:20,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:20,118 INFO L85 PathProgramCache]: Analyzing trace with hash -742056249, now seen corresponding path program 1 times [2023-04-02 06:50:20,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:20,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059859219] [2023-04-02 06:50:20,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:20,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:20,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:20,368 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 06:50:20,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:20,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059859219] [2023-04-02 06:50:20,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059859219] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:20,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:20,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:50:20,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046424900] [2023-04-02 06:50:20,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:20,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:50:20,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:20,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:50:20,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:50:20,370 INFO L87 Difference]: Start difference. First operand 3484 states and 5383 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:21,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:21,347 INFO L93 Difference]: Finished difference Result 6654 states and 10284 transitions. [2023-04-02 06:50:21,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:50:21,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2023-04-02 06:50:21,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:21,366 INFO L225 Difference]: With dead ends: 6654 [2023-04-02 06:50:21,366 INFO L226 Difference]: Without dead ends: 4747 [2023-04-02 06:50:21,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:50:21,373 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 115 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:21,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 455 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:50:21,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4747 states. [2023-04-02 06:50:21,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4747 to 4745. [2023-04-02 06:50:21,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4745 states, 4741 states have (on average 1.5304788019405189) internal successors, (7256), 4741 states have internal predecessors, (7256), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:21,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4745 states to 4745 states and 7259 transitions. [2023-04-02 06:50:21,748 INFO L78 Accepts]: Start accepts. Automaton has 4745 states and 7259 transitions. Word has length 74 [2023-04-02 06:50:21,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:21,749 INFO L495 AbstractCegarLoop]: Abstraction has 4745 states and 7259 transitions. [2023-04-02 06:50:21,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:21,749 INFO L276 IsEmpty]: Start isEmpty. Operand 4745 states and 7259 transitions. [2023-04-02 06:50:21,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-02 06:50:21,750 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:21,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:50:21,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 06:50:21,750 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:21,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:21,751 INFO L85 PathProgramCache]: Analyzing trace with hash 918138323, now seen corresponding path program 1 times [2023-04-02 06:50:21,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:21,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943780026] [2023-04-02 06:50:21,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:21,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:22,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:22,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:22,254 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 06:50:22,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:22,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943780026] [2023-04-02 06:50:22,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943780026] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:22,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:22,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:50:22,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992188268] [2023-04-02 06:50:22,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:22,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:50:22,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:22,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:50:22,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:50:22,260 INFO L87 Difference]: Start difference. First operand 4745 states and 7259 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:23,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:23,415 INFO L93 Difference]: Finished difference Result 7907 states and 12006 transitions. [2023-04-02 06:50:23,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:50:23,416 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2023-04-02 06:50:23,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:23,465 INFO L225 Difference]: With dead ends: 7907 [2023-04-02 06:50:23,465 INFO L226 Difference]: Without dead ends: 7905 [2023-04-02 06:50:23,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:50:23,470 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 260 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:23,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 1038 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:50:23,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7905 states. [2023-04-02 06:50:23,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7905 to 4849. [2023-04-02 06:50:23,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4849 states, 4845 states have (on average 1.5135190918472652) internal successors, (7333), 4845 states have internal predecessors, (7333), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:23,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4849 states to 4849 states and 7336 transitions. [2023-04-02 06:50:23,961 INFO L78 Accepts]: Start accepts. Automaton has 4849 states and 7336 transitions. Word has length 81 [2023-04-02 06:50:23,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:23,961 INFO L495 AbstractCegarLoop]: Abstraction has 4849 states and 7336 transitions. [2023-04-02 06:50:23,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 5 states have internal predecessors, (78), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:23,962 INFO L276 IsEmpty]: Start isEmpty. Operand 4849 states and 7336 transitions. [2023-04-02 06:50:23,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-02 06:50:23,964 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:23,964 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:50:23,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 06:50:23,964 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:23,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:23,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1957580253, now seen corresponding path program 1 times [2023-04-02 06:50:23,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:23,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177134461] [2023-04-02 06:50:23,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:23,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:24,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:50:24,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:24,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177134461] [2023-04-02 06:50:24,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177134461] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:24,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:24,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:50:24,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157127321] [2023-04-02 06:50:24,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:24,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:50:24,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:24,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:50:24,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:50:24,223 INFO L87 Difference]: Start difference. First operand 4849 states and 7336 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:25,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:25,321 INFO L93 Difference]: Finished difference Result 10728 states and 16284 transitions. [2023-04-02 06:50:25,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:50:25,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2023-04-02 06:50:25,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:25,340 INFO L225 Difference]: With dead ends: 10728 [2023-04-02 06:50:25,340 INFO L226 Difference]: Without dead ends: 8710 [2023-04-02 06:50:25,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:50:25,346 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 105 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:25,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 395 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:50:25,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8710 states. [2023-04-02 06:50:26,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8710 to 8708. [2023-04-02 06:50:26,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8708 states, 8704 states have (on average 1.5139016544117647) internal successors, (13177), 8704 states have internal predecessors, (13177), 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 06:50:26,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8708 states to 8708 states and 13180 transitions. [2023-04-02 06:50:26,128 INFO L78 Accepts]: Start accepts. Automaton has 8708 states and 13180 transitions. Word has length 105 [2023-04-02 06:50:26,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:26,129 INFO L495 AbstractCegarLoop]: Abstraction has 8708 states and 13180 transitions. [2023-04-02 06:50:26,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:26,129 INFO L276 IsEmpty]: Start isEmpty. Operand 8708 states and 13180 transitions. [2023-04-02 06:50:26,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-02 06:50:26,131 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:26,132 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:50:26,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 06:50:26,132 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:26,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:26,133 INFO L85 PathProgramCache]: Analyzing trace with hash -367879766, now seen corresponding path program 1 times [2023-04-02 06:50:26,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:26,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364342147] [2023-04-02 06:50:26,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:26,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:26,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 06:50:26,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:26,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364342147] [2023-04-02 06:50:26,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364342147] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:26,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:26,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:50:26,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534008447] [2023-04-02 06:50:26,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:26,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:50:26,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:26,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:50:26,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:50:26,466 INFO L87 Difference]: Start difference. First operand 8708 states and 13180 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 5 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:28,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:28,644 INFO L93 Difference]: Finished difference Result 25791 states and 39046 transitions. [2023-04-02 06:50:28,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:50:28,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 5 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2023-04-02 06:50:28,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:28,700 INFO L225 Difference]: With dead ends: 25791 [2023-04-02 06:50:28,700 INFO L226 Difference]: Without dead ends: 19963 [2023-04-02 06:50:28,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:50:28,717 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 515 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:28,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 1039 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:50:28,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19963 states. [2023-04-02 06:50:29,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19963 to 14350. [2023-04-02 06:50:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14350 states, 14346 states have (on average 1.5101073469956783) internal successors, (21664), 14346 states have internal predecessors, (21664), 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 06:50:29,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14350 states to 14350 states and 21667 transitions. [2023-04-02 06:50:29,921 INFO L78 Accepts]: Start accepts. Automaton has 14350 states and 21667 transitions. Word has length 105 [2023-04-02 06:50:29,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:29,921 INFO L495 AbstractCegarLoop]: Abstraction has 14350 states and 21667 transitions. [2023-04-02 06:50:29,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 5 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:29,921 INFO L276 IsEmpty]: Start isEmpty. Operand 14350 states and 21667 transitions. [2023-04-02 06:50:29,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-04-02 06:50:29,923 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:29,924 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:50:29,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 06:50:29,924 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:29,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:29,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1334665416, now seen corresponding path program 1 times [2023-04-02 06:50:29,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:29,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514362137] [2023-04-02 06:50:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:29,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:30,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:30,222 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 06:50:30,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:30,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514362137] [2023-04-02 06:50:30,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514362137] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:30,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:30,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:50:30,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865012668] [2023-04-02 06:50:30,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:30,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:50:30,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:30,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:50:30,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:50:30,224 INFO L87 Difference]: Start difference. First operand 14350 states and 21667 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:32,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:32,740 INFO L93 Difference]: Finished difference Result 29231 states and 44217 transitions. [2023-04-02 06:50:32,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:50:32,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2023-04-02 06:50:32,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:32,810 INFO L225 Difference]: With dead ends: 29231 [2023-04-02 06:50:32,810 INFO L226 Difference]: Without dead ends: 23403 [2023-04-02 06:50:32,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:50:32,836 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 524 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:32,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 1027 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:50:32,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23403 states. [2023-04-02 06:50:34,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23403 to 21660. [2023-04-02 06:50:34,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21660 states, 21656 states have (on average 1.5077576653121536) internal successors, (32652), 21656 states have internal predecessors, (32652), 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 06:50:34,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21660 states to 21660 states and 32655 transitions. [2023-04-02 06:50:34,654 INFO L78 Accepts]: Start accepts. Automaton has 21660 states and 32655 transitions. Word has length 105 [2023-04-02 06:50:34,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:34,654 INFO L495 AbstractCegarLoop]: Abstraction has 21660 states and 32655 transitions. [2023-04-02 06:50:34,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:34,655 INFO L276 IsEmpty]: Start isEmpty. Operand 21660 states and 32655 transitions. [2023-04-02 06:50:34,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-02 06:50:34,658 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:34,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:50:34,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 06:50:34,659 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:34,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:34,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1084778436, now seen corresponding path program 1 times [2023-04-02 06:50:34,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:34,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243079383] [2023-04-02 06:50:34,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:34,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:34,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:50:34,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:34,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243079383] [2023-04-02 06:50:34,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243079383] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:34,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:34,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:50:34,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471085075] [2023-04-02 06:50:34,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:34,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:50:34,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:34,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:50:34,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:50:34,881 INFO L87 Difference]: Start difference. First operand 21660 states and 32655 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:38,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:38,892 INFO L93 Difference]: Finished difference Result 63479 states and 95514 transitions. [2023-04-02 06:50:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:50:38,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2023-04-02 06:50:38,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:38,992 INFO L225 Difference]: With dead ends: 63479 [2023-04-02 06:50:38,993 INFO L226 Difference]: Without dead ends: 41914 [2023-04-02 06:50:39,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:50:39,051 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 166 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:39,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 531 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:50:39,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41914 states. [2023-04-02 06:50:42,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41914 to 41912. [2023-04-02 06:50:42,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41912 states, 41908 states have (on average 1.4927698768731508) internal successors, (62559), 41908 states have internal predecessors, (62559), 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 06:50:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41912 states to 41912 states and 62562 transitions. [2023-04-02 06:50:42,935 INFO L78 Accepts]: Start accepts. Automaton has 41912 states and 62562 transitions. Word has length 106 [2023-04-02 06:50:42,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:42,936 INFO L495 AbstractCegarLoop]: Abstraction has 41912 states and 62562 transitions. [2023-04-02 06:50:42,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:42,936 INFO L276 IsEmpty]: Start isEmpty. Operand 41912 states and 62562 transitions. [2023-04-02 06:50:42,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-02 06:50:42,941 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:42,941 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:50:42,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 06:50:42,941 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:42,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:42,942 INFO L85 PathProgramCache]: Analyzing trace with hash 433698980, now seen corresponding path program 1 times [2023-04-02 06:50:42,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:42,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092942485] [2023-04-02 06:50:42,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:42,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:43,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:50:43,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:43,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092942485] [2023-04-02 06:50:43,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092942485] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:43,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:43,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:50:43,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477030679] [2023-04-02 06:50:43,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:43,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 06:50:43,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:43,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 06:50:43,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:50:43,260 INFO L87 Difference]: Start difference. First operand 41912 states and 62562 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:47,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:47,779 INFO L93 Difference]: Finished difference Result 66764 states and 99995 transitions. [2023-04-02 06:50:47,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 06:50:47,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2023-04-02 06:50:47,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:47,872 INFO L225 Difference]: With dead ends: 66764 [2023-04-02 06:50:47,873 INFO L226 Difference]: Without dead ends: 44848 [2023-04-02 06:50:47,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:50:47,923 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 228 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:47,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 692 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:50:47,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44848 states. [2023-04-02 06:50:50,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44848 to 27950. [2023-04-02 06:50:50,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27950 states, 27946 states have (on average 1.4884777785729622) internal successors, (41597), 27946 states have internal predecessors, (41597), 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 06:50:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27950 states to 27950 states and 41600 transitions. [2023-04-02 06:50:50,881 INFO L78 Accepts]: Start accepts. Automaton has 27950 states and 41600 transitions. Word has length 106 [2023-04-02 06:50:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:50:50,882 INFO L495 AbstractCegarLoop]: Abstraction has 27950 states and 41600 transitions. [2023-04-02 06:50:50,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:50,882 INFO L276 IsEmpty]: Start isEmpty. Operand 27950 states and 41600 transitions. [2023-04-02 06:50:50,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-02 06:50:50,885 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:50:50,885 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:50:50,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-02 06:50:50,886 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:50:50,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:50:50,886 INFO L85 PathProgramCache]: Analyzing trace with hash 413691718, now seen corresponding path program 1 times [2023-04-02 06:50:50,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:50:50,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806941471] [2023-04-02 06:50:50,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:50:50,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:50:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:51,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:50:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:50:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:50:51,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:50:51,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806941471] [2023-04-02 06:50:51,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806941471] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:50:51,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:50:51,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:50:51,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929454602] [2023-04-02 06:50:51,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:50:51,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:50:51,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:50:51,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:50:51,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:50:51,136 INFO L87 Difference]: Start difference. First operand 27950 states and 41600 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:50:56,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:50:56,857 INFO L93 Difference]: Finished difference Result 81816 states and 121492 transitions. [2023-04-02 06:50:56,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:50:56,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2023-04-02 06:50:56,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:50:56,953 INFO L225 Difference]: With dead ends: 81816 [2023-04-02 06:50:56,953 INFO L226 Difference]: Without dead ends: 54011 [2023-04-02 06:50:57,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:50:57,002 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 147 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:50:57,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 495 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:50:57,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54011 states. [2023-04-02 06:51:02,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54011 to 54009. [2023-04-02 06:51:02,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54009 states, 54005 states have (on average 1.4724192204425517) internal successors, (79518), 54005 states have internal predecessors, (79518), 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 06:51:02,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54009 states to 54009 states and 79521 transitions. [2023-04-02 06:51:02,836 INFO L78 Accepts]: Start accepts. Automaton has 54009 states and 79521 transitions. Word has length 106 [2023-04-02 06:51:02,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:02,836 INFO L495 AbstractCegarLoop]: Abstraction has 54009 states and 79521 transitions. [2023-04-02 06:51:02,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:51:02,836 INFO L276 IsEmpty]: Start isEmpty. Operand 54009 states and 79521 transitions. [2023-04-02 06:51:02,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-02 06:51:02,843 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:02,843 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:51:02,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-02 06:51:02,843 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:02,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:02,844 INFO L85 PathProgramCache]: Analyzing trace with hash 171971568, now seen corresponding path program 1 times [2023-04-02 06:51:02,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:02,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40734018] [2023-04-02 06:51:02,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:02,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:03,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 06:51:03,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:03,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40734018] [2023-04-02 06:51:03,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40734018] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:03,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:03,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:51:03,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79650908] [2023-04-02 06:51:03,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:03,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:51:03,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:03,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:51:03,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:51:03,098 INFO L87 Difference]: Start difference. First operand 54009 states and 79521 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 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 06:51:11,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:51:11,522 INFO L93 Difference]: Finished difference Result 128943 states and 190673 transitions. [2023-04-02 06:51:11,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:51:11,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2023-04-02 06:51:11,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:51:11,665 INFO L225 Difference]: With dead ends: 128943 [2023-04-02 06:51:11,665 INFO L226 Difference]: Without dead ends: 75213 [2023-04-02 06:51:11,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:51:11,724 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 123 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:51:11,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 420 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:51:11,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75213 states. [2023-04-02 06:51:19,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75213 to 73131. [2023-04-02 06:51:19,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73131 states, 73127 states have (on average 1.4603634772382295) internal successors, (106792), 73127 states have internal predecessors, (106792), 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 06:51:19,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73131 states to 73131 states and 106795 transitions. [2023-04-02 06:51:19,618 INFO L78 Accepts]: Start accepts. Automaton has 73131 states and 106795 transitions. Word has length 107 [2023-04-02 06:51:19,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:19,619 INFO L495 AbstractCegarLoop]: Abstraction has 73131 states and 106795 transitions. [2023-04-02 06:51:19,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 3 states have internal predecessors, (94), 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 06:51:19,619 INFO L276 IsEmpty]: Start isEmpty. Operand 73131 states and 106795 transitions. [2023-04-02 06:51:19,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-02 06:51:19,624 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:19,625 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:51:19,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-02 06:51:19,625 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:19,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:19,625 INFO L85 PathProgramCache]: Analyzing trace with hash 704609504, now seen corresponding path program 1 times [2023-04-02 06:51:19,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:19,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99435731] [2023-04-02 06:51:19,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:19,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:19,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:19,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:19,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 06:51:19,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:19,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99435731] [2023-04-02 06:51:19,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99435731] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:19,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:19,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:51:19,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833464292] [2023-04-02 06:51:19,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:19,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:51:19,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:19,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:51:19,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:51:19,869 INFO L87 Difference]: Start difference. First operand 73131 states and 106795 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 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 06:51:31,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:51:31,167 INFO L93 Difference]: Finished difference Result 174755 states and 256329 transitions. [2023-04-02 06:51:31,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:51:31,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2023-04-02 06:51:31,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:51:31,401 INFO L225 Difference]: With dead ends: 174755 [2023-04-02 06:51:31,401 INFO L226 Difference]: Without dead ends: 101927 [2023-04-02 06:51:31,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:51:31,472 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 117 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:51:31,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 424 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:51:31,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101927 states. [2023-04-02 06:51:42,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101927 to 99025. [2023-04-02 06:51:42,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99025 states, 99021 states have (on average 1.4476929136243828) internal successors, (143352), 99021 states have internal predecessors, (143352), 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 06:51:42,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99025 states to 99025 states and 143355 transitions. [2023-04-02 06:51:42,658 INFO L78 Accepts]: Start accepts. Automaton has 99025 states and 143355 transitions. Word has length 107 [2023-04-02 06:51:42,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:51:42,659 INFO L495 AbstractCegarLoop]: Abstraction has 99025 states and 143355 transitions. [2023-04-02 06:51:42,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 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 06:51:42,659 INFO L276 IsEmpty]: Start isEmpty. Operand 99025 states and 143355 transitions. [2023-04-02 06:51:42,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-02 06:51:42,663 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:51:42,664 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:51:42,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-02 06:51:42,664 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:51:42,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:51:42,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1143069472, now seen corresponding path program 1 times [2023-04-02 06:51:42,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:51:42,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492355953] [2023-04-02 06:51:42,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:51:42,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:51:42,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:42,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:51:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:51:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:51:42,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:51:42,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492355953] [2023-04-02 06:51:42,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492355953] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:51:42,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:51:42,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:51:42,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849308173] [2023-04-02 06:51:42,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:51:42,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:51:42,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:51:42,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:51:42,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:51:42,949 INFO L87 Difference]: Start difference. First operand 99025 states and 143355 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:51:53,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:51:53,940 INFO L93 Difference]: Finished difference Result 186479 states and 270229 transitions. [2023-04-02 06:51:53,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:51:53,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2023-04-02 06:51:53,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:51:54,244 INFO L225 Difference]: With dead ends: 186479 [2023-04-02 06:51:54,244 INFO L226 Difference]: Without dead ends: 87757 [2023-04-02 06:51:54,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:51:54,348 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 90 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:51:54,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 458 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:51:54,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87757 states. [2023-04-02 06:52:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87757 to 87731. [2023-04-02 06:52:03,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87731 states, 87727 states have (on average 1.4398759788890536) internal successors, (126316), 87727 states have internal predecessors, (126316), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:52:04,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87731 states to 87731 states and 126319 transitions. [2023-04-02 06:52:04,257 INFO L78 Accepts]: Start accepts. Automaton has 87731 states and 126319 transitions. Word has length 107 [2023-04-02 06:52:04,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:52:04,258 INFO L495 AbstractCegarLoop]: Abstraction has 87731 states and 126319 transitions. [2023-04-02 06:52:04,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:52:04,258 INFO L276 IsEmpty]: Start isEmpty. Operand 87731 states and 126319 transitions. [2023-04-02 06:52:04,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-04-02 06:52:04,261 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:52:04,261 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:52:04,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-04-02 06:52:04,262 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:52:04,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:52:04,262 INFO L85 PathProgramCache]: Analyzing trace with hash 725196719, now seen corresponding path program 1 times [2023-04-02 06:52:04,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:52:04,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539439042] [2023-04-02 06:52:04,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:52:04,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:52:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:04,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:52:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:52:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 06:52:04,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:52:04,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539439042] [2023-04-02 06:52:04,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539439042] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:52:04,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:52:04,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:52:04,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530632193] [2023-04-02 06:52:04,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:52:04,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 06:52:04,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:52:04,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 06:52:04,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:52:04,713 INFO L87 Difference]: Start difference. First operand 87731 states and 126319 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)