/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_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 05:53:57,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 05:53:57,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 05:53:57,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 05:53:57,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 05:53:57,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 05:53:57,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 05:53:57,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 05:53:57,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 05:53:57,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 05:53:57,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 05:53:57,201 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 05:53:57,201 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 05:53:57,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 05:53:57,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 05:53:57,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 05:53:57,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 05:53:57,207 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 05:53:57,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 05:53:57,213 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 05:53:57,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 05:53:57,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 05:53:57,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 05:53:57,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 05:53:57,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 05:53:57,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 05:53:57,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 05:53:57,230 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 05:53:57,231 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 05:53:57,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 05:53:57,232 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 05:53:57,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 05:53:57,232 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 05:53:57,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 05:53:57,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 05:53:57,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 05:53:57,235 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 05:53:57,263 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 05:53:57,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 05:53:57,264 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 05:53:57,264 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 05:53:57,265 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 05:53:57,265 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 05:53:57,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 05:53:57,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 05:53:57,266 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 05:53:57,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 05:53:57,267 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 05:53:57,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 05:53:57,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 05:53:57,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 05:53:57,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 05:53:57,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 05:53:57,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 05:53:57,268 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 05:53:57,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 05:53:57,269 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 05:53:57,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 05:53:57,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 05:53:57,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 05:53:57,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 05:53:57,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 05:53:57,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 05:53:57,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 05:53:57,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 05:53:57,270 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 05:53:57,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 05:53:57,270 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 05:53:57,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 05:53:57,271 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 05:53:57,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 05:53:57,271 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 05:53:57,271 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 05:53:57,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 05:53:57,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 05:53:57,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 05:53:57,528 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 05:53:57,528 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 05:53:57,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 05:53:58,709 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 05:53:58,974 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 05:53:58,974 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 05:53:58,986 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61decbc59/80d967fe839642118cb97299e13b14a2/FLAGb35eae9ad [2023-04-02 05:53:58,998 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61decbc59/80d967fe839642118cb97299e13b14a2 [2023-04-02 05:53:59,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 05:53:59,002 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 05:53:59,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 05:53:59,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 05:53:59,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 05:53:59,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 05:53:58" (1/1) ... [2023-04-02 05:53:59,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@276c9894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:53:59, skipping insertion in model container [2023-04-02 05:53:59,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 05:53:58" (1/1) ... [2023-04-02 05:53:59,013 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 05:53:59,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 05:53:59,389 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_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12986,12999] [2023-04-02 05:53:59,465 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 05:53:59,490 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 05:53:59,565 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_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12986,12999] [2023-04-02 05:53:59,596 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 05:53:59,612 INFO L208 MainTranslator]: Completed translation [2023-04-02 05:53:59,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:53:59 WrapperNode [2023-04-02 05:53:59,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 05:53:59,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 05:53:59,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 05:53:59,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 05:53:59,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:53:59" (1/1) ... [2023-04-02 05:53:59,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:53:59" (1/1) ... [2023-04-02 05:53:59,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:53:59" (1/1) ... [2023-04-02 05:53:59,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:53:59" (1/1) ... [2023-04-02 05:53:59,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:53:59" (1/1) ... [2023-04-02 05:53:59,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:53:59" (1/1) ... [2023-04-02 05:53:59,702 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:53:59" (1/1) ... [2023-04-02 05:53:59,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:53:59" (1/1) ... [2023-04-02 05:53:59,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 05:53:59,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 05:53:59,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 05:53:59,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 05:53:59,715 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:53:59" (1/1) ... [2023-04-02 05:53:59,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 05:53:59,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 05:53:59,762 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 05:53:59,788 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 05:53:59,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 05:53:59,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 05:53:59,810 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 05:53:59,810 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 05:53:59,810 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 05:53:59,810 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 05:53:59,810 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 05:53:59,810 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 05:53:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 05:53:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 05:53:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-02 05:53:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 05:53:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 05:53:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 05:53:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 05:53:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 05:53:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 05:53:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 05:53:59,811 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 05:53:59,812 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-02 05:53:59,812 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 05:53:59,812 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 05:53:59,812 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 05:53:59,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 05:53:59,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 05:53:59,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 05:53:59,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 05:53:59,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 05:53:59,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 05:54:00,024 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 05:54:00,027 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 05:54:00,896 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 05:54:00,912 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 05:54:00,913 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 05:54:00,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 05:54:00 BoogieIcfgContainer [2023-04-02 05:54:00,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 05:54:00,920 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 05:54:00,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 05:54:00,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 05:54:00,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 05:53:58" (1/3) ... [2023-04-02 05:54:00,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61fbd6b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 05:54:00, skipping insertion in model container [2023-04-02 05:54:00,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 05:53:59" (2/3) ... [2023-04-02 05:54:00,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61fbd6b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 05:54:00, skipping insertion in model container [2023-04-02 05:54:00,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 05:54:00" (3/3) ... [2023-04-02 05:54:00,928 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 05:54:00,944 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 05:54:00,944 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 05:54:00,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 05:54:01,004 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;@67df3c75, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 05:54:01,005 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 05:54:01,013 INFO L276 IsEmpty]: Start isEmpty. Operand has 338 states, 325 states have (on average 1.7938461538461539) internal successors, (583), 333 states have internal predecessors, (583), 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 05:54:01,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-02 05:54:01,028 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:54:01,029 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:54:01,029 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:54:01,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:54:01,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1650105281, now seen corresponding path program 1 times [2023-04-02 05:54:01,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:54:01,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896764771] [2023-04-02 05:54:01,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:54:01,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:54:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:02,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:54:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:02,128 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 05:54:02,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:54:02,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896764771] [2023-04-02 05:54:02,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896764771] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:54:02,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:54:02,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:54:02,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944103] [2023-04-02 05:54:02,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:54:02,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:54:02,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:54:02,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:54:02,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:54:02,177 INFO L87 Difference]: Start difference. First operand has 338 states, 325 states have (on average 1.7938461538461539) internal successors, (583), 333 states have internal predecessors, (583), 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 27.75) internal successors, (111), 3 states have internal predecessors, (111), 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 05:54:04,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:54:04,185 INFO L93 Difference]: Finished difference Result 615 states and 1028 transitions. [2023-04-02 05:54:04,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:54:04,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 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 114 [2023-04-02 05:54:04,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:54:04,210 INFO L225 Difference]: With dead ends: 615 [2023-04-02 05:54:04,210 INFO L226 Difference]: Without dead ends: 449 [2023-04-02 05:54:04,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:54:04,224 INFO L413 NwaCegarLoop]: 581 mSDtfsCounter, 236 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-02 05:54:04,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 1085 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-02 05:54:04,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2023-04-02 05:54:04,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 446. [2023-04-02 05:54:04,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 442 states have (on average 1.6312217194570136) internal successors, (721), 442 states have internal predecessors, (721), 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 05:54:04,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 724 transitions. [2023-04-02 05:54:04,299 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 724 transitions. Word has length 114 [2023-04-02 05:54:04,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:54:04,300 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 724 transitions. [2023-04-02 05:54:04,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 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 05:54:04,300 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 724 transitions. [2023-04-02 05:54:04,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-04-02 05:54:04,304 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:54:04,305 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:54:04,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 05:54:04,305 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:54:04,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:54:04,306 INFO L85 PathProgramCache]: Analyzing trace with hash -11080597, now seen corresponding path program 1 times [2023-04-02 05:54:04,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:54:04,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126580537] [2023-04-02 05:54:04,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:54:04,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:54:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:04,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:54:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:04,833 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 05:54:04,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:54:04,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126580537] [2023-04-02 05:54:04,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126580537] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:54:04,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:54:04,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:54:04,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032529717] [2023-04-02 05:54:04,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:54:04,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:54:04,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:54:04,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:54:04,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:54:04,838 INFO L87 Difference]: Start difference. First operand 446 states and 724 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 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 05:54:06,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:54:06,264 INFO L93 Difference]: Finished difference Result 934 states and 1512 transitions. [2023-04-02 05:54:06,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:54:06,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 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 117 [2023-04-02 05:54:06,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:54:06,269 INFO L225 Difference]: With dead ends: 934 [2023-04-02 05:54:06,269 INFO L226 Difference]: Without dead ends: 681 [2023-04-02 05:54:06,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:54:06,272 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 194 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-02 05:54:06,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 1014 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-02 05:54:06,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2023-04-02 05:54:06,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 677. [2023-04-02 05:54:06,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 673 states have (on average 1.6210995542347697) internal successors, (1091), 673 states have internal predecessors, (1091), 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 05:54:06,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 1094 transitions. [2023-04-02 05:54:06,314 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 1094 transitions. Word has length 117 [2023-04-02 05:54:06,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:54:06,315 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 1094 transitions. [2023-04-02 05:54:06,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 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 05:54:06,315 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 1094 transitions. [2023-04-02 05:54:06,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-04-02 05:54:06,319 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:54:06,319 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:54:06,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 05:54:06,320 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:54:06,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:54:06,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1787200349, now seen corresponding path program 1 times [2023-04-02 05:54:06,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:54:06,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583746813] [2023-04-02 05:54:06,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:54:06,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:54:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:06,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:54:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:06,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 05:54:06,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:54:06,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583746813] [2023-04-02 05:54:06,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583746813] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:54:06,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:54:06,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:54:06,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152445925] [2023-04-02 05:54:06,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:54:06,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:54:06,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:54:06,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:54:06,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:54:06,740 INFO L87 Difference]: Start difference. First operand 677 states and 1094 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 3 states have internal predecessors, (117), 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 05:54:08,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:54:08,150 INFO L93 Difference]: Finished difference Result 1609 states and 2588 transitions. [2023-04-02 05:54:08,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:54:08,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 3 states have internal predecessors, (117), 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 120 [2023-04-02 05:54:08,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:54:08,156 INFO L225 Difference]: With dead ends: 1609 [2023-04-02 05:54:08,157 INFO L226 Difference]: Without dead ends: 1125 [2023-04-02 05:54:08,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:54:08,159 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 188 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 05:54:08,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 1015 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 05:54:08,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2023-04-02 05:54:08,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1119. [2023-04-02 05:54:08,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1115 states have (on average 1.6062780269058297) internal successors, (1791), 1115 states have internal predecessors, (1791), 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 05:54:08,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1794 transitions. [2023-04-02 05:54:08,224 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1794 transitions. Word has length 120 [2023-04-02 05:54:08,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:54:08,225 INFO L495 AbstractCegarLoop]: Abstraction has 1119 states and 1794 transitions. [2023-04-02 05:54:08,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 3 states have internal predecessors, (117), 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 05:54:08,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1794 transitions. [2023-04-02 05:54:08,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-04-02 05:54:08,229 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:54:08,229 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:54:08,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 05:54:08,229 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:54:08,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:54:08,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1035924487, now seen corresponding path program 1 times [2023-04-02 05:54:08,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:54:08,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114598631] [2023-04-02 05:54:08,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:54:08,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:54:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:08,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:54:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:08,723 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 05:54:08,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:54:08,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114598631] [2023-04-02 05:54:08,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114598631] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:54:08,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:54:08,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:54:08,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464584332] [2023-04-02 05:54:08,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:54:08,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:54:08,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:54:08,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:54:08,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:54:08,726 INFO L87 Difference]: Start difference. First operand 1119 states and 1794 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 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 05:54:10,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:54:10,161 INFO L93 Difference]: Finished difference Result 2899 states and 4620 transitions. [2023-04-02 05:54:10,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:54:10,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 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 123 [2023-04-02 05:54:10,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:54:10,172 INFO L225 Difference]: With dead ends: 2899 [2023-04-02 05:54:10,172 INFO L226 Difference]: Without dead ends: 1973 [2023-04-02 05:54:10,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:54:10,183 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 182 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 05:54:10,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 1016 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 05:54:10,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2023-04-02 05:54:10,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1963. [2023-04-02 05:54:10,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1959 states have (on average 1.5880551301684533) internal successors, (3111), 1959 states have internal predecessors, (3111), 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 05:54:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 3114 transitions. [2023-04-02 05:54:10,331 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 3114 transitions. Word has length 123 [2023-04-02 05:54:10,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:54:10,332 INFO L495 AbstractCegarLoop]: Abstraction has 1963 states and 3114 transitions. [2023-04-02 05:54:10,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 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 05:54:10,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 3114 transitions. [2023-04-02 05:54:10,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-04-02 05:54:10,335 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:54:10,335 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:54:10,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 05:54:10,335 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:54:10,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:54:10,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1555733241, now seen corresponding path program 1 times [2023-04-02 05:54:10,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:54:10,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051278699] [2023-04-02 05:54:10,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:54:10,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:54:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:10,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:54:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:10,930 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 05:54:10,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:54:10,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051278699] [2023-04-02 05:54:10,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051278699] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:54:10,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:54:10,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 05:54:10,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787571637] [2023-04-02 05:54:10,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:54:10,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 05:54:10,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:54:10,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 05:54:10,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-02 05:54:10,941 INFO L87 Difference]: Start difference. First operand 1963 states and 3114 transitions. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 6 states have internal predecessors, (123), 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 05:54:13,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:54:13,090 INFO L93 Difference]: Finished difference Result 10175 states and 16266 transitions. [2023-04-02 05:54:13,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 05:54:13,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 6 states have internal predecessors, (123), 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 126 [2023-04-02 05:54:13,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:54:13,130 INFO L225 Difference]: With dead ends: 10175 [2023-04-02 05:54:13,131 INFO L226 Difference]: Without dead ends: 8381 [2023-04-02 05:54:13,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-04-02 05:54:13,141 INFO L413 NwaCegarLoop]: 536 mSDtfsCounter, 2146 mSDsluCounter, 3853 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2146 SdHoareTripleChecker+Valid, 4389 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-02 05:54:13,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2146 Valid, 4389 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-02 05:54:13,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8381 states. [2023-04-02 05:54:13,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8381 to 3562. [2023-04-02 05:54:13,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3562 states, 3558 states have (on average 1.5949971894322654) internal successors, (5675), 3558 states have internal predecessors, (5675), 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 05:54:13,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3562 states to 3562 states and 5678 transitions. [2023-04-02 05:54:13,568 INFO L78 Accepts]: Start accepts. Automaton has 3562 states and 5678 transitions. Word has length 126 [2023-04-02 05:54:13,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:54:13,568 INFO L495 AbstractCegarLoop]: Abstraction has 3562 states and 5678 transitions. [2023-04-02 05:54:13,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 6 states have internal predecessors, (123), 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 05:54:13,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3562 states and 5678 transitions. [2023-04-02 05:54:13,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-04-02 05:54:13,574 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:54:13,574 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:54:13,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 05:54:13,574 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:54:13,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:54:13,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1049258491, now seen corresponding path program 1 times [2023-04-02 05:54:13,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:54:13,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625760041] [2023-04-02 05:54:13,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:54:13,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:54:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:14,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:54:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:14,031 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 05:54:14,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:54:14,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625760041] [2023-04-02 05:54:14,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625760041] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:54:14,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:54:14,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 05:54:14,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344971144] [2023-04-02 05:54:14,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:54:14,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 05:54:14,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:54:14,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 05:54:14,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:54:14,033 INFO L87 Difference]: Start difference. First operand 3562 states and 5678 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 4 states have internal predecessors, (124), 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 05:54:16,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:54:16,103 INFO L93 Difference]: Finished difference Result 10415 states and 16653 transitions. [2023-04-02 05:54:16,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 05:54:16,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 4 states have internal predecessors, (124), 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 127 [2023-04-02 05:54:16,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:54:16,135 INFO L225 Difference]: With dead ends: 10415 [2023-04-02 05:54:16,136 INFO L226 Difference]: Without dead ends: 7046 [2023-04-02 05:54:16,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-02 05:54:16,146 INFO L413 NwaCegarLoop]: 540 mSDtfsCounter, 631 mSDsluCounter, 1223 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 1763 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-02 05:54:16,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 1763 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-02 05:54:16,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7046 states. [2023-04-02 05:54:16,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7046 to 5280. [2023-04-02 05:54:16,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5280 states, 5276 states have (on average 1.5943896891584535) internal successors, (8412), 5276 states have internal predecessors, (8412), 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 05:54:16,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5280 states to 5280 states and 8415 transitions. [2023-04-02 05:54:16,673 INFO L78 Accepts]: Start accepts. Automaton has 5280 states and 8415 transitions. Word has length 127 [2023-04-02 05:54:16,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:54:16,674 INFO L495 AbstractCegarLoop]: Abstraction has 5280 states and 8415 transitions. [2023-04-02 05:54:16,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 4 states have internal predecessors, (124), 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 05:54:16,674 INFO L276 IsEmpty]: Start isEmpty. Operand 5280 states and 8415 transitions. [2023-04-02 05:54:16,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-04-02 05:54:16,678 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:54:16,678 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:54:16,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 05:54:16,678 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:54:16,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:54:16,679 INFO L85 PathProgramCache]: Analyzing trace with hash 437726387, now seen corresponding path program 1 times [2023-04-02 05:54:16,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:54:16,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48054689] [2023-04-02 05:54:16,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:54:16,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:54:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:17,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:54:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:17,098 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 05:54:17,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:54:17,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48054689] [2023-04-02 05:54:17,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48054689] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:54:17,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:54:17,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:54:17,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078181624] [2023-04-02 05:54:17,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:54:17,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:54:17,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:54:17,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:54:17,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:54:17,101 INFO L87 Difference]: Start difference. First operand 5280 states and 8415 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 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 05:54:19,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:54:19,337 INFO L93 Difference]: Finished difference Result 11563 states and 18431 transitions. [2023-04-02 05:54:19,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:54:19,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 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 129 [2023-04-02 05:54:19,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:54:19,372 INFO L225 Difference]: With dead ends: 11563 [2023-04-02 05:54:19,372 INFO L226 Difference]: Without dead ends: 7995 [2023-04-02 05:54:19,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:54:19,381 INFO L413 NwaCegarLoop]: 692 mSDtfsCounter, 199 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 05:54:19,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 1184 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 05:54:19,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2023-04-02 05:54:20,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 7993. [2023-04-02 05:54:20,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7993 states, 7989 states have (on average 1.586431343096758) internal successors, (12674), 7989 states have internal predecessors, (12674), 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 05:54:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7993 states to 7993 states and 12677 transitions. [2023-04-02 05:54:20,197 INFO L78 Accepts]: Start accepts. Automaton has 7993 states and 12677 transitions. Word has length 129 [2023-04-02 05:54:20,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:54:20,197 INFO L495 AbstractCegarLoop]: Abstraction has 7993 states and 12677 transitions. [2023-04-02 05:54:20,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 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 05:54:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 7993 states and 12677 transitions. [2023-04-02 05:54:20,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-04-02 05:54:20,200 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:54:20,200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:54:20,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 05:54:20,200 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:54:20,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:54:20,201 INFO L85 PathProgramCache]: Analyzing trace with hash 495793195, now seen corresponding path program 1 times [2023-04-02 05:54:20,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:54:20,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476516824] [2023-04-02 05:54:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:54:20,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:54:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:20,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:54:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:20,651 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 05:54:20,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:54:20,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476516824] [2023-04-02 05:54:20,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476516824] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:54:20,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:54:20,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:54:20,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235091698] [2023-04-02 05:54:20,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:54:20,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:54:20,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:54:20,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:54:20,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:54:20,654 INFO L87 Difference]: Start difference. First operand 7993 states and 12677 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 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 05:54:22,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:54:22,795 INFO L93 Difference]: Finished difference Result 15474 states and 24580 transitions. [2023-04-02 05:54:22,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:54:22,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 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 129 [2023-04-02 05:54:22,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:54:22,823 INFO L225 Difference]: With dead ends: 15474 [2023-04-02 05:54:22,824 INFO L226 Difference]: Without dead ends: 11241 [2023-04-02 05:54:22,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:54:22,835 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 181 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-02 05:54:22,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 1071 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-02 05:54:22,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11241 states. [2023-04-02 05:54:23,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11241 to 11239. [2023-04-02 05:54:23,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11239 states, 11235 states have (on average 1.579795282599021) internal successors, (17749), 11235 states have internal predecessors, (17749), 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 05:54:23,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11239 states to 11239 states and 17752 transitions. [2023-04-02 05:54:23,759 INFO L78 Accepts]: Start accepts. Automaton has 11239 states and 17752 transitions. Word has length 129 [2023-04-02 05:54:23,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:54:23,759 INFO L495 AbstractCegarLoop]: Abstraction has 11239 states and 17752 transitions. [2023-04-02 05:54:23,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 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 05:54:23,760 INFO L276 IsEmpty]: Start isEmpty. Operand 11239 states and 17752 transitions. [2023-04-02 05:54:23,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-04-02 05:54:23,762 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:54:23,762 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:54:23,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 05:54:23,762 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:54:23,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:54:23,763 INFO L85 PathProgramCache]: Analyzing trace with hash 141471747, now seen corresponding path program 1 times [2023-04-02 05:54:23,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:54:23,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401172315] [2023-04-02 05:54:23,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:54:23,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:54:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:24,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:54:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:24,193 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 05:54:24,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:54:24,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401172315] [2023-04-02 05:54:24,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401172315] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:54:24,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:54:24,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:54:24,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277108670] [2023-04-02 05:54:24,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:54:24,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:54:24,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:54:24,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:54:24,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:54:24,199 INFO L87 Difference]: Start difference. First operand 11239 states and 17752 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 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 05:54:26,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:54:26,732 INFO L93 Difference]: Finished difference Result 21315 states and 33730 transitions. [2023-04-02 05:54:26,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:54:26,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 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 129 [2023-04-02 05:54:26,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:54:26,769 INFO L225 Difference]: With dead ends: 21315 [2023-04-02 05:54:26,769 INFO L226 Difference]: Without dead ends: 15399 [2023-04-02 05:54:26,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:54:26,785 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 187 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-02 05:54:26,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 1117 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-02 05:54:26,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15399 states. [2023-04-02 05:54:28,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15399 to 15397. [2023-04-02 05:54:28,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15397 states, 15393 states have (on average 1.5722731111544208) internal successors, (24202), 15393 states have internal predecessors, (24202), 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 05:54:28,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15397 states to 15397 states and 24205 transitions. [2023-04-02 05:54:28,100 INFO L78 Accepts]: Start accepts. Automaton has 15397 states and 24205 transitions. Word has length 129 [2023-04-02 05:54:28,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:54:28,101 INFO L495 AbstractCegarLoop]: Abstraction has 15397 states and 24205 transitions. [2023-04-02 05:54:28,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 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 05:54:28,102 INFO L276 IsEmpty]: Start isEmpty. Operand 15397 states and 24205 transitions. [2023-04-02 05:54:28,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-04-02 05:54:28,103 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:54:28,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:54:28,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 05:54:28,104 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:54:28,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:54:28,104 INFO L85 PathProgramCache]: Analyzing trace with hash -609352997, now seen corresponding path program 1 times [2023-04-02 05:54:28,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:54:28,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711384875] [2023-04-02 05:54:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:54:28,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:54:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:28,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:54:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:28,541 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 05:54:28,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:54:28,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711384875] [2023-04-02 05:54:28,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711384875] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:54:28,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:54:28,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:54:28,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787100922] [2023-04-02 05:54:28,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:54:28,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:54:28,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:54:28,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:54:28,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:54:28,543 INFO L87 Difference]: Start difference. First operand 15397 states and 24205 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 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 05:54:31,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:54:31,399 INFO L93 Difference]: Finished difference Result 29129 states and 45891 transitions. [2023-04-02 05:54:31,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:54:31,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 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 129 [2023-04-02 05:54:31,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:54:31,447 INFO L225 Difference]: With dead ends: 29129 [2023-04-02 05:54:31,448 INFO L226 Difference]: Without dead ends: 20953 [2023-04-02 05:54:31,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:54:31,472 INFO L413 NwaCegarLoop]: 670 mSDtfsCounter, 193 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-02 05:54:31,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1163 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-02 05:54:31,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20953 states. [2023-04-02 05:54:33,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20953 to 20951. [2023-04-02 05:54:33,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20951 states, 20947 states have (on average 1.5640425836635317) internal successors, (32762), 20947 states have internal predecessors, (32762), 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 05:54:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20951 states to 20951 states and 32765 transitions. [2023-04-02 05:54:33,502 INFO L78 Accepts]: Start accepts. Automaton has 20951 states and 32765 transitions. Word has length 129 [2023-04-02 05:54:33,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:54:33,503 INFO L495 AbstractCegarLoop]: Abstraction has 20951 states and 32765 transitions. [2023-04-02 05:54:33,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 3 states have internal predecessors, (126), 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 05:54:33,503 INFO L276 IsEmpty]: Start isEmpty. Operand 20951 states and 32765 transitions. [2023-04-02 05:54:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-04-02 05:54:33,504 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:54:33,504 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:54:33,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 05:54:33,505 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:54:33,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:54:33,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1924455262, now seen corresponding path program 1 times [2023-04-02 05:54:33,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:54:33,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203256714] [2023-04-02 05:54:33,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:54:33,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:54:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:34,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:54:34,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:34,200 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 05:54:34,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:54:34,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203256714] [2023-04-02 05:54:34,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203256714] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:54:34,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:54:34,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 05:54:34,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439635892] [2023-04-02 05:54:34,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:54:34,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 05:54:34,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:54:34,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 05:54:34,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 05:54:34,203 INFO L87 Difference]: Start difference. First operand 20951 states and 32765 transitions. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 5 states have internal predecessors, (133), 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 05:54:38,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:54:38,375 INFO L93 Difference]: Finished difference Result 34807 states and 54114 transitions. [2023-04-02 05:54:38,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 05:54:38,376 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 5 states have internal predecessors, (133), 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 136 [2023-04-02 05:54:38,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:54:38,447 INFO L225 Difference]: With dead ends: 34807 [2023-04-02 05:54:38,448 INFO L226 Difference]: Without dead ends: 34805 [2023-04-02 05:54:38,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 05:54:38,465 INFO L413 NwaCegarLoop]: 655 mSDtfsCounter, 413 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 2369 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 05:54:38,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 2369 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 05:54:38,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34805 states. [2023-04-02 05:54:40,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34805 to 21271. [2023-04-02 05:54:41,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21271 states, 21267 states have (on average 1.5517468378238586) internal successors, (33001), 21267 states have internal predecessors, (33001), 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 05:54:41,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21271 states to 21271 states and 33004 transitions. [2023-04-02 05:54:41,048 INFO L78 Accepts]: Start accepts. Automaton has 21271 states and 33004 transitions. Word has length 136 [2023-04-02 05:54:41,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:54:41,049 INFO L495 AbstractCegarLoop]: Abstraction has 21271 states and 33004 transitions. [2023-04-02 05:54:41,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 5 states have internal predecessors, (133), 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 05:54:41,049 INFO L276 IsEmpty]: Start isEmpty. Operand 21271 states and 33004 transitions. [2023-04-02 05:54:41,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-04-02 05:54:41,053 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:54:41,054 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:54:41,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 05:54:41,054 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:54:41,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:54:41,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1751777002, now seen corresponding path program 1 times [2023-04-02 05:54:41,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:54:41,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971084899] [2023-04-02 05:54:41,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:54:41,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:54:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:41,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:54:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 05:54:41,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:54:41,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971084899] [2023-04-02 05:54:41,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971084899] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:54:41,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:54:41,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 05:54:41,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633920819] [2023-04-02 05:54:41,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:54:41,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 05:54:41,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:54:41,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 05:54:41,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 05:54:41,606 INFO L87 Difference]: Start difference. First operand 21271 states and 33004 transitions. Second operand has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 6 states have internal predecessors, (164), 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 05:54:49,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:54:49,113 INFO L93 Difference]: Finished difference Result 70091 states and 109085 transitions. [2023-04-02 05:54:49,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 05:54:49,114 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 6 states have internal predecessors, (164), 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 167 [2023-04-02 05:54:49,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:54:49,236 INFO L225 Difference]: With dead ends: 70091 [2023-04-02 05:54:49,236 INFO L226 Difference]: Without dead ends: 61449 [2023-04-02 05:54:49,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-04-02 05:54:49,273 INFO L413 NwaCegarLoop]: 733 mSDtfsCounter, 1415 mSDsluCounter, 1882 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1415 SdHoareTripleChecker+Valid, 2615 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 05:54:49,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1415 Valid, 2615 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 05:54:49,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61449 states. [2023-04-02 05:54:53,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61449 to 35697. [2023-04-02 05:54:54,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35697 states, 35693 states have (on average 1.5479505785448127) internal successors, (55251), 35693 states have internal predecessors, (55251), 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 05:54:54,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35697 states to 35697 states and 55254 transitions. [2023-04-02 05:54:54,094 INFO L78 Accepts]: Start accepts. Automaton has 35697 states and 55254 transitions. Word has length 167 [2023-04-02 05:54:54,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:54:54,094 INFO L495 AbstractCegarLoop]: Abstraction has 35697 states and 55254 transitions. [2023-04-02 05:54:54,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 6 states have internal predecessors, (164), 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 05:54:54,094 INFO L276 IsEmpty]: Start isEmpty. Operand 35697 states and 55254 transitions. [2023-04-02 05:54:54,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-04-02 05:54:54,099 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:54:54,099 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:54:54,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 05:54:54,100 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:54:54,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:54:54,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1693710194, now seen corresponding path program 1 times [2023-04-02 05:54:54,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:54:54,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958566196] [2023-04-02 05:54:54,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:54:54,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:54:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:54,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:54:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:54:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-02 05:54:54,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:54:54,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958566196] [2023-04-02 05:54:54,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958566196] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:54:54,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:54:54,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 05:54:54,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034239772] [2023-04-02 05:54:54,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:54:54,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 05:54:54,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:54:54,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 05:54:54,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 05:54:54,708 INFO L87 Difference]: Start difference. First operand 35697 states and 55254 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 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 05:55:03,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:55:03,517 INFO L93 Difference]: Finished difference Result 82366 states and 128155 transitions. [2023-04-02 05:55:03,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 05:55:03,518 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 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 167 [2023-04-02 05:55:03,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:55:03,637 INFO L225 Difference]: With dead ends: 82366 [2023-04-02 05:55:03,638 INFO L226 Difference]: Without dead ends: 68420 [2023-04-02 05:55:03,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-04-02 05:55:03,671 INFO L413 NwaCegarLoop]: 742 mSDtfsCounter, 1418 mSDsluCounter, 2385 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1418 SdHoareTripleChecker+Valid, 3127 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 05:55:03,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1418 Valid, 3127 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 05:55:03,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68420 states. [2023-04-02 05:55:10,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68420 to 51633. [2023-04-02 05:55:10,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51633 states, 51629 states have (on average 1.5495748513432372) internal successors, (80003), 51629 states have internal predecessors, (80003), 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 05:55:10,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51633 states to 51633 states and 80006 transitions. [2023-04-02 05:55:10,589 INFO L78 Accepts]: Start accepts. Automaton has 51633 states and 80006 transitions. Word has length 167 [2023-04-02 05:55:10,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:55:10,590 INFO L495 AbstractCegarLoop]: Abstraction has 51633 states and 80006 transitions. [2023-04-02 05:55:10,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 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 05:55:10,590 INFO L276 IsEmpty]: Start isEmpty. Operand 51633 states and 80006 transitions. [2023-04-02 05:55:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-04-02 05:55:10,595 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:55:10,595 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:55:10,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 05:55:10,595 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:55:10,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:55:10,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2048031642, now seen corresponding path program 1 times [2023-04-02 05:55:10,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:55:10,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954577558] [2023-04-02 05:55:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:55:10,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:55:10,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:55:11,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:55:11,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:55:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-02 05:55:11,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:55:11,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954577558] [2023-04-02 05:55:11,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954577558] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:55:11,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:55:11,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 05:55:11,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489066448] [2023-04-02 05:55:11,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:55:11,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 05:55:11,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:55:11,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 05:55:11,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 05:55:11,176 INFO L87 Difference]: Start difference. First operand 51633 states and 80006 transitions. Second operand has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 6 states have internal predecessors, (152), 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 05:55:21,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:55:21,301 INFO L93 Difference]: Finished difference Result 90305 states and 140528 transitions. [2023-04-02 05:55:21,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 05:55:21,302 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 6 states have internal predecessors, (152), 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 167 [2023-04-02 05:55:21,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:55:21,468 INFO L225 Difference]: With dead ends: 90305 [2023-04-02 05:55:21,468 INFO L226 Difference]: Without dead ends: 76359 [2023-04-02 05:55:21,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-04-02 05:55:21,505 INFO L413 NwaCegarLoop]: 747 mSDtfsCounter, 1280 mSDsluCounter, 2520 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 3267 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-04-02 05:55:21,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1280 Valid, 3267 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-04-02 05:55:21,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76359 states. [2023-04-02 05:55:29,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76359 to 63249. [2023-04-02 05:55:29,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63249 states, 63245 states have (on average 1.5504624871531347) internal successors, (98059), 63245 states have internal predecessors, (98059), 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 05:55:29,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63249 states to 63249 states and 98062 transitions. [2023-04-02 05:55:29,704 INFO L78 Accepts]: Start accepts. Automaton has 63249 states and 98062 transitions. Word has length 167 [2023-04-02 05:55:29,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:55:29,704 INFO L495 AbstractCegarLoop]: Abstraction has 63249 states and 98062 transitions. [2023-04-02 05:55:29,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 6 states have internal predecessors, (152), 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 05:55:29,705 INFO L276 IsEmpty]: Start isEmpty. Operand 63249 states and 98062 transitions. [2023-04-02 05:55:29,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-04-02 05:55:29,710 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:55:29,710 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:55:29,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-02 05:55:29,710 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:55:29,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:55:29,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1496110910, now seen corresponding path program 1 times [2023-04-02 05:55:29,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:55:29,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71812423] [2023-04-02 05:55:29,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:55:29,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:55:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:55:30,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:55:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:55:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 05:55:30,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:55:30,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71812423] [2023-04-02 05:55:30,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71812423] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:55:30,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:55:30,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-02 05:55:30,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512190266] [2023-04-02 05:55:30,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:55:30,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 05:55:30,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:55:30,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 05:55:30,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-02 05:55:30,189 INFO L87 Difference]: Start difference. First operand 63249 states and 98062 transitions. Second operand has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 6 states have internal predecessors, (158), 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 05:55:43,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:55:43,083 INFO L93 Difference]: Finished difference Result 101396 states and 157789 transitions. [2023-04-02 05:55:43,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 05:55:43,083 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 6 states have internal predecessors, (158), 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 167 [2023-04-02 05:55:43,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:55:43,260 INFO L225 Difference]: With dead ends: 101396 [2023-04-02 05:55:43,260 INFO L226 Difference]: Without dead ends: 87450 [2023-04-02 05:55:43,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-04-02 05:55:43,300 INFO L413 NwaCegarLoop]: 752 mSDtfsCounter, 1356 mSDsluCounter, 2208 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 2960 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-02 05:55:43,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1356 Valid, 2960 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-02 05:55:43,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87450 states. [2023-04-02 05:55:53,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87450 to 74865. [2023-04-02 05:55:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74865 states, 74861 states have (on average 1.5510746583668398) internal successors, (116115), 74861 states have internal predecessors, (116115), 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 05:55:54,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74865 states to 74865 states and 116118 transitions. [2023-04-02 05:55:54,172 INFO L78 Accepts]: Start accepts. Automaton has 74865 states and 116118 transitions. Word has length 167 [2023-04-02 05:55:54,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:55:54,173 INFO L495 AbstractCegarLoop]: Abstraction has 74865 states and 116118 transitions. [2023-04-02 05:55:54,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 6 states have internal predecessors, (158), 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 05:55:54,173 INFO L276 IsEmpty]: Start isEmpty. Operand 74865 states and 116118 transitions. [2023-04-02 05:55:54,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-04-02 05:55:54,179 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:55:54,179 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:55:54,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-02 05:55:54,179 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:55:54,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:55:54,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1463319510, now seen corresponding path program 1 times [2023-04-02 05:55:54,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:55:54,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579010380] [2023-04-02 05:55:54,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:55:54,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:55:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:55:54,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:55:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:55:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 05:55:54,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:55:54,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579010380] [2023-04-02 05:55:54,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579010380] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:55:54,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:55:54,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 05:55:54,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814895121] [2023-04-02 05:55:54,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:55:54,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 05:55:54,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:55:54,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 05:55:54,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:55:54,642 INFO L87 Difference]: Start difference. First operand 74865 states and 116118 transitions. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 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 05:56:08,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:56:08,253 INFO L93 Difference]: Finished difference Result 108582 states and 168819 transitions. [2023-04-02 05:56:08,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 05:56:08,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 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 168 [2023-04-02 05:56:08,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:56:08,448 INFO L225 Difference]: With dead ends: 108582 [2023-04-02 05:56:08,448 INFO L226 Difference]: Without dead ends: 91652 [2023-04-02 05:56:08,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-02 05:56:08,488 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 367 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1764 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-02 05:56:08,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 1764 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-02 05:56:08,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91652 states. [2023-04-02 05:56:20,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91652 to 85456. [2023-04-02 05:56:20,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85456 states, 85452 states have (on average 1.5507536394701118) internal successors, (132515), 85452 states have internal predecessors, (132515), 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 05:56:20,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85456 states to 85456 states and 132518 transitions. [2023-04-02 05:56:20,571 INFO L78 Accepts]: Start accepts. Automaton has 85456 states and 132518 transitions. Word has length 168 [2023-04-02 05:56:20,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:56:20,572 INFO L495 AbstractCegarLoop]: Abstraction has 85456 states and 132518 transitions. [2023-04-02 05:56:20,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 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 05:56:20,572 INFO L276 IsEmpty]: Start isEmpty. Operand 85456 states and 132518 transitions. [2023-04-02 05:56:20,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-04-02 05:56:20,578 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:56:20,578 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:56:20,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-02 05:56:20,578 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:56:20,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:56:20,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1633557296, now seen corresponding path program 1 times [2023-04-02 05:56:20,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:56:20,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312376221] [2023-04-02 05:56:20,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:56:20,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:56:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:56:20,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:56:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:56:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 05:56:20,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:56:20,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312376221] [2023-04-02 05:56:20,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312376221] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:56:20,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:56:20,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:56:20,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248021680] [2023-04-02 05:56:20,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:56:20,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:56:20,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:56:20,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:56:20,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:56:20,990 INFO L87 Difference]: Start difference. First operand 85456 states and 132518 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 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 05:56:41,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 05:56:41,204 INFO L93 Difference]: Finished difference Result 178008 states and 276590 transitions. [2023-04-02 05:56:41,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 05:56:41,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 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 168 [2023-04-02 05:56:41,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 05:56:41,513 INFO L225 Difference]: With dead ends: 178008 [2023-04-02 05:56:41,514 INFO L226 Difference]: Without dead ends: 139766 [2023-04-02 05:56:41,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 05:56:41,585 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 172 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 05:56:41,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 1006 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 05:56:41,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139766 states. [2023-04-02 05:57:01,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139766 to 139523. [2023-04-02 05:57:01,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139523 states, 139519 states have (on average 1.5502046316272335) internal successors, (216283), 139519 states have internal predecessors, (216283), 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 05:57:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139523 states to 139523 states and 216286 transitions. [2023-04-02 05:57:01,942 INFO L78 Accepts]: Start accepts. Automaton has 139523 states and 216286 transitions. Word has length 168 [2023-04-02 05:57:01,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 05:57:01,943 INFO L495 AbstractCegarLoop]: Abstraction has 139523 states and 216286 transitions. [2023-04-02 05:57:01,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 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 05:57:01,943 INFO L276 IsEmpty]: Start isEmpty. Operand 139523 states and 216286 transitions. [2023-04-02 05:57:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-04-02 05:57:01,949 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 05:57:01,950 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:57:01,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-02 05:57:01,950 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 05:57:01,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 05:57:01,950 INFO L85 PathProgramCache]: Analyzing trace with hash -523729782, now seen corresponding path program 1 times [2023-04-02 05:57:01,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 05:57:01,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144224445] [2023-04-02 05:57:01,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 05:57:01,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 05:57:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:02,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 05:57:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 05:57:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 05:57:02,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 05:57:02,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144224445] [2023-04-02 05:57:02,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144224445] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 05:57:02,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 05:57:02,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 05:57:02,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368654464] [2023-04-02 05:57:02,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 05:57:02,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 05:57:02,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 05:57:02,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 05:57:02,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 05:57:02,299 INFO L87 Difference]: Start difference. First operand 139523 states and 216286 transitions. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 3 states have internal predecessors, (166), 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)