/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/09_fmaxsym.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 06:29:05,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 06:29:05,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 06:29:05,405 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 06:29:05,406 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 06:29:05,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 06:29:05,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 06:29:05,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 06:29:05,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 06:29:05,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 06:29:05,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 06:29:05,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 06:29:05,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 06:29:05,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 06:29:05,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 06:29:05,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 06:29:05,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 06:29:05,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 06:29:05,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 06:29:05,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 06:29:05,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 06:29:05,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 06:29:05,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 06:29:05,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 06:29:05,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 06:29:05,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 06:29:05,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 06:29:05,439 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 06:29:05,439 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 06:29:05,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 06:29:05,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 06:29:05,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 06:29:05,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 06:29:05,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 06:29:05,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 06:29:05,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 06:29:05,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 06:29:05,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 06:29:05,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 06:29:05,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 06:29:05,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 06:29:05,444 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 06:29:05,465 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 06:29:05,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 06:29:05,466 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 06:29:05,466 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 06:29:05,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 06:29:05,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 06:29:05,467 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 06:29:05,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 06:29:05,467 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 06:29:05,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 06:29:05,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 06:29:05,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 06:29:05,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 06:29:05,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 06:29:05,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 06:29:05,468 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 06:29:05,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 06:29:05,468 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 06:29:05,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 06:29:05,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 06:29:05,468 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 06:29:05,469 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 06:29:05,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 06:29:05,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 06:29:05,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 06:29:05,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 06:29:05,469 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 06:29:05,469 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 06:29:05,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 06:29:05,470 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 06:29:05,470 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 06:29:05,470 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 06:29:05,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 06:29:05,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 06:29:05,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 06:29:05,669 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 06:29:05,669 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 06:29:05,670 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/09_fmaxsym.i [2023-01-28 06:29:06,641 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 06:29:06,826 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 06:29:06,827 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/09_fmaxsym.i [2023-01-28 06:29:06,850 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76556262e/f0214c7582bc4c519248f0e51ec7a9e5/FLAG46b0bb134 [2023-01-28 06:29:06,862 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76556262e/f0214c7582bc4c519248f0e51ec7a9e5 [2023-01-28 06:29:06,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 06:29:06,864 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 06:29:06,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 06:29:06,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 06:29:06,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 06:29:06,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 06:29:06" (1/1) ... [2023-01-28 06:29:06,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e77d6d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:29:06, skipping insertion in model container [2023-01-28 06:29:06,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 06:29:06" (1/1) ... [2023-01-28 06:29:06,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 06:29:06,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 06:29:07,108 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/09_fmaxsym.i[30422,30435] [2023-01-28 06:29:07,117 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 06:29:07,125 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 06:29:07,156 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/09_fmaxsym.i[30422,30435] [2023-01-28 06:29:07,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 06:29:07,215 INFO L208 MainTranslator]: Completed translation [2023-01-28 06:29:07,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:29:07 WrapperNode [2023-01-28 06:29:07,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 06:29:07,216 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 06:29:07,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 06:29:07,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 06:29:07,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:29:07" (1/1) ... [2023-01-28 06:29:07,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:29:07" (1/1) ... [2023-01-28 06:29:07,262 INFO L138 Inliner]: procedures = 171, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 78 [2023-01-28 06:29:07,262 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 06:29:07,263 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 06:29:07,263 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 06:29:07,263 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 06:29:07,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:29:07" (1/1) ... [2023-01-28 06:29:07,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:29:07" (1/1) ... [2023-01-28 06:29:07,273 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:29:07" (1/1) ... [2023-01-28 06:29:07,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:29:07" (1/1) ... [2023-01-28 06:29:07,286 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:29:07" (1/1) ... [2023-01-28 06:29:07,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:29:07" (1/1) ... [2023-01-28 06:29:07,293 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:29:07" (1/1) ... [2023-01-28 06:29:07,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:29:07" (1/1) ... [2023-01-28 06:29:07,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 06:29:07,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 06:29:07,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 06:29:07,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 06:29:07,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:29:07" (1/1) ... [2023-01-28 06:29:07,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 06:29:07,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 06:29:07,328 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) [2023-01-28 06:29:07,337 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 [2023-01-28 06:29:07,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 06:29:07,357 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-01-28 06:29:07,357 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-01-28 06:29:07,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 06:29:07,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 06:29:07,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 06:29:07,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 06:29:07,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 06:29:07,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 06:29:07,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 06:29:07,358 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 06:29:07,455 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 06:29:07,456 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 06:29:07,558 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 06:29:07,578 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 06:29:07,578 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-28 06:29:07,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 06:29:07 BoogieIcfgContainer [2023-01-28 06:29:07,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 06:29:07,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 06:29:07,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 06:29:07,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 06:29:07,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 06:29:06" (1/3) ... [2023-01-28 06:29:07,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66e65b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 06:29:07, skipping insertion in model container [2023-01-28 06:29:07,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 06:29:07" (2/3) ... [2023-01-28 06:29:07,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66e65b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 06:29:07, skipping insertion in model container [2023-01-28 06:29:07,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 06:29:07" (3/3) ... [2023-01-28 06:29:07,584 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym.i [2023-01-28 06:29:07,594 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 06:29:07,594 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 06:29:07,594 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 06:29:07,626 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:29:07,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 72 transitions, 149 flow [2023-01-28 06:29:07,687 INFO L130 PetriNetUnfolder]: 7/82 cut-off events. [2023-01-28 06:29:07,687 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:29:07,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 82 events. 7/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2023-01-28 06:29:07,691 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 72 transitions, 149 flow [2023-01-28 06:29:07,693 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 72 transitions, 149 flow [2023-01-28 06:29:07,695 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:29:07,701 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 72 transitions, 149 flow [2023-01-28 06:29:07,703 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 72 transitions, 149 flow [2023-01-28 06:29:07,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 72 transitions, 149 flow [2023-01-28 06:29:07,735 INFO L130 PetriNetUnfolder]: 7/82 cut-off events. [2023-01-28 06:29:07,735 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:29:07,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 82 events. 7/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2023-01-28 06:29:07,737 INFO L119 LiptonReduction]: Number of co-enabled transitions 988 [2023-01-28 06:29:09,702 INFO L134 LiptonReduction]: Checked pairs total: 1018 [2023-01-28 06:29:09,703 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-01-28 06:29:09,712 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:29:09,716 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=false, 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;@1081f330, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:29:09,717 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-28 06:29:09,719 INFO L130 PetriNetUnfolder]: 1/10 cut-off events. [2023-01-28 06:29:09,719 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:29:09,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:29:09,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-01-28 06:29:09,720 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:29:09,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:29:09,723 INFO L85 PathProgramCache]: Analyzing trace with hash 339243402, now seen corresponding path program 1 times [2023-01-28 06:29:09,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:29:09,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150569888] [2023-01-28 06:29:09,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:29:09,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:29:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:29:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:29:09,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:29:09,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150569888] [2023-01-28 06:29:09,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150569888] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:29:09,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:29:09,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 06:29:09,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925477672] [2023-01-28 06:29:09,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:29:09,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-28 06:29:09,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:29:09,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-28 06:29:09,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-28 06:29:09,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 149 [2023-01-28 06:29:09,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 25 flow. Second operand has 2 states, 2 states have (on average 65.5) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:09,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:29:09,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 149 [2023-01-28 06:29:09,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:29:09,900 INFO L130 PetriNetUnfolder]: 7/19 cut-off events. [2023-01-28 06:29:09,900 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:29:09,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 19 events. 7/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 4 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 30. Up to 19 conditions per place. [2023-01-28 06:29:09,902 INFO L137 encePairwiseOnDemand]: 147/149 looper letters, 0 selfloop transitions, 0 changer transitions 8/8 dead transitions. [2023-01-28 06:29:09,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 35 flow [2023-01-28 06:29:09,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-28 06:29:09,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-28 06:29:09,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 135 transitions. [2023-01-28 06:29:09,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45302013422818793 [2023-01-28 06:29:09,913 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 135 transitions. [2023-01-28 06:29:09,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 135 transitions. [2023-01-28 06:29:09,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:29:09,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 135 transitions. [2023-01-28 06:29:09,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 67.5) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:09,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:09,925 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:09,926 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 25 flow. Second operand 2 states and 135 transitions. [2023-01-28 06:29:09,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 35 flow [2023-01-28 06:29:09,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 35 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 06:29:09,928 INFO L231 Difference]: Finished difference. Result has 11 places, 0 transitions, 0 flow [2023-01-28 06:29:09,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=21, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=0, PETRI_PLACES=11, PETRI_TRANSITIONS=0} [2023-01-28 06:29:09,932 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, -1 predicate places. [2023-01-28 06:29:09,932 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 0 transitions, 0 flow [2023-01-28 06:29:09,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 65.5) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:09,934 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-01-28 06:29:09,934 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-28 06:29:09,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 06:29:09,934 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:29:09,937 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-01-28 06:29:09,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 72 transitions, 149 flow [2023-01-28 06:29:09,958 INFO L130 PetriNetUnfolder]: 7/82 cut-off events. [2023-01-28 06:29:09,958 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:29:09,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 82 events. 7/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2023-01-28 06:29:09,958 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 72 transitions, 149 flow [2023-01-28 06:29:09,959 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 72 transitions, 149 flow [2023-01-28 06:29:09,959 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:29:09,959 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 72 transitions, 149 flow [2023-01-28 06:29:09,959 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 72 transitions, 149 flow [2023-01-28 06:29:09,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 72 transitions, 149 flow [2023-01-28 06:29:09,966 INFO L130 PetriNetUnfolder]: 7/82 cut-off events. [2023-01-28 06:29:09,966 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:29:09,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 82 events. 7/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 67 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2023-01-28 06:29:09,967 INFO L119 LiptonReduction]: Number of co-enabled transitions 988 [2023-01-28 06:29:11,594 INFO L134 LiptonReduction]: Checked pairs total: 1008 [2023-01-28 06:29:11,595 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-01-28 06:29:11,606 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:29:11,607 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=false, 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;@1081f330, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:29:11,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 06:29:11,609 INFO L130 PetriNetUnfolder]: 1/11 cut-off events. [2023-01-28 06:29:11,609 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-28 06:29:11,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:29:11,609 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-28 06:29:11,609 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:29:11,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:29:11,610 INFO L85 PathProgramCache]: Analyzing trace with hash -62301113, now seen corresponding path program 1 times [2023-01-28 06:29:11,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:29:11,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11615558] [2023-01-28 06:29:11,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:29:11,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:29:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:29:11,642 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:29:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:29:11,661 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:29:11,661 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:29:11,661 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 06:29:11,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 06:29:11,662 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:29:11,662 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 06:29:11,662 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:29:11,662 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-28 06:29:11,679 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:29:11,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 111 transitions, 234 flow [2023-01-28 06:29:11,698 INFO L130 PetriNetUnfolder]: 13/133 cut-off events. [2023-01-28 06:29:11,699 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:29:11,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 13/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-01-28 06:29:11,700 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 111 transitions, 234 flow [2023-01-28 06:29:11,700 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 111 transitions, 234 flow [2023-01-28 06:29:11,700 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:29:11,701 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 111 transitions, 234 flow [2023-01-28 06:29:11,701 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 111 transitions, 234 flow [2023-01-28 06:29:11,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 111 transitions, 234 flow [2023-01-28 06:29:11,712 INFO L130 PetriNetUnfolder]: 13/133 cut-off events. [2023-01-28 06:29:11,712 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:29:11,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 13/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-01-28 06:29:11,715 INFO L119 LiptonReduction]: Number of co-enabled transitions 4940 [2023-01-28 06:29:13,268 INFO L134 LiptonReduction]: Checked pairs total: 8769 [2023-01-28 06:29:13,269 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-01-28 06:29:13,272 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:29:13,277 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=false, 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;@1081f330, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:29:13,277 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 06:29:13,284 INFO L130 PetriNetUnfolder]: 2/20 cut-off events. [2023-01-28 06:29:13,285 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 06:29:13,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:29:13,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:29:13,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:29:13,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:29:13,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1422340461, now seen corresponding path program 1 times [2023-01-28 06:29:13,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:29:13,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566529400] [2023-01-28 06:29:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:29:13,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:29:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:29:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:29:13,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:29:13,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566529400] [2023-01-28 06:29:13,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566529400] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:29:13,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:29:13,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:29:13,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943167352] [2023-01-28 06:29:13,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:29:13,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:29:13,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:29:13,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:29:13,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:29:13,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 212 [2023-01-28 06:29:13,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:13,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:29:13,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 212 [2023-01-28 06:29:13,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:29:13,460 INFO L130 PetriNetUnfolder]: 409/676 cut-off events. [2023-01-28 06:29:13,460 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2023-01-28 06:29:13,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1381 conditions, 676 events. 409/676 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3108 event pairs, 181 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 854. Up to 428 conditions per place. [2023-01-28 06:29:13,463 INFO L137 encePairwiseOnDemand]: 205/212 looper letters, 34 selfloop transitions, 5 changer transitions 1/43 dead transitions. [2023-01-28 06:29:13,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 43 transitions, 183 flow [2023-01-28 06:29:13,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:29:13,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:29:13,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 286 transitions. [2023-01-28 06:29:13,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449685534591195 [2023-01-28 06:29:13,466 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 286 transitions. [2023-01-28 06:29:13,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 286 transitions. [2023-01-28 06:29:13,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:29:13,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 286 transitions. [2023-01-28 06:29:13,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:13,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:13,468 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:13,468 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 68 flow. Second operand 3 states and 286 transitions. [2023-01-28 06:29:13,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 43 transitions, 183 flow [2023-01-28 06:29:13,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 181 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-01-28 06:29:13,470 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 98 flow [2023-01-28 06:29:13,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2023-01-28 06:29:13,471 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-01-28 06:29:13,471 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 98 flow [2023-01-28 06:29:13,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:13,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:29:13,471 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:29:13,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 06:29:13,471 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:29:13,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:29:13,472 INFO L85 PathProgramCache]: Analyzing trace with hash -646009066, now seen corresponding path program 1 times [2023-01-28 06:29:13,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:29:13,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196589725] [2023-01-28 06:29:13,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:29:13,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:29:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:29:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:29:13,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:29:13,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196589725] [2023-01-28 06:29:13,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196589725] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:29:13,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:29:13,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:29:13,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467838782] [2023-01-28 06:29:13,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:29:13,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:29:13,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:29:13,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:29:13,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:29:13,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 212 [2023-01-28 06:29:13,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:13,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:29:13,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 212 [2023-01-28 06:29:13,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:29:13,594 INFO L130 PetriNetUnfolder]: 501/824 cut-off events. [2023-01-28 06:29:13,594 INFO L131 PetriNetUnfolder]: For 304/304 co-relation queries the response was YES. [2023-01-28 06:29:13,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1968 conditions, 824 events. 501/824 cut-off events. For 304/304 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3808 event pairs, 221 based on Foata normal form. 0/730 useless extension candidates. Maximal degree in co-relation 1362. Up to 508 conditions per place. [2023-01-28 06:29:13,597 INFO L137 encePairwiseOnDemand]: 206/212 looper letters, 36 selfloop transitions, 6 changer transitions 2/47 dead transitions. [2023-01-28 06:29:13,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 47 transitions, 242 flow [2023-01-28 06:29:13,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:29:13,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:29:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-01-28 06:29:13,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4449685534591195 [2023-01-28 06:29:13,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-01-28 06:29:13,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-01-28 06:29:13,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:29:13,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-01-28 06:29:13,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:13,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:13,613 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:13,613 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 98 flow. Second operand 3 states and 283 transitions. [2023-01-28 06:29:13,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 47 transitions, 242 flow [2023-01-28 06:29:13,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 47 transitions, 224 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 06:29:13,615 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 128 flow [2023-01-28 06:29:13,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-01-28 06:29:13,616 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-01-28 06:29:13,616 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 128 flow [2023-01-28 06:29:13,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:13,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:29:13,616 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:29:13,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 06:29:13,617 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:29:13,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:29:13,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1399925076, now seen corresponding path program 1 times [2023-01-28 06:29:13,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:29:13,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067101768] [2023-01-28 06:29:13,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:29:13,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:29:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:29:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:29:13,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:29:13,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067101768] [2023-01-28 06:29:13,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067101768] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:29:13,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:29:13,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 06:29:13,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143721352] [2023-01-28 06:29:13,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:29:13,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 06:29:13,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:29:13,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 06:29:13,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 06:29:13,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 212 [2023-01-28 06:29:13,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:13,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:29:13,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 212 [2023-01-28 06:29:13,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:29:13,890 INFO L130 PetriNetUnfolder]: 727/1198 cut-off events. [2023-01-28 06:29:13,890 INFO L131 PetriNetUnfolder]: For 530/530 co-relation queries the response was YES. [2023-01-28 06:29:13,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3121 conditions, 1198 events. 727/1198 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6026 event pairs, 227 based on Foata normal form. 0/1177 useless extension candidates. Maximal degree in co-relation 2454. Up to 538 conditions per place. [2023-01-28 06:29:13,894 INFO L137 encePairwiseOnDemand]: 203/212 looper letters, 54 selfloop transitions, 16 changer transitions 6/79 dead transitions. [2023-01-28 06:29:13,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 79 transitions, 445 flow [2023-01-28 06:29:13,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 06:29:13,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 06:29:13,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 538 transitions. [2023-01-28 06:29:13,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229559748427673 [2023-01-28 06:29:13,896 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 538 transitions. [2023-01-28 06:29:13,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 538 transitions. [2023-01-28 06:29:13,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:29:13,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 538 transitions. [2023-01-28 06:29:13,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.66666666666667) internal successors, (538), 6 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:13,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:13,899 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:13,899 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 128 flow. Second operand 6 states and 538 transitions. [2023-01-28 06:29:13,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 79 transitions, 445 flow [2023-01-28 06:29:13,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 79 transitions, 415 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 06:29:13,902 INFO L231 Difference]: Finished difference. Result has 41 places, 45 transitions, 240 flow [2023-01-28 06:29:13,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=240, PETRI_PLACES=41, PETRI_TRANSITIONS=45} [2023-01-28 06:29:13,902 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2023-01-28 06:29:13,902 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 45 transitions, 240 flow [2023-01-28 06:29:13,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:13,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:29:13,903 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:29:13,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 06:29:13,903 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:29:13,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:29:13,903 INFO L85 PathProgramCache]: Analyzing trace with hash -822908724, now seen corresponding path program 2 times [2023-01-28 06:29:13,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:29:13,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869884959] [2023-01-28 06:29:13,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:29:13,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:29:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:29:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:29:13,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:29:13,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869884959] [2023-01-28 06:29:13,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869884959] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:29:13,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:29:13,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 06:29:13,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549004907] [2023-01-28 06:29:13,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:29:13,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 06:29:13,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:29:13,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 06:29:13,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 06:29:13,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 212 [2023-01-28 06:29:13,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 45 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:13,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:29:13,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 212 [2023-01-28 06:29:13,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:29:14,143 INFO L130 PetriNetUnfolder]: 1059/1750 cut-off events. [2023-01-28 06:29:14,143 INFO L131 PetriNetUnfolder]: For 1856/1856 co-relation queries the response was YES. [2023-01-28 06:29:14,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5166 conditions, 1750 events. 1059/1750 cut-off events. For 1856/1856 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 9501 event pairs, 481 based on Foata normal form. 22/1764 useless extension candidates. Maximal degree in co-relation 4470. Up to 1140 conditions per place. [2023-01-28 06:29:14,151 INFO L137 encePairwiseOnDemand]: 203/212 looper letters, 65 selfloop transitions, 37 changer transitions 5/110 dead transitions. [2023-01-28 06:29:14,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 110 transitions, 795 flow [2023-01-28 06:29:14,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 06:29:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 06:29:14,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 618 transitions. [2023-01-28 06:29:14,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164420485175202 [2023-01-28 06:29:14,153 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 618 transitions. [2023-01-28 06:29:14,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 618 transitions. [2023-01-28 06:29:14,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:29:14,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 618 transitions. [2023-01-28 06:29:14,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:14,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:14,157 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:14,157 INFO L175 Difference]: Start difference. First operand has 41 places, 45 transitions, 240 flow. Second operand 7 states and 618 transitions. [2023-01-28 06:29:14,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 110 transitions, 795 flow [2023-01-28 06:29:14,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 110 transitions, 795 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 06:29:14,164 INFO L231 Difference]: Finished difference. Result has 52 places, 76 transitions, 638 flow [2023-01-28 06:29:14,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=638, PETRI_PLACES=52, PETRI_TRANSITIONS=76} [2023-01-28 06:29:14,165 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2023-01-28 06:29:14,166 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 76 transitions, 638 flow [2023-01-28 06:29:14,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:14,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:29:14,166 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:29:14,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 06:29:14,167 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:29:14,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:29:14,169 INFO L85 PathProgramCache]: Analyzing trace with hash -992714895, now seen corresponding path program 1 times [2023-01-28 06:29:14,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:29:14,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339408515] [2023-01-28 06:29:14,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:29:14,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:29:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:29:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:29:14,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:29:14,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339408515] [2023-01-28 06:29:14,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339408515] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:29:14,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:29:14,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 06:29:14,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047466033] [2023-01-28 06:29:14,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:29:14,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 06:29:14,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:29:14,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 06:29:14,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 06:29:14,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 212 [2023-01-28 06:29:14,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 76 transitions, 638 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:14,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:29:14,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 212 [2023-01-28 06:29:14,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:29:14,529 INFO L130 PetriNetUnfolder]: 1317/2184 cut-off events. [2023-01-28 06:29:14,529 INFO L131 PetriNetUnfolder]: For 4282/4282 co-relation queries the response was YES. [2023-01-28 06:29:14,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7358 conditions, 2184 events. 1317/2184 cut-off events. For 4282/4282 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 12695 event pairs, 701 based on Foata normal form. 22/2199 useless extension candidates. Maximal degree in co-relation 6668. Up to 1724 conditions per place. [2023-01-28 06:29:14,538 INFO L137 encePairwiseOnDemand]: 203/212 looper letters, 101 selfloop transitions, 22 changer transitions 5/131 dead transitions. [2023-01-28 06:29:14,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 131 transitions, 1173 flow [2023-01-28 06:29:14,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 06:29:14,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 06:29:14,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 619 transitions. [2023-01-28 06:29:14,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4171159029649596 [2023-01-28 06:29:14,540 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 619 transitions. [2023-01-28 06:29:14,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 619 transitions. [2023-01-28 06:29:14,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:29:14,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 619 transitions. [2023-01-28 06:29:14,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.42857142857143) internal successors, (619), 7 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:14,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:14,544 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 212.0) internal successors, (1696), 8 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:14,544 INFO L175 Difference]: Start difference. First operand has 52 places, 76 transitions, 638 flow. Second operand 7 states and 619 transitions. [2023-01-28 06:29:14,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 131 transitions, 1173 flow [2023-01-28 06:29:14,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 131 transitions, 1169 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-01-28 06:29:14,552 INFO L231 Difference]: Finished difference. Result has 62 places, 98 transitions, 904 flow [2023-01-28 06:29:14,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=904, PETRI_PLACES=62, PETRI_TRANSITIONS=98} [2023-01-28 06:29:14,554 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 33 predicate places. [2023-01-28 06:29:14,554 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 98 transitions, 904 flow [2023-01-28 06:29:14,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:14,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:29:14,554 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:29:14,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 06:29:14,554 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:29:14,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:29:14,555 INFO L85 PathProgramCache]: Analyzing trace with hash -822015939, now seen corresponding path program 2 times [2023-01-28 06:29:14,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:29:14,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501609454] [2023-01-28 06:29:14,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:29:14,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:29:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:29:14,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:29:14,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:29:14,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501609454] [2023-01-28 06:29:14,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501609454] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:29:14,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:29:14,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 06:29:14,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222833597] [2023-01-28 06:29:14,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:29:14,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 06:29:14,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:29:14,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 06:29:14,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 06:29:14,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 212 [2023-01-28 06:29:14,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 98 transitions, 904 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:14,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:29:14,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 212 [2023-01-28 06:29:14,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:29:14,900 INFO L130 PetriNetUnfolder]: 1617/2676 cut-off events. [2023-01-28 06:29:14,901 INFO L131 PetriNetUnfolder]: For 6922/6922 co-relation queries the response was YES. [2023-01-28 06:29:14,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9781 conditions, 2676 events. 1617/2676 cut-off events. For 6922/6922 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16266 event pairs, 441 based on Foata normal form. 22/2690 useless extension candidates. Maximal degree in co-relation 9216. Up to 1182 conditions per place. [2023-01-28 06:29:14,913 INFO L137 encePairwiseOnDemand]: 203/212 looper letters, 105 selfloop transitions, 51 changer transitions 6/165 dead transitions. [2023-01-28 06:29:14,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 165 transitions, 1715 flow [2023-01-28 06:29:14,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 06:29:14,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 06:29:14,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 537 transitions. [2023-01-28 06:29:14,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4221698113207547 [2023-01-28 06:29:14,914 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 537 transitions. [2023-01-28 06:29:14,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 537 transitions. [2023-01-28 06:29:14,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:29:14,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 537 transitions. [2023-01-28 06:29:14,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:14,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:14,917 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 212.0) internal successors, (1484), 7 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:14,917 INFO L175 Difference]: Start difference. First operand has 62 places, 98 transitions, 904 flow. Second operand 6 states and 537 transitions. [2023-01-28 06:29:14,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 165 transitions, 1715 flow [2023-01-28 06:29:14,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 165 transitions, 1665 flow, removed 25 selfloop flow, removed 0 redundant places. [2023-01-28 06:29:14,938 INFO L231 Difference]: Finished difference. Result has 72 places, 123 transitions, 1333 flow [2023-01-28 06:29:14,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1333, PETRI_PLACES=72, PETRI_TRANSITIONS=123} [2023-01-28 06:29:14,939 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 43 predicate places. [2023-01-28 06:29:14,939 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 123 transitions, 1333 flow [2023-01-28 06:29:14,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:14,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:29:14,940 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:29:14,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 06:29:14,940 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:29:14,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:29:14,940 INFO L85 PathProgramCache]: Analyzing trace with hash 447898056, now seen corresponding path program 1 times [2023-01-28 06:29:14,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:29:14,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416381384] [2023-01-28 06:29:14,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:29:14,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:29:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:29:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:29:14,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:29:14,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416381384] [2023-01-28 06:29:14,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416381384] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:29:14,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:29:14,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 06:29:14,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205750379] [2023-01-28 06:29:14,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:29:14,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:29:14,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:29:14,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:29:14,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:29:14,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 212 [2023-01-28 06:29:14,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 123 transitions, 1333 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:14,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:29:14,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 212 [2023-01-28 06:29:14,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:29:15,118 INFO L130 PetriNetUnfolder]: 668/1209 cut-off events. [2023-01-28 06:29:15,118 INFO L131 PetriNetUnfolder]: For 4240/4244 co-relation queries the response was YES. [2023-01-28 06:29:15,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4710 conditions, 1209 events. 668/1209 cut-off events. For 4240/4244 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6488 event pairs, 310 based on Foata normal form. 4/1202 useless extension candidates. Maximal degree in co-relation 4618. Up to 799 conditions per place. [2023-01-28 06:29:15,122 INFO L137 encePairwiseOnDemand]: 208/212 looper letters, 0 selfloop transitions, 0 changer transitions 103/103 dead transitions. [2023-01-28 06:29:15,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 103 transitions, 1116 flow [2023-01-28 06:29:15,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:29:15,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:29:15,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2023-01-28 06:29:15,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48742138364779874 [2023-01-28 06:29:15,124 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2023-01-28 06:29:15,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2023-01-28 06:29:15,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:29:15,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2023-01-28 06:29:15,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:15,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:15,125 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:15,125 INFO L175 Difference]: Start difference. First operand has 72 places, 123 transitions, 1333 flow. Second operand 3 states and 310 transitions. [2023-01-28 06:29:15,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 103 transitions, 1116 flow [2023-01-28 06:29:15,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 103 transitions, 967 flow, removed 39 selfloop flow, removed 8 redundant places. [2023-01-28 06:29:15,145 INFO L231 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2023-01-28 06:29:15,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=212, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=64, PETRI_TRANSITIONS=0} [2023-01-28 06:29:15,145 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 35 predicate places. [2023-01-28 06:29:15,145 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2023-01-28 06:29:15,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:15,146 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 06:29:15,146 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-01-28 06:29:15,146 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-01-28 06:29:15,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 06:29:15,146 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2023-01-28 06:29:15,146 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-01-28 06:29:15,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 111 transitions, 234 flow [2023-01-28 06:29:15,153 INFO L130 PetriNetUnfolder]: 13/133 cut-off events. [2023-01-28 06:29:15,154 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:29:15,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 13/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-01-28 06:29:15,154 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 111 transitions, 234 flow [2023-01-28 06:29:15,154 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 111 transitions, 234 flow [2023-01-28 06:29:15,155 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:29:15,155 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 111 transitions, 234 flow [2023-01-28 06:29:15,155 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 111 transitions, 234 flow [2023-01-28 06:29:15,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 111 transitions, 234 flow [2023-01-28 06:29:15,160 INFO L130 PetriNetUnfolder]: 13/133 cut-off events. [2023-01-28 06:29:15,161 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:29:15,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 133 events. 13/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 88. Up to 6 conditions per place. [2023-01-28 06:29:15,162 INFO L119 LiptonReduction]: Number of co-enabled transitions 4940 [2023-01-28 06:29:16,488 INFO L134 LiptonReduction]: Checked pairs total: 8245 [2023-01-28 06:29:16,488 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-01-28 06:29:16,489 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-01-28 06:29:16,489 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=false, 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;@1081f330, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:29:16,489 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-01-28 06:29:16,491 INFO L130 PetriNetUnfolder]: 2/27 cut-off events. [2023-01-28 06:29:16,491 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 06:29:16,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:29:16,491 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-28 06:29:16,491 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 06:29:16,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:29:16,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1514129062, now seen corresponding path program 1 times [2023-01-28 06:29:16,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:29:16,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523691027] [2023-01-28 06:29:16,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:29:16,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:29:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:29:16,498 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-28 06:29:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-28 06:29:16,503 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-28 06:29:16,503 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-28 06:29:16,503 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-01-28 06:29:16,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 06:29:16,504 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-01-28 06:29:16,504 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-01-28 06:29:16,504 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-28 06:29:16,504 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-28 06:29:16,517 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-28 06:29:16,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 150 transitions, 321 flow [2023-01-28 06:29:16,544 INFO L130 PetriNetUnfolder]: 19/184 cut-off events. [2023-01-28 06:29:16,544 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 06:29:16,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 184 events. 19/184 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 421 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 137. Up to 8 conditions per place. [2023-01-28 06:29:16,544 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 150 transitions, 321 flow [2023-01-28 06:29:16,545 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 150 transitions, 321 flow [2023-01-28 06:29:16,545 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 06:29:16,545 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 150 transitions, 321 flow [2023-01-28 06:29:16,546 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 150 transitions, 321 flow [2023-01-28 06:29:16,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 150 transitions, 321 flow [2023-01-28 06:29:16,555 INFO L130 PetriNetUnfolder]: 19/184 cut-off events. [2023-01-28 06:29:16,555 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 06:29:16,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 184 events. 19/184 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 421 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 137. Up to 8 conditions per place. [2023-01-28 06:29:16,559 INFO L119 LiptonReduction]: Number of co-enabled transitions 11856 [2023-01-28 06:29:18,243 INFO L134 LiptonReduction]: Checked pairs total: 20368 [2023-01-28 06:29:18,244 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-01-28 06:29:18,246 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 06:29:18,246 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=false, 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;@1081f330, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 06:29:18,246 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 06:29:18,248 INFO L130 PetriNetUnfolder]: 2/23 cut-off events. [2023-01-28 06:29:18,248 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-28 06:29:18,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:29:18,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:29:18,248 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:29:18,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:29:18,249 INFO L85 PathProgramCache]: Analyzing trace with hash -26515803, now seen corresponding path program 1 times [2023-01-28 06:29:18,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:29:18,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539309783] [2023-01-28 06:29:18,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:29:18,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:29:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:29:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 06:29:18,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:29:18,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539309783] [2023-01-28 06:29:18,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539309783] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:29:18,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:29:18,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:29:18,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76890200] [2023-01-28 06:29:18,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:29:18,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:29:18,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:29:18,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:29:18,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:29:18,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 288 [2023-01-28 06:29:18,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:18,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:29:18,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 288 [2023-01-28 06:29:18,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:29:18,673 INFO L130 PetriNetUnfolder]: 6403/8855 cut-off events. [2023-01-28 06:29:18,673 INFO L131 PetriNetUnfolder]: For 787/787 co-relation queries the response was YES. [2023-01-28 06:29:18,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18191 conditions, 8855 events. 6403/8855 cut-off events. For 787/787 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 47938 event pairs, 3065 based on Foata normal form. 0/6602 useless extension candidates. Maximal degree in co-relation 6462. Up to 5896 conditions per place. [2023-01-28 06:29:18,714 INFO L137 encePairwiseOnDemand]: 280/288 looper letters, 56 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2023-01-28 06:29:18,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 287 flow [2023-01-28 06:29:18,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:29:18,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:29:18,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2023-01-28 06:29:18,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45023148148148145 [2023-01-28 06:29:18,716 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2023-01-28 06:29:18,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2023-01-28 06:29:18,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:29:18,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2023-01-28 06:29:18,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:18,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:18,718 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:18,718 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 99 flow. Second operand 3 states and 389 transitions. [2023-01-28 06:29:18,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 287 flow [2023-01-28 06:29:18,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 65 transitions, 279 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-01-28 06:29:18,720 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 133 flow [2023-01-28 06:29:18,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2023-01-28 06:29:18,721 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-01-28 06:29:18,721 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 133 flow [2023-01-28 06:29:18,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:18,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:29:18,721 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:29:18,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-28 06:29:18,722 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:29:18,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:29:18,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1801319534, now seen corresponding path program 1 times [2023-01-28 06:29:18,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:29:18,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569768487] [2023-01-28 06:29:18,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:29:18,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:29:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:29:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:29:18,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:29:18,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569768487] [2023-01-28 06:29:18,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569768487] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:29:18,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:29:18,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:29:18,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735620583] [2023-01-28 06:29:18,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:29:18,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:29:18,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:29:18,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:29:18,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:29:18,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 288 [2023-01-28 06:29:18,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:18,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:29:18,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 288 [2023-01-28 06:29:18,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:29:19,367 INFO L130 PetriNetUnfolder]: 9575/13279 cut-off events. [2023-01-28 06:29:19,368 INFO L131 PetriNetUnfolder]: For 4918/4918 co-relation queries the response was YES. [2023-01-28 06:29:19,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30757 conditions, 13279 events. 9575/13279 cut-off events. For 4918/4918 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 75228 event pairs, 4266 based on Foata normal form. 0/11115 useless extension candidates. Maximal degree in co-relation 22358. Up to 8137 conditions per place. [2023-01-28 06:29:19,502 INFO L137 encePairwiseOnDemand]: 281/288 looper letters, 61 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2023-01-28 06:29:19,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 72 transitions, 364 flow [2023-01-28 06:29:19,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:29:19,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:29:19,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 387 transitions. [2023-01-28 06:29:19,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479166666666667 [2023-01-28 06:29:19,503 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 387 transitions. [2023-01-28 06:29:19,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 387 transitions. [2023-01-28 06:29:19,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:29:19,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 387 transitions. [2023-01-28 06:29:19,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:19,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:19,505 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:19,505 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 133 flow. Second operand 3 states and 387 transitions. [2023-01-28 06:29:19,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 72 transitions, 364 flow [2023-01-28 06:29:19,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 72 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 06:29:19,512 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 181 flow [2023-01-28 06:29:19,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2023-01-28 06:29:19,516 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2023-01-28 06:29:19,516 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 181 flow [2023-01-28 06:29:19,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:19,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:29:19,516 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:29:19,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 06:29:19,517 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:29:19,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:29:19,517 INFO L85 PathProgramCache]: Analyzing trace with hash -2131348444, now seen corresponding path program 1 times [2023-01-28 06:29:19,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:29:19,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867796676] [2023-01-28 06:29:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:29:19,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:29:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:29:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 06:29:19,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:29:19,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867796676] [2023-01-28 06:29:19,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867796676] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:29:19,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:29:19,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 06:29:19,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464133903] [2023-01-28 06:29:19,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:29:19,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:29:19,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:29:19,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:29:19,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:29:19,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 288 [2023-01-28 06:29:19,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:19,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:29:19,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 288 [2023-01-28 06:29:19,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:29:20,469 INFO L130 PetriNetUnfolder]: 13315/18407 cut-off events. [2023-01-28 06:29:20,470 INFO L131 PetriNetUnfolder]: For 9524/9524 co-relation queries the response was YES. [2023-01-28 06:29:20,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45608 conditions, 18407 events. 13315/18407 cut-off events. For 9524/9524 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 107894 event pairs, 6049 based on Foata normal form. 0/15995 useless extension candidates. Maximal degree in co-relation 33534. Up to 11232 conditions per place. [2023-01-28 06:29:20,531 INFO L137 encePairwiseOnDemand]: 281/288 looper letters, 65 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2023-01-28 06:29:20,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 79 transitions, 449 flow [2023-01-28 06:29:20,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:29:20,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:29:20,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 386 transitions. [2023-01-28 06:29:20,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44675925925925924 [2023-01-28 06:29:20,533 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 386 transitions. [2023-01-28 06:29:20,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 386 transitions. [2023-01-28 06:29:20,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:29:20,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 386 transitions. [2023-01-28 06:29:20,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:20,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:20,535 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:20,535 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 181 flow. Second operand 3 states and 386 transitions. [2023-01-28 06:29:20,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 79 transitions, 449 flow [2023-01-28 06:29:20,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 79 transitions, 421 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 06:29:20,551 INFO L231 Difference]: Finished difference. Result has 47 places, 53 transitions, 251 flow [2023-01-28 06:29:20,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=251, PETRI_PLACES=47, PETRI_TRANSITIONS=53} [2023-01-28 06:29:20,552 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 7 predicate places. [2023-01-28 06:29:20,552 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 53 transitions, 251 flow [2023-01-28 06:29:20,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:20,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:29:20,552 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:29:20,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-28 06:29:20,552 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:29:20,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:29:20,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1250805983, now seen corresponding path program 1 times [2023-01-28 06:29:20,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:29:20,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963345967] [2023-01-28 06:29:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:29:20,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:29:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:29:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:29:20,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:29:20,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963345967] [2023-01-28 06:29:20,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963345967] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:29:20,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:29:20,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 06:29:20,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10584143] [2023-01-28 06:29:20,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:29:20,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 06:29:20,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:29:20,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 06:29:20,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 06:29:20,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 288 [2023-01-28 06:29:20,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 53 transitions, 251 flow. Second operand has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:20,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:29:20,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 288 [2023-01-28 06:29:20,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:29:22,297 INFO L130 PetriNetUnfolder]: 21666/30040 cut-off events. [2023-01-28 06:29:22,297 INFO L131 PetriNetUnfolder]: For 20006/20006 co-relation queries the response was YES. [2023-01-28 06:29:22,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79623 conditions, 30040 events. 21666/30040 cut-off events. For 20006/20006 co-relation queries the response was YES. Maximal size of possible extension queue 1241. Compared 189511 event pairs, 7151 based on Foata normal form. 0/26843 useless extension candidates. Maximal degree in co-relation 66828. Up to 12778 conditions per place. [2023-01-28 06:29:22,426 INFO L137 encePairwiseOnDemand]: 277/288 looper letters, 146 selfloop transitions, 39 changer transitions 0/188 dead transitions. [2023-01-28 06:29:22,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 188 transitions, 1190 flow [2023-01-28 06:29:22,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 06:29:22,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 06:29:22,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 888 transitions. [2023-01-28 06:29:22,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2023-01-28 06:29:22,428 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 888 transitions. [2023-01-28 06:29:22,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 888 transitions. [2023-01-28 06:29:22,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:29:22,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 888 transitions. [2023-01-28 06:29:22,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 126.85714285714286) internal successors, (888), 7 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:22,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:22,432 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:22,432 INFO L175 Difference]: Start difference. First operand has 47 places, 53 transitions, 251 flow. Second operand 7 states and 888 transitions. [2023-01-28 06:29:22,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 188 transitions, 1190 flow [2023-01-28 06:29:22,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 188 transitions, 1112 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 06:29:22,499 INFO L231 Difference]: Finished difference. Result has 57 places, 84 transitions, 603 flow [2023-01-28 06:29:22,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=603, PETRI_PLACES=57, PETRI_TRANSITIONS=84} [2023-01-28 06:29:22,500 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 17 predicate places. [2023-01-28 06:29:22,500 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 84 transitions, 603 flow [2023-01-28 06:29:22,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:22,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:29:22,501 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:29:22,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-28 06:29:22,501 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:29:22,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:29:22,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1259429587, now seen corresponding path program 2 times [2023-01-28 06:29:22,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:29:22,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907913021] [2023-01-28 06:29:22,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:29:22,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:29:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:29:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:29:22,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:29:22,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907913021] [2023-01-28 06:29:22,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907913021] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:29:22,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:29:22,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 06:29:22,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044919559] [2023-01-28 06:29:22,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:29:22,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 06:29:22,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:29:22,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 06:29:22,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 06:29:22,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 288 [2023-01-28 06:29:22,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 84 transitions, 603 flow. Second operand has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:22,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:29:22,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 288 [2023-01-28 06:29:22,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:29:25,632 INFO L130 PetriNetUnfolder]: 34407/48051 cut-off events. [2023-01-28 06:29:25,632 INFO L131 PetriNetUnfolder]: For 73582/73582 co-relation queries the response was YES. [2023-01-28 06:29:25,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145372 conditions, 48051 events. 34407/48051 cut-off events. For 73582/73582 co-relation queries the response was YES. Maximal size of possible extension queue 2065. Compared 325400 event pairs, 15547 based on Foata normal form. 374/43897 useless extension candidates. Maximal degree in co-relation 130796. Up to 29630 conditions per place. [2023-01-28 06:29:25,859 INFO L137 encePairwiseOnDemand]: 277/288 looper letters, 192 selfloop transitions, 90 changer transitions 0/285 dead transitions. [2023-01-28 06:29:25,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 285 transitions, 2382 flow [2023-01-28 06:29:25,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 06:29:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 06:29:25,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1007 transitions. [2023-01-28 06:29:25,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4370659722222222 [2023-01-28 06:29:25,861 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1007 transitions. [2023-01-28 06:29:25,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1007 transitions. [2023-01-28 06:29:25,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:29:25,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1007 transitions. [2023-01-28 06:29:25,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 125.875) internal successors, (1007), 8 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:25,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:25,866 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:25,866 INFO L175 Difference]: Start difference. First operand has 57 places, 84 transitions, 603 flow. Second operand 8 states and 1007 transitions. [2023-01-28 06:29:25,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 285 transitions, 2382 flow [2023-01-28 06:29:26,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 285 transitions, 2382 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 06:29:26,082 INFO L231 Difference]: Finished difference. Result has 70 places, 169 transitions, 1838 flow [2023-01-28 06:29:26,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1838, PETRI_PLACES=70, PETRI_TRANSITIONS=169} [2023-01-28 06:29:26,082 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 30 predicate places. [2023-01-28 06:29:26,082 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 169 transitions, 1838 flow [2023-01-28 06:29:26,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:26,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:29:26,083 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:29:26,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-01-28 06:29:26,083 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:29:26,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:29:26,083 INFO L85 PathProgramCache]: Analyzing trace with hash -558021625, now seen corresponding path program 1 times [2023-01-28 06:29:26,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:29:26,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728109501] [2023-01-28 06:29:26,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:29:26,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:29:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:29:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:29:26,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:29:26,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728109501] [2023-01-28 06:29:26,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728109501] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:29:26,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:29:26,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 06:29:26,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803732579] [2023-01-28 06:29:26,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:29:26,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 06:29:26,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:29:26,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 06:29:26,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 06:29:26,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 288 [2023-01-28 06:29:26,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 169 transitions, 1838 flow. Second operand has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:26,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:29:26,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 288 [2023-01-28 06:29:26,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:29:31,127 INFO L130 PetriNetUnfolder]: 46600/65359 cut-off events. [2023-01-28 06:29:31,128 INFO L131 PetriNetUnfolder]: For 183502/183502 co-relation queries the response was YES. [2023-01-28 06:29:31,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223237 conditions, 65359 events. 46600/65359 cut-off events. For 183502/183502 co-relation queries the response was YES. Maximal size of possible extension queue 3014. Compared 468711 event pairs, 24306 based on Foata normal form. 344/59177 useless extension candidates. Maximal degree in co-relation 207370. Up to 47899 conditions per place. [2023-01-28 06:29:31,528 INFO L137 encePairwiseOnDemand]: 277/288 looper letters, 283 selfloop transitions, 71 changer transitions 0/357 dead transitions. [2023-01-28 06:29:31,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 357 transitions, 3830 flow [2023-01-28 06:29:31,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 06:29:31,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 06:29:31,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1010 transitions. [2023-01-28 06:29:31,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383680555555556 [2023-01-28 06:29:31,530 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1010 transitions. [2023-01-28 06:29:31,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1010 transitions. [2023-01-28 06:29:31,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:29:31,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1010 transitions. [2023-01-28 06:29:31,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 126.25) internal successors, (1010), 8 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:31,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:31,535 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 288.0) internal successors, (2592), 9 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:31,535 INFO L175 Difference]: Start difference. First operand has 70 places, 169 transitions, 1838 flow. Second operand 8 states and 1010 transitions. [2023-01-28 06:29:31,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 357 transitions, 3830 flow [2023-01-28 06:29:33,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 357 transitions, 3752 flow, removed 39 selfloop flow, removed 0 redundant places. [2023-01-28 06:29:33,041 INFO L231 Difference]: Finished difference. Result has 83 places, 240 transitions, 2942 flow [2023-01-28 06:29:33,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2942, PETRI_PLACES=83, PETRI_TRANSITIONS=240} [2023-01-28 06:29:33,042 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 43 predicate places. [2023-01-28 06:29:33,042 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 240 transitions, 2942 flow [2023-01-28 06:29:33,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:33,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:29:33,042 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:29:33,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-01-28 06:29:33,042 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:29:33,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:29:33,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1258536795, now seen corresponding path program 2 times [2023-01-28 06:29:33,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:29:33,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323243330] [2023-01-28 06:29:33,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:29:33,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:29:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:29:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:29:33,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:29:33,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323243330] [2023-01-28 06:29:33,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323243330] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:29:33,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:29:33,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 06:29:33,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135427634] [2023-01-28 06:29:33,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:29:33,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 06:29:33,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:29:33,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 06:29:33,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 06:29:33,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 288 [2023-01-28 06:29:33,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 240 transitions, 2942 flow. Second operand has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:33,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:29:33,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 288 [2023-01-28 06:29:33,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:29:40,888 INFO L130 PetriNetUnfolder]: 60710/85146 cut-off events. [2023-01-28 06:29:40,888 INFO L131 PetriNetUnfolder]: For 331797/331797 co-relation queries the response was YES. [2023-01-28 06:29:41,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311973 conditions, 85146 events. 60710/85146 cut-off events. For 331797/331797 co-relation queries the response was YES. Maximal size of possible extension queue 4188. Compared 632587 event pairs, 18404 based on Foata normal form. 330/76500 useless extension candidates. Maximal degree in co-relation 294571. Up to 36253 conditions per place. [2023-01-28 06:29:41,697 INFO L137 encePairwiseOnDemand]: 277/288 looper letters, 280 selfloop transitions, 160 changer transitions 0/443 dead transitions. [2023-01-28 06:29:41,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 443 transitions, 5628 flow [2023-01-28 06:29:41,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 06:29:41,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 06:29:41,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 889 transitions. [2023-01-28 06:29:41,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409722222222222 [2023-01-28 06:29:41,716 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 889 transitions. [2023-01-28 06:29:41,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 889 transitions. [2023-01-28 06:29:41,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:29:41,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 889 transitions. [2023-01-28 06:29:41,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 127.0) internal successors, (889), 7 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:41,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:41,719 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:41,719 INFO L175 Difference]: Start difference. First operand has 83 places, 240 transitions, 2942 flow. Second operand 7 states and 889 transitions. [2023-01-28 06:29:41,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 443 transitions, 5628 flow [2023-01-28 06:29:46,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 443 transitions, 5374 flow, removed 127 selfloop flow, removed 0 redundant places. [2023-01-28 06:29:46,226 INFO L231 Difference]: Finished difference. Result has 95 places, 315 transitions, 4499 flow [2023-01-28 06:29:46,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=2796, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4499, PETRI_PLACES=95, PETRI_TRANSITIONS=315} [2023-01-28 06:29:46,226 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 55 predicate places. [2023-01-28 06:29:46,226 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 315 transitions, 4499 flow [2023-01-28 06:29:46,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:46,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:29:46,227 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:29:46,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-01-28 06:29:46,227 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:29:46,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:29:46,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1441415360, now seen corresponding path program 1 times [2023-01-28 06:29:46,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:29:46,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772322425] [2023-01-28 06:29:46,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:29:46,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:29:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:29:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 06:29:46,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:29:46,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772322425] [2023-01-28 06:29:46,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772322425] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:29:46,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:29:46,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 06:29:46,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312447593] [2023-01-28 06:29:46,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:29:46,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 06:29:46,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:29:46,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 06:29:46,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 06:29:46,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 288 [2023-01-28 06:29:46,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 315 transitions, 4499 flow. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:46,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:29:46,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 288 [2023-01-28 06:29:46,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:29:50,058 INFO L130 PetriNetUnfolder]: 24061/37396 cut-off events. [2023-01-28 06:29:50,058 INFO L131 PetriNetUnfolder]: For 207103/207281 co-relation queries the response was YES. [2023-01-28 06:29:50,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141741 conditions, 37396 events. 24061/37396 cut-off events. For 207103/207281 co-relation queries the response was YES. Maximal size of possible extension queue 1889. Compared 291790 event pairs, 11013 based on Foata normal form. 1250/33732 useless extension candidates. Maximal degree in co-relation 128523. Up to 22234 conditions per place. [2023-01-28 06:29:50,306 INFO L137 encePairwiseOnDemand]: 282/288 looper letters, 159 selfloop transitions, 37 changer transitions 0/295 dead transitions. [2023-01-28 06:29:50,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 295 transitions, 4196 flow [2023-01-28 06:29:50,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 06:29:50,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 06:29:50,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2023-01-28 06:29:50,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49189814814814814 [2023-01-28 06:29:50,308 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2023-01-28 06:29:50,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2023-01-28 06:29:50,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:29:50,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2023-01-28 06:29:50,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:50,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:50,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:50,310 INFO L175 Difference]: Start difference. First operand has 95 places, 315 transitions, 4499 flow. Second operand 3 states and 425 transitions. [2023-01-28 06:29:50,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 295 transitions, 4196 flow [2023-01-28 06:29:52,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 295 transitions, 3960 flow, removed 110 selfloop flow, removed 2 redundant places. [2023-01-28 06:29:52,137 INFO L231 Difference]: Finished difference. Result has 95 places, 219 transitions, 2828 flow [2023-01-28 06:29:52,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=2754, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2828, PETRI_PLACES=95, PETRI_TRANSITIONS=219} [2023-01-28 06:29:52,138 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 55 predicate places. [2023-01-28 06:29:52,138 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 219 transitions, 2828 flow [2023-01-28 06:29:52,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:52,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:29:52,138 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:29:52,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-01-28 06:29:52,138 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:29:52,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:29:52,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1341924707, now seen corresponding path program 1 times [2023-01-28 06:29:52,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:29:52,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139272130] [2023-01-28 06:29:52,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:29:52,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:29:52,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:29:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 06:29:52,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:29:52,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139272130] [2023-01-28 06:29:52,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139272130] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:29:52,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:29:52,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 06:29:52,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720258682] [2023-01-28 06:29:52,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:29:52,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 06:29:52,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:29:52,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 06:29:52,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 06:29:52,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 288 [2023-01-28 06:29:52,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 219 transitions, 2828 flow. Second operand has 5 states, 5 states have (on average 108.4) internal successors, (542), 5 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:52,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:29:52,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 288 [2023-01-28 06:29:52,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:29:58,637 INFO L130 PetriNetUnfolder]: 46154/66723 cut-off events. [2023-01-28 06:29:58,637 INFO L131 PetriNetUnfolder]: For 334195/334195 co-relation queries the response was YES. [2023-01-28 06:29:58,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257312 conditions, 66723 events. 46154/66723 cut-off events. For 334195/334195 co-relation queries the response was YES. Maximal size of possible extension queue 2804. Compared 497901 event pairs, 14877 based on Foata normal form. 718/58798 useless extension candidates. Maximal degree in co-relation 252281. Up to 27216 conditions per place. [2023-01-28 06:29:59,148 INFO L137 encePairwiseOnDemand]: 277/288 looper letters, 356 selfloop transitions, 166 changer transitions 1/526 dead transitions. [2023-01-28 06:29:59,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 526 transitions, 7323 flow [2023-01-28 06:29:59,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 06:29:59,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 06:29:59,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 878 transitions. [2023-01-28 06:29:59,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435515873015873 [2023-01-28 06:29:59,151 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 878 transitions. [2023-01-28 06:29:59,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 878 transitions. [2023-01-28 06:29:59,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:29:59,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 878 transitions. [2023-01-28 06:29:59,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 125.42857142857143) internal successors, (878), 7 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:59,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:59,154 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:29:59,155 INFO L175 Difference]: Start difference. First operand has 95 places, 219 transitions, 2828 flow. Second operand 7 states and 878 transitions. [2023-01-28 06:29:59,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 526 transitions, 7323 flow [2023-01-28 06:30:01,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 526 transitions, 7131 flow, removed 41 selfloop flow, removed 1 redundant places. [2023-01-28 06:30:01,956 INFO L231 Difference]: Finished difference. Result has 106 places, 320 transitions, 4785 flow [2023-01-28 06:30:01,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4785, PETRI_PLACES=106, PETRI_TRANSITIONS=320} [2023-01-28 06:30:01,956 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 66 predicate places. [2023-01-28 06:30:01,956 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 320 transitions, 4785 flow [2023-01-28 06:30:01,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.4) internal successors, (542), 5 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:30:01,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:30:01,957 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:30:01,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-01-28 06:30:01,957 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:30:01,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:30:01,957 INFO L85 PathProgramCache]: Analyzing trace with hash 218583753, now seen corresponding path program 1 times [2023-01-28 06:30:01,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:30:01,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736981859] [2023-01-28 06:30:01,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:30:01,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:30:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:30:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 06:30:01,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:30:01,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736981859] [2023-01-28 06:30:01,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736981859] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:30:01,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:30:01,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 06:30:01,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085993273] [2023-01-28 06:30:01,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:30:01,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 06:30:01,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:30:01,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 06:30:01,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 06:30:01,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 288 [2023-01-28 06:30:01,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 320 transitions, 4785 flow. Second operand has 5 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:30:01,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:30:01,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 288 [2023-01-28 06:30:01,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:30:11,589 INFO L130 PetriNetUnfolder]: 59329/85862 cut-off events. [2023-01-28 06:30:11,589 INFO L131 PetriNetUnfolder]: For 524511/524511 co-relation queries the response was YES. [2023-01-28 06:30:12,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354488 conditions, 85862 events. 59329/85862 cut-off events. For 524511/524511 co-relation queries the response was YES. Maximal size of possible extension queue 3946. Compared 662668 event pairs, 18630 based on Foata normal form. 684/76073 useless extension candidates. Maximal degree in co-relation 347249. Up to 34433 conditions per place. [2023-01-28 06:30:12,267 INFO L137 encePairwiseOnDemand]: 277/288 looper letters, 484 selfloop transitions, 160 changer transitions 0/647 dead transitions. [2023-01-28 06:30:12,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 647 transitions, 10215 flow [2023-01-28 06:30:12,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 06:30:12,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 06:30:12,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 876 transitions. [2023-01-28 06:30:12,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2023-01-28 06:30:12,269 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 876 transitions. [2023-01-28 06:30:12,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 876 transitions. [2023-01-28 06:30:12,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:30:12,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 876 transitions. [2023-01-28 06:30:12,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 125.14285714285714) internal successors, (876), 7 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:30:12,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:30:12,273 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:30:12,273 INFO L175 Difference]: Start difference. First operand has 106 places, 320 transitions, 4785 flow. Second operand 7 states and 876 transitions. [2023-01-28 06:30:12,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 647 transitions, 10215 flow [2023-01-28 06:30:16,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 647 transitions, 10203 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-01-28 06:30:16,186 INFO L231 Difference]: Finished difference. Result has 118 places, 393 transitions, 6690 flow [2023-01-28 06:30:16,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=4773, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6690, PETRI_PLACES=118, PETRI_TRANSITIONS=393} [2023-01-28 06:30:16,186 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 78 predicate places. [2023-01-28 06:30:16,186 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 393 transitions, 6690 flow [2023-01-28 06:30:16,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:30:16,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:30:16,187 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:30:16,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-01-28 06:30:16,187 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:30:16,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:30:16,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1567051187, now seen corresponding path program 1 times [2023-01-28 06:30:16,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:30:16,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634144682] [2023-01-28 06:30:16,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:30:16,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:30:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:30:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 06:30:16,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:30:16,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634144682] [2023-01-28 06:30:16,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634144682] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:30:16,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:30:16,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 06:30:16,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770235276] [2023-01-28 06:30:16,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:30:16,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 06:30:16,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:30:16,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 06:30:16,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 06:30:16,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 288 [2023-01-28 06:30:16,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 393 transitions, 6690 flow. Second operand has 5 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:30:16,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:30:16,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 288 [2023-01-28 06:30:16,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:30:31,448 INFO L130 PetriNetUnfolder]: 81352/117987 cut-off events. [2023-01-28 06:30:31,449 INFO L131 PetriNetUnfolder]: For 944019/944019 co-relation queries the response was YES. [2023-01-28 06:30:32,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519158 conditions, 117987 events. 81352/117987 cut-off events. For 944019/944019 co-relation queries the response was YES. Maximal size of possible extension queue 5533. Compared 954042 event pairs, 26006 based on Foata normal form. 980/103701 useless extension candidates. Maximal degree in co-relation 509151. Up to 41321 conditions per place. [2023-01-28 06:30:32,525 INFO L137 encePairwiseOnDemand]: 277/288 looper letters, 604 selfloop transitions, 219 changer transitions 1/827 dead transitions. [2023-01-28 06:30:32,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 827 transitions, 14598 flow [2023-01-28 06:30:32,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 06:30:32,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 06:30:32,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 880 transitions. [2023-01-28 06:30:32,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2023-01-28 06:30:32,527 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 880 transitions. [2023-01-28 06:30:32,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 880 transitions. [2023-01-28 06:30:32,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:30:32,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 880 transitions. [2023-01-28 06:30:32,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 125.71428571428571) internal successors, (880), 7 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:30:32,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:30:32,531 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:30:32,531 INFO L175 Difference]: Start difference. First operand has 118 places, 393 transitions, 6690 flow. Second operand 7 states and 880 transitions. [2023-01-28 06:30:32,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 827 transitions, 14598 flow [2023-01-28 06:30:42,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 827 transitions, 14428 flow, removed 85 selfloop flow, removed 0 redundant places. [2023-01-28 06:30:42,202 INFO L231 Difference]: Finished difference. Result has 130 places, 499 transitions, 9268 flow [2023-01-28 06:30:42,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=6369, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9268, PETRI_PLACES=130, PETRI_TRANSITIONS=499} [2023-01-28 06:30:42,203 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 90 predicate places. [2023-01-28 06:30:42,203 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 499 transitions, 9268 flow [2023-01-28 06:30:42,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:30:42,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:30:42,203 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:30:42,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-01-28 06:30:42,203 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:30:42,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:30:42,204 INFO L85 PathProgramCache]: Analyzing trace with hash 59114835, now seen corresponding path program 1 times [2023-01-28 06:30:42,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:30:42,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977173547] [2023-01-28 06:30:42,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:30:42,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:30:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:30:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 06:30:42,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:30:42,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977173547] [2023-01-28 06:30:42,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977173547] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:30:42,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:30:42,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 06:30:42,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325006317] [2023-01-28 06:30:42,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:30:42,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 06:30:42,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:30:42,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 06:30:42,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 06:30:42,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 288 [2023-01-28 06:30:42,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 499 transitions, 9268 flow. Second operand has 5 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:30:42,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:30:42,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 288 [2023-01-28 06:30:42,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 06:31:04,416 INFO L130 PetriNetUnfolder]: 101988/147915 cut-off events. [2023-01-28 06:31:04,416 INFO L131 PetriNetUnfolder]: For 1443149/1443149 co-relation queries the response was YES. [2023-01-28 06:31:05,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 689592 conditions, 147915 events. 101988/147915 cut-off events. For 1443149/1443149 co-relation queries the response was YES. Maximal size of possible extension queue 7153. Compared 1230325 event pairs, 29955 based on Foata normal form. 982/129046 useless extension candidates. Maximal degree in co-relation 676103. Up to 62205 conditions per place. [2023-01-28 06:31:05,881 INFO L137 encePairwiseOnDemand]: 277/288 looper letters, 712 selfloop transitions, 255 changer transitions 1/971 dead transitions. [2023-01-28 06:31:05,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 971 transitions, 18756 flow [2023-01-28 06:31:05,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 06:31:05,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 06:31:05,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 879 transitions. [2023-01-28 06:31:05,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43601190476190477 [2023-01-28 06:31:05,882 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 879 transitions. [2023-01-28 06:31:05,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 879 transitions. [2023-01-28 06:31:05,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 06:31:05,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 879 transitions. [2023-01-28 06:31:05,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 125.57142857142857) internal successors, (879), 7 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:05,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:05,886 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 288.0) internal successors, (2304), 8 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:05,886 INFO L175 Difference]: Start difference. First operand has 130 places, 499 transitions, 9268 flow. Second operand 7 states and 879 transitions. [2023-01-28 06:31:05,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 971 transitions, 18756 flow [2023-01-28 06:31:20,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 971 transitions, 18644 flow, removed 56 selfloop flow, removed 0 redundant places. [2023-01-28 06:31:20,067 INFO L231 Difference]: Finished difference. Result has 142 places, 607 transitions, 12569 flow [2023-01-28 06:31:20,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=9118, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12569, PETRI_PLACES=142, PETRI_TRANSITIONS=607} [2023-01-28 06:31:20,068 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 102 predicate places. [2023-01-28 06:31:20,068 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 607 transitions, 12569 flow [2023-01-28 06:31:20,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.2) internal successors, (541), 5 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:20,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 06:31:20,069 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 06:31:20,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-01-28 06:31:20,069 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-01-28 06:31:20,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 06:31:20,069 INFO L85 PathProgramCache]: Analyzing trace with hash 285113267, now seen corresponding path program 1 times [2023-01-28 06:31:20,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 06:31:20,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249108448] [2023-01-28 06:31:20,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 06:31:20,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 06:31:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 06:31:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 06:31:20,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 06:31:20,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249108448] [2023-01-28 06:31:20,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249108448] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 06:31:20,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 06:31:20,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-28 06:31:20,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827127803] [2023-01-28 06:31:20,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 06:31:20,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 06:31:20,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 06:31:20,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 06:31:20,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-01-28 06:31:20,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 288 [2023-01-28 06:31:20,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 607 transitions, 12569 flow. Second operand has 7 states, 7 states have (on average 105.14285714285714) internal successors, (736), 7 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 06:31:20,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 06:31:20,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 288 [2023-01-28 06:31:20,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand