/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/weaver/popl20-more-buffer-mult2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 10:51:12,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 10:51:12,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 10:51:12,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 10:51:12,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 10:51:12,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 10:51:12,488 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 10:51:12,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 10:51:12,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 10:51:12,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 10:51:12,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 10:51:12,496 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 10:51:12,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 10:51:12,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 10:51:12,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 10:51:12,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 10:51:12,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 10:51:12,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 10:51:12,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 10:51:12,507 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 10:51:12,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 10:51:12,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 10:51:12,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 10:51:12,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 10:51:12,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 10:51:12,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 10:51:12,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 10:51:12,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 10:51:12,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 10:51:12,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 10:51:12,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 10:51:12,519 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 10:51:12,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 10:51:12,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 10:51:12,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 10:51:12,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 10:51:12,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 10:51:12,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 10:51:12,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 10:51:12,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 10:51:12,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 10:51:12,523 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 10:51:12,545 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 10:51:12,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 10:51:12,546 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 10:51:12,546 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 10:51:12,547 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 10:51:12,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 10:51:12,547 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 10:51:12,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 10:51:12,547 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 10:51:12,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 10:51:12,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 10:51:12,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 10:51:12,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 10:51:12,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 10:51:12,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 10:51:12,549 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 10:51:12,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 10:51:12,549 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 10:51:12,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 10:51:12,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 10:51:12,549 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 10:51:12,549 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 10:51:12,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 10:51:12,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 10:51:12,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 10:51:12,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 10:51:12,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 10:51:12,550 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 10:51:12,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 10:51:12,550 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 10:51:12,550 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 10:51:12,550 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 10:51:12,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 10:51:12,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 10:51:12,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 10:51:12,782 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 10:51:12,783 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 10:51:12,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2023-01-28 10:51:13,781 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 10:51:13,916 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 10:51:13,916 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2023-01-28 10:51:13,925 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1ca47eaa/98f76af3ca834d3f8191d95310a7684c/FLAG411c0c623 [2023-01-28 10:51:13,936 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1ca47eaa/98f76af3ca834d3f8191d95310a7684c [2023-01-28 10:51:13,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 10:51:13,938 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 10:51:13,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 10:51:13,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 10:51:13,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 10:51:13,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 10:51:13" (1/1) ... [2023-01-28 10:51:13,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b54b669 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:51:13, skipping insertion in model container [2023-01-28 10:51:13,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 10:51:13" (1/1) ... [2023-01-28 10:51:13,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 10:51:13,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 10:51:14,115 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2023-01-28 10:51:14,125 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 10:51:14,132 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 10:51:14,152 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2023-01-28 10:51:14,155 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 10:51:14,172 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 10:51:14,172 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 10:51:14,177 INFO L208 MainTranslator]: Completed translation [2023-01-28 10:51:14,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:51:14 WrapperNode [2023-01-28 10:51:14,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 10:51:14,178 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 10:51:14,178 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 10:51:14,178 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 10:51:14,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:51:14" (1/1) ... [2023-01-28 10:51:14,191 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:51:14" (1/1) ... [2023-01-28 10:51:14,212 INFO L138 Inliner]: procedures = 27, calls = 76, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 311 [2023-01-28 10:51:14,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 10:51:14,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 10:51:14,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 10:51:14,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 10:51:14,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:51:14" (1/1) ... [2023-01-28 10:51:14,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:51:14" (1/1) ... [2023-01-28 10:51:14,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:51:14" (1/1) ... [2023-01-28 10:51:14,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:51:14" (1/1) ... [2023-01-28 10:51:14,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:51:14" (1/1) ... [2023-01-28 10:51:14,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:51:14" (1/1) ... [2023-01-28 10:51:14,244 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:51:14" (1/1) ... [2023-01-28 10:51:14,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:51:14" (1/1) ... [2023-01-28 10:51:14,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 10:51:14,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 10:51:14,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 10:51:14,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 10:51:14,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:51:14" (1/1) ... [2023-01-28 10:51:14,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 10:51:14,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:51:14,270 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 10:51:14,271 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 10:51:14,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 10:51:14,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 10:51:14,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 10:51:14,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 10:51:14,295 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 10:51:14,296 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 10:51:14,296 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 10:51:14,296 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 10:51:14,296 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-28 10:51:14,296 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-28 10:51:14,296 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-01-28 10:51:14,296 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-01-28 10:51:14,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 10:51:14,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 10:51:14,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 10:51:14,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 10:51:14,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 10:51:14,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 10:51:14,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 10:51:14,298 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 10:51:14,373 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 10:51:14,375 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 10:51:14,715 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 10:51:14,826 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 10:51:14,826 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-01-28 10:51:14,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 10:51:14 BoogieIcfgContainer [2023-01-28 10:51:14,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 10:51:14,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 10:51:14,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 10:51:14,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 10:51:14,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 10:51:13" (1/3) ... [2023-01-28 10:51:14,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36cf88b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 10:51:14, skipping insertion in model container [2023-01-28 10:51:14,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:51:14" (2/3) ... [2023-01-28 10:51:14,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36cf88b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 10:51:14, skipping insertion in model container [2023-01-28 10:51:14,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 10:51:14" (3/3) ... [2023-01-28 10:51:14,833 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult2.wvr.c [2023-01-28 10:51:14,845 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 10:51:14,845 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 10:51:14,845 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 10:51:14,906 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 10:51:14,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 220 transitions, 472 flow [2023-01-28 10:51:14,999 INFO L130 PetriNetUnfolder]: 18/216 cut-off events. [2023-01-28 10:51:14,999 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 10:51:15,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 216 events. 18/216 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 114 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 179. Up to 2 conditions per place. [2023-01-28 10:51:15,004 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 220 transitions, 472 flow [2023-01-28 10:51:15,011 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 204 transitions, 432 flow [2023-01-28 10:51:15,015 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 10:51:15,027 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 204 transitions, 432 flow [2023-01-28 10:51:15,030 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 204 transitions, 432 flow [2023-01-28 10:51:15,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 204 transitions, 432 flow [2023-01-28 10:51:15,079 INFO L130 PetriNetUnfolder]: 18/204 cut-off events. [2023-01-28 10:51:15,080 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 10:51:15,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 204 events. 18/204 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 115 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 179. Up to 2 conditions per place. [2023-01-28 10:51:15,083 INFO L119 LiptonReduction]: Number of co-enabled transitions 1824 [2023-01-28 10:51:21,144 INFO L134 LiptonReduction]: Checked pairs total: 2906 [2023-01-28 10:51:21,144 INFO L136 LiptonReduction]: Total number of compositions: 200 [2023-01-28 10:51:21,154 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 10:51:21,158 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;@1fd0e15d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 10:51:21,159 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-28 10:51:21,163 INFO L130 PetriNetUnfolder]: 6/34 cut-off events. [2023-01-28 10:51:21,163 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 10:51:21,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:51:21,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:51:21,164 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:51:21,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:51:21,172 INFO L85 PathProgramCache]: Analyzing trace with hash -126291369, now seen corresponding path program 1 times [2023-01-28 10:51:21,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:51:21,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124841021] [2023-01-28 10:51:21,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:51:21,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:51:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:51:21,532 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 10:51:21,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:51:21,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124841021] [2023-01-28 10:51:21,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124841021] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:51:21,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:51:21,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 10:51:21,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208429828] [2023-01-28 10:51:21,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:51:21,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 10:51:21,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:51:21,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 10:51:21,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 10:51:21,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 420 [2023-01-28 10:51:21,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 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 10:51:21,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:51:21,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 420 [2023-01-28 10:51:21,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:51:21,848 INFO L130 PetriNetUnfolder]: 1615/2213 cut-off events. [2023-01-28 10:51:21,848 INFO L131 PetriNetUnfolder]: For 145/145 co-relation queries the response was YES. [2023-01-28 10:51:21,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4407 conditions, 2213 events. 1615/2213 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8955 event pairs, 271 based on Foata normal form. 1/1331 useless extension candidates. Maximal degree in co-relation 3408. Up to 1413 conditions per place. [2023-01-28 10:51:21,861 INFO L137 encePairwiseOnDemand]: 416/420 looper letters, 43 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-01-28 10:51:21,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 239 flow [2023-01-28 10:51:21,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 10:51:21,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 10:51:21,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-01-28 10:51:21,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976190476190476 [2023-01-28 10:51:21,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-01-28 10:51:21,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-01-28 10:51:21,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:51:21,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-01-28 10:51:21,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 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 10:51:21,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 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 10:51:21,884 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 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 10:51:21,886 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 94 flow. Second operand 3 states and 627 transitions. [2023-01-28 10:51:21,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 239 flow [2023-01-28 10:51:21,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 53 transitions, 213 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-01-28 10:51:21,892 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 97 flow [2023-01-28 10:51:21,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-01-28 10:51:21,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2023-01-28 10:51:21,895 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 97 flow [2023-01-28 10:51:21,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 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 10:51:21,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:51:21,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:51:21,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 10:51:21,897 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:51:21,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:51:21,897 INFO L85 PathProgramCache]: Analyzing trace with hash -166356890, now seen corresponding path program 1 times [2023-01-28 10:51:21,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:51:21,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661760450] [2023-01-28 10:51:21,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:51:21,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:51:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:51:22,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:51:22,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:51:22,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661760450] [2023-01-28 10:51:22,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661760450] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:51:22,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:51:22,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 10:51:22,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961681385] [2023-01-28 10:51:22,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:51:22,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 10:51:22,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:51:22,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 10:51:22,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 10:51:22,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 420 [2023-01-28 10:51:22,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 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 10:51:22,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:51:22,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 420 [2023-01-28 10:51:22,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:51:22,317 INFO L130 PetriNetUnfolder]: 2187/2885 cut-off events. [2023-01-28 10:51:22,317 INFO L131 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2023-01-28 10:51:22,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6425 conditions, 2885 events. 2187/2885 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 11793 event pairs, 596 based on Foata normal form. 76/2337 useless extension candidates. Maximal degree in co-relation 2214. Up to 1820 conditions per place. [2023-01-28 10:51:22,331 INFO L137 encePairwiseOnDemand]: 417/420 looper letters, 53 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-01-28 10:51:22,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 59 transitions, 264 flow [2023-01-28 10:51:22,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 10:51:22,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 10:51:22,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2023-01-28 10:51:22,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2023-01-28 10:51:22,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2023-01-28 10:51:22,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2023-01-28 10:51:22,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:51:22,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2023-01-28 10:51:22,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 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 10:51:22,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 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 10:51:22,339 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 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 10:51:22,339 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 97 flow. Second operand 3 states and 620 transitions. [2023-01-28 10:51:22,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 59 transitions, 264 flow [2023-01-28 10:51:22,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 59 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 10:51:22,341 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 108 flow [2023-01-28 10:51:22,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-01-28 10:51:22,341 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-01-28 10:51:22,342 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 108 flow [2023-01-28 10:51:22,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 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 10:51:22,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:51:22,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:51:22,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 10:51:22,343 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:51:22,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:51:22,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1584924050, now seen corresponding path program 1 times [2023-01-28 10:51:22,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:51:22,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796418778] [2023-01-28 10:51:22,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:51:22,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:51:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:51:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:51:22,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:51:22,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796418778] [2023-01-28 10:51:22,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796418778] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:51:22,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:51:22,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 10:51:22,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384097595] [2023-01-28 10:51:22,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:51:22,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 10:51:22,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:51:22,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 10:51:22,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 10:51:22,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 420 [2023-01-28 10:51:22,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 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 10:51:22,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:51:22,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 420 [2023-01-28 10:51:22,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:51:22,683 INFO L130 PetriNetUnfolder]: 2417/3353 cut-off events. [2023-01-28 10:51:22,683 INFO L131 PetriNetUnfolder]: For 1265/1265 co-relation queries the response was YES. [2023-01-28 10:51:22,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7906 conditions, 3353 events. 2417/3353 cut-off events. For 1265/1265 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15584 event pairs, 747 based on Foata normal form. 100/3107 useless extension candidates. Maximal degree in co-relation 3828. Up to 2227 conditions per place. [2023-01-28 10:51:22,697 INFO L137 encePairwiseOnDemand]: 417/420 looper letters, 57 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-01-28 10:51:22,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 63 transitions, 298 flow [2023-01-28 10:51:22,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 10:51:22,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 10:51:22,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2023-01-28 10:51:22,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4936507936507937 [2023-01-28 10:51:22,699 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2023-01-28 10:51:22,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2023-01-28 10:51:22,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:51:22,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2023-01-28 10:51:22,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 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 10:51:22,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 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 10:51:22,702 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 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 10:51:22,702 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 108 flow. Second operand 3 states and 622 transitions. [2023-01-28 10:51:22,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 63 transitions, 298 flow [2023-01-28 10:51:22,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 63 transitions, 295 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 10:51:22,704 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 120 flow [2023-01-28 10:51:22,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-01-28 10:51:22,704 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-01-28 10:51:22,705 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 120 flow [2023-01-28 10:51:22,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 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 10:51:22,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:51:22,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:51:22,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 10:51:22,705 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:51:22,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:51:22,706 INFO L85 PathProgramCache]: Analyzing trace with hash 830249853, now seen corresponding path program 1 times [2023-01-28 10:51:22,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:51:22,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965735231] [2023-01-28 10:51:22,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:51:22,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:51:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:51:22,810 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 10:51:22,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:51:22,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965735231] [2023-01-28 10:51:22,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965735231] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:51:22,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:51:22,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 10:51:22,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710091438] [2023-01-28 10:51:22,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:51:22,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 10:51:22,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:51:22,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 10:51:22,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 10:51:22,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 420 [2023-01-28 10:51:22,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 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 10:51:22,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:51:22,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 420 [2023-01-28 10:51:22,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:51:23,102 INFO L130 PetriNetUnfolder]: 2112/3127 cut-off events. [2023-01-28 10:51:23,102 INFO L131 PetriNetUnfolder]: For 1778/1778 co-relation queries the response was YES. [2023-01-28 10:51:23,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7659 conditions, 3127 events. 2112/3127 cut-off events. For 1778/1778 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 16392 event pairs, 1532 based on Foata normal form. 100/3148 useless extension candidates. Maximal degree in co-relation 3812. Up to 2237 conditions per place. [2023-01-28 10:51:23,115 INFO L137 encePairwiseOnDemand]: 416/420 looper letters, 56 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2023-01-28 10:51:23,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 65 transitions, 313 flow [2023-01-28 10:51:23,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 10:51:23,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 10:51:23,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 734 transitions. [2023-01-28 10:51:23,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4369047619047619 [2023-01-28 10:51:23,117 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 734 transitions. [2023-01-28 10:51:23,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 734 transitions. [2023-01-28 10:51:23,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:51:23,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 734 transitions. [2023-01-28 10:51:23,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 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 10:51:23,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 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 10:51:23,122 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 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 10:51:23,122 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 120 flow. Second operand 4 states and 734 transitions. [2023-01-28 10:51:23,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 65 transitions, 313 flow [2023-01-28 10:51:23,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 65 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 10:51:23,123 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 138 flow [2023-01-28 10:51:23,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-01-28 10:51:23,124 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-01-28 10:51:23,124 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 138 flow [2023-01-28 10:51:23,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 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 10:51:23,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:51:23,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:51:23,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 10:51:23,125 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:51:23,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:51:23,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1828692873, now seen corresponding path program 1 times [2023-01-28 10:51:23,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:51:23,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824355657] [2023-01-28 10:51:23,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:51:23,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:51:23,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:51:23,218 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 10:51:23,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:51:23,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824355657] [2023-01-28 10:51:23,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824355657] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:51:23,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:51:23,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 10:51:23,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384993556] [2023-01-28 10:51:23,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:51:23,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 10:51:23,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:51:23,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 10:51:23,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 10:51:23,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 420 [2023-01-28 10:51:23,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 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 10:51:23,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:51:23,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 420 [2023-01-28 10:51:23,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:51:23,571 INFO L130 PetriNetUnfolder]: 2699/4094 cut-off events. [2023-01-28 10:51:23,571 INFO L131 PetriNetUnfolder]: For 2330/2330 co-relation queries the response was YES. [2023-01-28 10:51:23,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9854 conditions, 4094 events. 2699/4094 cut-off events. For 2330/2330 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23414 event pairs, 2028 based on Foata normal form. 104/4122 useless extension candidates. Maximal degree in co-relation 5833. Up to 2990 conditions per place. [2023-01-28 10:51:23,590 INFO L137 encePairwiseOnDemand]: 415/420 looper letters, 60 selfloop transitions, 4 changer transitions 20/90 dead transitions. [2023-01-28 10:51:23,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 90 transitions, 450 flow [2023-01-28 10:51:23,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:51:23,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:51:23,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 928 transitions. [2023-01-28 10:51:23,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4419047619047619 [2023-01-28 10:51:23,593 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 928 transitions. [2023-01-28 10:51:23,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 928 transitions. [2023-01-28 10:51:23,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:51:23,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 928 transitions. [2023-01-28 10:51:23,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.6) internal successors, (928), 5 states have internal predecessors, (928), 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 10:51:23,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 420.0) internal successors, (2520), 6 states have internal predecessors, (2520), 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 10:51:23,598 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 420.0) internal successors, (2520), 6 states have internal predecessors, (2520), 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 10:51:23,598 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 138 flow. Second operand 5 states and 928 transitions. [2023-01-28 10:51:23,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 90 transitions, 450 flow [2023-01-28 10:51:23,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 90 transitions, 442 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-28 10:51:23,601 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 166 flow [2023-01-28 10:51:23,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2023-01-28 10:51:23,601 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2023-01-28 10:51:23,602 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 166 flow [2023-01-28 10:51:23,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 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 10:51:23,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:51:23,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:51:23,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 10:51:23,602 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:51:23,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:51:23,603 INFO L85 PathProgramCache]: Analyzing trace with hash -2023714045, now seen corresponding path program 1 times [2023-01-28 10:51:23,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:51:23,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575053089] [2023-01-28 10:51:23,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:51:23,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:51:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:51:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:51:23,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:51:23,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575053089] [2023-01-28 10:51:23,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575053089] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:51:23,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999486171] [2023-01-28 10:51:23,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:51:23,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:51:23,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:51:23,981 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:51:24,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 10:51:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:51:24,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 10:51:24,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:51:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:51:24,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:51:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:51:24,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999486171] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 10:51:24,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 10:51:24,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 14 [2023-01-28 10:51:24,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191939097] [2023-01-28 10:51:24,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:51:24,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 10:51:24,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:51:24,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 10:51:24,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-01-28 10:51:24,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 420 [2023-01-28 10:51:24,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 166 flow. Second operand has 7 states, 7 states have (on average 176.42857142857142) internal successors, (1235), 7 states have internal predecessors, (1235), 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 10:51:24,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:51:24,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 420 [2023-01-28 10:51:24,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:51:25,823 INFO L130 PetriNetUnfolder]: 11849/16855 cut-off events. [2023-01-28 10:51:25,824 INFO L131 PetriNetUnfolder]: For 7043/7043 co-relation queries the response was YES. [2023-01-28 10:51:25,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39886 conditions, 16855 events. 11849/16855 cut-off events. For 7043/7043 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 92074 event pairs, 1914 based on Foata normal form. 360/17213 useless extension candidates. Maximal degree in co-relation 30932. Up to 3696 conditions per place. [2023-01-28 10:51:25,897 INFO L137 encePairwiseOnDemand]: 411/420 looper letters, 200 selfloop transitions, 33 changer transitions 9/242 dead transitions. [2023-01-28 10:51:25,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 242 transitions, 1214 flow [2023-01-28 10:51:25,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 10:51:25,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 10:51:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2465 transitions. [2023-01-28 10:51:25,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45146520146520147 [2023-01-28 10:51:25,902 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2465 transitions. [2023-01-28 10:51:25,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2465 transitions. [2023-01-28 10:51:25,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:51:25,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2465 transitions. [2023-01-28 10:51:25,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 189.6153846153846) internal successors, (2465), 13 states have internal predecessors, (2465), 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 10:51:25,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 420.0) internal successors, (5880), 14 states have internal predecessors, (5880), 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 10:51:25,914 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 420.0) internal successors, (5880), 14 states have internal predecessors, (5880), 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 10:51:25,914 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 166 flow. Second operand 13 states and 2465 transitions. [2023-01-28 10:51:25,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 242 transitions, 1214 flow [2023-01-28 10:51:25,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 242 transitions, 1210 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 10:51:25,923 INFO L231 Difference]: Finished difference. Result has 73 places, 74 transitions, 445 flow [2023-01-28 10:51:25,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=445, PETRI_PLACES=73, PETRI_TRANSITIONS=74} [2023-01-28 10:51:25,925 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2023-01-28 10:51:25,925 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 74 transitions, 445 flow [2023-01-28 10:51:25,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 176.42857142857142) internal successors, (1235), 7 states have internal predecessors, (1235), 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 10:51:25,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:51:25,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:51:25,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 10:51:26,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-01-28 10:51:26,130 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:51:26,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:51:26,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1097017845, now seen corresponding path program 2 times [2023-01-28 10:51:26,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:51:26,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894782160] [2023-01-28 10:51:26,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:51:26,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:51:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:51:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:51:26,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:51:26,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894782160] [2023-01-28 10:51:26,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894782160] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:51:26,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:51:26,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:51:26,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743236730] [2023-01-28 10:51:26,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:51:26,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:51:26,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:51:26,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:51:26,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-01-28 10:51:26,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 420 [2023-01-28 10:51:26,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 74 transitions, 445 flow. Second operand has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 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 10:51:26,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:51:26,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 420 [2023-01-28 10:51:26,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:51:28,072 INFO L130 PetriNetUnfolder]: 12313/17699 cut-off events. [2023-01-28 10:51:28,072 INFO L131 PetriNetUnfolder]: For 31798/31798 co-relation queries the response was YES. [2023-01-28 10:51:28,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57552 conditions, 17699 events. 12313/17699 cut-off events. For 31798/31798 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 98739 event pairs, 3658 based on Foata normal form. 52/17749 useless extension candidates. Maximal degree in co-relation 48026. Up to 13071 conditions per place. [2023-01-28 10:51:28,143 INFO L137 encePairwiseOnDemand]: 414/420 looper letters, 102 selfloop transitions, 13 changer transitions 30/145 dead transitions. [2023-01-28 10:51:28,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 145 transitions, 1003 flow [2023-01-28 10:51:28,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 10:51:28,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 10:51:28,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1173 transitions. [2023-01-28 10:51:28,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4654761904761905 [2023-01-28 10:51:28,145 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1173 transitions. [2023-01-28 10:51:28,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1173 transitions. [2023-01-28 10:51:28,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:51:28,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1173 transitions. [2023-01-28 10:51:28,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 195.5) internal successors, (1173), 6 states have internal predecessors, (1173), 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 10:51:28,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 420.0) internal successors, (2940), 7 states have internal predecessors, (2940), 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 10:51:28,150 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 420.0) internal successors, (2940), 7 states have internal predecessors, (2940), 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 10:51:28,150 INFO L175 Difference]: Start difference. First operand has 73 places, 74 transitions, 445 flow. Second operand 6 states and 1173 transitions. [2023-01-28 10:51:28,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 145 transitions, 1003 flow [2023-01-28 10:51:28,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 145 transitions, 982 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-28 10:51:28,254 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 519 flow [2023-01-28 10:51:28,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=519, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2023-01-28 10:51:28,255 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2023-01-28 10:51:28,255 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 519 flow [2023-01-28 10:51:28,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 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 10:51:28,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:51:28,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:51:28,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 10:51:28,256 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:51:28,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:51:28,256 INFO L85 PathProgramCache]: Analyzing trace with hash -378640933, now seen corresponding path program 3 times [2023-01-28 10:51:28,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:51:28,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36223742] [2023-01-28 10:51:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:51:28,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:51:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:51:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:51:28,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:51:28,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36223742] [2023-01-28 10:51:28,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36223742] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:51:28,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:51:28,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:51:28,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613845629] [2023-01-28 10:51:28,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:51:28,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:51:28,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:51:28,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:51:28,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-01-28 10:51:28,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 420 [2023-01-28 10:51:28,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 519 flow. Second operand has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 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 10:51:28,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:51:28,558 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 420 [2023-01-28 10:51:28,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:51:30,680 INFO L130 PetriNetUnfolder]: 17203/24645 cut-off events. [2023-01-28 10:51:30,681 INFO L131 PetriNetUnfolder]: For 57201/57201 co-relation queries the response was YES. [2023-01-28 10:51:30,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84027 conditions, 24645 events. 17203/24645 cut-off events. For 57201/57201 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 142765 event pairs, 5212 based on Foata normal form. 208/24851 useless extension candidates. Maximal degree in co-relation 65471. Up to 13027 conditions per place. [2023-01-28 10:51:30,794 INFO L137 encePairwiseOnDemand]: 412/420 looper letters, 165 selfloop transitions, 30 changer transitions 11/206 dead transitions. [2023-01-28 10:51:30,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 206 transitions, 1605 flow [2023-01-28 10:51:30,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:51:30,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:51:30,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1561 transitions. [2023-01-28 10:51:30,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46458333333333335 [2023-01-28 10:51:30,797 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1561 transitions. [2023-01-28 10:51:30,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1561 transitions. [2023-01-28 10:51:30,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:51:30,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1561 transitions. [2023-01-28 10:51:30,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 195.125) internal successors, (1561), 8 states have internal predecessors, (1561), 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 10:51:30,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 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 10:51:30,803 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 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 10:51:30,803 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 519 flow. Second operand 8 states and 1561 transitions. [2023-01-28 10:51:30,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 206 transitions, 1605 flow [2023-01-28 10:51:30,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 206 transitions, 1513 flow, removed 24 selfloop flow, removed 2 redundant places. [2023-01-28 10:51:30,908 INFO L231 Difference]: Finished difference. Result has 87 places, 97 transitions, 745 flow [2023-01-28 10:51:30,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=745, PETRI_PLACES=87, PETRI_TRANSITIONS=97} [2023-01-28 10:51:30,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2023-01-28 10:51:30,911 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 97 transitions, 745 flow [2023-01-28 10:51:30,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 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 10:51:30,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:51:30,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:51:30,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 10:51:30,912 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:51:30,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:51:30,912 INFO L85 PathProgramCache]: Analyzing trace with hash 105860259, now seen corresponding path program 4 times [2023-01-28 10:51:30,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:51:30,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741022169] [2023-01-28 10:51:30,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:51:30,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:51:30,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:51:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:51:31,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:51:31,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741022169] [2023-01-28 10:51:31,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741022169] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:51:31,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:51:31,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:51:31,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109639935] [2023-01-28 10:51:31,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:51:31,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:51:31,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:51:31,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:51:31,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-28 10:51:31,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 420 [2023-01-28 10:51:31,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 97 transitions, 745 flow. Second operand has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 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 10:51:31,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:51:31,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 420 [2023-01-28 10:51:31,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:51:34,235 INFO L130 PetriNetUnfolder]: 22917/33653 cut-off events. [2023-01-28 10:51:34,235 INFO L131 PetriNetUnfolder]: For 89298/89298 co-relation queries the response was YES. [2023-01-28 10:51:34,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122905 conditions, 33653 events. 22917/33653 cut-off events. For 89298/89298 co-relation queries the response was YES. Maximal size of possible extension queue 1142. Compared 217178 event pairs, 6526 based on Foata normal form. 368/34019 useless extension candidates. Maximal degree in co-relation 102762. Up to 16763 conditions per place. [2023-01-28 10:51:34,425 INFO L137 encePairwiseOnDemand]: 414/420 looper letters, 208 selfloop transitions, 37 changer transitions 11/256 dead transitions. [2023-01-28 10:51:34,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 256 transitions, 2098 flow [2023-01-28 10:51:34,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:51:34,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:51:34,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1585 transitions. [2023-01-28 10:51:34,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47172619047619047 [2023-01-28 10:51:34,429 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1585 transitions. [2023-01-28 10:51:34,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1585 transitions. [2023-01-28 10:51:34,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:51:34,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1585 transitions. [2023-01-28 10:51:34,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.125) internal successors, (1585), 8 states have internal predecessors, (1585), 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 10:51:34,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 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 10:51:34,436 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 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 10:51:34,436 INFO L175 Difference]: Start difference. First operand has 87 places, 97 transitions, 745 flow. Second operand 8 states and 1585 transitions. [2023-01-28 10:51:34,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 256 transitions, 2098 flow [2023-01-28 10:51:34,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 256 transitions, 2029 flow, removed 31 selfloop flow, removed 1 redundant places. [2023-01-28 10:51:34,851 INFO L231 Difference]: Finished difference. Result has 98 places, 115 transitions, 1055 flow [2023-01-28 10:51:34,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1055, PETRI_PLACES=98, PETRI_TRANSITIONS=115} [2023-01-28 10:51:34,851 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2023-01-28 10:51:34,851 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 115 transitions, 1055 flow [2023-01-28 10:51:34,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 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 10:51:34,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:51:34,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:51:34,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 10:51:34,852 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:51:34,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:51:34,855 INFO L85 PathProgramCache]: Analyzing trace with hash 2028839541, now seen corresponding path program 5 times [2023-01-28 10:51:34,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:51:34,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591690772] [2023-01-28 10:51:34,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:51:34,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:51:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:51:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:51:35,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:51:35,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591690772] [2023-01-28 10:51:35,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591690772] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:51:35,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:51:35,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:51:35,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589095130] [2023-01-28 10:51:35,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:51:35,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:51:35,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:51:35,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:51:35,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-01-28 10:51:35,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 420 [2023-01-28 10:51:35,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 115 transitions, 1055 flow. Second operand has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 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 10:51:35,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:51:35,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 420 [2023-01-28 10:51:35,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:51:38,084 INFO L130 PetriNetUnfolder]: 20461/29645 cut-off events. [2023-01-28 10:51:38,084 INFO L131 PetriNetUnfolder]: For 109577/109577 co-relation queries the response was YES. [2023-01-28 10:51:38,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116455 conditions, 29645 events. 20461/29645 cut-off events. For 109577/109577 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 181315 event pairs, 7882 based on Foata normal form. 148/29791 useless extension candidates. Maximal degree in co-relation 100526. Up to 23679 conditions per place. [2023-01-28 10:51:38,204 INFO L137 encePairwiseOnDemand]: 413/420 looper letters, 136 selfloop transitions, 32 changer transitions 28/196 dead transitions. [2023-01-28 10:51:38,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 196 transitions, 1687 flow [2023-01-28 10:51:38,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:51:38,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:51:38,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1558 transitions. [2023-01-28 10:51:38,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636904761904762 [2023-01-28 10:51:38,207 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1558 transitions. [2023-01-28 10:51:38,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1558 transitions. [2023-01-28 10:51:38,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:51:38,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1558 transitions. [2023-01-28 10:51:38,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 194.75) internal successors, (1558), 8 states have internal predecessors, (1558), 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 10:51:38,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 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 10:51:38,214 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 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 10:51:38,214 INFO L175 Difference]: Start difference. First operand has 98 places, 115 transitions, 1055 flow. Second operand 8 states and 1558 transitions. [2023-01-28 10:51:38,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 196 transitions, 1687 flow [2023-01-28 10:51:38,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 196 transitions, 1653 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-01-28 10:51:38,869 INFO L231 Difference]: Finished difference. Result has 106 places, 110 transitions, 1033 flow [2023-01-28 10:51:38,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1033, PETRI_PLACES=106, PETRI_TRANSITIONS=110} [2023-01-28 10:51:38,869 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2023-01-28 10:51:38,869 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 110 transitions, 1033 flow [2023-01-28 10:51:38,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 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 10:51:38,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:51:38,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:51:38,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 10:51:38,870 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:51:38,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:51:38,871 INFO L85 PathProgramCache]: Analyzing trace with hash -763011869, now seen corresponding path program 6 times [2023-01-28 10:51:38,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:51:38,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802858695] [2023-01-28 10:51:38,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:51:38,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:51:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:51:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:51:39,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:51:39,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802858695] [2023-01-28 10:51:39,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802858695] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:51:39,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672765344] [2023-01-28 10:51:39,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:51:39,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:51:39,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:51:39,149 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:51:39,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 10:51:39,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 10:51:39,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:51:39,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 10:51:39,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:51:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:51:39,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 10:51:39,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672765344] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:51:39,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 10:51:39,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2023-01-28 10:51:39,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040957639] [2023-01-28 10:51:39,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:51:39,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:51:39,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:51:39,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:51:39,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-01-28 10:51:39,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 420 [2023-01-28 10:51:39,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 110 transitions, 1033 flow. Second operand has 6 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 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 10:51:39,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:51:39,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 420 [2023-01-28 10:51:39,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:51:43,294 INFO L130 PetriNetUnfolder]: 28379/41777 cut-off events. [2023-01-28 10:51:43,294 INFO L131 PetriNetUnfolder]: For 145249/145249 co-relation queries the response was YES. [2023-01-28 10:51:43,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162728 conditions, 41777 events. 28379/41777 cut-off events. For 145249/145249 co-relation queries the response was YES. Maximal size of possible extension queue 1499. Compared 278659 event pairs, 10660 based on Foata normal form. 176/41951 useless extension candidates. Maximal degree in co-relation 140570. Up to 25651 conditions per place. [2023-01-28 10:51:43,582 INFO L137 encePairwiseOnDemand]: 411/420 looper letters, 228 selfloop transitions, 99 changer transitions 19/346 dead transitions. [2023-01-28 10:51:43,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 346 transitions, 3641 flow [2023-01-28 10:51:43,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 10:51:43,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 10:51:43,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2275 transitions. [2023-01-28 10:51:43,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513888888888889 [2023-01-28 10:51:43,589 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2275 transitions. [2023-01-28 10:51:43,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2275 transitions. [2023-01-28 10:51:43,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:51:43,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2275 transitions. [2023-01-28 10:51:43,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 189.58333333333334) internal successors, (2275), 12 states have internal predecessors, (2275), 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 10:51:43,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 420.0) internal successors, (5460), 13 states have internal predecessors, (5460), 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 10:51:43,597 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 420.0) internal successors, (5460), 13 states have internal predecessors, (5460), 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 10:51:43,597 INFO L175 Difference]: Start difference. First operand has 106 places, 110 transitions, 1033 flow. Second operand 12 states and 2275 transitions. [2023-01-28 10:51:43,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 346 transitions, 3641 flow [2023-01-28 10:51:44,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 346 transitions, 3472 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-01-28 10:51:44,605 INFO L231 Difference]: Finished difference. Result has 114 places, 182 transitions, 2131 flow [2023-01-28 10:51:44,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2131, PETRI_PLACES=114, PETRI_TRANSITIONS=182} [2023-01-28 10:51:44,606 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2023-01-28 10:51:44,606 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 182 transitions, 2131 flow [2023-01-28 10:51:44,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 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 10:51:44,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:51:44,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:51:44,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 10:51:44,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-28 10:51:44,811 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:51:44,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:51:44,811 INFO L85 PathProgramCache]: Analyzing trace with hash -269105815, now seen corresponding path program 7 times [2023-01-28 10:51:44,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:51:44,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856882902] [2023-01-28 10:51:44,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:51:44,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:51:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:51:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:51:45,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:51:45,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856882902] [2023-01-28 10:51:45,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856882902] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:51:45,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083986290] [2023-01-28 10:51:45,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:51:45,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:51:45,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:51:45,039 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:51:45,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 10:51:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:51:45,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 10:51:45,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:51:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:51:45,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:51:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:51:45,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083986290] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 10:51:45,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 10:51:45,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 12 [2023-01-28 10:51:45,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258386726] [2023-01-28 10:51:45,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:51:45,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:51:45,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:51:45,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:51:45,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-01-28 10:51:45,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 420 [2023-01-28 10:51:45,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 182 transitions, 2131 flow. Second operand has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 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 10:51:45,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:51:45,391 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 420 [2023-01-28 10:51:45,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:51:49,924 INFO L130 PetriNetUnfolder]: 30215/44493 cut-off events. [2023-01-28 10:51:49,924 INFO L131 PetriNetUnfolder]: For 199034/199034 co-relation queries the response was YES. [2023-01-28 10:51:50,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188172 conditions, 44493 events. 30215/44493 cut-off events. For 199034/199034 co-relation queries the response was YES. Maximal size of possible extension queue 1687. Compared 302567 event pairs, 6554 based on Foata normal form. 2056/46547 useless extension candidates. Maximal degree in co-relation 170418. Up to 14235 conditions per place. [2023-01-28 10:51:50,233 INFO L137 encePairwiseOnDemand]: 412/420 looper letters, 205 selfloop transitions, 114 changer transitions 0/319 dead transitions. [2023-01-28 10:51:50,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 319 transitions, 3626 flow [2023-01-28 10:51:50,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:51:50,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:51:50,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1378 transitions. [2023-01-28 10:51:50,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46870748299319726 [2023-01-28 10:51:50,236 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1378 transitions. [2023-01-28 10:51:50,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1378 transitions. [2023-01-28 10:51:50,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:51:50,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1378 transitions. [2023-01-28 10:51:50,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 196.85714285714286) internal successors, (1378), 7 states have internal predecessors, (1378), 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 10:51:50,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 420.0) internal successors, (3360), 8 states have internal predecessors, (3360), 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 10:51:50,241 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 420.0) internal successors, (3360), 8 states have internal predecessors, (3360), 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 10:51:50,241 INFO L175 Difference]: Start difference. First operand has 114 places, 182 transitions, 2131 flow. Second operand 7 states and 1378 transitions. [2023-01-28 10:51:50,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 319 transitions, 3626 flow [2023-01-28 10:51:51,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 319 transitions, 3610 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-01-28 10:51:51,772 INFO L231 Difference]: Finished difference. Result has 121 places, 212 transitions, 2808 flow [2023-01-28 10:51:51,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2808, PETRI_PLACES=121, PETRI_TRANSITIONS=212} [2023-01-28 10:51:51,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2023-01-28 10:51:51,773 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 212 transitions, 2808 flow [2023-01-28 10:51:51,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 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 10:51:51,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:51:51,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:51:51,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-28 10:51:51,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:51:51,989 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:51:51,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:51:51,990 INFO L85 PathProgramCache]: Analyzing trace with hash -643399995, now seen corresponding path program 8 times [2023-01-28 10:51:51,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:51:51,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620428269] [2023-01-28 10:51:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:51:51,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:51:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:51:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:51:52,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:51:52,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620428269] [2023-01-28 10:51:52,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620428269] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:51:52,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:51:52,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:51:52,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863712953] [2023-01-28 10:51:52,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:51:52,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:51:52,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:51:52,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:51:52,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-01-28 10:51:52,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 420 [2023-01-28 10:51:52,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 212 transitions, 2808 flow. Second operand has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 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 10:51:52,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:51:52,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 420 [2023-01-28 10:51:52,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:51:56,381 INFO L130 PetriNetUnfolder]: 27307/39969 cut-off events. [2023-01-28 10:51:56,381 INFO L131 PetriNetUnfolder]: For 219713/219713 co-relation queries the response was YES. [2023-01-28 10:51:56,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182852 conditions, 39969 events. 27307/39969 cut-off events. For 219713/219713 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 262416 event pairs, 11204 based on Foata normal form. 1096/41063 useless extension candidates. Maximal degree in co-relation 165853. Up to 33509 conditions per place. [2023-01-28 10:51:56,730 INFO L137 encePairwiseOnDemand]: 414/420 looper letters, 177 selfloop transitions, 88 changer transitions 6/271 dead transitions. [2023-01-28 10:51:56,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 271 transitions, 3657 flow [2023-01-28 10:51:56,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 10:51:56,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 10:51:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1163 transitions. [2023-01-28 10:51:56,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46150793650793653 [2023-01-28 10:51:56,732 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1163 transitions. [2023-01-28 10:51:56,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1163 transitions. [2023-01-28 10:51:56,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:51:56,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1163 transitions. [2023-01-28 10:51:56,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 193.83333333333334) internal successors, (1163), 6 states have internal predecessors, (1163), 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 10:51:56,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 420.0) internal successors, (2940), 7 states have internal predecessors, (2940), 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 10:51:56,737 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 420.0) internal successors, (2940), 7 states have internal predecessors, (2940), 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 10:51:56,737 INFO L175 Difference]: Start difference. First operand has 121 places, 212 transitions, 2808 flow. Second operand 6 states and 1163 transitions. [2023-01-28 10:51:56,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 271 transitions, 3657 flow [2023-01-28 10:51:58,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 271 transitions, 3433 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-01-28 10:51:58,789 INFO L231 Difference]: Finished difference. Result has 119 places, 208 transitions, 2735 flow [2023-01-28 10:51:58,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=2565, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2735, PETRI_PLACES=119, PETRI_TRANSITIONS=208} [2023-01-28 10:51:58,790 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2023-01-28 10:51:58,790 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 208 transitions, 2735 flow [2023-01-28 10:51:58,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 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 10:51:58,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:51:58,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:51:58,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-28 10:51:58,790 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:51:58,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:51:58,791 INFO L85 PathProgramCache]: Analyzing trace with hash 121245286, now seen corresponding path program 1 times [2023-01-28 10:51:58,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:51:58,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806882162] [2023-01-28 10:51:58,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:51:58,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:51:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:51:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:51:59,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:51:59,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806882162] [2023-01-28 10:51:59,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806882162] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:51:59,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:51:59,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:51:59,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570998816] [2023-01-28 10:51:59,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:51:59,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:51:59,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:51:59,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:51:59,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-28 10:51:59,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 420 [2023-01-28 10:51:59,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 208 transitions, 2735 flow. Second operand has 6 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 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 10:51:59,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:51:59,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 420 [2023-01-28 10:51:59,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:52:02,756 INFO L130 PetriNetUnfolder]: 25995/37549 cut-off events. [2023-01-28 10:52:02,756 INFO L131 PetriNetUnfolder]: For 150771/150771 co-relation queries the response was YES. [2023-01-28 10:52:02,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157381 conditions, 37549 events. 25995/37549 cut-off events. For 150771/150771 co-relation queries the response was YES. Maximal size of possible extension queue 1425. Compared 240288 event pairs, 7975 based on Foata normal form. 770/38317 useless extension candidates. Maximal degree in co-relation 150660. Up to 16603 conditions per place. [2023-01-28 10:52:03,021 INFO L137 encePairwiseOnDemand]: 413/420 looper letters, 292 selfloop transitions, 44 changer transitions 29/365 dead transitions. [2023-01-28 10:52:03,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 365 transitions, 4269 flow [2023-01-28 10:52:03,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:52:03,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:52:03,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1541 transitions. [2023-01-28 10:52:03,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45863095238095236 [2023-01-28 10:52:03,024 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1541 transitions. [2023-01-28 10:52:03,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1541 transitions. [2023-01-28 10:52:03,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:52:03,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1541 transitions. [2023-01-28 10:52:03,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 192.625) internal successors, (1541), 8 states have internal predecessors, (1541), 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 10:52:03,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 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 10:52:03,030 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 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 10:52:03,030 INFO L175 Difference]: Start difference. First operand has 119 places, 208 transitions, 2735 flow. Second operand 8 states and 1541 transitions. [2023-01-28 10:52:03,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 365 transitions, 4269 flow [2023-01-28 10:52:04,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 365 transitions, 3923 flow, removed 91 selfloop flow, removed 5 redundant places. [2023-01-28 10:52:04,426 INFO L231 Difference]: Finished difference. Result has 125 places, 200 transitions, 2307 flow [2023-01-28 10:52:04,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=2154, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2307, PETRI_PLACES=125, PETRI_TRANSITIONS=200} [2023-01-28 10:52:04,427 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2023-01-28 10:52:04,427 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 200 transitions, 2307 flow [2023-01-28 10:52:04,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 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 10:52:04,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:52:04,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:52:04,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-28 10:52:04,427 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:52:04,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:52:04,428 INFO L85 PathProgramCache]: Analyzing trace with hash 2003128858, now seen corresponding path program 2 times [2023-01-28 10:52:04,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:52:04,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160484085] [2023-01-28 10:52:04,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:52:04,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:52:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:52:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:52:04,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:52:04,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160484085] [2023-01-28 10:52:04,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160484085] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:52:04,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048407999] [2023-01-28 10:52:04,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:52:04,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:52:04,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:52:04,673 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:52:04,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 10:52:04,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:52:04,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:52:04,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 10:52:04,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:52:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:52:04,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:52:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:52:05,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048407999] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 10:52:05,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 10:52:05,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2023-01-28 10:52:05,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422137596] [2023-01-28 10:52:05,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:52:05,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:52:05,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:52:05,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:52:05,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-01-28 10:52:05,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 420 [2023-01-28 10:52:05,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 200 transitions, 2307 flow. Second operand has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 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 10:52:05,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:52:05,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 420 [2023-01-28 10:52:05,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:52:10,066 INFO L130 PetriNetUnfolder]: 34401/50117 cut-off events. [2023-01-28 10:52:10,066 INFO L131 PetriNetUnfolder]: For 219223/219223 co-relation queries the response was YES. [2023-01-28 10:52:10,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219129 conditions, 50117 events. 34401/50117 cut-off events. For 219223/219223 co-relation queries the response was YES. Maximal size of possible extension queue 1863. Compared 342644 event pairs, 7853 based on Foata normal form. 488/50603 useless extension candidates. Maximal degree in co-relation 214606. Up to 17700 conditions per place. [2023-01-28 10:52:10,476 INFO L137 encePairwiseOnDemand]: 413/420 looper letters, 283 selfloop transitions, 81 changer transitions 3/367 dead transitions. [2023-01-28 10:52:10,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 367 transitions, 4066 flow [2023-01-28 10:52:10,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:52:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:52:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1582 transitions. [2023-01-28 10:52:10,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2023-01-28 10:52:10,479 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1582 transitions. [2023-01-28 10:52:10,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1582 transitions. [2023-01-28 10:52:10,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:52:10,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1582 transitions. [2023-01-28 10:52:10,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 197.75) internal successors, (1582), 8 states have internal predecessors, (1582), 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 10:52:10,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 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 10:52:10,484 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 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 10:52:10,484 INFO L175 Difference]: Start difference. First operand has 125 places, 200 transitions, 2307 flow. Second operand 8 states and 1582 transitions. [2023-01-28 10:52:10,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 367 transitions, 4066 flow [2023-01-28 10:52:12,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 367 transitions, 3983 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 10:52:12,073 INFO L231 Difference]: Finished difference. Result has 133 places, 221 transitions, 2771 flow [2023-01-28 10:52:12,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=2237, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2771, PETRI_PLACES=133, PETRI_TRANSITIONS=221} [2023-01-28 10:52:12,074 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2023-01-28 10:52:12,074 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 221 transitions, 2771 flow [2023-01-28 10:52:12,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 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 10:52:12,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:52:12,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:52:12,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-01-28 10:52:12,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 10:52:12,279 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:52:12,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:52:12,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1008138826, now seen corresponding path program 3 times [2023-01-28 10:52:12,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:52:12,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526350613] [2023-01-28 10:52:12,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:52:12,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:52:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:52:12,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:52:12,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:52:12,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526350613] [2023-01-28 10:52:12,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526350613] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:52:12,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:52:12,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:52:12,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424155732] [2023-01-28 10:52:12,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:52:12,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:52:12,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:52:12,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:52:12,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-28 10:52:12,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 420 [2023-01-28 10:52:12,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 221 transitions, 2771 flow. Second operand has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 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 10:52:12,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:52:12,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 420 [2023-01-28 10:52:12,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:52:18,330 INFO L130 PetriNetUnfolder]: 34933/50957 cut-off events. [2023-01-28 10:52:18,330 INFO L131 PetriNetUnfolder]: For 312871/312871 co-relation queries the response was YES. [2023-01-28 10:52:18,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239304 conditions, 50957 events. 34933/50957 cut-off events. For 312871/312871 co-relation queries the response was YES. Maximal size of possible extension queue 1927. Compared 344134 event pairs, 13516 based on Foata normal form. 580/51535 useless extension candidates. Maximal degree in co-relation 234591. Up to 39127 conditions per place. [2023-01-28 10:52:18,718 INFO L137 encePairwiseOnDemand]: 413/420 looper letters, 248 selfloop transitions, 71 changer transitions 19/338 dead transitions. [2023-01-28 10:52:18,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 338 transitions, 4240 flow [2023-01-28 10:52:18,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:52:18,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:52:18,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1552 transitions. [2023-01-28 10:52:18,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2023-01-28 10:52:18,722 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1552 transitions. [2023-01-28 10:52:18,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1552 transitions. [2023-01-28 10:52:18,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:52:18,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1552 transitions. [2023-01-28 10:52:18,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 194.0) internal successors, (1552), 8 states have internal predecessors, (1552), 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 10:52:18,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 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 10:52:18,728 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 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 10:52:18,728 INFO L175 Difference]: Start difference. First operand has 133 places, 221 transitions, 2771 flow. Second operand 8 states and 1552 transitions. [2023-01-28 10:52:18,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 338 transitions, 4240 flow [2023-01-28 10:52:21,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 338 transitions, 4174 flow, removed 33 selfloop flow, removed 0 redundant places. [2023-01-28 10:52:21,060 INFO L231 Difference]: Finished difference. Result has 141 places, 228 transitions, 2978 flow [2023-01-28 10:52:21,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=2617, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2978, PETRI_PLACES=141, PETRI_TRANSITIONS=228} [2023-01-28 10:52:21,061 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2023-01-28 10:52:21,061 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 228 transitions, 2978 flow [2023-01-28 10:52:21,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 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 10:52:21,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:52:21,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:52:21,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-01-28 10:52:21,062 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:52:21,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:52:21,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1255457046, now seen corresponding path program 4 times [2023-01-28 10:52:21,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:52:21,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803020741] [2023-01-28 10:52:21,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:52:21,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:52:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:52:21,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:52:21,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:52:21,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803020741] [2023-01-28 10:52:21,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803020741] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:52:21,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733291614] [2023-01-28 10:52:21,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:52:21,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:52:21,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:52:21,397 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:52:21,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 10:52:21,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:52:21,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:52:21,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-28 10:52:21,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:52:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:52:21,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:52:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:52:21,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733291614] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:52:21,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:52:21,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 16 [2023-01-28 10:52:21,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616069950] [2023-01-28 10:52:21,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:52:21,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 10:52:21,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:52:21,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 10:52:21,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-01-28 10:52:21,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 420 [2023-01-28 10:52:21,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 228 transitions, 2978 flow. Second operand has 17 states, 17 states have (on average 171.94117647058823) internal successors, (2923), 17 states have internal predecessors, (2923), 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 10:52:21,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:52:21,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 420 [2023-01-28 10:52:21,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:52:30,219 INFO L130 PetriNetUnfolder]: 42691/63978 cut-off events. [2023-01-28 10:52:30,219 INFO L131 PetriNetUnfolder]: For 379837/379837 co-relation queries the response was YES. [2023-01-28 10:52:30,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298546 conditions, 63978 events. 42691/63978 cut-off events. For 379837/379837 co-relation queries the response was YES. Maximal size of possible extension queue 2551. Compared 480074 event pairs, 4324 based on Foata normal form. 1990/65966 useless extension candidates. Maximal degree in co-relation 293268. Up to 14382 conditions per place. [2023-01-28 10:52:30,772 INFO L137 encePairwiseOnDemand]: 407/420 looper letters, 548 selfloop transitions, 334 changer transitions 31/913 dead transitions. [2023-01-28 10:52:30,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 913 transitions, 11117 flow [2023-01-28 10:52:30,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 10:52:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 10:52:30,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 5267 transitions. [2023-01-28 10:52:30,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43243021346469623 [2023-01-28 10:52:30,779 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 5267 transitions. [2023-01-28 10:52:30,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 5267 transitions. [2023-01-28 10:52:30,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:52:30,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 5267 transitions. [2023-01-28 10:52:30,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 181.6206896551724) internal successors, (5267), 29 states have internal predecessors, (5267), 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 10:52:30,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 420.0) internal successors, (12600), 30 states have internal predecessors, (12600), 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 10:52:30,795 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 420.0) internal successors, (12600), 30 states have internal predecessors, (12600), 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 10:52:30,795 INFO L175 Difference]: Start difference. First operand has 141 places, 228 transitions, 2978 flow. Second operand 29 states and 5267 transitions. [2023-01-28 10:52:30,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 913 transitions, 11117 flow [2023-01-28 10:52:33,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 913 transitions, 10870 flow, removed 42 selfloop flow, removed 4 redundant places. [2023-01-28 10:52:33,948 INFO L231 Difference]: Finished difference. Result has 182 places, 471 transitions, 7007 flow [2023-01-28 10:52:33,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=2861, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=7007, PETRI_PLACES=182, PETRI_TRANSITIONS=471} [2023-01-28 10:52:33,949 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2023-01-28 10:52:33,949 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 471 transitions, 7007 flow [2023-01-28 10:52:33,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 171.94117647058823) internal successors, (2923), 17 states have internal predecessors, (2923), 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 10:52:33,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:52:33,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:52:33,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-01-28 10:52:34,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 10:52:34,150 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:52:34,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:52:34,150 INFO L85 PathProgramCache]: Analyzing trace with hash 417644422, now seen corresponding path program 5 times [2023-01-28 10:52:34,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:52:34,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106683407] [2023-01-28 10:52:34,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:52:34,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:52:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:52:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:52:34,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:52:34,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106683407] [2023-01-28 10:52:34,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106683407] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:52:34,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530975668] [2023-01-28 10:52:34,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:52:34,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:52:34,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:52:34,408 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:52:34,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 10:52:34,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:52:34,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:52:34,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 10:52:34,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:52:34,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:52:34,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:52:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:52:34,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530975668] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 10:52:34,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 10:52:34,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 6] total 16 [2023-01-28 10:52:34,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196097113] [2023-01-28 10:52:34,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:52:34,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 10:52:34,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:52:34,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 10:52:34,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-01-28 10:52:34,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 420 [2023-01-28 10:52:34,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 471 transitions, 7007 flow. Second operand has 8 states, 8 states have (on average 179.875) internal successors, (1439), 8 states have internal predecessors, (1439), 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 10:52:34,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:52:34,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 420 [2023-01-28 10:52:34,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:52:47,895 INFO L130 PetriNetUnfolder]: 55583/83322 cut-off events. [2023-01-28 10:52:47,895 INFO L131 PetriNetUnfolder]: For 801227/801227 co-relation queries the response was YES. [2023-01-28 10:52:48,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468428 conditions, 83322 events. 55583/83322 cut-off events. For 801227/801227 co-relation queries the response was YES. Maximal size of possible extension queue 3392. Compared 643358 event pairs, 10228 based on Foata normal form. 288/83608 useless extension candidates. Maximal degree in co-relation 461270. Up to 24841 conditions per place. [2023-01-28 10:52:48,895 INFO L137 encePairwiseOnDemand]: 408/420 looper letters, 496 selfloop transitions, 328 changer transitions 14/838 dead transitions. [2023-01-28 10:52:48,895 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 838 transitions, 13046 flow [2023-01-28 10:52:48,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 10:52:48,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 10:52:48,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1948 transitions. [2023-01-28 10:52:48,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638095238095238 [2023-01-28 10:52:48,897 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1948 transitions. [2023-01-28 10:52:48,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1948 transitions. [2023-01-28 10:52:48,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:52:48,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1948 transitions. [2023-01-28 10:52:48,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 194.8) internal successors, (1948), 10 states have internal predecessors, (1948), 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 10:52:48,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 420.0) internal successors, (4620), 11 states have internal predecessors, (4620), 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 10:52:48,901 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 420.0) internal successors, (4620), 11 states have internal predecessors, (4620), 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 10:52:48,902 INFO L175 Difference]: Start difference. First operand has 182 places, 471 transitions, 7007 flow. Second operand 10 states and 1948 transitions. [2023-01-28 10:52:48,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 838 transitions, 13046 flow [2023-01-28 10:53:08,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 838 transitions, 12366 flow, removed 283 selfloop flow, removed 3 redundant places. [2023-01-28 10:53:08,630 INFO L231 Difference]: Finished difference. Result has 194 places, 606 transitions, 9816 flow [2023-01-28 10:53:08,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=6631, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9816, PETRI_PLACES=194, PETRI_TRANSITIONS=606} [2023-01-28 10:53:08,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2023-01-28 10:53:08,631 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 606 transitions, 9816 flow [2023-01-28 10:53:08,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 179.875) internal successors, (1439), 8 states have internal predecessors, (1439), 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 10:53:08,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:53:08,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:53:08,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 10:53:08,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 10:53:08,832 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:53:08,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:53:08,833 INFO L85 PathProgramCache]: Analyzing trace with hash 134795650, now seen corresponding path program 6 times [2023-01-28 10:53:08,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:53:08,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375400935] [2023-01-28 10:53:08,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:53:08,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:53:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:53:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:53:09,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:53:09,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375400935] [2023-01-28 10:53:09,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375400935] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:53:09,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964629757] [2023-01-28 10:53:09,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:53:09,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:53:09,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:53:09,076 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:53:09,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 10:53:09,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 10:53:09,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:53:09,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 10:53:09,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:53:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:53:09,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:53:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:53:09,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964629757] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 10:53:09,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 10:53:09,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 5] total 15 [2023-01-28 10:53:09,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124216716] [2023-01-28 10:53:09,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:53:09,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 10:53:09,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:53:09,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 10:53:09,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-01-28 10:53:09,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 420 [2023-01-28 10:53:09,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 606 transitions, 9816 flow. Second operand has 8 states, 8 states have (on average 179.875) internal successors, (1439), 8 states have internal predecessors, (1439), 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 10:53:09,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:53:09,517 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 420 [2023-01-28 10:53:09,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:53:18,904 INFO L130 PetriNetUnfolder]: 41247/60598 cut-off events. [2023-01-28 10:53:18,904 INFO L131 PetriNetUnfolder]: For 693625/693625 co-relation queries the response was YES. [2023-01-28 10:53:19,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362765 conditions, 60598 events. 41247/60598 cut-off events. For 693625/693625 co-relation queries the response was YES. Maximal size of possible extension queue 2465. Compared 430731 event pairs, 7858 based on Foata normal form. 1388/61984 useless extension candidates. Maximal degree in co-relation 355822. Up to 24977 conditions per place. [2023-01-28 10:53:20,029 INFO L137 encePairwiseOnDemand]: 411/420 looper letters, 461 selfloop transitions, 330 changer transitions 0/791 dead transitions. [2023-01-28 10:53:20,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 791 transitions, 13306 flow [2023-01-28 10:53:20,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:53:20,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:53:20,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1737 transitions. [2023-01-28 10:53:20,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2023-01-28 10:53:20,031 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1737 transitions. [2023-01-28 10:53:20,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1737 transitions. [2023-01-28 10:53:20,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:53:20,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1737 transitions. [2023-01-28 10:53:20,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 193.0) internal successors, (1737), 9 states have internal predecessors, (1737), 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 10:53:20,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 420.0) internal successors, (4200), 10 states have internal predecessors, (4200), 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 10:53:20,035 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 420.0) internal successors, (4200), 10 states have internal predecessors, (4200), 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 10:53:20,035 INFO L175 Difference]: Start difference. First operand has 194 places, 606 transitions, 9816 flow. Second operand 9 states and 1737 transitions. [2023-01-28 10:53:20,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 791 transitions, 13306 flow [2023-01-28 10:53:36,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 791 transitions, 12897 flow, removed 190 selfloop flow, removed 2 redundant places. [2023-01-28 10:53:36,343 INFO L231 Difference]: Finished difference. Result has 201 places, 617 transitions, 10488 flow [2023-01-28 10:53:36,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=9285, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10488, PETRI_PLACES=201, PETRI_TRANSITIONS=617} [2023-01-28 10:53:36,344 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2023-01-28 10:53:36,344 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 617 transitions, 10488 flow [2023-01-28 10:53:36,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 179.875) internal successors, (1439), 8 states have internal predecessors, (1439), 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 10:53:36,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:53:36,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:53:36,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 10:53:36,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:53:36,545 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:53:36,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:53:36,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1448728976, now seen corresponding path program 7 times [2023-01-28 10:53:36,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:53:36,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932637254] [2023-01-28 10:53:36,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:53:36,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:53:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:53:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:53:36,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:53:36,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932637254] [2023-01-28 10:53:36,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932637254] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:53:36,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:53:36,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:53:36,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821907604] [2023-01-28 10:53:36,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:53:36,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:53:36,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:53:36,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:53:36,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-01-28 10:53:36,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 420 [2023-01-28 10:53:36,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 617 transitions, 10488 flow. Second operand has 6 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 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 10:53:36,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:53:36,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 420 [2023-01-28 10:53:36,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:53:46,970 INFO L130 PetriNetUnfolder]: 41672/60924 cut-off events. [2023-01-28 10:53:46,970 INFO L131 PetriNetUnfolder]: For 718443/718443 co-relation queries the response was YES. [2023-01-28 10:53:47,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365245 conditions, 60924 events. 41672/60924 cut-off events. For 718443/718443 co-relation queries the response was YES. Maximal size of possible extension queue 2362. Compared 424766 event pairs, 10407 based on Foata normal form. 1350/62272 useless extension candidates. Maximal degree in co-relation 360715. Up to 27439 conditions per place. [2023-01-28 10:53:47,732 INFO L137 encePairwiseOnDemand]: 411/420 looper letters, 569 selfloop transitions, 345 changer transitions 16/930 dead transitions. [2023-01-28 10:53:47,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 930 transitions, 14930 flow [2023-01-28 10:53:47,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 10:53:47,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 10:53:47,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1921 transitions. [2023-01-28 10:53:47,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573809523809524 [2023-01-28 10:53:47,734 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1921 transitions. [2023-01-28 10:53:47,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1921 transitions. [2023-01-28 10:53:47,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:53:47,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1921 transitions. [2023-01-28 10:53:47,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 192.1) internal successors, (1921), 10 states have internal predecessors, (1921), 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 10:53:47,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 420.0) internal successors, (4620), 11 states have internal predecessors, (4620), 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 10:53:47,738 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 420.0) internal successors, (4620), 11 states have internal predecessors, (4620), 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 10:53:47,738 INFO L175 Difference]: Start difference. First operand has 201 places, 617 transitions, 10488 flow. Second operand 10 states and 1921 transitions. [2023-01-28 10:53:47,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 930 transitions, 14930 flow [2023-01-28 10:53:58,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 930 transitions, 13916 flow, removed 61 selfloop flow, removed 18 redundant places. [2023-01-28 10:53:58,840 INFO L231 Difference]: Finished difference. Result has 195 places, 674 transitions, 11215 flow [2023-01-28 10:53:58,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=9036, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11215, PETRI_PLACES=195, PETRI_TRANSITIONS=674} [2023-01-28 10:53:58,841 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2023-01-28 10:53:58,841 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 674 transitions, 11215 flow [2023-01-28 10:53:58,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 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 10:53:58,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:53:58,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:53:58,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-01-28 10:53:58,842 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:53:58,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:53:58,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1389569998, now seen corresponding path program 8 times [2023-01-28 10:53:58,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:53:58,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032349343] [2023-01-28 10:53:58,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:53:58,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:53:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:53:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:53:59,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:53:59,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032349343] [2023-01-28 10:53:59,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032349343] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:53:59,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:53:59,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:53:59,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233109134] [2023-01-28 10:53:59,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:53:59,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:53:59,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:53:59,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:53:59,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-28 10:53:59,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 420 [2023-01-28 10:53:59,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 674 transitions, 11215 flow. Second operand has 6 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 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 10:53:59,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:53:59,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 420 [2023-01-28 10:53:59,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:54:09,115 INFO L130 PetriNetUnfolder]: 41800/61210 cut-off events. [2023-01-28 10:54:09,115 INFO L131 PetriNetUnfolder]: For 689343/689343 co-relation queries the response was YES. [2023-01-28 10:54:09,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366155 conditions, 61210 events. 41800/61210 cut-off events. For 689343/689343 co-relation queries the response was YES. Maximal size of possible extension queue 2382. Compared 427813 event pairs, 13356 based on Foata normal form. 158/61366 useless extension candidates. Maximal degree in co-relation 358977. Up to 60114 conditions per place. [2023-01-28 10:54:09,787 INFO L137 encePairwiseOnDemand]: 414/420 looper letters, 616 selfloop transitions, 78 changer transitions 35/729 dead transitions. [2023-01-28 10:54:09,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 729 transitions, 13211 flow [2023-01-28 10:54:09,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:54:09,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:54:09,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1304 transitions. [2023-01-28 10:54:09,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435374149659864 [2023-01-28 10:54:09,789 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1304 transitions. [2023-01-28 10:54:09,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1304 transitions. [2023-01-28 10:54:09,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:54:09,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1304 transitions. [2023-01-28 10:54:09,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 186.28571428571428) internal successors, (1304), 7 states have internal predecessors, (1304), 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 10:54:09,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 420.0) internal successors, (3360), 8 states have internal predecessors, (3360), 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 10:54:09,791 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 420.0) internal successors, (3360), 8 states have internal predecessors, (3360), 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 10:54:09,791 INFO L175 Difference]: Start difference. First operand has 195 places, 674 transitions, 11215 flow. Second operand 7 states and 1304 transitions. [2023-01-28 10:54:09,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 729 transitions, 13211 flow [2023-01-28 10:54:20,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 729 transitions, 12919 flow, removed 32 selfloop flow, removed 3 redundant places. [2023-01-28 10:54:20,747 INFO L231 Difference]: Finished difference. Result has 199 places, 670 transitions, 11023 flow [2023-01-28 10:54:20,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=10929, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11023, PETRI_PLACES=199, PETRI_TRANSITIONS=670} [2023-01-28 10:54:20,748 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2023-01-28 10:54:20,748 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 670 transitions, 11023 flow [2023-01-28 10:54:20,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 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 10:54:20,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:54:20,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:54:20,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-01-28 10:54:20,749 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:54:20,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:54:20,749 INFO L85 PathProgramCache]: Analyzing trace with hash -21062198, now seen corresponding path program 9 times [2023-01-28 10:54:20,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:54:20,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545443049] [2023-01-28 10:54:20,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:54:20,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:54:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:54:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:54:20,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:54:20,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545443049] [2023-01-28 10:54:20,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545443049] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:54:20,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:54:20,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:54:20,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575996897] [2023-01-28 10:54:20,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:54:20,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:54:20,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:54:20,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:54:20,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-01-28 10:54:20,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 420 [2023-01-28 10:54:20,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 670 transitions, 11023 flow. Second operand has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 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 10:54:20,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:54:20,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 420 [2023-01-28 10:54:20,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:54:30,270 INFO L130 PetriNetUnfolder]: 38600/56104 cut-off events. [2023-01-28 10:54:30,271 INFO L131 PetriNetUnfolder]: For 621315/621315 co-relation queries the response was YES. [2023-01-28 10:54:30,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340561 conditions, 56104 events. 38600/56104 cut-off events. For 621315/621315 co-relation queries the response was YES. Maximal size of possible extension queue 2110. Compared 381594 event pairs, 11452 based on Foata normal form. 544/56646 useless extension candidates. Maximal degree in co-relation 339559. Up to 51966 conditions per place. [2023-01-28 10:54:30,918 INFO L137 encePairwiseOnDemand]: 414/420 looper letters, 592 selfloop transitions, 148 changer transitions 2/742 dead transitions. [2023-01-28 10:54:30,918 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 742 transitions, 13371 flow [2023-01-28 10:54:30,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 10:54:30,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 10:54:30,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1155 transitions. [2023-01-28 10:54:30,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-01-28 10:54:30,920 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1155 transitions. [2023-01-28 10:54:30,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1155 transitions. [2023-01-28 10:54:30,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:54:30,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1155 transitions. [2023-01-28 10:54:30,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.5) internal successors, (1155), 6 states have internal predecessors, (1155), 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 10:54:30,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 420.0) internal successors, (2940), 7 states have internal predecessors, (2940), 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 10:54:30,922 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 420.0) internal successors, (2940), 7 states have internal predecessors, (2940), 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 10:54:30,922 INFO L175 Difference]: Start difference. First operand has 199 places, 670 transitions, 11023 flow. Second operand 6 states and 1155 transitions. [2023-01-28 10:54:30,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 742 transitions, 13371 flow [2023-01-28 10:54:42,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 742 transitions, 12927 flow, removed 142 selfloop flow, removed 5 redundant places. [2023-01-28 10:54:42,343 INFO L231 Difference]: Finished difference. Result has 198 places, 682 transitions, 11360 flow [2023-01-28 10:54:42,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=10575, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11360, PETRI_PLACES=198, PETRI_TRANSITIONS=682} [2023-01-28 10:54:42,344 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2023-01-28 10:54:42,344 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 682 transitions, 11360 flow [2023-01-28 10:54:42,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 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 10:54:42,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:54:42,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:54:42,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-01-28 10:54:42,344 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:54:42,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:54:42,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1569054635, now seen corresponding path program 1 times [2023-01-28 10:54:42,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:54:42,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884298484] [2023-01-28 10:54:42,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:54:42,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:54:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:54:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:54:42,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:54:42,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884298484] [2023-01-28 10:54:42,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884298484] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:54:42,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:54:42,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 10:54:42,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311659298] [2023-01-28 10:54:42,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:54:42,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 10:54:42,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:54:42,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 10:54:42,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 10:54:42,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 420 [2023-01-28 10:54:42,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 682 transitions, 11360 flow. Second operand has 5 states, 5 states have (on average 192.8) internal successors, (964), 5 states have internal predecessors, (964), 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 10:54:42,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:54:42,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 420 [2023-01-28 10:54:42,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:54:55,326 INFO L130 PetriNetUnfolder]: 52129/76065 cut-off events. [2023-01-28 10:54:55,326 INFO L131 PetriNetUnfolder]: For 850680/852570 co-relation queries the response was YES. [2023-01-28 10:54:55,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454232 conditions, 76065 events. 52129/76065 cut-off events. For 850680/852570 co-relation queries the response was YES. Maximal size of possible extension queue 3147. Compared 560101 event pairs, 8634 based on Foata normal form. 3287/79014 useless extension candidates. Maximal degree in co-relation 454142. Up to 29059 conditions per place. [2023-01-28 10:54:56,333 INFO L137 encePairwiseOnDemand]: 414/420 looper letters, 1008 selfloop transitions, 220 changer transitions 2/1346 dead transitions. [2023-01-28 10:54:56,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 1346 transitions, 24810 flow [2023-01-28 10:54:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 10:54:56,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 10:54:56,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1206 transitions. [2023-01-28 10:54:56,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2023-01-28 10:54:56,334 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1206 transitions. [2023-01-28 10:54:56,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1206 transitions. [2023-01-28 10:54:56,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:54:56,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1206 transitions. [2023-01-28 10:54:56,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 201.0) internal successors, (1206), 6 states have internal predecessors, (1206), 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 10:54:56,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 420.0) internal successors, (2940), 7 states have internal predecessors, (2940), 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 10:54:56,337 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 420.0) internal successors, (2940), 7 states have internal predecessors, (2940), 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 10:54:56,337 INFO L175 Difference]: Start difference. First operand has 198 places, 682 transitions, 11360 flow. Second operand 6 states and 1206 transitions. [2023-01-28 10:54:56,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 1346 transitions, 24810 flow [2023-01-28 10:55:13,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 1346 transitions, 23541 flow, removed 474 selfloop flow, removed 6 redundant places. [2023-01-28 10:55:13,152 INFO L231 Difference]: Finished difference. Result has 199 places, 773 transitions, 12766 flow [2023-01-28 10:55:13,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=10751, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12766, PETRI_PLACES=199, PETRI_TRANSITIONS=773} [2023-01-28 10:55:13,153 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2023-01-28 10:55:13,153 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 773 transitions, 12766 flow [2023-01-28 10:55:13,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 192.8) internal successors, (964), 5 states have internal predecessors, (964), 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 10:55:13,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:55:13,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:55:13,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-01-28 10:55:13,154 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:55:13,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:55:13,154 INFO L85 PathProgramCache]: Analyzing trace with hash -658408053, now seen corresponding path program 2 times [2023-01-28 10:55:13,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:55:13,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305142538] [2023-01-28 10:55:13,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:55:13,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:55:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:55:13,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:55:13,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:55:13,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305142538] [2023-01-28 10:55:13,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305142538] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:55:13,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207253340] [2023-01-28 10:55:13,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:55:13,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:55:13,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:55:13,369 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:55:13,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 10:55:13,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:55:13,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:55:13,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 10:55:13,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:55:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:55:13,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 10:55:13,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207253340] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:55:13,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 10:55:13,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-01-28 10:55:13,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563226756] [2023-01-28 10:55:13,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:55:13,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:55:13,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:55:13,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:55:13,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-01-28 10:55:13,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 420 [2023-01-28 10:55:13,604 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 773 transitions, 12766 flow. Second operand has 6 states, 6 states have (on average 178.5) internal successors, (1071), 6 states have internal predecessors, (1071), 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 10:55:13,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:55:13,604 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 420 [2023-01-28 10:55:13,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:55:36,268 INFO L130 PetriNetUnfolder]: 88853/127326 cut-off events. [2023-01-28 10:55:36,268 INFO L131 PetriNetUnfolder]: For 1553122/1553122 co-relation queries the response was YES. [2023-01-28 10:55:37,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 819598 conditions, 127326 events. 88853/127326 cut-off events. For 1553122/1553122 co-relation queries the response was YES. Maximal size of possible extension queue 4717. Compared 940162 event pairs, 6222 based on Foata normal form. 2118/129443 useless extension candidates. Maximal degree in co-relation 819506. Up to 37655 conditions per place. [2023-01-28 10:55:37,879 INFO L137 encePairwiseOnDemand]: 411/420 looper letters, 1250 selfloop transitions, 890 changer transitions 64/2204 dead transitions. [2023-01-28 10:55:37,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 2204 transitions, 37585 flow [2023-01-28 10:55:37,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 10:55:37,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 10:55:37,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2094 transitions. [2023-01-28 10:55:37,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45324675324675323 [2023-01-28 10:55:37,881 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2094 transitions. [2023-01-28 10:55:37,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2094 transitions. [2023-01-28 10:55:37,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:55:37,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2094 transitions. [2023-01-28 10:55:37,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 190.36363636363637) internal successors, (2094), 11 states have internal predecessors, (2094), 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 10:55:37,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 420.0) internal successors, (5040), 12 states have internal predecessors, (5040), 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 10:55:37,885 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 420.0) internal successors, (5040), 12 states have internal predecessors, (5040), 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 10:55:37,885 INFO L175 Difference]: Start difference. First operand has 199 places, 773 transitions, 12766 flow. Second operand 11 states and 2094 transitions. [2023-01-28 10:55:37,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 2204 transitions, 37585 flow [2023-01-28 10:56:34,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 2204 transitions, 37470 flow, removed 57 selfloop flow, removed 1 redundant places. [2023-01-28 10:56:34,831 INFO L231 Difference]: Finished difference. Result has 218 places, 1405 transitions, 26739 flow [2023-01-28 10:56:34,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=12350, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=26739, PETRI_PLACES=218, PETRI_TRANSITIONS=1405} [2023-01-28 10:56:34,832 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2023-01-28 10:56:34,832 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 1405 transitions, 26739 flow [2023-01-28 10:56:34,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 178.5) internal successors, (1071), 6 states have internal predecessors, (1071), 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 10:56:34,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:56:34,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:56:34,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 10:56:35,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-01-28 10:56:35,037 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-28 10:56:35,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:56:35,037 INFO L85 PathProgramCache]: Analyzing trace with hash -223242563, now seen corresponding path program 3 times [2023-01-28 10:56:35,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:56:35,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559647265] [2023-01-28 10:56:35,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:56:35,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:56:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:56:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:56:35,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:56:35,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559647265] [2023-01-28 10:56:35,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559647265] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:56:35,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380847738] [2023-01-28 10:56:35,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:56:35,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:56:35,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:56:35,250 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:56:35,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 10:56:35,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:56:35,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:56:35,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 16 conjunts are in the unsatisfiable core [2023-01-28 10:56:35,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:56:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:56:35,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 10:56:35,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380847738] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:56:35,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 10:56:35,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2023-01-28 10:56:35,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799801905] [2023-01-28 10:56:35,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:56:35,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 10:56:35,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:56:35,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 10:56:35,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-01-28 10:56:35,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 420 [2023-01-28 10:56:35,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 1405 transitions, 26739 flow. Second operand has 8 states, 8 states have (on average 180.125) internal successors, (1441), 8 states have internal predecessors, (1441), 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 10:56:35,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:56:35,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 420 [2023-01-28 10:56:35,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand