/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 BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 03:12:52,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 03:12:52,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 03:12:52,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 03:12:52,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 03:12:52,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 03:12:52,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 03:12:52,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 03:12:52,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 03:12:52,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 03:12:52,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 03:12:52,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 03:12:52,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 03:12:52,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 03:12:52,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 03:12:52,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 03:12:52,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 03:12:52,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 03:12:52,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 03:12:52,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 03:12:52,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 03:12:52,910 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 03:12:52,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 03:12:52,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 03:12:52,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 03:12:52,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 03:12:52,919 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 03:12:52,920 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 03:12:52,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 03:12:52,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 03:12:52,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 03:12:52,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 03:12:52,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 03:12:52,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 03:12:52,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 03:12:52,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 03:12:52,924 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 03:12:52,944 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 03:12:52,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 03:12:52,945 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 03:12:52,945 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 03:12:52,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 03:12:52,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 03:12:52,946 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 03:12:52,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 03:12:52,946 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 03:12:52,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 03:12:52,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 03:12:52,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 03:12:52,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 03:12:52,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 03:12:52,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 03:12:52,947 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 03:12:52,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 03:12:52,947 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 03:12:52,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 03:12:52,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 03:12:52,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 03:12:52,948 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 03:12:52,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 03:12:52,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 03:12:52,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 03:12:52,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 03:12:52,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 03:12:52,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 03:12:52,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 03:12:52,949 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 03:12:52,949 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 03:12:52,949 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 03:12:53,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 03:12:53,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 03:12:53,139 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 03:12:53,140 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 03:12:53,140 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 03:12:53,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c [2023-01-28 03:12:53,998 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 03:12:54,186 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 03:12:54,187 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c [2023-01-28 03:12:54,190 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/997c88a79/7b84c05b68ea4ee3938aadbe62cb6884/FLAG52b22f69b [2023-01-28 03:12:54,199 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/997c88a79/7b84c05b68ea4ee3938aadbe62cb6884 [2023-01-28 03:12:54,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 03:12:54,202 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 03:12:54,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 03:12:54,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 03:12:54,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 03:12:54,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 03:12:54" (1/1) ... [2023-01-28 03:12:54,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@405aa80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:12:54, skipping insertion in model container [2023-01-28 03:12:54,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 03:12:54" (1/1) ... [2023-01-28 03:12:54,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 03:12:54,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 03:12:54,346 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/mult-comm.wvr.c[1910,1923] [2023-01-28 03:12:54,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 03:12:54,359 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 03:12:54,376 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/mult-comm.wvr.c[1910,1923] [2023-01-28 03:12:54,380 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 03:12:54,389 INFO L208 MainTranslator]: Completed translation [2023-01-28 03:12:54,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:12:54 WrapperNode [2023-01-28 03:12:54,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 03:12:54,392 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 03:12:54,392 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 03:12:54,392 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 03:12:54,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:12:54" (1/1) ... [2023-01-28 03:12:54,402 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:12:54" (1/1) ... [2023-01-28 03:12:54,418 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2023-01-28 03:12:54,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 03:12:54,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 03:12:54,419 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 03:12:54,419 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 03:12:54,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:12:54" (1/1) ... [2023-01-28 03:12:54,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:12:54" (1/1) ... [2023-01-28 03:12:54,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:12:54" (1/1) ... [2023-01-28 03:12:54,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:12:54" (1/1) ... [2023-01-28 03:12:54,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:12:54" (1/1) ... [2023-01-28 03:12:54,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:12:54" (1/1) ... [2023-01-28 03:12:54,445 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:12:54" (1/1) ... [2023-01-28 03:12:54,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:12:54" (1/1) ... [2023-01-28 03:12:54,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 03:12:54,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 03:12:54,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 03:12:54,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 03:12:54,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:12:54" (1/1) ... [2023-01-28 03:12:54,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 03:12:54,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:12:54,471 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 03:12:54,488 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 03:12:54,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 03:12:54,502 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 03:12:54,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 03:12:54,502 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 03:12:54,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 03:12:54,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 03:12:54,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 03:12:54,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 03:12:54,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 03:12:54,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 03:12:54,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 03:12:54,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 03:12:54,504 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 03:12:54,576 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 03:12:54,578 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 03:12:54,704 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 03:12:54,709 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 03:12:54,709 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-28 03:12:54,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:12:54 BoogieIcfgContainer [2023-01-28 03:12:54,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 03:12:54,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 03:12:54,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 03:12:54,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 03:12:54,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 03:12:54" (1/3) ... [2023-01-28 03:12:54,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fad4c26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:12:54, skipping insertion in model container [2023-01-28 03:12:54,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:12:54" (2/3) ... [2023-01-28 03:12:54,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fad4c26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:12:54, skipping insertion in model container [2023-01-28 03:12:54,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:12:54" (3/3) ... [2023-01-28 03:12:54,716 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2023-01-28 03:12:54,731 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 03:12:54,731 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 03:12:54,731 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 03:12:54,797 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 03:12:54,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 77 transitions, 170 flow [2023-01-28 03:12:54,856 INFO L130 PetriNetUnfolder]: 5/75 cut-off events. [2023-01-28 03:12:54,857 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 03:12:54,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 5/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2023-01-28 03:12:54,861 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 77 transitions, 170 flow [2023-01-28 03:12:54,864 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 67 transitions, 146 flow [2023-01-28 03:12:54,866 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 03:12:54,871 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 67 transitions, 146 flow [2023-01-28 03:12:54,873 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 67 transitions, 146 flow [2023-01-28 03:12:54,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 67 transitions, 146 flow [2023-01-28 03:12:54,889 INFO L130 PetriNetUnfolder]: 5/67 cut-off events. [2023-01-28 03:12:54,889 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 03:12:54,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 67 events. 5/67 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2023-01-28 03:12:54,891 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-01-28 03:12:56,246 INFO L134 LiptonReduction]: Checked pairs total: 509 [2023-01-28 03:12:56,247 INFO L136 LiptonReduction]: Total number of compositions: 59 [2023-01-28 03:12:56,260 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 03:12:56,265 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;@4e21212d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 03:12:56,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 03:12:56,268 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-01-28 03:12:56,268 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 03:12:56,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:12:56,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:12:56,269 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:12:56,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:12:56,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1543000620, now seen corresponding path program 1 times [2023-01-28 03:12:56,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:12:56,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287708239] [2023-01-28 03:12:56,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:12:56,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:12:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:12:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:12:56,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:12:56,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287708239] [2023-01-28 03:12:56,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287708239] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:12:56,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:12:56,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 03:12:56,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740555121] [2023-01-28 03:12:56,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:12:56,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 03:12:56,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:12:56,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 03:12:56,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 03:12:56,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 136 [2023-01-28 03:12:56,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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 03:12:56,755 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:12:56,755 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 136 [2023-01-28 03:12:56,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:12:56,815 INFO L130 PetriNetUnfolder]: 65/114 cut-off events. [2023-01-28 03:12:56,815 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-01-28 03:12:56,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 114 events. 65/114 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 325 event pairs, 9 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-01-28 03:12:56,819 INFO L137 encePairwiseOnDemand]: 132/136 looper letters, 19 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2023-01-28 03:12:56,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 117 flow [2023-01-28 03:12:56,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 03:12:56,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 03:12:56,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 216 transitions. [2023-01-28 03:12:56,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2023-01-28 03:12:56,831 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 216 transitions. [2023-01-28 03:12:56,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 216 transitions. [2023-01-28 03:12:56,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:12:56,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 216 transitions. [2023-01-28 03:12:56,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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 03:12:56,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 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 03:12:56,841 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 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 03:12:56,842 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 216 transitions. [2023-01-28 03:12:56,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 117 flow [2023-01-28 03:12:56,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 103 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 03:12:56,846 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2023-01-28 03:12:56,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-01-28 03:12:56,851 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-01-28 03:12:56,851 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2023-01-28 03:12:56,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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 03:12:56,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:12:56,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:12:56,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 03:12:56,852 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:12:56,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:12:56,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1815553743, now seen corresponding path program 1 times [2023-01-28 03:12:56,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:12:56,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277249797] [2023-01-28 03:12:56,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:12:56,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:12:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:12:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:12:57,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:12:57,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277249797] [2023-01-28 03:12:57,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277249797] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:12:57,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456890104] [2023-01-28 03:12:57,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:12:57,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:12:57,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:12:57,052 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 03:12:57,061 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 03:12:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:12:57,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2023-01-28 03:12:57,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:12:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:12:57,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:12:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:12:57,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456890104] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:12:57,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:12:57,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-01-28 03:12:57,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451329648] [2023-01-28 03:12:57,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:12:57,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 03:12:57,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:12:57,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 03:12:57,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-01-28 03:12:57,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 136 [2023-01-28 03:12:57,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 9 states, 9 states have (on average 59.888888888888886) internal successors, (539), 9 states have internal predecessors, (539), 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 03:12:57,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:12:57,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 136 [2023-01-28 03:12:57,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:12:57,621 INFO L130 PetriNetUnfolder]: 75/137 cut-off events. [2023-01-28 03:12:57,622 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-01-28 03:12:57,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 137 events. 75/137 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 431 event pairs, 1 based on Foata normal form. 1/136 useless extension candidates. Maximal degree in co-relation 84. Up to 79 conditions per place. [2023-01-28 03:12:57,623 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 21 selfloop transitions, 5 changer transitions 15/42 dead transitions. [2023-01-28 03:12:57,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 42 transitions, 200 flow [2023-01-28 03:12:57,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 03:12:57,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 03:12:57,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 384 transitions. [2023-01-28 03:12:57,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2023-01-28 03:12:57,625 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 384 transitions. [2023-01-28 03:12:57,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 384 transitions. [2023-01-28 03:12:57,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:12:57,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 384 transitions. [2023-01-28 03:12:57,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 64.0) internal successors, (384), 6 states have internal predecessors, (384), 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 03:12:57,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 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 03:12:57,628 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 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 03:12:57,628 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 6 states and 384 transitions. [2023-01-28 03:12:57,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 42 transitions, 200 flow [2023-01-28 03:12:57,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 42 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 03:12:57,629 INFO L231 Difference]: Finished difference. Result has 26 places, 19 transitions, 78 flow [2023-01-28 03:12:57,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=78, PETRI_PLACES=26, PETRI_TRANSITIONS=19} [2023-01-28 03:12:57,630 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 6 predicate places. [2023-01-28 03:12:57,630 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 19 transitions, 78 flow [2023-01-28 03:12:57,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 59.888888888888886) internal successors, (539), 9 states have internal predecessors, (539), 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 03:12:57,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:12:57,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:12:57,639 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 03:12:57,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:12:57,837 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:12:57,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:12:57,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1901148465, now seen corresponding path program 1 times [2023-01-28 03:12:57,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:12:57,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315415735] [2023-01-28 03:12:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:12:57,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:12:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:12:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:12:57,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:12:57,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315415735] [2023-01-28 03:12:57,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315415735] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:12:57,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457102243] [2023-01-28 03:12:57,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:12:57,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:12:57,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:12:57,997 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 03:12:57,999 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 03:12:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:12:58,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 03:12:58,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:12:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:12:58,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:12:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:12:58,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457102243] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:12:58,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:12:58,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-01-28 03:12:58,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88902183] [2023-01-28 03:12:58,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:12:58,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 03:12:58,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:12:58,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 03:12:58,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-01-28 03:12:58,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 136 [2023-01-28 03:12:58,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 19 transitions, 78 flow. Second operand has 9 states, 9 states have (on average 59.888888888888886) internal successors, (539), 9 states have internal predecessors, (539), 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 03:12:58,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:12:58,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 136 [2023-01-28 03:12:58,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:12:58,555 INFO L130 PetriNetUnfolder]: 48/93 cut-off events. [2023-01-28 03:12:58,555 INFO L131 PetriNetUnfolder]: For 39/45 co-relation queries the response was YES. [2023-01-28 03:12:58,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 93 events. 48/93 cut-off events. For 39/45 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 201 event pairs, 8 based on Foata normal form. 7/99 useless extension candidates. Maximal degree in co-relation 255. Up to 69 conditions per place. [2023-01-28 03:12:58,556 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 17 selfloop transitions, 6 changer transitions 9/34 dead transitions. [2023-01-28 03:12:58,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 189 flow [2023-01-28 03:12:58,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 03:12:58,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 03:12:58,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 374 transitions. [2023-01-28 03:12:58,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-01-28 03:12:58,558 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 374 transitions. [2023-01-28 03:12:58,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 374 transitions. [2023-01-28 03:12:58,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:12:58,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 374 transitions. [2023-01-28 03:12:58,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 62.333333333333336) internal successors, (374), 6 states have internal predecessors, (374), 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 03:12:58,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 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 03:12:58,560 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 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 03:12:58,560 INFO L175 Difference]: Start difference. First operand has 26 places, 19 transitions, 78 flow. Second operand 6 states and 374 transitions. [2023-01-28 03:12:58,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 189 flow [2023-01-28 03:12:58,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 167 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-01-28 03:12:58,562 INFO L231 Difference]: Finished difference. Result has 29 places, 21 transitions, 94 flow [2023-01-28 03:12:58,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=94, PETRI_PLACES=29, PETRI_TRANSITIONS=21} [2023-01-28 03:12:58,562 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 9 predicate places. [2023-01-28 03:12:58,562 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 21 transitions, 94 flow [2023-01-28 03:12:58,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 59.888888888888886) internal successors, (539), 9 states have internal predecessors, (539), 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 03:12:58,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:12:58,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:12:58,569 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 03:12:58,767 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,SelfDestructingSolverStorable2 [2023-01-28 03:12:58,768 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:12:58,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:12:58,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1653348717, now seen corresponding path program 2 times [2023-01-28 03:12:58,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:12:58,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234924846] [2023-01-28 03:12:58,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:12:58,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:12:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:12:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:12:58,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:12:58,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234924846] [2023-01-28 03:12:58,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234924846] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:12:58,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861445121] [2023-01-28 03:12:58,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 03:12:58,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:12:58,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:12:58,957 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 03:12:58,959 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 03:12:59,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:12:59,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:12:59,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 03:12:59,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:12:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:12:59,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:12:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:12:59,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861445121] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:12:59,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:12:59,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 12 [2023-01-28 03:12:59,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602710684] [2023-01-28 03:12:59,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:12:59,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 03:12:59,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:12:59,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 03:12:59,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-01-28 03:12:59,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 136 [2023-01-28 03:12:59,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 21 transitions, 94 flow. Second operand has 14 states, 14 states have (on average 52.42857142857143) internal successors, (734), 14 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 03:12:59,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:12:59,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 136 [2023-01-28 03:12:59,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:12:59,504 INFO L130 PetriNetUnfolder]: 113/211 cut-off events. [2023-01-28 03:12:59,505 INFO L131 PetriNetUnfolder]: For 86/86 co-relation queries the response was YES. [2023-01-28 03:12:59,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 211 events. 113/211 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 674 event pairs, 9 based on Foata normal form. 3/214 useless extension candidates. Maximal degree in co-relation 601. Up to 92 conditions per place. [2023-01-28 03:12:59,506 INFO L137 encePairwiseOnDemand]: 129/136 looper letters, 41 selfloop transitions, 19 changer transitions 12/72 dead transitions. [2023-01-28 03:12:59,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 72 transitions, 397 flow [2023-01-28 03:12:59,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 03:12:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 03:12:59,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 624 transitions. [2023-01-28 03:12:59,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41711229946524064 [2023-01-28 03:12:59,509 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 624 transitions. [2023-01-28 03:12:59,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 624 transitions. [2023-01-28 03:12:59,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:12:59,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 624 transitions. [2023-01-28 03:12:59,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 56.72727272727273) internal successors, (624), 11 states have internal predecessors, (624), 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 03:12:59,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 136.0) internal successors, (1632), 12 states have internal predecessors, (1632), 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 03:12:59,513 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 136.0) internal successors, (1632), 12 states have internal predecessors, (1632), 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 03:12:59,513 INFO L175 Difference]: Start difference. First operand has 29 places, 21 transitions, 94 flow. Second operand 11 states and 624 transitions. [2023-01-28 03:12:59,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 72 transitions, 397 flow [2023-01-28 03:12:59,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 72 transitions, 384 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-28 03:12:59,515 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 198 flow [2023-01-28 03:12:59,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=198, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2023-01-28 03:12:59,515 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 20 predicate places. [2023-01-28 03:12:59,516 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 198 flow [2023-01-28 03:12:59,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.42857142857143) internal successors, (734), 14 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 03:12:59,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:12:59,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:12:59,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 03:12:59,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:12:59,721 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:12:59,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:12:59,721 INFO L85 PathProgramCache]: Analyzing trace with hash -73524693, now seen corresponding path program 3 times [2023-01-28 03:12:59,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:12:59,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825678319] [2023-01-28 03:12:59,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:12:59,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:12:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:12:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:12:59,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:12:59,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825678319] [2023-01-28 03:12:59,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825678319] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:12:59,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244602114] [2023-01-28 03:12:59,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 03:12:59,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:12:59,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:12:59,916 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 03:12:59,918 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 03:12:59,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 03:12:59,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:12:59,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 03:12:59,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:13:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:13:00,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:13:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:13:00,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244602114] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:13:00,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:13:00,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 11 [2023-01-28 03:13:00,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841503782] [2023-01-28 03:13:00,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:13:00,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 03:13:00,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:13:00,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 03:13:00,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-01-28 03:13:00,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 136 [2023-01-28 03:13:00,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 198 flow. Second operand has 13 states, 13 states have (on average 52.46153846153846) internal successors, (682), 13 states have internal predecessors, (682), 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 03:13:00,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:13:00,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 136 [2023-01-28 03:13:00,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:13:00,495 INFO L130 PetriNetUnfolder]: 136/263 cut-off events. [2023-01-28 03:13:00,495 INFO L131 PetriNetUnfolder]: For 361/361 co-relation queries the response was YES. [2023-01-28 03:13:00,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 263 events. 136/263 cut-off events. For 361/361 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 928 event pairs, 23 based on Foata normal form. 3/262 useless extension candidates. Maximal degree in co-relation 876. Up to 180 conditions per place. [2023-01-28 03:13:00,497 INFO L137 encePairwiseOnDemand]: 129/136 looper letters, 44 selfloop transitions, 18 changer transitions 12/74 dead transitions. [2023-01-28 03:13:00,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 506 flow [2023-01-28 03:13:00,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 03:13:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 03:13:00,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 565 transitions. [2023-01-28 03:13:00,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41544117647058826 [2023-01-28 03:13:00,499 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 565 transitions. [2023-01-28 03:13:00,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 565 transitions. [2023-01-28 03:13:00,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:13:00,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 565 transitions. [2023-01-28 03:13:00,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 56.5) internal successors, (565), 10 states have internal predecessors, (565), 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 03:13:00,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 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 03:13:00,502 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 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 03:13:00,502 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 198 flow. Second operand 10 states and 565 transitions. [2023-01-28 03:13:00,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 506 flow [2023-01-28 03:13:00,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 74 transitions, 438 flow, removed 23 selfloop flow, removed 5 redundant places. [2023-01-28 03:13:00,505 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 272 flow [2023-01-28 03:13:00,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=272, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2023-01-28 03:13:00,505 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 29 predicate places. [2023-01-28 03:13:00,505 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 272 flow [2023-01-28 03:13:00,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 52.46153846153846) internal successors, (682), 13 states have internal predecessors, (682), 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 03:13:00,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:13:00,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:13:00,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 03:13:00,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:13:00,711 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:13:00,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:13:00,711 INFO L85 PathProgramCache]: Analyzing trace with hash -2058058253, now seen corresponding path program 2 times [2023-01-28 03:13:00,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:13:00,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586256004] [2023-01-28 03:13:00,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:13:00,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:13:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:13:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:13:00,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:13:00,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586256004] [2023-01-28 03:13:00,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586256004] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:13:00,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680419438] [2023-01-28 03:13:00,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 03:13:00,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:13:00,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:13:00,852 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 03:13:00,854 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 03:13:00,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:13:00,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:13:00,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 03:13:00,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:13:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:13:00,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:13:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:13:01,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680419438] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:13:01,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:13:01,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-01-28 03:13:01,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715274146] [2023-01-28 03:13:01,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:13:01,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 03:13:01,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:13:01,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 03:13:01,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-01-28 03:13:01,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 136 [2023-01-28 03:13:01,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 272 flow. Second operand has 10 states, 10 states have (on average 59.8) internal successors, (598), 10 states have internal predecessors, (598), 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 03:13:01,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:13:01,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 136 [2023-01-28 03:13:01,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:13:01,783 INFO L130 PetriNetUnfolder]: 166/329 cut-off events. [2023-01-28 03:13:01,783 INFO L131 PetriNetUnfolder]: For 677/687 co-relation queries the response was YES. [2023-01-28 03:13:01,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1193 conditions, 329 events. 166/329 cut-off events. For 677/687 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1360 event pairs, 22 based on Foata normal form. 9/324 useless extension candidates. Maximal degree in co-relation 1121. Up to 233 conditions per place. [2023-01-28 03:13:01,785 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 55 selfloop transitions, 18 changer transitions 6/82 dead transitions. [2023-01-28 03:13:01,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 82 transitions, 600 flow [2023-01-28 03:13:01,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 03:13:01,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 03:13:01,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 572 transitions. [2023-01-28 03:13:01,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4673202614379085 [2023-01-28 03:13:01,787 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 572 transitions. [2023-01-28 03:13:01,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 572 transitions. [2023-01-28 03:13:01,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:13:01,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 572 transitions. [2023-01-28 03:13:01,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 63.55555555555556) internal successors, (572), 9 states have internal predecessors, (572), 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 03:13:01,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 136.0) internal successors, (1360), 10 states have internal predecessors, (1360), 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 03:13:01,790 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 136.0) internal successors, (1360), 10 states have internal predecessors, (1360), 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 03:13:01,790 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 272 flow. Second operand 9 states and 572 transitions. [2023-01-28 03:13:01,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 82 transitions, 600 flow [2023-01-28 03:13:01,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 82 transitions, 551 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-01-28 03:13:01,793 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 337 flow [2023-01-28 03:13:01,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=337, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2023-01-28 03:13:01,793 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 37 predicate places. [2023-01-28 03:13:01,793 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 337 flow [2023-01-28 03:13:01,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 59.8) internal successors, (598), 10 states have internal predecessors, (598), 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 03:13:01,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:13:01,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:13:01,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 03:13:01,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:13:01,995 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:13:01,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:13:01,995 INFO L85 PathProgramCache]: Analyzing trace with hash 587325377, now seen corresponding path program 3 times [2023-01-28 03:13:01,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:13:01,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716315333] [2023-01-28 03:13:01,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:13:01,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:13:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:13:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:13:02,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:13:02,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716315333] [2023-01-28 03:13:02,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716315333] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:13:02,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096726270] [2023-01-28 03:13:02,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 03:13:02,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:13:02,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:13:02,116 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 03:13:02,143 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 03:13:02,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 03:13:02,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:13:02,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 03:13:02,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:13:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:13:02,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:13:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:13:02,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096726270] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:13:02,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:13:02,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2023-01-28 03:13:02,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633520761] [2023-01-28 03:13:02,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:13:02,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 03:13:02,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:13:02,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 03:13:02,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-01-28 03:13:02,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 136 [2023-01-28 03:13:02,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 337 flow. Second operand has 11 states, 11 states have (on average 59.72727272727273) internal successors, (657), 11 states have internal predecessors, (657), 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 03:13:02,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:13:02,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 136 [2023-01-28 03:13:02,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:13:02,468 INFO L130 PetriNetUnfolder]: 210/411 cut-off events. [2023-01-28 03:13:02,468 INFO L131 PetriNetUnfolder]: For 896/906 co-relation queries the response was YES. [2023-01-28 03:13:02,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1538 conditions, 411 events. 210/411 cut-off events. For 896/906 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1804 event pairs, 42 based on Foata normal form. 9/405 useless extension candidates. Maximal degree in co-relation 1452. Up to 298 conditions per place. [2023-01-28 03:13:02,471 INFO L137 encePairwiseOnDemand]: 130/136 looper letters, 59 selfloop transitions, 22 changer transitions 7/91 dead transitions. [2023-01-28 03:13:02,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 91 transitions, 692 flow [2023-01-28 03:13:02,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 03:13:02,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 03:13:02,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 630 transitions. [2023-01-28 03:13:02,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4632352941176471 [2023-01-28 03:13:02,473 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 630 transitions. [2023-01-28 03:13:02,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 630 transitions. [2023-01-28 03:13:02,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:13:02,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 630 transitions. [2023-01-28 03:13:02,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 63.0) internal successors, (630), 10 states have internal predecessors, (630), 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 03:13:02,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 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 03:13:02,476 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 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 03:13:02,476 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 337 flow. Second operand 10 states and 630 transitions. [2023-01-28 03:13:02,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 91 transitions, 692 flow [2023-01-28 03:13:02,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 91 transitions, 638 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-01-28 03:13:02,481 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 425 flow [2023-01-28 03:13:02,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=425, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2023-01-28 03:13:02,482 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 46 predicate places. [2023-01-28 03:13:02,482 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 425 flow [2023-01-28 03:13:02,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 59.72727272727273) internal successors, (657), 11 states have internal predecessors, (657), 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 03:13:02,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:13:02,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:13:02,487 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 03:13:02,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:13:02,687 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 03:13:02,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:13:02,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1884096032, now seen corresponding path program 1 times [2023-01-28 03:13:02,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:13:02,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027680533] [2023-01-28 03:13:02,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:13:02,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:13:02,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:13:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:13:03,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:13:03,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027680533] [2023-01-28 03:13:03,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027680533] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:13:03,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910199278] [2023-01-28 03:13:03,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:13:03,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:13:03,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:13:03,036 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 03:13:03,038 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 03:13:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:13:03,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 03:13:03,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:13:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:13:03,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:13:27,310 WARN L222 SmtUtils]: Spent 21.92s on a formula simplification. DAG size of input: 1170 DAG size of output: 1127 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-01-28 03:15:43,137 WARN L222 SmtUtils]: Spent 5.59s on a formula simplification. DAG size of input: 689 DAG size of output: 658 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Received shutdown request... [2023-01-28 03:27:34,657 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 03:27:34,659 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 03:27:35,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-01-28 03:27:35,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown