/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-0612a5f-m [2022-09-20 21:22:08,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-20 21:22:08,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-20 21:22:08,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-20 21:22:08,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-20 21:22:08,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-20 21:22:08,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-20 21:22:08,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-20 21:22:08,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-20 21:22:08,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-20 21:22:08,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-20 21:22:08,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-20 21:22:08,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-20 21:22:08,587 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-20 21:22:08,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-20 21:22:08,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-20 21:22:08,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-20 21:22:08,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-20 21:22:08,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-20 21:22:08,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-20 21:22:08,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-20 21:22:08,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-20 21:22:08,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-20 21:22:08,603 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-20 21:22:08,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-20 21:22:08,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-20 21:22:08,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-20 21:22:08,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-20 21:22:08,613 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-20 21:22:08,613 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-20 21:22:08,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-20 21:22:08,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-20 21:22:08,615 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-20 21:22:08,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-20 21:22:08,616 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-20 21:22:08,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-20 21:22:08,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-20 21:22:08,617 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-20 21:22:08,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-20 21:22:08,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-20 21:22:08,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-20 21:22:08,619 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-NoLbe.epf [2022-09-20 21:22:08,655 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-20 21:22:08,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-20 21:22:08,656 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-20 21:22:08,656 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-20 21:22:08,657 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-20 21:22:08,657 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-20 21:22:08,657 INFO L138 SettingsManager]: * Use SBE=true [2022-09-20 21:22:08,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-20 21:22:08,657 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-20 21:22:08,657 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-20 21:22:08,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-20 21:22:08,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-20 21:22:08,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-20 21:22:08,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-20 21:22:08,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-20 21:22:08,659 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-20 21:22:08,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-20 21:22:08,659 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-20 21:22:08,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-20 21:22:08,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-20 21:22:08,659 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-20 21:22:08,660 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-20 21:22:08,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-20 21:22:08,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 21:22:08,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-20 21:22:08,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-20 21:22:08,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-20 21:22:08,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-20 21:22:08,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-20 21:22:08,662 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-20 21:22:08,662 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-20 21:22:08,662 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-20 21:22:08,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-20 21:22:08,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-20 21:22:08,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-20 21:22:08,890 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-20 21:22:08,890 INFO L275 PluginConnector]: CDTParser initialized [2022-09-20 21:22:08,891 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-09-20 21:22:08,954 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a165efb5/8ee6b8a0381f42f8b72166dc26838767/FLAG2a40af61c [2022-09-20 21:22:09,336 INFO L306 CDTParser]: Found 1 translation units. [2022-09-20 21:22:09,336 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-09-20 21:22:09,362 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a165efb5/8ee6b8a0381f42f8b72166dc26838767/FLAG2a40af61c [2022-09-20 21:22:09,757 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a165efb5/8ee6b8a0381f42f8b72166dc26838767 [2022-09-20 21:22:09,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-20 21:22:09,760 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-20 21:22:09,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-20 21:22:09,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-20 21:22:09,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-20 21:22:09,764 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 09:22:09" (1/1) ... [2022-09-20 21:22:09,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a321475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:22:09, skipping insertion in model container [2022-09-20 21:22:09,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 09:22:09" (1/1) ... [2022-09-20 21:22:09,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-20 21:22:09,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-20 21:22:09,932 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-09-20 21:22:09,934 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 21:22:09,940 INFO L203 MainTranslator]: Completed pre-run [2022-09-20 21:22:09,958 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-09-20 21:22:09,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 21:22:09,969 INFO L208 MainTranslator]: Completed translation [2022-09-20 21:22:09,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:22:09 WrapperNode [2022-09-20 21:22:09,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-20 21:22:09,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-20 21:22:09,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-20 21:22:09,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-20 21:22:09,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:22:09" (1/1) ... [2022-09-20 21:22:09,982 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:22:09" (1/1) ... [2022-09-20 21:22:10,002 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2022-09-20 21:22:10,002 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-20 21:22:10,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-20 21:22:10,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-20 21:22:10,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-20 21:22:10,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:22:09" (1/1) ... [2022-09-20 21:22:10,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:22:09" (1/1) ... [2022-09-20 21:22:10,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:22:09" (1/1) ... [2022-09-20 21:22:10,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:22:09" (1/1) ... [2022-09-20 21:22:10,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:22:09" (1/1) ... [2022-09-20 21:22:10,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:22:09" (1/1) ... [2022-09-20 21:22:10,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:22:09" (1/1) ... [2022-09-20 21:22:10,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-20 21:22:10,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-20 21:22:10,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-20 21:22:10,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-20 21:22:10,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:22:09" (1/1) ... [2022-09-20 21:22:10,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 21:22:10,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:22:10,057 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) [2022-09-20 21:22:10,061 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 [2022-09-20 21:22:10,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-20 21:22:10,089 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-20 21:22:10,089 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-20 21:22:10,089 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-20 21:22:10,089 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-20 21:22:10,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-20 21:22:10,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-20 21:22:10,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-20 21:22:10,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-20 21:22:10,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-20 21:22:10,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-20 21:22:10,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-20 21:22:10,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-20 21:22:10,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-20 21:22:10,091 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-20 21:22:10,149 INFO L234 CfgBuilder]: Building ICFG [2022-09-20 21:22:10,151 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-20 21:22:10,274 INFO L275 CfgBuilder]: Performing block encoding [2022-09-20 21:22:10,303 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-20 21:22:10,303 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-09-20 21:22:10,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 09:22:10 BoogieIcfgContainer [2022-09-20 21:22:10,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-20 21:22:10,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-20 21:22:10,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-20 21:22:10,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-20 21:22:10,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 09:22:09" (1/3) ... [2022-09-20 21:22:10,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be510da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 09:22:10, skipping insertion in model container [2022-09-20 21:22:10,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:22:09" (2/3) ... [2022-09-20 21:22:10,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5be510da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 09:22:10, skipping insertion in model container [2022-09-20 21:22:10,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 09:22:10" (3/3) ... [2022-09-20 21:22:10,311 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2022-09-20 21:22:10,325 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-20 21:22:10,325 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-09-20 21:22:10,325 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-20 21:22:10,372 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-09-20 21:22:10,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-09-20 21:22:10,451 INFO L130 PetriNetUnfolder]: 6/82 cut-off events. [2022-09-20 21:22:10,452 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-20 21:22:10,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 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. 0/75 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-09-20 21:22:10,455 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-09-20 21:22:10,471 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-09-20 21:22:10,484 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 21:22:10,489 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@41407207, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 21:22:10,489 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-09-20 21:22:10,515 INFO L130 PetriNetUnfolder]: 6/72 cut-off events. [2022-09-20 21:22:10,515 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-20 21:22:10,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:22:10,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:22:10,517 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:22:10,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:22:10,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1254133550, now seen corresponding path program 1 times [2022-09-20 21:22:10,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:22:10,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751110598] [2022-09-20 21:22:10,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:10,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:22:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:10,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:10,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:22:10,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751110598] [2022-09-20 21:22:10,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751110598] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:22:10,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:22:10,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 21:22:10,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014838354] [2022-09-20 21:22:10,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:22:10,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-09-20 21:22:10,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:22:10,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-09-20 21:22:10,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-09-20 21:22:10,742 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 84 [2022-09-20 21:22:10,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:10,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:22:10,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 84 [2022-09-20 21:22:10,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:22:10,811 INFO L130 PetriNetUnfolder]: 4/76 cut-off events. [2022-09-20 21:22:10,811 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-09-20 21:22:10,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 76 events. 4/76 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 7/78 useless extension candidates. Maximal degree in co-relation 49. Up to 9 conditions per place. [2022-09-20 21:22:10,814 INFO L137 encePairwiseOnDemand]: 80/84 looper letters, 5 selfloop transitions, 0 changer transitions 2/69 dead transitions. [2022-09-20 21:22:10,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 160 flow [2022-09-20 21:22:10,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-20 21:22:10,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-09-20 21:22:10,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 157 transitions. [2022-09-20 21:22:10,825 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9345238095238095 [2022-09-20 21:22:10,825 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 157 transitions. [2022-09-20 21:22:10,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 157 transitions. [2022-09-20 21:22:10,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:22:10,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 157 transitions. [2022-09-20 21:22:10,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 78.5) internal successors, (157), 2 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:10,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:10,834 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:10,839 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 2 states and 157 transitions. [2022-09-20 21:22:10,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 160 flow [2022-09-20 21:22:10,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 152 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-09-20 21:22:10,848 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 138 flow [2022-09-20 21:22:10,850 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2022-09-20 21:22:10,853 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2022-09-20 21:22:10,853 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 138 flow [2022-09-20 21:22:10,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:10,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:22:10,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:22:10,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-20 21:22:10,854 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:22:10,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:22:10,855 INFO L85 PathProgramCache]: Analyzing trace with hash -2118757903, now seen corresponding path program 1 times [2022-09-20 21:22:10,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:22:10,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513420748] [2022-09-20 21:22:10,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:10,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:22:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:11,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:22:11,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513420748] [2022-09-20 21:22:11,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513420748] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:22:11,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:22:11,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-20 21:22:11,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281645530] [2022-09-20 21:22:11,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:22:11,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 21:22:11,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:22:11,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 21:22:11,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-09-20 21:22:11,161 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 84 [2022-09-20 21:22:11,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 57.833333333333336) internal successors, (347), 6 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:11,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:22:11,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 84 [2022-09-20 21:22:11,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:22:11,300 INFO L130 PetriNetUnfolder]: 50/172 cut-off events. [2022-09-20 21:22:11,300 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-09-20 21:22:11,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 172 events. 50/172 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 491 event pairs, 19 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 284. Up to 69 conditions per place. [2022-09-20 21:22:11,303 INFO L137 encePairwiseOnDemand]: 78/84 looper letters, 24 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2022-09-20 21:22:11,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 74 transitions, 211 flow [2022-09-20 21:22:11,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-09-20 21:22:11,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-09-20 21:22:11,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 360 transitions. [2022-09-20 21:22:11,308 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2022-09-20 21:22:11,308 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 360 transitions. [2022-09-20 21:22:11,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 360 transitions. [2022-09-20 21:22:11,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:22:11,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 360 transitions. [2022-09-20 21:22:11,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:11,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:11,315 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:11,315 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 138 flow. Second operand 6 states and 360 transitions. [2022-09-20 21:22:11,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 74 transitions, 211 flow [2022-09-20 21:22:11,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 21:22:11,318 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 156 flow [2022-09-20 21:22:11,318 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2022-09-20 21:22:11,319 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2022-09-20 21:22:11,319 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 156 flow [2022-09-20 21:22:11,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.833333333333336) internal successors, (347), 6 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:11,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:22:11,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:22:11,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-20 21:22:11,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:22:11,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:22:11,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1443372825, now seen corresponding path program 1 times [2022-09-20 21:22:11,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:22:11,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230954153] [2022-09-20 21:22:11,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:11,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:22:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:11,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:22:11,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230954153] [2022-09-20 21:22:11,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230954153] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:22:11,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352700601] [2022-09-20 21:22:11,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:11,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:11,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:22:11,522 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) [2022-09-20 21:22:11,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-09-20 21:22:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:11,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-09-20 21:22:11,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:22:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:11,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:22:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:11,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352700601] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:22:11,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:22:11,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2022-09-20 21:22:11,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432879339] [2022-09-20 21:22:11,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:22:11,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-09-20 21:22:11,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:22:11,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-09-20 21:22:11,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-09-20 21:22:11,868 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 84 [2022-09-20 21:22:11,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 156 flow. Second operand has 8 states, 8 states have (on average 66.125) internal successors, (529), 8 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:11,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:22:11,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 84 [2022-09-20 21:22:11,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:22:12,096 INFO L130 PetriNetUnfolder]: 91/351 cut-off events. [2022-09-20 21:22:12,096 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-09-20 21:22:12,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 351 events. 91/351 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1530 event pairs, 5 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 621. Up to 59 conditions per place. [2022-09-20 21:22:12,103 INFO L137 encePairwiseOnDemand]: 76/84 looper letters, 46 selfloop transitions, 24 changer transitions 0/121 dead transitions. [2022-09-20 21:22:12,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 121 transitions, 444 flow [2022-09-20 21:22:12,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-09-20 21:22:12,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-09-20 21:22:12,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 704 transitions. [2022-09-20 21:22:12,110 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8380952380952381 [2022-09-20 21:22:12,110 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 704 transitions. [2022-09-20 21:22:12,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 704 transitions. [2022-09-20 21:22:12,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:22:12,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 704 transitions. [2022-09-20 21:22:12,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 70.4) internal successors, (704), 10 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:12,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 84.0) internal successors, (924), 11 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:12,119 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 84.0) internal successors, (924), 11 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:12,119 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 156 flow. Second operand 10 states and 704 transitions. [2022-09-20 21:22:12,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 121 transitions, 444 flow [2022-09-20 21:22:12,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 121 transitions, 430 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-09-20 21:22:12,126 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 323 flow [2022-09-20 21:22:12,126 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=323, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2022-09-20 21:22:12,128 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2022-09-20 21:22:12,128 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 323 flow [2022-09-20 21:22:12,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 66.125) internal successors, (529), 8 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:12,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:22:12,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:22:12,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-09-20 21:22:12,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:12,344 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:22:12,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:22:12,344 INFO L85 PathProgramCache]: Analyzing trace with hash -628521019, now seen corresponding path program 2 times [2022-09-20 21:22:12,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:22:12,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320251554] [2022-09-20 21:22:12,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:12,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:22:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:12,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:22:12,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320251554] [2022-09-20 21:22:12,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320251554] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:22:12,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437270186] [2022-09-20 21:22:12,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:22:12,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:12,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:22:12,440 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) [2022-09-20 21:22:12,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-09-20 21:22:12,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-09-20 21:22:12,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:22:12,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-20 21:22:12,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:22:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:22:12,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 21:22:12,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437270186] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:22:12,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 21:22:12,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2022-09-20 21:22:12,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466333044] [2022-09-20 21:22:12,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:22:12,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 21:22:12,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:22:12,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 21:22:12,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-09-20 21:22:12,660 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 84 [2022-09-20 21:22:12,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 323 flow. Second operand has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:12,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:22:12,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 84 [2022-09-20 21:22:12,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:22:12,818 INFO L130 PetriNetUnfolder]: 69/269 cut-off events. [2022-09-20 21:22:12,818 INFO L131 PetriNetUnfolder]: For 416/422 co-relation queries the response was YES. [2022-09-20 21:22:12,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 720 conditions, 269 events. 69/269 cut-off events. For 416/422 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1047 event pairs, 15 based on Foata normal form. 12/273 useless extension candidates. Maximal degree in co-relation 708. Up to 68 conditions per place. [2022-09-20 21:22:12,821 INFO L137 encePairwiseOnDemand]: 76/84 looper letters, 29 selfloop transitions, 12 changer transitions 0/97 dead transitions. [2022-09-20 21:22:12,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 97 transitions, 456 flow [2022-09-20 21:22:12,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-09-20 21:22:12,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-09-20 21:22:12,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 482 transitions. [2022-09-20 21:22:12,823 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7172619047619048 [2022-09-20 21:22:12,823 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 482 transitions. [2022-09-20 21:22:12,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 482 transitions. [2022-09-20 21:22:12,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:22:12,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 482 transitions. [2022-09-20 21:22:12,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 60.25) internal successors, (482), 8 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:12,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:12,827 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:12,828 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 323 flow. Second operand 8 states and 482 transitions. [2022-09-20 21:22:12,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 97 transitions, 456 flow [2022-09-20 21:22:12,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 97 transitions, 448 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 21:22:12,837 INFO L231 Difference]: Finished difference. Result has 95 places, 91 transitions, 371 flow [2022-09-20 21:22:12,838 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=371, PETRI_PLACES=95, PETRI_TRANSITIONS=91} [2022-09-20 21:22:12,839 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 21 predicate places. [2022-09-20 21:22:12,839 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 91 transitions, 371 flow [2022-09-20 21:22:12,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:12,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:22:12,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:22:12,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-09-20 21:22:13,055 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,SelfDestructingSolverStorable3 [2022-09-20 21:22:13,056 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:22:13,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:22:13,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1629171339, now seen corresponding path program 1 times [2022-09-20 21:22:13,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:22:13,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485956302] [2022-09-20 21:22:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:13,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:22:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:13,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:13,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:22:13,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485956302] [2022-09-20 21:22:13,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485956302] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:22:13,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511305196] [2022-09-20 21:22:13,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:13,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:13,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:22:13,208 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) [2022-09-20 21:22:13,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-09-20 21:22:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:13,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2022-09-20 21:22:13,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:22:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:13,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:22:13,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:13,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511305196] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:22:13,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:22:13,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-09-20 21:22:13,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677795939] [2022-09-20 21:22:13,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:22:13,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-09-20 21:22:13,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:22:13,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-09-20 21:22:13,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-09-20 21:22:13,656 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 84 [2022-09-20 21:22:13,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 91 transitions, 371 flow. Second operand has 12 states, 12 states have (on average 63.083333333333336) internal successors, (757), 12 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:13,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:22:13,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 84 [2022-09-20 21:22:13,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:22:13,971 INFO L130 PetriNetUnfolder]: 185/527 cut-off events. [2022-09-20 21:22:13,971 INFO L131 PetriNetUnfolder]: For 1222/1222 co-relation queries the response was YES. [2022-09-20 21:22:13,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1731 conditions, 527 events. 185/527 cut-off events. For 1222/1222 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2605 event pairs, 17 based on Foata normal form. 20/543 useless extension candidates. Maximal degree in co-relation 1717. Up to 145 conditions per place. [2022-09-20 21:22:13,977 INFO L137 encePairwiseOnDemand]: 75/84 looper letters, 76 selfloop transitions, 48 changer transitions 0/172 dead transitions. [2022-09-20 21:22:13,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 172 transitions, 1138 flow [2022-09-20 21:22:13,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-09-20 21:22:13,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-09-20 21:22:13,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 852 transitions. [2022-09-20 21:22:13,980 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7802197802197802 [2022-09-20 21:22:13,980 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 852 transitions. [2022-09-20 21:22:13,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 852 transitions. [2022-09-20 21:22:13,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:22:13,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 852 transitions. [2022-09-20 21:22:13,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 65.53846153846153) internal successors, (852), 13 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:13,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 84.0) internal successors, (1176), 14 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:13,985 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 84.0) internal successors, (1176), 14 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:13,985 INFO L175 Difference]: Start difference. First operand has 95 places, 91 transitions, 371 flow. Second operand 13 states and 852 transitions. [2022-09-20 21:22:13,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 172 transitions, 1138 flow [2022-09-20 21:22:13,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 172 transitions, 1078 flow, removed 4 selfloop flow, removed 7 redundant places. [2022-09-20 21:22:13,993 INFO L231 Difference]: Finished difference. Result has 112 places, 130 transitions, 861 flow [2022-09-20 21:22:13,993 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=861, PETRI_PLACES=112, PETRI_TRANSITIONS=130} [2022-09-20 21:22:13,994 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 38 predicate places. [2022-09-20 21:22:13,994 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 130 transitions, 861 flow [2022-09-20 21:22:13,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 63.083333333333336) internal successors, (757), 12 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:13,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:22:13,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:22:14,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-09-20 21:22:14,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:14,216 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:22:14,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:22:14,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1750043595, now seen corresponding path program 2 times [2022-09-20 21:22:14,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:22:14,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561793064] [2022-09-20 21:22:14,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:14,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:22:14,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:14,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:14,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:22:14,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561793064] [2022-09-20 21:22:14,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561793064] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:22:14,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852670983] [2022-09-20 21:22:14,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:22:14,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:14,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:22:14,465 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) [2022-09-20 21:22:14,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-09-20 21:22:14,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:22:14,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:22:14,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2022-09-20 21:22:14,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:22:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:14,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:22:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:14,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852670983] provided 1 perfect and 1 imperfect interpolant sequences [2022-09-20 21:22:14,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-09-20 21:22:14,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12, 8] total 16 [2022-09-20 21:22:14,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126850635] [2022-09-20 21:22:14,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:22:14,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-20 21:22:14,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:22:14,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-20 21:22:14,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-09-20 21:22:14,805 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 84 [2022-09-20 21:22:14,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 130 transitions, 861 flow. Second operand has 7 states, 7 states have (on average 58.142857142857146) internal successors, (407), 7 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:14,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:22:14,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 84 [2022-09-20 21:22:14,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:22:14,959 INFO L130 PetriNetUnfolder]: 197/702 cut-off events. [2022-09-20 21:22:14,959 INFO L131 PetriNetUnfolder]: For 3162/3224 co-relation queries the response was YES. [2022-09-20 21:22:14,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2766 conditions, 702 events. 197/702 cut-off events. For 3162/3224 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4192 event pairs, 20 based on Foata normal form. 31/726 useless extension candidates. Maximal degree in co-relation 2743. Up to 187 conditions per place. [2022-09-20 21:22:14,967 INFO L137 encePairwiseOnDemand]: 78/84 looper letters, 79 selfloop transitions, 18 changer transitions 21/180 dead transitions. [2022-09-20 21:22:14,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 180 transitions, 1497 flow [2022-09-20 21:22:14,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-09-20 21:22:14,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-09-20 21:22:14,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 378 transitions. [2022-09-20 21:22:14,969 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.75 [2022-09-20 21:22:14,969 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 378 transitions. [2022-09-20 21:22:14,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 378 transitions. [2022-09-20 21:22:14,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:22:14,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 378 transitions. [2022-09-20 21:22:14,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 63.0) internal successors, (378), 6 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:14,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:14,971 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:14,971 INFO L175 Difference]: Start difference. First operand has 112 places, 130 transitions, 861 flow. Second operand 6 states and 378 transitions. [2022-09-20 21:22:14,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 180 transitions, 1497 flow [2022-09-20 21:22:14,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 180 transitions, 1489 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-09-20 21:22:14,984 INFO L231 Difference]: Finished difference. Result has 121 places, 140 transitions, 1072 flow [2022-09-20 21:22:14,984 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1072, PETRI_PLACES=121, PETRI_TRANSITIONS=140} [2022-09-20 21:22:14,985 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 47 predicate places. [2022-09-20 21:22:14,985 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 140 transitions, 1072 flow [2022-09-20 21:22:14,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 58.142857142857146) internal successors, (407), 7 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:14,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:22:14,986 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:22:15,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-09-20 21:22:15,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:15,208 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:22:15,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:22:15,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1478394585, now seen corresponding path program 3 times [2022-09-20 21:22:15,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:22:15,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743173700] [2022-09-20 21:22:15,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:15,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:22:15,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:15,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:22:15,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743173700] [2022-09-20 21:22:15,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743173700] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:22:15,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589140841] [2022-09-20 21:22:15,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:22:15,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:15,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:22:15,365 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) [2022-09-20 21:22:15,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-09-20 21:22:15,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-09-20 21:22:15,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:22:15,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 21:22:15,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:22:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:15,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:22:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:15,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589140841] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:22:15,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:22:15,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 16 [2022-09-20 21:22:15,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776472233] [2022-09-20 21:22:15,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:22:15,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-09-20 21:22:15,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:22:15,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-09-20 21:22:15,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-09-20 21:22:15,778 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 21:22:15,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 140 transitions, 1072 flow. Second operand has 16 states, 16 states have (on average 64.3125) internal successors, (1029), 16 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:15,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:22:15,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 21:22:15,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:22:16,657 INFO L130 PetriNetUnfolder]: 415/1200 cut-off events. [2022-09-20 21:22:16,657 INFO L131 PetriNetUnfolder]: For 6924/6937 co-relation queries the response was YES. [2022-09-20 21:22:16,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5369 conditions, 1200 events. 415/1200 cut-off events. For 6924/6937 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8130 event pairs, 14 based on Foata normal form. 28/1224 useless extension candidates. Maximal degree in co-relation 5341. Up to 242 conditions per place. [2022-09-20 21:22:16,669 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 81 selfloop transitions, 178 changer transitions 18/332 dead transitions. [2022-09-20 21:22:16,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 332 transitions, 3623 flow [2022-09-20 21:22:16,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-09-20 21:22:16,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-09-20 21:22:16,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2124 transitions. [2022-09-20 21:22:16,676 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7901785714285714 [2022-09-20 21:22:16,676 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2124 transitions. [2022-09-20 21:22:16,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2124 transitions. [2022-09-20 21:22:16,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:22:16,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2124 transitions. [2022-09-20 21:22:16,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 66.375) internal successors, (2124), 32 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:16,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:16,687 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:16,687 INFO L175 Difference]: Start difference. First operand has 121 places, 140 transitions, 1072 flow. Second operand 32 states and 2124 transitions. [2022-09-20 21:22:16,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 332 transitions, 3623 flow [2022-09-20 21:22:16,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 332 transitions, 3619 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-09-20 21:22:16,714 INFO L231 Difference]: Finished difference. Result has 167 places, 260 transitions, 3149 flow [2022-09-20 21:22:16,715 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3149, PETRI_PLACES=167, PETRI_TRANSITIONS=260} [2022-09-20 21:22:16,716 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 93 predicate places. [2022-09-20 21:22:16,716 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 260 transitions, 3149 flow [2022-09-20 21:22:16,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 64.3125) internal successors, (1029), 16 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:16,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:22:16,717 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:22:16,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-09-20 21:22:16,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:16,941 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:22:16,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:22:16,941 INFO L85 PathProgramCache]: Analyzing trace with hash -577994853, now seen corresponding path program 4 times [2022-09-20 21:22:16,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:22:16,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671603514] [2022-09-20 21:22:16,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:16,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:22:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:17,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:22:17,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671603514] [2022-09-20 21:22:17,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671603514] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:22:17,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177349420] [2022-09-20 21:22:17,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:22:17,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:17,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:22:17,077 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) [2022-09-20 21:22:17,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-09-20 21:22:17,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:22:17,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:22:17,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 21:22:17,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:22:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:17,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:22:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:17,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177349420] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:22:17,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:22:17,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-09-20 21:22:17,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124886972] [2022-09-20 21:22:17,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:22:17,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-20 21:22:17,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:22:17,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-20 21:22:17,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-09-20 21:22:17,540 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 21:22:17,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 260 transitions, 3149 flow. Second operand has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:17,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:22:17,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 21:22:17,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:22:18,340 INFO L130 PetriNetUnfolder]: 501/1369 cut-off events. [2022-09-20 21:22:18,340 INFO L131 PetriNetUnfolder]: For 15393/15406 co-relation queries the response was YES. [2022-09-20 21:22:18,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8332 conditions, 1369 events. 501/1369 cut-off events. For 15393/15406 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8945 event pairs, 22 based on Foata normal form. 12/1378 useless extension candidates. Maximal degree in co-relation 8286. Up to 328 conditions per place. [2022-09-20 21:22:18,361 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 117 selfloop transitions, 228 changer transitions 5/405 dead transitions. [2022-09-20 21:22:18,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 405 transitions, 6014 flow [2022-09-20 21:22:18,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-09-20 21:22:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-09-20 21:22:18,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1451 transitions. [2022-09-20 21:22:18,366 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7851731601731602 [2022-09-20 21:22:18,366 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1451 transitions. [2022-09-20 21:22:18,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1451 transitions. [2022-09-20 21:22:18,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:22:18,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1451 transitions. [2022-09-20 21:22:18,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.95454545454545) internal successors, (1451), 22 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:18,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:18,374 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:18,374 INFO L175 Difference]: Start difference. First operand has 167 places, 260 transitions, 3149 flow. Second operand 22 states and 1451 transitions. [2022-09-20 21:22:18,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 405 transitions, 6014 flow [2022-09-20 21:22:18,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 405 transitions, 5788 flow, removed 112 selfloop flow, removed 1 redundant places. [2022-09-20 21:22:18,446 INFO L231 Difference]: Finished difference. Result has 198 places, 360 transitions, 5500 flow [2022-09-20 21:22:18,446 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=2993, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5500, PETRI_PLACES=198, PETRI_TRANSITIONS=360} [2022-09-20 21:22:18,447 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 124 predicate places. [2022-09-20 21:22:18,447 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 360 transitions, 5500 flow [2022-09-20 21:22:18,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:18,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:22:18,448 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:22:18,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-09-20 21:22:18,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:18,671 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:22:18,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:22:18,671 INFO L85 PathProgramCache]: Analyzing trace with hash 841730425, now seen corresponding path program 5 times [2022-09-20 21:22:18,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:22:18,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653600093] [2022-09-20 21:22:18,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:18,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:22:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:18,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:18,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:22:18,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653600093] [2022-09-20 21:22:18,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653600093] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:22:18,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123856175] [2022-09-20 21:22:18,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 21:22:18,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:18,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:22:18,814 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) [2022-09-20 21:22:18,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-09-20 21:22:18,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:22:18,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:22:18,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 11 conjunts are in the unsatisfiable core [2022-09-20 21:22:18,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:22:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:19,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:22:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:19,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123856175] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:22:19,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:22:19,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 22 [2022-09-20 21:22:19,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338978175] [2022-09-20 21:22:19,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:22:19,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-09-20 21:22:19,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:22:19,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-09-20 21:22:19,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-09-20 21:22:19,370 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 21:22:19,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 360 transitions, 5500 flow. Second operand has 22 states, 22 states have (on average 64.13636363636364) internal successors, (1411), 22 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:19,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:22:19,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 21:22:19,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:22:23,018 INFO L130 PetriNetUnfolder]: 639/1941 cut-off events. [2022-09-20 21:22:23,018 INFO L131 PetriNetUnfolder]: For 28845/28864 co-relation queries the response was YES. [2022-09-20 21:22:23,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12521 conditions, 1941 events. 639/1941 cut-off events. For 28845/28864 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14799 event pairs, 16 based on Foata normal form. 36/1964 useless extension candidates. Maximal degree in co-relation 12464. Up to 407 conditions per place. [2022-09-20 21:22:23,085 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 129 selfloop transitions, 492 changer transitions 2/678 dead transitions. [2022-09-20 21:22:23,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 678 transitions, 11996 flow [2022-09-20 21:22:23,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-09-20 21:22:23,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-09-20 21:22:23,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4684 transitions. [2022-09-20 21:22:23,095 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7744708994708994 [2022-09-20 21:22:23,095 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4684 transitions. [2022-09-20 21:22:23,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4684 transitions. [2022-09-20 21:22:23,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:22:23,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4684 transitions. [2022-09-20 21:22:23,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 65.05555555555556) internal successors, (4684), 72 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:23,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 84.0) internal successors, (6132), 73 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:23,122 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 84.0) internal successors, (6132), 73 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:23,123 INFO L175 Difference]: Start difference. First operand has 198 places, 360 transitions, 5500 flow. Second operand 72 states and 4684 transitions. [2022-09-20 21:22:23,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 678 transitions, 11996 flow [2022-09-20 21:22:23,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 678 transitions, 11343 flow, removed 311 selfloop flow, removed 4 redundant places. [2022-09-20 21:22:23,279 INFO L231 Difference]: Finished difference. Result has 267 places, 610 transitions, 10628 flow [2022-09-20 21:22:23,280 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=5233, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=10628, PETRI_PLACES=267, PETRI_TRANSITIONS=610} [2022-09-20 21:22:23,281 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 193 predicate places. [2022-09-20 21:22:23,281 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 610 transitions, 10628 flow [2022-09-20 21:22:23,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 64.13636363636364) internal successors, (1411), 22 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:23,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:22:23,282 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:22:23,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-09-20 21:22:23,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:23,495 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:22:23,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:22:23,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1113448201, now seen corresponding path program 6 times [2022-09-20 21:22:23,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:22:23,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291325360] [2022-09-20 21:22:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:23,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:22:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:23,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:22:23,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291325360] [2022-09-20 21:22:23,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291325360] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:22:23,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088708406] [2022-09-20 21:22:23,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 21:22:23,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:23,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:22:23,671 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:22:23,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-09-20 21:22:23,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-09-20 21:22:23,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:22:23,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 21:22:23,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:22:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:23,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:22:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:24,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088708406] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:22:24,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:22:24,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-09-20 21:22:24,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413157179] [2022-09-20 21:22:24,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:22:24,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-20 21:22:24,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:22:24,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-20 21:22:24,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-09-20 21:22:24,154 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 21:22:24,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 610 transitions, 10628 flow. Second operand has 18 states, 18 states have (on average 64.11111111111111) internal successors, (1154), 18 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:24,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:22:24,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 21:22:24,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:22:26,145 INFO L130 PetriNetUnfolder]: 805/2313 cut-off events. [2022-09-20 21:22:26,145 INFO L131 PetriNetUnfolder]: For 31410/31433 co-relation queries the response was YES. [2022-09-20 21:22:26,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15909 conditions, 2313 events. 805/2313 cut-off events. For 31410/31433 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18107 event pairs, 17 based on Foata normal form. 20/2324 useless extension candidates. Maximal degree in co-relation 15847. Up to 503 conditions per place. [2022-09-20 21:22:26,193 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 212 selfloop transitions, 564 changer transitions 6/837 dead transitions. [2022-09-20 21:22:26,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 837 transitions, 16138 flow [2022-09-20 21:22:26,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-09-20 21:22:26,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-09-20 21:22:26,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3157 transitions. [2022-09-20 21:22:26,198 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7829861111111112 [2022-09-20 21:22:26,198 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3157 transitions. [2022-09-20 21:22:26,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3157 transitions. [2022-09-20 21:22:26,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:22:26,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3157 transitions. [2022-09-20 21:22:26,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 65.77083333333333) internal successors, (3157), 48 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:26,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:26,273 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:26,274 INFO L175 Difference]: Start difference. First operand has 267 places, 610 transitions, 10628 flow. Second operand 48 states and 3157 transitions. [2022-09-20 21:22:26,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 837 transitions, 16138 flow [2022-09-20 21:22:26,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 837 transitions, 14363 flow, removed 683 selfloop flow, removed 17 redundant places. [2022-09-20 21:22:26,492 INFO L231 Difference]: Finished difference. Result has 311 places, 768 transitions, 14135 flow [2022-09-20 21:22:26,492 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=9346, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=14135, PETRI_PLACES=311, PETRI_TRANSITIONS=768} [2022-09-20 21:22:26,493 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 237 predicate places. [2022-09-20 21:22:26,493 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 768 transitions, 14135 flow [2022-09-20 21:22:26,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.11111111111111) internal successors, (1154), 18 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:26,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:22:26,494 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:22:26,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-09-20 21:22:26,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-09-20 21:22:26,696 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:22:26,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:22:26,696 INFO L85 PathProgramCache]: Analyzing trace with hash -629797127, now seen corresponding path program 7 times [2022-09-20 21:22:26,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:22:26,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729545055] [2022-09-20 21:22:26,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:26,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:22:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:26,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:26,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:22:26,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729545055] [2022-09-20 21:22:26,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729545055] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:22:26,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007273979] [2022-09-20 21:22:26,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 21:22:26,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:26,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:22:26,948 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:22:26,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-09-20 21:22:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:27,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 21:22:27,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:22:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:27,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:22:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:27,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007273979] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:22:27,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:22:27,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-09-20 21:22:27,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096899530] [2022-09-20 21:22:27,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:22:27,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-09-20 21:22:27,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:22:27,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-09-20 21:22:27,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-09-20 21:22:27,536 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 21:22:27,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 768 transitions, 14135 flow. Second operand has 19 states, 19 states have (on average 64.52631578947368) internal successors, (1226), 19 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:27,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:22:27,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 21:22:27,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:22:30,230 INFO L130 PetriNetUnfolder]: 1289/3874 cut-off events. [2022-09-20 21:22:30,230 INFO L131 PetriNetUnfolder]: For 43821/43853 co-relation queries the response was YES. [2022-09-20 21:22:30,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24813 conditions, 3874 events. 1289/3874 cut-off events. For 43821/43853 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 34734 event pairs, 57 based on Foata normal form. 57/3914 useless extension candidates. Maximal degree in co-relation 24742. Up to 735 conditions per place. [2022-09-20 21:22:30,289 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 333 selfloop transitions, 941 changer transitions 1/1330 dead transitions. [2022-09-20 21:22:30,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1330 transitions, 26573 flow [2022-09-20 21:22:30,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-09-20 21:22:30,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-09-20 21:22:30,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3187 transitions. [2022-09-20 21:22:30,345 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7904265873015873 [2022-09-20 21:22:30,345 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3187 transitions. [2022-09-20 21:22:30,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3187 transitions. [2022-09-20 21:22:30,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:22:30,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3187 transitions. [2022-09-20 21:22:30,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 66.39583333333333) internal successors, (3187), 48 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:30,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:30,356 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:30,356 INFO L175 Difference]: Start difference. First operand has 311 places, 768 transitions, 14135 flow. Second operand 48 states and 3187 transitions. [2022-09-20 21:22:30,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1330 transitions, 26573 flow [2022-09-20 21:22:30,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 1330 transitions, 25861 flow, removed 189 selfloop flow, removed 15 redundant places. [2022-09-20 21:22:30,705 INFO L231 Difference]: Finished difference. Result has 361 places, 1202 transitions, 25652 flow [2022-09-20 21:22:30,706 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=13753, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=551, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=25652, PETRI_PLACES=361, PETRI_TRANSITIONS=1202} [2022-09-20 21:22:30,706 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 287 predicate places. [2022-09-20 21:22:30,707 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 1202 transitions, 25652 flow [2022-09-20 21:22:30,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.52631578947368) internal successors, (1226), 19 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:30,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:22:30,707 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:22:30,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-09-20 21:22:30,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:30,924 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:22:30,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:22:30,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1882238225, now seen corresponding path program 8 times [2022-09-20 21:22:30,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:22:30,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680374508] [2022-09-20 21:22:30,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:30,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:22:30,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:31,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:31,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:22:31,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680374508] [2022-09-20 21:22:31,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680374508] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:22:31,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890504574] [2022-09-20 21:22:31,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:22:31,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:31,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:22:31,100 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:22:31,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-09-20 21:22:31,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:22:31,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:22:31,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 21:22:31,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:22:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:31,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:22:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:31,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890504574] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:22:31,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:22:31,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2022-09-20 21:22:31,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893567486] [2022-09-20 21:22:31,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:22:31,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-09-20 21:22:31,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:22:31,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-09-20 21:22:31,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-09-20 21:22:31,647 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 21:22:31,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 1202 transitions, 25652 flow. Second operand has 21 states, 21 states have (on average 64.42857142857143) internal successors, (1353), 21 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:31,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:22:31,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 21:22:31,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:22:36,397 INFO L130 PetriNetUnfolder]: 1647/5326 cut-off events. [2022-09-20 21:22:36,397 INFO L131 PetriNetUnfolder]: For 68523/68550 co-relation queries the response was YES. [2022-09-20 21:22:36,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35926 conditions, 5326 events. 1647/5326 cut-off events. For 68523/68550 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 53131 event pairs, 58 based on Foata normal form. 51/5355 useless extension candidates. Maximal degree in co-relation 35840. Up to 888 conditions per place. [2022-09-20 21:22:36,475 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 366 selfloop transitions, 1255 changer transitions 5/1681 dead transitions. [2022-09-20 21:22:36,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1681 transitions, 38006 flow [2022-09-20 21:22:36,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-09-20 21:22:36,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-09-20 21:22:36,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3237 transitions. [2022-09-20 21:22:36,480 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7864431486880467 [2022-09-20 21:22:36,481 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3237 transitions. [2022-09-20 21:22:36,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3237 transitions. [2022-09-20 21:22:36,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:22:36,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3237 transitions. [2022-09-20 21:22:36,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 66.06122448979592) internal successors, (3237), 49 states have internal predecessors, (3237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:36,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:36,493 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:36,493 INFO L175 Difference]: Start difference. First operand has 361 places, 1202 transitions, 25652 flow. Second operand 49 states and 3237 transitions. [2022-09-20 21:22:36,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1681 transitions, 38006 flow [2022-09-20 21:22:37,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1681 transitions, 37616 flow, removed 159 selfloop flow, removed 6 redundant places. [2022-09-20 21:22:37,375 INFO L231 Difference]: Finished difference. Result has 421 places, 1553 transitions, 37438 flow [2022-09-20 21:22:37,377 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=25319, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=948, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=37438, PETRI_PLACES=421, PETRI_TRANSITIONS=1553} [2022-09-20 21:22:37,377 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 347 predicate places. [2022-09-20 21:22:37,377 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 1553 transitions, 37438 flow [2022-09-20 21:22:37,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.42857142857143) internal successors, (1353), 21 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:37,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:22:37,378 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:22:37,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-09-20 21:22:37,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-09-20 21:22:37,586 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:22:37,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:22:37,586 INFO L85 PathProgramCache]: Analyzing trace with hash 288105781, now seen corresponding path program 9 times [2022-09-20 21:22:37,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:22:37,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985237869] [2022-09-20 21:22:37,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:37,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:22:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:37,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:22:37,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985237869] [2022-09-20 21:22:37,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985237869] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:22:37,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135600550] [2022-09-20 21:22:37,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:22:37,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:37,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:22:37,731 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:22:37,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-09-20 21:22:37,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-09-20 21:22:37,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:22:37,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 21:22:37,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:22:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:37,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:22:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:38,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135600550] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:22:38,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:22:38,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 19 [2022-09-20 21:22:38,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472762564] [2022-09-20 21:22:38,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:22:38,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-09-20 21:22:38,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:22:38,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-09-20 21:22:38,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-09-20 21:22:38,202 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 21:22:38,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 1553 transitions, 37438 flow. Second operand has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:38,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:22:38,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 21:22:38,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:22:42,311 INFO L130 PetriNetUnfolder]: 1993/6224 cut-off events. [2022-09-20 21:22:42,311 INFO L131 PetriNetUnfolder]: For 119571/119607 co-relation queries the response was YES. [2022-09-20 21:22:42,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49198 conditions, 6224 events. 1993/6224 cut-off events. For 119571/119607 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 62886 event pairs, 55 based on Foata normal form. 32/6246 useless extension candidates. Maximal degree in co-relation 49095. Up to 1192 conditions per place. [2022-09-20 21:22:42,409 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 342 selfloop transitions, 1642 changer transitions 7/2046 dead transitions. [2022-09-20 21:22:42,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 2046 transitions, 53676 flow [2022-09-20 21:22:42,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-09-20 21:22:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-09-20 21:22:42,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3140 transitions. [2022-09-20 21:22:42,415 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7787698412698413 [2022-09-20 21:22:42,416 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3140 transitions. [2022-09-20 21:22:42,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3140 transitions. [2022-09-20 21:22:42,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:22:42,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3140 transitions. [2022-09-20 21:22:42,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 65.41666666666667) internal successors, (3140), 48 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:42,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:42,427 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:42,428 INFO L175 Difference]: Start difference. First operand has 421 places, 1553 transitions, 37438 flow. Second operand 48 states and 3140 transitions. [2022-09-20 21:22:42,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 2046 transitions, 53676 flow [2022-09-20 21:22:43,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 2046 transitions, 52982 flow, removed 154 selfloop flow, removed 15 redundant places. [2022-09-20 21:22:43,960 INFO L231 Difference]: Finished difference. Result has 461 places, 2018 transitions, 53694 flow [2022-09-20 21:22:43,962 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=36828, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=53694, PETRI_PLACES=461, PETRI_TRANSITIONS=2018} [2022-09-20 21:22:43,963 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 387 predicate places. [2022-09-20 21:22:43,963 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 2018 transitions, 53694 flow [2022-09-20 21:22:43,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.15789473684211) internal successors, (1219), 19 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:43,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:22:43,964 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:22:43,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-09-20 21:22:44,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-09-20 21:22:44,180 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:22:44,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:22:44,180 INFO L85 PathProgramCache]: Analyzing trace with hash 796150931, now seen corresponding path program 10 times [2022-09-20 21:22:44,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:22:44,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318855104] [2022-09-20 21:22:44,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:44,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:22:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:44,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:44,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:22:44,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318855104] [2022-09-20 21:22:44,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318855104] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:22:44,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878514530] [2022-09-20 21:22:44,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:22:44,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:44,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:22:44,338 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:22:44,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-09-20 21:22:44,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:22:44,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:22:44,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 21:22:44,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:22:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:44,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:22:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:44,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878514530] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:22:44,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:22:44,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-09-20 21:22:44,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922297253] [2022-09-20 21:22:44,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:22:44,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-09-20 21:22:44,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:22:44,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-09-20 21:22:44,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-09-20 21:22:44,692 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 21:22:44,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 2018 transitions, 53694 flow. Second operand has 17 states, 17 states have (on average 64.0) internal successors, (1088), 17 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:44,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:22:44,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 21:22:44,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:22:48,924 INFO L130 PetriNetUnfolder]: 2085/6369 cut-off events. [2022-09-20 21:22:48,925 INFO L131 PetriNetUnfolder]: For 139394/139426 co-relation queries the response was YES. [2022-09-20 21:22:48,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55692 conditions, 6369 events. 2085/6369 cut-off events. For 139394/139426 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 63923 event pairs, 61 based on Foata normal form. 28/6384 useless extension candidates. Maximal degree in co-relation 55585. Up to 1284 conditions per place. [2022-09-20 21:22:49,042 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 688 selfloop transitions, 1390 changer transitions 3/2136 dead transitions. [2022-09-20 21:22:49,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 2136 transitions, 61193 flow [2022-09-20 21:22:49,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-09-20 21:22:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-09-20 21:22:49,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2170 transitions. [2022-09-20 21:22:49,046 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7828282828282829 [2022-09-20 21:22:49,046 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2170 transitions. [2022-09-20 21:22:49,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2170 transitions. [2022-09-20 21:22:49,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:22:49,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2170 transitions. [2022-09-20 21:22:49,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 65.75757575757575) internal successors, (2170), 33 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:49,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 84.0) internal successors, (2856), 34 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:49,054 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 84.0) internal successors, (2856), 34 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:49,054 INFO L175 Difference]: Start difference. First operand has 461 places, 2018 transitions, 53694 flow. Second operand 33 states and 2170 transitions. [2022-09-20 21:22:49,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 2136 transitions, 61193 flow [2022-09-20 21:22:50,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 2136 transitions, 60725 flow, removed 78 selfloop flow, removed 20 redundant places. [2022-09-20 21:22:51,039 INFO L231 Difference]: Finished difference. Result has 478 places, 2113 transitions, 60700 flow [2022-09-20 21:22:51,041 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=53052, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2006, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=60700, PETRI_PLACES=478, PETRI_TRANSITIONS=2113} [2022-09-20 21:22:51,041 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 404 predicate places. [2022-09-20 21:22:51,041 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 2113 transitions, 60700 flow [2022-09-20 21:22:51,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.0) internal successors, (1088), 17 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:51,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:22:51,042 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:22:51,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-09-20 21:22:51,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-09-20 21:22:51,267 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:22:51,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:22:51,268 INFO L85 PathProgramCache]: Analyzing trace with hash 45309753, now seen corresponding path program 11 times [2022-09-20 21:22:51,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:22:51,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651284434] [2022-09-20 21:22:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:22:51,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:22:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:22:51,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:51,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:22:51,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651284434] [2022-09-20 21:22:51,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651284434] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:22:51,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556915834] [2022-09-20 21:22:51,377 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 21:22:51,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:22:51,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:22:51,380 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:22:51,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-09-20 21:22:51,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-09-20 21:22:51,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:22:51,440 WARN L261 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 15 conjunts are in the unsatisfiable core [2022-09-20 21:22:51,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:22:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:51,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:22:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:22:51,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556915834] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:22:51,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:22:51,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10] total 21 [2022-09-20 21:22:51,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067661460] [2022-09-20 21:22:51,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:22:51,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-09-20 21:22:51,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:22:51,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-09-20 21:22:51,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-09-20 21:22:51,978 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 84 [2022-09-20 21:22:51,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 2113 transitions, 60700 flow. Second operand has 21 states, 21 states have (on average 59.19047619047619) internal successors, (1243), 21 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:51,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:22:51,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 84 [2022-09-20 21:22:51,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:22:58,231 INFO L130 PetriNetUnfolder]: 2450/7228 cut-off events. [2022-09-20 21:22:58,232 INFO L131 PetriNetUnfolder]: For 183276/183276 co-relation queries the response was YES. [2022-09-20 21:22:58,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68919 conditions, 7228 events. 2450/7228 cut-off events. For 183276/183276 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 72798 event pairs, 68 based on Foata normal form. 1/7221 useless extension candidates. Maximal degree in co-relation 68804. Up to 1501 conditions per place. [2022-09-20 21:22:58,565 INFO L137 encePairwiseOnDemand]: 70/84 looper letters, 760 selfloop transitions, 1613 changer transitions 5/2423 dead transitions. [2022-09-20 21:22:58,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 2423 transitions, 73251 flow [2022-09-20 21:22:58,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-09-20 21:22:58,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-09-20 21:22:58,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2793 transitions. [2022-09-20 21:22:58,569 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7228260869565217 [2022-09-20 21:22:58,569 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2793 transitions. [2022-09-20 21:22:58,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2793 transitions. [2022-09-20 21:22:58,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:22:58,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2793 transitions. [2022-09-20 21:22:58,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 60.71739130434783) internal successors, (2793), 46 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:58,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:58,584 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:22:58,584 INFO L175 Difference]: Start difference. First operand has 478 places, 2113 transitions, 60700 flow. Second operand 46 states and 2793 transitions. [2022-09-20 21:22:58,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 2423 transitions, 73251 flow [2022-09-20 21:23:00,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 2423 transitions, 71793 flow, removed 43 selfloop flow, removed 17 redundant places. [2022-09-20 21:23:01,042 INFO L231 Difference]: Finished difference. Result has 518 places, 2365 transitions, 72133 flow [2022-09-20 21:23:01,044 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=59455, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1372, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=72133, PETRI_PLACES=518, PETRI_TRANSITIONS=2365} [2022-09-20 21:23:01,044 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 444 predicate places. [2022-09-20 21:23:01,045 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 2365 transitions, 72133 flow [2022-09-20 21:23:01,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 59.19047619047619) internal successors, (1243), 21 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:23:01,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:23:01,045 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:23:01,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-09-20 21:23:01,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-09-20 21:23:01,270 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:23:01,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:23:01,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1918841427, now seen corresponding path program 12 times [2022-09-20 21:23:01,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:23:01,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910460721] [2022-09-20 21:23:01,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:23:01,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:23:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:23:01,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:01,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:23:01,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910460721] [2022-09-20 21:23:01,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910460721] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:23:01,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49292433] [2022-09-20 21:23:01,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 21:23:01,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:23:01,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:23:01,415 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:23:01,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-09-20 21:23:01,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-09-20 21:23:01,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:23:01,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 21:23:01,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:23:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:01,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:23:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:01,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49292433] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:23:01,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:23:01,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-09-20 21:23:01,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696515879] [2022-09-20 21:23:01,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:23:01,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-20 21:23:01,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:23:01,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-20 21:23:01,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-09-20 21:23:01,899 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 21:23:01,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 2365 transitions, 72133 flow. Second operand has 18 states, 18 states have (on average 64.11111111111111) internal successors, (1154), 18 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:23:01,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:23:01,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 21:23:01,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:23:10,468 INFO L130 PetriNetUnfolder]: 2551/7771 cut-off events. [2022-09-20 21:23:10,468 INFO L131 PetriNetUnfolder]: For 220805/220816 co-relation queries the response was YES. [2022-09-20 21:23:10,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79103 conditions, 7771 events. 2551/7771 cut-off events. For 220805/220816 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 81203 event pairs, 150 based on Foata normal form. 9/7767 useless extension candidates. Maximal degree in co-relation 78972. Up to 1812 conditions per place. [2022-09-20 21:23:10,626 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 661 selfloop transitions, 2069 changer transitions 23/2817 dead transitions. [2022-09-20 21:23:10,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 2817 transitions, 90453 flow [2022-09-20 21:23:10,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-09-20 21:23:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-09-20 21:23:10,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3809 transitions. [2022-09-20 21:23:10,631 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7818144499178982 [2022-09-20 21:23:10,631 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3809 transitions. [2022-09-20 21:23:10,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3809 transitions. [2022-09-20 21:23:10,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:23:10,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3809 transitions. [2022-09-20 21:23:10,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 65.67241379310344) internal successors, (3809), 58 states have internal predecessors, (3809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:23:10,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 84.0) internal successors, (4956), 59 states have internal predecessors, (4956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:23:10,644 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 84.0) internal successors, (4956), 59 states have internal predecessors, (4956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:23:10,644 INFO L175 Difference]: Start difference. First operand has 518 places, 2365 transitions, 72133 flow. Second operand 58 states and 3809 transitions. [2022-09-20 21:23:10,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 2817 transitions, 90453 flow [2022-09-20 21:23:13,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 2817 transitions, 89603 flow, removed 180 selfloop flow, removed 11 redundant places. [2022-09-20 21:23:13,886 INFO L231 Difference]: Finished difference. Result has 580 places, 2763 transitions, 91040 flow [2022-09-20 21:23:13,888 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=71351, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1709, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=91040, PETRI_PLACES=580, PETRI_TRANSITIONS=2763} [2022-09-20 21:23:13,888 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 506 predicate places. [2022-09-20 21:23:13,888 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 2763 transitions, 91040 flow [2022-09-20 21:23:13,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.11111111111111) internal successors, (1154), 18 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:23:13,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:23:13,889 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:23:13,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-09-20 21:23:14,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:23:14,103 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:23:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:23:14,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1259090025, now seen corresponding path program 13 times [2022-09-20 21:23:14,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:23:14,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738910508] [2022-09-20 21:23:14,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:23:14,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:23:14,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:23:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:14,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:23:14,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738910508] [2022-09-20 21:23:14,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738910508] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:23:14,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571056387] [2022-09-20 21:23:14,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 21:23:14,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:23:14,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:23:14,256 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:23:14,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-09-20 21:23:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:23:14,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 21:23:14,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:23:14,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:14,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:23:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:14,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571056387] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:23:14,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:23:14,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-09-20 21:23:14,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121489636] [2022-09-20 21:23:14,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:23:14,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-20 21:23:14,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:23:14,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-20 21:23:14,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-09-20 21:23:14,648 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 21:23:14,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 2763 transitions, 91040 flow. Second operand has 18 states, 18 states have (on average 63.94444444444444) internal successors, (1151), 18 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:23:14,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:23:14,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 21:23:14,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:23:22,393 INFO L130 PetriNetUnfolder]: 2685/8062 cut-off events. [2022-09-20 21:23:22,393 INFO L131 PetriNetUnfolder]: For 267850/267878 co-relation queries the response was YES. [2022-09-20 21:23:22,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88902 conditions, 8062 events. 2685/8062 cut-off events. For 267850/267878 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 83856 event pairs, 148 based on Foata normal form. 18/8063 useless extension candidates. Maximal degree in co-relation 88753. Up to 1604 conditions per place. [2022-09-20 21:23:22,662 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 728 selfloop transitions, 2228 changer transitions 6/3026 dead transitions. [2022-09-20 21:23:22,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 3026 transitions, 104611 flow [2022-09-20 21:23:22,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-09-20 21:23:22,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-09-20 21:23:22,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2501 transitions. [2022-09-20 21:23:22,665 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7835213032581454 [2022-09-20 21:23:22,665 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2501 transitions. [2022-09-20 21:23:22,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2501 transitions. [2022-09-20 21:23:22,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:23:22,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2501 transitions. [2022-09-20 21:23:22,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 65.8157894736842) internal successors, (2501), 38 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:23:22,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 84.0) internal successors, (3276), 39 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:23:22,672 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 84.0) internal successors, (3276), 39 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:23:22,672 INFO L175 Difference]: Start difference. First operand has 580 places, 2763 transitions, 91040 flow. Second operand 38 states and 2501 transitions. [2022-09-20 21:23:22,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 3026 transitions, 104611 flow [2022-09-20 21:23:27,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 3026 transitions, 103673 flow, removed 161 selfloop flow, removed 14 redundant places. [2022-09-20 21:23:27,168 INFO L231 Difference]: Finished difference. Result has 611 places, 2984 transitions, 105250 flow [2022-09-20 21:23:27,170 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=90127, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2005, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=105250, PETRI_PLACES=611, PETRI_TRANSITIONS=2984} [2022-09-20 21:23:27,171 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 537 predicate places. [2022-09-20 21:23:27,171 INFO L495 AbstractCegarLoop]: Abstraction has has 611 places, 2984 transitions, 105250 flow [2022-09-20 21:23:27,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.94444444444444) internal successors, (1151), 18 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:23:27,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:23:27,171 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:23:27,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-09-20 21:23:27,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-09-20 21:23:27,372 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:23:27,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:23:27,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1254850921, now seen corresponding path program 14 times [2022-09-20 21:23:27,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:23:27,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171339561] [2022-09-20 21:23:27,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:23:27,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:23:27,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:23:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:27,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:23:27,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171339561] [2022-09-20 21:23:27,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171339561] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:23:27,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553730612] [2022-09-20 21:23:27,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:23:27,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:23:27,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:23:27,534 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:23:27,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-09-20 21:23:27,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:23:27,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:23:27,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 21:23:27,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:23:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:27,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:23:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:27,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553730612] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:23:27,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:23:27,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-09-20 21:23:27,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924357616] [2022-09-20 21:23:27,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:23:27,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-20 21:23:27,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:23:27,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-20 21:23:27,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-09-20 21:23:27,973 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 21:23:27,973 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 2984 transitions, 105250 flow. Second operand has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:23:27,973 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:23:27,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 21:23:27,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:23:36,530 INFO L130 PetriNetUnfolder]: 2762/8342 cut-off events. [2022-09-20 21:23:36,530 INFO L131 PetriNetUnfolder]: For 323917/323936 co-relation queries the response was YES. [2022-09-20 21:23:36,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97332 conditions, 8342 events. 2762/8342 cut-off events. For 323917/323936 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 87446 event pairs, 65 based on Foata normal form. 9/8333 useless extension candidates. Maximal degree in co-relation 97176. Up to 1606 conditions per place. [2022-09-20 21:23:36,695 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 428 selfloop transitions, 2602 changer transitions 5/3099 dead transitions. [2022-09-20 21:23:36,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 644 places, 3099 transitions, 114572 flow [2022-09-20 21:23:36,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-09-20 21:23:36,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-09-20 21:23:36,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2634 transitions. [2022-09-20 21:23:36,697 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7839285714285714 [2022-09-20 21:23:36,697 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2634 transitions. [2022-09-20 21:23:36,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2634 transitions. [2022-09-20 21:23:36,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:23:36,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2634 transitions. [2022-09-20 21:23:36,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 65.85) internal successors, (2634), 40 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:23:36,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:23:36,705 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:23:36,705 INFO L175 Difference]: Start difference. First operand has 611 places, 2984 transitions, 105250 flow. Second operand 40 states and 2634 transitions. [2022-09-20 21:23:36,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 644 places, 3099 transitions, 114572 flow [2022-09-20 21:23:41,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 623 places, 3099 transitions, 112483 flow, removed 213 selfloop flow, removed 21 redundant places. [2022-09-20 21:23:41,892 INFO L231 Difference]: Finished difference. Result has 632 places, 3052 transitions, 114278 flow [2022-09-20 21:23:41,895 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=102924, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2975, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2522, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=114278, PETRI_PLACES=632, PETRI_TRANSITIONS=3052} [2022-09-20 21:23:41,895 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 558 predicate places. [2022-09-20 21:23:41,895 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 3052 transitions, 114278 flow [2022-09-20 21:23:41,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:23:41,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:23:41,896 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:23:41,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-09-20 21:23:42,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-09-20 21:23:42,096 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:23:42,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:23:42,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1174508161, now seen corresponding path program 15 times [2022-09-20 21:23:42,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:23:42,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045216763] [2022-09-20 21:23:42,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:23:42,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:23:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:23:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:42,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:23:42,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045216763] [2022-09-20 21:23:42,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045216763] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:23:42,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898723187] [2022-09-20 21:23:42,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:23:42,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:23:42,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:23:42,271 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:23:42,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-09-20 21:23:42,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-09-20 21:23:42,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:23:42,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 21:23:42,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:23:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:42,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:23:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:23:42,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898723187] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:23:42,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:23:42,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-09-20 21:23:42,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805425083] [2022-09-20 21:23:42,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:23:42,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-09-20 21:23:42,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:23:42,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-09-20 21:23:42,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-09-20 21:23:42,863 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 21:23:42,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 3052 transitions, 114278 flow. Second operand has 20 states, 20 states have (on average 64.45) internal successors, (1289), 20 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:23:42,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:23:42,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 21:23:42,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:23:56,712 INFO L130 PetriNetUnfolder]: 3851/11964 cut-off events. [2022-09-20 21:23:56,712 INFO L131 PetriNetUnfolder]: For 506363/506383 co-relation queries the response was YES. [2022-09-20 21:23:56,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144246 conditions, 11964 events. 3851/11964 cut-off events. For 506363/506383 co-relation queries the response was YES. Maximal size of possible extension queue 831. Compared 136159 event pairs, 87 based on Foata normal form. 64/12010 useless extension candidates. Maximal degree in co-relation 144083. Up to 1957 conditions per place. [2022-09-20 21:23:56,979 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 1196 selfloop transitions, 3077 changer transitions 3/4340 dead transitions. [2022-09-20 21:23:56,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 679 places, 4340 transitions, 170584 flow [2022-09-20 21:23:56,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-09-20 21:23:56,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-09-20 21:23:56,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3401 transitions. [2022-09-20 21:23:56,982 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7938842203548085 [2022-09-20 21:23:56,982 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3401 transitions. [2022-09-20 21:23:56,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3401 transitions. [2022-09-20 21:23:56,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:23:56,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3401 transitions. [2022-09-20 21:23:56,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 66.68627450980392) internal successors, (3401), 51 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:23:56,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 84.0) internal successors, (4368), 52 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:23:56,991 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 84.0) internal successors, (4368), 52 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:23:56,991 INFO L175 Difference]: Start difference. First operand has 632 places, 3052 transitions, 114278 flow. Second operand 51 states and 3401 transitions. [2022-09-20 21:23:56,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 679 places, 4340 transitions, 170584 flow [2022-09-20 21:24:06,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 662 places, 4340 transitions, 168959 flow, removed 190 selfloop flow, removed 17 redundant places. [2022-09-20 21:24:06,617 INFO L231 Difference]: Finished difference. Result has 691 places, 4052 transitions, 165134 flow [2022-09-20 21:24:06,620 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=113104, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3052, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=711, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=165134, PETRI_PLACES=691, PETRI_TRANSITIONS=4052} [2022-09-20 21:24:06,620 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 617 predicate places. [2022-09-20 21:24:06,621 INFO L495 AbstractCegarLoop]: Abstraction has has 691 places, 4052 transitions, 165134 flow [2022-09-20 21:24:06,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.45) internal successors, (1289), 20 states have internal predecessors, (1289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:24:06,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:24:06,621 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:24:06,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-09-20 21:24:06,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:24:06,822 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:24:06,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:24:06,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1654321095, now seen corresponding path program 16 times [2022-09-20 21:24:06,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:24:06,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934123917] [2022-09-20 21:24:06,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:24:06,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:24:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:24:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:24:06,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:24:06,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934123917] [2022-09-20 21:24:06,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934123917] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:24:06,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209664946] [2022-09-20 21:24:06,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:24:06,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:24:06,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:24:06,938 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:24:06,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-09-20 21:24:06,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:24:06,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:24:06,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 21:24:06,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:24:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:24:07,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:24:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:24:07,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209664946] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:24:07,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:24:07,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-09-20 21:24:07,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257865556] [2022-09-20 21:24:07,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:24:07,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-09-20 21:24:07,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:24:07,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-09-20 21:24:07,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-09-20 21:24:07,325 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 21:24:07,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 691 places, 4052 transitions, 165134 flow. Second operand has 20 states, 20 states have (on average 63.9) internal successors, (1278), 20 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:24:07,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:24:07,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 21:24:07,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:24:32,081 INFO L130 PetriNetUnfolder]: 4672/14476 cut-off events. [2022-09-20 21:24:32,081 INFO L131 PetriNetUnfolder]: For 744667/744698 co-relation queries the response was YES. [2022-09-20 21:24:32,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187745 conditions, 14476 events. 4672/14476 cut-off events. For 744667/744698 co-relation queries the response was YES. Maximal size of possible extension queue 1017. Compared 169268 event pairs, 102 based on Foata normal form. 20/14449 useless extension candidates. Maximal degree in co-relation 187553. Up to 3557 conditions per place. [2022-09-20 21:24:32,701 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 1734 selfloop transitions, 3242 changer transitions 5/5045 dead transitions. [2022-09-20 21:24:32,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 731 places, 5045 transitions, 217195 flow [2022-09-20 21:24:32,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-09-20 21:24:32,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-09-20 21:24:32,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2713 transitions. [2022-09-20 21:24:32,705 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.787746806039489 [2022-09-20 21:24:32,705 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2713 transitions. [2022-09-20 21:24:32,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2713 transitions. [2022-09-20 21:24:32,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:24:32,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2713 transitions. [2022-09-20 21:24:32,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 66.17073170731707) internal successors, (2713), 41 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:24:32,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:24:32,711 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:24:32,712 INFO L175 Difference]: Start difference. First operand has 691 places, 4052 transitions, 165134 flow. Second operand 41 states and 2713 transitions. [2022-09-20 21:24:32,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 731 places, 5045 transitions, 217195 flow [2022-09-20 21:24:48,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 727 places, 5045 transitions, 214679 flow, removed 984 selfloop flow, removed 4 redundant places. [2022-09-20 21:24:48,812 INFO L231 Difference]: Finished difference. Result has 751 places, 4980 transitions, 214420 flow [2022-09-20 21:24:48,816 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=163195, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4052, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=214420, PETRI_PLACES=751, PETRI_TRANSITIONS=4980} [2022-09-20 21:24:48,816 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 677 predicate places. [2022-09-20 21:24:48,816 INFO L495 AbstractCegarLoop]: Abstraction has has 751 places, 4980 transitions, 214420 flow [2022-09-20 21:24:48,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 63.9) internal successors, (1278), 20 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:24:48,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:24:48,816 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:24:48,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-09-20 21:24:49,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:24:49,017 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:24:49,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:24:49,018 INFO L85 PathProgramCache]: Analyzing trace with hash -436944797, now seen corresponding path program 17 times [2022-09-20 21:24:49,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:24:49,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049401959] [2022-09-20 21:24:49,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:24:49,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:24:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:24:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:24:49,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:24:49,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049401959] [2022-09-20 21:24:49,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049401959] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:24:49,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833735875] [2022-09-20 21:24:49,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 21:24:49,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:24:49,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:24:49,150 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:24:49,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-09-20 21:24:49,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-09-20 21:24:49,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:24:49,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 21:24:49,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:24:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:24:49,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:24:49,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:24:49,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833735875] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:24:49,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:24:49,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-09-20 21:24:49,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547297486] [2022-09-20 21:24:49,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:24:49,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-20 21:24:49,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:24:49,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-20 21:24:49,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-09-20 21:24:49,595 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 21:24:49,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 751 places, 4980 transitions, 214420 flow. Second operand has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:24:49,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:24:49,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 21:24:49,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:25:29,518 INFO L130 PetriNetUnfolder]: 5724/17758 cut-off events. [2022-09-20 21:25:29,518 INFO L131 PetriNetUnfolder]: For 996897/996938 co-relation queries the response was YES. [2022-09-20 21:25:29,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242014 conditions, 17758 events. 5724/17758 cut-off events. For 996897/996938 co-relation queries the response was YES. Maximal size of possible extension queue 1224. Compared 215209 event pairs, 152 based on Foata normal form. 26/17766 useless extension candidates. Maximal degree in co-relation 241799. Up to 3105 conditions per place. [2022-09-20 21:25:29,997 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 1173 selfloop transitions, 5072 changer transitions 22/6331 dead transitions. [2022-09-20 21:25:29,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 828 places, 6331 transitions, 283077 flow [2022-09-20 21:25:29,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-09-20 21:25:29,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2022-09-20 21:25:30,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 5200 transitions. [2022-09-20 21:25:30,001 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7836045810729355 [2022-09-20 21:25:30,002 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 5200 transitions. [2022-09-20 21:25:30,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 5200 transitions. [2022-09-20 21:25:30,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:25:30,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 5200 transitions. [2022-09-20 21:25:30,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 65.82278481012658) internal successors, (5200), 79 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:25:30,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 84.0) internal successors, (6720), 80 states have internal predecessors, (6720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:25:30,014 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 84.0) internal successors, (6720), 80 states have internal predecessors, (6720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:25:30,014 INFO L175 Difference]: Start difference. First operand has 751 places, 4980 transitions, 214420 flow. Second operand 79 states and 5200 transitions. [2022-09-20 21:25:30,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 828 places, 6331 transitions, 283077 flow [2022-09-20 21:25:57,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 823 places, 6331 transitions, 282311 flow, removed 356 selfloop flow, removed 5 redundant places. [2022-09-20 21:25:57,470 INFO L231 Difference]: Finished difference. Result has 857 places, 6192 transitions, 285144 flow [2022-09-20 21:25:57,475 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=213806, PETRI_DIFFERENCE_MINUEND_PLACES=745, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4980, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3944, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=783, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=285144, PETRI_PLACES=857, PETRI_TRANSITIONS=6192} [2022-09-20 21:25:57,476 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 783 predicate places. [2022-09-20 21:25:57,476 INFO L495 AbstractCegarLoop]: Abstraction has has 857 places, 6192 transitions, 285144 flow [2022-09-20 21:25:57,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.0) internal successors, (1152), 18 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:25:57,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:25:57,477 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:25:57,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-09-20 21:25:57,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:25:57,680 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:25:57,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:25:57,680 INFO L85 PathProgramCache]: Analyzing trace with hash 834809149, now seen corresponding path program 18 times [2022-09-20 21:25:57,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:25:57,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686619003] [2022-09-20 21:25:57,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:25:57,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:25:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:25:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:25:57,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:25:57,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686619003] [2022-09-20 21:25:57,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686619003] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:25:57,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264868814] [2022-09-20 21:25:57,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 21:25:57,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:25:57,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:25:57,790 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:25:57,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-09-20 21:25:57,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-09-20 21:25:57,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:25:57,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 21:25:57,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:25:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:25:57,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:25:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:25:58,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264868814] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:25:58,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:25:58,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-09-20 21:25:58,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527624497] [2022-09-20 21:25:58,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:25:58,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-09-20 21:25:58,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:25:58,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-09-20 21:25:58,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-09-20 21:25:58,237 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 21:25:58,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 857 places, 6192 transitions, 285144 flow. Second operand has 19 states, 19 states have (on average 63.94736842105263) internal successors, (1215), 19 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:25:58,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:25:58,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 21:25:58,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:26:46,993 INFO L130 PetriNetUnfolder]: 5817/17990 cut-off events. [2022-09-20 21:26:46,994 INFO L131 PetriNetUnfolder]: For 1139998/1140038 co-relation queries the response was YES. [2022-09-20 21:26:47,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261699 conditions, 17990 events. 5817/17990 cut-off events. For 1139998/1140038 co-relation queries the response was YES. Maximal size of possible extension queue 1244. Compared 218374 event pairs, 154 based on Foata normal form. 25/17992 useless extension candidates. Maximal degree in co-relation 261452. Up to 3719 conditions per place. [2022-09-20 21:26:47,659 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 1611 selfloop transitions, 4705 changer transitions 30/6410 dead transitions. [2022-09-20 21:26:47,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 893 places, 6410 transitions, 306943 flow [2022-09-20 21:26:47,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-09-20 21:26:47,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-09-20 21:26:47,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2703 transitions. [2022-09-20 21:26:47,663 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7848432055749129 [2022-09-20 21:26:47,663 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2703 transitions. [2022-09-20 21:26:47,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2703 transitions. [2022-09-20 21:26:47,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:26:47,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2703 transitions. [2022-09-20 21:26:47,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 65.92682926829268) internal successors, (2703), 41 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:26:47,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:26:47,669 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:26:47,670 INFO L175 Difference]: Start difference. First operand has 857 places, 6192 transitions, 285144 flow. Second operand 41 states and 2703 transitions. [2022-09-20 21:26:47,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 893 places, 6410 transitions, 306943 flow [2022-09-20 21:27:25,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 882 places, 6410 transitions, 304463 flow, removed 749 selfloop flow, removed 11 redundant places. [2022-09-20 21:27:26,358 INFO L231 Difference]: Finished difference. Result has 895 places, 6290 transitions, 304779 flow [2022-09-20 21:27:26,363 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=281749, PETRI_DIFFERENCE_MINUEND_PLACES=842, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4551, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=304779, PETRI_PLACES=895, PETRI_TRANSITIONS=6290} [2022-09-20 21:27:26,364 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 821 predicate places. [2022-09-20 21:27:26,364 INFO L495 AbstractCegarLoop]: Abstraction has has 895 places, 6290 transitions, 304779 flow [2022-09-20 21:27:26,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.94736842105263) internal successors, (1215), 19 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:27:26,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:27:26,364 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:27:26,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-09-20 21:27:26,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-09-20 21:27:26,575 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:27:26,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:27:26,576 INFO L85 PathProgramCache]: Analyzing trace with hash -620771523, now seen corresponding path program 19 times [2022-09-20 21:27:26,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:27:26,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760013767] [2022-09-20 21:27:26,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:27:26,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:27:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:27:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:27:26,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:27:26,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760013767] [2022-09-20 21:27:26,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760013767] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:27:26,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789740741] [2022-09-20 21:27:26,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 21:27:26,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:27:26,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:27:26,687 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:27:26,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-09-20 21:27:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:27:26,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 21:27:26,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:27:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:27:26,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:27:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:27:27,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789740741] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:27:27,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:27:27,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-09-20 21:27:27,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324586615] [2022-09-20 21:27:27,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:27:27,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-09-20 21:27:27,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:27:27,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-09-20 21:27:27,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-09-20 21:27:27,087 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 21:27:27,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 895 places, 6290 transitions, 304779 flow. Second operand has 19 states, 19 states have (on average 63.89473684210526) internal successors, (1214), 19 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:27:27,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:27:27,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 21:27:27,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:28:22,271 INFO L130 PetriNetUnfolder]: 6028/18899 cut-off events. [2022-09-20 21:28:22,271 INFO L131 PetriNetUnfolder]: For 1298715/1298766 co-relation queries the response was YES. [2022-09-20 21:28:22,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283045 conditions, 18899 events. 6028/18899 cut-off events. For 1298715/1298766 co-relation queries the response was YES. Maximal size of possible extension queue 1314. Compared 232715 event pairs, 136 based on Foata normal form. 30/18910 useless extension candidates. Maximal degree in co-relation 282792. Up to 3384 conditions per place. [2022-09-20 21:28:22,901 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 1382 selfloop transitions, 5251 changer transitions 12/6709 dead transitions. [2022-09-20 21:28:22,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 941 places, 6709 transitions, 335248 flow [2022-09-20 21:28:22,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-09-20 21:28:22,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-09-20 21:28:22,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3612 transitions. [2022-09-20 21:28:22,905 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7818181818181819 [2022-09-20 21:28:22,905 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3612 transitions. [2022-09-20 21:28:22,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3612 transitions. [2022-09-20 21:28:22,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:28:22,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3612 transitions. [2022-09-20 21:28:22,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 65.67272727272727) internal successors, (3612), 55 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:28:22,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 84.0) internal successors, (4704), 56 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:28:22,911 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 84.0) internal successors, (4704), 56 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:28:22,911 INFO L175 Difference]: Start difference. First operand has 895 places, 6290 transitions, 304779 flow. Second operand 55 states and 3612 transitions. [2022-09-20 21:28:22,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 941 places, 6709 transitions, 335248 flow [2022-09-20 21:29:06,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 925 places, 6709 transitions, 334588 flow, removed 77 selfloop flow, removed 16 redundant places. [2022-09-20 21:29:07,315 INFO L231 Difference]: Finished difference. Result has 944 places, 6578 transitions, 335953 flow [2022-09-20 21:29:07,320 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=304129, PETRI_DIFFERENCE_MINUEND_PLACES=871, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4976, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=335953, PETRI_PLACES=944, PETRI_TRANSITIONS=6578} [2022-09-20 21:29:07,320 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 870 predicate places. [2022-09-20 21:29:07,321 INFO L495 AbstractCegarLoop]: Abstraction has has 944 places, 6578 transitions, 335953 flow [2022-09-20 21:29:07,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.89473684210526) internal successors, (1214), 19 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:29:07,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:29:07,321 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:29:07,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-09-20 21:29:07,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-09-20 21:29:07,526 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:29:07,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:29:07,527 INFO L85 PathProgramCache]: Analyzing trace with hash -874581941, now seen corresponding path program 20 times [2022-09-20 21:29:07,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:29:07,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301401612] [2022-09-20 21:29:07,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:29:07,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:29:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:29:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:29:07,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:29:07,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301401612] [2022-09-20 21:29:07,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301401612] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:29:07,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088406368] [2022-09-20 21:29:07,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:29:07,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:29:07,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:29:07,635 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:29:07,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-09-20 21:29:07,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:29:07,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:29:07,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 21:29:07,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:29:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:29:07,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:29:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:29:08,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088406368] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:29:08,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:29:08,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-09-20 21:29:08,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986702550] [2022-09-20 21:29:08,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:29:08,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-09-20 21:29:08,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:29:08,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-09-20 21:29:08,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-09-20 21:29:08,280 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 21:29:08,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 944 places, 6578 transitions, 335953 flow. Second operand has 19 states, 19 states have (on average 63.94736842105263) internal successors, (1215), 19 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:29:08,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:29:08,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 21:29:08,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:30:19,637 INFO L130 PetriNetUnfolder]: 6470/20221 cut-off events. [2022-09-20 21:30:19,638 INFO L131 PetriNetUnfolder]: For 1570226/1570310 co-relation queries the response was YES. [2022-09-20 21:30:20,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321313 conditions, 20221 events. 6470/20221 cut-off events. For 1570226/1570310 co-relation queries the response was YES. Maximal size of possible extension queue 1396. Compared 251778 event pairs, 193 based on Foata normal form. 38/20221 useless extension candidates. Maximal degree in co-relation 321043. Up to 3808 conditions per place. [2022-09-20 21:30:20,407 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 2386 selfloop transitions, 4730 changer transitions 30/7210 dead transitions. [2022-09-20 21:30:20,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 970 places, 7210 transitions, 381581 flow [2022-09-20 21:30:20,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-09-20 21:30:20,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-09-20 21:30:20,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1972 transitions. [2022-09-20 21:30:20,410 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7825396825396825 [2022-09-20 21:30:20,410 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1972 transitions. [2022-09-20 21:30:20,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1972 transitions. [2022-09-20 21:30:20,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:30:20,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1972 transitions. [2022-09-20 21:30:20,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 65.73333333333333) internal successors, (1972), 30 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:30:20,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 84.0) internal successors, (2604), 31 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:30:20,414 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 84.0) internal successors, (2604), 31 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:30:20,414 INFO L175 Difference]: Start difference. First operand has 944 places, 6578 transitions, 335953 flow. Second operand 30 states and 1972 transitions. [2022-09-20 21:30:20,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 970 places, 7210 transitions, 381581 flow [2022-09-20 21:31:17,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 957 places, 7210 transitions, 377255 flow, removed 365 selfloop flow, removed 13 redundant places. [2022-09-20 21:31:18,034 INFO L231 Difference]: Finished difference. Result has 971 places, 7048 transitions, 374741 flow [2022-09-20 21:31:18,041 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=331880, PETRI_DIFFERENCE_MINUEND_PLACES=928, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2019, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=374741, PETRI_PLACES=971, PETRI_TRANSITIONS=7048} [2022-09-20 21:31:18,042 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 897 predicate places. [2022-09-20 21:31:18,042 INFO L495 AbstractCegarLoop]: Abstraction has has 971 places, 7048 transitions, 374741 flow [2022-09-20 21:31:18,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.94736842105263) internal successors, (1215), 19 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:31:18,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:31:18,042 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:31:18,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-09-20 21:31:18,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:31:18,255 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:31:18,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:31:18,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2012137599, now seen corresponding path program 21 times [2022-09-20 21:31:18,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:31:18,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929074098] [2022-09-20 21:31:18,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:31:18,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:31:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:31:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:31:18,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:31:18,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929074098] [2022-09-20 21:31:18,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929074098] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:31:18,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771213004] [2022-09-20 21:31:18,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:31:18,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:31:18,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:31:18,407 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:31:18,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-09-20 21:31:18,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-09-20 21:31:18,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:31:18,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 21:31:18,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:31:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:31:18,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:31:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:31:19,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771213004] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:31:19,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:31:19,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-09-20 21:31:19,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908596885] [2022-09-20 21:31:19,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:31:19,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-09-20 21:31:19,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:31:19,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-09-20 21:31:19,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-09-20 21:31:19,086 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 21:31:19,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 971 places, 7048 transitions, 374741 flow. Second operand has 19 states, 19 states have (on average 63.94736842105263) internal successors, (1215), 19 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:31:19,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:31:19,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 21:31:19,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:32:44,231 INFO L130 PetriNetUnfolder]: 6907/21461 cut-off events. [2022-09-20 21:32:44,231 INFO L131 PetriNetUnfolder]: For 1870962/1871047 co-relation queries the response was YES. [2022-09-20 21:32:45,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356167 conditions, 21461 events. 6907/21461 cut-off events. For 1870962/1871047 co-relation queries the response was YES. Maximal size of possible extension queue 1457. Compared 269075 event pairs, 175 based on Foata normal form. 37/21468 useless extension candidates. Maximal degree in co-relation 355886. Up to 4153 conditions per place. [2022-09-20 21:32:45,320 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 1350 selfloop transitions, 6260 changer transitions 13/7687 dead transitions. [2022-09-20 21:32:45,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1019 places, 7687 transitions, 421926 flow [2022-09-20 21:32:45,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-09-20 21:32:45,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-09-20 21:32:45,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3807 transitions. [2022-09-20 21:32:45,324 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7814039408866995 [2022-09-20 21:32:45,324 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3807 transitions. [2022-09-20 21:32:45,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3807 transitions. [2022-09-20 21:32:45,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:32:45,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3807 transitions. [2022-09-20 21:32:45,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 65.63793103448276) internal successors, (3807), 58 states have internal predecessors, (3807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:32:45,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 84.0) internal successors, (4956), 59 states have internal predecessors, (4956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:32:45,332 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 84.0) internal successors, (4956), 59 states have internal predecessors, (4956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:32:45,332 INFO L175 Difference]: Start difference. First operand has 971 places, 7048 transitions, 374741 flow. Second operand 58 states and 3807 transitions. [2022-09-20 21:32:45,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1019 places, 7687 transitions, 421926 flow [2022-09-20 21:33:51,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1008 places, 7687 transitions, 420562 flow, removed 131 selfloop flow, removed 11 redundant places. [2022-09-20 21:33:51,838 INFO L231 Difference]: Finished difference. Result has 1031 places, 7609 transitions, 426380 flow [2022-09-20 21:33:51,844 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=372956, PETRI_DIFFERENCE_MINUEND_PLACES=951, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7038, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5717, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=426380, PETRI_PLACES=1031, PETRI_TRANSITIONS=7609} [2022-09-20 21:33:51,845 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 957 predicate places. [2022-09-20 21:33:51,845 INFO L495 AbstractCegarLoop]: Abstraction has has 1031 places, 7609 transitions, 426380 flow [2022-09-20 21:33:51,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.94736842105263) internal successors, (1215), 19 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:33:51,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:33:51,846 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:33:51,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-09-20 21:33:52,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:33:52,072 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:33:52,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:33:52,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1216034207, now seen corresponding path program 22 times [2022-09-20 21:33:52,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:33:52,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211095158] [2022-09-20 21:33:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:33:52,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:33:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:33:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:33:52,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:33:52,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211095158] [2022-09-20 21:33:52,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211095158] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:33:52,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786889195] [2022-09-20 21:33:52,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:33:52,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:33:52,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:33:52,423 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:33:52,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-09-20 21:33:52,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:33:52,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:33:52,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 16 conjunts are in the unsatisfiable core [2022-09-20 21:33:52,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:33:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:33:52,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:33:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:33:53,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786889195] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:33:53,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:33:53,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 9] total 25 [2022-09-20 21:33:53,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549819893] [2022-09-20 21:33:53,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:33:53,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-09-20 21:33:53,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:33:53,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-09-20 21:33:53,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-09-20 21:33:53,072 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 84 [2022-09-20 21:33:53,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1031 places, 7609 transitions, 426380 flow. Second operand has 25 states, 25 states have (on average 52.32) internal successors, (1308), 25 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:33:53,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:33:53,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 84 [2022-09-20 21:33:53,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-09-20 21:35:38,987 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 [2022-09-20 21:35:38,988 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-09-20 21:35:39,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-09-20 21:35:39,781 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-09-20 21:35:39,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-09-20 21:35:39,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-09-20 21:35:39,982 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (25states, 49/84 universal loopers) in iteration 26,while PetriNetUnfolder was constructing finite prefix that currently has 505909 conditions, 24273 events (9095/24272 cut-off events. For 2890143/2890143 co-relation queries the response was YES. Maximal size of possible extension queue 2235. Compared 315196 event pairs, 154 based on Foata normal form. 0/26034 useless extension candidates. Maximal degree in co-relation 505609. Up to 5441 conditions per place.). [2022-09-20 21:35:39,983 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-09-20 21:35:39,984 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-09-20 21:35:39,984 INFO L444 BasicCegarLoop]: Path program histogram: [22, 2, 1, 1] [2022-09-20 21:35:39,987 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-09-20 21:35:39,987 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-09-20 21:35:40,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 09:35:40 BasicIcfg [2022-09-20 21:35:40,000 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-09-20 21:35:40,001 INFO L158 Benchmark]: Toolchain (without parser) took 810240.99ms. Allocated memory was 172.0MB in the beginning and 4.3GB in the end (delta: 4.1GB). Free memory was 149.4MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 3.4GB. Max. memory is 8.0GB. [2022-09-20 21:35:40,001 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 172.0MB. Free memory is still 131.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-09-20 21:35:40,001 INFO L158 Benchmark]: CACSL2BoogieTranslator took 208.93ms. Allocated memory is still 172.0MB. Free memory was 149.1MB in the beginning and 144.9MB in the end (delta: 4.2MB). Peak memory consumption was 8.5MB. Max. memory is 8.0GB. [2022-09-20 21:35:40,002 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.42ms. Allocated memory is still 172.0MB. Free memory was 144.9MB in the beginning and 143.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-09-20 21:35:40,002 INFO L158 Benchmark]: Boogie Preprocessor took 16.90ms. Allocated memory is still 172.0MB. Free memory was 143.4MB in the beginning and 142.1MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-09-20 21:35:40,002 INFO L158 Benchmark]: RCFGBuilder took 283.85ms. Allocated memory is still 172.0MB. Free memory was 142.1MB in the beginning and 129.2MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-09-20 21:35:40,002 INFO L158 Benchmark]: TraceAbstraction took 809693.79ms. Allocated memory was 172.0MB in the beginning and 4.3GB in the end (delta: 4.1GB). Free memory was 128.5MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 3.3GB. Max. memory is 8.0GB. [2022-09-20 21:35:40,007 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### [2022-09-20 21:35:40,008 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 --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 172.0MB. Free memory is still 131.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 208.93ms. Allocated memory is still 172.0MB. Free memory was 149.1MB in the beginning and 144.9MB in the end (delta: 4.2MB). Peak memory consumption was 8.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 32.42ms. Allocated memory is still 172.0MB. Free memory was 144.9MB in the beginning and 143.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.90ms. Allocated memory is still 172.0MB. Free memory was 143.4MB in the beginning and 142.1MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 283.85ms. Allocated memory is still 172.0MB. Free memory was 142.1MB in the beginning and 129.2MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 809693.79ms. Allocated memory was 172.0MB in the beginning and 4.3GB in the end (delta: 4.1GB). Free memory was 128.5MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 3.3GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (25states, 49/84 universal loopers) in iteration 26,while PetriNetUnfolder was constructing finite prefix that currently has 505909 conditions, 24273 events (9095/24272 cut-off events. For 2890143/2890143 co-relation queries the response was YES. Maximal size of possible extension queue 2235. Compared 315196 event pairs, 154 based on Foata normal form. 0/26034 useless extension candidates. Maximal degree in co-relation 505609. Up to 5441 conditions per place.). - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (25states, 49/84 universal loopers) in iteration 26,while PetriNetUnfolder was constructing finite prefix that currently has 505909 conditions, 24273 events (9095/24272 cut-off events. For 2890143/2890143 co-relation queries the response was YES. Maximal size of possible extension queue 2235. Compared 315196 event pairs, 154 based on Foata normal form. 0/26034 useless extension candidates. Maximal degree in co-relation 505609. Up to 5441 conditions per place.). - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (25states, 49/84 universal loopers) in iteration 26,while PetriNetUnfolder was constructing finite prefix that currently has 505909 conditions, 24273 events (9095/24272 cut-off events. For 2890143/2890143 co-relation queries the response was YES. Maximal size of possible extension queue 2235. Compared 315196 event pairs, 154 based on Foata normal form. 0/26034 useless extension candidates. Maximal degree in co-relation 505609. Up to 5441 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 96 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 809.6s, OverallIterations: 26, TraceHistogramMax: 2, PathProgramHistogramMax: 22, EmptinessCheckTime: 0.0s, AutomataDifference: 788.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2957 SdHoareTripleChecker+Valid, 12.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2957 mSDsluCounter, 2202 SdHoareTripleChecker+Invalid, 10.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2961 mSDsCounter, 1369 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10735 IncrementalHoareTripleChecker+Invalid, 12104 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1369 mSolverCounterUnsat, 466 mSDtfsCounter, 10735 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4283 GetRequests, 3162 SyntacticMatches, 34 SemanticMatches, 1087 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18817 ImplicationChecksByTransitivity, 32.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=426380occurred in iteration=25, InterpolantAutomatonStates: 934, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 13.1s InterpolantComputationTime, 3532 NumberOfCodeBlocks, 3416 NumberOfCodeBlocksAsserted, 84 NumberOfCheckSat, 5100 ConstructedInterpolants, 0 QuantifiedInterpolants, 23726 SizeOfPredicates, 243 NumberOfNonLiveVariables, 3511 ConjunctsInSsa, 282 ConjunctsInUnsatCore, 73 InterpolantComputations, 4 PerfectInterpolantSequences, 311/506 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown