/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 05:08:01,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 05:08:01,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 05:08:01,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 05:08:01,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 05:08:01,686 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 05:08:01,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 05:08:01,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 05:08:01,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 05:08:01,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 05:08:01,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 05:08:01,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 05:08:01,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 05:08:01,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 05:08:01,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 05:08:01,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 05:08:01,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 05:08:01,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 05:08:01,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 05:08:01,705 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 05:08:01,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 05:08:01,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 05:08:01,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 05:08:01,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 05:08:01,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 05:08:01,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 05:08:01,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 05:08:01,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 05:08:01,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 05:08:01,717 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 05:08:01,717 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 05:08:01,718 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 05:08:01,718 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 05:08:01,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 05:08:01,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 05:08:01,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 05:08:01,720 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 05:08:01,739 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 05:08:01,739 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 05:08:01,740 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 05:08:01,740 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 05:08:01,741 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 05:08:01,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 05:08:01,741 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 05:08:01,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 05:08:01,741 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 05:08:01,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 05:08:01,742 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 05:08:01,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 05:08:01,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 05:08:01,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 05:08:01,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 05:08:01,742 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 05:08:01,742 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 05:08:01,742 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 05:08:01,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 05:08:01,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 05:08:01,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 05:08:01,743 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 05:08:01,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 05:08:01,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 05:08:01,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 05:08:01,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 05:08:01,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 05:08:01,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 05:08:01,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 05:08:01,744 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 05:08:01,744 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 05:08:01,744 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 05:08:01,934 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 05:08:01,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 05:08:01,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 05:08:01,959 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 05:08:01,959 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 05:08:01,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-01-28 05:08:02,929 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 05:08:03,087 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 05:08:03,088 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-01-28 05:08:03,093 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4760f98ac/8e65a54fd5c94334b54459ef5cd74009/FLAGc6654a6aa [2023-01-28 05:08:03,504 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4760f98ac/8e65a54fd5c94334b54459ef5cd74009 [2023-01-28 05:08:03,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 05:08:03,510 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 05:08:03,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 05:08:03,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 05:08:03,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 05:08:03,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 05:08:03" (1/1) ... [2023-01-28 05:08:03,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55fd7ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:08:03, skipping insertion in model container [2023-01-28 05:08:03,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 05:08:03" (1/1) ... [2023-01-28 05:08:03,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 05:08:03,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 05:08:03,653 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2023-01-28 05:08:03,656 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 05:08:03,663 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 05:08:03,681 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2023-01-28 05:08:03,685 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 05:08:03,690 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 05:08:03,691 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 05:08:03,695 INFO L208 MainTranslator]: Completed translation [2023-01-28 05:08:03,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:08:03 WrapperNode [2023-01-28 05:08:03,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 05:08:03,697 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 05:08:03,697 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 05:08:03,697 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 05:08:03,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:08:03" (1/1) ... [2023-01-28 05:08:03,706 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:08:03" (1/1) ... [2023-01-28 05:08:03,721 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2023-01-28 05:08:03,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 05:08:03,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 05:08:03,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 05:08:03,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 05:08:03,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:08:03" (1/1) ... [2023-01-28 05:08:03,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:08:03" (1/1) ... [2023-01-28 05:08:03,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:08:03" (1/1) ... [2023-01-28 05:08:03,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:08:03" (1/1) ... [2023-01-28 05:08:03,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:08:03" (1/1) ... [2023-01-28 05:08:03,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:08:03" (1/1) ... [2023-01-28 05:08:03,747 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:08:03" (1/1) ... [2023-01-28 05:08:03,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:08:03" (1/1) ... [2023-01-28 05:08:03,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 05:08:03,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 05:08:03,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 05:08:03,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 05:08:03,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:08:03" (1/1) ... [2023-01-28 05:08:03,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 05:08:03,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:03,776 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 05:08:03,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 05:08:03,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 05:08:03,810 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 05:08:03,810 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 05:08:03,810 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 05:08:03,810 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 05:08:03,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 05:08:03,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 05:08:03,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 05:08:03,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 05:08:03,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 05:08:03,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 05:08:03,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 05:08:03,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 05:08:03,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 05:08:03,812 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 05:08:03,885 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 05:08:03,886 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 05:08:03,986 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 05:08:04,015 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 05:08:04,015 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-28 05:08:04,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 05:08:04 BoogieIcfgContainer [2023-01-28 05:08:04,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 05:08:04,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 05:08:04,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 05:08:04,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 05:08:04,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 05:08:03" (1/3) ... [2023-01-28 05:08:04,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d36d33d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 05:08:04, skipping insertion in model container [2023-01-28 05:08:04,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:08:03" (2/3) ... [2023-01-28 05:08:04,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d36d33d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 05:08:04, skipping insertion in model container [2023-01-28 05:08:04,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 05:08:04" (3/3) ... [2023-01-28 05:08:04,021 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-01-28 05:08:04,031 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 05:08:04,032 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 05:08:04,032 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 05:08:04,076 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 05:08:04,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 168 flow [2023-01-28 05:08:04,130 INFO L130 PetriNetUnfolder]: 6/74 cut-off events. [2023-01-28 05:08:04,131 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 05:08:04,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 74 events. 6/74 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. 0/67 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2023-01-28 05:08:04,134 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 76 transitions, 168 flow [2023-01-28 05:08:04,136 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 66 transitions, 144 flow [2023-01-28 05:08:04,138 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 05:08:04,144 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 66 transitions, 144 flow [2023-01-28 05:08:04,145 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 66 transitions, 144 flow [2023-01-28 05:08:04,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 66 transitions, 144 flow [2023-01-28 05:08:04,163 INFO L130 PetriNetUnfolder]: 6/66 cut-off events. [2023-01-28 05:08:04,163 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 05:08:04,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 66 events. 6/66 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2023-01-28 05:08:04,164 INFO L119 LiptonReduction]: Number of co-enabled transitions 404 [2023-01-28 05:08:05,798 INFO L134 LiptonReduction]: Checked pairs total: 413 [2023-01-28 05:08:05,798 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-01-28 05:08:05,807 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 05:08:05,811 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;@24f1c036, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 05:08:05,811 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 05:08:05,815 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-01-28 05:08:05,815 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 05:08:05,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:05,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:05,815 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:05,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:05,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1270362665, now seen corresponding path program 1 times [2023-01-28 05:08:05,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:05,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923651818] [2023-01-28 05:08:05,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:05,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:06,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:06,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923651818] [2023-01-28 05:08:06,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923651818] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 05:08:06,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 05:08:06,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 05:08:06,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624093125] [2023-01-28 05:08:06,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 05:08:06,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 05:08:06,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:06,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 05:08:06,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 05:08:06,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 137 [2023-01-28 05:08:06,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:06,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:06,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 137 [2023-01-28 05:08:06,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:06,139 INFO L130 PetriNetUnfolder]: 59/100 cut-off events. [2023-01-28 05:08:06,140 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-01-28 05:08:06,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 100 events. 59/100 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 251 event pairs, 23 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 165. Up to 78 conditions per place. [2023-01-28 05:08:06,141 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-01-28 05:08:06,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2023-01-28 05:08:06,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 05:08:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 05:08:06,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 249 transitions. [2023-01-28 05:08:06,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543795620437956 [2023-01-28 05:08:06,150 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 249 transitions. [2023-01-28 05:08:06,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 249 transitions. [2023-01-28 05:08:06,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:06,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 249 transitions. [2023-01-28 05:08:06,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:06,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:06,157 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:06,158 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 249 transitions. [2023-01-28 05:08:06,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2023-01-28 05:08:06,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 05:08:06,161 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-01-28 05:08:06,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-01-28 05:08:06,165 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-01-28 05:08:06,165 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-01-28 05:08:06,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:06,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:06,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:06,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 05:08:06,166 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:06,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:06,166 INFO L85 PathProgramCache]: Analyzing trace with hash 33938299, now seen corresponding path program 1 times [2023-01-28 05:08:06,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:06,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135844100] [2023-01-28 05:08:06,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:06,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:06,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:06,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135844100] [2023-01-28 05:08:06,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135844100] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 05:08:06,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 05:08:06,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 05:08:06,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975341376] [2023-01-28 05:08:06,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 05:08:06,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 05:08:06,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:06,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 05:08:06,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 05:08:06,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 137 [2023-01-28 05:08:06,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:06,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:06,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 137 [2023-01-28 05:08:06,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:06,292 INFO L130 PetriNetUnfolder]: 86/161 cut-off events. [2023-01-28 05:08:06,292 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2023-01-28 05:08:06,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 161 events. 86/161 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 484 event pairs, 33 based on Foata normal form. 4/131 useless extension candidates. Maximal degree in co-relation 89. Up to 93 conditions per place. [2023-01-28 05:08:06,293 INFO L137 encePairwiseOnDemand]: 132/137 looper letters, 30 selfloop transitions, 3 changer transitions 6/39 dead transitions. [2023-01-28 05:08:06,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 39 transitions, 197 flow [2023-01-28 05:08:06,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 05:08:06,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 05:08:06,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 307 transitions. [2023-01-28 05:08:06,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481751824817518 [2023-01-28 05:08:06,295 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 307 transitions. [2023-01-28 05:08:06,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 307 transitions. [2023-01-28 05:08:06,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:06,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 307 transitions. [2023-01-28 05:08:06,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 61.4) internal successors, (307), 5 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:06,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:06,298 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:06,298 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 5 states and 307 transitions. [2023-01-28 05:08:06,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 39 transitions, 197 flow [2023-01-28 05:08:06,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 39 transitions, 183 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-01-28 05:08:06,300 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 64 flow [2023-01-28 05:08:06,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-01-28 05:08:06,300 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-01-28 05:08:06,300 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 64 flow [2023-01-28 05:08:06,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 56.8) internal successors, (284), 5 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:06,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:06,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:06,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 05:08:06,301 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:06,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:06,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1659358149, now seen corresponding path program 2 times [2023-01-28 05:08:06,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:06,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267545363] [2023-01-28 05:08:06,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:06,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:06,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:06,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267545363] [2023-01-28 05:08:06,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267545363] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:06,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83178725] [2023-01-28 05:08:06,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:08:06,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:06,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:06,361 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:08:06,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 05:08:06,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-28 05:08:06,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:06,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 05:08:06,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:08:06,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 05:08:06,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83178725] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 05:08:06,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 05:08:06,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-01-28 05:08:06,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397643359] [2023-01-28 05:08:06,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 05:08:06,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 05:08:06,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:06,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 05:08:06,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-28 05:08:06,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-01-28 05:08:06,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:06,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:06,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-01-28 05:08:06,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:06,515 INFO L130 PetriNetUnfolder]: 51/94 cut-off events. [2023-01-28 05:08:06,515 INFO L131 PetriNetUnfolder]: For 52/59 co-relation queries the response was YES. [2023-01-28 05:08:06,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 94 events. 51/94 cut-off events. For 52/59 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 228 event pairs, 24 based on Foata normal form. 15/89 useless extension candidates. Maximal degree in co-relation 133. Up to 73 conditions per place. [2023-01-28 05:08:06,516 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-01-28 05:08:06,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 23 transitions, 121 flow [2023-01-28 05:08:06,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 05:08:06,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 05:08:06,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 241 transitions. [2023-01-28 05:08:06,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397810218978102 [2023-01-28 05:08:06,517 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 241 transitions. [2023-01-28 05:08:06,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 241 transitions. [2023-01-28 05:08:06,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:06,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 241 transitions. [2023-01-28 05:08:06,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:06,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:06,520 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:06,520 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 64 flow. Second operand 4 states and 241 transitions. [2023-01-28 05:08:06,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 23 transitions, 121 flow [2023-01-28 05:08:06,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 23 transitions, 111 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-01-28 05:08:06,521 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 56 flow [2023-01-28 05:08:06,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-01-28 05:08:06,521 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-01-28 05:08:06,521 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 56 flow [2023-01-28 05:08:06,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:06,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:06,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:06,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-28 05:08:06,722 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 [2023-01-28 05:08:06,723 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:06,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:06,723 INFO L85 PathProgramCache]: Analyzing trace with hash 479227940, now seen corresponding path program 1 times [2023-01-28 05:08:06,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:06,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065202131] [2023-01-28 05:08:06,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:06,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:08:06,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:06,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065202131] [2023-01-28 05:08:06,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065202131] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:06,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937571558] [2023-01-28 05:08:06,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:06,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:06,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:06,871 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:08:06,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 05:08:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:06,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 05:08:06,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:08:06,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:07,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937571558] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:07,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 05:08:07,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [2, 2] total 4 [2023-01-28 05:08:07,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633032471] [2023-01-28 05:08:07,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 05:08:07,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 05:08:07,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:07,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 05:08:07,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-01-28 05:08:07,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 137 [2023-01-28 05:08:07,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:07,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:07,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 137 [2023-01-28 05:08:07,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:07,196 INFO L130 PetriNetUnfolder]: 84/156 cut-off events. [2023-01-28 05:08:07,196 INFO L131 PetriNetUnfolder]: For 28/47 co-relation queries the response was YES. [2023-01-28 05:08:07,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 156 events. 84/156 cut-off events. For 28/47 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 486 event pairs, 6 based on Foata normal form. 20/135 useless extension candidates. Maximal degree in co-relation 147. Up to 61 conditions per place. [2023-01-28 05:08:07,198 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 28 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2023-01-28 05:08:07,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 40 transitions, 200 flow [2023-01-28 05:08:07,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 05:08:07,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 05:08:07,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 287 transitions. [2023-01-28 05:08:07,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5237226277372263 [2023-01-28 05:08:07,200 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 287 transitions. [2023-01-28 05:08:07,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 287 transitions. [2023-01-28 05:08:07,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:07,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 287 transitions. [2023-01-28 05:08:07,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:07,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:07,204 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:07,205 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 56 flow. Second operand 4 states and 287 transitions. [2023-01-28 05:08:07,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 40 transitions, 200 flow [2023-01-28 05:08:07,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 194 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 05:08:07,206 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 94 flow [2023-01-28 05:08:07,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-01-28 05:08:07,207 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-01-28 05:08:07,207 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 94 flow [2023-01-28 05:08:07,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:07,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:07,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:07,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:07,412 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 [2023-01-28 05:08:07,413 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:07,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:07,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1994220820, now seen corresponding path program 2 times [2023-01-28 05:08:07,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:07,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566156243] [2023-01-28 05:08:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:07,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:08:07,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:07,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566156243] [2023-01-28 05:08:07,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566156243] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:07,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947844859] [2023-01-28 05:08:07,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:08:07,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:07,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:07,477 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:08:07,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 05:08:07,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:08:07,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:07,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 05:08:07,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:08:07,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:08:07,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947844859] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:07,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:07,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 8 [2023-01-28 05:08:07,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123313149] [2023-01-28 05:08:07,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:07,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 05:08:07,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:07,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 05:08:07,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-01-28 05:08:07,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 137 [2023-01-28 05:08:07,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 94 flow. Second operand has 9 states, 9 states have (on average 58.111111111111114) internal successors, (523), 9 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:07,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:07,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 137 [2023-01-28 05:08:07,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:07,781 INFO L130 PetriNetUnfolder]: 132/239 cut-off events. [2023-01-28 05:08:07,781 INFO L131 PetriNetUnfolder]: For 231/243 co-relation queries the response was YES. [2023-01-28 05:08:07,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 239 events. 132/239 cut-off events. For 231/243 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 757 event pairs, 32 based on Foata normal form. 26/264 useless extension candidates. Maximal degree in co-relation 232. Up to 190 conditions per place. [2023-01-28 05:08:07,785 INFO L137 encePairwiseOnDemand]: 132/137 looper letters, 30 selfloop transitions, 8 changer transitions 0/39 dead transitions. [2023-01-28 05:08:07,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 39 transitions, 247 flow [2023-01-28 05:08:07,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 05:08:07,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 05:08:07,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 305 transitions. [2023-01-28 05:08:07,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44525547445255476 [2023-01-28 05:08:07,786 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 305 transitions. [2023-01-28 05:08:07,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 305 transitions. [2023-01-28 05:08:07,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:07,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 305 transitions. [2023-01-28 05:08:07,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 61.0) internal successors, (305), 5 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:07,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:07,789 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:07,789 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 94 flow. Second operand 5 states and 305 transitions. [2023-01-28 05:08:07,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 39 transitions, 247 flow [2023-01-28 05:08:07,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 39 transitions, 247 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 05:08:07,792 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 168 flow [2023-01-28 05:08:07,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-01-28 05:08:07,794 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-01-28 05:08:07,794 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 168 flow [2023-01-28 05:08:07,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.111111111111114) internal successors, (523), 9 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:07,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:07,795 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:07,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:07,999 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 [2023-01-28 05:08:08,000 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:08,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:08,000 INFO L85 PathProgramCache]: Analyzing trace with hash 157752969, now seen corresponding path program 3 times [2023-01-28 05:08:08,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:08,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791728530] [2023-01-28 05:08:08,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:08,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:08,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:08,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:08,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791728530] [2023-01-28 05:08:08,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791728530] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:08,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320117793] [2023-01-28 05:08:08,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:08:08,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:08,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:08,103 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:08:08,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 05:08:08,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 05:08:08,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:08,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 05:08:08,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:08,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:08,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:08,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320117793] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:08,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:08,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-28 05:08:08,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710033178] [2023-01-28 05:08:08,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:08,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 05:08:08,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:08,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 05:08:08,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-01-28 05:08:08,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:08:08,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 168 flow. Second operand has 16 states, 16 states have (on average 54.4375) internal successors, (871), 16 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:08,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:08,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:08:08,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:08,612 INFO L130 PetriNetUnfolder]: 216/388 cut-off events. [2023-01-28 05:08:08,612 INFO L131 PetriNetUnfolder]: For 595/595 co-relation queries the response was YES. [2023-01-28 05:08:08,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 388 events. 216/388 cut-off events. For 595/595 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1459 event pairs, 4 based on Foata normal form. 12/400 useless extension candidates. Maximal degree in co-relation 775. Up to 135 conditions per place. [2023-01-28 05:08:08,614 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 64 selfloop transitions, 29 changer transitions 10/103 dead transitions. [2023-01-28 05:08:08,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 103 transitions, 687 flow [2023-01-28 05:08:08,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 05:08:08,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 05:08:08,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 929 transitions. [2023-01-28 05:08:08,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238138686131387 [2023-01-28 05:08:08,617 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 929 transitions. [2023-01-28 05:08:08,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 929 transitions. [2023-01-28 05:08:08,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:08,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 929 transitions. [2023-01-28 05:08:08,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 58.0625) internal successors, (929), 16 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:08,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 137.0) internal successors, (2329), 17 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:08,625 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 137.0) internal successors, (2329), 17 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:08,625 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 168 flow. Second operand 16 states and 929 transitions. [2023-01-28 05:08:08,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 103 transitions, 687 flow [2023-01-28 05:08:08,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 103 transitions, 677 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-28 05:08:08,629 INFO L231 Difference]: Finished difference. Result has 52 places, 43 transitions, 380 flow [2023-01-28 05:08:08,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=380, PETRI_PLACES=52, PETRI_TRANSITIONS=43} [2023-01-28 05:08:08,630 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2023-01-28 05:08:08,631 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 43 transitions, 380 flow [2023-01-28 05:08:08,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.4375) internal successors, (871), 16 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:08,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:08,631 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:08,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-01-28 05:08:08,836 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 [2023-01-28 05:08:08,836 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:08,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:08,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1226601811, now seen corresponding path program 4 times [2023-01-28 05:08:08,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:08,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591415918] [2023-01-28 05:08:08,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:08,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:08,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:08,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591415918] [2023-01-28 05:08:08,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591415918] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:08,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358149370] [2023-01-28 05:08:08,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:08:08,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:08,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:08,935 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:08:08,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 05:08:08,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:08:08,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:08,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 05:08:08,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:09,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:09,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358149370] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:09,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:09,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 05:08:09,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820246741] [2023-01-28 05:08:09,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:09,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 05:08:09,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:09,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 05:08:09,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-01-28 05:08:09,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:08:09,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 43 transitions, 380 flow. Second operand has 15 states, 15 states have (on average 54.4) internal successors, (816), 15 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:09,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:09,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:08:09,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:09,382 INFO L130 PetriNetUnfolder]: 297/535 cut-off events. [2023-01-28 05:08:09,382 INFO L131 PetriNetUnfolder]: For 2550/2550 co-relation queries the response was YES. [2023-01-28 05:08:09,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2580 conditions, 535 events. 297/535 cut-off events. For 2550/2550 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2218 event pairs, 21 based on Foata normal form. 38/573 useless extension candidates. Maximal degree in co-relation 1688. Up to 290 conditions per place. [2023-01-28 05:08:09,385 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 78 selfloop transitions, 40 changer transitions 1/119 dead transitions. [2023-01-28 05:08:09,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 119 transitions, 1099 flow [2023-01-28 05:08:09,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 05:08:09,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 05:08:09,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 975 transitions. [2023-01-28 05:08:09,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41863460712752254 [2023-01-28 05:08:09,388 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 975 transitions. [2023-01-28 05:08:09,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 975 transitions. [2023-01-28 05:08:09,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:09,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 975 transitions. [2023-01-28 05:08:09,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 57.35294117647059) internal successors, (975), 17 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:09,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 137.0) internal successors, (2466), 18 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:09,393 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 137.0) internal successors, (2466), 18 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:09,393 INFO L175 Difference]: Start difference. First operand has 52 places, 43 transitions, 380 flow. Second operand 17 states and 975 transitions. [2023-01-28 05:08:09,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 119 transitions, 1099 flow [2023-01-28 05:08:09,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 119 transitions, 994 flow, removed 41 selfloop flow, removed 5 redundant places. [2023-01-28 05:08:09,399 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 683 flow [2023-01-28 05:08:09,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=683, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2023-01-28 05:08:09,400 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 50 predicate places. [2023-01-28 05:08:09,400 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 683 flow [2023-01-28 05:08:09,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.4) internal successors, (816), 15 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:09,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:09,400 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:09,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:09,605 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 [2023-01-28 05:08:09,605 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:09,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:09,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1808193385, now seen corresponding path program 5 times [2023-01-28 05:08:09,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:09,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861848963] [2023-01-28 05:08:09,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:09,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:09,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:09,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861848963] [2023-01-28 05:08:09,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861848963] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:09,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967690606] [2023-01-28 05:08:09,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:08:09,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:09,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:09,741 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:08:09,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 05:08:09,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:08:09,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:09,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 05:08:09,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:09,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:09,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967690606] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:09,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:09,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5] total 7 [2023-01-28 05:08:09,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466120618] [2023-01-28 05:08:09,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:09,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 05:08:09,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:09,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 05:08:09,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-01-28 05:08:09,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 137 [2023-01-28 05:08:09,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 683 flow. Second operand has 9 states, 9 states have (on average 66.0) internal successors, (594), 9 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:09,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:09,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 137 [2023-01-28 05:08:09,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:10,122 INFO L130 PetriNetUnfolder]: 395/719 cut-off events. [2023-01-28 05:08:10,122 INFO L131 PetriNetUnfolder]: For 5748/5772 co-relation queries the response was YES. [2023-01-28 05:08:10,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4151 conditions, 719 events. 395/719 cut-off events. For 5748/5772 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3385 event pairs, 44 based on Foata normal form. 13/722 useless extension candidates. Maximal degree in co-relation 3028. Up to 352 conditions per place. [2023-01-28 05:08:10,127 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 71 selfloop transitions, 32 changer transitions 7/117 dead transitions. [2023-01-28 05:08:10,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 117 transitions, 1313 flow [2023-01-28 05:08:10,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 05:08:10,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 05:08:10,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 361 transitions. [2023-01-28 05:08:10,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.527007299270073 [2023-01-28 05:08:10,128 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 361 transitions. [2023-01-28 05:08:10,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 361 transitions. [2023-01-28 05:08:10,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:10,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 361 transitions. [2023-01-28 05:08:10,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 72.2) internal successors, (361), 5 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:10,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:10,130 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 137.0) internal successors, (822), 6 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:10,130 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 683 flow. Second operand 5 states and 361 transitions. [2023-01-28 05:08:10,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 117 transitions, 1313 flow [2023-01-28 05:08:10,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 117 transitions, 1160 flow, removed 72 selfloop flow, removed 3 redundant places. [2023-01-28 05:08:10,142 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 908 flow [2023-01-28 05:08:10,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=908, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2023-01-28 05:08:10,143 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-01-28 05:08:10,143 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 908 flow [2023-01-28 05:08:10,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 66.0) internal successors, (594), 9 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:10,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:10,143 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:10,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:10,348 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 [2023-01-28 05:08:10,349 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:10,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:10,349 INFO L85 PathProgramCache]: Analyzing trace with hash -2130618993, now seen corresponding path program 6 times [2023-01-28 05:08:10,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:10,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646525853] [2023-01-28 05:08:10,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:10,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:10,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:10,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:10,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646525853] [2023-01-28 05:08:10,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646525853] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:10,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474195044] [2023-01-28 05:08:10,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:08:10,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:10,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:10,425 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:08:10,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 05:08:10,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 05:08:10,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:10,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 05:08:10,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:10,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:10,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474195044] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:10,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:10,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-28 05:08:10,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397146975] [2023-01-28 05:08:10,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:10,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 05:08:10,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:10,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 05:08:10,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-01-28 05:08:10,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:08:10,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 908 flow. Second operand has 16 states, 16 states have (on average 54.1875) internal successors, (867), 16 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:10,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:10,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:08:10,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:11,087 INFO L130 PetriNetUnfolder]: 687/1287 cut-off events. [2023-01-28 05:08:11,087 INFO L131 PetriNetUnfolder]: For 13096/13096 co-relation queries the response was YES. [2023-01-28 05:08:11,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7926 conditions, 1287 events. 687/1287 cut-off events. For 13096/13096 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 7134 event pairs, 10 based on Foata normal form. 24/1311 useless extension candidates. Maximal degree in co-relation 5227. Up to 385 conditions per place. [2023-01-28 05:08:11,096 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 106 selfloop transitions, 137 changer transitions 16/259 dead transitions. [2023-01-28 05:08:11,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 259 transitions, 3265 flow [2023-01-28 05:08:11,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-28 05:08:11,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-28 05:08:11,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1425 transitions. [2023-01-28 05:08:11,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41605839416058393 [2023-01-28 05:08:11,099 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1425 transitions. [2023-01-28 05:08:11,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1425 transitions. [2023-01-28 05:08:11,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:11,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1425 transitions. [2023-01-28 05:08:11,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 57.0) internal successors, (1425), 25 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:11,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 137.0) internal successors, (3562), 26 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:11,105 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 137.0) internal successors, (3562), 26 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:11,105 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 908 flow. Second operand 25 states and 1425 transitions. [2023-01-28 05:08:11,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 259 transitions, 3265 flow [2023-01-28 05:08:11,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 259 transitions, 3233 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-01-28 05:08:11,128 INFO L231 Difference]: Finished difference. Result has 108 places, 171 transitions, 2489 flow [2023-01-28 05:08:11,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2489, PETRI_PLACES=108, PETRI_TRANSITIONS=171} [2023-01-28 05:08:11,128 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 88 predicate places. [2023-01-28 05:08:11,128 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 171 transitions, 2489 flow [2023-01-28 05:08:11,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.1875) internal successors, (867), 16 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:11,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:11,129 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:11,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:11,333 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 [2023-01-28 05:08:11,334 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:11,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:11,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1283699093, now seen corresponding path program 7 times [2023-01-28 05:08:11,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:11,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253310783] [2023-01-28 05:08:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:11,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:11,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:11,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253310783] [2023-01-28 05:08:11,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253310783] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:11,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853133534] [2023-01-28 05:08:11,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:08:11,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:11,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:11,419 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:08:11,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 05:08:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:11,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 05:08:11,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:11,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:11,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853133534] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:11,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:11,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-28 05:08:11,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231352666] [2023-01-28 05:08:11,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:11,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 05:08:11,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:11,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 05:08:11,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-01-28 05:08:11,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:08:11,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 171 transitions, 2489 flow. Second operand has 16 states, 16 states have (on average 54.4375) internal successors, (871), 16 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:11,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:11,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:08:11,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:12,078 INFO L130 PetriNetUnfolder]: 599/1177 cut-off events. [2023-01-28 05:08:12,078 INFO L131 PetriNetUnfolder]: For 25200/25200 co-relation queries the response was YES. [2023-01-28 05:08:12,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8641 conditions, 1177 events. 599/1177 cut-off events. For 25200/25200 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6786 event pairs, 37 based on Foata normal form. 56/1233 useless extension candidates. Maximal degree in co-relation 8462. Up to 334 conditions per place. [2023-01-28 05:08:12,087 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 101 selfloop transitions, 130 changer transitions 10/241 dead transitions. [2023-01-28 05:08:12,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 241 transitions, 3509 flow [2023-01-28 05:08:12,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 05:08:12,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 05:08:12,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1262 transitions. [2023-01-28 05:08:12,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41871267418712677 [2023-01-28 05:08:12,091 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1262 transitions. [2023-01-28 05:08:12,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1262 transitions. [2023-01-28 05:08:12,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:12,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1262 transitions. [2023-01-28 05:08:12,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 57.36363636363637) internal successors, (1262), 22 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:12,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 137.0) internal successors, (3151), 23 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:12,098 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 137.0) internal successors, (3151), 23 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:12,098 INFO L175 Difference]: Start difference. First operand has 108 places, 171 transitions, 2489 flow. Second operand 22 states and 1262 transitions. [2023-01-28 05:08:12,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 241 transitions, 3509 flow [2023-01-28 05:08:12,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 241 transitions, 3109 flow, removed 194 selfloop flow, removed 5 redundant places. [2023-01-28 05:08:12,150 INFO L231 Difference]: Finished difference. Result has 126 places, 168 transitions, 2457 flow [2023-01-28 05:08:12,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2457, PETRI_PLACES=126, PETRI_TRANSITIONS=168} [2023-01-28 05:08:12,151 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 106 predicate places. [2023-01-28 05:08:12,151 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 168 transitions, 2457 flow [2023-01-28 05:08:12,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.4375) internal successors, (871), 16 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:12,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:12,152 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:12,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:12,356 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 [2023-01-28 05:08:12,357 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:12,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:12,357 INFO L85 PathProgramCache]: Analyzing trace with hash 465738203, now seen corresponding path program 8 times [2023-01-28 05:08:12,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:12,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123926458] [2023-01-28 05:08:12,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:12,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:12,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:12,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:12,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123926458] [2023-01-28 05:08:12,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123926458] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:12,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835682707] [2023-01-28 05:08:12,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:08:12,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:12,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:12,450 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:08:12,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 05:08:12,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:08:12,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:12,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 05:08:12,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:12,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:12,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835682707] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:12,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:12,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-28 05:08:12,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324989781] [2023-01-28 05:08:12,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:12,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 05:08:12,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:12,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 05:08:12,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-01-28 05:08:12,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:08:12,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 168 transitions, 2457 flow. Second operand has 18 states, 18 states have (on average 54.388888888888886) internal successors, (979), 18 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:12,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:12,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:08:12,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:13,164 INFO L130 PetriNetUnfolder]: 764/1554 cut-off events. [2023-01-28 05:08:13,164 INFO L131 PetriNetUnfolder]: For 41948/41948 co-relation queries the response was YES. [2023-01-28 05:08:13,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11238 conditions, 1554 events. 764/1554 cut-off events. For 41948/41948 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9726 event pairs, 119 based on Foata normal form. 96/1650 useless extension candidates. Maximal degree in co-relation 9527. Up to 969 conditions per place. [2023-01-28 05:08:13,176 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 189 selfloop transitions, 87 changer transitions 8/284 dead transitions. [2023-01-28 05:08:13,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 284 transitions, 4327 flow [2023-01-28 05:08:13,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 05:08:13,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 05:08:13,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1155 transitions. [2023-01-28 05:08:13,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4215328467153285 [2023-01-28 05:08:13,180 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1155 transitions. [2023-01-28 05:08:13,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1155 transitions. [2023-01-28 05:08:13,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:13,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1155 transitions. [2023-01-28 05:08:13,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.75) internal successors, (1155), 20 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:13,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 137.0) internal successors, (2877), 21 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:13,185 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 137.0) internal successors, (2877), 21 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:13,185 INFO L175 Difference]: Start difference. First operand has 126 places, 168 transitions, 2457 flow. Second operand 20 states and 1155 transitions. [2023-01-28 05:08:13,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 284 transitions, 4327 flow [2023-01-28 05:08:13,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 284 transitions, 4218 flow, removed 13 selfloop flow, removed 11 redundant places. [2023-01-28 05:08:13,250 INFO L231 Difference]: Finished difference. Result has 140 places, 210 transitions, 3396 flow [2023-01-28 05:08:13,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=2352, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3396, PETRI_PLACES=140, PETRI_TRANSITIONS=210} [2023-01-28 05:08:13,251 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 120 predicate places. [2023-01-28 05:08:13,251 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 210 transitions, 3396 flow [2023-01-28 05:08:13,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.388888888888886) internal successors, (979), 18 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:13,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:13,251 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:13,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:13,456 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 [2023-01-28 05:08:13,456 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:13,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:13,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2109457573, now seen corresponding path program 9 times [2023-01-28 05:08:13,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:13,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593187742] [2023-01-28 05:08:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:13,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:13,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:13,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593187742] [2023-01-28 05:08:13,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593187742] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:13,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260049441] [2023-01-28 05:08:13,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:08:13,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:13,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:13,545 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) [2023-01-28 05:08:13,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 05:08:13,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 05:08:13,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:13,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 05:08:13,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:13,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:13,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260049441] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:13,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:13,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-01-28 05:08:13,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536225826] [2023-01-28 05:08:13,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:13,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 05:08:13,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:13,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 05:08:13,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-01-28 05:08:13,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:08:13,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 210 transitions, 3396 flow. Second operand has 16 states, 16 states have (on average 54.25) internal successors, (868), 16 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:13,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:13,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:08:13,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:14,147 INFO L130 PetriNetUnfolder]: 756/1536 cut-off events. [2023-01-28 05:08:14,147 INFO L131 PetriNetUnfolder]: For 43638/43638 co-relation queries the response was YES. [2023-01-28 05:08:14,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12568 conditions, 1536 events. 756/1536 cut-off events. For 43638/43638 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 9681 event pairs, 25 based on Foata normal form. 8/1544 useless extension candidates. Maximal degree in co-relation 10773. Up to 468 conditions per place. [2023-01-28 05:08:14,162 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 153 selfloop transitions, 120 changer transitions 9/282 dead transitions. [2023-01-28 05:08:14,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 282 transitions, 4856 flow [2023-01-28 05:08:14,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 05:08:14,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 05:08:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1135 transitions. [2023-01-28 05:08:14,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142335766423358 [2023-01-28 05:08:14,164 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1135 transitions. [2023-01-28 05:08:14,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1135 transitions. [2023-01-28 05:08:14,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:14,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1135 transitions. [2023-01-28 05:08:14,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 56.75) internal successors, (1135), 20 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:14,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 137.0) internal successors, (2877), 21 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:14,172 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 137.0) internal successors, (2877), 21 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:14,172 INFO L175 Difference]: Start difference. First operand has 140 places, 210 transitions, 3396 flow. Second operand 20 states and 1135 transitions. [2023-01-28 05:08:14,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 282 transitions, 4856 flow [2023-01-28 05:08:14,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 282 transitions, 4488 flow, removed 152 selfloop flow, removed 10 redundant places. [2023-01-28 05:08:14,261 INFO L231 Difference]: Finished difference. Result has 153 places, 224 transitions, 3656 flow [2023-01-28 05:08:14,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=3070, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3656, PETRI_PLACES=153, PETRI_TRANSITIONS=224} [2023-01-28 05:08:14,262 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 133 predicate places. [2023-01-28 05:08:14,262 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 224 transitions, 3656 flow [2023-01-28 05:08:14,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 54.25) internal successors, (868), 16 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:14,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:14,263 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:14,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:14,469 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 [2023-01-28 05:08:14,470 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:14,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:14,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1117413703, now seen corresponding path program 10 times [2023-01-28 05:08:14,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:14,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362539327] [2023-01-28 05:08:14,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:14,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:14,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:14,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362539327] [2023-01-28 05:08:14,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362539327] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:14,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363090731] [2023-01-28 05:08:14,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:08:14,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:14,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:14,595 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) [2023-01-28 05:08:14,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 05:08:14,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:08:14,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:14,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 05:08:14,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:08:14,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:08:14,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363090731] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:14,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:14,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 13 [2023-01-28 05:08:14,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186870037] [2023-01-28 05:08:14,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:14,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 05:08:14,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:14,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 05:08:14,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-01-28 05:08:14,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:08:14,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 224 transitions, 3656 flow. Second operand has 14 states, 14 states have (on average 54.642857142857146) internal successors, (765), 14 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:14,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:14,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:08:14,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:15,248 INFO L130 PetriNetUnfolder]: 803/1611 cut-off events. [2023-01-28 05:08:15,248 INFO L131 PetriNetUnfolder]: For 63986/63986 co-relation queries the response was YES. [2023-01-28 05:08:15,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13527 conditions, 1611 events. 803/1611 cut-off events. For 63986/63986 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 10101 event pairs, 33 based on Foata normal form. 46/1657 useless extension candidates. Maximal degree in co-relation 11549. Up to 407 conditions per place. [2023-01-28 05:08:15,266 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 167 selfloop transitions, 136 changer transitions 52/355 dead transitions. [2023-01-28 05:08:15,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 355 transitions, 5940 flow [2023-01-28 05:08:15,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 05:08:15,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 05:08:15,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1710 transitions. [2023-01-28 05:08:15,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41605839416058393 [2023-01-28 05:08:15,268 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1710 transitions. [2023-01-28 05:08:15,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1710 transitions. [2023-01-28 05:08:15,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:15,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1710 transitions. [2023-01-28 05:08:15,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 57.0) internal successors, (1710), 30 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:15,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 137.0) internal successors, (4247), 31 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:15,275 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 137.0) internal successors, (4247), 31 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:15,276 INFO L175 Difference]: Start difference. First operand has 153 places, 224 transitions, 3656 flow. Second operand 30 states and 1710 transitions. [2023-01-28 05:08:15,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 355 transitions, 5940 flow [2023-01-28 05:08:15,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 355 transitions, 5667 flow, removed 111 selfloop flow, removed 6 redundant places. [2023-01-28 05:08:15,404 INFO L231 Difference]: Finished difference. Result has 185 places, 250 transitions, 4313 flow [2023-01-28 05:08:15,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=3475, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4313, PETRI_PLACES=185, PETRI_TRANSITIONS=250} [2023-01-28 05:08:15,404 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 165 predicate places. [2023-01-28 05:08:15,404 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 250 transitions, 4313 flow [2023-01-28 05:08:15,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 54.642857142857146) internal successors, (765), 14 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:15,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:15,405 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:15,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:15,609 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 [2023-01-28 05:08:15,609 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:15,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:15,610 INFO L85 PathProgramCache]: Analyzing trace with hash 715119095, now seen corresponding path program 11 times [2023-01-28 05:08:15,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:15,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594835502] [2023-01-28 05:08:15,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:15,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:15,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:15,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594835502] [2023-01-28 05:08:15,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594835502] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:15,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158709576] [2023-01-28 05:08:15,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:08:15,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:15,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:15,713 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) [2023-01-28 05:08:15,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 05:08:15,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 05:08:15,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:15,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 05:08:15,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:15,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:16,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158709576] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:16,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:16,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-01-28 05:08:16,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218331870] [2023-01-28 05:08:16,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:16,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 05:08:16,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:16,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 05:08:16,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2023-01-28 05:08:16,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:08:16,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 250 transitions, 4313 flow. Second operand has 25 states, 25 states have (on average 53.8) internal successors, (1345), 25 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:16,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:16,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:08:16,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:17,416 INFO L130 PetriNetUnfolder]: 1235/2432 cut-off events. [2023-01-28 05:08:17,416 INFO L131 PetriNetUnfolder]: For 178071/178071 co-relation queries the response was YES. [2023-01-28 05:08:17,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25740 conditions, 2432 events. 1235/2432 cut-off events. For 178071/178071 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 16197 event pairs, 10 based on Foata normal form. 38/2470 useless extension candidates. Maximal degree in co-relation 24794. Up to 639 conditions per place. [2023-01-28 05:08:17,465 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 208 selfloop transitions, 385 changer transitions 17/610 dead transitions. [2023-01-28 05:08:17,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 610 transitions, 11431 flow [2023-01-28 05:08:17,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-01-28 05:08:17,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-01-28 05:08:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2934 transitions. [2023-01-28 05:08:17,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199227136109918 [2023-01-28 05:08:17,476 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2934 transitions. [2023-01-28 05:08:17,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2934 transitions. [2023-01-28 05:08:17,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:17,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2934 transitions. [2023-01-28 05:08:17,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 57.529411764705884) internal successors, (2934), 51 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:17,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 137.0) internal successors, (7124), 52 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:17,488 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 137.0) internal successors, (7124), 52 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:17,488 INFO L175 Difference]: Start difference. First operand has 185 places, 250 transitions, 4313 flow. Second operand 51 states and 2934 transitions. [2023-01-28 05:08:17,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 610 transitions, 11431 flow [2023-01-28 05:08:17,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 610 transitions, 10906 flow, removed 194 selfloop flow, removed 10 redundant places. [2023-01-28 05:08:17,707 INFO L231 Difference]: Finished difference. Result has 226 places, 442 transitions, 9865 flow [2023-01-28 05:08:17,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=4078, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=9865, PETRI_PLACES=226, PETRI_TRANSITIONS=442} [2023-01-28 05:08:17,707 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 206 predicate places. [2023-01-28 05:08:17,707 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 442 transitions, 9865 flow [2023-01-28 05:08:17,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 53.8) internal successors, (1345), 25 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:17,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:17,708 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:17,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:17,912 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 [2023-01-28 05:08:17,913 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:17,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:17,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1058407358, now seen corresponding path program 12 times [2023-01-28 05:08:17,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:17,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643099898] [2023-01-28 05:08:17,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:17,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:18,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:18,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:18,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643099898] [2023-01-28 05:08:18,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643099898] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:18,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049456737] [2023-01-28 05:08:18,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:08:18,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:18,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:18,003 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) [2023-01-28 05:08:18,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 05:08:18,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 05:08:18,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:18,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2023-01-28 05:08:18,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:18,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:18,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049456737] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:18,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:18,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7] total 10 [2023-01-28 05:08:18,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009053705] [2023-01-28 05:08:18,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:18,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 05:08:18,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:18,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 05:08:18,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-01-28 05:08:18,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 137 [2023-01-28 05:08:18,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 442 transitions, 9865 flow. Second operand has 12 states, 12 states have (on average 65.58333333333333) internal successors, (787), 12 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:18,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:18,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 137 [2023-01-28 05:08:18,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:19,100 INFO L130 PetriNetUnfolder]: 1938/3770 cut-off events. [2023-01-28 05:08:19,100 INFO L131 PetriNetUnfolder]: For 282085/282089 co-relation queries the response was YES. [2023-01-28 05:08:19,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42742 conditions, 3770 events. 1938/3770 cut-off events. For 282085/282089 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 27206 event pairs, 168 based on Foata normal form. 7/3770 useless extension candidates. Maximal degree in co-relation 41840. Up to 1612 conditions per place. [2023-01-28 05:08:19,141 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 442 selfloop transitions, 257 changer transitions 28/736 dead transitions. [2023-01-28 05:08:19,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 736 transitions, 17988 flow [2023-01-28 05:08:19,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 05:08:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 05:08:19,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 435 transitions. [2023-01-28 05:08:19,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291970802919708 [2023-01-28 05:08:19,142 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 435 transitions. [2023-01-28 05:08:19,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 435 transitions. [2023-01-28 05:08:19,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:19,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 435 transitions. [2023-01-28 05:08:19,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 72.5) internal successors, (435), 6 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:19,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:19,144 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 137.0) internal successors, (959), 7 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:19,144 INFO L175 Difference]: Start difference. First operand has 226 places, 442 transitions, 9865 flow. Second operand 6 states and 435 transitions. [2023-01-28 05:08:19,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 736 transitions, 17988 flow [2023-01-28 05:08:20,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 736 transitions, 12584 flow, removed 2614 selfloop flow, removed 3 redundant places. [2023-01-28 05:08:20,790 INFO L231 Difference]: Finished difference. Result has 231 places, 588 transitions, 10758 flow [2023-01-28 05:08:20,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=7002, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10758, PETRI_PLACES=231, PETRI_TRANSITIONS=588} [2023-01-28 05:08:20,791 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 211 predicate places. [2023-01-28 05:08:20,791 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 588 transitions, 10758 flow [2023-01-28 05:08:20,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 65.58333333333333) internal successors, (787), 12 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:20,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:20,791 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:20,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:20,992 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 [2023-01-28 05:08:20,992 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:20,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:20,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1587282354, now seen corresponding path program 13 times [2023-01-28 05:08:20,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:20,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946152391] [2023-01-28 05:08:20,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:20,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:21,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:21,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946152391] [2023-01-28 05:08:21,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946152391] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:21,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619426356] [2023-01-28 05:08:21,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:08:21,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:21,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:21,089 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) [2023-01-28 05:08:21,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 05:08:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:21,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 05:08:21,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:21,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:21,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619426356] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:21,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:21,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-01-28 05:08:21,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423865335] [2023-01-28 05:08:21,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:21,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 05:08:21,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:21,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 05:08:21,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-01-28 05:08:21,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:08:21,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 588 transitions, 10758 flow. Second operand has 21 states, 21 states have (on average 54.19047619047619) internal successors, (1138), 21 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:21,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:21,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:08:21,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:22,535 INFO L130 PetriNetUnfolder]: 1896/3701 cut-off events. [2023-01-28 05:08:22,535 INFO L131 PetriNetUnfolder]: For 45867/45867 co-relation queries the response was YES. [2023-01-28 05:08:22,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26785 conditions, 3701 events. 1896/3701 cut-off events. For 45867/45867 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 26534 event pairs, 40 based on Foata normal form. 68/3769 useless extension candidates. Maximal degree in co-relation 26290. Up to 1102 conditions per place. [2023-01-28 05:08:22,650 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 217 selfloop transitions, 451 changer transitions 20/688 dead transitions. [2023-01-28 05:08:22,650 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 688 transitions, 13128 flow [2023-01-28 05:08:22,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 05:08:22,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 05:08:22,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1385 transitions. [2023-01-28 05:08:22,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212287104622871 [2023-01-28 05:08:22,652 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1385 transitions. [2023-01-28 05:08:22,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1385 transitions. [2023-01-28 05:08:22,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:22,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1385 transitions. [2023-01-28 05:08:22,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.708333333333336) internal successors, (1385), 24 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:22,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 137.0) internal successors, (3425), 25 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:22,658 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 137.0) internal successors, (3425), 25 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:22,658 INFO L175 Difference]: Start difference. First operand has 231 places, 588 transitions, 10758 flow. Second operand 24 states and 1385 transitions. [2023-01-28 05:08:22,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 688 transitions, 13128 flow [2023-01-28 05:08:22,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 688 transitions, 12939 flow, removed 90 selfloop flow, removed 2 redundant places. [2023-01-28 05:08:22,926 INFO L231 Difference]: Finished difference. Result has 248 places, 592 transitions, 11738 flow [2023-01-28 05:08:22,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=10528, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=433, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=11738, PETRI_PLACES=248, PETRI_TRANSITIONS=592} [2023-01-28 05:08:22,927 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 228 predicate places. [2023-01-28 05:08:22,927 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 592 transitions, 11738 flow [2023-01-28 05:08:22,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.19047619047619) internal successors, (1138), 21 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:22,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:22,928 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:22,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:23,132 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 [2023-01-28 05:08:23,132 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:23,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:23,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1502044534, now seen corresponding path program 14 times [2023-01-28 05:08:23,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:23,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539434869] [2023-01-28 05:08:23,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:23,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:23,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:23,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539434869] [2023-01-28 05:08:23,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539434869] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:23,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67931699] [2023-01-28 05:08:23,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:08:23,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:23,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:23,240 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) [2023-01-28 05:08:23,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 05:08:23,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:08:23,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:23,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 05:08:23,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:23,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:23,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:23,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67931699] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:23,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:23,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-01-28 05:08:23,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771802541] [2023-01-28 05:08:23,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:23,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 05:08:23,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:23,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 05:08:23,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2023-01-28 05:08:23,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:08:23,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 592 transitions, 11738 flow. Second operand has 22 states, 22 states have (on average 54.18181818181818) internal successors, (1192), 22 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:23,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:23,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:08:23,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:24,808 INFO L130 PetriNetUnfolder]: 2183/4264 cut-off events. [2023-01-28 05:08:24,808 INFO L131 PetriNetUnfolder]: For 58092/58092 co-relation queries the response was YES. [2023-01-28 05:08:24,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31312 conditions, 4264 events. 2183/4264 cut-off events. For 58092/58092 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 31626 event pairs, 51 based on Foata normal form. 104/4368 useless extension candidates. Maximal degree in co-relation 30827. Up to 1652 conditions per place. [2023-01-28 05:08:24,839 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 285 selfloop transitions, 513 changer transitions 4/802 dead transitions. [2023-01-28 05:08:24,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 802 transitions, 16001 flow [2023-01-28 05:08:24,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 05:08:24,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 05:08:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1497 transitions. [2023-01-28 05:08:24,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42026951151038744 [2023-01-28 05:08:24,841 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1497 transitions. [2023-01-28 05:08:24,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1497 transitions. [2023-01-28 05:08:24,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:24,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1497 transitions. [2023-01-28 05:08:24,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 57.57692307692308) internal successors, (1497), 26 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:24,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 137.0) internal successors, (3699), 27 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:24,845 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 137.0) internal successors, (3699), 27 states have internal predecessors, (3699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:24,845 INFO L175 Difference]: Start difference. First operand has 248 places, 592 transitions, 11738 flow. Second operand 26 states and 1497 transitions. [2023-01-28 05:08:24,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 802 transitions, 16001 flow [2023-01-28 05:08:25,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 802 transitions, 15806 flow, removed 21 selfloop flow, removed 14 redundant places. [2023-01-28 05:08:25,189 INFO L231 Difference]: Finished difference. Result has 270 places, 680 transitions, 14937 flow [2023-01-28 05:08:25,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=11572, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=426, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=14937, PETRI_PLACES=270, PETRI_TRANSITIONS=680} [2023-01-28 05:08:25,189 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 250 predicate places. [2023-01-28 05:08:25,190 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 680 transitions, 14937 flow [2023-01-28 05:08:25,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.18181818181818) internal successors, (1192), 22 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:25,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:25,190 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:25,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:25,394 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 [2023-01-28 05:08:25,394 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:25,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:25,394 INFO L85 PathProgramCache]: Analyzing trace with hash 2011961230, now seen corresponding path program 15 times [2023-01-28 05:08:25,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:25,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26883932] [2023-01-28 05:08:25,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:25,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:25,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:25,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26883932] [2023-01-28 05:08:25,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26883932] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:25,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094535281] [2023-01-28 05:08:25,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:08:25,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:25,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:25,501 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) [2023-01-28 05:08:25,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 05:08:25,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 05:08:25,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:25,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 05:08:25,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:25,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:25,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:25,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094535281] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:25,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:25,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-01-28 05:08:25,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296304182] [2023-01-28 05:08:25,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:25,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 05:08:25,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:25,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 05:08:25,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2023-01-28 05:08:25,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:08:25,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 680 transitions, 14937 flow. Second operand has 22 states, 22 states have (on average 54.18181818181818) internal successors, (1192), 22 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:25,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:25,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:08:25,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:27,507 INFO L130 PetriNetUnfolder]: 2307/4500 cut-off events. [2023-01-28 05:08:27,507 INFO L131 PetriNetUnfolder]: For 80936/80936 co-relation queries the response was YES. [2023-01-28 05:08:27,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36057 conditions, 4500 events. 2307/4500 cut-off events. For 80936/80936 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 33669 event pairs, 7 based on Foata normal form. 76/4576 useless extension candidates. Maximal degree in co-relation 35504. Up to 905 conditions per place. [2023-01-28 05:08:27,539 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 276 selfloop transitions, 604 changer transitions 11/891 dead transitions. [2023-01-28 05:08:27,539 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 891 transitions, 19573 flow [2023-01-28 05:08:27,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 05:08:27,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 05:08:27,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1833 transitions. [2023-01-28 05:08:27,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41811131386861317 [2023-01-28 05:08:27,541 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1833 transitions. [2023-01-28 05:08:27,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1833 transitions. [2023-01-28 05:08:27,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:27,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1833 transitions. [2023-01-28 05:08:27,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.28125) internal successors, (1833), 32 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:27,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 137.0) internal successors, (4521), 33 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:27,546 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 137.0) internal successors, (4521), 33 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:27,546 INFO L175 Difference]: Start difference. First operand has 270 places, 680 transitions, 14937 flow. Second operand 32 states and 1833 transitions. [2023-01-28 05:08:27,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 891 transitions, 19573 flow [2023-01-28 05:08:28,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 891 transitions, 19349 flow, removed 84 selfloop flow, removed 8 redundant places. [2023-01-28 05:08:28,066 INFO L231 Difference]: Finished difference. Result has 296 places, 754 transitions, 17585 flow [2023-01-28 05:08:28,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=14731, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=528, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=17585, PETRI_PLACES=296, PETRI_TRANSITIONS=754} [2023-01-28 05:08:28,067 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 276 predicate places. [2023-01-28 05:08:28,067 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 754 transitions, 17585 flow [2023-01-28 05:08:28,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.18181818181818) internal successors, (1192), 22 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:28,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:28,068 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:28,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:28,268 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 [2023-01-28 05:08:28,268 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:28,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:28,269 INFO L85 PathProgramCache]: Analyzing trace with hash 295045338, now seen corresponding path program 16 times [2023-01-28 05:08:28,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:28,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823903797] [2023-01-28 05:08:28,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:28,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:28,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:28,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823903797] [2023-01-28 05:08:28,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823903797] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:28,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582567774] [2023-01-28 05:08:28,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:08:28,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:28,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:28,360 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) [2023-01-28 05:08:28,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 05:08:28,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:08:28,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:28,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 05:08:28,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:28,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:28,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:28,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582567774] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:28,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:28,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-01-28 05:08:28,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953720376] [2023-01-28 05:08:28,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:28,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 05:08:28,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:28,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 05:08:28,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-01-28 05:08:28,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:08:28,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 754 transitions, 17585 flow. Second operand has 20 states, 20 states have (on average 53.75) internal successors, (1075), 20 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:28,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:28,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:08:28,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:30,406 INFO L130 PetriNetUnfolder]: 2667/5269 cut-off events. [2023-01-28 05:08:30,406 INFO L131 PetriNetUnfolder]: For 105280/105280 co-relation queries the response was YES. [2023-01-28 05:08:30,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44006 conditions, 5269 events. 2667/5269 cut-off events. For 105280/105280 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 41141 event pairs, 55 based on Foata normal form. 90/5359 useless extension candidates. Maximal degree in co-relation 43434. Up to 1397 conditions per place. [2023-01-28 05:08:30,444 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 462 selfloop transitions, 562 changer transitions 17/1041 dead transitions. [2023-01-28 05:08:30,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 1041 transitions, 23867 flow [2023-01-28 05:08:30,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-28 05:08:30,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-28 05:08:30,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2181 transitions. [2023-01-28 05:08:30,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4189396849788705 [2023-01-28 05:08:30,447 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2181 transitions. [2023-01-28 05:08:30,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2181 transitions. [2023-01-28 05:08:30,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:30,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2181 transitions. [2023-01-28 05:08:30,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 57.39473684210526) internal successors, (2181), 38 states have internal predecessors, (2181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:30,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 137.0) internal successors, (5343), 39 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:30,452 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 137.0) internal successors, (5343), 39 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:30,452 INFO L175 Difference]: Start difference. First operand has 296 places, 754 transitions, 17585 flow. Second operand 38 states and 2181 transitions. [2023-01-28 05:08:30,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 1041 transitions, 23867 flow [2023-01-28 05:08:31,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 1041 transitions, 22444 flow, removed 216 selfloop flow, removed 16 redundant places. [2023-01-28 05:08:31,150 INFO L231 Difference]: Finished difference. Result has 325 places, 861 transitions, 20641 flow [2023-01-28 05:08:31,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=16332, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=457, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=20641, PETRI_PLACES=325, PETRI_TRANSITIONS=861} [2023-01-28 05:08:31,150 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 305 predicate places. [2023-01-28 05:08:31,150 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 861 transitions, 20641 flow [2023-01-28 05:08:31,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.75) internal successors, (1075), 20 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:31,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:31,151 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:31,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:31,353 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 [2023-01-28 05:08:31,353 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:31,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:31,353 INFO L85 PathProgramCache]: Analyzing trace with hash 344505820, now seen corresponding path program 17 times [2023-01-28 05:08:31,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:31,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511127438] [2023-01-28 05:08:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:31,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:31,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:31,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511127438] [2023-01-28 05:08:31,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511127438] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:31,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573762284] [2023-01-28 05:08:31,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:08:31,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:31,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:31,463 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) [2023-01-28 05:08:31,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 05:08:31,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 05:08:31,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:31,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 05:08:31,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:31,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:31,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573762284] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:31,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:31,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-01-28 05:08:31,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793589600] [2023-01-28 05:08:31,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:31,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 05:08:31,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:31,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 05:08:31,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-01-28 05:08:31,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:08:31,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 861 transitions, 20641 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:31,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:31,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:08:31,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:34,022 INFO L130 PetriNetUnfolder]: 3133/6126 cut-off events. [2023-01-28 05:08:34,022 INFO L131 PetriNetUnfolder]: For 134558/134558 co-relation queries the response was YES. [2023-01-28 05:08:34,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52873 conditions, 6126 events. 3133/6126 cut-off events. For 134558/134558 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 48990 event pairs, 79 based on Foata normal form. 56/6182 useless extension candidates. Maximal degree in co-relation 52220. Up to 3060 conditions per place. [2023-01-28 05:08:34,064 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 494 selfloop transitions, 657 changer transitions 15/1166 dead transitions. [2023-01-28 05:08:34,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1166 transitions, 28460 flow [2023-01-28 05:08:34,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 05:08:34,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 05:08:34,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1613 transitions. [2023-01-28 05:08:34,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4204900938477581 [2023-01-28 05:08:34,066 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1613 transitions. [2023-01-28 05:08:34,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1613 transitions. [2023-01-28 05:08:34,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:34,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1613 transitions. [2023-01-28 05:08:34,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 57.607142857142854) internal successors, (1613), 28 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:34,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 137.0) internal successors, (3973), 29 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:34,071 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 137.0) internal successors, (3973), 29 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:34,071 INFO L175 Difference]: Start difference. First operand has 325 places, 861 transitions, 20641 flow. Second operand 28 states and 1613 transitions. [2023-01-28 05:08:34,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 1166 transitions, 28460 flow [2023-01-28 05:08:35,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1166 transitions, 27809 flow, removed 143 selfloop flow, removed 25 redundant places. [2023-01-28 05:08:35,074 INFO L231 Difference]: Finished difference. Result has 338 places, 1024 transitions, 26136 flow [2023-01-28 05:08:35,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=20148, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=861, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=503, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=26136, PETRI_PLACES=338, PETRI_TRANSITIONS=1024} [2023-01-28 05:08:35,075 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 318 predicate places. [2023-01-28 05:08:35,075 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 1024 transitions, 26136 flow [2023-01-28 05:08:35,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:35,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:35,075 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:35,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:35,279 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 [2023-01-28 05:08:35,280 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:35,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:35,280 INFO L85 PathProgramCache]: Analyzing trace with hash -764395770, now seen corresponding path program 18 times [2023-01-28 05:08:35,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:35,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247962038] [2023-01-28 05:08:35,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:35,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:35,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:35,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247962038] [2023-01-28 05:08:35,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247962038] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:35,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177808057] [2023-01-28 05:08:35,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:08:35,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:35,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:35,371 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) [2023-01-28 05:08:35,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 05:08:35,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 05:08:35,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:35,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 05:08:35,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:35,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:35,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177808057] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:35,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:35,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-01-28 05:08:35,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337406989] [2023-01-28 05:08:35,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:35,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 05:08:35,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:35,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 05:08:35,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-01-28 05:08:35,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:08:35,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 1024 transitions, 26136 flow. Second operand has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:35,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:35,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:08:35,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:38,512 INFO L130 PetriNetUnfolder]: 3703/7260 cut-off events. [2023-01-28 05:08:38,512 INFO L131 PetriNetUnfolder]: For 189224/189224 co-relation queries the response was YES. [2023-01-28 05:08:38,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66462 conditions, 7260 events. 3703/7260 cut-off events. For 189224/189224 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 59810 event pairs, 105 based on Foata normal form. 168/7428 useless extension candidates. Maximal degree in co-relation 65752. Up to 2424 conditions per place. [2023-01-28 05:08:38,572 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 432 selfloop transitions, 909 changer transitions 20/1361 dead transitions. [2023-01-28 05:08:38,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1361 transitions, 35664 flow [2023-01-28 05:08:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 05:08:38,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 05:08:38,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1778 transitions. [2023-01-28 05:08:38,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186484577348717 [2023-01-28 05:08:38,574 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1778 transitions. [2023-01-28 05:08:38,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1778 transitions. [2023-01-28 05:08:38,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:38,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1778 transitions. [2023-01-28 05:08:38,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 57.354838709677416) internal successors, (1778), 31 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:38,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 137.0) internal successors, (4384), 32 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:38,579 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 137.0) internal successors, (4384), 32 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:38,579 INFO L175 Difference]: Start difference. First operand has 338 places, 1024 transitions, 26136 flow. Second operand 31 states and 1778 transitions. [2023-01-28 05:08:38,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1361 transitions, 35664 flow [2023-01-28 05:08:40,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1361 transitions, 35350 flow, removed 133 selfloop flow, removed 7 redundant places. [2023-01-28 05:08:40,442 INFO L231 Difference]: Finished difference. Result has 369 places, 1213 transitions, 33651 flow [2023-01-28 05:08:40,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=25837, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1023, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=723, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=33651, PETRI_PLACES=369, PETRI_TRANSITIONS=1213} [2023-01-28 05:08:40,443 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 349 predicate places. [2023-01-28 05:08:40,443 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1213 transitions, 33651 flow [2023-01-28 05:08:40,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.130434782608695) internal successors, (1245), 23 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:40,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:40,443 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:40,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:40,648 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 [2023-01-28 05:08:40,648 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:40,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:40,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1978622190, now seen corresponding path program 19 times [2023-01-28 05:08:40,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:40,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439807398] [2023-01-28 05:08:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:40,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:40,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:40,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439807398] [2023-01-28 05:08:40,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439807398] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:40,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035568749] [2023-01-28 05:08:40,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:08:40,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:40,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:40,777 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) [2023-01-28 05:08:40,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 05:08:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:40,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-28 05:08:40,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:40,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:41,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:08:41,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035568749] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:41,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:41,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-01-28 05:08:41,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147433038] [2023-01-28 05:08:41,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:41,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 05:08:41,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:41,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 05:08:41,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-01-28 05:08:41,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:08:41,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1213 transitions, 33651 flow. Second operand has 22 states, 22 states have (on average 53.90909090909091) internal successors, (1186), 22 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:41,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:41,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:08:41,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:44,220 INFO L130 PetriNetUnfolder]: 4062/8012 cut-off events. [2023-01-28 05:08:44,220 INFO L131 PetriNetUnfolder]: For 244787/244787 co-relation queries the response was YES. [2023-01-28 05:08:44,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78412 conditions, 8012 events. 4062/8012 cut-off events. For 244787/244787 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 67551 event pairs, 305 based on Foata normal form. 136/8148 useless extension candidates. Maximal degree in co-relation 77443. Up to 6222 conditions per place. [2023-01-28 05:08:44,294 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 1169 selfloop transitions, 271 changer transitions 17/1457 dead transitions. [2023-01-28 05:08:44,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1457 transitions, 41399 flow [2023-01-28 05:08:44,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 05:08:44,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 05:08:44,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1612 transitions. [2023-01-28 05:08:44,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42022940563086547 [2023-01-28 05:08:44,296 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1612 transitions. [2023-01-28 05:08:44,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1612 transitions. [2023-01-28 05:08:44,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:44,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1612 transitions. [2023-01-28 05:08:44,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 57.57142857142857) internal successors, (1612), 28 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:44,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 137.0) internal successors, (3973), 29 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:44,300 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 137.0) internal successors, (3973), 29 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:44,300 INFO L175 Difference]: Start difference. First operand has 369 places, 1213 transitions, 33651 flow. Second operand 28 states and 1612 transitions. [2023-01-28 05:08:44,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1457 transitions, 41399 flow [2023-01-28 05:08:46,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 1457 transitions, 40967 flow, removed 173 selfloop flow, removed 13 redundant places. [2023-01-28 05:08:46,643 INFO L231 Difference]: Finished difference. Result has 393 places, 1327 transitions, 37600 flow [2023-01-28 05:08:46,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=33219, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=993, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=37600, PETRI_PLACES=393, PETRI_TRANSITIONS=1327} [2023-01-28 05:08:46,643 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 373 predicate places. [2023-01-28 05:08:46,644 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 1327 transitions, 37600 flow [2023-01-28 05:08:46,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.90909090909091) internal successors, (1186), 22 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:46,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:46,644 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:46,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:46,848 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 [2023-01-28 05:08:46,848 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:46,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:46,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1120342306, now seen corresponding path program 20 times [2023-01-28 05:08:46,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:46,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585100349] [2023-01-28 05:08:46,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:46,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:46,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:46,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585100349] [2023-01-28 05:08:46,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585100349] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:46,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462192824] [2023-01-28 05:08:46,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:08:46,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:46,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:46,943 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) [2023-01-28 05:08:46,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 05:08:46,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:08:46,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:46,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-28 05:08:46,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:47,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:47,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:47,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462192824] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:47,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:47,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-01-28 05:08:47,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465305410] [2023-01-28 05:08:47,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:47,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 05:08:47,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:47,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 05:08:47,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2023-01-28 05:08:47,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:08:47,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 1327 transitions, 37600 flow. Second operand has 22 states, 22 states have (on average 53.90909090909091) internal successors, (1186), 22 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:47,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:47,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:08:47,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:51,093 INFO L130 PetriNetUnfolder]: 3993/7827 cut-off events. [2023-01-28 05:08:51,093 INFO L131 PetriNetUnfolder]: For 248638/248638 co-relation queries the response was YES. [2023-01-28 05:08:51,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77771 conditions, 7827 events. 3993/7827 cut-off events. For 248638/248638 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 65373 event pairs, 49 based on Foata normal form. 18/7845 useless extension candidates. Maximal degree in co-relation 76868. Up to 2303 conditions per place. [2023-01-28 05:08:51,167 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 807 selfloop transitions, 610 changer transitions 15/1432 dead transitions. [2023-01-28 05:08:51,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 1432 transitions, 41327 flow [2023-01-28 05:08:51,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 05:08:51,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-28 05:08:51,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1868 transitions. [2023-01-28 05:08:51,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131829241318292 [2023-01-28 05:08:51,169 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1868 transitions. [2023-01-28 05:08:51,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1868 transitions. [2023-01-28 05:08:51,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:51,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1868 transitions. [2023-01-28 05:08:51,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 56.60606060606061) internal successors, (1868), 33 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:51,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 137.0) internal successors, (4658), 34 states have internal predecessors, (4658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:51,174 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 137.0) internal successors, (4658), 34 states have internal predecessors, (4658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:51,174 INFO L175 Difference]: Start difference. First operand has 393 places, 1327 transitions, 37600 flow. Second operand 33 states and 1868 transitions. [2023-01-28 05:08:51,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 1432 transitions, 41327 flow [2023-01-28 05:08:53,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 1432 transitions, 40963 flow, removed 111 selfloop flow, removed 15 redundant places. [2023-01-28 05:08:53,539 INFO L231 Difference]: Finished difference. Result has 414 places, 1332 transitions, 38544 flow [2023-01-28 05:08:53,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=36823, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=594, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=38544, PETRI_PLACES=414, PETRI_TRANSITIONS=1332} [2023-01-28 05:08:53,540 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 394 predicate places. [2023-01-28 05:08:53,540 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 1332 transitions, 38544 flow [2023-01-28 05:08:53,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.90909090909091) internal successors, (1186), 22 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:53,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:53,541 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:53,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:53,741 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 [2023-01-28 05:08:53,741 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:53,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:53,742 INFO L85 PathProgramCache]: Analyzing trace with hash -198606537, now seen corresponding path program 21 times [2023-01-28 05:08:53,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:53,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940042687] [2023-01-28 05:08:53,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:53,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:53,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:53,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:53,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940042687] [2023-01-28 05:08:53,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940042687] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:53,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515048024] [2023-01-28 05:08:53,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:08:53,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:53,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:53,865 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) [2023-01-28 05:08:53,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 05:08:53,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 05:08:53,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:53,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-28 05:08:53,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:54,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:54,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515048024] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:54,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:54,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2023-01-28 05:08:54,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070442097] [2023-01-28 05:08:54,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:54,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 05:08:54,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:54,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 05:08:54,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=627, Unknown=0, NotChecked=0, Total=812 [2023-01-28 05:08:54,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:08:54,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 1332 transitions, 38544 flow. Second operand has 29 states, 29 states have (on average 53.96551724137931) internal successors, (1565), 29 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:54,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:54,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:08:54,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:59,972 INFO L130 PetriNetUnfolder]: 5093/10127 cut-off events. [2023-01-28 05:08:59,972 INFO L131 PetriNetUnfolder]: For 335973/335973 co-relation queries the response was YES. [2023-01-28 05:09:00,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102245 conditions, 10127 events. 5093/10127 cut-off events. For 335973/335973 co-relation queries the response was YES. Maximal size of possible extension queue 831. Compared 88862 event pairs, 11 based on Foata normal form. 180/10307 useless extension candidates. Maximal degree in co-relation 101503. Up to 2141 conditions per place. [2023-01-28 05:09:00,077 INFO L137 encePairwiseOnDemand]: 128/137 looper letters, 509 selfloop transitions, 1452 changer transitions 34/1995 dead transitions. [2023-01-28 05:09:00,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 1995 transitions, 55850 flow [2023-01-28 05:09:00,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-01-28 05:09:00,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-01-28 05:09:00,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3616 transitions. [2023-01-28 05:09:00,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41895492990383504 [2023-01-28 05:09:00,080 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3616 transitions. [2023-01-28 05:09:00,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3616 transitions. [2023-01-28 05:09:00,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:09:00,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3616 transitions. [2023-01-28 05:09:00,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 57.3968253968254) internal successors, (3616), 63 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:09:00,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 137.0) internal successors, (8768), 64 states have internal predecessors, (8768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:09:00,089 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 137.0) internal successors, (8768), 64 states have internal predecessors, (8768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:09:00,089 INFO L175 Difference]: Start difference. First operand has 414 places, 1332 transitions, 38544 flow. Second operand 63 states and 3616 transitions. [2023-01-28 05:09:00,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 1995 transitions, 55850 flow [2023-01-28 05:09:03,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 1995 transitions, 54757 flow, removed 126 selfloop flow, removed 16 redundant places. [2023-01-28 05:09:03,438 INFO L231 Difference]: Finished difference. Result has 472 places, 1687 transitions, 50830 flow [2023-01-28 05:09:03,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=37603, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=50830, PETRI_PLACES=472, PETRI_TRANSITIONS=1687} [2023-01-28 05:09:03,439 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 452 predicate places. [2023-01-28 05:09:03,439 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 1687 transitions, 50830 flow [2023-01-28 05:09:03,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 53.96551724137931) internal successors, (1565), 29 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:09:03,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:09:03,440 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:09:03,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-01-28 05:09:03,644 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 [2023-01-28 05:09:03,644 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:09:03,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:09:03,644 INFO L85 PathProgramCache]: Analyzing trace with hash 175450710, now seen corresponding path program 22 times [2023-01-28 05:09:03,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:09:03,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492473303] [2023-01-28 05:09:03,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:09:03,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:09:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:09:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:09:03,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:09:03,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492473303] [2023-01-28 05:09:03,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492473303] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:09:03,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543763412] [2023-01-28 05:09:03,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:09:03,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:09:03,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:09:03,763 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) [2023-01-28 05:09:03,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 05:09:03,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:09:03,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:09:03,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-28 05:09:03,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:09:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:09:03,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:09:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:09:03,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543763412] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:09:03,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:09:03,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 16 [2023-01-28 05:09:03,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645225049] [2023-01-28 05:09:03,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:09:03,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 05:09:03,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:09:03,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 05:09:03,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-01-28 05:09:03,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:09:03,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 1687 transitions, 50830 flow. Second operand has 17 states, 17 states have (on average 54.35294117647059) internal successors, (924), 17 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) [2023-01-28 05:09:03,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:09:03,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:09:03,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:09:09,158 INFO L130 PetriNetUnfolder]: 5147/10159 cut-off events. [2023-01-28 05:09:09,158 INFO L131 PetriNetUnfolder]: For 366730/366730 co-relation queries the response was YES. [2023-01-28 05:09:09,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109570 conditions, 10159 events. 5147/10159 cut-off events. For 366730/366730 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 88392 event pairs, 123 based on Foata normal form. 104/10263 useless extension candidates. Maximal degree in co-relation 108420. Up to 2922 conditions per place. [2023-01-28 05:09:09,289 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 966 selfloop transitions, 926 changer transitions 37/1929 dead transitions. [2023-01-28 05:09:09,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 1929 transitions, 58875 flow [2023-01-28 05:09:09,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-28 05:09:09,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-28 05:09:09,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2288 transitions. [2023-01-28 05:09:09,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41751824817518246 [2023-01-28 05:09:09,292 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2288 transitions. [2023-01-28 05:09:09,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2288 transitions. [2023-01-28 05:09:09,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:09:09,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2288 transitions. [2023-01-28 05:09:09,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 57.2) internal successors, (2288), 40 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:09:09,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 137.0) internal successors, (5617), 41 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:09:09,297 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 137.0) internal successors, (5617), 41 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:09:09,297 INFO L175 Difference]: Start difference. First operand has 472 places, 1687 transitions, 50830 flow. Second operand 40 states and 2288 transitions. [2023-01-28 05:09:09,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 1929 transitions, 58875 flow [2023-01-28 05:09:13,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 1929 transitions, 57886 flow, removed 399 selfloop flow, removed 18 redundant places. [2023-01-28 05:09:13,458 INFO L231 Difference]: Finished difference. Result has 506 places, 1780 transitions, 54982 flow [2023-01-28 05:09:13,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=49860, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=832, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=843, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=54982, PETRI_PLACES=506, PETRI_TRANSITIONS=1780} [2023-01-28 05:09:13,459 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 486 predicate places. [2023-01-28 05:09:13,459 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 1780 transitions, 54982 flow [2023-01-28 05:09:13,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 54.35294117647059) internal successors, (924), 17 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) [2023-01-28 05:09:13,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:09:13,459 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:09:13,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-01-28 05:09:13,660 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 [2023-01-28 05:09:13,661 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:09:13,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:09:13,661 INFO L85 PathProgramCache]: Analyzing trace with hash -844978902, now seen corresponding path program 23 times [2023-01-28 05:09:13,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:09:13,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543689747] [2023-01-28 05:09:13,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:09:13,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:09:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:09:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:09:13,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:09:13,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543689747] [2023-01-28 05:09:13,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543689747] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:09:13,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176793160] [2023-01-28 05:09:13,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:09:13,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:09:13,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:09:13,767 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) [2023-01-28 05:09:13,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 05:09:13,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-01-28 05:09:13,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:09:13,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 05:09:13,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:09:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:09:13,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:09:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:09:14,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176793160] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:09:14,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:09:14,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-01-28 05:09:14,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045615352] [2023-01-28 05:09:14,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:09:14,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 05:09:14,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:09:14,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 05:09:14,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-01-28 05:09:14,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:09:14,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 1780 transitions, 54982 flow. Second operand has 23 states, 23 states have (on average 53.65217391304348) internal successors, (1234), 23 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:09:14,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:09:14,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:09:14,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:09:20,985 INFO L130 PetriNetUnfolder]: 5828/11569 cut-off events. [2023-01-28 05:09:20,985 INFO L131 PetriNetUnfolder]: For 464965/464965 co-relation queries the response was YES. [2023-01-28 05:09:21,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128173 conditions, 11569 events. 5828/11569 cut-off events. For 464965/464965 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 102784 event pairs, 227 based on Foata normal form. 448/12017 useless extension candidates. Maximal degree in co-relation 127749. Up to 3242 conditions per place. [2023-01-28 05:09:21,111 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 750 selfloop transitions, 1405 changer transitions 35/2190 dead transitions. [2023-01-28 05:09:21,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 2190 transitions, 69908 flow [2023-01-28 05:09:21,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 05:09:21,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 05:09:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2001 transitions. [2023-01-28 05:09:21,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173096976016684 [2023-01-28 05:09:21,114 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2001 transitions. [2023-01-28 05:09:21,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2001 transitions. [2023-01-28 05:09:21,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:09:21,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2001 transitions. [2023-01-28 05:09:21,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 57.17142857142857) internal successors, (2001), 35 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:09:21,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 137.0) internal successors, (4932), 36 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:09:21,118 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 137.0) internal successors, (4932), 36 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:09:21,118 INFO L175 Difference]: Start difference. First operand has 506 places, 1780 transitions, 54982 flow. Second operand 35 states and 2001 transitions. [2023-01-28 05:09:21,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 2190 transitions, 69908 flow [2023-01-28 05:09:25,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 2190 transitions, 67715 flow, removed 249 selfloop flow, removed 13 redundant places. [2023-01-28 05:09:25,886 INFO L231 Difference]: Finished difference. Result has 532 places, 1996 transitions, 65679 flow [2023-01-28 05:09:25,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=53005, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=65679, PETRI_PLACES=532, PETRI_TRANSITIONS=1996} [2023-01-28 05:09:25,887 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 512 predicate places. [2023-01-28 05:09:25,887 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 1996 transitions, 65679 flow [2023-01-28 05:09:25,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.65217391304348) internal successors, (1234), 23 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:09:25,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:09:25,888 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:09:25,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-28 05:09:26,088 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 [2023-01-28 05:09:26,088 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:09:26,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:09:26,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1262507224, now seen corresponding path program 24 times [2023-01-28 05:09:26,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:09:26,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781674466] [2023-01-28 05:09:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:09:26,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:09:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:09:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:09:26,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:09:26,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781674466] [2023-01-28 05:09:26,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781674466] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:09:26,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030231464] [2023-01-28 05:09:26,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:09:26,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:09:26,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:09:26,189 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:09:26,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 05:09:26,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 05:09:26,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:09:26,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 05:09:26,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:09:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:09:26,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:09:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:09:26,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030231464] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:09:26,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:09:26,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-01-28 05:09:26,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846024218] [2023-01-28 05:09:26,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:09:26,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 05:09:26,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:09:26,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 05:09:26,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-01-28 05:09:26,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:09:26,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 1996 transitions, 65679 flow. Second operand has 24 states, 24 states have (on average 53.708333333333336) internal successors, (1289), 24 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) [2023-01-28 05:09:26,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:09:26,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:09:26,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:09:34,553 INFO L130 PetriNetUnfolder]: 6319/12549 cut-off events. [2023-01-28 05:09:34,554 INFO L131 PetriNetUnfolder]: For 547009/547009 co-relation queries the response was YES. [2023-01-28 05:09:34,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148021 conditions, 12549 events. 6319/12549 cut-off events. For 547009/547009 co-relation queries the response was YES. Maximal size of possible extension queue 952. Compared 112724 event pairs, 533 based on Foata normal form. 240/12789 useless extension candidates. Maximal degree in co-relation 147322. Up to 9914 conditions per place. [2023-01-28 05:09:34,714 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 1858 selfloop transitions, 433 changer transitions 18/2309 dead transitions. [2023-01-28 05:09:34,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 2309 transitions, 78847 flow [2023-01-28 05:09:34,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 05:09:34,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 05:09:34,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1385 transitions. [2023-01-28 05:09:34,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212287104622871 [2023-01-28 05:09:34,716 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1385 transitions. [2023-01-28 05:09:34,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1385 transitions. [2023-01-28 05:09:34,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:09:34,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1385 transitions. [2023-01-28 05:09:34,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.708333333333336) internal successors, (1385), 24 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:09:34,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 137.0) internal successors, (3425), 25 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:09:34,719 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 137.0) internal successors, (3425), 25 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:09:34,719 INFO L175 Difference]: Start difference. First operand has 532 places, 1996 transitions, 65679 flow. Second operand 24 states and 1385 transitions. [2023-01-28 05:09:34,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 2309 transitions, 78847 flow [2023-01-28 05:09:41,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 2309 transitions, 77988 flow, removed 348 selfloop flow, removed 14 redundant places. [2023-01-28 05:09:41,298 INFO L231 Difference]: Finished difference. Result has 552 places, 2179 transitions, 73089 flow [2023-01-28 05:09:41,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=64850, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1996, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=73089, PETRI_PLACES=552, PETRI_TRANSITIONS=2179} [2023-01-28 05:09:41,300 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 532 predicate places. [2023-01-28 05:09:41,300 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 2179 transitions, 73089 flow [2023-01-28 05:09:41,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.708333333333336) internal successors, (1289), 24 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) [2023-01-28 05:09:41,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:09:41,300 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:09:41,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-28 05:09:41,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-28 05:09:41,501 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:09:41,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:09:41,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1865710427, now seen corresponding path program 25 times [2023-01-28 05:09:41,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:09:41,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677445982] [2023-01-28 05:09:41,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:09:41,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:09:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:09:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:09:41,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:09:41,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677445982] [2023-01-28 05:09:41,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677445982] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:09:41,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582383276] [2023-01-28 05:09:41,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:09:41,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:09:41,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:09:41,644 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:09:41,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-28 05:09:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:09:41,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-28 05:09:41,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:09:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:09:41,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:09:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:09:42,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582383276] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:09:42,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:09:42,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-01-28 05:09:42,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497232395] [2023-01-28 05:09:42,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:09:42,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 05:09:42,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:09:42,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 05:09:42,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2023-01-28 05:09:42,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:09:42,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 2179 transitions, 73089 flow. Second operand has 26 states, 26 states have (on average 53.96153846153846) internal successors, (1403), 26 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:09:42,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:09:42,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:09:42,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:09:51,942 INFO L130 PetriNetUnfolder]: 7426/14580 cut-off events. [2023-01-28 05:09:51,942 INFO L131 PetriNetUnfolder]: For 646625/646625 co-relation queries the response was YES. [2023-01-28 05:09:52,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175183 conditions, 14580 events. 7426/14580 cut-off events. For 646625/646625 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 132510 event pairs, 104 based on Foata normal form. 66/14646 useless extension candidates. Maximal degree in co-relation 174260. Up to 4042 conditions per place. [2023-01-28 05:09:52,147 INFO L137 encePairwiseOnDemand]: 130/137 looper letters, 663 selfloop transitions, 2215 changer transitions 51/2929 dead transitions. [2023-01-28 05:09:52,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 2929 transitions, 98252 flow [2023-01-28 05:09:52,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 05:09:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 05:09:52,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1969 transitions. [2023-01-28 05:09:52,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.422713610991842 [2023-01-28 05:09:52,150 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1969 transitions. [2023-01-28 05:09:52,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1969 transitions. [2023-01-28 05:09:52,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:09:52,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1969 transitions. [2023-01-28 05:09:52,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 57.911764705882355) internal successors, (1969), 34 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:09:52,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 137.0) internal successors, (4795), 35 states have internal predecessors, (4795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:09:52,156 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 137.0) internal successors, (4795), 35 states have internal predecessors, (4795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:09:52,156 INFO L175 Difference]: Start difference. First operand has 552 places, 2179 transitions, 73089 flow. Second operand 34 states and 1969 transitions. [2023-01-28 05:09:52,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 2929 transitions, 98252 flow [2023-01-28 05:10:01,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 2929 transitions, 97725 flow, removed 227 selfloop flow, removed 10 redundant places. [2023-01-28 05:10:01,291 INFO L231 Difference]: Finished difference. Result has 583 places, 2543 transitions, 92010 flow [2023-01-28 05:10:01,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=72614, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1852, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=92010, PETRI_PLACES=583, PETRI_TRANSITIONS=2543} [2023-01-28 05:10:01,293 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 563 predicate places. [2023-01-28 05:10:01,293 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 2543 transitions, 92010 flow [2023-01-28 05:10:01,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 53.96153846153846) internal successors, (1403), 26 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:10:01,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:10:01,293 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:10:01,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-28 05:10:01,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-28 05:10:01,497 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:10:01,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:10:01,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1412434121, now seen corresponding path program 26 times [2023-01-28 05:10:01,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:10:01,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670421662] [2023-01-28 05:10:01,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:10:01,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:10:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:10:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:10:01,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:10:01,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670421662] [2023-01-28 05:10:01,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670421662] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:10:01,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159882595] [2023-01-28 05:10:01,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:10:01,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:10:01,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:10:01,678 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:10:01,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-28 05:10:01,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:10:01,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:10:01,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 05:10:01,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:10:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:10:01,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:10:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:10:02,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159882595] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:10:02,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:10:02,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9] total 13 [2023-01-28 05:10:02,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498194253] [2023-01-28 05:10:02,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:10:02,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 05:10:02,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:10:02,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 05:10:02,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-01-28 05:10:02,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 137 [2023-01-28 05:10:02,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 2543 transitions, 92010 flow. Second operand has 15 states, 15 states have (on average 65.33333333333333) internal successors, (980), 15 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:10:02,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:10:02,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 137 [2023-01-28 05:10:02,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:10:17,175 INFO L130 PetriNetUnfolder]: 10420/20394 cut-off events. [2023-01-28 05:10:17,175 INFO L131 PetriNetUnfolder]: For 1021786/1021790 co-relation queries the response was YES. [2023-01-28 05:10:17,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258512 conditions, 20394 events. 10420/20394 cut-off events. For 1021786/1021790 co-relation queries the response was YES. Maximal size of possible extension queue 1486. Compared 194177 event pairs, 705 based on Foata normal form. 6/20393 useless extension candidates. Maximal degree in co-relation 257449. Up to 7919 conditions per place. [2023-01-28 05:10:17,454 INFO L137 encePairwiseOnDemand]: 133/137 looper letters, 1798 selfloop transitions, 1910 changer transitions 71/3792 dead transitions. [2023-01-28 05:10:17,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 3792 transitions, 139482 flow [2023-01-28 05:10:17,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 05:10:17,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 05:10:17,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 509 transitions. [2023-01-28 05:10:17,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5307612095933264 [2023-01-28 05:10:17,455 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 509 transitions. [2023-01-28 05:10:17,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 509 transitions. [2023-01-28 05:10:17,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:10:17,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 509 transitions. [2023-01-28 05:10:17,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 72.71428571428571) internal successors, (509), 7 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:10:17,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:10:17,456 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 137.0) internal successors, (1096), 8 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:10:17,456 INFO L175 Difference]: Start difference. First operand has 583 places, 2543 transitions, 92010 flow. Second operand 7 states and 509 transitions. [2023-01-28 05:10:17,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 3792 transitions, 139482 flow [2023-01-28 05:10:34,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 3792 transitions, 136869 flow, removed 1218 selfloop flow, removed 13 redundant places. [2023-01-28 05:10:34,708 INFO L231 Difference]: Finished difference. Result has 581 places, 3366 transitions, 129443 flow [2023-01-28 05:10:34,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=90481, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1086, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=129443, PETRI_PLACES=581, PETRI_TRANSITIONS=3366} [2023-01-28 05:10:34,711 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 561 predicate places. [2023-01-28 05:10:34,711 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 3366 transitions, 129443 flow [2023-01-28 05:10:34,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 65.33333333333333) internal successors, (980), 15 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:10:34,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:10:34,711 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:10:34,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-01-28 05:10:34,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-28 05:10:34,916 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:10:34,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:10:34,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1079980299, now seen corresponding path program 27 times [2023-01-28 05:10:34,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:10:34,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510901349] [2023-01-28 05:10:34,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:10:34,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:10:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:10:35,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:10:35,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:10:35,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510901349] [2023-01-28 05:10:35,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510901349] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:10:35,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425183775] [2023-01-28 05:10:35,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:10:35,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:10:35,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:10:35,062 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:10:35,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-28 05:10:35,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 05:10:35,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:10:35,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-28 05:10:35,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:10:35,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:10:35,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:10:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:10:35,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425183775] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:10:35,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:10:35,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-01-28 05:10:35,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885472298] [2023-01-28 05:10:35,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:10:35,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 05:10:35,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:10:35,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 05:10:35,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2023-01-28 05:10:35,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:10:35,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 3366 transitions, 129443 flow. Second operand has 27 states, 27 states have (on average 53.96296296296296) internal successors, (1457), 27 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:10:35,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:10:35,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:10:35,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:10:58,481 INFO L130 PetriNetUnfolder]: 11506/22564 cut-off events. [2023-01-28 05:10:58,482 INFO L131 PetriNetUnfolder]: For 1238342/1238342 co-relation queries the response was YES. [2023-01-28 05:10:58,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297807 conditions, 22564 events. 11506/22564 cut-off events. For 1238342/1238342 co-relation queries the response was YES. Maximal size of possible extension queue 1724. Compared 218432 event pairs, 7 based on Foata normal form. 172/22736 useless extension candidates. Maximal degree in co-relation 296654. Up to 5155 conditions per place. [2023-01-28 05:10:58,832 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 613 selfloop transitions, 3375 changer transitions 24/4012 dead transitions. [2023-01-28 05:10:58,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 4012 transitions, 156394 flow [2023-01-28 05:10:58,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-01-28 05:10:58,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-01-28 05:10:58,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2704 transitions. [2023-01-28 05:10:58,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199409846249418 [2023-01-28 05:10:58,839 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2704 transitions. [2023-01-28 05:10:58,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2704 transitions. [2023-01-28 05:10:58,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:10:58,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2704 transitions. [2023-01-28 05:10:58,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 57.53191489361702) internal successors, (2704), 47 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:10:58,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 137.0) internal successors, (6576), 48 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:10:58,844 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 137.0) internal successors, (6576), 48 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:10:58,844 INFO L175 Difference]: Start difference. First operand has 581 places, 3366 transitions, 129443 flow. Second operand 47 states and 2704 transitions. [2023-01-28 05:10:58,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 4012 transitions, 156394 flow [2023-01-28 05:11:23,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 4012 transitions, 155030 flow, removed 649 selfloop flow, removed 2 redundant places. [2023-01-28 05:11:23,452 INFO L231 Difference]: Finished difference. Result has 626 places, 3718 transitions, 148508 flow [2023-01-28 05:11:23,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=128441, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3006, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=148508, PETRI_PLACES=626, PETRI_TRANSITIONS=3718} [2023-01-28 05:11:23,455 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 606 predicate places. [2023-01-28 05:11:23,455 INFO L495 AbstractCegarLoop]: Abstraction has has 626 places, 3718 transitions, 148508 flow [2023-01-28 05:11:23,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 53.96296296296296) internal successors, (1457), 27 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:11:23,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:11:23,455 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:11:23,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-01-28 05:11:23,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:11:23,656 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:11:23,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:11:23,656 INFO L85 PathProgramCache]: Analyzing trace with hash -570063603, now seen corresponding path program 28 times [2023-01-28 05:11:23,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:11:23,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187268987] [2023-01-28 05:11:23,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:11:23,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:11:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:11:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:11:23,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:11:23,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187268987] [2023-01-28 05:11:23,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187268987] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:11:23,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449623839] [2023-01-28 05:11:23,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:11:23,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:11:23,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:11:23,791 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:11:23,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-28 05:11:23,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:11:23,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:11:23,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 05:11:23,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:11:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:11:24,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:11:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:11:24,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449623839] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:11:24,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:11:24,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2023-01-28 05:11:24,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721093722] [2023-01-28 05:11:24,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:11:24,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 05:11:24,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:11:24,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 05:11:24,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2023-01-28 05:11:24,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:11:24,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 626 places, 3718 transitions, 148508 flow. Second operand has 26 states, 26 states have (on average 53.88461538461539) internal successors, (1401), 26 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:11:24,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:11:24,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:11:24,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:11:52,508 INFO L130 PetriNetUnfolder]: 12790/25146 cut-off events. [2023-01-28 05:11:52,508 INFO L131 PetriNetUnfolder]: For 1462728/1462728 co-relation queries the response was YES. [2023-01-28 05:11:52,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339191 conditions, 25146 events. 12790/25146 cut-off events. For 1462728/1462728 co-relation queries the response was YES. Maximal size of possible extension queue 1901. Compared 247961 event pairs, 257 based on Foata normal form. 278/25424 useless extension candidates. Maximal degree in co-relation 337997. Up to 8557 conditions per place. [2023-01-28 05:11:52,934 INFO L137 encePairwiseOnDemand]: 128/137 looper letters, 1887 selfloop transitions, 2564 changer transitions 19/4470 dead transitions. [2023-01-28 05:11:52,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 684 places, 4470 transitions, 179281 flow [2023-01-28 05:11:52,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-01-28 05:11:52,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-01-28 05:11:52,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3370 transitions. [2023-01-28 05:11:52,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169244092539899 [2023-01-28 05:11:52,937 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3370 transitions. [2023-01-28 05:11:52,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3370 transitions. [2023-01-28 05:11:52,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:11:52,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3370 transitions. [2023-01-28 05:11:52,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 57.11864406779661) internal successors, (3370), 59 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:11:52,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 137.0) internal successors, (8220), 60 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:11:52,944 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 137.0) internal successors, (8220), 60 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:11:52,944 INFO L175 Difference]: Start difference. First operand has 626 places, 3718 transitions, 148508 flow. Second operand 59 states and 3370 transitions. [2023-01-28 05:11:52,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 684 places, 4470 transitions, 179281 flow [2023-01-28 05:12:20,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 4470 transitions, 177826 flow, removed 292 selfloop flow, removed 17 redundant places. [2023-01-28 05:12:20,687 INFO L231 Difference]: Finished difference. Result has 677 places, 4134 transitions, 170891 flow [2023-01-28 05:12:20,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=147113, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=170891, PETRI_PLACES=677, PETRI_TRANSITIONS=4134} [2023-01-28 05:12:20,690 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 657 predicate places. [2023-01-28 05:12:20,690 INFO L495 AbstractCegarLoop]: Abstraction has has 677 places, 4134 transitions, 170891 flow [2023-01-28 05:12:20,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 53.88461538461539) internal successors, (1401), 26 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:12:20,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:12:20,690 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:12:20,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-28 05:12:20,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:12:20,897 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:12:20,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:12:20,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2007987801, now seen corresponding path program 29 times [2023-01-28 05:12:20,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:12:20,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967144802] [2023-01-28 05:12:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:12:20,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:12:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:12:21,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:12:21,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:12:21,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967144802] [2023-01-28 05:12:21,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967144802] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:12:21,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967424612] [2023-01-28 05:12:21,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:12:21,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:12:21,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:12:21,017 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:12:21,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-28 05:12:21,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 05:12:21,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:12:21,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-28 05:12:21,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:12:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:12:21,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:12:21,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:12:21,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967424612] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:12:21,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:12:21,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-01-28 05:12:21,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007707851] [2023-01-28 05:12:21,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:12:21,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 05:12:21,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:12:21,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 05:12:21,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2023-01-28 05:12:21,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:12:21,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 677 places, 4134 transitions, 170891 flow. Second operand has 25 states, 25 states have (on average 53.6) internal successors, (1340), 25 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:12:21,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:12:21,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:12:21,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:12:55,365 INFO L130 PetriNetUnfolder]: 13442/26547 cut-off events. [2023-01-28 05:12:55,365 INFO L131 PetriNetUnfolder]: For 1687724/1687724 co-relation queries the response was YES. [2023-01-28 05:12:55,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367912 conditions, 26547 events. 13442/26547 cut-off events. For 1687724/1687724 co-relation queries the response was YES. Maximal size of possible extension queue 2014. Compared 265533 event pairs, 167 based on Foata normal form. 198/26745 useless extension candidates. Maximal degree in co-relation 366717. Up to 6011 conditions per place. [2023-01-28 05:12:55,821 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 1338 selfloop transitions, 3366 changer transitions 6/4710 dead transitions. [2023-01-28 05:12:55,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 746 places, 4710 transitions, 194345 flow [2023-01-28 05:12:55,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-01-28 05:12:55,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-01-28 05:12:55,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4165 transitions. [2023-01-28 05:12:55,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41645835416458354 [2023-01-28 05:12:55,824 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4165 transitions. [2023-01-28 05:12:55,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4165 transitions. [2023-01-28 05:12:55,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:12:55,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4165 transitions. [2023-01-28 05:12:55,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 57.054794520547944) internal successors, (4165), 73 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:12:55,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 137.0) internal successors, (10138), 74 states have internal predecessors, (10138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:12:55,832 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 137.0) internal successors, (10138), 74 states have internal predecessors, (10138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:12:55,832 INFO L175 Difference]: Start difference. First operand has 677 places, 4134 transitions, 170891 flow. Second operand 73 states and 4165 transitions. [2023-01-28 05:12:55,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 746 places, 4710 transitions, 194345 flow [2023-01-28 05:13:29,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 4710 transitions, 192161 flow, removed 387 selfloop flow, removed 41 redundant places. [2023-01-28 05:13:29,867 INFO L231 Difference]: Finished difference. Result has 712 places, 4362 transitions, 186521 flow [2023-01-28 05:13:29,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=168503, PETRI_DIFFERENCE_MINUEND_PLACES=633, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=835, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=186521, PETRI_PLACES=712, PETRI_TRANSITIONS=4362} [2023-01-28 05:13:29,870 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 692 predicate places. [2023-01-28 05:13:29,870 INFO L495 AbstractCegarLoop]: Abstraction has has 712 places, 4362 transitions, 186521 flow [2023-01-28 05:13:29,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 53.6) internal successors, (1340), 25 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:13:29,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:13:29,870 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:13:29,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-28 05:13:30,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-01-28 05:13:30,073 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:13:30,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:13:30,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1247701379, now seen corresponding path program 30 times [2023-01-28 05:13:30,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:13:30,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794340783] [2023-01-28 05:13:30,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:13:30,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:13:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:13:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:13:30,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:13:30,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794340783] [2023-01-28 05:13:30,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794340783] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:13:30,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884077997] [2023-01-28 05:13:30,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:13:30,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:13:30,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:13:30,201 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:13:30,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-28 05:13:30,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 05:13:30,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:13:30,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-28 05:13:30,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:13:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:13:30,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:13:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:13:30,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884077997] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:13:30,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:13:30,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-01-28 05:13:30,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313144899] [2023-01-28 05:13:30,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:13:30,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 05:13:30,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:13:30,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 05:13:30,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2023-01-28 05:13:30,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:13:30,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 712 places, 4362 transitions, 186521 flow. Second operand has 28 states, 28 states have (on average 53.92857142857143) internal successors, (1510), 28 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:13:30,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:13:30,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:13:30,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:14:08,211 INFO L130 PetriNetUnfolder]: 14093/27798 cut-off events. [2023-01-28 05:14:08,212 INFO L131 PetriNetUnfolder]: For 1832570/1832570 co-relation queries the response was YES. [2023-01-28 05:14:08,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394317 conditions, 27798 events. 14093/27798 cut-off events. For 1832570/1832570 co-relation queries the response was YES. Maximal size of possible extension queue 2152. Compared 279662 event pairs, 199 based on Foata normal form. 126/27924 useless extension candidates. Maximal degree in co-relation 393110. Up to 8540 conditions per place. [2023-01-28 05:14:08,700 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 871 selfloop transitions, 3890 changer transitions 17/4778 dead transitions. [2023-01-28 05:14:08,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 752 places, 4778 transitions, 208282 flow [2023-01-28 05:14:08,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-28 05:14:08,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-28 05:14:08,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2357 transitions. [2023-01-28 05:14:08,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4196190137083853 [2023-01-28 05:14:08,702 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2357 transitions. [2023-01-28 05:14:08,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2357 transitions. [2023-01-28 05:14:08,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:14:08,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2357 transitions. [2023-01-28 05:14:08,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 57.48780487804878) internal successors, (2357), 41 states have internal predecessors, (2357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:14:08,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 137.0) internal successors, (5754), 42 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:14:08,707 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 137.0) internal successors, (5754), 42 states have internal predecessors, (5754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:14:08,707 INFO L175 Difference]: Start difference. First operand has 712 places, 4362 transitions, 186521 flow. Second operand 41 states and 2357 transitions. [2023-01-28 05:14:08,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 752 places, 4778 transitions, 208282 flow [2023-01-28 05:14:49,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 710 places, 4778 transitions, 206235 flow, removed 359 selfloop flow, removed 42 redundant places. [2023-01-28 05:14:49,255 INFO L231 Difference]: Finished difference. Result has 720 places, 4585 transitions, 205454 flow [2023-01-28 05:14:49,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=184563, PETRI_DIFFERENCE_MINUEND_PLACES=670, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3666, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=205454, PETRI_PLACES=720, PETRI_TRANSITIONS=4585} [2023-01-28 05:14:49,258 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 700 predicate places. [2023-01-28 05:14:49,258 INFO L495 AbstractCegarLoop]: Abstraction has has 720 places, 4585 transitions, 205454 flow [2023-01-28 05:14:49,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 53.92857142857143) internal successors, (1510), 28 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:14:49,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:14:49,258 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:14:49,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-01-28 05:14:49,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:14:49,459 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:14:49,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:14:49,459 INFO L85 PathProgramCache]: Analyzing trace with hash -374253849, now seen corresponding path program 31 times [2023-01-28 05:14:49,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:14:49,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170254902] [2023-01-28 05:14:49,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:14:49,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:14:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:14:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:14:49,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:14:49,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170254902] [2023-01-28 05:14:49,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170254902] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:14:49,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021137428] [2023-01-28 05:14:49,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:14:49,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:14:49,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:14:49,587 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:14:49,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-28 05:14:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:14:49,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 05:14:49,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:14:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:14:49,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:14:49,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:14:49,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021137428] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:14:49,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:14:49,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-01-28 05:14:49,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482152646] [2023-01-28 05:14:49,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:14:49,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 05:14:49,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:14:49,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 05:14:49,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2023-01-28 05:14:49,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:14:49,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 720 places, 4585 transitions, 205454 flow. Second operand has 27 states, 27 states have (on average 53.74074074074074) internal successors, (1451), 27 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) [2023-01-28 05:14:49,984 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:14:49,984 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:14:49,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:15:42,929 INFO L130 PetriNetUnfolder]: 15802/31241 cut-off events. [2023-01-28 05:15:42,930 INFO L131 PetriNetUnfolder]: For 2252934/2252934 co-relation queries the response was YES. [2023-01-28 05:15:43,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455355 conditions, 31241 events. 15802/31241 cut-off events. For 2252934/2252934 co-relation queries the response was YES. Maximal size of possible extension queue 2295. Compared 319383 event pairs, 238 based on Foata normal form. 104/31345 useless extension candidates. Maximal degree in co-relation 453557. Up to 6871 conditions per place. [2023-01-28 05:15:43,531 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 564 selfloop transitions, 4778 changer transitions 13/5355 dead transitions. [2023-01-28 05:15:43,531 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 781 places, 5355 transitions, 241091 flow [2023-01-28 05:15:43,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-01-28 05:15:43,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-01-28 05:15:43,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3524 transitions. [2023-01-28 05:15:43,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148810925359077 [2023-01-28 05:15:43,534 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3524 transitions. [2023-01-28 05:15:43,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3524 transitions. [2023-01-28 05:15:43,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:15:43,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3524 transitions. [2023-01-28 05:15:43,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 56.83870967741935) internal successors, (3524), 62 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:15:43,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 137.0) internal successors, (8631), 63 states have internal predecessors, (8631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:15:43,541 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 137.0) internal successors, (8631), 63 states have internal predecessors, (8631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:15:43,541 INFO L175 Difference]: Start difference. First operand has 720 places, 4585 transitions, 205454 flow. Second operand 62 states and 3524 transitions. [2023-01-28 05:15:43,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 781 places, 5355 transitions, 241091 flow [2023-01-28 05:16:33,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 766 places, 5355 transitions, 240645 flow, removed 147 selfloop flow, removed 15 redundant places. [2023-01-28 05:16:33,363 INFO L231 Difference]: Finished difference. Result has 781 places, 5166 transitions, 243311 flow [2023-01-28 05:16:33,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=204975, PETRI_DIFFERENCE_MINUEND_PLACES=705, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=243311, PETRI_PLACES=781, PETRI_TRANSITIONS=5166} [2023-01-28 05:16:33,367 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 761 predicate places. [2023-01-28 05:16:33,367 INFO L495 AbstractCegarLoop]: Abstraction has has 781 places, 5166 transitions, 243311 flow [2023-01-28 05:16:33,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 53.74074074074074) internal successors, (1451), 27 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) [2023-01-28 05:16:33,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:16:33,367 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:16:33,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-01-28 05:16:33,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:16:33,568 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:16:33,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:16:33,568 INFO L85 PathProgramCache]: Analyzing trace with hash 843710407, now seen corresponding path program 32 times [2023-01-28 05:16:33,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:16:33,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042668668] [2023-01-28 05:16:33,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:16:33,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:16:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:16:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:16:33,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:16:33,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042668668] [2023-01-28 05:16:33,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042668668] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:16:33,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989776210] [2023-01-28 05:16:33,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:16:33,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:16:33,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:16:33,725 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:16:33,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-28 05:16:33,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:16:33,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:16:33,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-28 05:16:33,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:16:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:16:33,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:16:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:16:34,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989776210] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:16:34,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:16:34,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 27 [2023-01-28 05:16:34,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71731091] [2023-01-28 05:16:34,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:16:34,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 05:16:34,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:16:34,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 05:16:34,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2023-01-28 05:16:34,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:16:34,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 781 places, 5166 transitions, 243311 flow. Second operand has 27 states, 27 states have (on average 53.81481481481482) internal successors, (1453), 27 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:16:34,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:16:34,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:16:34,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:17:46,344 INFO L130 PetriNetUnfolder]: 17620/34603 cut-off events. [2023-01-28 05:17:46,345 INFO L131 PetriNetUnfolder]: For 2812587/2812587 co-relation queries the response was YES. [2023-01-28 05:17:47,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539688 conditions, 34603 events. 17620/34603 cut-off events. For 2812587/2812587 co-relation queries the response was YES. Maximal size of possible extension queue 2584. Compared 358028 event pairs, 237 based on Foata normal form. 684/35287 useless extension candidates. Maximal degree in co-relation 537878. Up to 11657 conditions per place. [2023-01-28 05:17:47,410 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 1721 selfloop transitions, 4292 changer transitions 91/6104 dead transitions. [2023-01-28 05:17:47,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 6104 transitions, 293304 flow [2023-01-28 05:17:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-28 05:17:47,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-28 05:17:47,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2528 transitions. [2023-01-28 05:17:47,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41937624419376246 [2023-01-28 05:17:47,412 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2528 transitions. [2023-01-28 05:17:47,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2528 transitions. [2023-01-28 05:17:47,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:17:47,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2528 transitions. [2023-01-28 05:17:47,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 57.45454545454545) internal successors, (2528), 44 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:17:47,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 137.0) internal successors, (6165), 45 states have internal predecessors, (6165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:17:47,417 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 137.0) internal successors, (6165), 45 states have internal predecessors, (6165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:17:47,417 INFO L175 Difference]: Start difference. First operand has 781 places, 5166 transitions, 243311 flow. Second operand 44 states and 2528 transitions. [2023-01-28 05:17:47,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 6104 transitions, 293304 flow [2023-01-28 05:19:11,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 798 places, 6104 transitions, 287470 flow, removed 1162 selfloop flow, removed 24 redundant places. [2023-01-28 05:19:11,319 INFO L231 Difference]: Finished difference. Result has 810 places, 5778 transitions, 280384 flow [2023-01-28 05:19:11,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=137, PETRI_DIFFERENCE_MINUEND_FLOW=238068, PETRI_DIFFERENCE_MINUEND_PLACES=755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3632, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=280384, PETRI_PLACES=810, PETRI_TRANSITIONS=5778} [2023-01-28 05:19:11,323 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 790 predicate places. [2023-01-28 05:19:11,323 INFO L495 AbstractCegarLoop]: Abstraction has has 810 places, 5778 transitions, 280384 flow [2023-01-28 05:19:11,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 53.81481481481482) internal successors, (1453), 27 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:19:11,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:19:11,323 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:19:11,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-01-28 05:19:11,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-01-28 05:19:11,524 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:19:11,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:19:11,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1484966421, now seen corresponding path program 33 times [2023-01-28 05:19:11,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:19:11,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512100608] [2023-01-28 05:19:11,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:19:11,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:19:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:19:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:19:11,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:19:11,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512100608] [2023-01-28 05:19:11,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512100608] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:19:11,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592736578] [2023-01-28 05:19:11,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:19:11,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:19:11,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:19:11,685 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:19:11,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-28 05:19:11,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-01-28 05:19:11,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:19:11,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 05:19:11,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:19:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:19:11,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:19:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:19:12,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592736578] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:19:12,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:19:12,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2023-01-28 05:19:12,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537460372] [2023-01-28 05:19:12,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:19:12,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 05:19:12,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:19:12,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 05:19:12,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2023-01-28 05:19:12,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 137 [2023-01-28 05:19:12,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 810 places, 5778 transitions, 280384 flow. Second operand has 29 states, 29 states have (on average 53.58620689655172) internal successors, (1554), 29 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:19:12,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:19:12,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 137 [2023-01-28 05:19:12,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:20:47,960 INFO L130 PetriNetUnfolder]: 20082/39656 cut-off events. [2023-01-28 05:20:47,960 INFO L131 PetriNetUnfolder]: For 3344915/3344915 co-relation queries the response was YES. [2023-01-28 05:20:48,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621852 conditions, 39656 events. 20082/39656 cut-off events. For 3344915/3344915 co-relation queries the response was YES. Maximal size of possible extension queue 2890. Compared 417405 event pairs, 295 based on Foata normal form. 344/40000 useless extension candidates. Maximal degree in co-relation 619398. Up to 10457 conditions per place. [2023-01-28 05:20:49,058 INFO L137 encePairwiseOnDemand]: 129/137 looper letters, 2245 selfloop transitions, 4597 changer transitions 36/6878 dead transitions. [2023-01-28 05:20:49,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 854 places, 6878 transitions, 338387 flow [2023-01-28 05:20:49,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-01-28 05:20:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-01-28 05:20:49,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2583 transitions. [2023-01-28 05:20:49,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41897810218978104 [2023-01-28 05:20:49,061 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2583 transitions. [2023-01-28 05:20:49,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2583 transitions. [2023-01-28 05:20:49,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:20:49,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2583 transitions. [2023-01-28 05:20:49,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.4) internal successors, (2583), 45 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:20:49,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 137.0) internal successors, (6302), 46 states have internal predecessors, (6302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:20:49,066 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 137.0) internal successors, (6302), 46 states have internal predecessors, (6302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:20:49,066 INFO L175 Difference]: Start difference. First operand has 810 places, 5778 transitions, 280384 flow. Second operand 45 states and 2583 transitions. [2023-01-28 05:20:49,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 854 places, 6878 transitions, 338387 flow Received shutdown request... [2023-01-28 05:21:57,311 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 05:21:57,348 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 05:21:57,373 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 05:21:57,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-01-28 05:21:57,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-01-28 05:21:57,574 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-01-28 05:21:57,575 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 05:21:57,575 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 05:21:57,576 INFO L445 BasicCegarLoop]: Path program histogram: [33, 2, 1] [2023-01-28 05:21:57,578 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 05:21:57,578 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 05:21:57,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 05:21:57 BasicIcfg [2023-01-28 05:21:57,579 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 05:21:57,579 INFO L158 Benchmark]: Toolchain (without parser) took 834069.47ms. Allocated memory was 346.0MB in the beginning and 5.7GB in the end (delta: 5.3GB). Free memory was 314.9MB in the beginning and 3.5GB in the end (delta: -3.2GB). Peak memory consumption was 6.1GB. Max. memory is 16.0GB. [2023-01-28 05:21:57,580 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 255.9MB. Free memory is still 213.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 05:21:57,580 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.94ms. Allocated memory is still 346.0MB. Free memory was 314.5MB in the beginning and 304.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 05:21:57,580 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.38ms. Allocated memory is still 346.0MB. Free memory was 304.0MB in the beginning and 302.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 05:21:57,580 INFO L158 Benchmark]: Boogie Preprocessor took 27.21ms. Allocated memory is still 346.0MB. Free memory was 302.3MB in the beginning and 301.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 05:21:57,580 INFO L158 Benchmark]: RCFGBuilder took 267.15ms. Allocated memory is still 346.0MB. Free memory was 301.1MB in the beginning and 286.8MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-01-28 05:21:57,580 INFO L158 Benchmark]: TraceAbstraction took 833561.53ms. Allocated memory was 346.0MB in the beginning and 5.7GB in the end (delta: 5.3GB). Free memory was 286.0MB in the beginning and 3.5GB in the end (delta: -3.2GB). Peak memory consumption was 6.1GB. Max. memory is 16.0GB. [2023-01-28 05:21:57,581 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 255.9MB. Free memory is still 213.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 183.94ms. Allocated memory is still 346.0MB. Free memory was 314.5MB in the beginning and 304.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 24.38ms. Allocated memory is still 346.0MB. Free memory was 304.0MB in the beginning and 302.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 27.21ms. Allocated memory is still 346.0MB. Free memory was 302.3MB in the beginning and 301.1MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 267.15ms. Allocated memory is still 346.0MB. Free memory was 301.1MB in the beginning and 286.8MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 833561.53ms. Allocated memory was 346.0MB in the beginning and 5.7GB in the end (delta: 5.3GB). Free memory was 286.0MB in the beginning and 3.5GB in the end (delta: -3.2GB). Peak memory consumption was 6.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 67 PlacesBefore, 20 PlacesAfterwards, 66 TransitionsBefore, 15 TransitionsAfterwards, 404 CoEnabledTransitionPairs, 6 FixpointIterations, 33 TrivialSequentialCompositions, 14 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 61 TotalNumberOfCompositions, 413 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 410, independent: 409, independent conditional: 0, independent unconditional: 409, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 212, independent: 211, independent conditional: 0, independent unconditional: 211, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 410, independent: 198, independent conditional: 0, independent unconditional: 198, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 212, unknown conditional: 0, unknown unconditional: 212] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - 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 executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 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: 833.5s, OverallIterations: 36, TraceHistogramMax: 4, PathProgramHistogramMax: 33, EmptinessCheckTime: 0.0s, AutomataDifference: 811.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5401 SdHoareTripleChecker+Valid, 8.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5401 mSDsluCounter, 578 SdHoareTripleChecker+Invalid, 6.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 409 mSDsCounter, 929 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19474 IncrementalHoareTripleChecker+Invalid, 20403 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 929 mSolverCounterUnsat, 169 mSDtfsCounter, 19474 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2785 GetRequests, 1321 SyntacticMatches, 62 SemanticMatches, 1402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21700 ImplicationChecksByTransitivity, 14.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=280384occurred in iteration=35, InterpolantAutomatonStates: 1003, 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, 0.7s SatisfiabilityAnalysisTime, 11.1s InterpolantComputationTime, 1257 NumberOfCodeBlocks, 1247 NumberOfCodeBlocksAsserted, 116 NumberOfCheckSat, 1755 ConstructedInterpolants, 0 QuantifiedInterpolants, 9631 SizeOfPredicates, 219 NumberOfNonLiveVariables, 4177 ConjunctsInSsa, 412 ConjunctsInUnsatCore, 103 InterpolantComputations, 4 PerfectInterpolantSequences, 288/1026 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