/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-3902331-m [2022-09-20 23:22:25,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-20 23:22:25,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-20 23:22:25,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-20 23:22:25,760 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-20 23:22:25,761 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-20 23:22:25,762 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-20 23:22:25,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-20 23:22:25,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-20 23:22:25,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-20 23:22:25,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-20 23:22:25,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-20 23:22:25,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-20 23:22:25,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-20 23:22:25,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-20 23:22:25,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-20 23:22:25,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-20 23:22:25,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-20 23:22:25,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-20 23:22:25,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-20 23:22:25,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-20 23:22:25,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-20 23:22:25,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-20 23:22:25,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-20 23:22:25,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-09-20 23:22:25,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-20 23:22:25,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-20 23:22:25,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-20 23:22:25,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-20 23:22:25,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-20 23:22:25,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-20 23:22:25,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-20 23:22:25,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-20 23:22:25,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-20 23:22:25,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-20 23:22:25,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-20 23:22:25,820 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2022-09-20 23:22:25,858 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-20 23:22:25,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-20 23:22:25,859 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-20 23:22:25,859 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-20 23:22:25,860 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-20 23:22:25,860 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-20 23:22:25,860 INFO L138 SettingsManager]: * Use SBE=true [2022-09-20 23:22:25,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-20 23:22:25,860 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-20 23:22:25,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-20 23:22:25,861 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-20 23:22:25,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-20 23:22:25,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-20 23:22:25,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-20 23:22:25,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-20 23:22:25,862 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-20 23:22:25,862 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-20 23:22:25,862 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-20 23:22:25,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-20 23:22:25,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-20 23:22:25,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-20 23:22:25,863 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-20 23:22:25,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-20 23:22:25,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 23:22:25,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-20 23:22:25,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-20 23:22:25,864 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-20 23:22:25,864 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-20 23:22:25,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-20 23:22:25,865 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-20 23:22:25,865 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-20 23:22:25,865 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-20 23:22:26,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-20 23:22:26,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-20 23:22:26,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-20 23:22:26,137 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-20 23:22:26,137 INFO L275 PluginConnector]: CDTParser initialized [2022-09-20 23:22:26,139 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-09-20 23:22:26,201 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcfba9c1f/2f6d99d7ab7b4e9cb3ce1b2d773df9e8/FLAG5affd9744 [2022-09-20 23:22:26,614 INFO L306 CDTParser]: Found 1 translation units. [2022-09-20 23:22:26,614 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-09-20 23:22:26,622 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcfba9c1f/2f6d99d7ab7b4e9cb3ce1b2d773df9e8/FLAG5affd9744 [2022-09-20 23:22:27,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fcfba9c1f/2f6d99d7ab7b4e9cb3ce1b2d773df9e8 [2022-09-20 23:22:27,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-20 23:22:27,023 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-20 23:22:27,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-20 23:22:27,040 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-20 23:22:27,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-20 23:22:27,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 11:22:27" (1/1) ... [2022-09-20 23:22:27,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a35608f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:22:27, skipping insertion in model container [2022-09-20 23:22:27,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 11:22:27" (1/1) ... [2022-09-20 23:22:27,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-20 23:22:27,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-20 23:22:27,309 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-09-20 23:22:27,312 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 23:22:27,319 INFO L203 MainTranslator]: Completed pre-run [2022-09-20 23:22:27,349 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-09-20 23:22:27,355 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 23:22:27,366 INFO L208 MainTranslator]: Completed translation [2022-09-20 23:22:27,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:22:27 WrapperNode [2022-09-20 23:22:27,369 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-20 23:22:27,370 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-20 23:22:27,370 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-20 23:22:27,370 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-20 23:22:27,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:22:27" (1/1) ... [2022-09-20 23:22:27,383 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:22:27" (1/1) ... [2022-09-20 23:22:27,403 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2022-09-20 23:22:27,404 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-20 23:22:27,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-20 23:22:27,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-20 23:22:27,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-20 23:22:27,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:22:27" (1/1) ... [2022-09-20 23:22:27,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:22:27" (1/1) ... [2022-09-20 23:22:27,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:22:27" (1/1) ... [2022-09-20 23:22:27,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:22:27" (1/1) ... [2022-09-20 23:22:27,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:22:27" (1/1) ... [2022-09-20 23:22:27,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:22:27" (1/1) ... [2022-09-20 23:22:27,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:22:27" (1/1) ... [2022-09-20 23:22:27,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-20 23:22:27,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-20 23:22:27,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-20 23:22:27,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-20 23:22:27,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:22:27" (1/1) ... [2022-09-20 23:22:27,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 23:22:27,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:22:27,477 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-09-20 23:22:27,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-09-20 23:22:27,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-20 23:22:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-20 23:22:27,517 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-20 23:22:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-20 23:22:27,517 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-20 23:22:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-20 23:22:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-20 23:22:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-20 23:22:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-20 23:22:27,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-20 23:22:27,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-20 23:22:27,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-20 23:22:27,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-20 23:22:27,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-20 23:22:27,519 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-20 23:22:27,603 INFO L234 CfgBuilder]: Building ICFG [2022-09-20 23:22:27,605 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-20 23:22:27,787 INFO L275 CfgBuilder]: Performing block encoding [2022-09-20 23:22:27,828 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-20 23:22:27,829 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-09-20 23:22:27,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:22:27 BoogieIcfgContainer [2022-09-20 23:22:27,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-20 23:22:27,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-20 23:22:27,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-20 23:22:27,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-20 23:22:27,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 11:22:27" (1/3) ... [2022-09-20 23:22:27,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68bd85b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 11:22:27, skipping insertion in model container [2022-09-20 23:22:27,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:22:27" (2/3) ... [2022-09-20 23:22:27,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68bd85b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 11:22:27, skipping insertion in model container [2022-09-20 23:22:27,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:22:27" (3/3) ... [2022-09-20 23:22:27,844 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2022-09-20 23:22:27,859 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-20 23:22:27,859 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-09-20 23:22:27,859 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-20 23:22:27,933 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-09-20 23:22:27,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-09-20 23:22:28,034 INFO L130 PetriNetUnfolder]: 6/82 cut-off events. [2022-09-20 23:22:28,034 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-20 23:22:28,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-09-20 23:22:28,039 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-09-20 23:22:28,042 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-09-20 23:22:28,058 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 23:22:28,066 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;@62a1fcd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 23:22:28,067 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-09-20 23:22:28,099 INFO L130 PetriNetUnfolder]: 6/72 cut-off events. [2022-09-20 23:22:28,100 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-20 23:22:28,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:22:28,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:22:28,101 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:22:28,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:22:28,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1002777457, now seen corresponding path program 1 times [2022-09-20 23:22:28,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:22:28,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917382223] [2022-09-20 23:22:28,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:22:28,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:22:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:22:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:28,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:22:28,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917382223] [2022-09-20 23:22:28,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917382223] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:22:28,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:22:28,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-20 23:22:28,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596708385] [2022-09-20 23:22:28,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:22:28,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 23:22:28,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:22:28,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 23:22:28,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-09-20 23:22:28,610 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 84 [2022-09-20 23:22:28,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 6 states, 6 states have (on average 59.833333333333336) internal successors, (359), 6 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:28,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:22:28,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 84 [2022-09-20 23:22:28,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:22:28,760 INFO L130 PetriNetUnfolder]: 34/134 cut-off events. [2022-09-20 23:22:28,760 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-09-20 23:22:28,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 134 events. 34/134 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 297 event pairs, 9 based on Foata normal form. 2/113 useless extension candidates. Maximal degree in co-relation 136. Up to 49 conditions per place. [2022-09-20 23:22:28,763 INFO L137 encePairwiseOnDemand]: 74/84 looper letters, 20 selfloop transitions, 5 changer transitions 2/74 dead transitions. [2022-09-20 23:22:28,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 74 transitions, 217 flow [2022-09-20 23:22:28,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-09-20 23:22:28,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-09-20 23:22:28,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 376 transitions. [2022-09-20 23:22:28,784 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.746031746031746 [2022-09-20 23:22:28,785 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 376 transitions. [2022-09-20 23:22:28,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 376 transitions. [2022-09-20 23:22:28,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:22:28,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 376 transitions. [2022-09-20 23:22:28,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 62.666666666666664) internal successors, (376), 6 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:28,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:28,799 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:28,801 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 6 states and 376 transitions. [2022-09-20 23:22:28,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 74 transitions, 217 flow [2022-09-20 23:22:28,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 74 transitions, 207 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-09-20 23:22:28,807 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 156 flow [2022-09-20 23:22:28,809 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2022-09-20 23:22:28,812 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 2 predicate places. [2022-09-20 23:22:28,812 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 156 flow [2022-09-20 23:22:28,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.833333333333336) internal successors, (359), 6 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:28,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:22:28,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:22:28,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-20 23:22:28,813 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:22:28,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:22:28,814 INFO L85 PathProgramCache]: Analyzing trace with hash -991675395, now seen corresponding path program 1 times [2022-09-20 23:22:28,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:22:28,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861780763] [2022-09-20 23:22:28,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:22:28,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:22:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:22:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:28,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:22:28,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861780763] [2022-09-20 23:22:28,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861780763] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:22:28,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 23:22:28,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 23:22:28,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910468739] [2022-09-20 23:22:28,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:22:28,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 23:22:28,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:22:28,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 23:22:28,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-09-20 23:22:28,944 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 84 [2022-09-20 23:22:28,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 156 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) [2022-09-20 23:22:28,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:22:28,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 84 [2022-09-20 23:22:28,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:22:29,098 INFO L130 PetriNetUnfolder]: 71/264 cut-off events. [2022-09-20 23:22:29,099 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-09-20 23:22:29,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 264 events. 71/264 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1071 event pairs, 32 based on Foata normal form. 6/253 useless extension candidates. Maximal degree in co-relation 254. Up to 87 conditions per place. [2022-09-20 23:22:29,101 INFO L137 encePairwiseOnDemand]: 77/84 looper letters, 27 selfloop transitions, 5 changer transitions 3/86 dead transitions. [2022-09-20 23:22:29,101 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 86 transitions, 287 flow [2022-09-20 23:22:29,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-09-20 23:22:29,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-09-20 23:22:29,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 412 transitions. [2022-09-20 23:22:29,104 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8174603174603174 [2022-09-20 23:22:29,104 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 412 transitions. [2022-09-20 23:22:29,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 412 transitions. [2022-09-20 23:22:29,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:22:29,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 412 transitions. [2022-09-20 23:22:29,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 68.66666666666667) internal successors, (412), 6 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:29,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:29,108 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:29,108 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 156 flow. Second operand 6 states and 412 transitions. [2022-09-20 23:22:29,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 86 transitions, 287 flow [2022-09-20 23:22:29,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 86 transitions, 275 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-09-20 23:22:29,111 INFO L231 Difference]: Finished difference. Result has 78 places, 70 transitions, 176 flow [2022-09-20 23:22:29,112 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=176, PETRI_PLACES=78, PETRI_TRANSITIONS=70} [2022-09-20 23:22:29,112 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2022-09-20 23:22:29,113 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 70 transitions, 176 flow [2022-09-20 23:22:29,113 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) [2022-09-20 23:22:29,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:22:29,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:22:29,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-20 23:22:29,114 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:22:29,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:22:29,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1157130599, now seen corresponding path program 2 times [2022-09-20 23:22:29,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:22:29,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662503415] [2022-09-20 23:22:29,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:22:29,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:22:29,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:22:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:29,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:22:29,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662503415] [2022-09-20 23:22:29,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662503415] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:22:29,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746277582] [2022-09-20 23:22:29,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 23:22:29,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:22:29,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:22:29,255 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 23:22:29,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-09-20 23:22:29,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-09-20 23:22:29,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:22:29,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-20 23:22:29,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:22:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 23:22:29,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 23:22:29,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746277582] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 23:22:29,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 23:22:29,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-09-20 23:22:29,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563320709] [2022-09-20 23:22:29,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 23:22:29,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 23:22:29,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:22:29,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 23:22:29,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-09-20 23:22:29,575 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 84 [2022-09-20 23:22:29,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 70 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 58.166666666666664) internal successors, (349), 6 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:29,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:22:29,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 84 [2022-09-20 23:22:29,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:22:29,762 INFO L130 PetriNetUnfolder]: 54/190 cut-off events. [2022-09-20 23:22:29,763 INFO L131 PetriNetUnfolder]: For 97/110 co-relation queries the response was YES. [2022-09-20 23:22:29,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 190 events. 54/190 cut-off events. For 97/110 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 587 event pairs, 26 based on Foata normal form. 13/198 useless extension candidates. Maximal degree in co-relation 232. Up to 73 conditions per place. [2022-09-20 23:22:29,768 INFO L137 encePairwiseOnDemand]: 76/84 looper letters, 24 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2022-09-20 23:22:29,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 76 transitions, 257 flow [2022-09-20 23:22:29,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-09-20 23:22:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-09-20 23:22:29,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 470 transitions. [2022-09-20 23:22:29,771 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6994047619047619 [2022-09-20 23:22:29,772 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 470 transitions. [2022-09-20 23:22:29,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 470 transitions. [2022-09-20 23:22:29,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:22:29,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 470 transitions. [2022-09-20 23:22:29,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 58.75) internal successors, (470), 8 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:29,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:29,779 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 84.0) internal successors, (756), 9 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:29,779 INFO L175 Difference]: Start difference. First operand has 78 places, 70 transitions, 176 flow. Second operand 8 states and 470 transitions. [2022-09-20 23:22:29,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 76 transitions, 257 flow [2022-09-20 23:22:29,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 76 transitions, 241 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-09-20 23:22:29,785 INFO L231 Difference]: Finished difference. Result has 79 places, 69 transitions, 172 flow [2022-09-20 23:22:29,785 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=172, PETRI_PLACES=79, PETRI_TRANSITIONS=69} [2022-09-20 23:22:29,787 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2022-09-20 23:22:29,787 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 69 transitions, 172 flow [2022-09-20 23:22:29,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.166666666666664) internal successors, (349), 6 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:29,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:22:29,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:22:29,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-09-20 23:22:30,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:22:30,014 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:22:30,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:22:30,015 INFO L85 PathProgramCache]: Analyzing trace with hash 987804623, now seen corresponding path program 1 times [2022-09-20 23:22:30,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:22:30,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892414517] [2022-09-20 23:22:30,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:22:30,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:22:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:22:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:30,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:22:30,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892414517] [2022-09-20 23:22:30,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892414517] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:22:30,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358874158] [2022-09-20 23:22:30,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:22:30,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:22:30,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:22:30,323 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 23:22:30,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-09-20 23:22:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:22:30,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-09-20 23:22:30,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:22:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:30,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:22:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:30,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358874158] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:22:30,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:22:30,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 16 [2022-09-20 23:22:30,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798603658] [2022-09-20 23:22:30,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:22:30,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-09-20 23:22:30,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:22:30,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-09-20 23:22:30,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-09-20 23:22:30,832 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 84 [2022-09-20 23:22:30,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 69 transitions, 172 flow. Second operand has 16 states, 16 states have (on average 53.8125) internal successors, (861), 16 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:30,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:22:30,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 84 [2022-09-20 23:22:30,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:22:31,413 INFO L130 PetriNetUnfolder]: 206/622 cut-off events. [2022-09-20 23:22:31,414 INFO L131 PetriNetUnfolder]: For 194/194 co-relation queries the response was YES. [2022-09-20 23:22:31,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1295 conditions, 622 events. 206/622 cut-off events. For 194/194 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3306 event pairs, 38 based on Foata normal form. 11/630 useless extension candidates. Maximal degree in co-relation 493. Up to 112 conditions per place. [2022-09-20 23:22:31,417 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 80 selfloop transitions, 35 changer transitions 18/173 dead transitions. [2022-09-20 23:22:31,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 173 transitions, 770 flow [2022-09-20 23:22:31,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-20 23:22:31,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-20 23:22:31,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1179 transitions. [2022-09-20 23:22:31,426 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6683673469387755 [2022-09-20 23:22:31,426 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1179 transitions. [2022-09-20 23:22:31,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1179 transitions. [2022-09-20 23:22:31,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:22:31,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1179 transitions. [2022-09-20 23:22:31,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 56.142857142857146) internal successors, (1179), 21 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:31,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:31,434 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:31,435 INFO L175 Difference]: Start difference. First operand has 79 places, 69 transitions, 172 flow. Second operand 21 states and 1179 transitions. [2022-09-20 23:22:31,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 173 transitions, 770 flow [2022-09-20 23:22:31,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 173 transitions, 732 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-09-20 23:22:31,441 INFO L231 Difference]: Finished difference. Result has 111 places, 105 transitions, 462 flow [2022-09-20 23:22:31,442 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=462, PETRI_PLACES=111, PETRI_TRANSITIONS=105} [2022-09-20 23:22:31,443 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 37 predicate places. [2022-09-20 23:22:31,443 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 105 transitions, 462 flow [2022-09-20 23:22:31,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 53.8125) internal successors, (861), 16 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:31,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:22:31,444 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:22:31,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-09-20 23:22:31,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-09-20 23:22:31,668 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:22:31,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:22:31,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1478394585, now seen corresponding path program 2 times [2022-09-20 23:22:31,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:22:31,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127487047] [2022-09-20 23:22:31,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:22:31,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:22:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:22:31,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:31,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:22:31,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127487047] [2022-09-20 23:22:31,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127487047] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:22:31,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22019046] [2022-09-20 23:22:31,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 23:22:31,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:22:31,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:22:31,833 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 23:22:31,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-09-20 23:22:31,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 23:22:31,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:22:31,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 23:22:31,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:22:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:32,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:22:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:32,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22019046] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:22:32,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:22:32,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 16 [2022-09-20 23:22:32,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710340050] [2022-09-20 23:22:32,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:22:32,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-09-20 23:22:32,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:22:32,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-09-20 23:22:32,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-09-20 23:22:32,260 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 23:22:32,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 105 transitions, 462 flow. Second operand has 16 states, 16 states have (on average 64.3125) internal successors, (1029), 16 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:32,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:22:32,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 23:22:32,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:22:33,139 INFO L130 PetriNetUnfolder]: 345/911 cut-off events. [2022-09-20 23:22:33,139 INFO L131 PetriNetUnfolder]: For 2809/2821 co-relation queries the response was YES. [2022-09-20 23:22:33,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3184 conditions, 911 events. 345/911 cut-off events. For 2809/2821 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5199 event pairs, 9 based on Foata normal form. 23/934 useless extension candidates. Maximal degree in co-relation 3151. Up to 188 conditions per place. [2022-09-20 23:22:33,150 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 79 selfloop transitions, 114 changer transitions 10/263 dead transitions. [2022-09-20 23:22:33,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 263 transitions, 1931 flow [2022-09-20 23:22:33,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-09-20 23:22:33,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-09-20 23:22:33,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2124 transitions. [2022-09-20 23:22:33,156 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7901785714285714 [2022-09-20 23:22:33,156 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2124 transitions. [2022-09-20 23:22:33,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2124 transitions. [2022-09-20 23:22:33,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:22:33,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2124 transitions. [2022-09-20 23:22:33,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 66.375) internal successors, (2124), 32 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:33,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:33,167 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 84.0) internal successors, (2772), 33 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:33,167 INFO L175 Difference]: Start difference. First operand has 111 places, 105 transitions, 462 flow. Second operand 32 states and 2124 transitions. [2022-09-20 23:22:33,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 263 transitions, 1931 flow [2022-09-20 23:22:33,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 263 transitions, 1923 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-09-20 23:22:33,186 INFO L231 Difference]: Finished difference. Result has 155 places, 192 transitions, 1542 flow [2022-09-20 23:22:33,186 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1542, PETRI_PLACES=155, PETRI_TRANSITIONS=192} [2022-09-20 23:22:33,187 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 81 predicate places. [2022-09-20 23:22:33,187 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 192 transitions, 1542 flow [2022-09-20 23:22:33,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 64.3125) internal successors, (1029), 16 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:33,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:22:33,188 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:22:33,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-09-20 23:22:33,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:22:33,404 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:22:33,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:22:33,404 INFO L85 PathProgramCache]: Analyzing trace with hash 771678427, now seen corresponding path program 3 times [2022-09-20 23:22:33,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:22:33,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983718092] [2022-09-20 23:22:33,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:22:33,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:22:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:22:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:33,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:22:33,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983718092] [2022-09-20 23:22:33,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983718092] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:22:33,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153719162] [2022-09-20 23:22:33,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 23:22:33,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:22:33,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:22:33,587 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 23:22:33,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-09-20 23:22:33,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-09-20 23:22:33,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:22:33,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 23:22:33,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:22:33,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:33,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:22:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:34,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153719162] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:22:34,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:22:34,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-09-20 23:22:34,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133680736] [2022-09-20 23:22:34,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:22:34,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-09-20 23:22:34,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:22:34,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-09-20 23:22:34,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-09-20 23:22:34,029 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 23:22:34,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 192 transitions, 1542 flow. Second operand has 17 states, 17 states have (on average 64.05882352941177) internal successors, (1089), 17 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:34,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:22:34,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 23:22:34,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:22:35,036 INFO L130 PetriNetUnfolder]: 436/1119 cut-off events. [2022-09-20 23:22:35,037 INFO L131 PetriNetUnfolder]: For 10914/10929 co-relation queries the response was YES. [2022-09-20 23:22:35,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6130 conditions, 1119 events. 436/1119 cut-off events. For 10914/10929 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6500 event pairs, 10 based on Foata normal form. 7/1124 useless extension candidates. Maximal degree in co-relation 5927. Up to 281 conditions per place. [2022-09-20 23:22:35,052 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 134 selfloop transitions, 208 changer transitions 4/406 dead transitions. [2022-09-20 23:22:35,052 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 406 transitions, 4840 flow [2022-09-20 23:22:35,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-09-20 23:22:35,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-09-20 23:22:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1973 transitions. [2022-09-20 23:22:35,057 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7829365079365079 [2022-09-20 23:22:35,057 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1973 transitions. [2022-09-20 23:22:35,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1973 transitions. [2022-09-20 23:22:35,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:22:35,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1973 transitions. [2022-09-20 23:22:35,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 65.76666666666667) internal successors, (1973), 30 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:35,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 84.0) internal successors, (2604), 31 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:35,067 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 84.0) internal successors, (2604), 31 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:35,067 INFO L175 Difference]: Start difference. First operand has 155 places, 192 transitions, 1542 flow. Second operand 30 states and 1973 transitions. [2022-09-20 23:22:35,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 406 transitions, 4840 flow [2022-09-20 23:22:35,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 406 transitions, 4463 flow, removed 179 selfloop flow, removed 2 redundant places. [2022-09-20 23:22:35,125 INFO L231 Difference]: Finished difference. Result has 199 places, 340 transitions, 3882 flow [2022-09-20 23:22:35,125 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3882, PETRI_PLACES=199, PETRI_TRANSITIONS=340} [2022-09-20 23:22:35,126 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 125 predicate places. [2022-09-20 23:22:35,126 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 340 transitions, 3882 flow [2022-09-20 23:22:35,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.05882352941177) internal successors, (1089), 17 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:35,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:22:35,127 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:22:35,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-09-20 23:22:35,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:22:35,344 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:22:35,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:22:35,344 INFO L85 PathProgramCache]: Analyzing trace with hash -669783597, now seen corresponding path program 4 times [2022-09-20 23:22:35,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:22:35,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694660166] [2022-09-20 23:22:35,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:22:35,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:22:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:22:35,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:35,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:22:35,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694660166] [2022-09-20 23:22:35,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694660166] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:22:35,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739945341] [2022-09-20 23:22:35,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 23:22:35,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:22:35,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:22:35,494 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 23:22:35,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-09-20 23:22:35,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 23:22:35,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:22:35,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 23:22:35,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:22:35,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:35,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:22:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:35,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739945341] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:22:35,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:22:35,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-09-20 23:22:35,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635015605] [2022-09-20 23:22:35,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:22:35,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-20 23:22:35,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:22:35,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-20 23:22:35,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-09-20 23:22:35,909 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 23:22:35,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 340 transitions, 3882 flow. Second operand has 18 states, 18 states have (on average 63.94444444444444) internal successors, (1151), 18 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:35,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:22:35,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 23:22:35,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:22:36,765 INFO L130 PetriNetUnfolder]: 573/1484 cut-off events. [2022-09-20 23:22:36,765 INFO L131 PetriNetUnfolder]: For 19248/19272 co-relation queries the response was YES. [2022-09-20 23:22:36,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9395 conditions, 1484 events. 573/1484 cut-off events. For 19248/19272 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9476 event pairs, 15 based on Foata normal form. 10/1491 useless extension candidates. Maximal degree in co-relation 9075. Up to 362 conditions per place. [2022-09-20 23:22:36,794 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 146 selfloop transitions, 286 changer transitions 6/498 dead transitions. [2022-09-20 23:22:36,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 498 transitions, 7097 flow [2022-09-20 23:22:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-09-20 23:22:36,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-09-20 23:22:36,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1451 transitions. [2022-09-20 23:22:36,798 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7851731601731602 [2022-09-20 23:22:36,799 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1451 transitions. [2022-09-20 23:22:36,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1451 transitions. [2022-09-20 23:22:36,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:22:36,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1451 transitions. [2022-09-20 23:22:36,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.95454545454545) internal successors, (1451), 22 states have internal predecessors, (1451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:36,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:36,835 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 84.0) internal successors, (1932), 23 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:36,835 INFO L175 Difference]: Start difference. First operand has 199 places, 340 transitions, 3882 flow. Second operand 22 states and 1451 transitions. [2022-09-20 23:22:36,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 498 transitions, 7097 flow [2022-09-20 23:22:36,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 498 transitions, 6309 flow, removed 261 selfloop flow, removed 12 redundant places. [2022-09-20 23:22:36,981 INFO L231 Difference]: Finished difference. Result has 217 places, 449 transitions, 6026 flow [2022-09-20 23:22:36,981 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=3397, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6026, PETRI_PLACES=217, PETRI_TRANSITIONS=449} [2022-09-20 23:22:36,982 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 143 predicate places. [2022-09-20 23:22:36,982 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 449 transitions, 6026 flow [2022-09-20 23:22:36,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.94444444444444) internal successors, (1151), 18 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:36,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:22:36,983 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:22:37,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-09-20 23:22:37,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:22:37,207 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:22:37,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:22:37,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1640743273, now seen corresponding path program 5 times [2022-09-20 23:22:37,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:22:37,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786349092] [2022-09-20 23:22:37,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:22:37,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:22:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:22:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:37,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:22:37,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786349092] [2022-09-20 23:22:37,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786349092] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:22:37,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098753849] [2022-09-20 23:22:37,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 23:22:37,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:22:37,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:22:37,441 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 23:22:37,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-09-20 23:22:37,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 23:22:37,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:22:37,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 11 conjunts are in the unsatisfiable core [2022-09-20 23:22:37,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:22:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:37,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:22:37,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:37,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098753849] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:22:37,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:22:37,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 22 [2022-09-20 23:22:37,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827494700] [2022-09-20 23:22:37,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:22:37,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-09-20 23:22:37,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:22:37,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-09-20 23:22:37,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-09-20 23:22:37,995 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 23:22:37,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 449 transitions, 6026 flow. Second operand has 22 states, 22 states have (on average 64.13636363636364) internal successors, (1411), 22 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:37,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:22:37,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 23:22:37,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:22:42,525 INFO L130 PetriNetUnfolder]: 748/2060 cut-off events. [2022-09-20 23:22:42,525 INFO L131 PetriNetUnfolder]: For 24907/24935 co-relation queries the response was YES. [2022-09-20 23:22:42,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12233 conditions, 2060 events. 748/2060 cut-off events. For 24907/24935 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14975 event pairs, 17 based on Foata normal form. 29/2075 useless extension candidates. Maximal degree in co-relation 11881. Up to 466 conditions per place. [2022-09-20 23:22:42,566 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 126 selfloop transitions, 589 changer transitions 4/779 dead transitions. [2022-09-20 23:22:42,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 779 transitions, 12606 flow [2022-09-20 23:22:42,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-09-20 23:22:42,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2022-09-20 23:22:42,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 5211 transitions. [2022-09-20 23:22:42,578 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7754464285714285 [2022-09-20 23:22:42,578 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 5211 transitions. [2022-09-20 23:22:42,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 5211 transitions. [2022-09-20 23:22:42,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:22:42,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 5211 transitions. [2022-09-20 23:22:42,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 65.1375) internal successors, (5211), 80 states have internal predecessors, (5211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:42,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 84.0) internal successors, (6804), 81 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:42,607 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 84.0) internal successors, (6804), 81 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:42,607 INFO L175 Difference]: Start difference. First operand has 217 places, 449 transitions, 6026 flow. Second operand 80 states and 5211 transitions. [2022-09-20 23:22:42,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 779 transitions, 12606 flow [2022-09-20 23:22:42,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 779 transitions, 12172 flow, removed 207 selfloop flow, removed 3 redundant places. [2022-09-20 23:22:42,799 INFO L231 Difference]: Finished difference. Result has 303 places, 699 transitions, 11255 flow [2022-09-20 23:22:42,800 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=5840, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=11255, PETRI_PLACES=303, PETRI_TRANSITIONS=699} [2022-09-20 23:22:42,801 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 229 predicate places. [2022-09-20 23:22:42,801 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 699 transitions, 11255 flow [2022-09-20 23:22:42,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 64.13636363636364) internal successors, (1411), 22 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:42,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:22:42,803 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:22:42,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-09-20 23:22:43,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:22:43,018 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:22:43,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:22:43,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1231529299, now seen corresponding path program 6 times [2022-09-20 23:22:43,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:22:43,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748955223] [2022-09-20 23:22:43,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:22:43,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:22:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:22:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:43,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:22:43,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748955223] [2022-09-20 23:22:43,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748955223] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:22:43,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969546112] [2022-09-20 23:22:43,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 23:22:43,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:22:43,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:22:43,166 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 23:22:43,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-09-20 23:22:43,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-09-20 23:22:43,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:22:43,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 23:22:43,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:22:43,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:43,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:22:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:43,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969546112] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:22:43,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:22:43,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-09-20 23:22:43,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520227728] [2022-09-20 23:22:43,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:22:43,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-20 23:22:43,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:22:43,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-20 23:22:43,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-09-20 23:22:43,580 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 23:22:43,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 699 transitions, 11255 flow. Second operand has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:43,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:22:43,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 23:22:43,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:22:45,471 INFO L130 PetriNetUnfolder]: 1010/2805 cut-off events. [2022-09-20 23:22:45,471 INFO L131 PetriNetUnfolder]: For 33862/33888 co-relation queries the response was YES. [2022-09-20 23:22:45,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18192 conditions, 2805 events. 1010/2805 cut-off events. For 33862/33888 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 22455 event pairs, 14 based on Foata normal form. 21/2818 useless extension candidates. Maximal degree in co-relation 17825. Up to 668 conditions per place. [2022-09-20 23:22:45,529 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 275 selfloop transitions, 671 changer transitions 10/1016 dead transitions. [2022-09-20 23:22:45,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 1016 transitions, 18726 flow [2022-09-20 23:22:45,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-09-20 23:22:45,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-09-20 23:22:45,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2835 transitions. [2022-09-20 23:22:45,535 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7848837209302325 [2022-09-20 23:22:45,535 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2835 transitions. [2022-09-20 23:22:45,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2835 transitions. [2022-09-20 23:22:45,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:22:45,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2835 transitions. [2022-09-20 23:22:45,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 65.93023255813954) internal successors, (2835), 43 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:45,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 84.0) internal successors, (3696), 44 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:45,585 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 84.0) internal successors, (3696), 44 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:45,585 INFO L175 Difference]: Start difference. First operand has 303 places, 699 transitions, 11255 flow. Second operand 43 states and 2835 transitions. [2022-09-20 23:22:45,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 1016 transitions, 18726 flow [2022-09-20 23:22:45,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1016 transitions, 16491 flow, removed 980 selfloop flow, removed 15 redundant places. [2022-09-20 23:22:45,895 INFO L231 Difference]: Finished difference. Result has 346 places, 932 transitions, 16039 flow [2022-09-20 23:22:45,896 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=9759, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=438, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=16039, PETRI_PLACES=346, PETRI_TRANSITIONS=932} [2022-09-20 23:22:45,896 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 272 predicate places. [2022-09-20 23:22:45,896 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 932 transitions, 16039 flow [2022-09-20 23:22:45,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:45,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:22:45,897 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:22:45,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-09-20 23:22:46,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:22:46,112 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:22:46,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:22:46,112 INFO L85 PathProgramCache]: Analyzing trace with hash 794017323, now seen corresponding path program 7 times [2022-09-20 23:22:46,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:22:46,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418500257] [2022-09-20 23:22:46,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:22:46,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:22:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:22:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:46,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:22:46,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418500257] [2022-09-20 23:22:46,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418500257] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:22:46,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979364150] [2022-09-20 23:22:46,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 23:22:46,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:22:46,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:22:46,307 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 23:22:46,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-09-20 23:22:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:22:46,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 23:22:46,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:22:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:46,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:22:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:46,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979364150] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:22:46,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:22:46,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2022-09-20 23:22:46,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532524279] [2022-09-20 23:22:46,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:22:46,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-09-20 23:22:46,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:22:46,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-09-20 23:22:46,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-09-20 23:22:46,948 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 23:22:46,949 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 932 transitions, 16039 flow. Second operand has 21 states, 21 states have (on average 64.47619047619048) internal successors, (1354), 21 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:46,949 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:22:46,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 23:22:46,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:22:49,586 INFO L130 PetriNetUnfolder]: 1375/3968 cut-off events. [2022-09-20 23:22:49,586 INFO L131 PetriNetUnfolder]: For 42117/42141 co-relation queries the response was YES. [2022-09-20 23:22:49,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26032 conditions, 3968 events. 1375/3968 cut-off events. For 42117/42141 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 34777 event pairs, 29 based on Foata normal form. 51/4000 useless extension candidates. Maximal degree in co-relation 25388. Up to 867 conditions per place. [2022-09-20 23:22:49,653 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 339 selfloop transitions, 985 changer transitions 0/1384 dead transitions. [2022-09-20 23:22:49,653 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1384 transitions, 26574 flow [2022-09-20 23:22:49,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-09-20 23:22:49,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-09-20 23:22:49,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2328 transitions. [2022-09-20 23:22:49,657 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7918367346938775 [2022-09-20 23:22:49,657 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2328 transitions. [2022-09-20 23:22:49,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2328 transitions. [2022-09-20 23:22:49,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:22:49,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2328 transitions. [2022-09-20 23:22:49,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 66.51428571428572) internal successors, (2328), 35 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:49,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:49,666 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 84.0) internal successors, (3024), 36 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:49,666 INFO L175 Difference]: Start difference. First operand has 346 places, 932 transitions, 16039 flow. Second operand 35 states and 2328 transitions. [2022-09-20 23:22:49,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1384 transitions, 26574 flow [2022-09-20 23:22:50,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1384 transitions, 26256 flow, removed 99 selfloop flow, removed 5 redundant places. [2022-09-20 23:22:50,311 INFO L231 Difference]: Finished difference. Result has 388 places, 1266 transitions, 26096 flow [2022-09-20 23:22:50,312 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=15805, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=674, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=26096, PETRI_PLACES=388, PETRI_TRANSITIONS=1266} [2022-09-20 23:22:50,312 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 314 predicate places. [2022-09-20 23:22:50,313 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 1266 transitions, 26096 flow [2022-09-20 23:22:50,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.47619047619048) internal successors, (1354), 21 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:50,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:22:50,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:22:50,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-09-20 23:22:50,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-09-20 23:22:50,515 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:22:50,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:22:50,515 INFO L85 PathProgramCache]: Analyzing trace with hash 747457221, now seen corresponding path program 8 times [2022-09-20 23:22:50,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:22:50,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768659991] [2022-09-20 23:22:50,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:22:50,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:22:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:22:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:50,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:22:50,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768659991] [2022-09-20 23:22:50,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768659991] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:22:50,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793025420] [2022-09-20 23:22:50,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 23:22:50,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:22:50,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:22:50,680 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 23:22:50,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-09-20 23:22:50,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 23:22:50,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:22:50,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 23:22:50,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:22:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:50,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:22:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:51,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793025420] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:22:51,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:22:51,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-09-20 23:22:51,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402727598] [2022-09-20 23:22:51,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:22:51,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-09-20 23:22:51,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:22:51,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-09-20 23:22:51,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-09-20 23:22:51,285 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 23:22:51,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 1266 transitions, 26096 flow. Second operand has 17 states, 17 states have (on average 64.41176470588235) internal successors, (1095), 17 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:51,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:22:51,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 23:22:51,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:22:55,589 INFO L130 PetriNetUnfolder]: 1681/5101 cut-off events. [2022-09-20 23:22:55,589 INFO L131 PetriNetUnfolder]: For 71471/71498 co-relation queries the response was YES. [2022-09-20 23:22:55,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36827 conditions, 5101 events. 1681/5101 cut-off events. For 71471/71498 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 48393 event pairs, 39 based on Foata normal form. 54/5128 useless extension candidates. Maximal degree in co-relation 36353. Up to 1006 conditions per place. [2022-09-20 23:22:55,791 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 274 selfloop transitions, 1367 changer transitions 4/1705 dead transitions. [2022-09-20 23:22:55,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 1705 transitions, 37974 flow [2022-09-20 23:22:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-09-20 23:22:55,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-09-20 23:22:55,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 4465 transitions. [2022-09-20 23:22:55,799 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.781687675070028 [2022-09-20 23:22:55,799 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 4465 transitions. [2022-09-20 23:22:55,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 4465 transitions. [2022-09-20 23:22:55,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:22:55,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 4465 transitions. [2022-09-20 23:22:55,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 65.66176470588235) internal successors, (4465), 68 states have internal predecessors, (4465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:55,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 84.0) internal successors, (5796), 69 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:55,814 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 84.0) internal successors, (5796), 69 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:55,814 INFO L175 Difference]: Start difference. First operand has 388 places, 1266 transitions, 26096 flow. Second operand 68 states and 4465 transitions. [2022-09-20 23:22:55,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 1705 transitions, 37974 flow [2022-09-20 23:22:56,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1705 transitions, 37345 flow, removed 265 selfloop flow, removed 6 redundant places. [2022-09-20 23:22:56,881 INFO L231 Difference]: Finished difference. Result has 471 places, 1620 transitions, 38114 flow [2022-09-20 23:22:56,883 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=25681, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1043, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=38114, PETRI_PLACES=471, PETRI_TRANSITIONS=1620} [2022-09-20 23:22:56,883 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 397 predicate places. [2022-09-20 23:22:56,883 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 1620 transitions, 38114 flow [2022-09-20 23:22:56,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.41176470588235) internal successors, (1095), 17 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:56,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:22:56,884 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:22:56,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-09-20 23:22:57,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:22:57,084 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:22:57,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:22:57,085 INFO L85 PathProgramCache]: Analyzing trace with hash -319473689, now seen corresponding path program 9 times [2022-09-20 23:22:57,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:22:57,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525243570] [2022-09-20 23:22:57,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:22:57,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:22:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:22:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:57,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:22:57,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525243570] [2022-09-20 23:22:57,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525243570] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:22:57,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393152676] [2022-09-20 23:22:57,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 23:22:57,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:22:57,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:22:57,253 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 23:22:57,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-09-20 23:22:57,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-09-20 23:22:57,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:22:57,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 23:22:57,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:22:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:57,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:22:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:22:57,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393152676] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:22:57,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:22:57,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2022-09-20 23:22:57,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825935874] [2022-09-20 23:22:57,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:22:57,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-09-20 23:22:57,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:22:57,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-09-20 23:22:57,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-09-20 23:22:57,857 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 23:22:57,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 1620 transitions, 38114 flow. Second operand has 20 states, 20 states have (on average 64.35) internal successors, (1287), 20 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:22:57,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:22:57,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 23:22:57,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:23:02,386 INFO L130 PetriNetUnfolder]: 2047/6548 cut-off events. [2022-09-20 23:23:02,386 INFO L131 PetriNetUnfolder]: For 106042/106064 co-relation queries the response was YES. [2022-09-20 23:23:02,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51000 conditions, 6548 events. 2047/6548 cut-off events. For 106042/106064 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 66792 event pairs, 38 based on Foata normal form. 56/6577 useless extension candidates. Maximal degree in co-relation 50606. Up to 1208 conditions per place. [2022-09-20 23:23:02,514 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 374 selfloop transitions, 1652 changer transitions 0/2086 dead transitions. [2022-09-20 23:23:02,514 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 2086 transitions, 52747 flow [2022-09-20 23:23:02,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-09-20 23:23:02,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-09-20 23:23:02,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2531 transitions. [2022-09-20 23:23:02,517 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7929197994987469 [2022-09-20 23:23:02,517 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2531 transitions. [2022-09-20 23:23:02,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2531 transitions. [2022-09-20 23:23:02,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:23:02,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2531 transitions. [2022-09-20 23:23:02,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 66.60526315789474) internal successors, (2531), 38 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:23:02,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 84.0) internal successors, (3276), 39 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:23:02,526 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 84.0) internal successors, (3276), 39 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:23:02,526 INFO L175 Difference]: Start difference. First operand has 471 places, 1620 transitions, 38114 flow. Second operand 38 states and 2531 transitions. [2022-09-20 23:23:02,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 2086 transitions, 52747 flow [2022-09-20 23:23:04,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 2086 transitions, 51948 flow, removed 147 selfloop flow, removed 19 redundant places. [2022-09-20 23:23:04,689 INFO L231 Difference]: Finished difference. Result has 500 places, 1988 transitions, 52648 flow [2022-09-20 23:23:04,691 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=37279, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=52648, PETRI_PLACES=500, PETRI_TRANSITIONS=1988} [2022-09-20 23:23:04,693 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 426 predicate places. [2022-09-20 23:23:04,693 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 1988 transitions, 52648 flow [2022-09-20 23:23:04,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.35) internal successors, (1287), 20 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:23:04,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:23:04,694 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:23:04,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-09-20 23:23:04,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-09-20 23:23:04,907 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:23:04,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:23:04,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1311696009, now seen corresponding path program 10 times [2022-09-20 23:23:04,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:23:04,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316039130] [2022-09-20 23:23:04,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:23:04,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:23:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:23:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:23:05,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:23:05,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316039130] [2022-09-20 23:23:05,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316039130] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:23:05,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69564063] [2022-09-20 23:23:05,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 23:23:05,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:23:05,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:23:05,129 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 23:23:05,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-09-20 23:23:05,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 23:23:05,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:23:05,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 23:23:05,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:23:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:23:05,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:23:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:23:05,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69564063] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:23:05,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:23:05,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2022-09-20 23:23:05,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763244818] [2022-09-20 23:23:05,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:23:05,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-09-20 23:23:05,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:23:05,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-09-20 23:23:05,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-09-20 23:23:05,558 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 23:23:05,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 1988 transitions, 52648 flow. Second operand has 21 states, 21 states have (on average 64.23809523809524) internal successors, (1349), 21 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:23:05,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:23:05,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 23:23:05,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:23:13,067 INFO L130 PetriNetUnfolder]: 2520/8324 cut-off events. [2022-09-20 23:23:13,067 INFO L131 PetriNetUnfolder]: For 156166/156200 co-relation queries the response was YES. [2022-09-20 23:23:13,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70010 conditions, 8324 events. 2520/8324 cut-off events. For 156166/156200 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 89826 event pairs, 53 based on Foata normal form. 52/8347 useless extension candidates. Maximal degree in co-relation 69599. Up to 1437 conditions per place. [2022-09-20 23:23:13,262 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 409 selfloop transitions, 2075 changer transitions 14/2558 dead transitions. [2022-09-20 23:23:13,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 2558 transitions, 72674 flow [2022-09-20 23:23:13,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-09-20 23:23:13,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-09-20 23:23:13,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3261 transitions. [2022-09-20 23:23:13,266 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7922740524781341 [2022-09-20 23:23:13,266 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3261 transitions. [2022-09-20 23:23:13,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3261 transitions. [2022-09-20 23:23:13,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:23:13,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3261 transitions. [2022-09-20 23:23:13,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 66.55102040816327) internal successors, (3261), 49 states have internal predecessors, (3261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:23:13,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:23:13,282 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:23:13,282 INFO L175 Difference]: Start difference. First operand has 500 places, 1988 transitions, 52648 flow. Second operand 49 states and 3261 transitions. [2022-09-20 23:23:13,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 2558 transitions, 72674 flow [2022-09-20 23:23:17,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 2558 transitions, 71991 flow, removed 210 selfloop flow, removed 14 redundant places. [2022-09-20 23:23:17,238 INFO L231 Difference]: Finished difference. Result has 551 places, 2448 transitions, 72814 flow [2022-09-20 23:23:17,240 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=52043, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1985, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1656, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=72814, PETRI_PLACES=551, PETRI_TRANSITIONS=2448} [2022-09-20 23:23:17,242 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 477 predicate places. [2022-09-20 23:23:17,242 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 2448 transitions, 72814 flow [2022-09-20 23:23:17,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.23809523809524) internal successors, (1349), 21 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:23:17,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:23:17,243 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:23:17,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-09-20 23:23:17,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-09-20 23:23:17,459 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:23:17,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:23:17,460 INFO L85 PathProgramCache]: Analyzing trace with hash 207067439, now seen corresponding path program 11 times [2022-09-20 23:23:17,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:23:17,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765445111] [2022-09-20 23:23:17,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:23:17,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:23:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:23:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:23:17,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:23:17,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765445111] [2022-09-20 23:23:17,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765445111] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:23:17,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798221893] [2022-09-20 23:23:17,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 23:23:17,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:23:17,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:23:17,631 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 23:23:17,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-09-20 23:23:17,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-09-20 23:23:17,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:23:17,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2022-09-20 23:23:17,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:23:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:23:17,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:23:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:23:18,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798221893] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:23:18,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:23:18,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 21 [2022-09-20 23:23:18,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975560700] [2022-09-20 23:23:18,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:23:18,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-09-20 23:23:18,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:23:18,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-09-20 23:23:18,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-09-20 23:23:18,154 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 23:23:18,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 2448 transitions, 72814 flow. Second operand has 21 states, 21 states have (on average 63.904761904761905) internal successors, (1342), 21 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:23:18,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:23:18,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 23:23:18,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:23:29,185 INFO L130 PetriNetUnfolder]: 2698/9155 cut-off events. [2022-09-20 23:23:29,186 INFO L131 PetriNetUnfolder]: For 218291/218327 co-relation queries the response was YES. [2022-09-20 23:23:29,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84926 conditions, 9155 events. 2698/9155 cut-off events. For 218291/218327 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 101896 event pairs, 81 based on Foata normal form. 36/9173 useless extension candidates. Maximal degree in co-relation 84430. Up to 1512 conditions per place. [2022-09-20 23:23:29,407 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 254 selfloop transitions, 2519 changer transitions 10/2843 dead transitions. [2022-09-20 23:23:29,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 2843 transitions, 89434 flow [2022-09-20 23:23:29,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-09-20 23:23:29,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2022-09-20 23:23:29,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 5971 transitions. [2022-09-20 23:23:29,411 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7726449275362319 [2022-09-20 23:23:29,411 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 5971 transitions. [2022-09-20 23:23:29,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 5971 transitions. [2022-09-20 23:23:29,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:23:29,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 5971 transitions. [2022-09-20 23:23:29,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 64.90217391304348) internal successors, (5971), 92 states have internal predecessors, (5971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:23:29,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 84.0) internal successors, (7812), 93 states have internal predecessors, (7812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:23:29,428 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 84.0) internal successors, (7812), 93 states have internal predecessors, (7812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:23:29,428 INFO L175 Difference]: Start difference. First operand has 551 places, 2448 transitions, 72814 flow. Second operand 92 states and 5971 transitions. [2022-09-20 23:23:29,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 2843 transitions, 89434 flow [2022-09-20 23:23:34,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 622 places, 2843 transitions, 88727 flow, removed 164 selfloop flow, removed 20 redundant places. [2022-09-20 23:23:34,982 INFO L231 Difference]: Finished difference. Result has 634 places, 2799 transitions, 90117 flow [2022-09-20 23:23:34,983 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=71956, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=90117, PETRI_PLACES=634, PETRI_TRANSITIONS=2799} [2022-09-20 23:23:34,984 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 560 predicate places. [2022-09-20 23:23:34,984 INFO L495 AbstractCegarLoop]: Abstraction has has 634 places, 2799 transitions, 90117 flow [2022-09-20 23:23:34,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 63.904761904761905) internal successors, (1342), 21 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:23:34,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:23:34,984 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:23:35,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-09-20 23:23:35,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-09-20 23:23:35,195 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:23:35,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:23:35,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1545400653, now seen corresponding path program 12 times [2022-09-20 23:23:35,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:23:35,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399153104] [2022-09-20 23:23:35,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:23:35,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:23:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:23:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:23:35,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:23:35,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399153104] [2022-09-20 23:23:35,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399153104] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:23:35,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700792874] [2022-09-20 23:23:35,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 23:23:35,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:23:35,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:23:35,320 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 23:23:35,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-09-20 23:23:35,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-09-20 23:23:35,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:23:35,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 16 conjunts are in the unsatisfiable core [2022-09-20 23:23:35,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:23:35,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:23:35,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:23:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:23:35,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700792874] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:23:35,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:23:35,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 20 [2022-09-20 23:23:35,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273847812] [2022-09-20 23:23:35,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:23:35,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-09-20 23:23:35,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:23:35,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-09-20 23:23:35,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-09-20 23:23:35,729 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-09-20 23:23:35,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 2799 transitions, 90117 flow. Second operand has 20 states, 20 states have (on average 54.05) internal successors, (1081), 20 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:23:35,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:23:35,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-09-20 23:23:35,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:23:50,734 INFO L130 PetriNetUnfolder]: 3879/12084 cut-off events. [2022-09-20 23:23:50,734 INFO L131 PetriNetUnfolder]: For 379507/379518 co-relation queries the response was YES. [2022-09-20 23:23:50,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128492 conditions, 12084 events. 3879/12084 cut-off events. For 379507/379518 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 136024 event pairs, 208 based on Foata normal form. 121/12177 useless extension candidates. Maximal degree in co-relation 127526. Up to 2929 conditions per place. [2022-09-20 23:23:51,104 INFO L137 encePairwiseOnDemand]: 69/84 looper letters, 1463 selfloop transitions, 2848 changer transitions 28/4380 dead transitions. [2022-09-20 23:23:51,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 697 places, 4380 transitions, 150771 flow [2022-09-20 23:23:51,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-09-20 23:23:51,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-09-20 23:23:51,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3963 transitions. [2022-09-20 23:23:51,110 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6644869215291751 [2022-09-20 23:23:51,110 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3963 transitions. [2022-09-20 23:23:51,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3963 transitions. [2022-09-20 23:23:51,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:23:51,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3963 transitions. [2022-09-20 23:23:51,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 55.816901408450704) internal successors, (3963), 71 states have internal predecessors, (3963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:23:51,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:23:51,125 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:23:51,125 INFO L175 Difference]: Start difference. First operand has 634 places, 2799 transitions, 90117 flow. Second operand 71 states and 3963 transitions. [2022-09-20 23:23:51,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 697 places, 4380 transitions, 150771 flow [2022-09-20 23:24:01,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 646 places, 4380 transitions, 148838 flow, removed 412 selfloop flow, removed 51 redundant places. [2022-09-20 23:24:01,718 INFO L231 Difference]: Finished difference. Result has 694 places, 4045 transitions, 143977 flow [2022-09-20 23:24:01,720 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=88205, PETRI_DIFFERENCE_MINUEND_PLACES=576, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1724, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=741, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=143977, PETRI_PLACES=694, PETRI_TRANSITIONS=4045} [2022-09-20 23:24:01,721 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 620 predicate places. [2022-09-20 23:24:01,721 INFO L495 AbstractCegarLoop]: Abstraction has has 694 places, 4045 transitions, 143977 flow [2022-09-20 23:24:01,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.05) internal successors, (1081), 20 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:24:01,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:24:01,721 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:24:01,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-09-20 23:24:01,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-09-20 23:24:01,922 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:24:01,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:24:01,922 INFO L85 PathProgramCache]: Analyzing trace with hash 738570641, now seen corresponding path program 13 times [2022-09-20 23:24:01,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:24:01,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871439139] [2022-09-20 23:24:01,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:24:01,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:24:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:24:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:24:02,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:24:02,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871439139] [2022-09-20 23:24:02,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871439139] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:24:02,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420290694] [2022-09-20 23:24:02,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 23:24:02,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:24:02,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:24:02,050 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 23:24:02,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-09-20 23:24:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:24:02,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 23:24:02,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:24:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:24:02,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:24:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:24:02,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420290694] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:24:02,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:24:02,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-09-20 23:24:02,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584006495] [2022-09-20 23:24:02,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:24:02,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-20 23:24:02,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:24:02,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-20 23:24:02,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-09-20 23:24:02,495 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 23:24:02,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 694 places, 4045 transitions, 143977 flow. Second operand has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:24:02,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:24:02,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 23:24:02,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:24:23,642 INFO L130 PetriNetUnfolder]: 4018/12381 cut-off events. [2022-09-20 23:24:23,642 INFO L131 PetriNetUnfolder]: For 464622/464776 co-relation queries the response was YES. [2022-09-20 23:24:23,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143556 conditions, 12381 events. 4018/12381 cut-off events. For 464622/464776 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 139310 event pairs, 190 based on Foata normal form. 149/12504 useless extension candidates. Maximal degree in co-relation 142867. Up to 3001 conditions per place. [2022-09-20 23:24:24,009 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 1444 selfloop transitions, 2862 changer transitions 19/4418 dead transitions. [2022-09-20 23:24:24,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 740 places, 4418 transitions, 163683 flow [2022-09-20 23:24:24,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-09-20 23:24:24,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-09-20 23:24:24,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3348 transitions. [2022-09-20 23:24:24,011 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7815126050420168 [2022-09-20 23:24:24,011 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3348 transitions. [2022-09-20 23:24:24,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3348 transitions. [2022-09-20 23:24:24,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:24:24,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3348 transitions. [2022-09-20 23:24:24,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 65.6470588235294) internal successors, (3348), 51 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:24:24,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 84.0) internal successors, (4368), 52 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:24:24,019 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 84.0) internal successors, (4368), 52 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:24:24,019 INFO L175 Difference]: Start difference. First operand has 694 places, 4045 transitions, 143977 flow. Second operand 51 states and 3348 transitions. [2022-09-20 23:24:24,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 740 places, 4418 transitions, 163683 flow [2022-09-20 23:24:38,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 733 places, 4418 transitions, 162180 flow, removed 640 selfloop flow, removed 7 redundant places. [2022-09-20 23:24:38,495 INFO L231 Difference]: Finished difference. Result has 748 places, 4347 transitions, 162830 flow [2022-09-20 23:24:38,499 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142363, PETRI_DIFFERENCE_MINUEND_PLACES=683, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4038, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2564, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=162830, PETRI_PLACES=748, PETRI_TRANSITIONS=4347} [2022-09-20 23:24:38,499 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 674 predicate places. [2022-09-20 23:24:38,499 INFO L495 AbstractCegarLoop]: Abstraction has has 748 places, 4347 transitions, 162830 flow [2022-09-20 23:24:38,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:24:38,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:24:38,500 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:24:38,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-09-20 23:24:38,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:24:38,726 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:24:38,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:24:38,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1418228469, now seen corresponding path program 14 times [2022-09-20 23:24:38,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:24:38,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502880964] [2022-09-20 23:24:38,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:24:38,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:24:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:24:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:24:38,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:24:38,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502880964] [2022-09-20 23:24:38,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502880964] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:24:38,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866832101] [2022-09-20 23:24:38,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 23:24:38,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:24:38,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:24:38,865 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 23:24:38,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-09-20 23:24:38,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 23:24:38,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:24:38,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 23:24:38,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:24:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:24:39,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:24:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:24:39,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866832101] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:24:39,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:24:39,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-09-20 23:24:39,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639564780] [2022-09-20 23:24:39,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:24:39,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-20 23:24:39,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:24:39,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-20 23:24:39,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-09-20 23:24:39,257 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 23:24:39,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 748 places, 4347 transitions, 162830 flow. Second operand has 18 states, 18 states have (on average 63.94444444444444) internal successors, (1151), 18 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:24:39,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:24:39,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 23:24:39,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:25:04,007 INFO L130 PetriNetUnfolder]: 4036/12339 cut-off events. [2022-09-20 23:25:04,007 INFO L131 PetriNetUnfolder]: For 528625/528737 co-relation queries the response was YES. [2022-09-20 23:25:04,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151135 conditions, 12339 events. 4036/12339 cut-off events. For 528625/528737 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 138362 event pairs, 186 based on Foata normal form. 113/12427 useless extension candidates. Maximal degree in co-relation 150932. Up to 2335 conditions per place. [2022-09-20 23:25:04,597 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 703 selfloop transitions, 3636 changer transitions 5/4437 dead transitions. [2022-09-20 23:25:04,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 779 places, 4437 transitions, 174299 flow [2022-09-20 23:25:04,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-09-20 23:25:04,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-09-20 23:25:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2699 transitions. [2022-09-20 23:25:04,600 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7836817653890824 [2022-09-20 23:25:04,600 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2699 transitions. [2022-09-20 23:25:04,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2699 transitions. [2022-09-20 23:25:04,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:25:04,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2699 transitions. [2022-09-20 23:25:04,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 65.82926829268293) internal successors, (2699), 41 states have internal predecessors, (2699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:25:04,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:25:04,608 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:25:04,608 INFO L175 Difference]: Start difference. First operand has 748 places, 4347 transitions, 162830 flow. Second operand 41 states and 2699 transitions. [2022-09-20 23:25:04,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 779 places, 4437 transitions, 174299 flow [2022-09-20 23:25:21,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 757 places, 4437 transitions, 171509 flow, removed 397 selfloop flow, removed 22 redundant places. [2022-09-20 23:25:21,927 INFO L231 Difference]: Finished difference. Result has 762 places, 4393 transitions, 171714 flow [2022-09-20 23:25:21,930 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=159778, PETRI_DIFFERENCE_MINUEND_PLACES=717, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3578, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=732, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=171714, PETRI_PLACES=762, PETRI_TRANSITIONS=4393} [2022-09-20 23:25:21,931 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 688 predicate places. [2022-09-20 23:25:21,931 INFO L495 AbstractCegarLoop]: Abstraction has has 762 places, 4393 transitions, 171714 flow [2022-09-20 23:25:21,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.94444444444444) internal successors, (1151), 18 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:25:21,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:25:21,931 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:25:21,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-09-20 23:25:22,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-09-20 23:25:22,138 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:25:22,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:25:22,138 INFO L85 PathProgramCache]: Analyzing trace with hash -131625837, now seen corresponding path program 15 times [2022-09-20 23:25:22,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:25:22,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212818647] [2022-09-20 23:25:22,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:25:22,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:25:22,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:25:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:25:22,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:25:22,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212818647] [2022-09-20 23:25:22,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212818647] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:25:22,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228618531] [2022-09-20 23:25:22,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 23:25:22,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:25:22,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:25:22,268 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 23:25:22,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-09-20 23:25:22,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-09-20 23:25:22,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:25:22,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 23:25:22,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:25:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:25:22,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:25:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:25:22,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228618531] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:25:22,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:25:22,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-09-20 23:25:22,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308569878] [2022-09-20 23:25:22,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:25:22,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-09-20 23:25:22,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:25:22,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-09-20 23:25:22,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-09-20 23:25:22,750 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 23:25:22,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 762 places, 4393 transitions, 171714 flow. Second operand has 17 states, 17 states have (on average 64.17647058823529) internal successors, (1091), 17 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:25:22,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:25:22,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 23:25:22,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:25:49,603 INFO L130 PetriNetUnfolder]: 4480/13696 cut-off events. [2022-09-20 23:25:49,603 INFO L131 PetriNetUnfolder]: For 620996/621120 co-relation queries the response was YES. [2022-09-20 23:25:49,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174239 conditions, 13696 events. 4480/13696 cut-off events. For 620996/621120 co-relation queries the response was YES. Maximal size of possible extension queue 899. Compared 156960 event pairs, 76 based on Foata normal form. 130/13783 useless extension candidates. Maximal degree in co-relation 174039. Up to 2563 conditions per place. [2022-09-20 23:25:50,001 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 992 selfloop transitions, 3957 changer transitions 4/5046 dead transitions. [2022-09-20 23:25:50,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 803 places, 5046 transitions, 207756 flow [2022-09-20 23:25:50,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-09-20 23:25:50,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-09-20 23:25:50,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3197 transitions. [2022-09-20 23:25:50,004 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.792906746031746 [2022-09-20 23:25:50,004 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3197 transitions. [2022-09-20 23:25:50,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3197 transitions. [2022-09-20 23:25:50,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:25:50,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3197 transitions. [2022-09-20 23:25:50,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 66.60416666666667) internal successors, (3197), 48 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:25:50,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:25:50,011 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 84.0) internal successors, (4116), 49 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:25:50,011 INFO L175 Difference]: Start difference. First operand has 762 places, 4393 transitions, 171714 flow. Second operand 48 states and 3197 transitions. [2022-09-20 23:25:50,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 803 places, 5046 transitions, 207756 flow [2022-09-20 23:26:10,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 780 places, 5046 transitions, 204871 flow, removed 196 selfloop flow, removed 23 redundant places. [2022-09-20 23:26:10,198 INFO L231 Difference]: Finished difference. Result has 793 places, 4910 transitions, 206049 flow [2022-09-20 23:26:10,201 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=168565, PETRI_DIFFERENCE_MINUEND_PLACES=733, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3449, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=809, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=206049, PETRI_PLACES=793, PETRI_TRANSITIONS=4910} [2022-09-20 23:26:10,202 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 719 predicate places. [2022-09-20 23:26:10,202 INFO L495 AbstractCegarLoop]: Abstraction has has 793 places, 4910 transitions, 206049 flow [2022-09-20 23:26:10,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.17647058823529) internal successors, (1091), 17 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:26:10,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:26:10,202 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:26:10,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-09-20 23:26:10,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-09-20 23:26:10,403 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:26:10,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:26:10,403 INFO L85 PathProgramCache]: Analyzing trace with hash 2026383557, now seen corresponding path program 16 times [2022-09-20 23:26:10,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:26:10,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324349462] [2022-09-20 23:26:10,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:26:10,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:26:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:26:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:26:10,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:26:10,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324349462] [2022-09-20 23:26:10,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324349462] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:26:10,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031335365] [2022-09-20 23:26:10,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 23:26:10,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:26:10,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:26:10,611 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 23:26:10,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-09-20 23:26:10,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 23:26:10,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:26:10,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 23:26:10,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:26:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:26:10,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:26:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:26:11,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031335365] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:26:11,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:26:11,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-09-20 23:26:11,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565500027] [2022-09-20 23:26:11,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:26:11,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-09-20 23:26:11,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:26:11,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-09-20 23:26:11,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2022-09-20 23:26:11,190 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 23:26:11,191 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 793 places, 4910 transitions, 206049 flow. Second operand has 21 states, 21 states have (on average 64.33333333333333) internal successors, (1351), 21 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:26:11,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:26:11,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 23:26:11,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:26:56,732 INFO L130 PetriNetUnfolder]: 6216/19484 cut-off events. [2022-09-20 23:26:56,733 INFO L131 PetriNetUnfolder]: For 1039912/1040045 co-relation queries the response was YES. [2022-09-20 23:26:57,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257871 conditions, 19484 events. 6216/19484 cut-off events. For 1039912/1040045 co-relation queries the response was YES. Maximal size of possible extension queue 1281. Compared 238922 event pairs, 141 based on Foata normal form. 176/19628 useless extension candidates. Maximal degree in co-relation 257662. Up to 3532 conditions per place. [2022-09-20 23:26:58,069 INFO L137 encePairwiseOnDemand]: 71/84 looper letters, 2078 selfloop transitions, 4896 changer transitions 1/7068 dead transitions. [2022-09-20 23:26:58,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 841 places, 7068 transitions, 309957 flow [2022-09-20 23:26:58,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-09-20 23:26:58,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-09-20 23:26:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3271 transitions. [2022-09-20 23:26:58,072 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7947035957240038 [2022-09-20 23:26:58,072 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3271 transitions. [2022-09-20 23:26:58,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3271 transitions. [2022-09-20 23:26:58,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:26:58,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3271 transitions. [2022-09-20 23:26:58,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 66.75510204081633) internal successors, (3271), 49 states have internal predecessors, (3271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:26:58,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:26:58,079 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:26:58,080 INFO L175 Difference]: Start difference. First operand has 793 places, 4910 transitions, 206049 flow. Second operand 49 states and 3271 transitions. [2022-09-20 23:26:58,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 841 places, 7068 transitions, 309957 flow [2022-09-20 23:27:37,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 821 places, 7068 transitions, 305905 flow, removed 226 selfloop flow, removed 20 redundant places. [2022-09-20 23:27:37,850 INFO L231 Difference]: Finished difference. Result has 850 places, 6547 transitions, 295258 flow [2022-09-20 23:27:37,854 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=203182, PETRI_DIFFERENCE_MINUEND_PLACES=773, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3387, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=295258, PETRI_PLACES=850, PETRI_TRANSITIONS=6547} [2022-09-20 23:27:37,855 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 776 predicate places. [2022-09-20 23:27:37,855 INFO L495 AbstractCegarLoop]: Abstraction has has 850 places, 6547 transitions, 295258 flow [2022-09-20 23:27:37,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 64.33333333333333) internal successors, (1351), 21 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:27:37,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:27:37,855 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:27:37,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-09-20 23:27:38,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:27:38,057 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:27:38,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:27:38,057 INFO L85 PathProgramCache]: Analyzing trace with hash -167690863, now seen corresponding path program 17 times [2022-09-20 23:27:38,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:27:38,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770102205] [2022-09-20 23:27:38,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:27:38,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:27:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:27:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:27:38,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:27:38,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770102205] [2022-09-20 23:27:38,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770102205] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:27:38,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71056397] [2022-09-20 23:27:38,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 23:27:38,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:27:38,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:27:38,176 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 23:27:38,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-09-20 23:27:38,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 23:27:38,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:27:38,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 23:27:38,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:27:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:27:38,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:27:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:27:38,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71056397] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:27:38,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:27:38,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-09-20 23:27:38,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518391411] [2022-09-20 23:27:38,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:27:38,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-09-20 23:27:38,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:27:38,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-09-20 23:27:38,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2022-09-20 23:27:38,626 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 23:27:38,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 850 places, 6547 transitions, 295258 flow. Second operand has 19 states, 19 states have (on average 64.0) internal successors, (1216), 19 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:27:38,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:27:38,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 23:27:38,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:29:01,222 INFO L130 PetriNetUnfolder]: 7430/22528 cut-off events. [2022-09-20 23:29:01,223 INFO L131 PetriNetUnfolder]: For 1466056/1466315 co-relation queries the response was YES. [2022-09-20 23:29:02,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325536 conditions, 22528 events. 7430/22528 cut-off events. For 1466056/1466315 co-relation queries the response was YES. Maximal size of possible extension queue 1481. Compared 279426 event pairs, 396 based on Foata normal form. 288/22666 useless extension candidates. Maximal degree in co-relation 325299. Up to 4202 conditions per place. [2022-09-20 23:29:03,185 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 2505 selfloop transitions, 5510 changer transitions 25/8133 dead transitions. [2022-09-20 23:29:03,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 890 places, 8133 transitions, 381665 flow [2022-09-20 23:29:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-09-20 23:29:03,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-09-20 23:29:03,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2722 transitions. [2022-09-20 23:29:03,188 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7903600464576074 [2022-09-20 23:29:03,188 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2722 transitions. [2022-09-20 23:29:03,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2722 transitions. [2022-09-20 23:29:03,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:29:03,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2722 transitions. [2022-09-20 23:29:03,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 66.39024390243902) internal successors, (2722), 41 states have internal predecessors, (2722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:29:03,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:29:03,193 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 84.0) internal successors, (3528), 42 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:29:03,193 INFO L175 Difference]: Start difference. First operand has 850 places, 6547 transitions, 295258 flow. Second operand 41 states and 2722 transitions. [2022-09-20 23:29:03,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 890 places, 8133 transitions, 381665 flow [2022-09-20 23:30:15,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 884 places, 8133 transitions, 376236 flow, removed 2215 selfloop flow, removed 6 redundant places. [2022-09-20 23:30:15,936 INFO L231 Difference]: Finished difference. Result has 904 places, 7770 transitions, 370480 flow [2022-09-20 23:30:15,941 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=290982, PETRI_DIFFERENCE_MINUEND_PLACES=844, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4360, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1788, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=370480, PETRI_PLACES=904, PETRI_TRANSITIONS=7770} [2022-09-20 23:30:15,942 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 830 predicate places. [2022-09-20 23:30:15,942 INFO L495 AbstractCegarLoop]: Abstraction has has 904 places, 7770 transitions, 370480 flow [2022-09-20 23:30:15,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.0) internal successors, (1216), 19 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:30:15,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:30:15,942 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:30:15,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-09-20 23:30:16,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:30:16,143 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:30:16,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:30:16,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1913504033, now seen corresponding path program 18 times [2022-09-20 23:30:16,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:30:16,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213577258] [2022-09-20 23:30:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:30:16,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:30:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:30:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:30:16,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:30:16,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213577258] [2022-09-20 23:30:16,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213577258] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:30:16,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287167867] [2022-09-20 23:30:16,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 23:30:16,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:30:16,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:30:16,279 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 23:30:16,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-09-20 23:30:16,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-09-20 23:30:16,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 23:30:16,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 23:30:16,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:30:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:30:16,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:30:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:30:16,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287167867] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:30:16,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:30:16,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-09-20 23:30:16,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642142916] [2022-09-20 23:30:16,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:30:16,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-09-20 23:30:16,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:30:16,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-09-20 23:30:16,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2022-09-20 23:30:16,731 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 23:30:16,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 904 places, 7770 transitions, 370480 flow. Second operand has 19 states, 19 states have (on average 63.89473684210526) internal successors, (1214), 19 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:30:16,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:30:16,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 23:30:16,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:31:56,457 INFO L130 PetriNetUnfolder]: 7956/24178 cut-off events. [2022-09-20 23:31:56,458 INFO L131 PetriNetUnfolder]: For 1741778/1741905 co-relation queries the response was YES. [2022-09-20 23:31:57,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364224 conditions, 24178 events. 7956/24178 cut-off events. For 1741778/1741905 co-relation queries the response was YES. Maximal size of possible extension queue 1580. Compared 303499 event pairs, 217 based on Foata normal form. 145/24297 useless extension candidates. Maximal degree in co-relation 363970. Up to 3966 conditions per place. [2022-09-20 23:31:57,879 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 1572 selfloop transitions, 7009 changer transitions 17/8691 dead transitions. [2022-09-20 23:31:57,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 963 places, 8691 transitions, 426797 flow [2022-09-20 23:31:57,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-09-20 23:31:57,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-09-20 23:31:57,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 4017 transitions. [2022-09-20 23:31:57,884 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7839578454332553 [2022-09-20 23:31:57,884 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 4017 transitions. [2022-09-20 23:31:57,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 4017 transitions. [2022-09-20 23:31:57,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 23:31:57,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 4017 transitions. [2022-09-20 23:31:57,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 65.85245901639344) internal successors, (4017), 61 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:57,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 84.0) internal successors, (5208), 62 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:57,892 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 84.0) internal successors, (5208), 62 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:31:57,892 INFO L175 Difference]: Start difference. First operand has 904 places, 7770 transitions, 370480 flow. Second operand 61 states and 4017 transitions. [2022-09-20 23:31:57,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 963 places, 8691 transitions, 426797 flow [2022-09-20 23:33:29,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 956 places, 8691 transitions, 425284 flow, removed 563 selfloop flow, removed 7 redundant places. [2022-09-20 23:33:29,539 INFO L231 Difference]: Finished difference. Result has 982 places, 8449 transitions, 425970 flow [2022-09-20 23:33:29,545 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=368937, PETRI_DIFFERENCE_MINUEND_PLACES=896, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=425970, PETRI_PLACES=982, PETRI_TRANSITIONS=8449} [2022-09-20 23:33:29,545 INFO L287 CegarLoopForPetriNet]: 74 programPoint places, 908 predicate places. [2022-09-20 23:33:29,546 INFO L495 AbstractCegarLoop]: Abstraction has has 982 places, 8449 transitions, 425970 flow [2022-09-20 23:33:29,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.89473684210526) internal successors, (1214), 19 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:33:29,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 23:33:29,546 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 23:33:29,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-09-20 23:33:29,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:33:29,770 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 23:33:29,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 23:33:29,770 INFO L85 PathProgramCache]: Analyzing trace with hash 5033705, now seen corresponding path program 19 times [2022-09-20 23:33:29,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 23:33:29,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949148996] [2022-09-20 23:33:29,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 23:33:29,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 23:33:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:33:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:33:29,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 23:33:29,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949148996] [2022-09-20 23:33:29,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949148996] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 23:33:29,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92635750] [2022-09-20 23:33:29,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 23:33:29,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 23:33:29,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 23:33:29,922 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 23:33:29,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-09-20 23:33:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 23:33:30,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-09-20 23:33:30,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 23:33:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:33:30,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 23:33:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 23:33:30,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92635750] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 23:33:30,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 23:33:30,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-09-20 23:33:30,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746831972] [2022-09-20 23:33:30,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 23:33:30,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-09-20 23:33:30,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 23:33:30,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-09-20 23:33:30,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-09-20 23:33:30,403 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 84 [2022-09-20 23:33:30,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 982 places, 8449 transitions, 425970 flow. Second operand has 19 states, 19 states have (on average 63.94736842105263) internal successors, (1215), 19 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 23:33:30,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 23:33:30,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 84 [2022-09-20 23:33:30,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 23:35:22,723 INFO L130 PetriNetUnfolder]: 8253/25321 cut-off events. [2022-09-20 23:35:22,724 INFO L131 PetriNetUnfolder]: For 2045902/2046106 co-relation queries the response was YES. Received shutdown request... [2022-09-20 23:35:22,981 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-09-20 23:35:22,981 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-09-20 23:35:24,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2022-09-20 23:35:24,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-09-20 23:35:24,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398998 conditions, 25321 events. 8253/25321 cut-off events. For 2045902/2046106 co-relation queries the response was YES. Maximal size of possible extension queue 1652. Compared 321610 event pairs, 228 based on Foata normal form. 185/25478 useless extension candidates. Maximal degree in co-relation 398719. Up to 4701 conditions per place. [2022-09-20 23:35:25,026 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 2017 selfloop transitions, 6895 changer transitions 17/9022 dead transitions. [2022-09-20 23:35:25,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1032 places, 9022 transitions, 470295 flow [2022-09-20 23:35:25,028 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-09-20 23:35:25,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-09-20 23:35:25,028 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2022-09-20 23:35:25,030 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-09-20 23:35:25,030 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-09-20 23:35:25,030 INFO L444 BasicCegarLoop]: Path program histogram: [19, 2, 1] [2022-09-20 23:35:25,033 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-09-20 23:35:25,033 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-09-20 23:35:25,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 11:35:25 BasicIcfg [2022-09-20 23:35:25,036 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-09-20 23:35:25,037 INFO L158 Benchmark]: Toolchain (without parser) took 778013.48ms. Allocated memory was 166.7MB in the beginning and 7.2GB in the end (delta: 7.0GB). Free memory was 110.7MB in the beginning and 5.5GB in the end (delta: -5.4GB). Peak memory consumption was 3.4GB. Max. memory is 8.0GB. [2022-09-20 23:35:25,037 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 166.7MB. Free memory was 126.7MB in the beginning and 126.5MB in the end (delta: 136.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-09-20 23:35:25,037 INFO L158 Benchmark]: CACSL2BoogieTranslator took 329.87ms. Allocated memory was 166.7MB in the beginning and 202.4MB in the end (delta: 35.7MB). Free memory was 144.9MB in the beginning and 176.0MB in the end (delta: -31.1MB). Peak memory consumption was 7.5MB. Max. memory is 8.0GB. [2022-09-20 23:35:25,038 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.77ms. Allocated memory is still 202.4MB. Free memory was 176.0MB in the beginning and 174.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-09-20 23:35:25,038 INFO L158 Benchmark]: Boogie Preprocessor took 38.57ms. Allocated memory is still 202.4MB. Free memory was 174.4MB in the beginning and 173.4MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-09-20 23:35:25,038 INFO L158 Benchmark]: RCFGBuilder took 387.02ms. Allocated memory is still 202.4MB. Free memory was 173.4MB in the beginning and 160.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-09-20 23:35:25,038 INFO L158 Benchmark]: TraceAbstraction took 777203.75ms. Allocated memory was 202.4MB in the beginning and 7.2GB in the end (delta: 7.0GB). Free memory was 160.1MB in the beginning and 5.5GB in the end (delta: -5.3GB). Peak memory consumption was 3.4GB. Max. memory is 8.0GB. [2022-09-20 23:35:25,040 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 166.7MB. Free memory was 126.7MB in the beginning and 126.5MB in the end (delta: 136.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 329.87ms. Allocated memory was 166.7MB in the beginning and 202.4MB in the end (delta: 35.7MB). Free memory was 144.9MB in the beginning and 176.0MB in the end (delta: -31.1MB). Peak memory consumption was 7.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 33.77ms. Allocated memory is still 202.4MB. Free memory was 176.0MB in the beginning and 174.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.57ms. Allocated memory is still 202.4MB. Free memory was 174.4MB in the beginning and 173.4MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 387.02ms. Allocated memory is still 202.4MB. Free memory was 173.4MB in the beginning and 160.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 777203.75ms. Allocated memory was 202.4MB in the beginning and 7.2GB in the end (delta: 7.0GB). Free memory was 160.1MB in the beginning and 5.5GB in the end (delta: -5.3GB). Peak memory consumption was 3.4GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - 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 Executor. - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 96 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 777.1s, OverallIterations: 22, TraceHistogramMax: 2, PathProgramHistogramMax: 19, EmptinessCheckTime: 0.0s, AutomataDifference: 759.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2948 SdHoareTripleChecker+Valid, 11.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2948 mSDsluCounter, 2097 SdHoareTripleChecker+Invalid, 9.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2964 mSDsCounter, 1250 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9723 IncrementalHoareTripleChecker+Invalid, 10973 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1250 mSolverCounterUnsat, 417 mSDtfsCounter, 9723 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3713 GetRequests, 2634 SyntacticMatches, 26 SemanticMatches, 1053 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21304 ImplicationChecksByTransitivity, 29.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=425970occurred in iteration=21, InterpolantAutomatonStates: 892, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 11.2s InterpolantComputationTime, 2972 NumberOfCodeBlocks, 2857 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 4274 ConstructedInterpolants, 0 QuantifiedInterpolants, 20260 SizeOfPredicates, 210 NumberOfNonLiveVariables, 2895 ConjunctsInSsa, 240 ConjunctsInUnsatCore, 61 InterpolantComputations, 3 PerfectInterpolantSequences, 244/441 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