/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/parallel-misc-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-0612a5f-m [2022-09-20 21:01:15,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-20 21:01:15,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-20 21:01:15,755 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-20 21:01:15,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-20 21:01:15,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-20 21:01:15,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-20 21:01:15,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-20 21:01:15,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-20 21:01:15,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-20 21:01:15,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-20 21:01:15,772 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-20 21:01:15,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-20 21:01:15,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-20 21:01:15,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-20 21:01:15,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-20 21:01:15,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-20 21:01:15,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-20 21:01:15,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-20 21:01:15,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-20 21:01:15,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-20 21:01:15,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-20 21:01:15,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-20 21:01:15,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-20 21:01:15,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-20 21:01:15,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-20 21:01:15,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-20 21:01:15,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-20 21:01:15,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-20 21:01:15,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-20 21:01:15,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-20 21:01:15,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-20 21:01:15,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-20 21:01:15,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-20 21:01:15,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-20 21:01:15,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-20 21:01:15,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-20 21:01:15,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-20 21:01:15,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-20 21:01:15,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-20 21:01:15,804 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-20 21:01:15,805 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2022-09-20 21:01:15,834 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-20 21:01:15,834 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-20 21:01:15,835 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-20 21:01:15,835 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-20 21:01:15,836 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-20 21:01:15,836 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-20 21:01:15,836 INFO L138 SettingsManager]: * Use SBE=true [2022-09-20 21:01:15,836 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-20 21:01:15,836 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-20 21:01:15,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-20 21:01:15,837 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-20 21:01:15,837 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-20 21:01:15,837 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-20 21:01:15,838 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-20 21:01:15,838 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-20 21:01:15,838 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-20 21:01:15,838 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-20 21:01:15,838 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-20 21:01:15,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-20 21:01:15,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-20 21:01:15,838 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-20 21:01:15,839 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-20 21:01:15,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-20 21:01:15,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 21:01:15,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-20 21:01:15,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-20 21:01:15,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-20 21:01:15,840 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-20 21:01:15,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-20 21:01:15,840 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-20 21:01:15,841 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-20 21:01:15,841 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-20 21:01:16,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-20 21:01:16,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-20 21:01:16,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-20 21:01:16,077 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-20 21:01:16,077 INFO L275 PluginConnector]: CDTParser initialized [2022-09-20 21:01:16,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c [2022-09-20 21:01:16,136 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e10e84529/fabacf0222fb4b52843389bb28273263/FLAG870f1baad [2022-09-20 21:01:16,493 INFO L306 CDTParser]: Found 1 translation units. [2022-09-20 21:01:16,494 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c [2022-09-20 21:01:16,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e10e84529/fabacf0222fb4b52843389bb28273263/FLAG870f1baad [2022-09-20 21:01:16,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e10e84529/fabacf0222fb4b52843389bb28273263 [2022-09-20 21:01:16,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-20 21:01:16,517 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-20 21:01:16,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-20 21:01:16,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-20 21:01:16,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-20 21:01:16,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 09:01:16" (1/1) ... [2022-09-20 21:01:16,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62dab662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:01:16, skipping insertion in model container [2022-09-20 21:01:16,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 09:01:16" (1/1) ... [2022-09-20 21:01:16,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-20 21:01:16,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-20 21:01:16,712 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/parallel-misc-3.wvr.c[2410,2423] [2022-09-20 21:01:16,715 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 21:01:16,720 INFO L203 MainTranslator]: Completed pre-run [2022-09-20 21:01:16,736 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/parallel-misc-3.wvr.c[2410,2423] [2022-09-20 21:01:16,737 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 21:01:16,749 INFO L208 MainTranslator]: Completed translation [2022-09-20 21:01:16,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:01:16 WrapperNode [2022-09-20 21:01:16,751 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-20 21:01:16,753 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-20 21:01:16,753 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-20 21:01:16,753 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-20 21:01:16,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:01:16" (1/1) ... [2022-09-20 21:01:16,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:01:16" (1/1) ... [2022-09-20 21:01:16,791 INFO L138 Inliner]: procedures = 21, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2022-09-20 21:01:16,792 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-20 21:01:16,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-20 21:01:16,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-20 21:01:16,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-20 21:01:16,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:01:16" (1/1) ... [2022-09-20 21:01:16,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:01:16" (1/1) ... [2022-09-20 21:01:16,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:01:16" (1/1) ... [2022-09-20 21:01:16,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:01:16" (1/1) ... [2022-09-20 21:01:16,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:01:16" (1/1) ... [2022-09-20 21:01:16,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:01:16" (1/1) ... [2022-09-20 21:01:16,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:01:16" (1/1) ... [2022-09-20 21:01:16,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-20 21:01:16,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-20 21:01:16,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-20 21:01:16,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-20 21:01:16,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:01:16" (1/1) ... [2022-09-20 21:01:16,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 21:01:16,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:01:16,848 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-09-20 21:01:16,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-20 21:01:16,891 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-20 21:01:16,891 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-20 21:01:16,891 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-20 21:01:16,891 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-20 21:01:16,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-20 21:01:16,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-20 21:01:16,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-20 21:01:16,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-20 21:01:16,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-20 21:01:16,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-20 21:01:16,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-20 21:01:16,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-20 21:01:16,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-20 21:01:16,894 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-20 21:01:16,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-09-20 21:01:16,978 INFO L234 CfgBuilder]: Building ICFG [2022-09-20 21:01:16,979 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-20 21:01:17,107 INFO L275 CfgBuilder]: Performing block encoding [2022-09-20 21:01:17,126 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-20 21:01:17,126 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-09-20 21:01:17,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 09:01:17 BoogieIcfgContainer [2022-09-20 21:01:17,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-20 21:01:17,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-20 21:01:17,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-20 21:01:17,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-20 21:01:17,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 09:01:16" (1/3) ... [2022-09-20 21:01:17,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e14995c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 09:01:17, skipping insertion in model container [2022-09-20 21:01:17,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:01:16" (2/3) ... [2022-09-20 21:01:17,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e14995c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 09:01:17, skipping insertion in model container [2022-09-20 21:01:17,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 09:01:17" (3/3) ... [2022-09-20 21:01:17,135 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3.wvr.c [2022-09-20 21:01:17,150 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-20 21:01:17,151 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-09-20 21:01:17,151 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-20 21:01:17,215 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-09-20 21:01:17,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 95 transitions, 206 flow [2022-09-20 21:01:17,338 INFO L130 PetriNetUnfolder]: 11/93 cut-off events. [2022-09-20 21:01:17,339 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-20 21:01:17,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 93 events. 11/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 90 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 51. Up to 4 conditions per place. [2022-09-20 21:01:17,343 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 95 transitions, 206 flow [2022-09-20 21:01:17,348 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 84 transitions, 180 flow [2022-09-20 21:01:17,363 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 21:01:17,370 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;@75541fa0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 21:01:17,371 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-09-20 21:01:17,403 INFO L130 PetriNetUnfolder]: 11/83 cut-off events. [2022-09-20 21:01:17,404 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-20 21:01:17,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:01:17,404 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] [2022-09-20 21:01:17,405 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:01:17,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:01:17,411 INFO L85 PathProgramCache]: Analyzing trace with hash 395361449, now seen corresponding path program 1 times [2022-09-20 21:01:17,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:01:17,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2850540] [2022-09-20 21:01:17,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:01:17,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:01:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:01:17,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:01:17,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:01:17,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2850540] [2022-09-20 21:01:17,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2850540] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:01:17,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:01:17,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 21:01:17,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332492488] [2022-09-20 21:01:17,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:01:17,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-09-20 21:01:17,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:01:17,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-09-20 21:01:17,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-09-20 21:01:17,716 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 95 [2022-09-20 21:01:17,718 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 180 flow. Second operand has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:17,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:01:17,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 95 [2022-09-20 21:01:17,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:01:17,776 INFO L130 PetriNetUnfolder]: 13/92 cut-off events. [2022-09-20 21:01:17,776 INFO L131 PetriNetUnfolder]: For 10/11 co-relation queries the response was YES. [2022-09-20 21:01:17,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 92 events. 13/92 cut-off events. For 10/11 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 123 event pairs, 1 based on Foata normal form. 6/86 useless extension candidates. Maximal degree in co-relation 62. Up to 10 conditions per place. [2022-09-20 21:01:17,778 INFO L137 encePairwiseOnDemand]: 92/95 looper letters, 6 selfloop transitions, 0 changer transitions 1/81 dead transitions. [2022-09-20 21:01:17,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 81 transitions, 186 flow [2022-09-20 21:01:17,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-20 21:01:17,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-09-20 21:01:17,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 179 transitions. [2022-09-20 21:01:17,795 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9421052631578948 [2022-09-20 21:01:17,795 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 179 transitions. [2022-09-20 21:01:17,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 179 transitions. [2022-09-20 21:01:17,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:01:17,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 179 transitions. [2022-09-20 21:01:17,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:17,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:17,809 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:17,810 INFO L175 Difference]: Start difference. First operand has 80 places, 84 transitions, 180 flow. Second operand 2 states and 179 transitions. [2022-09-20 21:01:17,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 81 transitions, 186 flow [2022-09-20 21:01:17,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 81 transitions, 178 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-09-20 21:01:17,816 INFO L231 Difference]: Finished difference. Result has 77 places, 80 transitions, 164 flow [2022-09-20 21:01:17,818 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=164, PETRI_PLACES=77, PETRI_TRANSITIONS=80} [2022-09-20 21:01:17,821 INFO L287 CegarLoopForPetriNet]: 80 programPoint places, -3 predicate places. [2022-09-20 21:01:17,821 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 80 transitions, 164 flow [2022-09-20 21:01:17,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:17,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:01:17,822 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] [2022-09-20 21:01:17,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-20 21:01:17,822 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:01:17,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:01:17,823 INFO L85 PathProgramCache]: Analyzing trace with hash 524444168, now seen corresponding path program 1 times [2022-09-20 21:01:17,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:01:17,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874720226] [2022-09-20 21:01:17,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:01:17,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:01:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:01:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:01:17,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:01:17,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874720226] [2022-09-20 21:01:17,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874720226] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:01:17,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:01:17,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 21:01:17,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477550340] [2022-09-20 21:01:17,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:01:17,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 21:01:17,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:01:17,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 21:01:17,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 21:01:17,935 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 95 [2022-09-20 21:01:17,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 80 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:17,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:01:17,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 95 [2022-09-20 21:01:17,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:01:18,004 INFO L130 PetriNetUnfolder]: 24/128 cut-off events. [2022-09-20 21:01:18,004 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-20 21:01:18,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 128 events. 24/128 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 273 event pairs, 2 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 166. Up to 20 conditions per place. [2022-09-20 21:01:18,005 INFO L137 encePairwiseOnDemand]: 92/95 looper letters, 14 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2022-09-20 21:01:18,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 85 transitions, 207 flow [2022-09-20 21:01:18,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 21:01:18,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 21:01:18,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2022-09-20 21:01:18,010 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9017543859649123 [2022-09-20 21:01:18,010 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2022-09-20 21:01:18,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2022-09-20 21:01:18,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:01:18,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2022-09-20 21:01:18,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,014 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,014 INFO L175 Difference]: Start difference. First operand has 77 places, 80 transitions, 164 flow. Second operand 3 states and 257 transitions. [2022-09-20 21:01:18,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 85 transitions, 207 flow [2022-09-20 21:01:18,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 85 transitions, 207 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 21:01:18,016 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 176 flow [2022-09-20 21:01:18,016 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2022-09-20 21:01:18,017 INFO L287 CegarLoopForPetriNet]: 80 programPoint places, -1 predicate places. [2022-09-20 21:01:18,017 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 176 flow [2022-09-20 21:01:18,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:01:18,018 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 21:01:18,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-20 21:01:18,018 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:01:18,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:01:18,019 INFO L85 PathProgramCache]: Analyzing trace with hash 2083579674, now seen corresponding path program 1 times [2022-09-20 21:01:18,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:01:18,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941472787] [2022-09-20 21:01:18,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:01:18,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:01:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:01:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:01:18,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:01:18,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941472787] [2022-09-20 21:01:18,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941472787] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:01:18,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:01:18,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 21:01:18,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650164124] [2022-09-20 21:01:18,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:01:18,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 21:01:18,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:01:18,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 21:01:18,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 21:01:18,091 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 95 [2022-09-20 21:01:18,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:01:18,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 95 [2022-09-20 21:01:18,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:01:18,133 INFO L130 PetriNetUnfolder]: 64/241 cut-off events. [2022-09-20 21:01:18,133 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-09-20 21:01:18,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 241 events. 64/241 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 743 event pairs, 5 based on Foata normal form. 0/198 useless extension candidates. Maximal degree in co-relation 310. Up to 34 conditions per place. [2022-09-20 21:01:18,135 INFO L137 encePairwiseOnDemand]: 92/95 looper letters, 14 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2022-09-20 21:01:18,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 86 transitions, 219 flow [2022-09-20 21:01:18,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 21:01:18,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 21:01:18,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2022-09-20 21:01:18,137 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9017543859649123 [2022-09-20 21:01:18,137 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2022-09-20 21:01:18,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2022-09-20 21:01:18,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:01:18,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2022-09-20 21:01:18,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,140 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,140 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 176 flow. Second operand 3 states and 257 transitions. [2022-09-20 21:01:18,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 86 transitions, 219 flow [2022-09-20 21:01:18,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 86 transitions, 217 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 21:01:18,143 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 186 flow [2022-09-20 21:01:18,143 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=81, PETRI_TRANSITIONS=82} [2022-09-20 21:01:18,144 INFO L287 CegarLoopForPetriNet]: 80 programPoint places, 1 predicate places. [2022-09-20 21:01:18,144 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 186 flow [2022-09-20 21:01:18,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:01:18,144 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, 1, 1, 1] [2022-09-20 21:01:18,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-09-20 21:01:18,145 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:01:18,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:01:18,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1003385844, now seen corresponding path program 1 times [2022-09-20 21:01:18,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:01:18,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174007557] [2022-09-20 21:01:18,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:01:18,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:01:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:01:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:01:18,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:01:18,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174007557] [2022-09-20 21:01:18,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174007557] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:01:18,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:01:18,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 21:01:18,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945319481] [2022-09-20 21:01:18,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:01:18,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 21:01:18,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:01:18,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 21:01:18,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 21:01:18,222 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 95 [2022-09-20 21:01:18,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:01:18,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 95 [2022-09-20 21:01:18,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:01:18,266 INFO L130 PetriNetUnfolder]: 41/187 cut-off events. [2022-09-20 21:01:18,266 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-09-20 21:01:18,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 187 events. 41/187 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 624 event pairs, 12 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 271. Up to 45 conditions per place. [2022-09-20 21:01:18,268 INFO L137 encePairwiseOnDemand]: 92/95 looper letters, 15 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2022-09-20 21:01:18,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 229 flow [2022-09-20 21:01:18,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 21:01:18,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 21:01:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2022-09-20 21:01:18,270 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8842105263157894 [2022-09-20 21:01:18,270 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 252 transitions. [2022-09-20 21:01:18,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 252 transitions. [2022-09-20 21:01:18,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:01:18,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 252 transitions. [2022-09-20 21:01:18,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,273 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 186 flow. Second operand 3 states and 252 transitions. [2022-09-20 21:01:18,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 229 flow [2022-09-20 21:01:18,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 86 transitions, 227 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 21:01:18,275 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 196 flow [2022-09-20 21:01:18,276 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2022-09-20 21:01:18,276 INFO L287 CegarLoopForPetriNet]: 80 programPoint places, 3 predicate places. [2022-09-20 21:01:18,276 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 196 flow [2022-09-20 21:01:18,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:01:18,277 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, 1, 1, 1] [2022-09-20 21:01:18,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-09-20 21:01:18,277 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:01:18,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:01:18,278 INFO L85 PathProgramCache]: Analyzing trace with hash -479723240, now seen corresponding path program 1 times [2022-09-20 21:01:18,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:01:18,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546889457] [2022-09-20 21:01:18,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:01:18,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:01:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:01:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:01:18,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:01:18,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546889457] [2022-09-20 21:01:18,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546889457] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:01:18,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:01:18,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-09-20 21:01:18,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578596098] [2022-09-20 21:01:18,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:01:18,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-20 21:01:18,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:01:18,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-20 21:01:18,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-20 21:01:18,394 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 95 [2022-09-20 21:01:18,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 196 flow. Second operand has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:01:18,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 95 [2022-09-20 21:01:18,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:01:18,479 INFO L130 PetriNetUnfolder]: 38/218 cut-off events. [2022-09-20 21:01:18,479 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-09-20 21:01:18,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 218 events. 38/218 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 803 event pairs, 9 based on Foata normal form. 8/207 useless extension candidates. Maximal degree in co-relation 335. Up to 35 conditions per place. [2022-09-20 21:01:18,484 INFO L137 encePairwiseOnDemand]: 88/95 looper letters, 13 selfloop transitions, 5 changer transitions 0/87 dead transitions. [2022-09-20 21:01:18,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 87 transitions, 245 flow [2022-09-20 21:01:18,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-20 21:01:18,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-20 21:01:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 333 transitions. [2022-09-20 21:01:18,486 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8763157894736842 [2022-09-20 21:01:18,486 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 333 transitions. [2022-09-20 21:01:18,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 333 transitions. [2022-09-20 21:01:18,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:01:18,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 333 transitions. [2022-09-20 21:01:18,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,492 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,492 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 196 flow. Second operand 4 states and 333 transitions. [2022-09-20 21:01:18,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 87 transitions, 245 flow [2022-09-20 21:01:18,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 87 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 21:01:18,498 INFO L231 Difference]: Finished difference. Result has 87 places, 84 transitions, 225 flow [2022-09-20 21:01:18,498 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=87, PETRI_TRANSITIONS=84} [2022-09-20 21:01:18,501 INFO L287 CegarLoopForPetriNet]: 80 programPoint places, 7 predicate places. [2022-09-20 21:01:18,502 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 84 transitions, 225 flow [2022-09-20 21:01:18,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:01:18,503 INFO L208 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:01:18,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-09-20 21:01:18,503 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:01:18,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:01:18,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1643437093, now seen corresponding path program 1 times [2022-09-20 21:01:18,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:01:18,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634104246] [2022-09-20 21:01:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:01:18,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:01:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:01:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-20 21:01:18,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:01:18,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634104246] [2022-09-20 21:01:18,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634104246] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:01:18,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:01:18,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 21:01:18,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870271394] [2022-09-20 21:01:18,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:01:18,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 21:01:18,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:01:18,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 21:01:18,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 21:01:18,635 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 95 [2022-09-20 21:01:18,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 84 transitions, 225 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:01:18,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 95 [2022-09-20 21:01:18,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:01:18,730 INFO L130 PetriNetUnfolder]: 140/500 cut-off events. [2022-09-20 21:01:18,730 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2022-09-20 21:01:18,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 500 events. 140/500 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2719 event pairs, 12 based on Foata normal form. 0/421 useless extension candidates. Maximal degree in co-relation 814. Up to 155 conditions per place. [2022-09-20 21:01:18,735 INFO L137 encePairwiseOnDemand]: 92/95 looper letters, 16 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2022-09-20 21:01:18,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 89 transitions, 272 flow [2022-09-20 21:01:18,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 21:01:18,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 21:01:18,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2022-09-20 21:01:18,737 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.887719298245614 [2022-09-20 21:01:18,737 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 253 transitions. [2022-09-20 21:01:18,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 253 transitions. [2022-09-20 21:01:18,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:01:18,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 253 transitions. [2022-09-20 21:01:18,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,739 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,739 INFO L175 Difference]: Start difference. First operand has 87 places, 84 transitions, 225 flow. Second operand 3 states and 253 transitions. [2022-09-20 21:01:18,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 89 transitions, 272 flow [2022-09-20 21:01:18,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 89 transitions, 267 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-09-20 21:01:18,743 INFO L231 Difference]: Finished difference. Result has 89 places, 85 transitions, 232 flow [2022-09-20 21:01:18,743 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=89, PETRI_TRANSITIONS=85} [2022-09-20 21:01:18,746 INFO L287 CegarLoopForPetriNet]: 80 programPoint places, 9 predicate places. [2022-09-20 21:01:18,746 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 85 transitions, 232 flow [2022-09-20 21:01:18,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:01:18,747 INFO L208 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:01:18,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-09-20 21:01:18,747 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:01:18,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:01:18,748 INFO L85 PathProgramCache]: Analyzing trace with hash 32834629, now seen corresponding path program 1 times [2022-09-20 21:01:18,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:01:18,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523719307] [2022-09-20 21:01:18,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:01:18,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:01:18,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:01:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-09-20 21:01:18,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:01:18,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523719307] [2022-09-20 21:01:18,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523719307] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:01:18,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:01:18,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-09-20 21:01:18,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111218479] [2022-09-20 21:01:18,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:01:18,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-20 21:01:18,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:01:18,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-20 21:01:18,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-20 21:01:18,915 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 95 [2022-09-20 21:01:18,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 85 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 80.75) internal successors, (323), 4 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:18,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:01:18,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 95 [2022-09-20 21:01:18,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:01:19,027 INFO L130 PetriNetUnfolder]: 132/632 cut-off events. [2022-09-20 21:01:19,027 INFO L131 PetriNetUnfolder]: For 154/154 co-relation queries the response was YES. [2022-09-20 21:01:19,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1081 conditions, 632 events. 132/632 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3800 event pairs, 54 based on Foata normal form. 32/614 useless extension candidates. Maximal degree in co-relation 1071. Up to 127 conditions per place. [2022-09-20 21:01:19,033 INFO L137 encePairwiseOnDemand]: 88/95 looper letters, 14 selfloop transitions, 5 changer transitions 0/90 dead transitions. [2022-09-20 21:01:19,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 90 transitions, 284 flow [2022-09-20 21:01:19,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-09-20 21:01:19,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-09-20 21:01:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 334 transitions. [2022-09-20 21:01:19,035 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8789473684210526 [2022-09-20 21:01:19,035 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 334 transitions. [2022-09-20 21:01:19,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 334 transitions. [2022-09-20 21:01:19,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:01:19,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 334 transitions. [2022-09-20 21:01:19,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 83.5) internal successors, (334), 4 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:19,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:19,038 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:19,038 INFO L175 Difference]: Start difference. First operand has 89 places, 85 transitions, 232 flow. Second operand 4 states and 334 transitions. [2022-09-20 21:01:19,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 90 transitions, 284 flow [2022-09-20 21:01:19,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 90 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 21:01:19,044 INFO L231 Difference]: Finished difference. Result has 93 places, 86 transitions, 261 flow [2022-09-20 21:01:19,044 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=261, PETRI_PLACES=93, PETRI_TRANSITIONS=86} [2022-09-20 21:01:19,045 INFO L287 CegarLoopForPetriNet]: 80 programPoint places, 13 predicate places. [2022-09-20 21:01:19,046 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 86 transitions, 261 flow [2022-09-20 21:01:19,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.75) internal successors, (323), 4 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:19,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:01:19,046 INFO L208 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:01:19,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-09-20 21:01:19,046 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:01:19,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:01:19,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1337733893, now seen corresponding path program 1 times [2022-09-20 21:01:19,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:01:19,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294005642] [2022-09-20 21:01:19,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:01:19,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:01:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:01:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 21:01:19,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:01:19,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294005642] [2022-09-20 21:01:19,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294005642] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:01:19,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118405315] [2022-09-20 21:01:19,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:01:19,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:01:19,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:01:19,236 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:01:19,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-09-20 21:01:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:01:19,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2022-09-20 21:01:19,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:01:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 21:01:19,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:01:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 21:01:19,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118405315] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:01:19,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:01:19,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-09-20 21:01:19,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416335670] [2022-09-20 21:01:19,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:01:19,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-20 21:01:19,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:01:19,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-20 21:01:19,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-09-20 21:01:19,585 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 95 [2022-09-20 21:01:19,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 86 transitions, 261 flow. Second operand has 7 states, 7 states have (on average 78.85714285714286) internal successors, (552), 7 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:19,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:01:19,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 95 [2022-09-20 21:01:19,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:01:19,726 INFO L130 PetriNetUnfolder]: 99/715 cut-off events. [2022-09-20 21:01:19,727 INFO L131 PetriNetUnfolder]: For 207/207 co-relation queries the response was YES. [2022-09-20 21:01:19,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1268 conditions, 715 events. 99/715 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 4429 event pairs, 16 based on Foata normal form. 1/674 useless extension candidates. Maximal degree in co-relation 1256. Up to 100 conditions per place. [2022-09-20 21:01:19,733 INFO L137 encePairwiseOnDemand]: 87/95 looper letters, 26 selfloop transitions, 7 changer transitions 4/110 dead transitions. [2022-09-20 21:01:19,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 110 transitions, 390 flow [2022-09-20 21:01:19,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-20 21:01:19,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-20 21:01:19,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 577 transitions. [2022-09-20 21:01:19,735 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8676691729323308 [2022-09-20 21:01:19,735 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 577 transitions. [2022-09-20 21:01:19,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 577 transitions. [2022-09-20 21:01:19,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:01:19,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 577 transitions. [2022-09-20 21:01:19,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.42857142857143) internal successors, (577), 7 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:19,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 95.0) internal successors, (760), 8 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:19,739 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 95.0) internal successors, (760), 8 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:19,739 INFO L175 Difference]: Start difference. First operand has 93 places, 86 transitions, 261 flow. Second operand 7 states and 577 transitions. [2022-09-20 21:01:19,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 110 transitions, 390 flow [2022-09-20 21:01:19,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 110 transitions, 385 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-09-20 21:01:19,743 INFO L231 Difference]: Finished difference. Result has 103 places, 92 transitions, 307 flow [2022-09-20 21:01:19,743 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=307, PETRI_PLACES=103, PETRI_TRANSITIONS=92} [2022-09-20 21:01:19,744 INFO L287 CegarLoopForPetriNet]: 80 programPoint places, 23 predicate places. [2022-09-20 21:01:19,744 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 92 transitions, 307 flow [2022-09-20 21:01:19,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 78.85714285714286) internal successors, (552), 7 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:19,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:01:19,744 INFO L208 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:01:19,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-09-20 21:01:19,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:01:19,961 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:01:19,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:01:19,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1787245407, now seen corresponding path program 2 times [2022-09-20 21:01:19,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:01:19,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271009980] [2022-09-20 21:01:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:01:19,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:01:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:01:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 21:01:20,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:01:20,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271009980] [2022-09-20 21:01:20,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271009980] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:01:20,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001172833] [2022-09-20 21:01:20,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:01:20,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:01:20,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:01:20,098 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:01:20,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-09-20 21:01:20,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:01:20,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:01:20,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2022-09-20 21:01:20,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:01:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 21:01:20,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:01:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-09-20 21:01:20,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001172833] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:01:20,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:01:20,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-09-20 21:01:20,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885469057] [2022-09-20 21:01:20,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:01:20,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-20 21:01:20,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:01:20,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-20 21:01:20,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-09-20 21:01:20,455 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 95 [2022-09-20 21:01:20,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 92 transitions, 307 flow. Second operand has 7 states, 7 states have (on average 78.85714285714286) internal successors, (552), 7 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:20,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:01:20,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 95 [2022-09-20 21:01:20,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:01:20,643 INFO L130 PetriNetUnfolder]: 132/958 cut-off events. [2022-09-20 21:01:20,643 INFO L131 PetriNetUnfolder]: For 437/451 co-relation queries the response was YES. [2022-09-20 21:01:20,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1909 conditions, 958 events. 132/958 cut-off events. For 437/451 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 6811 event pairs, 14 based on Foata normal form. 5/909 useless extension candidates. Maximal degree in co-relation 1892. Up to 160 conditions per place. [2022-09-20 21:01:20,652 INFO L137 encePairwiseOnDemand]: 87/95 looper letters, 32 selfloop transitions, 11 changer transitions 4/120 dead transitions. [2022-09-20 21:01:20,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 120 transitions, 507 flow [2022-09-20 21:01:20,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-20 21:01:20,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-20 21:01:20,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 577 transitions. [2022-09-20 21:01:20,654 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8676691729323308 [2022-09-20 21:01:20,654 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 577 transitions. [2022-09-20 21:01:20,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 577 transitions. [2022-09-20 21:01:20,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:01:20,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 577 transitions. [2022-09-20 21:01:20,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.42857142857143) internal successors, (577), 7 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:20,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 95.0) internal successors, (760), 8 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:20,659 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 95.0) internal successors, (760), 8 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:20,659 INFO L175 Difference]: Start difference. First operand has 103 places, 92 transitions, 307 flow. Second operand 7 states and 577 transitions. [2022-09-20 21:01:20,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 120 transitions, 507 flow [2022-09-20 21:01:20,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 120 transitions, 493 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-09-20 21:01:20,664 INFO L231 Difference]: Finished difference. Result has 110 places, 102 transitions, 412 flow [2022-09-20 21:01:20,664 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=412, PETRI_PLACES=110, PETRI_TRANSITIONS=102} [2022-09-20 21:01:20,664 INFO L287 CegarLoopForPetriNet]: 80 programPoint places, 30 predicate places. [2022-09-20 21:01:20,665 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 102 transitions, 412 flow [2022-09-20 21:01:20,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 78.85714285714286) internal successors, (552), 7 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:20,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:01:20,665 INFO L208 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:01:20,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-09-20 21:01:20,883 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,SelfDestructingSolverStorable8 [2022-09-20 21:01:20,884 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:01:20,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:01:20,884 INFO L85 PathProgramCache]: Analyzing trace with hash -596172903, now seen corresponding path program 3 times [2022-09-20 21:01:20,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:01:20,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51800349] [2022-09-20 21:01:20,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:01:20,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:01:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:01:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:01:20,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:01:20,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51800349] [2022-09-20 21:01:20,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51800349] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:01:20,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411851998] [2022-09-20 21:01:20,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:01:20,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:01:20,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:01:20,981 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:01:21,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-09-20 21:01:21,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-09-20 21:01:21,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:01:21,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2022-09-20 21:01:21,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:01:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:01:21,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:01:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:01:21,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411851998] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:01:21,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:01:21,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-09-20 21:01:21,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125896604] [2022-09-20 21:01:21,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:01:21,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-09-20 21:01:21,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:01:21,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-09-20 21:01:21,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-09-20 21:01:21,287 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 95 [2022-09-20 21:01:21,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 102 transitions, 412 flow. Second operand has 8 states, 8 states have (on average 78.625) internal successors, (629), 8 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:21,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:01:21,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 95 [2022-09-20 21:01:21,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:01:21,464 INFO L130 PetriNetUnfolder]: 132/943 cut-off events. [2022-09-20 21:01:21,464 INFO L131 PetriNetUnfolder]: For 840/879 co-relation queries the response was YES. [2022-09-20 21:01:21,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2082 conditions, 943 events. 132/943 cut-off events. For 840/879 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 6703 event pairs, 7 based on Foata normal form. 37/930 useless extension candidates. Maximal degree in co-relation 2061. Up to 86 conditions per place. [2022-09-20 21:01:21,473 INFO L137 encePairwiseOnDemand]: 87/95 looper letters, 22 selfloop transitions, 25 changer transitions 4/124 dead transitions. [2022-09-20 21:01:21,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 124 transitions, 603 flow [2022-09-20 21:01:21,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-09-20 21:01:21,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-09-20 21:01:21,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 652 transitions. [2022-09-20 21:01:21,475 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8578947368421053 [2022-09-20 21:01:21,476 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 652 transitions. [2022-09-20 21:01:21,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 652 transitions. [2022-09-20 21:01:21,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:01:21,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 652 transitions. [2022-09-20 21:01:21,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 81.5) internal successors, (652), 8 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:21,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 95.0) internal successors, (855), 9 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:21,480 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 95.0) internal successors, (855), 9 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:21,480 INFO L175 Difference]: Start difference. First operand has 110 places, 102 transitions, 412 flow. Second operand 8 states and 652 transitions. [2022-09-20 21:01:21,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 124 transitions, 603 flow [2022-09-20 21:01:21,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 124 transitions, 585 flow, removed 9 selfloop flow, removed 2 redundant places. [2022-09-20 21:01:21,485 INFO L231 Difference]: Finished difference. Result has 116 places, 106 transitions, 499 flow [2022-09-20 21:01:21,485 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=499, PETRI_PLACES=116, PETRI_TRANSITIONS=106} [2022-09-20 21:01:21,486 INFO L287 CegarLoopForPetriNet]: 80 programPoint places, 36 predicate places. [2022-09-20 21:01:21,486 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 106 transitions, 499 flow [2022-09-20 21:01:21,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 78.625) internal successors, (629), 8 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:21,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:01:21,487 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:01:21,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-09-20 21:01:21,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:01:21,708 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:01:21,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:01:21,709 INFO L85 PathProgramCache]: Analyzing trace with hash -982729314, now seen corresponding path program 4 times [2022-09-20 21:01:21,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:01:21,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682458870] [2022-09-20 21:01:21,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:01:21,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:01:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:01:21,735 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-09-20 21:01:21,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:01:21,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682458870] [2022-09-20 21:01:21,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682458870] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:01:21,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:01:21,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 21:01:21,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137291260] [2022-09-20 21:01:21,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:01:21,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 21:01:21,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:01:21,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 21:01:21,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 21:01:21,738 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 95 [2022-09-20 21:01:21,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 106 transitions, 499 flow. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:21,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:01:21,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 95 [2022-09-20 21:01:21,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:01:21,863 INFO L130 PetriNetUnfolder]: 109/742 cut-off events. [2022-09-20 21:01:21,866 INFO L131 PetriNetUnfolder]: For 1022/1100 co-relation queries the response was YES. [2022-09-20 21:01:21,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1804 conditions, 742 events. 109/742 cut-off events. For 1022/1100 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4818 event pairs, 10 based on Foata normal form. 28/727 useless extension candidates. Maximal degree in co-relation 1781. Up to 113 conditions per place. [2022-09-20 21:01:21,875 INFO L137 encePairwiseOnDemand]: 91/95 looper letters, 20 selfloop transitions, 4 changer transitions 0/108 dead transitions. [2022-09-20 21:01:21,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 108 transitions, 552 flow [2022-09-20 21:01:21,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 21:01:21,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 21:01:21,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 254 transitions. [2022-09-20 21:01:21,876 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8912280701754386 [2022-09-20 21:01:21,877 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 254 transitions. [2022-09-20 21:01:21,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 254 transitions. [2022-09-20 21:01:21,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:01:21,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 254 transitions. [2022-09-20 21:01:21,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:21,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:21,879 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:21,879 INFO L175 Difference]: Start difference. First operand has 116 places, 106 transitions, 499 flow. Second operand 3 states and 254 transitions. [2022-09-20 21:01:21,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 108 transitions, 552 flow [2022-09-20 21:01:21,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 108 transitions, 531 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-09-20 21:01:21,884 INFO L231 Difference]: Finished difference. Result has 114 places, 107 transitions, 500 flow [2022-09-20 21:01:21,885 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=500, PETRI_PLACES=114, PETRI_TRANSITIONS=107} [2022-09-20 21:01:21,885 INFO L287 CegarLoopForPetriNet]: 80 programPoint places, 34 predicate places. [2022-09-20 21:01:21,885 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 107 transitions, 500 flow [2022-09-20 21:01:21,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:21,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:01:21,886 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:01:21,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-09-20 21:01:21,886 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:01:21,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:01:21,887 INFO L85 PathProgramCache]: Analyzing trace with hash -403236715, now seen corresponding path program 5 times [2022-09-20 21:01:21,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:01:21,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574152482] [2022-09-20 21:01:21,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:01:21,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:01:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:01:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-09-20 21:01:21,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:01:21,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574152482] [2022-09-20 21:01:21,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574152482] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:01:21,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:01:21,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 21:01:21,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117758568] [2022-09-20 21:01:21,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:01:21,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 21:01:21,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:01:21,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 21:01:21,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 21:01:21,930 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 95 [2022-09-20 21:01:21,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 107 transitions, 500 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:21,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:01:21,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 95 [2022-09-20 21:01:21,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:01:22,056 INFO L130 PetriNetUnfolder]: 224/1049 cut-off events. [2022-09-20 21:01:22,056 INFO L131 PetriNetUnfolder]: For 1724/1742 co-relation queries the response was YES. [2022-09-20 21:01:22,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2796 conditions, 1049 events. 224/1049 cut-off events. For 1724/1742 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 7618 event pairs, 41 based on Foata normal form. 37/1011 useless extension candidates. Maximal degree in co-relation 2775. Up to 227 conditions per place. [2022-09-20 21:01:22,064 INFO L137 encePairwiseOnDemand]: 91/95 looper letters, 0 selfloop transitions, 0 changer transitions 109/109 dead transitions. [2022-09-20 21:01:22,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 109 transitions, 609 flow [2022-09-20 21:01:22,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 21:01:22,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 21:01:22,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 256 transitions. [2022-09-20 21:01:22,065 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8982456140350877 [2022-09-20 21:01:22,065 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 256 transitions. [2022-09-20 21:01:22,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 256 transitions. [2022-09-20 21:01:22,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:01:22,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 256 transitions. [2022-09-20 21:01:22,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:22,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:22,067 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:22,067 INFO L175 Difference]: Start difference. First operand has 114 places, 107 transitions, 500 flow. Second operand 3 states and 256 transitions. [2022-09-20 21:01:22,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 109 transitions, 609 flow [2022-09-20 21:01:22,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 109 transitions, 576 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-09-20 21:01:22,073 INFO L231 Difference]: Finished difference. Result has 107 places, 0 transitions, 0 flow [2022-09-20 21:01:22,073 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=107, PETRI_TRANSITIONS=0} [2022-09-20 21:01:22,073 INFO L287 CegarLoopForPetriNet]: 80 programPoint places, 27 predicate places. [2022-09-20 21:01:22,073 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 0 transitions, 0 flow [2022-09-20 21:01:22,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:01:22,076 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-09-20 21:01:22,076 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-09-20 21:01:22,076 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-09-20 21:01:22,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-09-20 21:01:22,077 INFO L444 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:01:22,079 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-09-20 21:01:22,079 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-09-20 21:01:22,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 09:01:22 BasicIcfg [2022-09-20 21:01:22,084 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-09-20 21:01:22,084 INFO L158 Benchmark]: Toolchain (without parser) took 5566.56ms. Allocated memory was 200.3MB in the beginning and 360.7MB in the end (delta: 160.4MB). Free memory was 166.8MB in the beginning and 237.7MB in the end (delta: -70.9MB). Peak memory consumption was 89.1MB. Max. memory is 8.0GB. [2022-09-20 21:01:22,084 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 200.3MB. Free memory is still 153.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-09-20 21:01:22,084 INFO L158 Benchmark]: CACSL2BoogieTranslator took 233.41ms. Allocated memory was 200.3MB in the beginning and 299.9MB in the end (delta: 99.6MB). Free memory was 166.6MB in the beginning and 267.4MB in the end (delta: -100.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-09-20 21:01:22,085 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.17ms. Allocated memory is still 299.9MB. Free memory was 267.4MB in the beginning and 265.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-09-20 21:01:22,085 INFO L158 Benchmark]: Boogie Preprocessor took 18.31ms. Allocated memory is still 299.9MB. Free memory was 265.7MB in the beginning and 264.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-09-20 21:01:22,085 INFO L158 Benchmark]: RCFGBuilder took 317.08ms. Allocated memory is still 299.9MB. Free memory was 264.6MB in the beginning and 252.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-09-20 21:01:22,085 INFO L158 Benchmark]: TraceAbstraction took 4953.65ms. Allocated memory was 299.9MB in the beginning and 360.7MB in the end (delta: 60.8MB). Free memory was 251.4MB in the beginning and 237.7MB in the end (delta: 13.7MB). Peak memory consumption was 75.4MB. Max. memory is 8.0GB. [2022-09-20 21:01:22,087 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 200.3MB. Free memory is still 153.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 233.41ms. Allocated memory was 200.3MB in the beginning and 299.9MB in the end (delta: 99.6MB). Free memory was 166.6MB in the beginning and 267.4MB in the end (delta: -100.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 39.17ms. Allocated memory is still 299.9MB. Free memory was 267.4MB in the beginning and 265.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.31ms. Allocated memory is still 299.9MB. Free memory was 265.7MB in the beginning and 264.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 317.08ms. Allocated memory is still 299.9MB. Free memory was 264.6MB in the beginning and 252.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 4953.65ms. Allocated memory was 299.9MB in the beginning and 360.7MB in the end (delta: 60.8MB). Free memory was 251.4MB in the beginning and 237.7MB in the end (delta: 13.7MB). Peak memory consumption was 75.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 101]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 113 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: 4.8s, OverallIterations: 12, TraceHistogramMax: 3, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 93 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 93 mSDsluCounter, 162 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 281 mSDsCounter, 18 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 567 IncrementalHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18 mSolverCounterUnsat, 63 mSDtfsCounter, 567 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 537 GetRequests, 485 SyntacticMatches, 20 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=500occurred in iteration=11, InterpolantAutomatonStates: 50, 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: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 1110 NumberOfCodeBlocks, 1110 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 1332 ConstructedInterpolants, 0 QuantifiedInterpolants, 4203 SizeOfPredicates, 6 NumberOfNonLiveVariables, 531 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 18 InterpolantComputations, 9 PerfectInterpolantSequences, 75/171 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-09-20 21:01:22,122 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 Received shutdown request...