/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 21:56:09,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 21:56:09,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 21:56:09,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 21:56:09,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 21:56:09,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 21:56:09,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 21:56:09,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 21:56:09,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 21:56:09,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 21:56:09,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 21:56:09,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 21:56:09,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 21:56:09,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 21:56:09,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 21:56:09,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 21:56:09,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 21:56:09,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 21:56:09,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 21:56:09,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 21:56:09,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 21:56:09,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 21:56:09,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 21:56:09,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 21:56:09,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 21:56:09,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 21:56:09,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 21:56:09,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 21:56:09,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 21:56:09,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 21:56:09,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 21:56:09,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 21:56:09,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 21:56:10,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 21:56:10,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 21:56:10,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 21:56:10,001 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 21:56:10,015 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 21:56:10,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 21:56:10,016 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 21:56:10,016 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 21:56:10,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 21:56:10,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 21:56:10,020 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 21:56:10,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 21:56:10,021 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 21:56:10,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 21:56:10,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 21:56:10,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 21:56:10,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 21:56:10,022 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 21:56:10,022 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 21:56:10,022 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 21:56:10,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 21:56:10,022 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 21:56:10,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 21:56:10,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 21:56:10,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 21:56:10,022 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 21:56:10,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 21:56:10,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:56:10,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 21:56:10,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 21:56:10,023 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 21:56:10,023 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 21:56:10,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 21:56:10,023 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 21:56:10,024 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 21:56:10,024 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 21:56:10,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 21:56:10,321 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 21:56:10,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 21:56:10,323 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 21:56:10,324 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 21:56:10,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2023-01-27 21:56:11,316 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 21:56:11,548 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 21:56:11,548 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c [2023-01-27 21:56:11,554 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0267019d7/4d63a11b0a5644bf99f9b3ba6d51bbc5/FLAG55681bfbe [2023-01-27 21:56:11,569 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0267019d7/4d63a11b0a5644bf99f9b3ba6d51bbc5 [2023-01-27 21:56:11,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 21:56:11,571 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 21:56:11,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 21:56:11,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 21:56:11,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 21:56:11,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:56:11" (1/1) ... [2023-01-27 21:56:11,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37dde49e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:56:11, skipping insertion in model container [2023-01-27 21:56:11,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:56:11" (1/1) ... [2023-01-27 21:56:11,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 21:56:11,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 21:56:11,730 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2023-01-27 21:56:11,736 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:56:11,745 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 21:56:11,761 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2023-01-27 21:56:11,764 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:56:11,769 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:56:11,770 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:56:11,774 INFO L208 MainTranslator]: Completed translation [2023-01-27 21:56:11,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:56:11 WrapperNode [2023-01-27 21:56:11,774 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 21:56:11,775 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 21:56:11,775 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 21:56:11,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 21:56:11,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:56:11" (1/1) ... [2023-01-27 21:56:11,786 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:56:11" (1/1) ... [2023-01-27 21:56:11,804 INFO L138 Inliner]: procedures = 27, calls = 76, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 311 [2023-01-27 21:56:11,805 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 21:56:11,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 21:56:11,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 21:56:11,805 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 21:56:11,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:56:11" (1/1) ... [2023-01-27 21:56:11,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:56:11" (1/1) ... [2023-01-27 21:56:11,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:56:11" (1/1) ... [2023-01-27 21:56:11,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:56:11" (1/1) ... [2023-01-27 21:56:11,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:56:11" (1/1) ... [2023-01-27 21:56:11,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:56:11" (1/1) ... [2023-01-27 21:56:11,824 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:56:11" (1/1) ... [2023-01-27 21:56:11,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:56:11" (1/1) ... [2023-01-27 21:56:11,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 21:56:11,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 21:56:11,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 21:56:11,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 21:56:11,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:56:11" (1/1) ... [2023-01-27 21:56:11,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:56:11,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:56:11,881 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 21:56:11,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 21:56:11,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 21:56:11,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 21:56:11,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 21:56:11,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 21:56:11,906 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 21:56:11,906 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 21:56:11,906 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 21:56:11,906 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 21:56:11,907 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-27 21:56:11,907 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-27 21:56:11,907 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-01-27 21:56:11,907 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-01-27 21:56:11,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 21:56:11,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 21:56:11,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 21:56:11,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 21:56:11,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 21:56:11,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 21:56:11,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 21:56:11,908 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 21:56:11,982 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 21:56:11,983 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 21:56:12,265 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 21:56:12,467 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 21:56:12,467 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-01-27 21:56:12,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:56:12 BoogieIcfgContainer [2023-01-27 21:56:12,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 21:56:12,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 21:56:12,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 21:56:12,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 21:56:12,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 09:56:11" (1/3) ... [2023-01-27 21:56:12,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48cb8acb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:56:12, skipping insertion in model container [2023-01-27 21:56:12,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:56:11" (2/3) ... [2023-01-27 21:56:12,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48cb8acb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:56:12, skipping insertion in model container [2023-01-27 21:56:12,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:56:12" (3/3) ... [2023-01-27 21:56:12,478 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult2.wvr.c [2023-01-27 21:56:12,491 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 21:56:12,491 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 21:56:12,491 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 21:56:12,571 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 21:56:12,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 220 transitions, 472 flow [2023-01-27 21:56:12,682 INFO L130 PetriNetUnfolder]: 18/216 cut-off events. [2023-01-27 21:56:12,682 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-27 21:56:12,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 216 events. 18/216 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 114 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 179. Up to 2 conditions per place. [2023-01-27 21:56:12,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 220 transitions, 472 flow [2023-01-27 21:56:12,697 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 204 transitions, 432 flow [2023-01-27 21:56:12,699 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 21:56:12,713 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 204 transitions, 432 flow [2023-01-27 21:56:12,715 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 204 transitions, 432 flow [2023-01-27 21:56:12,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 204 transitions, 432 flow [2023-01-27 21:56:12,755 INFO L130 PetriNetUnfolder]: 18/204 cut-off events. [2023-01-27 21:56:12,756 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-27 21:56:12,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 204 events. 18/204 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 115 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 179. Up to 2 conditions per place. [2023-01-27 21:56:12,759 INFO L119 LiptonReduction]: Number of co-enabled transitions 1824 [2023-01-27 21:56:18,888 INFO L134 LiptonReduction]: Checked pairs total: 2906 [2023-01-27 21:56:18,889 INFO L136 LiptonReduction]: Total number of compositions: 200 [2023-01-27 21:56:18,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 21:56:18,914 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;@1fa69fc6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 21:56:18,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 21:56:18,924 INFO L130 PetriNetUnfolder]: 6/34 cut-off events. [2023-01-27 21:56:18,924 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-27 21:56:18,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:56:18,925 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] [2023-01-27 21:56:18,926 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:56:18,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:56:18,929 INFO L85 PathProgramCache]: Analyzing trace with hash -126291369, now seen corresponding path program 1 times [2023-01-27 21:56:18,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:56:18,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447654612] [2023-01-27 21:56:18,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:56:18,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:56:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:56:19,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:56:19,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:56:19,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447654612] [2023-01-27 21:56:19,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447654612] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:56:19,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:56:19,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 21:56:19,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666878511] [2023-01-27 21:56:19,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:56:19,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 21:56:19,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:56:19,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 21:56:19,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 21:56:19,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 420 [2023-01-27 21:56:19,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:19,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:56:19,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 420 [2023-01-27 21:56:19,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:56:19,552 INFO L130 PetriNetUnfolder]: 1615/2213 cut-off events. [2023-01-27 21:56:19,552 INFO L131 PetriNetUnfolder]: For 145/145 co-relation queries the response was YES. [2023-01-27 21:56:19,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4407 conditions, 2213 events. 1615/2213 cut-off events. For 145/145 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8955 event pairs, 271 based on Foata normal form. 1/1331 useless extension candidates. Maximal degree in co-relation 3408. Up to 1413 conditions per place. [2023-01-27 21:56:19,565 INFO L137 encePairwiseOnDemand]: 416/420 looper letters, 43 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-01-27 21:56:19,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 239 flow [2023-01-27 21:56:19,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 21:56:19,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 21:56:19,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 627 transitions. [2023-01-27 21:56:19,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976190476190476 [2023-01-27 21:56:19,581 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 627 transitions. [2023-01-27 21:56:19,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 627 transitions. [2023-01-27 21:56:19,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:56:19,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 627 transitions. [2023-01-27 21:56:19,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:19,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:19,596 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:19,597 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 94 flow. Second operand 3 states and 627 transitions. [2023-01-27 21:56:19,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 239 flow [2023-01-27 21:56:19,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 53 transitions, 213 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-01-27 21:56:19,603 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 97 flow [2023-01-27 21:56:19,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-01-27 21:56:19,609 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2023-01-27 21:56:19,609 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 97 flow [2023-01-27 21:56:19,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:19,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:56:19,610 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] [2023-01-27 21:56:19,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 21:56:19,611 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:56:19,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:56:19,616 INFO L85 PathProgramCache]: Analyzing trace with hash -166356890, now seen corresponding path program 1 times [2023-01-27 21:56:19,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:56:19,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939685233] [2023-01-27 21:56:19,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:56:19,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:56:19,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:56:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:56:19,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:56:19,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939685233] [2023-01-27 21:56:19,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939685233] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:56:19,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:56:19,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 21:56:19,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830340229] [2023-01-27 21:56:19,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:56:19,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 21:56:19,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:56:19,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 21:56:19,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 21:56:19,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 420 [2023-01-27 21:56:19,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:19,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:56:19,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 420 [2023-01-27 21:56:19,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:56:20,030 INFO L130 PetriNetUnfolder]: 2187/2885 cut-off events. [2023-01-27 21:56:20,031 INFO L131 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2023-01-27 21:56:20,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6425 conditions, 2885 events. 2187/2885 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 11793 event pairs, 596 based on Foata normal form. 76/2337 useless extension candidates. Maximal degree in co-relation 2214. Up to 1820 conditions per place. [2023-01-27 21:56:20,042 INFO L137 encePairwiseOnDemand]: 417/420 looper letters, 53 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-01-27 21:56:20,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 59 transitions, 264 flow [2023-01-27 21:56:20,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 21:56:20,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 21:56:20,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2023-01-27 21:56:20,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2023-01-27 21:56:20,043 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2023-01-27 21:56:20,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2023-01-27 21:56:20,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:56:20,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2023-01-27 21:56:20,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:20,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:20,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:20,047 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 97 flow. Second operand 3 states and 620 transitions. [2023-01-27 21:56:20,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 59 transitions, 264 flow [2023-01-27 21:56:20,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 59 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 21:56:20,050 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 108 flow [2023-01-27 21:56:20,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-01-27 21:56:20,051 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-01-27 21:56:20,051 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 108 flow [2023-01-27 21:56:20,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:20,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:56:20,051 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] [2023-01-27 21:56:20,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 21:56:20,051 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:56:20,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:56:20,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1584924050, now seen corresponding path program 1 times [2023-01-27 21:56:20,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:56:20,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926572097] [2023-01-27 21:56:20,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:56:20,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:56:20,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:56:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:56:20,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:56:20,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926572097] [2023-01-27 21:56:20,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926572097] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:56:20,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:56:20,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 21:56:20,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137073988] [2023-01-27 21:56:20,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:56:20,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 21:56:20,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:56:20,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 21:56:20,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 21:56:20,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 420 [2023-01-27 21:56:20,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:20,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:56:20,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 420 [2023-01-27 21:56:20,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:56:20,368 INFO L130 PetriNetUnfolder]: 2417/3353 cut-off events. [2023-01-27 21:56:20,369 INFO L131 PetriNetUnfolder]: For 1265/1265 co-relation queries the response was YES. [2023-01-27 21:56:20,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7906 conditions, 3353 events. 2417/3353 cut-off events. For 1265/1265 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15584 event pairs, 747 based on Foata normal form. 100/3107 useless extension candidates. Maximal degree in co-relation 3828. Up to 2227 conditions per place. [2023-01-27 21:56:20,425 INFO L137 encePairwiseOnDemand]: 417/420 looper letters, 57 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-01-27 21:56:20,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 63 transitions, 298 flow [2023-01-27 21:56:20,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 21:56:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 21:56:20,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2023-01-27 21:56:20,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4936507936507937 [2023-01-27 21:56:20,427 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2023-01-27 21:56:20,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2023-01-27 21:56:20,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:56:20,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2023-01-27 21:56:20,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:20,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:20,431 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 420.0) internal successors, (1680), 4 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:20,431 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 108 flow. Second operand 3 states and 622 transitions. [2023-01-27 21:56:20,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 63 transitions, 298 flow [2023-01-27 21:56:20,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 63 transitions, 295 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 21:56:20,433 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 120 flow [2023-01-27 21:56:20,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-01-27 21:56:20,434 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-01-27 21:56:20,437 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 120 flow [2023-01-27 21:56:20,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:20,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:56:20,437 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] [2023-01-27 21:56:20,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 21:56:20,438 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:56:20,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:56:20,438 INFO L85 PathProgramCache]: Analyzing trace with hash 830249853, now seen corresponding path program 1 times [2023-01-27 21:56:20,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:56:20,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883301166] [2023-01-27 21:56:20,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:56:20,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:56:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:56:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:56:20,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:56:20,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883301166] [2023-01-27 21:56:20,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883301166] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:56:20,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:56:20,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 21:56:20,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610719975] [2023-01-27 21:56:20,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:56:20,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 21:56:20,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:56:20,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 21:56:20,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 21:56:20,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 420 [2023-01-27 21:56:20,543 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:20,543 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:56:20,543 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 420 [2023-01-27 21:56:20,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:56:20,788 INFO L130 PetriNetUnfolder]: 2112/3127 cut-off events. [2023-01-27 21:56:20,788 INFO L131 PetriNetUnfolder]: For 1778/1778 co-relation queries the response was YES. [2023-01-27 21:56:20,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7659 conditions, 3127 events. 2112/3127 cut-off events. For 1778/1778 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 16392 event pairs, 1532 based on Foata normal form. 100/3148 useless extension candidates. Maximal degree in co-relation 3812. Up to 2237 conditions per place. [2023-01-27 21:56:20,800 INFO L137 encePairwiseOnDemand]: 416/420 looper letters, 56 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2023-01-27 21:56:20,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 65 transitions, 313 flow [2023-01-27 21:56:20,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 21:56:20,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 21:56:20,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 734 transitions. [2023-01-27 21:56:20,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4369047619047619 [2023-01-27 21:56:20,802 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 734 transitions. [2023-01-27 21:56:20,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 734 transitions. [2023-01-27 21:56:20,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:56:20,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 734 transitions. [2023-01-27 21:56:20,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.5) internal successors, (734), 4 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:20,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:20,806 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 420.0) internal successors, (2100), 5 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:20,806 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 120 flow. Second operand 4 states and 734 transitions. [2023-01-27 21:56:20,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 65 transitions, 313 flow [2023-01-27 21:56:20,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 65 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 21:56:20,808 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 138 flow [2023-01-27 21:56:20,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-01-27 21:56:20,809 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-01-27 21:56:20,809 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 138 flow [2023-01-27 21:56:20,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:20,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:56:20,809 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] [2023-01-27 21:56:20,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 21:56:20,809 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:56:20,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:56:20,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1828692873, now seen corresponding path program 1 times [2023-01-27 21:56:20,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:56:20,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354837194] [2023-01-27 21:56:20,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:56:20,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:56:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:56:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:56:20,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:56:20,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354837194] [2023-01-27 21:56:20,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354837194] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:56:20,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:56:20,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 21:56:20,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78848818] [2023-01-27 21:56:20,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:56:20,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 21:56:20,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:56:20,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 21:56:20,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 21:56:20,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 420 [2023-01-27 21:56:20,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:20,893 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:56:20,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 420 [2023-01-27 21:56:20,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:56:21,232 INFO L130 PetriNetUnfolder]: 2699/4094 cut-off events. [2023-01-27 21:56:21,233 INFO L131 PetriNetUnfolder]: For 2330/2330 co-relation queries the response was YES. [2023-01-27 21:56:21,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9854 conditions, 4094 events. 2699/4094 cut-off events. For 2330/2330 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 23414 event pairs, 2028 based on Foata normal form. 104/4122 useless extension candidates. Maximal degree in co-relation 5833. Up to 2990 conditions per place. [2023-01-27 21:56:21,247 INFO L137 encePairwiseOnDemand]: 415/420 looper letters, 60 selfloop transitions, 4 changer transitions 20/90 dead transitions. [2023-01-27 21:56:21,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 90 transitions, 450 flow [2023-01-27 21:56:21,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:56:21,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:56:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 928 transitions. [2023-01-27 21:56:21,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4419047619047619 [2023-01-27 21:56:21,250 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 928 transitions. [2023-01-27 21:56:21,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 928 transitions. [2023-01-27 21:56:21,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:56:21,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 928 transitions. [2023-01-27 21:56:21,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.6) internal successors, (928), 5 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:21,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 420.0) internal successors, (2520), 6 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:21,255 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 420.0) internal successors, (2520), 6 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:21,255 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 138 flow. Second operand 5 states and 928 transitions. [2023-01-27 21:56:21,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 90 transitions, 450 flow [2023-01-27 21:56:21,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 90 transitions, 442 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-27 21:56:21,257 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 166 flow [2023-01-27 21:56:21,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2023-01-27 21:56:21,258 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2023-01-27 21:56:21,258 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 166 flow [2023-01-27 21:56:21,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.25) internal successors, (705), 4 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:21,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:56:21,258 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] [2023-01-27 21:56:21,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 21:56:21,259 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:56:21,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:56:21,259 INFO L85 PathProgramCache]: Analyzing trace with hash -2023714045, now seen corresponding path program 1 times [2023-01-27 21:56:21,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:56:21,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833366820] [2023-01-27 21:56:21,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:56:21,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:56:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:56:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:56:21,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:56:21,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833366820] [2023-01-27 21:56:21,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833366820] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:56:21,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032873440] [2023-01-27 21:56:21,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:56:21,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:56:21,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:56:21,576 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:56:21,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 21:56:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:56:21,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 21:56:21,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:56:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:56:21,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:56:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:56:22,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032873440] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 21:56:22,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 21:56:22,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 5] total 14 [2023-01-27 21:56:22,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712064221] [2023-01-27 21:56:22,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:56:22,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 21:56:22,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:56:22,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 21:56:22,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-01-27 21:56:22,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 420 [2023-01-27 21:56:22,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 166 flow. Second operand has 7 states, 7 states have (on average 176.42857142857142) internal successors, (1235), 7 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:22,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:56:22,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 420 [2023-01-27 21:56:22,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:56:23,479 INFO L130 PetriNetUnfolder]: 11849/16855 cut-off events. [2023-01-27 21:56:23,480 INFO L131 PetriNetUnfolder]: For 7043/7043 co-relation queries the response was YES. [2023-01-27 21:56:23,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39886 conditions, 16855 events. 11849/16855 cut-off events. For 7043/7043 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 92074 event pairs, 1914 based on Foata normal form. 360/17213 useless extension candidates. Maximal degree in co-relation 30932. Up to 3696 conditions per place. [2023-01-27 21:56:23,543 INFO L137 encePairwiseOnDemand]: 411/420 looper letters, 200 selfloop transitions, 33 changer transitions 9/242 dead transitions. [2023-01-27 21:56:23,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 242 transitions, 1214 flow [2023-01-27 21:56:23,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 21:56:23,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 21:56:23,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2465 transitions. [2023-01-27 21:56:23,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45146520146520147 [2023-01-27 21:56:23,553 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2465 transitions. [2023-01-27 21:56:23,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2465 transitions. [2023-01-27 21:56:23,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:56:23,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2465 transitions. [2023-01-27 21:56:23,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 189.6153846153846) internal successors, (2465), 13 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:23,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 420.0) internal successors, (5880), 14 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:23,564 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 420.0) internal successors, (5880), 14 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:23,564 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 166 flow. Second operand 13 states and 2465 transitions. [2023-01-27 21:56:23,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 242 transitions, 1214 flow [2023-01-27 21:56:23,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 242 transitions, 1210 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 21:56:23,570 INFO L231 Difference]: Finished difference. Result has 73 places, 74 transitions, 445 flow [2023-01-27 21:56:23,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=445, PETRI_PLACES=73, PETRI_TRANSITIONS=74} [2023-01-27 21:56:23,572 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2023-01-27 21:56:23,573 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 74 transitions, 445 flow [2023-01-27 21:56:23,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 176.42857142857142) internal successors, (1235), 7 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:23,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:56:23,573 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] [2023-01-27 21:56:23,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 21:56:23,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-01-27 21:56:23,778 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:56:23,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:56:23,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1097017845, now seen corresponding path program 2 times [2023-01-27 21:56:23,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:56:23,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963793781] [2023-01-27 21:56:23,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:56:23,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:56:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:56:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:56:24,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:56:24,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963793781] [2023-01-27 21:56:24,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963793781] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:56:24,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:56:24,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:56:24,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849494101] [2023-01-27 21:56:24,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:56:24,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 21:56:24,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:56:24,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 21:56:24,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-01-27 21:56:24,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 420 [2023-01-27 21:56:24,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 74 transitions, 445 flow. Second operand has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:24,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:56:24,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 420 [2023-01-27 21:56:24,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:56:25,438 INFO L130 PetriNetUnfolder]: 12313/17699 cut-off events. [2023-01-27 21:56:25,438 INFO L131 PetriNetUnfolder]: For 31798/31798 co-relation queries the response was YES. [2023-01-27 21:56:25,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57552 conditions, 17699 events. 12313/17699 cut-off events. For 31798/31798 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 98739 event pairs, 3658 based on Foata normal form. 52/17749 useless extension candidates. Maximal degree in co-relation 48026. Up to 13071 conditions per place. [2023-01-27 21:56:25,513 INFO L137 encePairwiseOnDemand]: 414/420 looper letters, 102 selfloop transitions, 13 changer transitions 30/145 dead transitions. [2023-01-27 21:56:25,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 145 transitions, 1003 flow [2023-01-27 21:56:25,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 21:56:25,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 21:56:25,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1173 transitions. [2023-01-27 21:56:25,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4654761904761905 [2023-01-27 21:56:25,517 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1173 transitions. [2023-01-27 21:56:25,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1173 transitions. [2023-01-27 21:56:25,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:56:25,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1173 transitions. [2023-01-27 21:56:25,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 195.5) internal successors, (1173), 6 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:25,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 420.0) internal successors, (2940), 7 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:25,522 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 420.0) internal successors, (2940), 7 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:25,522 INFO L175 Difference]: Start difference. First operand has 73 places, 74 transitions, 445 flow. Second operand 6 states and 1173 transitions. [2023-01-27 21:56:25,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 145 transitions, 1003 flow [2023-01-27 21:56:25,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 145 transitions, 982 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-01-27 21:56:25,658 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 519 flow [2023-01-27 21:56:25,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=519, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2023-01-27 21:56:25,658 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2023-01-27 21:56:25,658 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 519 flow [2023-01-27 21:56:25,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:25,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:56:25,659 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] [2023-01-27 21:56:25,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 21:56:25,659 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:56:25,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:56:25,660 INFO L85 PathProgramCache]: Analyzing trace with hash -378640933, now seen corresponding path program 3 times [2023-01-27 21:56:25,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:56:25,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924563174] [2023-01-27 21:56:25,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:56:25,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:56:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:56:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:56:25,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:56:25,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924563174] [2023-01-27 21:56:25,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924563174] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:56:25,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:56:25,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:56:25,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976203461] [2023-01-27 21:56:25,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:56:25,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 21:56:25,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:56:25,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 21:56:25,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-01-27 21:56:25,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 420 [2023-01-27 21:56:25,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 519 flow. Second operand has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:25,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:56:25,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 420 [2023-01-27 21:56:25,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:56:27,975 INFO L130 PetriNetUnfolder]: 17203/24645 cut-off events. [2023-01-27 21:56:27,975 INFO L131 PetriNetUnfolder]: For 57201/57201 co-relation queries the response was YES. [2023-01-27 21:56:28,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84027 conditions, 24645 events. 17203/24645 cut-off events. For 57201/57201 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 142765 event pairs, 5212 based on Foata normal form. 208/24851 useless extension candidates. Maximal degree in co-relation 65471. Up to 13027 conditions per place. [2023-01-27 21:56:28,091 INFO L137 encePairwiseOnDemand]: 412/420 looper letters, 165 selfloop transitions, 30 changer transitions 11/206 dead transitions. [2023-01-27 21:56:28,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 206 transitions, 1605 flow [2023-01-27 21:56:28,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 21:56:28,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 21:56:28,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1561 transitions. [2023-01-27 21:56:28,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46458333333333335 [2023-01-27 21:56:28,095 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1561 transitions. [2023-01-27 21:56:28,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1561 transitions. [2023-01-27 21:56:28,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:56:28,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1561 transitions. [2023-01-27 21:56:28,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 195.125) internal successors, (1561), 8 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:28,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:28,101 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:28,101 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 519 flow. Second operand 8 states and 1561 transitions. [2023-01-27 21:56:28,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 206 transitions, 1605 flow [2023-01-27 21:56:28,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 206 transitions, 1513 flow, removed 24 selfloop flow, removed 2 redundant places. [2023-01-27 21:56:28,209 INFO L231 Difference]: Finished difference. Result has 87 places, 97 transitions, 745 flow [2023-01-27 21:56:28,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=745, PETRI_PLACES=87, PETRI_TRANSITIONS=97} [2023-01-27 21:56:28,211 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2023-01-27 21:56:28,211 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 97 transitions, 745 flow [2023-01-27 21:56:28,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:28,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:56:28,212 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] [2023-01-27 21:56:28,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 21:56:28,212 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:56:28,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:56:28,213 INFO L85 PathProgramCache]: Analyzing trace with hash 105860259, now seen corresponding path program 4 times [2023-01-27 21:56:28,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:56:28,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753451513] [2023-01-27 21:56:28,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:56:28,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:56:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:56:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:56:28,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:56:28,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753451513] [2023-01-27 21:56:28,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753451513] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:56:28,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:56:28,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:56:28,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572585687] [2023-01-27 21:56:28,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:56:28,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 21:56:28,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:56:28,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 21:56:28,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-27 21:56:28,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 420 [2023-01-27 21:56:28,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 97 transitions, 745 flow. Second operand has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:28,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:56:28,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 420 [2023-01-27 21:56:28,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:56:31,604 INFO L130 PetriNetUnfolder]: 22917/33653 cut-off events. [2023-01-27 21:56:31,605 INFO L131 PetriNetUnfolder]: For 89298/89298 co-relation queries the response was YES. [2023-01-27 21:56:31,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122905 conditions, 33653 events. 22917/33653 cut-off events. For 89298/89298 co-relation queries the response was YES. Maximal size of possible extension queue 1142. Compared 217178 event pairs, 6526 based on Foata normal form. 368/34019 useless extension candidates. Maximal degree in co-relation 102762. Up to 16763 conditions per place. [2023-01-27 21:56:31,786 INFO L137 encePairwiseOnDemand]: 414/420 looper letters, 208 selfloop transitions, 37 changer transitions 11/256 dead transitions. [2023-01-27 21:56:31,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 256 transitions, 2098 flow [2023-01-27 21:56:31,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 21:56:31,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 21:56:31,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1585 transitions. [2023-01-27 21:56:31,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47172619047619047 [2023-01-27 21:56:31,790 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1585 transitions. [2023-01-27 21:56:31,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1585 transitions. [2023-01-27 21:56:31,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:56:31,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1585 transitions. [2023-01-27 21:56:31,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.125) internal successors, (1585), 8 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:31,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:31,797 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:31,797 INFO L175 Difference]: Start difference. First operand has 87 places, 97 transitions, 745 flow. Second operand 8 states and 1585 transitions. [2023-01-27 21:56:31,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 256 transitions, 2098 flow [2023-01-27 21:56:32,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 256 transitions, 2029 flow, removed 31 selfloop flow, removed 1 redundant places. [2023-01-27 21:56:32,288 INFO L231 Difference]: Finished difference. Result has 98 places, 115 transitions, 1055 flow [2023-01-27 21:56:32,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1055, PETRI_PLACES=98, PETRI_TRANSITIONS=115} [2023-01-27 21:56:32,289 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2023-01-27 21:56:32,289 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 115 transitions, 1055 flow [2023-01-27 21:56:32,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:32,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:56:32,289 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] [2023-01-27 21:56:32,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 21:56:32,290 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:56:32,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:56:32,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2028839541, now seen corresponding path program 5 times [2023-01-27 21:56:32,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:56:32,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893219963] [2023-01-27 21:56:32,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:56:32,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:56:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:56:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:56:32,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:56:32,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893219963] [2023-01-27 21:56:32,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893219963] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:56:32,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:56:32,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:56:32,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868295035] [2023-01-27 21:56:32,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:56:32,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 21:56:32,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:56:32,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 21:56:32,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-01-27 21:56:32,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 420 [2023-01-27 21:56:32,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 115 transitions, 1055 flow. Second operand has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:32,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:56:32,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 420 [2023-01-27 21:56:32,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:56:35,406 INFO L130 PetriNetUnfolder]: 20461/29645 cut-off events. [2023-01-27 21:56:35,407 INFO L131 PetriNetUnfolder]: For 109577/109577 co-relation queries the response was YES. [2023-01-27 21:56:35,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116455 conditions, 29645 events. 20461/29645 cut-off events. For 109577/109577 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 181315 event pairs, 7882 based on Foata normal form. 148/29791 useless extension candidates. Maximal degree in co-relation 100526. Up to 23679 conditions per place. [2023-01-27 21:56:35,541 INFO L137 encePairwiseOnDemand]: 413/420 looper letters, 136 selfloop transitions, 32 changer transitions 28/196 dead transitions. [2023-01-27 21:56:35,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 196 transitions, 1687 flow [2023-01-27 21:56:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 21:56:35,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 21:56:35,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1558 transitions. [2023-01-27 21:56:35,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636904761904762 [2023-01-27 21:56:35,544 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1558 transitions. [2023-01-27 21:56:35,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1558 transitions. [2023-01-27 21:56:35,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:56:35,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1558 transitions. [2023-01-27 21:56:35,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 194.75) internal successors, (1558), 8 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:35,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:35,550 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:35,550 INFO L175 Difference]: Start difference. First operand has 98 places, 115 transitions, 1055 flow. Second operand 8 states and 1558 transitions. [2023-01-27 21:56:35,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 196 transitions, 1687 flow [2023-01-27 21:56:36,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 196 transitions, 1653 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-01-27 21:56:36,308 INFO L231 Difference]: Finished difference. Result has 106 places, 110 transitions, 1033 flow [2023-01-27 21:56:36,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1033, PETRI_PLACES=106, PETRI_TRANSITIONS=110} [2023-01-27 21:56:36,308 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2023-01-27 21:56:36,308 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 110 transitions, 1033 flow [2023-01-27 21:56:36,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:36,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:56:36,309 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] [2023-01-27 21:56:36,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-27 21:56:36,309 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:56:36,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:56:36,309 INFO L85 PathProgramCache]: Analyzing trace with hash -763011869, now seen corresponding path program 6 times [2023-01-27 21:56:36,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:56:36,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085873440] [2023-01-27 21:56:36,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:56:36,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:56:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:56:36,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:56:36,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:56:36,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085873440] [2023-01-27 21:56:36,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085873440] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:56:36,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011011348] [2023-01-27 21:56:36,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:56:36,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:56:36,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:56:36,731 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:56:36,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 21:56:36,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 21:56:36,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:56:36,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 21:56:36,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:56:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:56:37,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 21:56:37,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011011348] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:56:37,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 21:56:37,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2023-01-27 21:56:37,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376083969] [2023-01-27 21:56:37,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:56:37,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 21:56:37,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:56:37,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 21:56:37,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-01-27 21:56:37,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 420 [2023-01-27 21:56:37,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 110 transitions, 1033 flow. Second operand has 6 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:37,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:56:37,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 420 [2023-01-27 21:56:37,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:56:41,141 INFO L130 PetriNetUnfolder]: 28379/41777 cut-off events. [2023-01-27 21:56:41,142 INFO L131 PetriNetUnfolder]: For 145249/145249 co-relation queries the response was YES. [2023-01-27 21:56:41,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162728 conditions, 41777 events. 28379/41777 cut-off events. For 145249/145249 co-relation queries the response was YES. Maximal size of possible extension queue 1499. Compared 278659 event pairs, 10660 based on Foata normal form. 176/41951 useless extension candidates. Maximal degree in co-relation 140570. Up to 25651 conditions per place. [2023-01-27 21:56:41,416 INFO L137 encePairwiseOnDemand]: 411/420 looper letters, 228 selfloop transitions, 99 changer transitions 19/346 dead transitions. [2023-01-27 21:56:41,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 346 transitions, 3641 flow [2023-01-27 21:56:41,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 21:56:41,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 21:56:41,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2275 transitions. [2023-01-27 21:56:41,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4513888888888889 [2023-01-27 21:56:41,420 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2275 transitions. [2023-01-27 21:56:41,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2275 transitions. [2023-01-27 21:56:41,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:56:41,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2275 transitions. [2023-01-27 21:56:41,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 189.58333333333334) internal successors, (2275), 12 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:41,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 420.0) internal successors, (5460), 13 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:41,428 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 420.0) internal successors, (5460), 13 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:41,429 INFO L175 Difference]: Start difference. First operand has 106 places, 110 transitions, 1033 flow. Second operand 12 states and 2275 transitions. [2023-01-27 21:56:41,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 346 transitions, 3641 flow [2023-01-27 21:56:42,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 346 transitions, 3472 flow, removed 17 selfloop flow, removed 5 redundant places. [2023-01-27 21:56:42,381 INFO L231 Difference]: Finished difference. Result has 114 places, 182 transitions, 2131 flow [2023-01-27 21:56:42,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2131, PETRI_PLACES=114, PETRI_TRANSITIONS=182} [2023-01-27 21:56:42,381 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2023-01-27 21:56:42,382 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 182 transitions, 2131 flow [2023-01-27 21:56:42,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:42,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:56:42,382 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] [2023-01-27 21:56:42,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-27 21:56:42,586 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,SelfDestructingSolverStorable10 [2023-01-27 21:56:42,588 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:56:42,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:56:42,588 INFO L85 PathProgramCache]: Analyzing trace with hash -269105815, now seen corresponding path program 7 times [2023-01-27 21:56:42,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:56:42,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711417965] [2023-01-27 21:56:42,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:56:42,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:56:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:56:42,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:56:42,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:56:42,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711417965] [2023-01-27 21:56:42,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711417965] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:56:42,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559450001] [2023-01-27 21:56:42,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:56:42,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:56:42,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:56:42,787 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:56:42,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 21:56:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:56:42,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 21:56:42,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:56:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:56:43,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:56:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:56:43,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559450001] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 21:56:43,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 21:56:43,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 12 [2023-01-27 21:56:43,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160079719] [2023-01-27 21:56:43,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:56:43,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 21:56:43,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:56:43,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 21:56:43,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-01-27 21:56:43,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 420 [2023-01-27 21:56:43,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 182 transitions, 2131 flow. Second operand has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:43,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:56:43,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 420 [2023-01-27 21:56:43,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:56:47,743 INFO L130 PetriNetUnfolder]: 30215/44493 cut-off events. [2023-01-27 21:56:47,743 INFO L131 PetriNetUnfolder]: For 199034/199034 co-relation queries the response was YES. [2023-01-27 21:56:47,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188172 conditions, 44493 events. 30215/44493 cut-off events. For 199034/199034 co-relation queries the response was YES. Maximal size of possible extension queue 1687. Compared 302567 event pairs, 6554 based on Foata normal form. 2056/46547 useless extension candidates. Maximal degree in co-relation 170418. Up to 14235 conditions per place. [2023-01-27 21:56:48,085 INFO L137 encePairwiseOnDemand]: 412/420 looper letters, 205 selfloop transitions, 114 changer transitions 0/319 dead transitions. [2023-01-27 21:56:48,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 319 transitions, 3626 flow [2023-01-27 21:56:48,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:56:48,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:56:48,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1378 transitions. [2023-01-27 21:56:48,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46870748299319726 [2023-01-27 21:56:48,088 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1378 transitions. [2023-01-27 21:56:48,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1378 transitions. [2023-01-27 21:56:48,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:56:48,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1378 transitions. [2023-01-27 21:56:48,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 196.85714285714286) internal successors, (1378), 7 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:48,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 420.0) internal successors, (3360), 8 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:48,094 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 420.0) internal successors, (3360), 8 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:48,094 INFO L175 Difference]: Start difference. First operand has 114 places, 182 transitions, 2131 flow. Second operand 7 states and 1378 transitions. [2023-01-27 21:56:48,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 319 transitions, 3626 flow [2023-01-27 21:56:49,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 319 transitions, 3610 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-01-27 21:56:49,818 INFO L231 Difference]: Finished difference. Result has 121 places, 212 transitions, 2808 flow [2023-01-27 21:56:49,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2808, PETRI_PLACES=121, PETRI_TRANSITIONS=212} [2023-01-27 21:56:49,818 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2023-01-27 21:56:49,818 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 212 transitions, 2808 flow [2023-01-27 21:56:49,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:49,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:56:49,819 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] [2023-01-27 21:56:49,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 21:56:50,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:56:50,026 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:56:50,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:56:50,026 INFO L85 PathProgramCache]: Analyzing trace with hash -643399995, now seen corresponding path program 8 times [2023-01-27 21:56:50,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:56:50,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388034684] [2023-01-27 21:56:50,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:56:50,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:56:50,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:56:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:56:50,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:56:50,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388034684] [2023-01-27 21:56:50,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388034684] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:56:50,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:56:50,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:56:50,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459990203] [2023-01-27 21:56:50,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:56:50,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 21:56:50,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:56:50,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 21:56:50,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-01-27 21:56:50,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 420 [2023-01-27 21:56:50,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 212 transitions, 2808 flow. Second operand has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:50,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:56:50,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 420 [2023-01-27 21:56:50,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:56:54,480 INFO L130 PetriNetUnfolder]: 27307/39969 cut-off events. [2023-01-27 21:56:54,481 INFO L131 PetriNetUnfolder]: For 219713/219713 co-relation queries the response was YES. [2023-01-27 21:56:54,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182852 conditions, 39969 events. 27307/39969 cut-off events. For 219713/219713 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 262416 event pairs, 11204 based on Foata normal form. 1096/41063 useless extension candidates. Maximal degree in co-relation 165853. Up to 33509 conditions per place. [2023-01-27 21:56:55,013 INFO L137 encePairwiseOnDemand]: 414/420 looper letters, 177 selfloop transitions, 88 changer transitions 6/271 dead transitions. [2023-01-27 21:56:55,013 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 271 transitions, 3657 flow [2023-01-27 21:56:55,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 21:56:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 21:56:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1163 transitions. [2023-01-27 21:56:55,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46150793650793653 [2023-01-27 21:56:55,029 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1163 transitions. [2023-01-27 21:56:55,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1163 transitions. [2023-01-27 21:56:55,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:56:55,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1163 transitions. [2023-01-27 21:56:55,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 193.83333333333334) internal successors, (1163), 6 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:55,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 420.0) internal successors, (2940), 7 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:55,044 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 420.0) internal successors, (2940), 7 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:55,044 INFO L175 Difference]: Start difference. First operand has 121 places, 212 transitions, 2808 flow. Second operand 6 states and 1163 transitions. [2023-01-27 21:56:55,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 271 transitions, 3657 flow [2023-01-27 21:56:57,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 271 transitions, 3433 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-01-27 21:56:57,196 INFO L231 Difference]: Finished difference. Result has 119 places, 208 transitions, 2735 flow [2023-01-27 21:56:57,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=2565, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2735, PETRI_PLACES=119, PETRI_TRANSITIONS=208} [2023-01-27 21:56:57,197 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2023-01-27 21:56:57,197 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 208 transitions, 2735 flow [2023-01-27 21:56:57,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:57,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:56:57,197 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] [2023-01-27 21:56:57,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-27 21:56:57,197 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:56:57,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:56:57,198 INFO L85 PathProgramCache]: Analyzing trace with hash 121245286, now seen corresponding path program 1 times [2023-01-27 21:56:57,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:56:57,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276006086] [2023-01-27 21:56:57,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:56:57,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:56:57,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:56:57,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:56:57,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:56:57,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276006086] [2023-01-27 21:56:57,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276006086] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:56:57,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:56:57,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:56:57,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326557825] [2023-01-27 21:56:57,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:56:57,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 21:56:57,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:56:57,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 21:56:57,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-27 21:56:57,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 420 [2023-01-27 21:56:57,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 208 transitions, 2735 flow. Second operand has 6 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:56:57,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:56:57,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 420 [2023-01-27 21:56:57,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:57:01,135 INFO L130 PetriNetUnfolder]: 25995/37549 cut-off events. [2023-01-27 21:57:01,135 INFO L131 PetriNetUnfolder]: For 150771/150771 co-relation queries the response was YES. [2023-01-27 21:57:01,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157381 conditions, 37549 events. 25995/37549 cut-off events. For 150771/150771 co-relation queries the response was YES. Maximal size of possible extension queue 1425. Compared 240288 event pairs, 7975 based on Foata normal form. 770/38317 useless extension candidates. Maximal degree in co-relation 150660. Up to 16603 conditions per place. [2023-01-27 21:57:01,604 INFO L137 encePairwiseOnDemand]: 413/420 looper letters, 292 selfloop transitions, 44 changer transitions 29/365 dead transitions. [2023-01-27 21:57:01,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 365 transitions, 4269 flow [2023-01-27 21:57:01,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 21:57:01,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 21:57:01,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1541 transitions. [2023-01-27 21:57:01,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45863095238095236 [2023-01-27 21:57:01,607 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1541 transitions. [2023-01-27 21:57:01,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1541 transitions. [2023-01-27 21:57:01,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:57:01,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1541 transitions. [2023-01-27 21:57:01,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 192.625) internal successors, (1541), 8 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:01,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:01,613 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:01,613 INFO L175 Difference]: Start difference. First operand has 119 places, 208 transitions, 2735 flow. Second operand 8 states and 1541 transitions. [2023-01-27 21:57:01,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 365 transitions, 4269 flow [2023-01-27 21:57:03,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 365 transitions, 3923 flow, removed 91 selfloop flow, removed 5 redundant places. [2023-01-27 21:57:03,508 INFO L231 Difference]: Finished difference. Result has 125 places, 200 transitions, 2307 flow [2023-01-27 21:57:03,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=2154, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2307, PETRI_PLACES=125, PETRI_TRANSITIONS=200} [2023-01-27 21:57:03,508 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2023-01-27 21:57:03,508 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 200 transitions, 2307 flow [2023-01-27 21:57:03,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:03,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:57:03,509 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] [2023-01-27 21:57:03,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-27 21:57:03,509 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:57:03,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:57:03,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2003128858, now seen corresponding path program 2 times [2023-01-27 21:57:03,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:57:03,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445520770] [2023-01-27 21:57:03,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:57:03,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:57:03,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:57:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:57:03,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:57:03,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445520770] [2023-01-27 21:57:03,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445520770] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:57:03,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628921708] [2023-01-27 21:57:03,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:57:03,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:57:03,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:57:03,741 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:57:03,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 21:57:03,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:57:03,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:57:03,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-27 21:57:03,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:57:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:57:04,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:57:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:57:04,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628921708] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 21:57:04,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 21:57:04,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2023-01-27 21:57:04,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588218126] [2023-01-27 21:57:04,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:57:04,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 21:57:04,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:57:04,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 21:57:04,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-01-27 21:57:04,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 420 [2023-01-27 21:57:04,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 200 transitions, 2307 flow. Second operand has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:04,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:57:04,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 420 [2023-01-27 21:57:04,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:57:09,787 INFO L130 PetriNetUnfolder]: 34401/50117 cut-off events. [2023-01-27 21:57:09,787 INFO L131 PetriNetUnfolder]: For 219223/219223 co-relation queries the response was YES. [2023-01-27 21:57:10,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219129 conditions, 50117 events. 34401/50117 cut-off events. For 219223/219223 co-relation queries the response was YES. Maximal size of possible extension queue 1863. Compared 342644 event pairs, 7853 based on Foata normal form. 488/50603 useless extension candidates. Maximal degree in co-relation 214606. Up to 17700 conditions per place. [2023-01-27 21:57:10,223 INFO L137 encePairwiseOnDemand]: 413/420 looper letters, 283 selfloop transitions, 81 changer transitions 3/367 dead transitions. [2023-01-27 21:57:10,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 367 transitions, 4066 flow [2023-01-27 21:57:10,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 21:57:10,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 21:57:10,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1582 transitions. [2023-01-27 21:57:10,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708333333333333 [2023-01-27 21:57:10,231 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1582 transitions. [2023-01-27 21:57:10,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1582 transitions. [2023-01-27 21:57:10,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:57:10,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1582 transitions. [2023-01-27 21:57:10,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 197.75) internal successors, (1582), 8 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:10,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:10,248 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:10,248 INFO L175 Difference]: Start difference. First operand has 125 places, 200 transitions, 2307 flow. Second operand 8 states and 1582 transitions. [2023-01-27 21:57:10,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 367 transitions, 4066 flow [2023-01-27 21:57:11,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 367 transitions, 3983 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-27 21:57:11,808 INFO L231 Difference]: Finished difference. Result has 133 places, 221 transitions, 2771 flow [2023-01-27 21:57:11,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=2237, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2771, PETRI_PLACES=133, PETRI_TRANSITIONS=221} [2023-01-27 21:57:11,809 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2023-01-27 21:57:11,809 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 221 transitions, 2771 flow [2023-01-27 21:57:11,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:11,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:57:11,809 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] [2023-01-27 21:57:11,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-27 21:57:12,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-27 21:57:12,014 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:57:12,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:57:12,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1008138826, now seen corresponding path program 3 times [2023-01-27 21:57:12,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:57:12,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869966656] [2023-01-27 21:57:12,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:57:12,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:57:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:57:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:57:12,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:57:12,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869966656] [2023-01-27 21:57:12,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869966656] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:57:12,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:57:12,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:57:12,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874046921] [2023-01-27 21:57:12,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:57:12,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 21:57:12,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:57:12,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 21:57:12,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-27 21:57:12,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 420 [2023-01-27 21:57:12,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 221 transitions, 2771 flow. Second operand has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:12,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:57:12,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 420 [2023-01-27 21:57:12,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:57:18,271 INFO L130 PetriNetUnfolder]: 34933/50957 cut-off events. [2023-01-27 21:57:18,271 INFO L131 PetriNetUnfolder]: For 312871/312871 co-relation queries the response was YES. [2023-01-27 21:57:18,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239304 conditions, 50957 events. 34933/50957 cut-off events. For 312871/312871 co-relation queries the response was YES. Maximal size of possible extension queue 1927. Compared 344134 event pairs, 13516 based on Foata normal form. 580/51535 useless extension candidates. Maximal degree in co-relation 234591. Up to 39127 conditions per place. [2023-01-27 21:57:19,040 INFO L137 encePairwiseOnDemand]: 413/420 looper letters, 248 selfloop transitions, 71 changer transitions 19/338 dead transitions. [2023-01-27 21:57:19,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 338 transitions, 4240 flow [2023-01-27 21:57:19,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 21:57:19,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 21:57:19,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1552 transitions. [2023-01-27 21:57:19,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2023-01-27 21:57:19,042 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1552 transitions. [2023-01-27 21:57:19,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1552 transitions. [2023-01-27 21:57:19,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:57:19,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1552 transitions. [2023-01-27 21:57:19,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 194.0) internal successors, (1552), 8 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:19,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:19,047 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 420.0) internal successors, (3780), 9 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:19,047 INFO L175 Difference]: Start difference. First operand has 133 places, 221 transitions, 2771 flow. Second operand 8 states and 1552 transitions. [2023-01-27 21:57:19,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 338 transitions, 4240 flow [2023-01-27 21:57:21,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 338 transitions, 4174 flow, removed 33 selfloop flow, removed 0 redundant places. [2023-01-27 21:57:21,816 INFO L231 Difference]: Finished difference. Result has 141 places, 228 transitions, 2978 flow [2023-01-27 21:57:21,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=2617, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2978, PETRI_PLACES=141, PETRI_TRANSITIONS=228} [2023-01-27 21:57:21,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2023-01-27 21:57:21,817 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 228 transitions, 2978 flow [2023-01-27 21:57:21,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:21,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:57:21,817 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] [2023-01-27 21:57:21,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-01-27 21:57:21,817 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:57:21,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:57:21,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1255457046, now seen corresponding path program 4 times [2023-01-27 21:57:21,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:57:21,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718580349] [2023-01-27 21:57:21,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:57:21,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:57:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:57:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:57:22,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:57:22,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718580349] [2023-01-27 21:57:22,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718580349] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:57:22,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147090869] [2023-01-27 21:57:22,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:57:22,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:57:22,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:57:22,008 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:57:22,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 21:57:22,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:57:22,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:57:22,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-27 21:57:22,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:57:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:57:22,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:57:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:57:22,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147090869] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:57:22,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:57:22,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 16 [2023-01-27 21:57:22,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828853006] [2023-01-27 21:57:22,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:57:22,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 21:57:22,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:57:22,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 21:57:22,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-01-27 21:57:22,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 420 [2023-01-27 21:57:22,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 228 transitions, 2978 flow. Second operand has 17 states, 17 states have (on average 171.94117647058823) internal successors, (2923), 17 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:22,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:57:22,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 420 [2023-01-27 21:57:22,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:57:30,709 INFO L130 PetriNetUnfolder]: 42691/63978 cut-off events. [2023-01-27 21:57:30,709 INFO L131 PetriNetUnfolder]: For 379837/379837 co-relation queries the response was YES. [2023-01-27 21:57:31,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298546 conditions, 63978 events. 42691/63978 cut-off events. For 379837/379837 co-relation queries the response was YES. Maximal size of possible extension queue 2551. Compared 480074 event pairs, 4324 based on Foata normal form. 1990/65966 useless extension candidates. Maximal degree in co-relation 293268. Up to 14382 conditions per place. [2023-01-27 21:57:31,354 INFO L137 encePairwiseOnDemand]: 407/420 looper letters, 548 selfloop transitions, 334 changer transitions 31/913 dead transitions. [2023-01-27 21:57:31,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 913 transitions, 11117 flow [2023-01-27 21:57:31,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-27 21:57:31,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-27 21:57:31,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 5267 transitions. [2023-01-27 21:57:31,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43243021346469623 [2023-01-27 21:57:31,358 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 5267 transitions. [2023-01-27 21:57:31,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 5267 transitions. [2023-01-27 21:57:31,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:57:31,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 5267 transitions. [2023-01-27 21:57:31,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 181.6206896551724) internal successors, (5267), 29 states have internal predecessors, (5267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:31,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 420.0) internal successors, (12600), 30 states have internal predecessors, (12600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:31,370 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 420.0) internal successors, (12600), 30 states have internal predecessors, (12600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:31,370 INFO L175 Difference]: Start difference. First operand has 141 places, 228 transitions, 2978 flow. Second operand 29 states and 5267 transitions. [2023-01-27 21:57:31,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 913 transitions, 11117 flow [2023-01-27 21:57:34,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 913 transitions, 10870 flow, removed 42 selfloop flow, removed 4 redundant places. [2023-01-27 21:57:34,954 INFO L231 Difference]: Finished difference. Result has 182 places, 471 transitions, 7007 flow [2023-01-27 21:57:34,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=2861, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=7007, PETRI_PLACES=182, PETRI_TRANSITIONS=471} [2023-01-27 21:57:34,955 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2023-01-27 21:57:34,955 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 471 transitions, 7007 flow [2023-01-27 21:57:34,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 171.94117647058823) internal successors, (2923), 17 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:34,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:57:34,955 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] [2023-01-27 21:57:34,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-01-27 21:57:35,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-27 21:57:35,160 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:57:35,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:57:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash 417644422, now seen corresponding path program 5 times [2023-01-27 21:57:35,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:57:35,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766831518] [2023-01-27 21:57:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:57:35,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:57:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:57:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:57:35,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:57:35,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766831518] [2023-01-27 21:57:35,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766831518] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:57:35,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686315257] [2023-01-27 21:57:35,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:57:35,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:57:35,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:57:35,386 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:57:35,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 21:57:35,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:57:35,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:57:35,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 21:57:35,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:57:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:57:35,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:57:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:57:35,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686315257] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 21:57:35,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 21:57:35,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 6] total 16 [2023-01-27 21:57:35,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557511206] [2023-01-27 21:57:35,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:57:35,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 21:57:35,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:57:35,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 21:57:35,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-01-27 21:57:35,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 420 [2023-01-27 21:57:35,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 471 transitions, 7007 flow. Second operand has 8 states, 8 states have (on average 179.875) internal successors, (1439), 8 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:35,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:57:35,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 420 [2023-01-27 21:57:35,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:57:48,588 INFO L130 PetriNetUnfolder]: 55583/83322 cut-off events. [2023-01-27 21:57:48,588 INFO L131 PetriNetUnfolder]: For 801227/801227 co-relation queries the response was YES. [2023-01-27 21:57:49,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468428 conditions, 83322 events. 55583/83322 cut-off events. For 801227/801227 co-relation queries the response was YES. Maximal size of possible extension queue 3392. Compared 643358 event pairs, 10228 based on Foata normal form. 288/83608 useless extension candidates. Maximal degree in co-relation 461270. Up to 24841 conditions per place. [2023-01-27 21:57:50,039 INFO L137 encePairwiseOnDemand]: 408/420 looper letters, 496 selfloop transitions, 328 changer transitions 14/838 dead transitions. [2023-01-27 21:57:50,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 838 transitions, 13046 flow [2023-01-27 21:57:50,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 21:57:50,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 21:57:50,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1948 transitions. [2023-01-27 21:57:50,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638095238095238 [2023-01-27 21:57:50,041 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1948 transitions. [2023-01-27 21:57:50,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1948 transitions. [2023-01-27 21:57:50,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:57:50,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1948 transitions. [2023-01-27 21:57:50,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 194.8) internal successors, (1948), 10 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:50,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 420.0) internal successors, (4620), 11 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:50,045 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 420.0) internal successors, (4620), 11 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:57:50,045 INFO L175 Difference]: Start difference. First operand has 182 places, 471 transitions, 7007 flow. Second operand 10 states and 1948 transitions. [2023-01-27 21:57:50,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 838 transitions, 13046 flow [2023-01-27 21:58:11,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 838 transitions, 12366 flow, removed 283 selfloop flow, removed 3 redundant places. [2023-01-27 21:58:11,679 INFO L231 Difference]: Finished difference. Result has 194 places, 606 transitions, 9816 flow [2023-01-27 21:58:11,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=6631, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9816, PETRI_PLACES=194, PETRI_TRANSITIONS=606} [2023-01-27 21:58:11,679 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2023-01-27 21:58:11,679 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 606 transitions, 9816 flow [2023-01-27 21:58:11,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 179.875) internal successors, (1439), 8 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:58:11,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:58:11,680 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] [2023-01-27 21:58:11,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-01-27 21:58:11,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-27 21:58:11,884 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:58:11,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:58:11,884 INFO L85 PathProgramCache]: Analyzing trace with hash 134795650, now seen corresponding path program 6 times [2023-01-27 21:58:11,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:58:11,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557463804] [2023-01-27 21:58:11,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:58:11,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:58:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:58:12,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:58:12,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:58:12,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557463804] [2023-01-27 21:58:12,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557463804] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:58:12,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496690539] [2023-01-27 21:58:12,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:58:12,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:58:12,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:58:12,150 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 21:58:12,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 21:58:12,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 21:58:12,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:58:12,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-27 21:58:12,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:58:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:58:12,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:58:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:58:12,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496690539] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-27 21:58:12,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-27 21:58:12,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 5] total 15 [2023-01-27 21:58:12,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389347084] [2023-01-27 21:58:12,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:58:12,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 21:58:12,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:58:12,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 21:58:12,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-01-27 21:58:12,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 420 [2023-01-27 21:58:12,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 606 transitions, 9816 flow. Second operand has 8 states, 8 states have (on average 179.875) internal successors, (1439), 8 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:58:12,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:58:12,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 420 [2023-01-27 21:58:12,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:58:22,773 INFO L130 PetriNetUnfolder]: 41247/60598 cut-off events. [2023-01-27 21:58:22,773 INFO L131 PetriNetUnfolder]: For 693625/693625 co-relation queries the response was YES. [2023-01-27 21:58:23,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362765 conditions, 60598 events. 41247/60598 cut-off events. For 693625/693625 co-relation queries the response was YES. Maximal size of possible extension queue 2465. Compared 430731 event pairs, 7858 based on Foata normal form. 1388/61984 useless extension candidates. Maximal degree in co-relation 355822. Up to 24977 conditions per place. [2023-01-27 21:58:23,792 INFO L137 encePairwiseOnDemand]: 411/420 looper letters, 461 selfloop transitions, 330 changer transitions 0/791 dead transitions. [2023-01-27 21:58:23,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 791 transitions, 13306 flow [2023-01-27 21:58:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 21:58:23,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 21:58:23,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1737 transitions. [2023-01-27 21:58:23,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2023-01-27 21:58:23,795 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1737 transitions. [2023-01-27 21:58:23,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1737 transitions. [2023-01-27 21:58:23,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:58:23,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1737 transitions. [2023-01-27 21:58:23,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 193.0) internal successors, (1737), 9 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:58:23,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 420.0) internal successors, (4200), 10 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:58:23,799 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 420.0) internal successors, (4200), 10 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:58:23,799 INFO L175 Difference]: Start difference. First operand has 194 places, 606 transitions, 9816 flow. Second operand 9 states and 1737 transitions. [2023-01-27 21:58:23,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 791 transitions, 13306 flow [2023-01-27 21:58:39,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 791 transitions, 12897 flow, removed 190 selfloop flow, removed 2 redundant places. [2023-01-27 21:58:39,455 INFO L231 Difference]: Finished difference. Result has 201 places, 617 transitions, 10488 flow [2023-01-27 21:58:39,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=9285, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10488, PETRI_PLACES=201, PETRI_TRANSITIONS=617} [2023-01-27 21:58:39,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2023-01-27 21:58:39,456 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 617 transitions, 10488 flow [2023-01-27 21:58:39,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 179.875) internal successors, (1439), 8 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:58:39,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:58:39,456 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] [2023-01-27 21:58:39,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-01-27 21:58:39,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:58:39,661 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:58:39,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:58:39,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1448728976, now seen corresponding path program 7 times [2023-01-27 21:58:39,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:58:39,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441548831] [2023-01-27 21:58:39,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:58:39,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:58:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:58:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:58:39,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:58:39,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441548831] [2023-01-27 21:58:39,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441548831] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:58:39,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:58:39,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:58:39,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87936621] [2023-01-27 21:58:39,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:58:39,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 21:58:39,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:58:39,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 21:58:39,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-01-27 21:58:39,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 420 [2023-01-27 21:58:39,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 617 transitions, 10488 flow. Second operand has 6 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:58:39,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:58:39,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 420 [2023-01-27 21:58:39,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:58:50,225 INFO L130 PetriNetUnfolder]: 41672/60924 cut-off events. [2023-01-27 21:58:50,225 INFO L131 PetriNetUnfolder]: For 718443/718443 co-relation queries the response was YES. [2023-01-27 21:58:51,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365245 conditions, 60924 events. 41672/60924 cut-off events. For 718443/718443 co-relation queries the response was YES. Maximal size of possible extension queue 2362. Compared 424766 event pairs, 10407 based on Foata normal form. 1350/62272 useless extension candidates. Maximal degree in co-relation 360715. Up to 27439 conditions per place. [2023-01-27 21:58:51,225 INFO L137 encePairwiseOnDemand]: 411/420 looper letters, 569 selfloop transitions, 345 changer transitions 16/930 dead transitions. [2023-01-27 21:58:51,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 930 transitions, 14930 flow [2023-01-27 21:58:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 21:58:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 21:58:51,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1921 transitions. [2023-01-27 21:58:51,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573809523809524 [2023-01-27 21:58:51,227 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1921 transitions. [2023-01-27 21:58:51,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1921 transitions. [2023-01-27 21:58:51,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:58:51,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1921 transitions. [2023-01-27 21:58:51,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 192.1) internal successors, (1921), 10 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:58:51,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 420.0) internal successors, (4620), 11 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:58:51,240 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 420.0) internal successors, (4620), 11 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:58:51,240 INFO L175 Difference]: Start difference. First operand has 201 places, 617 transitions, 10488 flow. Second operand 10 states and 1921 transitions. [2023-01-27 21:58:51,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 930 transitions, 14930 flow [2023-01-27 21:59:03,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 930 transitions, 13916 flow, removed 61 selfloop flow, removed 18 redundant places. [2023-01-27 21:59:03,509 INFO L231 Difference]: Finished difference. Result has 195 places, 674 transitions, 11215 flow [2023-01-27 21:59:03,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=9036, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11215, PETRI_PLACES=195, PETRI_TRANSITIONS=674} [2023-01-27 21:59:03,516 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2023-01-27 21:59:03,516 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 674 transitions, 11215 flow [2023-01-27 21:59:03,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:59:03,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:59:03,517 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] [2023-01-27 21:59:03,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-01-27 21:59:03,517 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:59:03,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:59:03,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1389569998, now seen corresponding path program 8 times [2023-01-27 21:59:03,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:59:03,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457943113] [2023-01-27 21:59:03,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:59:03,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:59:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:59:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:59:03,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:59:03,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457943113] [2023-01-27 21:59:03,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457943113] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:59:03,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:59:03,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:59:03,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727823765] [2023-01-27 21:59:03,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:59:03,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 21:59:03,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:59:03,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 21:59:03,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-27 21:59:03,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 420 [2023-01-27 21:59:03,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 674 transitions, 11215 flow. Second operand has 6 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:59:03,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:59:03,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 420 [2023-01-27 21:59:03,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:59:14,232 INFO L130 PetriNetUnfolder]: 41800/61210 cut-off events. [2023-01-27 21:59:14,232 INFO L131 PetriNetUnfolder]: For 689343/689343 co-relation queries the response was YES. [2023-01-27 21:59:14,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366155 conditions, 61210 events. 41800/61210 cut-off events. For 689343/689343 co-relation queries the response was YES. Maximal size of possible extension queue 2382. Compared 427813 event pairs, 13356 based on Foata normal form. 158/61366 useless extension candidates. Maximal degree in co-relation 358977. Up to 60114 conditions per place. [2023-01-27 21:59:15,064 INFO L137 encePairwiseOnDemand]: 414/420 looper letters, 616 selfloop transitions, 78 changer transitions 35/729 dead transitions. [2023-01-27 21:59:15,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 729 transitions, 13211 flow [2023-01-27 21:59:15,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:59:15,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:59:15,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1304 transitions. [2023-01-27 21:59:15,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435374149659864 [2023-01-27 21:59:15,066 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1304 transitions. [2023-01-27 21:59:15,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1304 transitions. [2023-01-27 21:59:15,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:59:15,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1304 transitions. [2023-01-27 21:59:15,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 186.28571428571428) internal successors, (1304), 7 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:59:15,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 420.0) internal successors, (3360), 8 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:59:15,069 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 420.0) internal successors, (3360), 8 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:59:15,069 INFO L175 Difference]: Start difference. First operand has 195 places, 674 transitions, 11215 flow. Second operand 7 states and 1304 transitions. [2023-01-27 21:59:15,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 729 transitions, 13211 flow [2023-01-27 21:59:27,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 729 transitions, 12919 flow, removed 32 selfloop flow, removed 3 redundant places. [2023-01-27 21:59:27,375 INFO L231 Difference]: Finished difference. Result has 199 places, 670 transitions, 11023 flow [2023-01-27 21:59:27,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=10929, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11023, PETRI_PLACES=199, PETRI_TRANSITIONS=670} [2023-01-27 21:59:27,376 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2023-01-27 21:59:27,376 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 670 transitions, 11023 flow [2023-01-27 21:59:27,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:59:27,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:59:27,376 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] [2023-01-27 21:59:27,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-01-27 21:59:27,376 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:59:27,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:59:27,376 INFO L85 PathProgramCache]: Analyzing trace with hash -21062198, now seen corresponding path program 9 times [2023-01-27 21:59:27,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:59:27,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986645953] [2023-01-27 21:59:27,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:59:27,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:59:27,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:59:27,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:59:27,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:59:27,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986645953] [2023-01-27 21:59:27,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986645953] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:59:27,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:59:27,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:59:27,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078461397] [2023-01-27 21:59:27,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:59:27,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 21:59:27,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:59:27,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 21:59:27,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-01-27 21:59:27,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 420 [2023-01-27 21:59:27,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 670 transitions, 11023 flow. Second operand has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:59:27,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:59:27,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 420 [2023-01-27 21:59:27,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:59:37,123 INFO L130 PetriNetUnfolder]: 38600/56104 cut-off events. [2023-01-27 21:59:37,123 INFO L131 PetriNetUnfolder]: For 621315/621315 co-relation queries the response was YES. [2023-01-27 21:59:37,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340561 conditions, 56104 events. 38600/56104 cut-off events. For 621315/621315 co-relation queries the response was YES. Maximal size of possible extension queue 2110. Compared 381594 event pairs, 11452 based on Foata normal form. 544/56646 useless extension candidates. Maximal degree in co-relation 339559. Up to 51966 conditions per place. [2023-01-27 21:59:37,986 INFO L137 encePairwiseOnDemand]: 414/420 looper letters, 592 selfloop transitions, 148 changer transitions 2/742 dead transitions. [2023-01-27 21:59:37,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 742 transitions, 13371 flow [2023-01-27 21:59:37,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 21:59:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 21:59:37,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1155 transitions. [2023-01-27 21:59:37,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-01-27 21:59:37,987 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1155 transitions. [2023-01-27 21:59:37,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1155 transitions. [2023-01-27 21:59:37,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:59:37,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1155 transitions. [2023-01-27 21:59:37,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.5) internal successors, (1155), 6 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:59:37,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 420.0) internal successors, (2940), 7 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:59:37,989 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 420.0) internal successors, (2940), 7 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:59:37,990 INFO L175 Difference]: Start difference. First operand has 199 places, 670 transitions, 11023 flow. Second operand 6 states and 1155 transitions. [2023-01-27 21:59:37,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 742 transitions, 13371 flow [2023-01-27 21:59:50,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 742 transitions, 12927 flow, removed 142 selfloop flow, removed 5 redundant places. [2023-01-27 21:59:50,849 INFO L231 Difference]: Finished difference. Result has 198 places, 682 transitions, 11360 flow [2023-01-27 21:59:50,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=10575, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11360, PETRI_PLACES=198, PETRI_TRANSITIONS=682} [2023-01-27 21:59:50,849 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2023-01-27 21:59:50,850 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 682 transitions, 11360 flow [2023-01-27 21:59:50,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.16666666666666) internal successors, (1099), 6 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:59:50,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:59:50,850 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] [2023-01-27 21:59:50,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-01-27 21:59:50,850 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:59:50,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:59:50,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1569054635, now seen corresponding path program 1 times [2023-01-27 21:59:50,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:59:50,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028963405] [2023-01-27 21:59:50,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:59:50,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:59:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:59:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:59:50,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:59:50,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028963405] [2023-01-27 21:59:50,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028963405] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:59:50,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:59:50,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 21:59:50,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253673805] [2023-01-27 21:59:50,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:59:50,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:59:50,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:59:50,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:59:50,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:59:50,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 420 [2023-01-27 21:59:50,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 682 transitions, 11360 flow. Second operand has 5 states, 5 states have (on average 192.8) internal successors, (964), 5 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:59:50,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:59:50,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 420 [2023-01-27 21:59:50,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 22:00:04,198 INFO L130 PetriNetUnfolder]: 52129/76065 cut-off events. [2023-01-27 22:00:04,198 INFO L131 PetriNetUnfolder]: For 850680/852570 co-relation queries the response was YES. [2023-01-27 22:00:05,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454232 conditions, 76065 events. 52129/76065 cut-off events. For 850680/852570 co-relation queries the response was YES. Maximal size of possible extension queue 3147. Compared 560101 event pairs, 8634 based on Foata normal form. 3287/79014 useless extension candidates. Maximal degree in co-relation 454142. Up to 29059 conditions per place. [2023-01-27 22:00:05,427 INFO L137 encePairwiseOnDemand]: 414/420 looper letters, 1008 selfloop transitions, 220 changer transitions 2/1346 dead transitions. [2023-01-27 22:00:05,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 1346 transitions, 24810 flow [2023-01-27 22:00:05,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 22:00:05,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 22:00:05,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1206 transitions. [2023-01-27 22:00:05,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2023-01-27 22:00:05,429 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1206 transitions. [2023-01-27 22:00:05,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1206 transitions. [2023-01-27 22:00:05,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 22:00:05,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1206 transitions. [2023-01-27 22:00:05,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 201.0) internal successors, (1206), 6 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:00:05,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 420.0) internal successors, (2940), 7 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:00:05,431 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 420.0) internal successors, (2940), 7 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:00:05,431 INFO L175 Difference]: Start difference. First operand has 198 places, 682 transitions, 11360 flow. Second operand 6 states and 1206 transitions. [2023-01-27 22:00:05,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 1346 transitions, 24810 flow [2023-01-27 22:00:24,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 1346 transitions, 23541 flow, removed 474 selfloop flow, removed 6 redundant places. [2023-01-27 22:00:24,718 INFO L231 Difference]: Finished difference. Result has 199 places, 773 transitions, 12766 flow [2023-01-27 22:00:24,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=420, PETRI_DIFFERENCE_MINUEND_FLOW=10751, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12766, PETRI_PLACES=199, PETRI_TRANSITIONS=773} [2023-01-27 22:00:24,719 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2023-01-27 22:00:24,719 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 773 transitions, 12766 flow [2023-01-27 22:00:24,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 192.8) internal successors, (964), 5 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:00:24,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 22:00:24,720 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] [2023-01-27 22:00:24,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-01-27 22:00:24,720 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 22:00:24,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 22:00:24,720 INFO L85 PathProgramCache]: Analyzing trace with hash -658408053, now seen corresponding path program 2 times [2023-01-27 22:00:24,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 22:00:24,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443936622] [2023-01-27 22:00:24,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 22:00:24,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 22:00:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 22:00:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:00:24,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 22:00:24,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443936622] [2023-01-27 22:00:24,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443936622] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 22:00:24,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991200220] [2023-01-27 22:00:24,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 22:00:24,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 22:00:24,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 22:00:24,917 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 22:00:24,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 22:00:25,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 22:00:25,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 22:00:25,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-27 22:00:25,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 22:00:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 22:00:25,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 22:00:25,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991200220] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 22:00:25,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 22:00:25,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-01-27 22:00:25,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216325507] [2023-01-27 22:00:25,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 22:00:25,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 22:00:25,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 22:00:25,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 22:00:25,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-01-27 22:00:25,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 420 [2023-01-27 22:00:25,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 773 transitions, 12766 flow. Second operand has 6 states, 6 states have (on average 178.5) internal successors, (1071), 6 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 22:00:25,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 22:00:25,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 420 [2023-01-27 22:00:25,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand