/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 10:44:56,902 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 10:44:56,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 10:44:56,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 10:44:56,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 10:44:56,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 10:44:56,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 10:44:56,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 10:44:56,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 10:44:56,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 10:44:56,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 10:44:56,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 10:44:56,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 10:44:56,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 10:44:56,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 10:44:56,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 10:44:56,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 10:44:56,954 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 10:44:56,956 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 10:44:56,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 10:44:56,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 10:44:56,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 10:44:56,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 10:44:56,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 10:44:56,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 10:44:56,969 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 10:44:56,969 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 10:44:56,970 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 10:44:56,970 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 10:44:56,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 10:44:56,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 10:44:56,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 10:44:56,972 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 10:44:56,972 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 10:44:56,973 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 10:44:56,973 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 10:44:56,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 10:44:56,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 10:44:56,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 10:44:56,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 10:44:56,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 10:44:56,976 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 10:44:56,996 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 10:44:56,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 10:44:56,997 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 10:44:56,997 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 10:44:56,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 10:44:56,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 10:44:56,998 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 10:44:56,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 10:44:56,998 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 10:44:56,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 10:44:56,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 10:44:56,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 10:44:56,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 10:44:56,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 10:44:56,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 10:44:57,000 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 10:44:57,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 10:44:57,000 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 10:44:57,000 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 10:44:57,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 10:44:57,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 10:44:57,000 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 10:44:57,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 10:44:57,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 10:44:57,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 10:44:57,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 10:44:57,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 10:44:57,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 10:44:57,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 10:44:57,001 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 10:44:57,001 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 10:44:57,001 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 10:44:57,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 10:44:57,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 10:44:57,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 10:44:57,224 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 10:44:57,224 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 10:44:57,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-mult.wvr.c [2023-01-28 10:44:58,161 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 10:44:58,344 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 10:44:58,345 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-mult.wvr.c [2023-01-28 10:44:58,349 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b518218f/eb07b2e930cb45819f387fafd2aa1552/FLAGe2d73fb3e [2023-01-28 10:44:58,358 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b518218f/eb07b2e930cb45819f387fafd2aa1552 [2023-01-28 10:44:58,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 10:44:58,361 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 10:44:58,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 10:44:58,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 10:44:58,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 10:44:58,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 10:44:58" (1/1) ... [2023-01-28 10:44:58,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@447cf410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:44:58, skipping insertion in model container [2023-01-28 10:44:58,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 10:44:58" (1/1) ... [2023-01-28 10:44:58,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 10:44:58,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 10:44:58,519 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-mult.wvr.c[4218,4231] [2023-01-28 10:44:58,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 10:44:58,536 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 10:44:58,557 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-mult.wvr.c[4218,4231] [2023-01-28 10:44:58,560 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 10:44:58,565 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 10:44:58,565 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 10:44:58,570 INFO L208 MainTranslator]: Completed translation [2023-01-28 10:44:58,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:44:58 WrapperNode [2023-01-28 10:44:58,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 10:44:58,571 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 10:44:58,571 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 10:44:58,571 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 10:44:58,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:44:58" (1/1) ... [2023-01-28 10:44:58,585 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:44:58" (1/1) ... [2023-01-28 10:44:58,607 INFO L138 Inliner]: procedures = 27, calls = 80, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 315 [2023-01-28 10:44:58,607 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 10:44:58,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 10:44:58,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 10:44:58,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 10:44:58,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:44:58" (1/1) ... [2023-01-28 10:44:58,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:44:58" (1/1) ... [2023-01-28 10:44:58,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:44:58" (1/1) ... [2023-01-28 10:44:58,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:44:58" (1/1) ... [2023-01-28 10:44:58,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:44:58" (1/1) ... [2023-01-28 10:44:58,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:44:58" (1/1) ... [2023-01-28 10:44:58,634 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:44:58" (1/1) ... [2023-01-28 10:44:58,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:44:58" (1/1) ... [2023-01-28 10:44:58,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 10:44:58,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 10:44:58,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 10:44:58,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 10:44:58,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:44:58" (1/1) ... [2023-01-28 10:44:58,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 10:44:58,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:44:58,661 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 10:44:58,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 10:44:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 10:44:58,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 10:44:58,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 10:44:58,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 10:44:58,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 10:44:58,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 10:44:58,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 10:44:58,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 10:44:58,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-28 10:44:58,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-28 10:44:58,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-01-28 10:44:58,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-01-28 10:44:58,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 10:44:58,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 10:44:58,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 10:44:58,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 10:44:58,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 10:44:58,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 10:44:58,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 10:44:58,693 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 10:44:58,812 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 10:44:58,813 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 10:44:59,145 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 10:44:59,319 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 10:44:59,320 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-01-28 10:44:59,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 10:44:59 BoogieIcfgContainer [2023-01-28 10:44:59,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 10:44:59,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 10:44:59,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 10:44:59,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 10:44:59,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 10:44:58" (1/3) ... [2023-01-28 10:44:59,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34823051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 10:44:59, skipping insertion in model container [2023-01-28 10:44:59,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:44:58" (2/3) ... [2023-01-28 10:44:59,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34823051 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 10:44:59, skipping insertion in model container [2023-01-28 10:44:59,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 10:44:59" (3/3) ... [2023-01-28 10:44:59,333 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult.wvr.c [2023-01-28 10:44:59,344 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 10:44:59,345 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 10:44:59,345 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 10:44:59,406 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-28 10:44:59,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 222 transitions, 476 flow [2023-01-28 10:44:59,481 INFO L130 PetriNetUnfolder]: 18/218 cut-off events. [2023-01-28 10:44:59,481 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 10:44:59,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 218 events. 18/218 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 118 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 181. Up to 2 conditions per place. [2023-01-28 10:44:59,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 222 transitions, 476 flow [2023-01-28 10:44:59,493 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 206 transitions, 436 flow [2023-01-28 10:44:59,495 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 10:44:59,501 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 201 places, 206 transitions, 436 flow [2023-01-28 10:44:59,502 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 201 places, 206 transitions, 436 flow [2023-01-28 10:44:59,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 206 transitions, 436 flow [2023-01-28 10:44:59,538 INFO L130 PetriNetUnfolder]: 18/206 cut-off events. [2023-01-28 10:44:59,538 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 10:44:59,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 206 events. 18/206 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 117 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 181. Up to 2 conditions per place. [2023-01-28 10:44:59,540 INFO L119 LiptonReduction]: Number of co-enabled transitions 2000 [2023-01-28 10:45:05,778 INFO L134 LiptonReduction]: Checked pairs total: 4193 [2023-01-28 10:45:05,778 INFO L136 LiptonReduction]: Total number of compositions: 196 [2023-01-28 10:45:05,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 10:45:05,792 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;@45f6224b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 10:45:05,792 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-28 10:45:05,797 INFO L130 PetriNetUnfolder]: 6/36 cut-off events. [2023-01-28 10:45:05,797 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 10:45:05,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:45:05,798 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] [2023-01-28 10:45:05,798 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)] === [2023-01-28 10:45:05,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:45:05,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1509683308, now seen corresponding path program 1 times [2023-01-28 10:45:05,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:45:05,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080179600] [2023-01-28 10:45:05,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:45:05,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:45:05,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:45:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:45:06,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:45:06,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080179600] [2023-01-28 10:45:06,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080179600] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:45:06,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:45:06,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 10:45:06,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579583850] [2023-01-28 10:45:06,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:45:06,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 10:45:06,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:45:06,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 10:45:06,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 10:45:06,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 418 [2023-01-28 10:45:06,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 98 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) [2023-01-28 10:45:06,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:45:06,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 418 [2023-01-28 10:45:06,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:45:06,632 INFO L130 PetriNetUnfolder]: 2606/3582 cut-off events. [2023-01-28 10:45:06,633 INFO L131 PetriNetUnfolder]: For 197/197 co-relation queries the response was YES. [2023-01-28 10:45:06,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7115 conditions, 3582 events. 2606/3582 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 16014 event pairs, 498 based on Foata normal form. 1/2284 useless extension candidates. Maximal degree in co-relation 5886. Up to 2275 conditions per place. [2023-01-28 10:45:06,658 INFO L137 encePairwiseOnDemand]: 414/418 looper letters, 47 selfloop transitions, 3 changer transitions 1/57 dead transitions. [2023-01-28 10:45:06,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 255 flow [2023-01-28 10:45:06,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 10:45:06,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 10:45:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2023-01-28 10:45:06,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031897926634769 [2023-01-28 10:45:06,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2023-01-28 10:45:06,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2023-01-28 10:45:06,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:45:06,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2023-01-28 10:45:06,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:06,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:06,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:06,689 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 98 flow. Second operand 3 states and 631 transitions. [2023-01-28 10:45:06,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 255 flow [2023-01-28 10:45:06,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 229 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-01-28 10:45:06,698 INFO L231 Difference]: Finished difference. Result has 39 places, 39 transitions, 101 flow [2023-01-28 10:45:06,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=82, 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=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=39} [2023-01-28 10:45:06,702 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2023-01-28 10:45:06,702 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 39 transitions, 101 flow [2023-01-28 10:45:06,703 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) [2023-01-28 10:45:06,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:45:06,703 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] [2023-01-28 10:45:06,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 10:45:06,704 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)] === [2023-01-28 10:45:06,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:45:06,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1065530984, now seen corresponding path program 1 times [2023-01-28 10:45:06,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:45:06,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009948222] [2023-01-28 10:45:06,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:45:06,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:45:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:45:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:45:06,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:45:06,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009948222] [2023-01-28 10:45:06,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009948222] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:45:06,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:45:06,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 10:45:06,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228363485] [2023-01-28 10:45:06,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:45:06,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 10:45:06,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:45:06,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 10:45:06,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 10:45:06,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 418 [2023-01-28 10:45:06,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 101 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) [2023-01-28 10:45:06,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:45:06,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 418 [2023-01-28 10:45:06,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:45:07,120 INFO L130 PetriNetUnfolder]: 3843/5059 cut-off events. [2023-01-28 10:45:07,120 INFO L131 PetriNetUnfolder]: For 752/752 co-relation queries the response was YES. [2023-01-28 10:45:07,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11188 conditions, 5059 events. 3843/5059 cut-off events. For 752/752 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 22520 event pairs, 982 based on Foata normal form. 120/4225 useless extension candidates. Maximal degree in co-relation 4007. Up to 3577 conditions per place. [2023-01-28 10:45:07,140 INFO L137 encePairwiseOnDemand]: 415/418 looper letters, 58 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-01-28 10:45:07,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 64 transitions, 285 flow [2023-01-28 10:45:07,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 10:45:07,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 10:45:07,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2023-01-28 10:45:07,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4984051036682616 [2023-01-28 10:45:07,142 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2023-01-28 10:45:07,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2023-01-28 10:45:07,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:45:07,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2023-01-28 10:45:07,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:07,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:07,146 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:07,146 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 101 flow. Second operand 3 states and 625 transitions. [2023-01-28 10:45:07,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 64 transitions, 285 flow [2023-01-28 10:45:07,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 64 transitions, 281 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 10:45:07,148 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 112 flow [2023-01-28 10:45:07,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-01-28 10:45:07,149 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2023-01-28 10:45:07,149 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 112 flow [2023-01-28 10:45:07,149 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) [2023-01-28 10:45:07,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:45:07,149 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] [2023-01-28 10:45:07,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 10:45:07,150 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)] === [2023-01-28 10:45:07,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:45:07,150 INFO L85 PathProgramCache]: Analyzing trace with hash 941262828, now seen corresponding path program 1 times [2023-01-28 10:45:07,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:45:07,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630949490] [2023-01-28 10:45:07,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:45:07,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:45:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:45:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:45:07,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:45:07,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630949490] [2023-01-28 10:45:07,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630949490] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:45:07,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:45:07,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 10:45:07,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671984904] [2023-01-28 10:45:07,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:45:07,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 10:45:07,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:45:07,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 10:45:07,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 10:45:07,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 418 [2023-01-28 10:45:07,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 112 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) [2023-01-28 10:45:07,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:45:07,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 418 [2023-01-28 10:45:07,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:45:07,535 INFO L130 PetriNetUnfolder]: 3600/4879 cut-off events. [2023-01-28 10:45:07,535 INFO L131 PetriNetUnfolder]: For 1832/1832 co-relation queries the response was YES. [2023-01-28 10:45:07,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11391 conditions, 4879 events. 3600/4879 cut-off events. For 1832/1832 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23024 event pairs, 937 based on Foata normal form. 106/4526 useless extension candidates. Maximal degree in co-relation 8167. Up to 3548 conditions per place. [2023-01-28 10:45:07,554 INFO L137 encePairwiseOnDemand]: 415/418 looper letters, 58 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-01-28 10:45:07,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 64 transitions, 301 flow [2023-01-28 10:45:07,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 10:45:07,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 10:45:07,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2023-01-28 10:45:07,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49681020733652315 [2023-01-28 10:45:07,557 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2023-01-28 10:45:07,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2023-01-28 10:45:07,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:45:07,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2023-01-28 10:45:07,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:07,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:07,561 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:07,561 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 112 flow. Second operand 3 states and 623 transitions. [2023-01-28 10:45:07,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 64 transitions, 301 flow [2023-01-28 10:45:07,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 64 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 10:45:07,563 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 124 flow [2023-01-28 10:45:07,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2023-01-28 10:45:07,563 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2023-01-28 10:45:07,564 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 124 flow [2023-01-28 10:45:07,564 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) [2023-01-28 10:45:07,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:45:07,564 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] [2023-01-28 10:45:07,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 10:45:07,564 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)] === [2023-01-28 10:45:07,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:45:07,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1633615522, now seen corresponding path program 1 times [2023-01-28 10:45:07,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:45:07,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288693373] [2023-01-28 10:45:07,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:45:07,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:45:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:45:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:45:07,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:45:07,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288693373] [2023-01-28 10:45:07,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288693373] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:45:07,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:45:07,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 10:45:07,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2628164] [2023-01-28 10:45:07,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:45:07,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 10:45:07,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:45:07,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 10:45:07,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 10:45:07,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 418 [2023-01-28 10:45:07,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 176.5) internal successors, (706), 4 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:07,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:45:07,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 418 [2023-01-28 10:45:07,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:45:08,100 INFO L130 PetriNetUnfolder]: 3800/5543 cut-off events. [2023-01-28 10:45:08,100 INFO L131 PetriNetUnfolder]: For 2941/2941 co-relation queries the response was YES. [2023-01-28 10:45:08,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13410 conditions, 5543 events. 3800/5543 cut-off events. For 2941/2941 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 31121 event pairs, 2883 based on Foata normal form. 191/5572 useless extension candidates. Maximal degree in co-relation 6587. Up to 3495 conditions per place. [2023-01-28 10:45:08,122 INFO L137 encePairwiseOnDemand]: 413/418 looper letters, 87 selfloop transitions, 4 changer transitions 0/97 dead transitions. [2023-01-28 10:45:08,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 97 transitions, 464 flow [2023-01-28 10:45:08,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:45:08,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:45:08,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 935 transitions. [2023-01-28 10:45:08,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4473684210526316 [2023-01-28 10:45:08,124 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 935 transitions. [2023-01-28 10:45:08,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 935 transitions. [2023-01-28 10:45:08,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:45:08,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 935 transitions. [2023-01-28 10:45:08,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 187.0) internal successors, (935), 5 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:08,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 418.0) internal successors, (2508), 6 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:08,129 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 418.0) internal successors, (2508), 6 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:08,129 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 124 flow. Second operand 5 states and 935 transitions. [2023-01-28 10:45:08,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 97 transitions, 464 flow [2023-01-28 10:45:08,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 97 transitions, 460 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 10:45:08,132 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 152 flow [2023-01-28 10:45:08,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=42, 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=152, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2023-01-28 10:45:08,133 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2023-01-28 10:45:08,133 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 152 flow [2023-01-28 10:45:08,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.5) internal successors, (706), 4 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:08,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:45:08,133 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] [2023-01-28 10:45:08,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 10:45:08,134 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)] === [2023-01-28 10:45:08,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:45:08,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1505087545, now seen corresponding path program 1 times [2023-01-28 10:45:08,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:45:08,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246454842] [2023-01-28 10:45:08,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:45:08,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:45:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:45:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:45:08,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:45:08,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246454842] [2023-01-28 10:45:08,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246454842] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:45:08,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:45:08,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 10:45:08,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895609698] [2023-01-28 10:45:08,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:45:08,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 10:45:08,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:45:08,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 10:45:08,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 10:45:08,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 418 [2023-01-28 10:45:08,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 176.5) internal successors, (706), 4 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:08,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:45:08,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 418 [2023-01-28 10:45:08,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:45:08,695 INFO L130 PetriNetUnfolder]: 3929/5803 cut-off events. [2023-01-28 10:45:08,696 INFO L131 PetriNetUnfolder]: For 3574/3574 co-relation queries the response was YES. [2023-01-28 10:45:08,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14011 conditions, 5803 events. 3929/5803 cut-off events. For 3574/3574 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 33514 event pairs, 3012 based on Foata normal form. 161/5793 useless extension candidates. Maximal degree in co-relation 11382. Up to 4406 conditions per place. [2023-01-28 10:45:08,722 INFO L137 encePairwiseOnDemand]: 414/418 looper letters, 60 selfloop transitions, 5 changer transitions 0/71 dead transitions. [2023-01-28 10:45:08,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 364 flow [2023-01-28 10:45:08,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 10:45:08,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 10:45:08,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 737 transitions. [2023-01-28 10:45:08,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4407894736842105 [2023-01-28 10:45:08,724 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 737 transitions. [2023-01-28 10:45:08,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 737 transitions. [2023-01-28 10:45:08,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:45:08,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 737 transitions. [2023-01-28 10:45:08,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 184.25) internal successors, (737), 4 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:08,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 418.0) internal successors, (2090), 5 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:08,728 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 418.0) internal successors, (2090), 5 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:08,728 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 152 flow. Second operand 4 states and 737 transitions. [2023-01-28 10:45:08,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 364 flow [2023-01-28 10:45:08,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 360 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 10:45:08,732 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 176 flow [2023-01-28 10:45:08,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-01-28 10:45:08,732 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2023-01-28 10:45:08,732 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 176 flow [2023-01-28 10:45:08,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.5) internal successors, (706), 4 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:08,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:45:08,733 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] [2023-01-28 10:45:08,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 10:45:08,733 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)] === [2023-01-28 10:45:08,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:45:08,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1928943663, now seen corresponding path program 1 times [2023-01-28 10:45:08,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:45:08,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568351768] [2023-01-28 10:45:08,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:45:08,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:45:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:45:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:45:09,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:45:09,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568351768] [2023-01-28 10:45:09,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568351768] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:45:09,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378881226] [2023-01-28 10:45:09,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:45:09,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:45:09,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:45:09,017 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:45:09,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 10:45:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:45:09,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 10:45:09,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:45:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:45:09,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 10:45:09,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378881226] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:45:09,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 10:45:09,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-01-28 10:45:09,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486964708] [2023-01-28 10:45:09,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:45:09,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:45:09,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:45:09,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:45:09,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-01-28 10:45:09,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 418 [2023-01-28 10:45:09,356 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 183.33333333333334) internal successors, (1100), 6 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:09,356 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:45:09,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 418 [2023-01-28 10:45:09,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:45:10,747 INFO L130 PetriNetUnfolder]: 14993/20562 cut-off events. [2023-01-28 10:45:10,747 INFO L131 PetriNetUnfolder]: For 7255/7255 co-relation queries the response was YES. [2023-01-28 10:45:10,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48266 conditions, 20562 events. 14993/20562 cut-off events. For 7255/7255 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 108887 event pairs, 1082 based on Foata normal form. 372/20934 useless extension candidates. Maximal degree in co-relation 38127. Up to 8096 conditions per place. [2023-01-28 10:45:10,807 INFO L137 encePairwiseOnDemand]: 412/418 looper letters, 129 selfloop transitions, 8 changer transitions 5/142 dead transitions. [2023-01-28 10:45:10,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 142 transitions, 743 flow [2023-01-28 10:45:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 10:45:10,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 10:45:10,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1197 transitions. [2023-01-28 10:45:10,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2023-01-28 10:45:10,810 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1197 transitions. [2023-01-28 10:45:10,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1197 transitions. [2023-01-28 10:45:10,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:45:10,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1197 transitions. [2023-01-28 10:45:10,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:10,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 418.0) internal successors, (2926), 7 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:10,815 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 418.0) internal successors, (2926), 7 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:10,815 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 176 flow. Second operand 6 states and 1197 transitions. [2023-01-28 10:45:10,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 142 transitions, 743 flow [2023-01-28 10:45:10,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 142 transitions, 735 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-28 10:45:10,819 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 225 flow [2023-01-28 10:45:10,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=225, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-01-28 10:45:10,819 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 17 predicate places. [2023-01-28 10:45:10,820 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 225 flow [2023-01-28 10:45:10,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.33333333333334) internal successors, (1100), 6 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:10,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:45:10,820 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] [2023-01-28 10:45:10,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 10:45:11,029 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 [2023-01-28 10:45:11,031 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)] === [2023-01-28 10:45:11,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:45:11,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2129272553, now seen corresponding path program 2 times [2023-01-28 10:45:11,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:45:11,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348133472] [2023-01-28 10:45:11,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:45:11,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:45:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:45:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:45:11,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:45:11,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348133472] [2023-01-28 10:45:11,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348133472] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:45:11,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:45:11,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-28 10:45:11,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279575579] [2023-01-28 10:45:11,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:45:11,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 10:45:11,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:45:11,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 10:45:11,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-01-28 10:45:11,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 418 [2023-01-28 10:45:11,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 225 flow. Second operand has 7 states, 7 states have (on average 182.57142857142858) internal successors, (1278), 7 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:11,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:45:11,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 418 [2023-01-28 10:45:11,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:45:12,986 INFO L130 PetriNetUnfolder]: 17581/24432 cut-off events. [2023-01-28 10:45:12,986 INFO L131 PetriNetUnfolder]: For 15466/15466 co-relation queries the response was YES. [2023-01-28 10:45:13,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63749 conditions, 24432 events. 17581/24432 cut-off events. For 15466/15466 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 136753 event pairs, 1820 based on Foata normal form. 152/24584 useless extension candidates. Maximal degree in co-relation 51151. Up to 16026 conditions per place. [2023-01-28 10:45:13,118 INFO L137 encePairwiseOnDemand]: 411/418 looper letters, 121 selfloop transitions, 11 changer transitions 26/158 dead transitions. [2023-01-28 10:45:13,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 158 transitions, 862 flow [2023-01-28 10:45:13,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:45:13,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:45:13,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1386 transitions. [2023-01-28 10:45:13,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2023-01-28 10:45:13,121 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1386 transitions. [2023-01-28 10:45:13,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1386 transitions. [2023-01-28 10:45:13,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:45:13,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1386 transitions. [2023-01-28 10:45:13,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 198.0) internal successors, (1386), 7 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:13,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 418.0) internal successors, (3344), 8 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:13,127 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 418.0) internal successors, (3344), 8 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:13,127 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 225 flow. Second operand 7 states and 1386 transitions. [2023-01-28 10:45:13,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 158 transitions, 862 flow [2023-01-28 10:45:13,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 158 transitions, 862 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 10:45:13,146 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 304 flow [2023-01-28 10:45:13,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=304, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2023-01-28 10:45:13,146 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2023-01-28 10:45:13,146 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 304 flow [2023-01-28 10:45:13,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 182.57142857142858) internal successors, (1278), 7 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:13,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:45:13,147 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] [2023-01-28 10:45:13,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 10:45:13,147 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)] === [2023-01-28 10:45:13,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:45:13,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1924159533, now seen corresponding path program 1 times [2023-01-28 10:45:13,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:45:13,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132147842] [2023-01-28 10:45:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:45:13,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:45:13,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:45:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:45:13,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:45:13,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132147842] [2023-01-28 10:45:13,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132147842] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:45:13,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:45:13,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-28 10:45:13,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638052769] [2023-01-28 10:45:13,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:45:13,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 10:45:13,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:45:13,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 10:45:13,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-01-28 10:45:13,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 418 [2023-01-28 10:45:13,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 304 flow. Second operand has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:13,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:45:13,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 418 [2023-01-28 10:45:13,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:45:15,151 INFO L130 PetriNetUnfolder]: 17981/25034 cut-off events. [2023-01-28 10:45:15,151 INFO L131 PetriNetUnfolder]: For 28623/28623 co-relation queries the response was YES. [2023-01-28 10:45:15,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73406 conditions, 25034 events. 17981/25034 cut-off events. For 28623/28623 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 139988 event pairs, 2406 based on Foata normal form. 112/25146 useless extension candidates. Maximal degree in co-relation 61767. Up to 18608 conditions per place. [2023-01-28 10:45:15,269 INFO L137 encePairwiseOnDemand]: 411/418 looper letters, 96 selfloop transitions, 9 changer transitions 38/143 dead transitions. [2023-01-28 10:45:15,270 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 143 transitions, 872 flow [2023-01-28 10:45:15,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:45:15,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:45:15,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1339 transitions. [2023-01-28 10:45:15,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45762132604237865 [2023-01-28 10:45:15,273 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1339 transitions. [2023-01-28 10:45:15,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1339 transitions. [2023-01-28 10:45:15,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:45:15,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1339 transitions. [2023-01-28 10:45:15,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 191.28571428571428) internal successors, (1339), 7 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:15,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 418.0) internal successors, (3344), 8 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:15,279 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 418.0) internal successors, (3344), 8 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:15,279 INFO L175 Difference]: Start difference. First operand has 72 places, 60 transitions, 304 flow. Second operand 7 states and 1339 transitions. [2023-01-28 10:45:15,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 143 transitions, 872 flow [2023-01-28 10:45:15,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 143 transitions, 868 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-28 10:45:15,331 INFO L231 Difference]: Finished difference. Result has 80 places, 66 transitions, 376 flow [2023-01-28 10:45:15,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=376, PETRI_PLACES=80, PETRI_TRANSITIONS=66} [2023-01-28 10:45:15,333 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2023-01-28 10:45:15,333 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 66 transitions, 376 flow [2023-01-28 10:45:15,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.0) internal successors, (1424), 8 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:15,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:45:15,334 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] [2023-01-28 10:45:15,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 10:45:15,335 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)] === [2023-01-28 10:45:15,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:45:15,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1788330293, now seen corresponding path program 2 times [2023-01-28 10:45:15,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:45:15,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947166323] [2023-01-28 10:45:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:45:15,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:45:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:45:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:45:15,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:45:15,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947166323] [2023-01-28 10:45:15,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947166323] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:45:15,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:45:15,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-28 10:45:15,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429121044] [2023-01-28 10:45:15,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:45:15,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 10:45:15,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:45:15,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 10:45:15,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-01-28 10:45:15,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 418 [2023-01-28 10:45:15,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 66 transitions, 376 flow. Second operand has 7 states, 7 states have (on average 178.57142857142858) internal successors, (1250), 7 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:15,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:45:15,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 418 [2023-01-28 10:45:15,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:45:18,004 INFO L130 PetriNetUnfolder]: 19601/27472 cut-off events. [2023-01-28 10:45:18,004 INFO L131 PetriNetUnfolder]: For 42795/42795 co-relation queries the response was YES. [2023-01-28 10:45:18,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89117 conditions, 27472 events. 19601/27472 cut-off events. For 42795/42795 co-relation queries the response was YES. Maximal size of possible extension queue 850. Compared 158156 event pairs, 2960 based on Foata normal form. 136/27608 useless extension candidates. Maximal degree in co-relation 75314. Up to 18520 conditions per place. [2023-01-28 10:45:18,149 INFO L137 encePairwiseOnDemand]: 409/418 looper letters, 148 selfloop transitions, 38 changer transitions 23/209 dead transitions. [2023-01-28 10:45:18,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 209 transitions, 1513 flow [2023-01-28 10:45:18,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:45:18,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:45:18,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1547 transitions. [2023-01-28 10:45:18,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4626196172248804 [2023-01-28 10:45:18,153 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1547 transitions. [2023-01-28 10:45:18,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1547 transitions. [2023-01-28 10:45:18,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:45:18,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1547 transitions. [2023-01-28 10:45:18,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 193.375) internal successors, (1547), 8 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:18,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 418.0) internal successors, (3762), 9 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:18,163 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 418.0) internal successors, (3762), 9 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:18,163 INFO L175 Difference]: Start difference. First operand has 80 places, 66 transitions, 376 flow. Second operand 8 states and 1547 transitions. [2023-01-28 10:45:18,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 209 transitions, 1513 flow [2023-01-28 10:45:18,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 209 transitions, 1503 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-01-28 10:45:18,214 INFO L231 Difference]: Finished difference. Result has 90 places, 100 transitions, 774 flow [2023-01-28 10:45:18,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=774, PETRI_PLACES=90, PETRI_TRANSITIONS=100} [2023-01-28 10:45:18,215 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2023-01-28 10:45:18,215 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 100 transitions, 774 flow [2023-01-28 10:45:18,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 178.57142857142858) internal successors, (1250), 7 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:18,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:45:18,216 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] [2023-01-28 10:45:18,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 10:45:18,217 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)] === [2023-01-28 10:45:18,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:45:18,218 INFO L85 PathProgramCache]: Analyzing trace with hash -377808973, now seen corresponding path program 3 times [2023-01-28 10:45:18,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:45:18,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150480837] [2023-01-28 10:45:18,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:45:18,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:45:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:45:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:45:18,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:45:18,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150480837] [2023-01-28 10:45:18,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150480837] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:45:18,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113127409] [2023-01-28 10:45:18,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:45:18,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:45:18,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:45:18,399 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:45:18,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 10:45:18,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:45:18,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:45:18,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 10:45:18,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:45:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:45:18,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 10:45:18,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113127409] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:45:18,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 10:45:18,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2023-01-28 10:45:18,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231256078] [2023-01-28 10:45:18,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:45:18,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 10:45:18,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:45:18,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 10:45:18,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-01-28 10:45:18,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 418 [2023-01-28 10:45:18,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 100 transitions, 774 flow. Second operand has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:18,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:45:18,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 418 [2023-01-28 10:45:18,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:45:22,155 INFO L130 PetriNetUnfolder]: 26157/38061 cut-off events. [2023-01-28 10:45:22,155 INFO L131 PetriNetUnfolder]: For 84579/84579 co-relation queries the response was YES. [2023-01-28 10:45:22,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139075 conditions, 38061 events. 26157/38061 cut-off events. For 84579/84579 co-relation queries the response was YES. Maximal size of possible extension queue 1297. Compared 249278 event pairs, 3864 based on Foata normal form. 868/38929 useless extension candidates. Maximal degree in co-relation 127775. Up to 17760 conditions per place. [2023-01-28 10:45:22,390 INFO L137 encePairwiseOnDemand]: 407/418 looper letters, 189 selfloop transitions, 88 changer transitions 65/342 dead transitions. [2023-01-28 10:45:22,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 342 transitions, 2791 flow [2023-01-28 10:45:22,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 10:45:22,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 10:45:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2342 transitions. [2023-01-28 10:45:22,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46690590111642744 [2023-01-28 10:45:22,396 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2342 transitions. [2023-01-28 10:45:22,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2342 transitions. [2023-01-28 10:45:22,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:45:22,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2342 transitions. [2023-01-28 10:45:22,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 195.16666666666666) internal successors, (2342), 12 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:22,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 418.0) internal successors, (5434), 13 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:22,405 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 418.0) internal successors, (5434), 13 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:22,406 INFO L175 Difference]: Start difference. First operand has 90 places, 100 transitions, 774 flow. Second operand 12 states and 2342 transitions. [2023-01-28 10:45:22,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 342 transitions, 2791 flow [2023-01-28 10:45:23,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 342 transitions, 2781 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-01-28 10:45:23,082 INFO L231 Difference]: Finished difference. Result has 110 places, 153 transitions, 1613 flow [2023-01-28 10:45:23,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1613, PETRI_PLACES=110, PETRI_TRANSITIONS=153} [2023-01-28 10:45:23,082 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2023-01-28 10:45:23,082 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 153 transitions, 1613 flow [2023-01-28 10:45:23,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:23,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:45:23,083 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] [2023-01-28 10:45:23,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-28 10:45:23,287 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,SelfDestructingSolverStorable9 [2023-01-28 10:45:23,288 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)] === [2023-01-28 10:45:23,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:45:23,288 INFO L85 PathProgramCache]: Analyzing trace with hash -793589149, now seen corresponding path program 4 times [2023-01-28 10:45:23,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:45:23,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878834548] [2023-01-28 10:45:23,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:45:23,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:45:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:45:23,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:45:23,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:45:23,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878834548] [2023-01-28 10:45:23,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878834548] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:45:23,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841459176] [2023-01-28 10:45:23,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:45:23,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:45:23,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:45:23,499 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:45:23,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 10:45:23,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:45:23,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:45:23,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 10:45:23,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:45:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:45:23,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 10:45:23,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841459176] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:45:23,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 10:45:23,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-01-28 10:45:23,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109227309] [2023-01-28 10:45:23,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:45:23,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 10:45:23,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:45:23,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 10:45:23,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-01-28 10:45:23,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 418 [2023-01-28 10:45:23,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 153 transitions, 1613 flow. Second operand has 7 states, 7 states have (on average 179.57142857142858) internal successors, (1257), 7 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:23,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:45:23,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 418 [2023-01-28 10:45:23,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:45:28,503 INFO L130 PetriNetUnfolder]: 33411/48113 cut-off events. [2023-01-28 10:45:28,504 INFO L131 PetriNetUnfolder]: For 198778/198778 co-relation queries the response was YES. [2023-01-28 10:45:28,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212332 conditions, 48113 events. 33411/48113 cut-off events. For 198778/198778 co-relation queries the response was YES. Maximal size of possible extension queue 1709. Compared 317835 event pairs, 5428 based on Foata normal form. 1036/49149 useless extension candidates. Maximal degree in co-relation 194249. Up to 13430 conditions per place. [2023-01-28 10:45:28,913 INFO L137 encePairwiseOnDemand]: 411/418 looper letters, 312 selfloop transitions, 142 changer transitions 8/462 dead transitions. [2023-01-28 10:45:28,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 462 transitions, 5526 flow [2023-01-28 10:45:28,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:45:28,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:45:28,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1549 transitions. [2023-01-28 10:45:28,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4632177033492823 [2023-01-28 10:45:28,916 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1549 transitions. [2023-01-28 10:45:28,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1549 transitions. [2023-01-28 10:45:28,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:45:28,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1549 transitions. [2023-01-28 10:45:28,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 193.625) internal successors, (1549), 8 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:28,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 418.0) internal successors, (3762), 9 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:28,923 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 418.0) internal successors, (3762), 9 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:28,923 INFO L175 Difference]: Start difference. First operand has 110 places, 153 transitions, 1613 flow. Second operand 8 states and 1549 transitions. [2023-01-28 10:45:28,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 462 transitions, 5526 flow [2023-01-28 10:45:30,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 462 transitions, 5369 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-01-28 10:45:30,805 INFO L231 Difference]: Finished difference. Result has 115 places, 244 transitions, 3144 flow [2023-01-28 10:45:30,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=1550, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3144, PETRI_PLACES=115, PETRI_TRANSITIONS=244} [2023-01-28 10:45:30,806 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2023-01-28 10:45:30,806 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 244 transitions, 3144 flow [2023-01-28 10:45:30,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 179.57142857142858) internal successors, (1257), 7 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:30,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:45:30,807 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] [2023-01-28 10:45:30,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-28 10:45:31,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:45:31,012 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)] === [2023-01-28 10:45:31,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:45:31,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1504821695, now seen corresponding path program 5 times [2023-01-28 10:45:31,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:45:31,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345238494] [2023-01-28 10:45:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:45:31,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:45:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:45:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:45:31,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:45:31,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345238494] [2023-01-28 10:45:31,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345238494] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:45:31,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:45:31,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-28 10:45:31,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953918346] [2023-01-28 10:45:31,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:45:31,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 10:45:31,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:45:31,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 10:45:31,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-01-28 10:45:31,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 418 [2023-01-28 10:45:31,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 244 transitions, 3144 flow. Second operand has 7 states, 7 states have (on average 178.57142857142858) internal successors, (1250), 7 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:31,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:45:31,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 418 [2023-01-28 10:45:31,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:45:37,512 INFO L130 PetriNetUnfolder]: 40835/59222 cut-off events. [2023-01-28 10:45:37,512 INFO L131 PetriNetUnfolder]: For 290174/290174 co-relation queries the response was YES. [2023-01-28 10:45:37,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280783 conditions, 59222 events. 40835/59222 cut-off events. For 290174/290174 co-relation queries the response was YES. Maximal size of possible extension queue 2188. Compared 408605 event pairs, 8054 based on Foata normal form. 370/59592 useless extension candidates. Maximal degree in co-relation 258842. Up to 27204 conditions per place. [2023-01-28 10:45:38,221 INFO L137 encePairwiseOnDemand]: 409/418 looper letters, 245 selfloop transitions, 218 changer transitions 59/522 dead transitions. [2023-01-28 10:45:38,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 522 transitions, 6619 flow [2023-01-28 10:45:38,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 10:45:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 10:45:38,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2129 transitions. [2023-01-28 10:45:38,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46302740321879077 [2023-01-28 10:45:38,225 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2129 transitions. [2023-01-28 10:45:38,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2129 transitions. [2023-01-28 10:45:38,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:45:38,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2129 transitions. [2023-01-28 10:45:38,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 193.54545454545453) internal successors, (2129), 11 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:38,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 418.0) internal successors, (5016), 12 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:38,232 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 418.0) internal successors, (5016), 12 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:38,232 INFO L175 Difference]: Start difference. First operand has 115 places, 244 transitions, 3144 flow. Second operand 11 states and 2129 transitions. [2023-01-28 10:45:38,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 522 transitions, 6619 flow [2023-01-28 10:45:40,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 522 transitions, 6380 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-01-28 10:45:40,608 INFO L231 Difference]: Finished difference. Result has 130 places, 317 transitions, 4806 flow [2023-01-28 10:45:40,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=3001, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4806, PETRI_PLACES=130, PETRI_TRANSITIONS=317} [2023-01-28 10:45:40,609 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2023-01-28 10:45:40,609 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 317 transitions, 4806 flow [2023-01-28 10:45:40,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 178.57142857142858) internal successors, (1250), 7 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:40,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:45:40,609 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] [2023-01-28 10:45:40,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 10:45:40,609 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)] === [2023-01-28 10:45:40,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:45:40,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1726133945, now seen corresponding path program 6 times [2023-01-28 10:45:40,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:45:40,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940020696] [2023-01-28 10:45:40,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:45:40,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:45:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:45:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:45:40,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:45:40,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940020696] [2023-01-28 10:45:40,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940020696] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:45:40,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:45:40,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:45:40,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323750911] [2023-01-28 10:45:40,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:45:40,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:45:40,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:45:40,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:45:40,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-28 10:45:40,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 418 [2023-01-28 10:45:40,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 317 transitions, 4806 flow. Second operand has 6 states, 6 states have (on average 183.33333333333334) internal successors, (1100), 6 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:40,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:45:40,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 418 [2023-01-28 10:45:40,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:45:49,584 INFO L130 PetriNetUnfolder]: 50689/73304 cut-off events. [2023-01-28 10:45:49,584 INFO L131 PetriNetUnfolder]: For 452056/452056 co-relation queries the response was YES. [2023-01-28 10:45:50,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375448 conditions, 73304 events. 50689/73304 cut-off events. For 452056/452056 co-relation queries the response was YES. Maximal size of possible extension queue 2688. Compared 516737 event pairs, 11772 based on Foata normal form. 428/73732 useless extension candidates. Maximal degree in co-relation 352711. Up to 34721 conditions per place. [2023-01-28 10:45:50,342 INFO L137 encePairwiseOnDemand]: 410/418 looper letters, 259 selfloop transitions, 289 changer transitions 17/565 dead transitions. [2023-01-28 10:45:50,343 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 565 transitions, 8425 flow [2023-01-28 10:45:50,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:45:50,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:45:50,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1595 transitions. [2023-01-28 10:45:50,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4769736842105263 [2023-01-28 10:45:50,345 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1595 transitions. [2023-01-28 10:45:50,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1595 transitions. [2023-01-28 10:45:50,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:45:50,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1595 transitions. [2023-01-28 10:45:50,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 199.375) internal successors, (1595), 8 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:50,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 418.0) internal successors, (3762), 9 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:50,351 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 418.0) internal successors, (3762), 9 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:50,351 INFO L175 Difference]: Start difference. First operand has 130 places, 317 transitions, 4806 flow. Second operand 8 states and 1595 transitions. [2023-01-28 10:45:50,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 565 transitions, 8425 flow [2023-01-28 10:45:56,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 565 transitions, 8381 flow, removed 22 selfloop flow, removed 2 redundant places. [2023-01-28 10:45:56,616 INFO L231 Difference]: Finished difference. Result has 138 places, 411 transitions, 7436 flow [2023-01-28 10:45:56,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=4772, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7436, PETRI_PLACES=138, PETRI_TRANSITIONS=411} [2023-01-28 10:45:56,617 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2023-01-28 10:45:56,617 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 411 transitions, 7436 flow [2023-01-28 10:45:56,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.33333333333334) internal successors, (1100), 6 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:56,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:45:56,617 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] [2023-01-28 10:45:56,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-01-28 10:45:56,617 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)] === [2023-01-28 10:45:56,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:45:56,617 INFO L85 PathProgramCache]: Analyzing trace with hash 218750575, now seen corresponding path program 7 times [2023-01-28 10:45:56,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:45:56,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460188770] [2023-01-28 10:45:56,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:45:56,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:45:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:45:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:45:56,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:45:56,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460188770] [2023-01-28 10:45:56,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460188770] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:45:56,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:45:56,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:45:56,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430707372] [2023-01-28 10:45:56,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:45:56,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:45:56,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:45:56,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:45:56,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-01-28 10:45:56,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 418 [2023-01-28 10:45:56,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 411 transitions, 7436 flow. Second operand has 6 states, 6 states have (on average 179.33333333333334) internal successors, (1076), 6 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:45:56,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:45:56,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 418 [2023-01-28 10:45:56,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:46:06,441 INFO L130 PetriNetUnfolder]: 53895/77102 cut-off events. [2023-01-28 10:46:06,442 INFO L131 PetriNetUnfolder]: For 538912/538912 co-relation queries the response was YES. [2023-01-28 10:46:07,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413945 conditions, 77102 events. 53895/77102 cut-off events. For 538912/538912 co-relation queries the response was YES. Maximal size of possible extension queue 2897. Compared 534721 event pairs, 11653 based on Foata normal form. 360/77462 useless extension candidates. Maximal degree in co-relation 385406. Up to 47672 conditions per place. [2023-01-28 10:46:07,274 INFO L137 encePairwiseOnDemand]: 409/418 looper letters, 301 selfloop transitions, 300 changer transitions 32/633 dead transitions. [2023-01-28 10:46:07,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 633 transitions, 10503 flow [2023-01-28 10:46:07,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 10:46:07,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 10:46:07,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1937 transitions. [2023-01-28 10:46:07,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46339712918660286 [2023-01-28 10:46:07,277 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1937 transitions. [2023-01-28 10:46:07,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1937 transitions. [2023-01-28 10:46:07,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:46:07,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1937 transitions. [2023-01-28 10:46:07,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 193.7) internal successors, (1937), 10 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:46:07,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 418.0) internal successors, (4598), 11 states have internal predecessors, (4598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:46:07,284 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 418.0) internal successors, (4598), 11 states have internal predecessors, (4598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:46:07,284 INFO L175 Difference]: Start difference. First operand has 138 places, 411 transitions, 7436 flow. Second operand 10 states and 1937 transitions. [2023-01-28 10:46:07,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 633 transitions, 10503 flow [2023-01-28 10:46:16,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 633 transitions, 10429 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-01-28 10:46:16,776 INFO L231 Difference]: Finished difference. Result has 151 places, 446 transitions, 8766 flow [2023-01-28 10:46:16,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=7381, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8766, PETRI_PLACES=151, PETRI_TRANSITIONS=446} [2023-01-28 10:46:16,776 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2023-01-28 10:46:16,776 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 446 transitions, 8766 flow [2023-01-28 10:46:16,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 179.33333333333334) internal successors, (1076), 6 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:46:16,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:46:16,777 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] [2023-01-28 10:46:16,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-28 10:46:16,777 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)] === [2023-01-28 10:46:16,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:46:16,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1306609249, now seen corresponding path program 8 times [2023-01-28 10:46:16,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:46:16,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623456895] [2023-01-28 10:46:16,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:46:16,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:46:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:46:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:46:17,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:46:17,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623456895] [2023-01-28 10:46:17,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623456895] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:46:17,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:46:17,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:46:17,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413797071] [2023-01-28 10:46:17,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:46:17,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:46:17,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:46:17,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:46:17,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-01-28 10:46:17,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 418 [2023-01-28 10:46:17,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 446 transitions, 8766 flow. Second operand has 6 states, 6 states have (on average 183.33333333333334) internal successors, (1100), 6 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:46:17,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:46:17,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 418 [2023-01-28 10:46:17,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:46:26,013 INFO L130 PetriNetUnfolder]: 53039/75758 cut-off events. [2023-01-28 10:46:26,014 INFO L131 PetriNetUnfolder]: For 654208/654208 co-relation queries the response was YES. [2023-01-28 10:46:26,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430689 conditions, 75758 events. 53039/75758 cut-off events. For 654208/654208 co-relation queries the response was YES. Maximal size of possible extension queue 2817. Compared 520535 event pairs, 14748 based on Foata normal form. 180/75938 useless extension candidates. Maximal degree in co-relation 397354. Up to 53139 conditions per place. [2023-01-28 10:46:27,321 INFO L137 encePairwiseOnDemand]: 411/418 looper letters, 233 selfloop transitions, 287 changer transitions 14/534 dead transitions. [2023-01-28 10:46:27,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 534 transitions, 10499 flow [2023-01-28 10:46:27,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 10:46:27,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 10:46:27,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1187 transitions. [2023-01-28 10:46:27,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732854864433812 [2023-01-28 10:46:27,323 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1187 transitions. [2023-01-28 10:46:27,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1187 transitions. [2023-01-28 10:46:27,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:46:27,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1187 transitions. [2023-01-28 10:46:27,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 197.83333333333334) internal successors, (1187), 6 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:46:27,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 418.0) internal successors, (2926), 7 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:46:27,327 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 418.0) internal successors, (2926), 7 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:46:27,328 INFO L175 Difference]: Start difference. First operand has 151 places, 446 transitions, 8766 flow. Second operand 6 states and 1187 transitions. [2023-01-28 10:46:27,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 534 transitions, 10499 flow [2023-01-28 10:46:43,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 534 transitions, 10302 flow, removed 37 selfloop flow, removed 2 redundant places. [2023-01-28 10:46:43,093 INFO L231 Difference]: Finished difference. Result has 156 places, 447 transitions, 9478 flow [2023-01-28 10:46:43,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=8554, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9478, PETRI_PLACES=156, PETRI_TRANSITIONS=447} [2023-01-28 10:46:43,094 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2023-01-28 10:46:43,094 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 447 transitions, 9478 flow [2023-01-28 10:46:43,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.33333333333334) internal successors, (1100), 6 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:46:43,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:46:43,094 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] [2023-01-28 10:46:43,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-01-28 10:46:43,094 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)] === [2023-01-28 10:46:43,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:46:43,095 INFO L85 PathProgramCache]: Analyzing trace with hash 787391019, now seen corresponding path program 9 times [2023-01-28 10:46:43,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:46:43,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119432569] [2023-01-28 10:46:43,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:46:43,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:46:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:46:43,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:46:43,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:46:43,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119432569] [2023-01-28 10:46:43,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119432569] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:46:43,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:46:43,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-28 10:46:43,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249451852] [2023-01-28 10:46:43,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:46:43,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 10:46:43,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:46:43,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 10:46:43,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-01-28 10:46:43,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 418 [2023-01-28 10:46:43,326 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 447 transitions, 9478 flow. Second operand has 7 states, 7 states have (on average 182.57142857142858) internal successors, (1278), 7 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:46:43,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:46:43,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 418 [2023-01-28 10:46:43,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:46:53,022 INFO L130 PetriNetUnfolder]: 49997/70532 cut-off events. [2023-01-28 10:46:53,022 INFO L131 PetriNetUnfolder]: For 625286/625286 co-relation queries the response was YES. [2023-01-28 10:46:53,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 409806 conditions, 70532 events. 49997/70532 cut-off events. For 625286/625286 co-relation queries the response was YES. Maximal size of possible extension queue 2571. Compared 465256 event pairs, 13766 based on Foata normal form. 716/71248 useless extension candidates. Maximal degree in co-relation 382650. Up to 50351 conditions per place. [2023-01-28 10:46:53,903 INFO L137 encePairwiseOnDemand]: 410/418 looper letters, 360 selfloop transitions, 175 changer transitions 4/539 dead transitions. [2023-01-28 10:46:53,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 539 transitions, 10799 flow [2023-01-28 10:46:53,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:46:53,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:46:53,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1373 transitions. [2023-01-28 10:46:53,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46924128503075874 [2023-01-28 10:46:53,905 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1373 transitions. [2023-01-28 10:46:53,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1373 transitions. [2023-01-28 10:46:53,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:46:53,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1373 transitions. [2023-01-28 10:46:53,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 196.14285714285714) internal successors, (1373), 7 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:46:53,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 418.0) internal successors, (3344), 8 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:46:53,909 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 418.0) internal successors, (3344), 8 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:46:53,909 INFO L175 Difference]: Start difference. First operand has 156 places, 447 transitions, 9478 flow. Second operand 7 states and 1373 transitions. [2023-01-28 10:46:53,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 539 transitions, 10799 flow [2023-01-28 10:47:03,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 539 transitions, 10499 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-01-28 10:47:03,937 INFO L231 Difference]: Finished difference. Result has 160 places, 430 transitions, 9100 flow [2023-01-28 10:47:03,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=8577, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9100, PETRI_PLACES=160, PETRI_TRANSITIONS=430} [2023-01-28 10:47:03,938 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2023-01-28 10:47:03,938 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 430 transitions, 9100 flow [2023-01-28 10:47:03,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 182.57142857142858) internal successors, (1278), 7 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:47:03,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:47:03,939 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] [2023-01-28 10:47:03,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-01-28 10:47:03,939 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)] === [2023-01-28 10:47:03,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:47:03,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1589570313, now seen corresponding path program 10 times [2023-01-28 10:47:03,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:47:03,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327977686] [2023-01-28 10:47:03,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:47:03,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:47:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:47:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:47:04,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:47:04,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327977686] [2023-01-28 10:47:04,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327977686] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:47:04,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:47:04,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:47:04,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361619601] [2023-01-28 10:47:04,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:47:04,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:47:04,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:47:04,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:47:04,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-28 10:47:04,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 418 [2023-01-28 10:47:04,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 430 transitions, 9100 flow. Second operand has 6 states, 6 states have (on average 183.33333333333334) internal successors, (1100), 6 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:47:04,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:47:04,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 418 [2023-01-28 10:47:04,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:47:14,056 INFO L130 PetriNetUnfolder]: 54524/76693 cut-off events. [2023-01-28 10:47:14,057 INFO L131 PetriNetUnfolder]: For 723390/723390 co-relation queries the response was YES. [2023-01-28 10:47:14,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451353 conditions, 76693 events. 54524/76693 cut-off events. For 723390/723390 co-relation queries the response was YES. Maximal size of possible extension queue 2839. Compared 509756 event pairs, 14406 based on Foata normal form. 716/77409 useless extension candidates. Maximal degree in co-relation 423692. Up to 54981 conditions per place. [2023-01-28 10:47:15,064 INFO L137 encePairwiseOnDemand]: 411/418 looper letters, 268 selfloop transitions, 338 changer transitions 1/607 dead transitions. [2023-01-28 10:47:15,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 607 transitions, 13083 flow [2023-01-28 10:47:15,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:47:15,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:47:15,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1376 transitions. [2023-01-28 10:47:15,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47026657552973344 [2023-01-28 10:47:15,066 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1376 transitions. [2023-01-28 10:47:15,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1376 transitions. [2023-01-28 10:47:15,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:47:15,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1376 transitions. [2023-01-28 10:47:15,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 196.57142857142858) internal successors, (1376), 7 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:47:15,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 418.0) internal successors, (3344), 8 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:47:15,070 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 418.0) internal successors, (3344), 8 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:47:15,070 INFO L175 Difference]: Start difference. First operand has 160 places, 430 transitions, 9100 flow. Second operand 7 states and 1376 transitions. [2023-01-28 10:47:15,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 607 transitions, 13083 flow [2023-01-28 10:47:28,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 607 transitions, 12701 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-01-28 10:47:28,182 INFO L231 Difference]: Finished difference. Result has 166 places, 505 transitions, 11676 flow [2023-01-28 10:47:28,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=8822, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11676, PETRI_PLACES=166, PETRI_TRANSITIONS=505} [2023-01-28 10:47:28,183 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2023-01-28 10:47:28,183 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 505 transitions, 11676 flow [2023-01-28 10:47:28,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.33333333333334) internal successors, (1100), 6 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:47:28,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:47:28,183 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] [2023-01-28 10:47:28,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-01-28 10:47:28,183 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)] === [2023-01-28 10:47:28,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:47:28,184 INFO L85 PathProgramCache]: Analyzing trace with hash 571752297, now seen corresponding path program 11 times [2023-01-28 10:47:28,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:47:28,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274864263] [2023-01-28 10:47:28,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:47:28,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:47:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:47:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:47:28,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:47:28,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274864263] [2023-01-28 10:47:28,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274864263] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:47:28,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:47:28,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:47:28,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491019091] [2023-01-28 10:47:28,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:47:28,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:47:28,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:47:28,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:47:28,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-01-28 10:47:28,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 418 [2023-01-28 10:47:28,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 505 transitions, 11676 flow. Second operand has 6 states, 6 states have (on average 183.33333333333334) internal successors, (1100), 6 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:47:28,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:47:28,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 418 [2023-01-28 10:47:28,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:47:39,370 INFO L130 PetriNetUnfolder]: 55186/77509 cut-off events. [2023-01-28 10:47:39,371 INFO L131 PetriNetUnfolder]: For 791506/791506 co-relation queries the response was YES. [2023-01-28 10:47:40,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470610 conditions, 77509 events. 55186/77509 cut-off events. For 791506/791506 co-relation queries the response was YES. Maximal size of possible extension queue 2872. Compared 513256 event pairs, 15250 based on Foata normal form. 624/78133 useless extension candidates. Maximal degree in co-relation 441055. Up to 58781 conditions per place. [2023-01-28 10:47:40,381 INFO L137 encePairwiseOnDemand]: 410/418 looper letters, 225 selfloop transitions, 388 changer transitions 5/618 dead transitions. [2023-01-28 10:47:40,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 618 transitions, 14634 flow [2023-01-28 10:47:40,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 10:47:40,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 10:47:40,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1175 transitions. [2023-01-28 10:47:40,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46850079744816586 [2023-01-28 10:47:40,383 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1175 transitions. [2023-01-28 10:47:40,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1175 transitions. [2023-01-28 10:47:40,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:47:40,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1175 transitions. [2023-01-28 10:47:40,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 195.83333333333334) internal successors, (1175), 6 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:47:40,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 418.0) internal successors, (2926), 7 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:47:40,386 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 418.0) internal successors, (2926), 7 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:47:40,386 INFO L175 Difference]: Start difference. First operand has 166 places, 505 transitions, 11676 flow. Second operand 6 states and 1175 transitions. [2023-01-28 10:47:40,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 618 transitions, 14634 flow [2023-01-28 10:47:54,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 618 transitions, 14106 flow, removed 19 selfloop flow, removed 3 redundant places. [2023-01-28 10:47:54,401 INFO L231 Difference]: Finished difference. Result has 170 places, 553 transitions, 13543 flow [2023-01-28 10:47:54,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=10791, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13543, PETRI_PLACES=170, PETRI_TRANSITIONS=553} [2023-01-28 10:47:54,402 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2023-01-28 10:47:54,402 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 553 transitions, 13543 flow [2023-01-28 10:47:54,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.33333333333334) internal successors, (1100), 6 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:47:54,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:47:54,402 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] [2023-01-28 10:47:54,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-01-28 10:47:54,402 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)] === [2023-01-28 10:47:54,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:47:54,403 INFO L85 PathProgramCache]: Analyzing trace with hash -2050580217, now seen corresponding path program 12 times [2023-01-28 10:47:54,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:47:54,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471004928] [2023-01-28 10:47:54,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:47:54,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:47:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:47:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:47:54,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:47:54,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471004928] [2023-01-28 10:47:54,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471004928] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:47:54,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608289140] [2023-01-28 10:47:54,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:47:54,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:47:54,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:47:54,582 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:47:54,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 10:47:54,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 10:47:54,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:47:54,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 10:47:54,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:47:54,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:47:54,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:47:55,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:47:55,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608289140] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:47:55,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:47:55,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 8] total 17 [2023-01-28 10:47:55,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716313456] [2023-01-28 10:47:55,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:47:55,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 10:47:55,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:47:55,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 10:47:55,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-01-28 10:47:55,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 418 [2023-01-28 10:47:55,024 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 553 transitions, 13543 flow. Second operand has 18 states, 18 states have (on average 180.11111111111111) internal successors, (3242), 18 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:47:55,024 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:47:55,024 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 418 [2023-01-28 10:47:55,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:48:09,895 INFO L130 PetriNetUnfolder]: 66530/94579 cut-off events. [2023-01-28 10:48:09,895 INFO L131 PetriNetUnfolder]: For 941085/941085 co-relation queries the response was YES. [2023-01-28 10:48:11,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 561528 conditions, 94579 events. 66530/94579 cut-off events. For 941085/941085 co-relation queries the response was YES. Maximal size of possible extension queue 3616. Compared 660512 event pairs, 6484 based on Foata normal form. 2940/97519 useless extension candidates. Maximal degree in co-relation 538838. Up to 24972 conditions per place. [2023-01-28 10:48:11,378 INFO L137 encePairwiseOnDemand]: 405/418 looper letters, 1287 selfloop transitions, 437 changer transitions 60/1784 dead transitions. [2023-01-28 10:48:11,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 1784 transitions, 38637 flow [2023-01-28 10:48:11,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 10:48:11,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 10:48:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 6032 transitions. [2023-01-28 10:48:11,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45095693779904306 [2023-01-28 10:48:11,382 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 6032 transitions. [2023-01-28 10:48:11,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 6032 transitions. [2023-01-28 10:48:11,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:48:11,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 6032 transitions. [2023-01-28 10:48:11,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 188.5) internal successors, (6032), 32 states have internal predecessors, (6032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:48:11,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 418.0) internal successors, (13794), 33 states have internal predecessors, (13794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:48:11,394 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 418.0) internal successors, (13794), 33 states have internal predecessors, (13794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:48:11,394 INFO L175 Difference]: Start difference. First operand has 170 places, 553 transitions, 13543 flow. Second operand 32 states and 6032 transitions. [2023-01-28 10:48:11,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 1784 transitions, 38637 flow [2023-01-28 10:48:29,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 1784 transitions, 37022 flow, removed 130 selfloop flow, removed 5 redundant places. [2023-01-28 10:48:29,414 INFO L231 Difference]: Finished difference. Result has 205 places, 849 transitions, 19586 flow [2023-01-28 10:48:29,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=12109, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=19586, PETRI_PLACES=205, PETRI_TRANSITIONS=849} [2023-01-28 10:48:29,414 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2023-01-28 10:48:29,414 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 849 transitions, 19586 flow [2023-01-28 10:48:29,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 180.11111111111111) internal successors, (3242), 18 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:48:29,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:48:29,415 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] [2023-01-28 10:48:29,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 10:48:29,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:48:29,615 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)] === [2023-01-28 10:48:29,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:48:29,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1378408297, now seen corresponding path program 3 times [2023-01-28 10:48:29,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:48:29,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83814767] [2023-01-28 10:48:29,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:48:29,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:48:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:48:29,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:48:29,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:48:29,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83814767] [2023-01-28 10:48:29,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83814767] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:48:29,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045257787] [2023-01-28 10:48:29,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:48:29,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:48:29,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:48:29,814 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:48:29,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 10:48:29,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:48:29,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:48:29,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 10:48:29,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:48:30,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:48:30,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 10:48:30,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045257787] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:48:30,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 10:48:30,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2023-01-28 10:48:30,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018554547] [2023-01-28 10:48:30,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:48:30,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:48:30,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:48:30,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:48:30,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-01-28 10:48:30,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 418 [2023-01-28 10:48:30,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 849 transitions, 19586 flow. Second operand has 6 states, 6 states have (on average 183.33333333333334) internal successors, (1100), 6 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:48:30,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:48:30,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 418 [2023-01-28 10:48:30,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:48:46,950 INFO L130 PetriNetUnfolder]: 68026/96007 cut-off events. [2023-01-28 10:48:46,950 INFO L131 PetriNetUnfolder]: For 1243860/1243860 co-relation queries the response was YES. [2023-01-28 10:48:48,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642885 conditions, 96007 events. 68026/96007 cut-off events. For 1243860/1243860 co-relation queries the response was YES. Maximal size of possible extension queue 3817. Compared 669459 event pairs, 8556 based on Foata normal form. 124/96131 useless extension candidates. Maximal degree in co-relation 642784. Up to 28347 conditions per place. [2023-01-28 10:48:48,515 INFO L137 encePairwiseOnDemand]: 410/418 looper letters, 643 selfloop transitions, 533 changer transitions 6/1182 dead transitions. [2023-01-28 10:48:48,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 1182 transitions, 25641 flow [2023-01-28 10:48:48,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:48:48,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:48:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1587 transitions. [2023-01-28 10:48:48,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47458133971291866 [2023-01-28 10:48:48,517 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1587 transitions. [2023-01-28 10:48:48,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1587 transitions. [2023-01-28 10:48:48,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:48:48,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1587 transitions. [2023-01-28 10:48:48,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 198.375) internal successors, (1587), 8 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:48:48,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 418.0) internal successors, (3762), 9 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:48:48,520 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 418.0) internal successors, (3762), 9 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:48:48,520 INFO L175 Difference]: Start difference. First operand has 205 places, 849 transitions, 19586 flow. Second operand 8 states and 1587 transitions. [2023-01-28 10:48:48,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 1182 transitions, 25641 flow [2023-01-28 10:49:19,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 1182 transitions, 24676 flow, removed 238 selfloop flow, removed 8 redundant places. [2023-01-28 10:49:19,038 INFO L231 Difference]: Finished difference. Result has 204 places, 937 transitions, 21536 flow [2023-01-28 10:49:19,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=18759, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=446, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=21536, PETRI_PLACES=204, PETRI_TRANSITIONS=937} [2023-01-28 10:49:19,038 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2023-01-28 10:49:19,038 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 937 transitions, 21536 flow [2023-01-28 10:49:19,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 183.33333333333334) internal successors, (1100), 6 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:49:19,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:49:19,039 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] [2023-01-28 10:49:19,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 10:49:19,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:49:19,240 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)] === [2023-01-28 10:49:19,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:49:19,240 INFO L85 PathProgramCache]: Analyzing trace with hash -243315741, now seen corresponding path program 4 times [2023-01-28 10:49:19,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:49:19,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147360975] [2023-01-28 10:49:19,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:49:19,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:49:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:49:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:49:19,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:49:19,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147360975] [2023-01-28 10:49:19,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147360975] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:49:19,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:49:19,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-28 10:49:19,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361319209] [2023-01-28 10:49:19,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:49:19,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 10:49:19,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:49:19,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 10:49:19,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-01-28 10:49:19,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 418 [2023-01-28 10:49:19,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 937 transitions, 21536 flow. Second operand has 7 states, 7 states have (on average 182.57142857142858) internal successors, (1278), 7 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:49:19,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:49:19,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 418 [2023-01-28 10:49:19,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:49:36,947 INFO L130 PetriNetUnfolder]: 67128/94793 cut-off events. [2023-01-28 10:49:36,947 INFO L131 PetriNetUnfolder]: For 1248441/1248441 co-relation queries the response was YES. [2023-01-28 10:49:38,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632075 conditions, 94793 events. 67128/94793 cut-off events. For 1248441/1248441 co-relation queries the response was YES. Maximal size of possible extension queue 3912. Compared 655553 event pairs, 20969 based on Foata normal form. 316/95109 useless extension candidates. Maximal degree in co-relation 631994. Up to 82840 conditions per place. [2023-01-28 10:49:38,513 INFO L137 encePairwiseOnDemand]: 410/418 looper letters, 486 selfloop transitions, 547 changer transitions 5/1038 dead transitions. [2023-01-28 10:49:38,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 1038 transitions, 24553 flow [2023-01-28 10:49:38,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 10:49:38,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 10:49:38,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1177 transitions. [2023-01-28 10:49:38,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4692982456140351 [2023-01-28 10:49:38,515 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1177 transitions. [2023-01-28 10:49:38,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1177 transitions. [2023-01-28 10:49:38,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:49:38,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1177 transitions. [2023-01-28 10:49:38,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 196.16666666666666) internal successors, (1177), 6 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:49:38,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 418.0) internal successors, (2926), 7 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:49:38,517 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 418.0) internal successors, (2926), 7 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:49:38,517 INFO L175 Difference]: Start difference. First operand has 204 places, 937 transitions, 21536 flow. Second operand 6 states and 1177 transitions. [2023-01-28 10:49:38,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 1038 transitions, 24553 flow [2023-01-28 10:50:07,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 1038 transitions, 24437 flow, removed 46 selfloop flow, removed 2 redundant places. [2023-01-28 10:50:07,236 INFO L231 Difference]: Finished difference. Result has 208 places, 941 transitions, 22651 flow [2023-01-28 10:50:07,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=20565, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=515, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=22651, PETRI_PLACES=208, PETRI_TRANSITIONS=941} [2023-01-28 10:50:07,237 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2023-01-28 10:50:07,237 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 941 transitions, 22651 flow [2023-01-28 10:50:07,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 182.57142857142858) internal successors, (1278), 7 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:50:07,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:50:07,238 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] [2023-01-28 10:50:07,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-01-28 10:50:07,238 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)] === [2023-01-28 10:50:07,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:50:07,238 INFO L85 PathProgramCache]: Analyzing trace with hash -660345593, now seen corresponding path program 5 times [2023-01-28 10:50:07,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:50:07,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893645235] [2023-01-28 10:50:07,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:50:07,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:50:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:50:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:50:07,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:50:07,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893645235] [2023-01-28 10:50:07,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893645235] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:50:07,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:50:07,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-28 10:50:07,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123617840] [2023-01-28 10:50:07,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:50:07,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 10:50:07,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:50:07,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 10:50:07,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-01-28 10:50:07,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 418 [2023-01-28 10:50:07,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 941 transitions, 22651 flow. Second operand has 7 states, 7 states have (on average 182.57142857142858) internal successors, (1278), 7 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:50:07,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:50:07,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 418 [2023-01-28 10:50:07,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:50:29,304 INFO L130 PetriNetUnfolder]: 83989/118170 cut-off events. [2023-01-28 10:50:29,304 INFO L131 PetriNetUnfolder]: For 1477666/1477666 co-relation queries the response was YES. [2023-01-28 10:50:30,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 774959 conditions, 118170 events. 83989/118170 cut-off events. For 1477666/1477666 co-relation queries the response was YES. Maximal size of possible extension queue 5035. Compared 837181 event pairs, 24249 based on Foata normal form. 1592/119761 useless extension candidates. Maximal degree in co-relation 774860. Up to 79533 conditions per place. [2023-01-28 10:50:31,292 INFO L137 encePairwiseOnDemand]: 410/418 looper letters, 506 selfloop transitions, 673 changer transitions 5/1184 dead transitions. [2023-01-28 10:50:31,292 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 1184 transitions, 27893 flow [2023-01-28 10:50:31,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:50:31,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:50:31,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1568 transitions. [2023-01-28 10:50:31,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4688995215311005 [2023-01-28 10:50:31,294 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1568 transitions. [2023-01-28 10:50:31,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1568 transitions. [2023-01-28 10:50:31,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:50:31,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1568 transitions. [2023-01-28 10:50:31,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 196.0) internal successors, (1568), 8 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:50:31,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 418.0) internal successors, (3762), 9 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:50:31,297 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 418.0) internal successors, (3762), 9 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:50:31,297 INFO L175 Difference]: Start difference. First operand has 208 places, 941 transitions, 22651 flow. Second operand 8 states and 1568 transitions. [2023-01-28 10:50:31,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 1184 transitions, 27893 flow [2023-01-28 10:51:03,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 1184 transitions, 27029 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-01-28 10:51:03,422 INFO L231 Difference]: Finished difference. Result has 213 places, 1019 transitions, 24910 flow [2023-01-28 10:51:03,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=21787, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=941, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=595, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=24910, PETRI_PLACES=213, PETRI_TRANSITIONS=1019} [2023-01-28 10:51:03,423 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2023-01-28 10:51:03,423 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 1019 transitions, 24910 flow [2023-01-28 10:51:03,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 182.57142857142858) internal successors, (1278), 7 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:51:03,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:51:03,423 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] [2023-01-28 10:51:03,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-01-28 10:51:03,424 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)] === [2023-01-28 10:51:03,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:51:03,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1147230129, now seen corresponding path program 6 times [2023-01-28 10:51:03,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:51:03,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598552114] [2023-01-28 10:51:03,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:51:03,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:51:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:51:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:51:03,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:51:03,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598552114] [2023-01-28 10:51:03,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598552114] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:51:03,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:51:03,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:51:03,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288527988] [2023-01-28 10:51:03,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:51:03,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:51:03,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:51:03,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:51:03,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-01-28 10:51:03,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 418 [2023-01-28 10:51:03,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 1019 transitions, 24910 flow. Second operand has 6 states, 6 states have (on average 183.33333333333334) internal successors, (1100), 6 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:51:03,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:51:03,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 418 [2023-01-28 10:51:03,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand