/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 04:50:03,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 04:50:03,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 04:50:03,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 04:50:03,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 04:50:03,697 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 04:50:03,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 04:50:03,702 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 04:50:03,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 04:50:03,707 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 04:50:03,708 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 04:50:03,709 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 04:50:03,709 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 04:50:03,711 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 04:50:03,711 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 04:50:03,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 04:50:03,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 04:50:03,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 04:50:03,714 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 04:50:03,718 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 04:50:03,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 04:50:03,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 04:50:03,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 04:50:03,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 04:50:03,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 04:50:03,726 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 04:50:03,726 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 04:50:03,727 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 04:50:03,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 04:50:03,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 04:50:03,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 04:50:03,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 04:50:03,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 04:50:03,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 04:50:03,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 04:50:03,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 04:50:03,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 04:50:03,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 04:50:03,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 04:50:03,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 04:50:03,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 04:50:03,733 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 04:50:03,753 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 04:50:03,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 04:50:03,754 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 04:50:03,754 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 04:50:03,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 04:50:03,755 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 04:50:03,755 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 04:50:03,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 04:50:03,755 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 04:50:03,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 04:50:03,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 04:50:03,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 04:50:03,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 04:50:03,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 04:50:03,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 04:50:03,756 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 04:50:03,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 04:50:03,756 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 04:50:03,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 04:50:03,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 04:50:03,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 04:50:03,757 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 04:50:03,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 04:50:03,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 04:50:03,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 04:50:03,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 04:50:03,757 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 04:50:03,757 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 04:50:03,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 04:50:03,758 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 04:50:03,758 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 04:50:03,758 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 04:50:03,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 04:50:03,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 04:50:03,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 04:50:03,935 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 04:50:03,935 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 04:50:03,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-01-28 04:50:04,962 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 04:50:05,129 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 04:50:05,129 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-01-28 04:50:05,133 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fde7d6037/4dfbab85993448388766d5931f10d2e7/FLAGbac76e975 [2023-01-28 04:50:05,144 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fde7d6037/4dfbab85993448388766d5931f10d2e7 [2023-01-28 04:50:05,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 04:50:05,147 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 04:50:05,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 04:50:05,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 04:50:05,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 04:50:05,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 04:50:05" (1/1) ... [2023-01-28 04:50:05,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a56f0d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:50:05, skipping insertion in model container [2023-01-28 04:50:05,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 04:50:05" (1/1) ... [2023-01-28 04:50:05,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 04:50:05,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 04:50:05,259 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-nonblocking-counter-alt2.wvr.c[2147,2160] [2023-01-28 04:50:05,262 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 04:50:05,267 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 04:50:05,278 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-nonblocking-counter-alt2.wvr.c[2147,2160] [2023-01-28 04:50:05,279 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 04:50:05,283 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 04:50:05,283 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 04:50:05,288 INFO L208 MainTranslator]: Completed translation [2023-01-28 04:50:05,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:50:05 WrapperNode [2023-01-28 04:50:05,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 04:50:05,289 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 04:50:05,289 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 04:50:05,289 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 04:50:05,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:50:05" (1/1) ... [2023-01-28 04:50:05,298 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:50:05" (1/1) ... [2023-01-28 04:50:05,309 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2023-01-28 04:50:05,309 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 04:50:05,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 04:50:05,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 04:50:05,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 04:50:05,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:50:05" (1/1) ... [2023-01-28 04:50:05,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:50:05" (1/1) ... [2023-01-28 04:50:05,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:50:05" (1/1) ... [2023-01-28 04:50:05,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:50:05" (1/1) ... [2023-01-28 04:50:05,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:50:05" (1/1) ... [2023-01-28 04:50:05,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:50:05" (1/1) ... [2023-01-28 04:50:05,321 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:50:05" (1/1) ... [2023-01-28 04:50:05,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:50:05" (1/1) ... [2023-01-28 04:50:05,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 04:50:05,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 04:50:05,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 04:50:05,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 04:50:05,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:50:05" (1/1) ... [2023-01-28 04:50:05,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 04:50:05,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:50:05,362 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 04:50:05,367 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 04:50:05,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 04:50:05,386 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 04:50:05,386 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 04:50:05,386 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 04:50:05,386 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 04:50:05,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 04:50:05,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 04:50:05,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 04:50:05,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 04:50:05,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 04:50:05,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 04:50:05,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 04:50:05,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 04:50:05,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 04:50:05,387 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 04:50:05,448 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 04:50:05,449 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 04:50:05,606 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 04:50:05,644 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 04:50:05,644 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-28 04:50:05,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 04:50:05 BoogieIcfgContainer [2023-01-28 04:50:05,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 04:50:05,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 04:50:05,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 04:50:05,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 04:50:05,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 04:50:05" (1/3) ... [2023-01-28 04:50:05,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a6da1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 04:50:05, skipping insertion in model container [2023-01-28 04:50:05,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:50:05" (2/3) ... [2023-01-28 04:50:05,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a6da1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 04:50:05, skipping insertion in model container [2023-01-28 04:50:05,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 04:50:05" (3/3) ... [2023-01-28 04:50:05,659 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2023-01-28 04:50:05,670 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 04:50:05,671 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 04:50:05,671 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 04:50:05,731 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 04:50:05,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 79 transitions, 174 flow [2023-01-28 04:50:05,785 INFO L130 PetriNetUnfolder]: 6/77 cut-off events. [2023-01-28 04:50:05,785 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 04:50:05,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 77 events. 6/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-01-28 04:50:05,788 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 79 transitions, 174 flow [2023-01-28 04:50:05,791 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 69 transitions, 150 flow [2023-01-28 04:50:05,793 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 04:50:05,798 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 69 transitions, 150 flow [2023-01-28 04:50:05,800 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 69 transitions, 150 flow [2023-01-28 04:50:05,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 69 transitions, 150 flow [2023-01-28 04:50:05,815 INFO L130 PetriNetUnfolder]: 6/69 cut-off events. [2023-01-28 04:50:05,815 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 04:50:05,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 69 events. 6/69 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 38 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-01-28 04:50:05,816 INFO L119 LiptonReduction]: Number of co-enabled transitions 404 [2023-01-28 04:50:07,362 INFO L134 LiptonReduction]: Checked pairs total: 443 [2023-01-28 04:50:07,363 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-01-28 04:50:07,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 04:50:07,395 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;@754cdcbf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 04:50:07,395 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 04:50:07,420 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-01-28 04:50:07,421 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 04:50:07,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:50:07,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:50:07,423 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:50:07,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:50:07,429 INFO L85 PathProgramCache]: Analyzing trace with hash 715998182, now seen corresponding path program 1 times [2023-01-28 04:50:07,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:50:07,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786337842] [2023-01-28 04:50:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:50:07,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:50:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:50:07,837 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 04:50:07,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:50:07,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786337842] [2023-01-28 04:50:07,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786337842] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:50:07,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:50:07,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 04:50:07,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390850229] [2023-01-28 04:50:07,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:50:07,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 04:50:07,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:50:07,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 04:50:07,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 04:50:07,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 142 [2023-01-28 04:50:07,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:07,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:50:07,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 142 [2023-01-28 04:50:07,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:50:07,941 INFO L130 PetriNetUnfolder]: 59/100 cut-off events. [2023-01-28 04:50:07,942 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-01-28 04:50:07,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 100 events. 59/100 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 240 event pairs, 23 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 165. Up to 78 conditions per place. [2023-01-28 04:50:07,946 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-01-28 04:50:07,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2023-01-28 04:50:07,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 04:50:07,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 04:50:07,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 265 transitions. [2023-01-28 04:50:07,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4665492957746479 [2023-01-28 04:50:07,960 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 265 transitions. [2023-01-28 04:50:07,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 265 transitions. [2023-01-28 04:50:07,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:50:07,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 265 transitions. [2023-01-28 04:50:07,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:07,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:07,970 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:07,971 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 265 transitions. [2023-01-28 04:50:07,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2023-01-28 04:50:07,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 04:50:07,974 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-01-28 04:50:07,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-01-28 04:50:07,977 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-01-28 04:50:07,977 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-01-28 04:50:07,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:07,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:50:07,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:50:07,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 04:50:07,978 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:50:07,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:50:07,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1517791802, now seen corresponding path program 1 times [2023-01-28 04:50:07,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:50:07,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691598119] [2023-01-28 04:50:07,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:50:07,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:50:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:50:08,066 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 04:50:08,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:50:08,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691598119] [2023-01-28 04:50:08,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691598119] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:50:08,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:50:08,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 04:50:08,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716980847] [2023-01-28 04:50:08,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:50:08,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 04:50:08,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:50:08,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 04:50:08,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 04:50:08,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 142 [2023-01-28 04:50:08,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:08,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:50:08,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 142 [2023-01-28 04:50:08,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:50:08,131 INFO L130 PetriNetUnfolder]: 60/119 cut-off events. [2023-01-28 04:50:08,132 INFO L131 PetriNetUnfolder]: For 22/30 co-relation queries the response was YES. [2023-01-28 04:50:08,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 119 events. 60/119 cut-off events. For 22/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 345 event pairs, 16 based on Foata normal form. 12/102 useless extension candidates. Maximal degree in co-relation 97. Up to 74 conditions per place. [2023-01-28 04:50:08,133 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 26 selfloop transitions, 3 changer transitions 2/32 dead transitions. [2023-01-28 04:50:08,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 32 transitions, 155 flow [2023-01-28 04:50:08,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 04:50:08,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 04:50:08,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 266 transitions. [2023-01-28 04:50:08,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46830985915492956 [2023-01-28 04:50:08,135 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 266 transitions. [2023-01-28 04:50:08,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 266 transitions. [2023-01-28 04:50:08,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:50:08,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 266 transitions. [2023-01-28 04:50:08,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:08,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:08,139 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:08,139 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 4 states and 266 transitions. [2023-01-28 04:50:08,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 32 transitions, 155 flow [2023-01-28 04:50:08,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 32 transitions, 146 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-01-28 04:50:08,140 INFO L231 Difference]: Finished difference. Result has 23 places, 18 transitions, 64 flow [2023-01-28 04:50:08,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=23, PETRI_TRANSITIONS=18} [2023-01-28 04:50:08,140 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-01-28 04:50:08,141 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 18 transitions, 64 flow [2023-01-28 04:50:08,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:08,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:50:08,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:50:08,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 04:50:08,141 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:50:08,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:50:08,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1749521210, now seen corresponding path program 2 times [2023-01-28 04:50:08,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:50:08,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777476353] [2023-01-28 04:50:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:50:08,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:50:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:50:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:08,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:50:08,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777476353] [2023-01-28 04:50:08,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777476353] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:50:08,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110846559] [2023-01-28 04:50:08,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:50:08,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:50:08,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:50:08,290 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 04:50:08,292 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 04:50:08,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-28 04:50:08,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:50:08,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:50:08,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:50:08,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:50:08,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 04:50:08,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110846559] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:50:08,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 04:50:08,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-01-28 04:50:08,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799134606] [2023-01-28 04:50:08,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:50:08,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 04:50:08,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:50:08,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 04:50:08,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-01-28 04:50:08,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 142 [2023-01-28 04:50:08,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:08,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:50:08,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 142 [2023-01-28 04:50:08,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:50:08,509 INFO L130 PetriNetUnfolder]: 51/94 cut-off events. [2023-01-28 04:50:08,509 INFO L131 PetriNetUnfolder]: For 72/80 co-relation queries the response was YES. [2023-01-28 04:50:08,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 94 events. 51/94 cut-off events. For 72/80 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 227 event pairs, 24 based on Foata normal form. 16/99 useless extension candidates. Maximal degree in co-relation 148. Up to 73 conditions per place. [2023-01-28 04:50:08,510 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-01-28 04:50:08,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 123 flow [2023-01-28 04:50:08,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 04:50:08,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 04:50:08,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 257 transitions. [2023-01-28 04:50:08,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524647887323944 [2023-01-28 04:50:08,511 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 257 transitions. [2023-01-28 04:50:08,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 257 transitions. [2023-01-28 04:50:08,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:50:08,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 257 transitions. [2023-01-28 04:50:08,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:08,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:08,513 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:08,513 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 64 flow. Second operand 4 states and 257 transitions. [2023-01-28 04:50:08,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 123 flow [2023-01-28 04:50:08,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 23 transitions, 111 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-01-28 04:50:08,514 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 56 flow [2023-01-28 04:50:08,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-01-28 04:50:08,515 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-01-28 04:50:08,515 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 56 flow [2023-01-28 04:50:08,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:08,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:50:08,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:50:08,526 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 04:50:08,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:50:08,716 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:50:08,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:50:08,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1434294769, now seen corresponding path program 1 times [2023-01-28 04:50:08,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:50:08,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560564948] [2023-01-28 04:50:08,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:50:08,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:50:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:50:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:08,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:50:08,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560564948] [2023-01-28 04:50:08,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560564948] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:50:08,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253608131] [2023-01-28 04:50:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:50:08,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:50:08,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:50:08,971 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 04:50:08,998 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 04:50:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:50:09,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 04:50:09,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:50:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:09,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:50:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:09,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253608131] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 04:50:09,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 04:50:09,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 10 [2023-01-28 04:50:09,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372617909] [2023-01-28 04:50:09,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:50:09,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 04:50:09,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:50:09,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 04:50:09,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-01-28 04:50:09,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 142 [2023-01-28 04:50:09,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 61.8) internal successors, (309), 5 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:09,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:50:09,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 142 [2023-01-28 04:50:09,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:50:09,330 INFO L130 PetriNetUnfolder]: 95/175 cut-off events. [2023-01-28 04:50:09,330 INFO L131 PetriNetUnfolder]: For 50/61 co-relation queries the response was YES. [2023-01-28 04:50:09,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 175 events. 95/175 cut-off events. For 50/61 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 560 event pairs, 15 based on Foata normal form. 12/143 useless extension candidates. Maximal degree in co-relation 144. Up to 69 conditions per place. [2023-01-28 04:50:09,331 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 29 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2023-01-28 04:50:09,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 40 transitions, 202 flow [2023-01-28 04:50:09,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 04:50:09,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 04:50:09,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 272 transitions. [2023-01-28 04:50:09,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4788732394366197 [2023-01-28 04:50:09,332 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 272 transitions. [2023-01-28 04:50:09,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 272 transitions. [2023-01-28 04:50:09,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:50:09,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 272 transitions. [2023-01-28 04:50:09,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:09,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:09,334 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:09,334 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 56 flow. Second operand 4 states and 272 transitions. [2023-01-28 04:50:09,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 40 transitions, 202 flow [2023-01-28 04:50:09,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 196 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 04:50:09,335 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 94 flow [2023-01-28 04:50:09,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-01-28 04:50:09,336 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-01-28 04:50:09,336 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 94 flow [2023-01-28 04:50:09,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.8) internal successors, (309), 5 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:09,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:50:09,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:50:09,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 04:50:09,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-01-28 04:50:09,542 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:50:09,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:50:09,542 INFO L85 PathProgramCache]: Analyzing trace with hash -539686553, now seen corresponding path program 2 times [2023-01-28 04:50:09,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:50:09,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874874888] [2023-01-28 04:50:09,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:50:09,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:50:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:50:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:50:09,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:50:09,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874874888] [2023-01-28 04:50:09,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874874888] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:50:09,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698168472] [2023-01-28 04:50:09,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:50:09,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:50:09,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:50:09,671 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 04:50:09,707 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 04:50:09,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:50:09,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:50:09,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:50:09,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:50:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:50:09,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:50:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:10,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698168472] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:50:10,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:50:10,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 12 [2023-01-28 04:50:10,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10683851] [2023-01-28 04:50:10,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:50:10,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 04:50:10,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:50:10,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 04:50:10,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-01-28 04:50:10,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 142 [2023-01-28 04:50:10,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 94 flow. Second operand has 13 states, 13 states have (on average 57.46153846153846) internal successors, (747), 13 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:10,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:50:10,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 142 [2023-01-28 04:50:10,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:50:10,421 INFO L130 PetriNetUnfolder]: 175/307 cut-off events. [2023-01-28 04:50:10,421 INFO L131 PetriNetUnfolder]: For 266/266 co-relation queries the response was YES. [2023-01-28 04:50:10,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 983 conditions, 307 events. 175/307 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1043 event pairs, 10 based on Foata normal form. 22/329 useless extension candidates. Maximal degree in co-relation 316. Up to 131 conditions per place. [2023-01-28 04:50:10,424 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 47 selfloop transitions, 32 changer transitions 4/83 dead transitions. [2023-01-28 04:50:10,424 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 83 transitions, 526 flow [2023-01-28 04:50:10,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 04:50:10,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 04:50:10,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 894 transitions. [2023-01-28 04:50:10,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197183098591549 [2023-01-28 04:50:10,426 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 894 transitions. [2023-01-28 04:50:10,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 894 transitions. [2023-01-28 04:50:10,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:50:10,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 894 transitions. [2023-01-28 04:50:10,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 59.6) internal successors, (894), 15 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:10,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 142.0) internal successors, (2272), 16 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:10,431 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 142.0) internal successors, (2272), 16 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:10,431 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 94 flow. Second operand 15 states and 894 transitions. [2023-01-28 04:50:10,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 83 transitions, 526 flow [2023-01-28 04:50:10,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 83 transitions, 526 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 04:50:10,436 INFO L231 Difference]: Finished difference. Result has 46 places, 48 transitions, 364 flow [2023-01-28 04:50:10,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=364, PETRI_PLACES=46, PETRI_TRANSITIONS=48} [2023-01-28 04:50:10,437 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 26 predicate places. [2023-01-28 04:50:10,437 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 48 transitions, 364 flow [2023-01-28 04:50:10,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 57.46153846153846) internal successors, (747), 13 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:10,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:50:10,438 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:50:10,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 04:50:10,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:50:10,643 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:50:10,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:50:10,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1477368276, now seen corresponding path program 3 times [2023-01-28 04:50:10,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:50:10,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367214690] [2023-01-28 04:50:10,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:50:10,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:50:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:50:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:10,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:50:10,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367214690] [2023-01-28 04:50:10,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367214690] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:50:10,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010487575] [2023-01-28 04:50:10,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:50:10,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:50:10,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:50:10,821 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 04:50:10,847 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 04:50:10,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:50:10,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:50:10,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 04:50:10,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:50:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:10,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:50:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:11,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010487575] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:50:11,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:50:11,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-01-28 04:50:11,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320296209] [2023-01-28 04:50:11,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:50:11,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 04:50:11,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:50:11,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 04:50:11,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-01-28 04:50:11,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 142 [2023-01-28 04:50:11,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 364 flow. Second operand has 14 states, 14 states have (on average 57.285714285714285) internal successors, (802), 14 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:11,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:50:11,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 142 [2023-01-28 04:50:11,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:50:11,574 INFO L130 PetriNetUnfolder]: 313/565 cut-off events. [2023-01-28 04:50:11,574 INFO L131 PetriNetUnfolder]: For 2250/2250 co-relation queries the response was YES. [2023-01-28 04:50:11,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2614 conditions, 565 events. 313/565 cut-off events. For 2250/2250 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2400 event pairs, 13 based on Foata normal form. 22/587 useless extension candidates. Maximal degree in co-relation 2022. Up to 183 conditions per place. [2023-01-28 04:50:11,578 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 93 selfloop transitions, 47 changer transitions 13/153 dead transitions. [2023-01-28 04:50:11,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 153 transitions, 1332 flow [2023-01-28 04:50:11,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 04:50:11,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 04:50:11,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 980 transitions. [2023-01-28 04:50:11,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43133802816901406 [2023-01-28 04:50:11,580 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 980 transitions. [2023-01-28 04:50:11,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 980 transitions. [2023-01-28 04:50:11,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:50:11,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 980 transitions. [2023-01-28 04:50:11,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 61.25) internal successors, (980), 16 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:11,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 142.0) internal successors, (2414), 17 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:11,585 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 142.0) internal successors, (2414), 17 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:11,585 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 364 flow. Second operand 16 states and 980 transitions. [2023-01-28 04:50:11,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 153 transitions, 1332 flow [2023-01-28 04:50:11,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 153 transitions, 1273 flow, removed 26 selfloop flow, removed 2 redundant places. [2023-01-28 04:50:11,591 INFO L231 Difference]: Finished difference. Result has 63 places, 77 transitions, 741 flow [2023-01-28 04:50:11,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=741, PETRI_PLACES=63, PETRI_TRANSITIONS=77} [2023-01-28 04:50:11,592 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 43 predicate places. [2023-01-28 04:50:11,592 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 77 transitions, 741 flow [2023-01-28 04:50:11,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 57.285714285714285) internal successors, (802), 14 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:11,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:50:11,593 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:50:11,599 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 04:50:11,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:50:11,800 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:50:11,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:50:11,800 INFO L85 PathProgramCache]: Analyzing trace with hash -2047268056, now seen corresponding path program 4 times [2023-01-28 04:50:11,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:50:11,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154223569] [2023-01-28 04:50:11,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:50:11,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:50:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:50:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:11,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:50:11,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154223569] [2023-01-28 04:50:11,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154223569] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:50:11,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250535639] [2023-01-28 04:50:11,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:50:11,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:50:11,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:50:11,954 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 04:50:11,969 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 04:50:12,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:50:12,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:50:12,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 04:50:12,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:50:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:12,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:50:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:12,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250535639] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:50:12,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:50:12,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-28 04:50:12,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859923255] [2023-01-28 04:50:12,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:50:12,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 04:50:12,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:50:12,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 04:50:12,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-01-28 04:50:12,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 142 [2023-01-28 04:50:12,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 77 transitions, 741 flow. Second operand has 16 states, 16 states have (on average 57.125) internal successors, (914), 16 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:12,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:50:12,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 142 [2023-01-28 04:50:12,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:50:12,680 INFO L130 PetriNetUnfolder]: 372/680 cut-off events. [2023-01-28 04:50:12,680 INFO L131 PetriNetUnfolder]: For 6308/6308 co-relation queries the response was YES. [2023-01-28 04:50:12,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3787 conditions, 680 events. 372/680 cut-off events. For 6308/6308 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3114 event pairs, 24 based on Foata normal form. 38/718 useless extension candidates. Maximal degree in co-relation 3026. Up to 239 conditions per place. [2023-01-28 04:50:12,684 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 118 selfloop transitions, 54 changer transitions 11/183 dead transitions. [2023-01-28 04:50:12,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 183 transitions, 1855 flow [2023-01-28 04:50:12,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 04:50:12,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 04:50:12,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1169 transitions. [2023-01-28 04:50:12,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4332839140103781 [2023-01-28 04:50:12,687 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1169 transitions. [2023-01-28 04:50:12,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1169 transitions. [2023-01-28 04:50:12,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:50:12,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1169 transitions. [2023-01-28 04:50:12,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 61.526315789473685) internal successors, (1169), 19 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:12,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:12,692 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:12,692 INFO L175 Difference]: Start difference. First operand has 63 places, 77 transitions, 741 flow. Second operand 19 states and 1169 transitions. [2023-01-28 04:50:12,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 183 transitions, 1855 flow [2023-01-28 04:50:12,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 183 transitions, 1690 flow, removed 75 selfloop flow, removed 5 redundant places. [2023-01-28 04:50:12,703 INFO L231 Difference]: Finished difference. Result has 83 places, 101 transitions, 1127 flow [2023-01-28 04:50:12,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1127, PETRI_PLACES=83, PETRI_TRANSITIONS=101} [2023-01-28 04:50:12,704 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 63 predicate places. [2023-01-28 04:50:12,704 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 101 transitions, 1127 flow [2023-01-28 04:50:12,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.125) internal successors, (914), 16 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:12,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:50:12,705 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:50:12,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-01-28 04:50:12,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:50:12,912 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:50:12,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:50:12,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1082077996, now seen corresponding path program 5 times [2023-01-28 04:50:12,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:50:12,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355681794] [2023-01-28 04:50:12,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:50:12,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:50:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:50:13,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:13,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:50:13,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355681794] [2023-01-28 04:50:13,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355681794] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:50:13,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043690748] [2023-01-28 04:50:13,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:50:13,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:50:13,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:50:13,041 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:50:13,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 04:50:13,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:50:13,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:50:13,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:50:13,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:50:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:13,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:50:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:13,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043690748] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:50:13,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:50:13,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-28 04:50:13,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061275780] [2023-01-28 04:50:13,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:50:13,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 04:50:13,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:50:13,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 04:50:13,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-01-28 04:50:13,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-01-28 04:50:13,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 101 transitions, 1127 flow. Second operand has 16 states, 16 states have (on average 60.0625) internal successors, (961), 16 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:13,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:50:13,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-01-28 04:50:13,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:50:14,479 INFO L130 PetriNetUnfolder]: 537/1037 cut-off events. [2023-01-28 04:50:14,480 INFO L131 PetriNetUnfolder]: For 18920/18920 co-relation queries the response was YES. [2023-01-28 04:50:14,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6850 conditions, 1037 events. 537/1037 cut-off events. For 18920/18920 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5562 event pairs, 29 based on Foata normal form. 24/1061 useless extension candidates. Maximal degree in co-relation 5560. Up to 355 conditions per place. [2023-01-28 04:50:14,486 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 143 selfloop transitions, 105 changer transitions 33/281 dead transitions. [2023-01-28 04:50:14,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 281 transitions, 3057 flow [2023-01-28 04:50:14,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 04:50:14,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 04:50:14,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1937 transitions. [2023-01-28 04:50:14,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4546948356807512 [2023-01-28 04:50:14,489 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1937 transitions. [2023-01-28 04:50:14,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1937 transitions. [2023-01-28 04:50:14,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:50:14,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1937 transitions. [2023-01-28 04:50:14,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 64.56666666666666) internal successors, (1937), 30 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 04:50:14,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 142.0) internal successors, (4402), 31 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:14,497 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 142.0) internal successors, (4402), 31 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:14,497 INFO L175 Difference]: Start difference. First operand has 83 places, 101 transitions, 1127 flow. Second operand 30 states and 1937 transitions. [2023-01-28 04:50:14,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 281 transitions, 3057 flow [2023-01-28 04:50:14,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 281 transitions, 2806 flow, removed 119 selfloop flow, removed 3 redundant places. [2023-01-28 04:50:14,524 INFO L231 Difference]: Finished difference. Result has 124 places, 141 transitions, 1769 flow [2023-01-28 04:50:14,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1769, PETRI_PLACES=124, PETRI_TRANSITIONS=141} [2023-01-28 04:50:14,525 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 104 predicate places. [2023-01-28 04:50:14,525 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 141 transitions, 1769 flow [2023-01-28 04:50:14,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 60.0625) internal successors, (961), 16 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:14,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:50:14,525 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:50:14,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 04:50:14,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:50:14,731 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:50:14,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:50:14,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1580942134, now seen corresponding path program 6 times [2023-01-28 04:50:14,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:50:14,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685456222] [2023-01-28 04:50:14,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:50:14,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:50:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:50:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:14,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:50:14,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685456222] [2023-01-28 04:50:14,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685456222] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:50:14,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010765014] [2023-01-28 04:50:14,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:50:14,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:50:14,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:50:14,893 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:50:14,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 04:50:14,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 04:50:14,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:50:14,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:50:14,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:50:15,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:15,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:50:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:15,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010765014] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:50:15,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:50:15,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-01-28 04:50:15,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775259889] [2023-01-28 04:50:15,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:50:15,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 04:50:15,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:50:15,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 04:50:15,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-01-28 04:50:15,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-01-28 04:50:15,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 141 transitions, 1769 flow. Second operand has 14 states, 14 states have (on average 60.285714285714285) internal successors, (844), 14 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:15,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:50:15,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-01-28 04:50:15,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:50:16,032 INFO L130 PetriNetUnfolder]: 626/1220 cut-off events. [2023-01-28 04:50:16,032 INFO L131 PetriNetUnfolder]: For 29888/29888 co-relation queries the response was YES. [2023-01-28 04:50:16,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9038 conditions, 1220 events. 626/1220 cut-off events. For 29888/29888 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6893 event pairs, 103 based on Foata normal form. 40/1260 useless extension candidates. Maximal degree in co-relation 8284. Up to 443 conditions per place. [2023-01-28 04:50:16,041 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 114 selfloop transitions, 119 changer transitions 6/239 dead transitions. [2023-01-28 04:50:16,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 239 transitions, 3353 flow [2023-01-28 04:50:16,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 04:50:16,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 04:50:16,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1085 transitions. [2023-01-28 04:50:16,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494614747307374 [2023-01-28 04:50:16,043 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1085 transitions. [2023-01-28 04:50:16,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1085 transitions. [2023-01-28 04:50:16,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:50:16,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1085 transitions. [2023-01-28 04:50:16,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 63.8235294117647) internal successors, (1085), 17 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:16,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 142.0) internal successors, (2556), 18 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:16,048 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 142.0) internal successors, (2556), 18 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:16,048 INFO L175 Difference]: Start difference. First operand has 124 places, 141 transitions, 1769 flow. Second operand 17 states and 1085 transitions. [2023-01-28 04:50:16,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 239 transitions, 3353 flow [2023-01-28 04:50:16,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 239 transitions, 3099 flow, removed 97 selfloop flow, removed 13 redundant places. [2023-01-28 04:50:16,088 INFO L231 Difference]: Finished difference. Result has 133 places, 186 transitions, 2784 flow [2023-01-28 04:50:16,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2784, PETRI_PLACES=133, PETRI_TRANSITIONS=186} [2023-01-28 04:50:16,088 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 113 predicate places. [2023-01-28 04:50:16,088 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 186 transitions, 2784 flow [2023-01-28 04:50:16,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 60.285714285714285) internal successors, (844), 14 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:16,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:50:16,089 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:50:16,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 04:50:16,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:50:16,294 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:50:16,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:50:16,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1860953658, now seen corresponding path program 7 times [2023-01-28 04:50:16,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:50:16,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480751323] [2023-01-28 04:50:16,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:50:16,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:50:16,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:50:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:16,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:50:16,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480751323] [2023-01-28 04:50:16,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480751323] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:50:16,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266171570] [2023-01-28 04:50:16,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:50:16,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:50:16,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:50:16,415 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:50:16,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 04:50:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:50:16,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 04:50:16,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:50:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:16,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:50:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:16,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266171570] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:50:16,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:50:16,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 04:50:16,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723749391] [2023-01-28 04:50:16,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:50:16,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 04:50:16,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:50:16,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 04:50:16,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-01-28 04:50:16,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 142 [2023-01-28 04:50:16,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 186 transitions, 2784 flow. Second operand has 15 states, 15 states have (on average 57.06666666666667) internal successors, (856), 15 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:16,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:50:16,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 142 [2023-01-28 04:50:16,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:50:17,315 INFO L130 PetriNetUnfolder]: 810/1574 cut-off events. [2023-01-28 04:50:17,315 INFO L131 PetriNetUnfolder]: For 42907/42907 co-relation queries the response was YES. [2023-01-28 04:50:17,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12757 conditions, 1574 events. 810/1574 cut-off events. For 42907/42907 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9502 event pairs, 98 based on Foata normal form. 52/1626 useless extension candidates. Maximal degree in co-relation 11619. Up to 1051 conditions per place. [2023-01-28 04:50:17,327 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 213 selfloop transitions, 130 changer transitions 6/349 dead transitions. [2023-01-28 04:50:17,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 349 transitions, 5476 flow [2023-01-28 04:50:17,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 04:50:17,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 04:50:17,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1412 transitions. [2023-01-28 04:50:17,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43233312921004285 [2023-01-28 04:50:17,329 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1412 transitions. [2023-01-28 04:50:17,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1412 transitions. [2023-01-28 04:50:17,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:50:17,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1412 transitions. [2023-01-28 04:50:17,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 61.391304347826086) internal successors, (1412), 23 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:17,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 142.0) internal successors, (3408), 24 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:17,334 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 142.0) internal successors, (3408), 24 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:17,334 INFO L175 Difference]: Start difference. First operand has 133 places, 186 transitions, 2784 flow. Second operand 23 states and 1412 transitions. [2023-01-28 04:50:17,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 349 transitions, 5476 flow [2023-01-28 04:50:17,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 349 transitions, 5026 flow, removed 215 selfloop flow, removed 4 redundant places. [2023-01-28 04:50:17,432 INFO L231 Difference]: Finished difference. Result has 165 places, 256 transitions, 4217 flow [2023-01-28 04:50:17,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=2511, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4217, PETRI_PLACES=165, PETRI_TRANSITIONS=256} [2023-01-28 04:50:17,433 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 145 predicate places. [2023-01-28 04:50:17,433 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 256 transitions, 4217 flow [2023-01-28 04:50:17,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 57.06666666666667) internal successors, (856), 15 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:17,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:50:17,433 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:50:17,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 04:50:17,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-01-28 04:50:17,640 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:50:17,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:50:17,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1468102828, now seen corresponding path program 8 times [2023-01-28 04:50:17,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:50:17,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224807610] [2023-01-28 04:50:17,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:50:17,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:50:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:50:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:17,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:50:17,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224807610] [2023-01-28 04:50:17,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224807610] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:50:17,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060031819] [2023-01-28 04:50:17,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:50:17,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:50:17,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:50:17,809 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:50:17,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 04:50:17,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:50:17,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:50:17,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:50:17,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:50:17,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:17,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:50:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:18,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060031819] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:50:18,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:50:18,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 04:50:18,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267396142] [2023-01-28 04:50:18,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:50:18,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 04:50:18,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:50:18,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 04:50:18,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-01-28 04:50:18,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-01-28 04:50:18,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 256 transitions, 4217 flow. Second operand has 15 states, 15 states have (on average 59.733333333333334) internal successors, (896), 15 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:18,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:50:18,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-01-28 04:50:18,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:50:19,755 INFO L130 PetriNetUnfolder]: 998/1958 cut-off events. [2023-01-28 04:50:19,755 INFO L131 PetriNetUnfolder]: For 73427/73427 co-relation queries the response was YES. [2023-01-28 04:50:19,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17101 conditions, 1958 events. 998/1958 cut-off events. For 73427/73427 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 12509 event pairs, 168 based on Foata normal form. 24/1982 useless extension candidates. Maximal degree in co-relation 14924. Up to 886 conditions per place. [2023-01-28 04:50:19,804 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 209 selfloop transitions, 183 changer transitions 5/397 dead transitions. [2023-01-28 04:50:19,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 397 transitions, 7052 flow [2023-01-28 04:50:19,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 04:50:19,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 04:50:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1415 transitions. [2023-01-28 04:50:19,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529449423815621 [2023-01-28 04:50:19,807 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1415 transitions. [2023-01-28 04:50:19,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1415 transitions. [2023-01-28 04:50:19,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:50:19,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1415 transitions. [2023-01-28 04:50:19,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 64.31818181818181) internal successors, (1415), 22 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:19,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:19,813 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:19,813 INFO L175 Difference]: Start difference. First operand has 165 places, 256 transitions, 4217 flow. Second operand 22 states and 1415 transitions. [2023-01-28 04:50:19,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 397 transitions, 7052 flow [2023-01-28 04:50:20,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 397 transitions, 6218 flow, removed 399 selfloop flow, removed 5 redundant places. [2023-01-28 04:50:20,007 INFO L231 Difference]: Finished difference. Result has 191 places, 307 transitions, 5255 flow [2023-01-28 04:50:20,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=3769, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5255, PETRI_PLACES=191, PETRI_TRANSITIONS=307} [2023-01-28 04:50:20,008 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 171 predicate places. [2023-01-28 04:50:20,008 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 307 transitions, 5255 flow [2023-01-28 04:50:20,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 59.733333333333334) internal successors, (896), 15 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:20,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:50:20,009 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:50:20,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-01-28 04:50:20,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:50:20,214 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:50:20,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:50:20,214 INFO L85 PathProgramCache]: Analyzing trace with hash 265383622, now seen corresponding path program 9 times [2023-01-28 04:50:20,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:50:20,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905568714] [2023-01-28 04:50:20,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:50:20,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:50:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:50:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:20,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:50:20,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905568714] [2023-01-28 04:50:20,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905568714] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:50:20,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98789778] [2023-01-28 04:50:20,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:50:20,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:50:20,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:50:20,445 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:50:20,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 04:50:20,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 04:50:20,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:50:20,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-28 04:50:20,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:50:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:20,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:50:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:50:20,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98789778] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:50:20,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:50:20,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 4] total 14 [2023-01-28 04:50:20,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090992803] [2023-01-28 04:50:20,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:50:20,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 04:50:20,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:50:20,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 04:50:20,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-01-28 04:50:20,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 142 [2023-01-28 04:50:20,842 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 307 transitions, 5255 flow. Second operand has 16 states, 16 states have (on average 53.5625) internal successors, (857), 16 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:20,842 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:50:20,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 142 [2023-01-28 04:50:20,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:50:21,438 INFO L130 PetriNetUnfolder]: 1317/2580 cut-off events. [2023-01-28 04:50:21,438 INFO L131 PetriNetUnfolder]: For 103291/103291 co-relation queries the response was YES. [2023-01-28 04:50:21,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23861 conditions, 2580 events. 1317/2580 cut-off events. For 103291/103291 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 17575 event pairs, 144 based on Foata normal form. 13/2593 useless extension candidates. Maximal degree in co-relation 22833. Up to 1044 conditions per place. [2023-01-28 04:50:21,468 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 248 selfloop transitions, 132 changer transitions 88/471 dead transitions. [2023-01-28 04:50:21,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 471 transitions, 9157 flow [2023-01-28 04:50:21,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 04:50:21,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 04:50:21,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 646 transitions. [2023-01-28 04:50:21,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41357234314980795 [2023-01-28 04:50:21,470 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 646 transitions. [2023-01-28 04:50:21,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 646 transitions. [2023-01-28 04:50:21,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:50:21,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 646 transitions. [2023-01-28 04:50:21,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.72727272727273) internal successors, (646), 11 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:21,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 142.0) internal successors, (1704), 12 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:21,473 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 142.0) internal successors, (1704), 12 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:21,473 INFO L175 Difference]: Start difference. First operand has 191 places, 307 transitions, 5255 flow. Second operand 11 states and 646 transitions. [2023-01-28 04:50:21,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 471 transitions, 9157 flow [2023-01-28 04:50:21,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 471 transitions, 8904 flow, removed 92 selfloop flow, removed 4 redundant places. [2023-01-28 04:50:21,747 INFO L231 Difference]: Finished difference. Result has 203 places, 330 transitions, 6244 flow [2023-01-28 04:50:21,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=5060, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6244, PETRI_PLACES=203, PETRI_TRANSITIONS=330} [2023-01-28 04:50:21,748 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 183 predicate places. [2023-01-28 04:50:21,748 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 330 transitions, 6244 flow [2023-01-28 04:50:21,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 53.5625) internal successors, (857), 16 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:21,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:50:21,749 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:50:21,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 04:50:21,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-01-28 04:50:21,954 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:50:21,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:50:21,954 INFO L85 PathProgramCache]: Analyzing trace with hash -27278176, now seen corresponding path program 10 times [2023-01-28 04:50:21,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:50:21,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947767266] [2023-01-28 04:50:21,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:50:21,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:50:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:50:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:22,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:50:22,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947767266] [2023-01-28 04:50:22,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947767266] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:50:22,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409489666] [2023-01-28 04:50:22,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:50:22,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:50:22,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:50:22,192 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:50:22,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 04:50:22,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:50:22,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:50:22,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 04:50:22,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:50:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:50:22,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:50:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:50:22,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409489666] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:50:22,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:50:22,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2023-01-28 04:50:22,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104181090] [2023-01-28 04:50:22,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:50:22,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 04:50:22,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:50:22,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 04:50:22,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-01-28 04:50:22,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-28 04:50:22,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 330 transitions, 6244 flow. Second operand has 15 states, 15 states have (on average 55.266666666666666) internal successors, (829), 15 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:22,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:50:22,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-28 04:50:22,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:50:23,670 INFO L130 PetriNetUnfolder]: 1163/2353 cut-off events. [2023-01-28 04:50:23,670 INFO L131 PetriNetUnfolder]: For 125038/125038 co-relation queries the response was YES. [2023-01-28 04:50:23,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22748 conditions, 2353 events. 1163/2353 cut-off events. For 125038/125038 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 16153 event pairs, 98 based on Foata normal form. 62/2415 useless extension candidates. Maximal degree in co-relation 21468. Up to 972 conditions per place. [2023-01-28 04:50:23,693 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 274 selfloop transitions, 154 changer transitions 48/476 dead transitions. [2023-01-28 04:50:23,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 476 transitions, 9738 flow [2023-01-28 04:50:23,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 04:50:23,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-28 04:50:23,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1906 transitions. [2023-01-28 04:50:23,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4067434912505335 [2023-01-28 04:50:23,695 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1906 transitions. [2023-01-28 04:50:23,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1906 transitions. [2023-01-28 04:50:23,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:50:23,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1906 transitions. [2023-01-28 04:50:23,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 57.75757575757576) internal successors, (1906), 33 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:23,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 142.0) internal successors, (4828), 34 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:23,702 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 142.0) internal successors, (4828), 34 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:23,703 INFO L175 Difference]: Start difference. First operand has 203 places, 330 transitions, 6244 flow. Second operand 33 states and 1906 transitions. [2023-01-28 04:50:23,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 476 transitions, 9738 flow [2023-01-28 04:50:23,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 476 transitions, 9256 flow, removed 217 selfloop flow, removed 3 redundant places. [2023-01-28 04:50:23,987 INFO L231 Difference]: Finished difference. Result has 243 places, 357 transitions, 7078 flow [2023-01-28 04:50:23,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=5897, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7078, PETRI_PLACES=243, PETRI_TRANSITIONS=357} [2023-01-28 04:50:23,987 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 223 predicate places. [2023-01-28 04:50:23,987 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 357 transitions, 7078 flow [2023-01-28 04:50:23,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 55.266666666666666) internal successors, (829), 15 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:23,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:50:23,988 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:50:23,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 04:50:24,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-28 04:50:24,193 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:50:24,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:50:24,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1060710988, now seen corresponding path program 11 times [2023-01-28 04:50:24,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:50:24,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291919294] [2023-01-28 04:50:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:50:24,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:50:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:50:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:24,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:50:24,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291919294] [2023-01-28 04:50:24,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291919294] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:50:24,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935190293] [2023-01-28 04:50:24,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:50:24,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:50:24,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:50:24,338 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:50:24,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 04:50:24,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 04:50:24,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:50:24,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2023-01-28 04:50:24,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:50:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:24,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:50:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:50:50,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935190293] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:50:50,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:50:50,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2023-01-28 04:50:50,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815541912] [2023-01-28 04:50:50,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:50:50,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 04:50:50,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:50:50,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 04:50:50,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-01-28 04:50:50,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-28 04:50:50,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 357 transitions, 7078 flow. Second operand has 18 states, 18 states have (on average 54.888888888888886) internal successors, (988), 18 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:50:50,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:50:50,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-28 04:50:50,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:50:57,292 WARN L222 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 86 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 04:50:59,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 04:51:01,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 04:51:11,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 04:51:14,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-01-28 04:51:18,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 04:51:19,452 INFO L130 PetriNetUnfolder]: 1304/2625 cut-off events. [2023-01-28 04:51:19,452 INFO L131 PetriNetUnfolder]: For 136993/136993 co-relation queries the response was YES. [2023-01-28 04:51:19,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26038 conditions, 2625 events. 1304/2625 cut-off events. For 136993/136993 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 18303 event pairs, 36 based on Foata normal form. 36/2661 useless extension candidates. Maximal degree in co-relation 25450. Up to 686 conditions per place. [2023-01-28 04:51:19,491 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 221 selfloop transitions, 305 changer transitions 4/530 dead transitions. [2023-01-28 04:51:19,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 530 transitions, 11354 flow [2023-01-28 04:51:19,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 04:51:19,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 04:51:19,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1516 transitions. [2023-01-28 04:51:19,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106175514626219 [2023-01-28 04:51:19,494 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1516 transitions. [2023-01-28 04:51:19,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1516 transitions. [2023-01-28 04:51:19,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:51:19,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1516 transitions. [2023-01-28 04:51:19,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 58.30769230769231) internal successors, (1516), 26 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:51:19,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 142.0) internal successors, (3834), 27 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:51:19,500 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 142.0) internal successors, (3834), 27 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:51:19,500 INFO L175 Difference]: Start difference. First operand has 243 places, 357 transitions, 7078 flow. Second operand 26 states and 1516 transitions. [2023-01-28 04:51:19,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 530 transitions, 11354 flow [2023-01-28 04:51:19,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 530 transitions, 10574 flow, removed 255 selfloop flow, removed 14 redundant places. [2023-01-28 04:51:19,862 INFO L231 Difference]: Finished difference. Result has 259 places, 452 transitions, 10127 flow [2023-01-28 04:51:19,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=6557, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=10127, PETRI_PLACES=259, PETRI_TRANSITIONS=452} [2023-01-28 04:51:19,862 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 239 predicate places. [2023-01-28 04:51:19,862 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 452 transitions, 10127 flow [2023-01-28 04:51:19,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.888888888888886) internal successors, (988), 18 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:51:19,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:51:19,863 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:51:19,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 04:51:20,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-28 04:51:20,068 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:51:20,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:51:20,068 INFO L85 PathProgramCache]: Analyzing trace with hash 881546728, now seen corresponding path program 12 times [2023-01-28 04:51:20,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:51:20,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664524413] [2023-01-28 04:51:20,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:51:20,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:51:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:51:20,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:51:20,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:51:20,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664524413] [2023-01-28 04:51:20,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664524413] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:51:20,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5055295] [2023-01-28 04:51:20,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:51:20,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:51:20,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:51:20,238 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:51:20,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 04:51:20,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 04:51:20,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:51:20,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 04:51:20,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:51:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:51:20,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:51:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:51:44,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5055295] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:51:44,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:51:44,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-01-28 04:51:44,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355351492] [2023-01-28 04:51:44,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:51:44,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 04:51:44,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:51:44,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 04:51:44,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-01-28 04:51:44,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 142 [2023-01-28 04:51:44,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 452 transitions, 10127 flow. Second operand has 18 states, 18 states have (on average 56.94444444444444) internal successors, (1025), 18 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:51:44,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:51:44,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 142 [2023-01-28 04:51:44,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:51:49,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 04:51:54,842 INFO L130 PetriNetUnfolder]: 1474/3041 cut-off events. [2023-01-28 04:51:54,842 INFO L131 PetriNetUnfolder]: For 160560/160560 co-relation queries the response was YES. [2023-01-28 04:51:54,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32336 conditions, 3041 events. 1474/3041 cut-off events. For 160560/160560 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 22296 event pairs, 40 based on Foata normal form. 36/3077 useless extension candidates. Maximal degree in co-relation 31561. Up to 797 conditions per place. [2023-01-28 04:51:54,871 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 237 selfloop transitions, 360 changer transitions 5/602 dead transitions. [2023-01-28 04:51:54,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 602 transitions, 14664 flow [2023-01-28 04:51:54,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 04:51:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 04:51:54,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1161 transitions. [2023-01-28 04:51:54,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4303187546330615 [2023-01-28 04:51:54,874 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1161 transitions. [2023-01-28 04:51:54,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1161 transitions. [2023-01-28 04:51:54,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:51:54,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1161 transitions. [2023-01-28 04:51:54,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 61.10526315789474) internal successors, (1161), 19 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:51:54,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:51:54,879 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:51:54,879 INFO L175 Difference]: Start difference. First operand has 259 places, 452 transitions, 10127 flow. Second operand 19 states and 1161 transitions. [2023-01-28 04:51:54,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 602 transitions, 14664 flow [2023-01-28 04:51:55,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 602 transitions, 12891 flow, removed 827 selfloop flow, removed 20 redundant places. [2023-01-28 04:51:55,591 INFO L231 Difference]: Finished difference. Result has 265 places, 527 transitions, 12291 flow [2023-01-28 04:51:55,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=8865, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=12291, PETRI_PLACES=265, PETRI_TRANSITIONS=527} [2023-01-28 04:51:55,592 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 245 predicate places. [2023-01-28 04:51:55,592 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 527 transitions, 12291 flow [2023-01-28 04:51:55,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.94444444444444) internal successors, (1025), 18 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:51:55,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:51:55,592 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:51:55,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-28 04:51:55,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 04:51:55,797 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:51:55,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:51:55,797 INFO L85 PathProgramCache]: Analyzing trace with hash -2093573005, now seen corresponding path program 13 times [2023-01-28 04:51:55,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:51:55,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10883232] [2023-01-28 04:51:55,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:51:55,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:51:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:51:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:51:56,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:51:56,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10883232] [2023-01-28 04:51:56,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10883232] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:51:56,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044241267] [2023-01-28 04:51:56,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:51:56,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:51:56,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:51:56,082 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:51:56,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 04:51:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:51:56,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 04:51:56,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:51:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:51:56,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:51:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:51:56,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044241267] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:51:56,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:51:56,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-01-28 04:51:56,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660310889] [2023-01-28 04:51:56,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:51:56,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 04:51:56,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:51:56,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 04:51:56,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-01-28 04:51:56,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-28 04:51:56,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 527 transitions, 12291 flow. Second operand has 24 states, 24 states have (on average 55.083333333333336) internal successors, (1322), 24 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:51:56,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:51:56,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-28 04:51:56,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:51:59,069 INFO L130 PetriNetUnfolder]: 3046/6355 cut-off events. [2023-01-28 04:51:59,070 INFO L131 PetriNetUnfolder]: For 237809/237809 co-relation queries the response was YES. [2023-01-28 04:51:59,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64458 conditions, 6355 events. 3046/6355 cut-off events. For 237809/237809 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 53680 event pairs, 366 based on Foata normal form. 72/6427 useless extension candidates. Maximal degree in co-relation 62695. Up to 2468 conditions per place. [2023-01-28 04:51:59,156 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 859 selfloop transitions, 355 changer transitions 27/1241 dead transitions. [2023-01-28 04:51:59,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1241 transitions, 30825 flow [2023-01-28 04:51:59,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 04:51:59,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 04:51:59,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2017 transitions. [2023-01-28 04:51:59,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41777133388566695 [2023-01-28 04:51:59,165 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2017 transitions. [2023-01-28 04:51:59,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2017 transitions. [2023-01-28 04:51:59,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:51:59,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2017 transitions. [2023-01-28 04:51:59,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 59.3235294117647) internal successors, (2017), 34 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:51:59,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 142.0) internal successors, (4970), 35 states have internal predecessors, (4970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:51:59,179 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 142.0) internal successors, (4970), 35 states have internal predecessors, (4970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:51:59,179 INFO L175 Difference]: Start difference. First operand has 265 places, 527 transitions, 12291 flow. Second operand 34 states and 2017 transitions. [2023-01-28 04:51:59,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1241 transitions, 30825 flow [2023-01-28 04:52:01,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 1241 transitions, 28502 flow, removed 1007 selfloop flow, removed 9 redundant places. [2023-01-28 04:52:01,181 INFO L231 Difference]: Finished difference. Result has 304 places, 764 transitions, 18177 flow [2023-01-28 04:52:01,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=11396, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=18177, PETRI_PLACES=304, PETRI_TRANSITIONS=764} [2023-01-28 04:52:01,182 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 284 predicate places. [2023-01-28 04:52:01,182 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 764 transitions, 18177 flow [2023-01-28 04:52:01,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 55.083333333333336) internal successors, (1322), 24 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:52:01,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:52:01,183 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:52:01,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-01-28 04:52:01,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:52:01,384 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:52:01,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:52:01,385 INFO L85 PathProgramCache]: Analyzing trace with hash -237627691, now seen corresponding path program 14 times [2023-01-28 04:52:01,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:52:01,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679692165] [2023-01-28 04:52:01,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:52:01,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:52:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:52:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:52:01,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:52:01,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679692165] [2023-01-28 04:52:01,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679692165] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:52:01,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632791001] [2023-01-28 04:52:01,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:52:01,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:52:01,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:52:01,563 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:52:01,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 04:52:01,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:52:01,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:52:01,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 04:52:01,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:52:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:52:01,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:52:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:52:02,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632791001] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:52:02,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:52:02,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-01-28 04:52:02,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365670600] [2023-01-28 04:52:02,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:52:02,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 04:52:02,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:52:02,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 04:52:02,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-01-28 04:52:02,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-28 04:52:02,222 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 764 transitions, 18177 flow. Second operand has 20 states, 20 states have (on average 54.6) internal successors, (1092), 20 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:52:02,222 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:52:02,222 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-28 04:52:02,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:52:06,693 INFO L130 PetriNetUnfolder]: 3593/7580 cut-off events. [2023-01-28 04:52:06,693 INFO L131 PetriNetUnfolder]: For 304600/304600 co-relation queries the response was YES. [2023-01-28 04:52:06,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78809 conditions, 7580 events. 3593/7580 cut-off events. For 304600/304600 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 66558 event pairs, 323 based on Foata normal form. 110/7690 useless extension candidates. Maximal degree in co-relation 77373. Up to 1551 conditions per place. [2023-01-28 04:52:06,777 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 625 selfloop transitions, 805 changer transitions 47/1477 dead transitions. [2023-01-28 04:52:06,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1477 transitions, 37585 flow [2023-01-28 04:52:06,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-01-28 04:52:06,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-01-28 04:52:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3040 transitions. [2023-01-28 04:52:06,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41170097508125675 [2023-01-28 04:52:06,781 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3040 transitions. [2023-01-28 04:52:06,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3040 transitions. [2023-01-28 04:52:06,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:52:06,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3040 transitions. [2023-01-28 04:52:06,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 58.46153846153846) internal successors, (3040), 52 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:52:06,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 142.0) internal successors, (7526), 53 states have internal predecessors, (7526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:52:06,790 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 142.0) internal successors, (7526), 53 states have internal predecessors, (7526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:52:06,790 INFO L175 Difference]: Start difference. First operand has 304 places, 764 transitions, 18177 flow. Second operand 52 states and 3040 transitions. [2023-01-28 04:52:06,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1477 transitions, 37585 flow [2023-01-28 04:52:09,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 1477 transitions, 36334 flow, removed 581 selfloop flow, removed 8 redundant places. [2023-01-28 04:52:09,642 INFO L231 Difference]: Finished difference. Result has 363 places, 1097 transitions, 29447 flow [2023-01-28 04:52:09,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=16611, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=471, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=29447, PETRI_PLACES=363, PETRI_TRANSITIONS=1097} [2023-01-28 04:52:09,648 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 343 predicate places. [2023-01-28 04:52:09,649 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 1097 transitions, 29447 flow [2023-01-28 04:52:09,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.6) internal successors, (1092), 20 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:52:09,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:52:09,649 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:52:09,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-01-28 04:52:09,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 04:52:09,853 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:52:09,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:52:09,854 INFO L85 PathProgramCache]: Analyzing trace with hash 513615913, now seen corresponding path program 15 times [2023-01-28 04:52:09,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:52:09,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223175183] [2023-01-28 04:52:09,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:52:09,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:52:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:52:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:52:10,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:52:10,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223175183] [2023-01-28 04:52:10,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223175183] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:52:10,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374717406] [2023-01-28 04:52:10,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:52:10,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:52:10,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:52:10,107 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:52:10,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 04:52:10,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 04:52:10,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:52:10,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 04:52:10,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:52:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:52:10,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:52:10,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:52:10,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374717406] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:52:10,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:52:10,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-01-28 04:52:10,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610844754] [2023-01-28 04:52:10,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:52:10,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 04:52:10,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:52:10,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 04:52:10,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2023-01-28 04:52:10,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 142 [2023-01-28 04:52:10,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 1097 transitions, 29447 flow. Second operand has 23 states, 23 states have (on average 56.65217391304348) internal successors, (1303), 23 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:52:10,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:52:10,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 142 [2023-01-28 04:52:10,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:52:16,747 INFO L130 PetriNetUnfolder]: 3894/8063 cut-off events. [2023-01-28 04:52:16,747 INFO L131 PetriNetUnfolder]: For 404809/404809 co-relation queries the response was YES. [2023-01-28 04:52:16,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89735 conditions, 8063 events. 3894/8063 cut-off events. For 404809/404809 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 70588 event pairs, 254 based on Foata normal form. 210/8273 useless extension candidates. Maximal degree in co-relation 88378. Up to 2229 conditions per place. [2023-01-28 04:52:16,833 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 640 selfloop transitions, 822 changer transitions 8/1470 dead transitions. [2023-01-28 04:52:16,833 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1470 transitions, 39881 flow [2023-01-28 04:52:16,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-01-28 04:52:16,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-01-28 04:52:16,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3258 transitions. [2023-01-28 04:52:16,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42488262910798125 [2023-01-28 04:52:16,863 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3258 transitions. [2023-01-28 04:52:16,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3258 transitions. [2023-01-28 04:52:16,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:52:16,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3258 transitions. [2023-01-28 04:52:16,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 60.333333333333336) internal successors, (3258), 54 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:52:16,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 142.0) internal successors, (7810), 55 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:52:16,873 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 142.0) internal successors, (7810), 55 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:52:16,873 INFO L175 Difference]: Start difference. First operand has 363 places, 1097 transitions, 29447 flow. Second operand 54 states and 3258 transitions. [2023-01-28 04:52:16,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1470 transitions, 39881 flow [2023-01-28 04:52:20,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 1470 transitions, 36119 flow, removed 1850 selfloop flow, removed 13 redundant places. [2023-01-28 04:52:20,755 INFO L231 Difference]: Finished difference. Result has 409 places, 1280 transitions, 34018 flow [2023-01-28 04:52:20,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=26760, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1095, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=649, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=34018, PETRI_PLACES=409, PETRI_TRANSITIONS=1280} [2023-01-28 04:52:20,756 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 389 predicate places. [2023-01-28 04:52:20,756 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 1280 transitions, 34018 flow [2023-01-28 04:52:20,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.65217391304348) internal successors, (1303), 23 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:52:20,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:52:20,756 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:52:20,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-01-28 04:52:20,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 04:52:20,961 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:52:20,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:52:20,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1409095033, now seen corresponding path program 16 times [2023-01-28 04:52:20,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:52:20,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761582278] [2023-01-28 04:52:20,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:52:20,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:52:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:52:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:52:21,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:52:21,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761582278] [2023-01-28 04:52:21,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761582278] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:52:21,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272134560] [2023-01-28 04:52:21,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:52:21,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:52:21,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:52:21,179 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:52:21,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 04:52:21,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:52:21,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:52:21,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 04:52:21,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:52:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:52:21,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:52:21,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:52:21,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272134560] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:52:21,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:52:21,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-01-28 04:52:21,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985172392] [2023-01-28 04:52:21,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:52:21,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 04:52:21,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:52:21,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 04:52:21,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2023-01-28 04:52:21,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-28 04:52:21,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 1280 transitions, 34018 flow. Second operand has 23 states, 23 states have (on average 54.78260869565217) internal successors, (1260), 23 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:52:21,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:52:21,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-28 04:52:21,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:52:39,457 INFO L130 PetriNetUnfolder]: 4945/10303 cut-off events. [2023-01-28 04:52:39,457 INFO L131 PetriNetUnfolder]: For 523749/523749 co-relation queries the response was YES. [2023-01-28 04:52:39,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114001 conditions, 10303 events. 4945/10303 cut-off events. For 523749/523749 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 94535 event pairs, 158 based on Foata normal form. 102/10405 useless extension candidates. Maximal degree in co-relation 111923. Up to 2145 conditions per place. [2023-01-28 04:52:39,593 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 823 selfloop transitions, 1195 changer transitions 8/2026 dead transitions. [2023-01-28 04:52:39,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 2026 transitions, 54568 flow [2023-01-28 04:52:39,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-01-28 04:52:39,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-01-28 04:52:39,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4026 transitions. [2023-01-28 04:52:39,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41090018371096143 [2023-01-28 04:52:39,620 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4026 transitions. [2023-01-28 04:52:39,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4026 transitions. [2023-01-28 04:52:39,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:52:39,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4026 transitions. [2023-01-28 04:52:39,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 58.34782608695652) internal successors, (4026), 69 states have internal predecessors, (4026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:52:39,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 142.0) internal successors, (9940), 70 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:52:39,649 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 142.0) internal successors, (9940), 70 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:52:39,650 INFO L175 Difference]: Start difference. First operand has 409 places, 1280 transitions, 34018 flow. Second operand 69 states and 4026 transitions. [2023-01-28 04:52:39,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 2026 transitions, 54568 flow [2023-01-28 04:52:45,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 2026 transitions, 51668 flow, removed 1002 selfloop flow, removed 21 redundant places. [2023-01-28 04:52:45,981 INFO L231 Difference]: Finished difference. Result has 475 places, 1690 transitions, 47516 flow [2023-01-28 04:52:45,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=31894, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=798, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=47516, PETRI_PLACES=475, PETRI_TRANSITIONS=1690} [2023-01-28 04:52:45,982 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 455 predicate places. [2023-01-28 04:52:45,982 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 1690 transitions, 47516 flow [2023-01-28 04:52:45,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.78260869565217) internal successors, (1260), 23 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:52:45,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:52:45,983 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:52:45,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 04:52:46,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:52:46,187 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:52:46,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:52:46,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1936626857, now seen corresponding path program 17 times [2023-01-28 04:52:46,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:52:46,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201180326] [2023-01-28 04:52:46,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:52:46,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:52:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:52:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:52:46,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:52:46,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201180326] [2023-01-28 04:52:46,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201180326] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:52:46,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783189838] [2023-01-28 04:52:46,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:52:46,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:52:46,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:52:46,397 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:52:46,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 04:52:46,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 04:52:46,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:52:46,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 04:52:46,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:52:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:52:46,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:52:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:52:49,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783189838] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:52:49,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:52:49,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-01-28 04:52:49,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606014133] [2023-01-28 04:52:49,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:52:49,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 04:52:49,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:52:49,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 04:52:49,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2023-01-28 04:52:49,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-28 04:52:49,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 1690 transitions, 47516 flow. Second operand has 22 states, 22 states have (on average 54.77272727272727) internal successors, (1205), 22 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:52:49,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:52:49,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-28 04:52:49,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:52:57,509 INFO L130 PetriNetUnfolder]: 5721/11915 cut-off events. [2023-01-28 04:52:57,509 INFO L131 PetriNetUnfolder]: For 797478/797478 co-relation queries the response was YES. [2023-01-28 04:52:57,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140673 conditions, 11915 events. 5721/11915 cut-off events. For 797478/797478 co-relation queries the response was YES. Maximal size of possible extension queue 950. Compared 112108 event pairs, 266 based on Foata normal form. 118/12033 useless extension candidates. Maximal degree in co-relation 139057. Up to 2810 conditions per place. [2023-01-28 04:52:57,649 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 723 selfloop transitions, 1402 changer transitions 28/2153 dead transitions. [2023-01-28 04:52:57,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 2153 transitions, 63344 flow [2023-01-28 04:52:57,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-01-28 04:52:57,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-01-28 04:52:57,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2767 transitions. [2023-01-28 04:52:57,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41459394665867544 [2023-01-28 04:52:57,652 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2767 transitions. [2023-01-28 04:52:57,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2767 transitions. [2023-01-28 04:52:57,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:52:57,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2767 transitions. [2023-01-28 04:52:57,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 58.87234042553192) internal successors, (2767), 47 states have internal predecessors, (2767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:52:57,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 142.0) internal successors, (6816), 48 states have internal predecessors, (6816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:52:57,658 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 142.0) internal successors, (6816), 48 states have internal predecessors, (6816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:52:57,658 INFO L175 Difference]: Start difference. First operand has 475 places, 1690 transitions, 47516 flow. Second operand 47 states and 2767 transitions. [2023-01-28 04:52:57,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 2153 transitions, 63344 flow [2023-01-28 04:53:06,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 2153 transitions, 61697 flow, removed 658 selfloop flow, removed 32 redundant places. [2023-01-28 04:53:06,693 INFO L231 Difference]: Finished difference. Result has 506 places, 1944 transitions, 59102 flow [2023-01-28 04:53:06,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=46060, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=59102, PETRI_PLACES=506, PETRI_TRANSITIONS=1944} [2023-01-28 04:53:06,694 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 486 predicate places. [2023-01-28 04:53:06,695 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 1944 transitions, 59102 flow [2023-01-28 04:53:06,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.77272727272727) internal successors, (1205), 22 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:06,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:53:06,695 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:53:06,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-01-28 04:53:06,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:53:06,899 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:53:06,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:53:06,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1918400809, now seen corresponding path program 18 times [2023-01-28 04:53:06,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:53:06,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619048816] [2023-01-28 04:53:06,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:53:06,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:53:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:53:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:53:07,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:53:07,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619048816] [2023-01-28 04:53:07,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619048816] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:53:07,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599606390] [2023-01-28 04:53:07,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:53:07,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:53:07,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:53:07,074 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:53:07,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 04:53:07,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 04:53:07,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:53:07,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 04:53:07,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:53:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:53:07,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:53:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:53:07,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599606390] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:53:07,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:53:07,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-01-28 04:53:07,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158793742] [2023-01-28 04:53:07,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:53:07,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 04:53:07,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:53:07,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 04:53:07,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-01-28 04:53:07,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-28 04:53:07,513 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 1944 transitions, 59102 flow. Second operand has 20 states, 20 states have (on average 54.8) internal successors, (1096), 20 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:07,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:53:07,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-28 04:53:07,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:53:17,569 INFO L130 PetriNetUnfolder]: 6072/12597 cut-off events. [2023-01-28 04:53:17,569 INFO L131 PetriNetUnfolder]: For 928436/928436 co-relation queries the response was YES. [2023-01-28 04:53:17,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159738 conditions, 12597 events. 6072/12597 cut-off events. For 928436/928436 co-relation queries the response was YES. Maximal size of possible extension queue 1052. Compared 119172 event pairs, 905 based on Foata normal form. 102/12699 useless extension candidates. Maximal degree in co-relation 158672. Up to 9303 conditions per place. [2023-01-28 04:53:17,749 INFO L137 encePairwiseOnDemand]: 133/142 looper letters, 1853 selfloop transitions, 415 changer transitions 10/2278 dead transitions. [2023-01-28 04:53:17,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 2278 transitions, 71233 flow [2023-01-28 04:53:17,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-01-28 04:53:17,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-01-28 04:53:17,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2706 transitions. [2023-01-28 04:53:17,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142682180036742 [2023-01-28 04:53:17,752 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2706 transitions. [2023-01-28 04:53:17,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2706 transitions. [2023-01-28 04:53:17,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:53:17,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2706 transitions. [2023-01-28 04:53:17,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 58.82608695652174) internal successors, (2706), 46 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:17,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 142.0) internal successors, (6674), 47 states have internal predecessors, (6674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:17,757 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 142.0) internal successors, (6674), 47 states have internal predecessors, (6674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:17,757 INFO L175 Difference]: Start difference. First operand has 506 places, 1944 transitions, 59102 flow. Second operand 46 states and 2706 transitions. [2023-01-28 04:53:17,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 2278 transitions, 71233 flow [2023-01-28 04:53:32,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 2278 transitions, 66761 flow, removed 1894 selfloop flow, removed 19 redundant places. [2023-01-28 04:53:32,910 INFO L231 Difference]: Finished difference. Result has 549 places, 2047 transitions, 60082 flow [2023-01-28 04:53:32,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=55556, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1942, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=60082, PETRI_PLACES=549, PETRI_TRANSITIONS=2047} [2023-01-28 04:53:32,912 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 529 predicate places. [2023-01-28 04:53:32,912 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 2047 transitions, 60082 flow [2023-01-28 04:53:32,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.8) internal successors, (1096), 20 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:32,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:53:32,912 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:53:32,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-28 04:53:33,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:53:33,117 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:53:33,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:53:33,117 INFO L85 PathProgramCache]: Analyzing trace with hash 2080956109, now seen corresponding path program 19 times [2023-01-28 04:53:33,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:53:33,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696276745] [2023-01-28 04:53:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:53:33,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:53:33,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:53:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:53:33,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:53:33,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696276745] [2023-01-28 04:53:33,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696276745] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:53:33,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412554813] [2023-01-28 04:53:33,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:53:33,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:53:33,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:53:33,368 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:53:33,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 04:53:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:53:33,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 04:53:33,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:53:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:53:33,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:53:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:53:34,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412554813] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:53:34,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:53:34,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-01-28 04:53:34,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658811066] [2023-01-28 04:53:34,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:53:34,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 04:53:34,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:53:34,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 04:53:34,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-01-28 04:53:34,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-28 04:53:34,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 2047 transitions, 60082 flow. Second operand has 25 states, 25 states have (on average 54.88) internal successors, (1372), 25 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:34,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:53:34,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-28 04:53:34,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:53:48,804 INFO L130 PetriNetUnfolder]: 6940/14440 cut-off events. [2023-01-28 04:53:48,804 INFO L131 PetriNetUnfolder]: For 1079652/1079652 co-relation queries the response was YES. [2023-01-28 04:53:48,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176586 conditions, 14440 events. 6940/14440 cut-off events. For 1079652/1079652 co-relation queries the response was YES. Maximal size of possible extension queue 1182. Compared 140298 event pairs, 289 based on Foata normal form. 212/14652 useless extension candidates. Maximal degree in co-relation 175500. Up to 5175 conditions per place. [2023-01-28 04:53:49,009 INFO L137 encePairwiseOnDemand]: 133/142 looper letters, 896 selfloop transitions, 1563 changer transitions 96/2555 dead transitions. [2023-01-28 04:53:49,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 2555 transitions, 79180 flow [2023-01-28 04:53:49,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-28 04:53:49,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-28 04:53:49,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2452 transitions. [2023-01-28 04:53:49,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41113346747149565 [2023-01-28 04:53:49,012 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2452 transitions. [2023-01-28 04:53:49,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2452 transitions. [2023-01-28 04:53:49,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:53:49,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2452 transitions. [2023-01-28 04:53:49,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 58.38095238095238) internal successors, (2452), 42 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:49,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 142.0) internal successors, (6106), 43 states have internal predecessors, (6106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:49,017 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 142.0) internal successors, (6106), 43 states have internal predecessors, (6106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:49,017 INFO L175 Difference]: Start difference. First operand has 549 places, 2047 transitions, 60082 flow. Second operand 42 states and 2452 transitions. [2023-01-28 04:53:49,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 2555 transitions, 79180 flow [2023-01-28 04:54:05,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 573 places, 2555 transitions, 78610 flow, removed 239 selfloop flow, removed 17 redundant places. [2023-01-28 04:54:05,834 INFO L231 Difference]: Finished difference. Result has 590 places, 2299 transitions, 73995 flow [2023-01-28 04:54:05,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=59414, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2041, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=688, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=73995, PETRI_PLACES=590, PETRI_TRANSITIONS=2299} [2023-01-28 04:54:05,836 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 570 predicate places. [2023-01-28 04:54:05,836 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 2299 transitions, 73995 flow [2023-01-28 04:54:05,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.88) internal successors, (1372), 25 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:05,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:05,836 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:54:05,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-01-28 04:54:06,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-01-28 04:54:06,037 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:54:06,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:06,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1393150379, now seen corresponding path program 20 times [2023-01-28 04:54:06,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:06,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036095744] [2023-01-28 04:54:06,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:06,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:54:06,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:06,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036095744] [2023-01-28 04:54:06,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036095744] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:06,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691202173] [2023-01-28 04:54:06,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:54:06,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:06,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:06,281 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:54:06,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 04:54:06,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:54:06,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:54:06,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 04:54:06,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:54:06,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:06,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:54:06,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691202173] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:06,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:06,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-01-28 04:54:06,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907548645] [2023-01-28 04:54:06,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:06,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 04:54:06,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:06,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 04:54:06,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-01-28 04:54:06,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 142 [2023-01-28 04:54:06,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 2299 transitions, 73995 flow. Second operand has 20 states, 20 states have (on average 56.85) internal successors, (1137), 20 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:06,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:06,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 142 [2023-01-28 04:54:06,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:20,034 INFO L130 PetriNetUnfolder]: 6717/13877 cut-off events. [2023-01-28 04:54:20,035 INFO L131 PetriNetUnfolder]: For 1158219/1158219 co-relation queries the response was YES. [2023-01-28 04:54:20,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183259 conditions, 13877 events. 6717/13877 cut-off events. For 1158219/1158219 co-relation queries the response was YES. Maximal size of possible extension queue 1126. Compared 132743 event pairs, 401 based on Foata normal form. 40/13917 useless extension candidates. Maximal degree in co-relation 182080. Up to 5435 conditions per place. [2023-01-28 04:54:20,263 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 1202 selfloop transitions, 1261 changer transitions 19/2482 dead transitions. [2023-01-28 04:54:20,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 2482 transitions, 82202 flow [2023-01-28 04:54:20,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-28 04:54:20,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-28 04:54:20,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2404 transitions. [2023-01-28 04:54:20,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232394366197183 [2023-01-28 04:54:20,266 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2404 transitions. [2023-01-28 04:54:20,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2404 transitions. [2023-01-28 04:54:20,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:20,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2404 transitions. [2023-01-28 04:54:20,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 60.1) internal successors, (2404), 40 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:20,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 142.0) internal successors, (5822), 41 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:20,275 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 142.0) internal successors, (5822), 41 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:20,275 INFO L175 Difference]: Start difference. First operand has 590 places, 2299 transitions, 73995 flow. Second operand 40 states and 2404 transitions. [2023-01-28 04:54:20,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 2482 transitions, 82202 flow [2023-01-28 04:54:43,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 2482 transitions, 79710 flow, removed 1193 selfloop flow, removed 19 redundant places. [2023-01-28 04:54:43,818 INFO L231 Difference]: Finished difference. Result has 615 places, 2345 transitions, 76733 flow [2023-01-28 04:54:43,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=71509, PETRI_DIFFERENCE_MINUEND_PLACES=571, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1071, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=76733, PETRI_PLACES=615, PETRI_TRANSITIONS=2345} [2023-01-28 04:54:43,820 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 595 predicate places. [2023-01-28 04:54:43,820 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 2345 transitions, 76733 flow [2023-01-28 04:54:43,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.85) internal successors, (1137), 20 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:43,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:43,820 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:54:43,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-01-28 04:54:44,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-28 04:54:44,022 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:54:44,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:44,028 INFO L85 PathProgramCache]: Analyzing trace with hash 711617715, now seen corresponding path program 21 times [2023-01-28 04:54:44,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:44,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620574537] [2023-01-28 04:54:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:44,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:44,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:54:44,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:44,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620574537] [2023-01-28 04:54:44,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620574537] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:44,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310652781] [2023-01-28 04:54:44,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:54:44,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:44,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:44,249 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:54:44,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 04:54:44,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 04:54:44,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:54:44,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 04:54:44,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:54:44,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:54:44,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310652781] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:44,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:44,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2023-01-28 04:54:44,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712959220] [2023-01-28 04:54:44,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:44,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 04:54:44,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:44,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 04:54:44,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2023-01-28 04:54:44,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-28 04:54:44,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 2345 transitions, 76733 flow. Second operand has 20 states, 20 states have (on average 54.6) internal successors, (1092), 20 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:44,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:44,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-28 04:54:44,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:56,821 INFO L130 PetriNetUnfolder]: 6741/13915 cut-off events. [2023-01-28 04:54:56,821 INFO L131 PetriNetUnfolder]: For 1200029/1200029 co-relation queries the response was YES. [2023-01-28 04:54:56,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185873 conditions, 13915 events. 6741/13915 cut-off events. For 1200029/1200029 co-relation queries the response was YES. Maximal size of possible extension queue 1125. Compared 133026 event pairs, 789 based on Foata normal form. 24/13939 useless extension candidates. Maximal degree in co-relation 185675. Up to 4809 conditions per place. [2023-01-28 04:54:57,037 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 1233 selfloop transitions, 1189 changer transitions 5/2427 dead transitions. [2023-01-28 04:54:57,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 638 places, 2427 transitions, 83128 flow [2023-01-28 04:54:57,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 04:54:57,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 04:54:57,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1497 transitions. [2023-01-28 04:54:57,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054712892741062 [2023-01-28 04:54:57,039 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1497 transitions. [2023-01-28 04:54:57,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1497 transitions. [2023-01-28 04:54:57,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:57,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1497 transitions. [2023-01-28 04:54:57,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 57.57692307692308) internal successors, (1497), 26 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:57,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 142.0) internal successors, (3834), 27 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:57,043 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 142.0) internal successors, (3834), 27 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:57,043 INFO L175 Difference]: Start difference. First operand has 615 places, 2345 transitions, 76733 flow. Second operand 26 states and 1497 transitions. [2023-01-28 04:54:57,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 638 places, 2427 transitions, 83128 flow [2023-01-28 04:55:21,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 2427 transitions, 82642 flow, removed 160 selfloop flow, removed 21 redundant places. [2023-01-28 04:55:21,522 INFO L231 Difference]: Finished difference. Result has 619 places, 2328 transitions, 78448 flow [2023-01-28 04:55:21,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=75660, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=78448, PETRI_PLACES=619, PETRI_TRANSITIONS=2328} [2023-01-28 04:55:21,524 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 599 predicate places. [2023-01-28 04:55:21,524 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 2328 transitions, 78448 flow [2023-01-28 04:55:21,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.6) internal successors, (1092), 20 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:55:21,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:55:21,524 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:55:21,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-28 04:55:21,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:55:21,729 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:55:21,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:55:21,729 INFO L85 PathProgramCache]: Analyzing trace with hash 876522855, now seen corresponding path program 22 times [2023-01-28 04:55:21,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:55:21,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180819346] [2023-01-28 04:55:21,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:55:21,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:55:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:55:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:55:21,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:55:21,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180819346] [2023-01-28 04:55:21,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180819346] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:55:21,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091010604] [2023-01-28 04:55:21,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:55:21,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:55:21,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:55:21,915 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:55:21,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 04:55:21,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:55:21,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:55:21,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 04:55:21,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:55:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:55:22,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:55:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:55:47,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091010604] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:55:47,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:55:47,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-01-28 04:55:47,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655934481] [2023-01-28 04:55:47,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:55:47,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 04:55:47,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:55:47,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 04:55:47,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-01-28 04:55:47,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-28 04:55:47,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 2328 transitions, 78448 flow. Second operand has 20 states, 20 states have (on average 54.8) internal successors, (1096), 20 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:55:47,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:55:47,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-28 04:55:47,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:56:03,042 INFO L130 PetriNetUnfolder]: 6992/14420 cut-off events. [2023-01-28 04:56:03,042 INFO L131 PetriNetUnfolder]: For 1258688/1258688 co-relation queries the response was YES. [2023-01-28 04:56:03,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195907 conditions, 14420 events. 6992/14420 cut-off events. For 1258688/1258688 co-relation queries the response was YES. Maximal size of possible extension queue 1186. Compared 138458 event pairs, 2074 based on Foata normal form. 148/14568 useless extension candidates. Maximal degree in co-relation 195708. Up to 10225 conditions per place. [2023-01-28 04:56:03,273 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 2168 selfloop transitions, 428 changer transitions 4/2600 dead transitions. [2023-01-28 04:56:03,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 656 places, 2600 transitions, 89694 flow [2023-01-28 04:56:03,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-28 04:56:03,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-28 04:56:03,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2353 transitions. [2023-01-28 04:56:03,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41426056338028167 [2023-01-28 04:56:03,276 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2353 transitions. [2023-01-28 04:56:03,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2353 transitions. [2023-01-28 04:56:03,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:56:03,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2353 transitions. [2023-01-28 04:56:03,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 58.825) internal successors, (2353), 40 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:03,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 142.0) internal successors, (5822), 41 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:03,293 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 142.0) internal successors, (5822), 41 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:03,293 INFO L175 Difference]: Start difference. First operand has 619 places, 2328 transitions, 78448 flow. Second operand 40 states and 2353 transitions. [2023-01-28 04:56:03,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 656 places, 2600 transitions, 89694 flow [2023-01-28 04:56:28,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 2600 transitions, 88893 flow, removed 73 selfloop flow, removed 15 redundant places. [2023-01-28 04:56:28,238 INFO L231 Difference]: Finished difference. Result has 656 places, 2424 transitions, 82753 flow [2023-01-28 04:56:28,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=77454, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1929, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=82753, PETRI_PLACES=656, PETRI_TRANSITIONS=2424} [2023-01-28 04:56:28,239 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 636 predicate places. [2023-01-28 04:56:28,239 INFO L495 AbstractCegarLoop]: Abstraction has has 656 places, 2424 transitions, 82753 flow [2023-01-28 04:56:28,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.8) internal successors, (1096), 20 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:28,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:56:28,240 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:56:28,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-28 04:56:28,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:56:28,445 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:56:28,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:56:28,445 INFO L85 PathProgramCache]: Analyzing trace with hash 667350761, now seen corresponding path program 23 times [2023-01-28 04:56:28,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:56:28,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894279971] [2023-01-28 04:56:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:56:28,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:56:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:56:28,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:56:28,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:56:28,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894279971] [2023-01-28 04:56:28,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894279971] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:56:28,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877354723] [2023-01-28 04:56:28,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:56:28,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:56:28,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:56:28,702 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:56:28,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 04:56:28,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 04:56:28,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:56:28,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 04:56:28,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:56:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:56:28,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:56:54,364 WARN L222 SmtUtils]: Spent 23.71s on a formula simplification. DAG size of input: 1593 DAG size of output: 1588 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Received shutdown request... [2023-01-28 05:04:23,171 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 05:04:23,171 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 05:04:24,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2023-01-28 05:04:24,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown