/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-sum-array-hom.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 04:58:03,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 04:58:03,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 04:58:03,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 04:58:03,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 04:58:03,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 04:58:03,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 04:58:03,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 04:58:03,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 04:58:03,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 04:58:03,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 04:58:03,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 04:58:03,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 04:58:03,108 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 04:58:03,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 04:58:03,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 04:58:03,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 04:58:03,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 04:58:03,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 04:58:03,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 04:58:03,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 04:58:03,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 04:58:03,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 04:58:03,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 04:58:03,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 04:58:03,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 04:58:03,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 04:58:03,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 04:58:03,134 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 04:58:03,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 04:58:03,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 04:58:03,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 04:58:03,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 04:58:03,136 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 04:58:03,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 04:58:03,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 04:58:03,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 04:58:03,137 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 04:58:03,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 04:58:03,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 04:58:03,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 04:58:03,141 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 04:58:03,171 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 04:58:03,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 04:58:03,172 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 04:58:03,172 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 04:58:03,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 04:58:03,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 04:58:03,173 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 04:58:03,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 04:58:03,173 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 04:58:03,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 04:58:03,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 04:58:03,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 04:58:03,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 04:58:03,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 04:58:03,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 04:58:03,176 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 04:58:03,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 04:58:03,176 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 04:58:03,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 04:58:03,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 04:58:03,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 04:58:03,176 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 04:58:03,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 04:58:03,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 04:58:03,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 04:58:03,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 04:58:03,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 04:58:03,177 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 04:58:03,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 04:58:03,177 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 04:58:03,177 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 04:58:03,177 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 04:58:03,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 04:58:03,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 04:58:03,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 04:58:03,394 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 04:58:03,395 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 04:58:03,396 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c [2023-01-28 04:58:04,508 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 04:58:04,677 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 04:58:04,677 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c [2023-01-28 04:58:04,683 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df22b6d37/1d0e27583f704d01916718029273fffe/FLAG926feff4f [2023-01-28 04:58:04,693 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df22b6d37/1d0e27583f704d01916718029273fffe [2023-01-28 04:58:04,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 04:58:04,697 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 04:58:04,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 04:58:04,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 04:58:04,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 04:58:04,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 04:58:04" (1/1) ... [2023-01-28 04:58:04,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66e6acd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:58:04, skipping insertion in model container [2023-01-28 04:58:04,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 04:58:04" (1/1) ... [2023-01-28 04:58:04,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 04:58:04,720 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 04:58:04,878 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-sum-array-hom.wvr.c[2396,2409] [2023-01-28 04:58:04,884 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 04:58:04,891 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 04:58:04,911 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-sum-array-hom.wvr.c[2396,2409] [2023-01-28 04:58:04,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 04:58:04,925 INFO L208 MainTranslator]: Completed translation [2023-01-28 04:58:04,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:58:04 WrapperNode [2023-01-28 04:58:04,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 04:58:04,927 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 04:58:04,927 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 04:58:04,927 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 04:58:04,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:58:04" (1/1) ... [2023-01-28 04:58:04,939 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:58:04" (1/1) ... [2023-01-28 04:58:04,956 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2023-01-28 04:58:04,956 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 04:58:04,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 04:58:04,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 04:58:04,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 04:58:04,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:58:04" (1/1) ... [2023-01-28 04:58:04,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:58:04" (1/1) ... [2023-01-28 04:58:04,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:58:04" (1/1) ... [2023-01-28 04:58:04,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:58:04" (1/1) ... [2023-01-28 04:58:04,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:58:04" (1/1) ... [2023-01-28 04:58:04,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:58:04" (1/1) ... [2023-01-28 04:58:04,979 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:58:04" (1/1) ... [2023-01-28 04:58:04,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:58:04" (1/1) ... [2023-01-28 04:58:04,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 04:58:04,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 04:58:04,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 04:58:04,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 04:58:04,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:58:04" (1/1) ... [2023-01-28 04:58:04,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 04:58:04,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:58:05,009 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 04:58:05,033 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 04:58:05,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 04:58:05,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 04:58:05,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 04:58:05,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 04:58:05,058 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 04:58:05,058 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 04:58:05,059 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 04:58:05,059 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 04:58:05,059 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-28 04:58:05,059 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-28 04:58:05,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 04:58:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 04:58:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 04:58:05,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 04:58:05,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 04:58:05,061 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 04:58:05,174 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 04:58:05,176 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 04:58:05,487 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 04:58:05,494 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 04:58:05,496 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-01-28 04:58:05,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 04:58:05 BoogieIcfgContainer [2023-01-28 04:58:05,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 04:58:05,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 04:58:05,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 04:58:05,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 04:58:05,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 04:58:04" (1/3) ... [2023-01-28 04:58:05,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@536428be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 04:58:05, skipping insertion in model container [2023-01-28 04:58:05,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:58:04" (2/3) ... [2023-01-28 04:58:05,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@536428be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 04:58:05, skipping insertion in model container [2023-01-28 04:58:05,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 04:58:05" (3/3) ... [2023-01-28 04:58:05,514 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2023-01-28 04:58:05,528 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 04:58:05,528 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 04:58:05,528 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 04:58:05,614 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 04:58:05,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 151 transitions, 326 flow [2023-01-28 04:58:05,722 INFO L130 PetriNetUnfolder]: 12/148 cut-off events. [2023-01-28 04:58:05,722 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 04:58:05,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 148 events. 12/148 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 102 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2023-01-28 04:58:05,728 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 151 transitions, 326 flow [2023-01-28 04:58:05,732 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 138 transitions, 294 flow [2023-01-28 04:58:05,738 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 04:58:05,745 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 138 transitions, 294 flow [2023-01-28 04:58:05,747 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 138 transitions, 294 flow [2023-01-28 04:58:05,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 138 transitions, 294 flow [2023-01-28 04:58:05,797 INFO L130 PetriNetUnfolder]: 12/138 cut-off events. [2023-01-28 04:58:05,797 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 04:58:05,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 138 events. 12/138 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 101 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2023-01-28 04:58:05,800 INFO L119 LiptonReduction]: Number of co-enabled transitions 1728 [2023-01-28 04:58:09,860 INFO L134 LiptonReduction]: Checked pairs total: 1910 [2023-01-28 04:58:09,861 INFO L136 LiptonReduction]: Total number of compositions: 130 [2023-01-28 04:58:09,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 04:58:09,879 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;@42bc0dd7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 04:58:09,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 04:58:09,885 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2023-01-28 04:58:09,886 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 04:58:09,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:09,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:58:09,887 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:58:09,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:09,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1930366028, now seen corresponding path program 1 times [2023-01-28 04:58:09,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:09,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368909767] [2023-01-28 04:58:09,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:09,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:10,553 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 04:58:10,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:10,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368909767] [2023-01-28 04:58:10,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368909767] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:58:10,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:58:10,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 04:58:10,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599087114] [2023-01-28 04:58:10,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:58:10,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 04:58:10,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:10,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 04:58:10,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 04:58:10,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 281 [2023-01-28 04:58:10,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 04:58:10,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:10,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 281 [2023-01-28 04:58:10,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:10,717 INFO L130 PetriNetUnfolder]: 360/508 cut-off events. [2023-01-28 04:58:10,718 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2023-01-28 04:58:10,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 508 events. 360/508 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1620 event pairs, 39 based on Foata normal form. 1/309 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2023-01-28 04:58:10,727 INFO L137 encePairwiseOnDemand]: 276/281 looper letters, 32 selfloop transitions, 4 changer transitions 1/40 dead transitions. [2023-01-28 04:58:10,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 187 flow [2023-01-28 04:58:10,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 04:58:10,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 04:58:10,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2023-01-28 04:58:10,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041518386714117 [2023-01-28 04:58:10,748 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2023-01-28 04:58:10,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2023-01-28 04:58:10,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:10,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2023-01-28 04:58:10,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states 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 04:58:10,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states 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 04:58:10,769 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states 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 04:58:10,770 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 425 transitions. [2023-01-28 04:58:10,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 40 transitions, 187 flow [2023-01-28 04:58:10,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 40 transitions, 165 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-28 04:58:10,776 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2023-01-28 04:58:10,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-01-28 04:58:10,781 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-01-28 04:58:10,782 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2023-01-28 04:58:10,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 04:58:10,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:10,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:58:10,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 04:58:10,783 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:58:10,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:10,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1470342661, now seen corresponding path program 1 times [2023-01-28 04:58:10,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:10,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176764754] [2023-01-28 04:58:10,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:10,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:10,881 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 04:58:10,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:10,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176764754] [2023-01-28 04:58:10,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176764754] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:58:10,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:58:10,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 04:58:10,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506176761] [2023-01-28 04:58:10,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:58:10,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 04:58:10,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:10,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 04:58:10,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 04:58:10,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 281 [2023-01-28 04:58:10,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 116.8) internal successors, (584), 5 states have internal predecessors, (584), 0 states have call successors, (0), 0 states 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 04:58:10,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:10,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 281 [2023-01-28 04:58:10,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:11,068 INFO L130 PetriNetUnfolder]: 624/931 cut-off events. [2023-01-28 04:58:11,069 INFO L131 PetriNetUnfolder]: For 263/266 co-relation queries the response was YES. [2023-01-28 04:58:11,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2277 conditions, 931 events. 624/931 cut-off events. For 263/266 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3758 event pairs, 274 based on Foata normal form. 34/956 useless extension candidates. Maximal degree in co-relation 487. Up to 484 conditions per place. [2023-01-28 04:58:11,075 INFO L137 encePairwiseOnDemand]: 276/281 looper letters, 54 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-01-28 04:58:11,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 60 transitions, 292 flow [2023-01-28 04:58:11,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 04:58:11,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 04:58:11,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 617 transitions. [2023-01-28 04:58:11,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4391459074733096 [2023-01-28 04:58:11,078 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 617 transitions. [2023-01-28 04:58:11,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 617 transitions. [2023-01-28 04:58:11,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:11,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 617 transitions. [2023-01-28 04:58:11,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.4) internal successors, (617), 5 states have internal predecessors, (617), 0 states have call successors, (0), 0 states 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 04:58:11,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states 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 04:58:11,084 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states 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 04:58:11,084 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 5 states and 617 transitions. [2023-01-28 04:58:11,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 60 transitions, 292 flow [2023-01-28 04:58:11,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 60 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 04:58:11,088 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 106 flow [2023-01-28 04:58:11,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-01-28 04:58:11,089 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-01-28 04:58:11,089 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 106 flow [2023-01-28 04:58:11,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.8) internal successors, (584), 5 states have internal predecessors, (584), 0 states have call successors, (0), 0 states 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 04:58:11,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:11,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:58:11,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 04:58:11,090 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:58:11,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:11,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1089877853, now seen corresponding path program 1 times [2023-01-28 04:58:11,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:11,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820561844] [2023-01-28 04:58:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:11,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:11,294 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 04:58:11,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:11,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820561844] [2023-01-28 04:58:11,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820561844] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:58:11,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:58:11,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 04:58:11,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699966653] [2023-01-28 04:58:11,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:58:11,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 04:58:11,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:11,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 04:58:11,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 04:58:11,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 281 [2023-01-28 04:58:11,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 04:58:11,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:11,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 281 [2023-01-28 04:58:11,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:11,448 INFO L130 PetriNetUnfolder]: 567/867 cut-off events. [2023-01-28 04:58:11,448 INFO L131 PetriNetUnfolder]: For 372/408 co-relation queries the response was YES. [2023-01-28 04:58:11,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2062 conditions, 867 events. 567/867 cut-off events. For 372/408 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3531 event pairs, 260 based on Foata normal form. 70/935 useless extension candidates. Maximal degree in co-relation 1398. Up to 568 conditions per place. [2023-01-28 04:58:11,454 INFO L137 encePairwiseOnDemand]: 276/281 looper letters, 53 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2023-01-28 04:58:11,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 59 transitions, 296 flow [2023-01-28 04:58:11,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 04:58:11,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 04:58:11,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 593 transitions. [2023-01-28 04:58:11,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4220640569395018 [2023-01-28 04:58:11,456 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 593 transitions. [2023-01-28 04:58:11,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 593 transitions. [2023-01-28 04:58:11,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:11,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 593 transitions. [2023-01-28 04:58:11,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.6) internal successors, (593), 5 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:11,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states 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 04:58:11,461 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states 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 04:58:11,461 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 106 flow. Second operand 5 states and 593 transitions. [2023-01-28 04:58:11,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 59 transitions, 296 flow [2023-01-28 04:58:11,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 59 transitions, 292 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 04:58:11,463 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 121 flow [2023-01-28 04:58:11,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2023-01-28 04:58:11,464 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-01-28 04:58:11,464 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 121 flow [2023-01-28 04:58:11,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 0 states have call successors, (0), 0 states 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 04:58:11,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:11,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:58:11,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 04:58:11,465 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:58:11,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:11,466 INFO L85 PathProgramCache]: Analyzing trace with hash -342971254, now seen corresponding path program 1 times [2023-01-28 04:58:11,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:11,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696474925] [2023-01-28 04:58:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:11,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:11,628 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 04:58:11,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:11,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696474925] [2023-01-28 04:58:11,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696474925] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:58:11,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:58:11,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 04:58:11,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515327549] [2023-01-28 04:58:11,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:58:11,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 04:58:11,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:11,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 04:58:11,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 04:58:11,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 281 [2023-01-28 04:58:11,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 112.8) internal successors, (564), 5 states have internal predecessors, (564), 0 states have call successors, (0), 0 states 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 04:58:11,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:11,634 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 281 [2023-01-28 04:58:11,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:11,773 INFO L130 PetriNetUnfolder]: 417/635 cut-off events. [2023-01-28 04:58:11,773 INFO L131 PetriNetUnfolder]: For 446/480 co-relation queries the response was YES. [2023-01-28 04:58:11,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1634 conditions, 635 events. 417/635 cut-off events. For 446/480 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2524 event pairs, 138 based on Foata normal form. 48/671 useless extension candidates. Maximal degree in co-relation 1372. Up to 368 conditions per place. [2023-01-28 04:58:11,778 INFO L137 encePairwiseOnDemand]: 275/281 looper letters, 34 selfloop transitions, 3 changer transitions 25/64 dead transitions. [2023-01-28 04:58:11,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 64 transitions, 333 flow [2023-01-28 04:58:11,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 04:58:11,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 04:58:11,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 710 transitions. [2023-01-28 04:58:11,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4211150652431791 [2023-01-28 04:58:11,781 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 710 transitions. [2023-01-28 04:58:11,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 710 transitions. [2023-01-28 04:58:11,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:11,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 710 transitions. [2023-01-28 04:58:11,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 118.33333333333333) internal successors, (710), 6 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 04:58:11,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 281.0) internal successors, (1967), 7 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states 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 04:58:11,791 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 281.0) internal successors, (1967), 7 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states 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 04:58:11,791 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 121 flow. Second operand 6 states and 710 transitions. [2023-01-28 04:58:11,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 64 transitions, 333 flow [2023-01-28 04:58:11,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 64 transitions, 320 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-28 04:58:11,796 INFO L231 Difference]: Finished difference. Result has 43 places, 28 transitions, 102 flow [2023-01-28 04:58:11,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=28} [2023-01-28 04:58:11,797 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2023-01-28 04:58:11,797 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 28 transitions, 102 flow [2023-01-28 04:58:11,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.8) internal successors, (564), 5 states have internal predecessors, (564), 0 states have call successors, (0), 0 states 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 04:58:11,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:11,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:58:11,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 04:58:11,798 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:58:11,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:11,798 INFO L85 PathProgramCache]: Analyzing trace with hash 569730806, now seen corresponding path program 1 times [2023-01-28 04:58:11,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:11,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351726533] [2023-01-28 04:58:11,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:11,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:11,923 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 04:58:11,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:11,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351726533] [2023-01-28 04:58:11,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351726533] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:11,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796378262] [2023-01-28 04:58:11,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:11,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:11,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:58:11,929 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 04:58:11,937 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 04:58:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:12,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:58:12,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:58:12,137 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 04:58:12,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:58:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:58:12,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796378262] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:12,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 04:58:12,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-01-28 04:58:12,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863084973] [2023-01-28 04:58:12,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:58:12,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 04:58:12,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:12,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 04:58:12,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-01-28 04:58:12,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 281 [2023-01-28 04:58:12,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 28 transitions, 102 flow. Second operand has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:12,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:12,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 281 [2023-01-28 04:58:12,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:12,376 INFO L130 PetriNetUnfolder]: 544/799 cut-off events. [2023-01-28 04:58:12,376 INFO L131 PetriNetUnfolder]: For 468/468 co-relation queries the response was YES. [2023-01-28 04:58:12,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2146 conditions, 799 events. 544/799 cut-off events. For 468/468 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3028 event pairs, 139 based on Foata normal form. 16/814 useless extension candidates. Maximal degree in co-relation 2121. Up to 410 conditions per place. [2023-01-28 04:58:12,381 INFO L137 encePairwiseOnDemand]: 273/281 looper letters, 58 selfloop transitions, 9 changer transitions 0/68 dead transitions. [2023-01-28 04:58:12,381 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 68 transitions, 372 flow [2023-01-28 04:58:12,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:58:12,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:58:12,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 794 transitions. [2023-01-28 04:58:12,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4036603965429588 [2023-01-28 04:58:12,384 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 794 transitions. [2023-01-28 04:58:12,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 794 transitions. [2023-01-28 04:58:12,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:12,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 794 transitions. [2023-01-28 04:58:12,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 113.42857142857143) internal successors, (794), 7 states have internal predecessors, (794), 0 states have call successors, (0), 0 states 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 04:58:12,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 281.0) internal successors, (2248), 8 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 04:58:12,389 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 281.0) internal successors, (2248), 8 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 04:58:12,389 INFO L175 Difference]: Start difference. First operand has 43 places, 28 transitions, 102 flow. Second operand 7 states and 794 transitions. [2023-01-28 04:58:12,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 68 transitions, 372 flow [2023-01-28 04:58:12,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 68 transitions, 337 flow, removed 14 selfloop flow, removed 8 redundant places. [2023-01-28 04:58:12,393 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 142 flow [2023-01-28 04:58:12,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=142, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-01-28 04:58:12,394 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-01-28 04:58:12,394 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 142 flow [2023-01-28 04:58:12,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:12,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:12,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:58:12,405 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 04:58:12,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:12,600 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:58:12,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:12,601 INFO L85 PathProgramCache]: Analyzing trace with hash 379073552, now seen corresponding path program 2 times [2023-01-28 04:58:12,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:12,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20514562] [2023-01-28 04:58:12,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:12,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:12,714 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 04:58:12,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:12,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20514562] [2023-01-28 04:58:12,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20514562] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:12,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535872380] [2023-01-28 04:58:12,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:58:12,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:12,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:58:12,716 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 04:58:12,746 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 04:58:12,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:58:12,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:58:12,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:58:12,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:58:12,893 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 04:58:12,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:58:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:58:12,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535872380] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:12,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 04:58:12,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-01-28 04:58:12,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669169588] [2023-01-28 04:58:12,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:58:12,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 04:58:12,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:12,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 04:58:12,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-01-28 04:58:12,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 281 [2023-01-28 04:58:12,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 142 flow. Second operand has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:12,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:12,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 281 [2023-01-28 04:58:12,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:13,148 INFO L130 PetriNetUnfolder]: 736/1083 cut-off events. [2023-01-28 04:58:13,148 INFO L131 PetriNetUnfolder]: For 1058/1058 co-relation queries the response was YES. [2023-01-28 04:58:13,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3402 conditions, 1083 events. 736/1083 cut-off events. For 1058/1058 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4405 event pairs, 221 based on Foata normal form. 12/1092 useless extension candidates. Maximal degree in co-relation 3380. Up to 648 conditions per place. [2023-01-28 04:58:13,155 INFO L137 encePairwiseOnDemand]: 273/281 looper letters, 60 selfloop transitions, 12 changer transitions 0/73 dead transitions. [2023-01-28 04:58:13,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 73 transitions, 449 flow [2023-01-28 04:58:13,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:58:13,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:58:13,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 790 transitions. [2023-01-28 04:58:13,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4016268429079817 [2023-01-28 04:58:13,159 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 790 transitions. [2023-01-28 04:58:13,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 790 transitions. [2023-01-28 04:58:13,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:13,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 790 transitions. [2023-01-28 04:58:13,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 112.85714285714286) internal successors, (790), 7 states have internal predecessors, (790), 0 states have call successors, (0), 0 states 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 04:58:13,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 281.0) internal successors, (2248), 8 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 04:58:13,165 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 281.0) internal successors, (2248), 8 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 04:58:13,165 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 142 flow. Second operand 7 states and 790 transitions. [2023-01-28 04:58:13,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 73 transitions, 449 flow [2023-01-28 04:58:13,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 73 transitions, 414 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-01-28 04:58:13,168 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 200 flow [2023-01-28 04:58:13,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=200, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-01-28 04:58:13,170 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2023-01-28 04:58:13,171 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 200 flow [2023-01-28 04:58:13,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:13,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:13,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:58:13,180 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 04:58:13,377 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,SelfDestructingSolverStorable5 [2023-01-28 04:58:13,378 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:58:13,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:13,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1858799492, now seen corresponding path program 3 times [2023-01-28 04:58:13,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:13,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367621767] [2023-01-28 04:58:13,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:13,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:13,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:13,540 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 04:58:13,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:13,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367621767] [2023-01-28 04:58:13,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367621767] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:13,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824159665] [2023-01-28 04:58:13,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:58:13,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:13,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:58:13,542 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 04:58:13,565 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 04:58:13,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:58:13,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:58:13,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:58:13,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:58:13,725 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 04:58:13,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:58:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:58:13,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824159665] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:13,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 04:58:13,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2023-01-28 04:58:13,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446541295] [2023-01-28 04:58:13,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:58:13,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 04:58:13,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:13,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 04:58:13,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-01-28 04:58:13,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 281 [2023-01-28 04:58:13,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:13,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:13,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 281 [2023-01-28 04:58:13,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:14,015 INFO L130 PetriNetUnfolder]: 840/1246 cut-off events. [2023-01-28 04:58:14,016 INFO L131 PetriNetUnfolder]: For 2256/2256 co-relation queries the response was YES. [2023-01-28 04:58:14,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4494 conditions, 1246 events. 840/1246 cut-off events. For 2256/2256 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5295 event pairs, 211 based on Foata normal form. 16/1259 useless extension candidates. Maximal degree in co-relation 4469. Up to 612 conditions per place. [2023-01-28 04:58:14,024 INFO L137 encePairwiseOnDemand]: 273/281 looper letters, 62 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2023-01-28 04:58:14,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 82 transitions, 561 flow [2023-01-28 04:58:14,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:58:14,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:58:14,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 797 transitions. [2023-01-28 04:58:14,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051855617691917 [2023-01-28 04:58:14,027 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 797 transitions. [2023-01-28 04:58:14,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 797 transitions. [2023-01-28 04:58:14,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:14,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 797 transitions. [2023-01-28 04:58:14,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 113.85714285714286) internal successors, (797), 7 states have internal predecessors, (797), 0 states have call successors, (0), 0 states 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 04:58:14,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 281.0) internal successors, (2248), 8 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 04:58:14,032 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 281.0) internal successors, (2248), 8 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 04:58:14,032 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 200 flow. Second operand 7 states and 797 transitions. [2023-01-28 04:58:14,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 82 transitions, 561 flow [2023-01-28 04:58:14,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 82 transitions, 520 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-01-28 04:58:14,039 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 310 flow [2023-01-28 04:58:14,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=310, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-01-28 04:58:14,040 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2023-01-28 04:58:14,040 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 310 flow [2023-01-28 04:58:14,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:14,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:14,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:58:14,049 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 04:58:14,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:14,247 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:58:14,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:14,247 INFO L85 PathProgramCache]: Analyzing trace with hash 259393698, now seen corresponding path program 4 times [2023-01-28 04:58:14,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:14,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319428438] [2023-01-28 04:58:14,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:14,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:14,344 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 04:58:14,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:14,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319428438] [2023-01-28 04:58:14,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319428438] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:14,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238332897] [2023-01-28 04:58:14,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:58:14,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:14,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:58:14,346 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 04:58:14,355 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 04:58:14,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:58:14,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:58:14,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:58:14,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:58:14,496 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 04:58:14,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:58:14,564 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 04:58:14,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238332897] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:58:14,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:58:14,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2023-01-28 04:58:14,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954276071] [2023-01-28 04:58:14,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:58:14,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 04:58:14,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:14,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 04:58:14,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-01-28 04:58:14,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 281 [2023-01-28 04:58:14,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 310 flow. Second operand has 13 states, 13 states have (on average 104.15384615384616) internal successors, (1354), 13 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:14,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:14,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 281 [2023-01-28 04:58:14,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:14,916 INFO L130 PetriNetUnfolder]: 869/1312 cut-off events. [2023-01-28 04:58:14,916 INFO L131 PetriNetUnfolder]: For 3825/3825 co-relation queries the response was YES. [2023-01-28 04:58:14,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5202 conditions, 1312 events. 869/1312 cut-off events. For 3825/3825 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5376 event pairs, 30 based on Foata normal form. 18/1329 useless extension candidates. Maximal degree in co-relation 5174. Up to 590 conditions per place. [2023-01-28 04:58:14,924 INFO L137 encePairwiseOnDemand]: 272/281 looper letters, 80 selfloop transitions, 43 changer transitions 0/123 dead transitions. [2023-01-28 04:58:14,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 123 transitions, 1016 flow [2023-01-28 04:58:14,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 04:58:14,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 04:58:14,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1198 transitions. [2023-01-28 04:58:14,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875768359754125 [2023-01-28 04:58:14,927 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1198 transitions. [2023-01-28 04:58:14,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1198 transitions. [2023-01-28 04:58:14,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:14,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1198 transitions. [2023-01-28 04:58:14,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 108.9090909090909) internal successors, (1198), 11 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states 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 04:58:14,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 281.0) internal successors, (3372), 12 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states 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 04:58:14,934 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 281.0) internal successors, (3372), 12 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states 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 04:58:14,935 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 310 flow. Second operand 11 states and 1198 transitions. [2023-01-28 04:58:14,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 123 transitions, 1016 flow [2023-01-28 04:58:14,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 123 transitions, 977 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-01-28 04:58:14,943 INFO L231 Difference]: Finished difference. Result has 63 places, 72 transitions, 673 flow [2023-01-28 04:58:14,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=673, PETRI_PLACES=63, PETRI_TRANSITIONS=72} [2023-01-28 04:58:14,944 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2023-01-28 04:58:14,944 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 72 transitions, 673 flow [2023-01-28 04:58:14,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 104.15384615384616) internal successors, (1354), 13 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:14,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:14,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:58:14,952 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 04:58:15,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:15,150 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:58:15,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:15,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1895829148, now seen corresponding path program 5 times [2023-01-28 04:58:15,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:15,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305880913] [2023-01-28 04:58:15,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:15,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:15,244 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 04:58:15,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:15,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305880913] [2023-01-28 04:58:15,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305880913] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:15,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556602758] [2023-01-28 04:58:15,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:58:15,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:15,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:58:15,246 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 04:58:15,270 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 04:58:15,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:58:15,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:58:15,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:58:15,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:58:15,401 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 04:58:15,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:58:15,464 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 04:58:15,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556602758] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:58:15,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:58:15,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-01-28 04:58:15,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23843585] [2023-01-28 04:58:15,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:58:15,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 04:58:15,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:15,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 04:58:15,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-01-28 04:58:15,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 281 [2023-01-28 04:58:15,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 72 transitions, 673 flow. Second operand has 16 states, 16 states have (on average 104.0) internal successors, (1664), 16 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states 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 04:58:15,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:15,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 281 [2023-01-28 04:58:15,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:15,939 INFO L130 PetriNetUnfolder]: 1230/1853 cut-off events. [2023-01-28 04:58:15,939 INFO L131 PetriNetUnfolder]: For 8979/8979 co-relation queries the response was YES. [2023-01-28 04:58:15,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8613 conditions, 1853 events. 1230/1853 cut-off events. For 8979/8979 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 8092 event pairs, 194 based on Foata normal form. 26/1878 useless extension candidates. Maximal degree in co-relation 8579. Up to 713 conditions per place. [2023-01-28 04:58:15,956 INFO L137 encePairwiseOnDemand]: 271/281 looper letters, 102 selfloop transitions, 60 changer transitions 0/162 dead transitions. [2023-01-28 04:58:15,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 162 transitions, 1547 flow [2023-01-28 04:58:15,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 04:58:15,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 04:58:15,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1106 transitions. [2023-01-28 04:58:15,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39359430604982204 [2023-01-28 04:58:15,960 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1106 transitions. [2023-01-28 04:58:15,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1106 transitions. [2023-01-28 04:58:15,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:15,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1106 transitions. [2023-01-28 04:58:15,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 110.6) internal successors, (1106), 10 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states 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 04:58:15,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 281.0) internal successors, (3091), 11 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states 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 04:58:15,967 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 281.0) internal successors, (3091), 11 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states 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 04:58:15,967 INFO L175 Difference]: Start difference. First operand has 63 places, 72 transitions, 673 flow. Second operand 10 states and 1106 transitions. [2023-01-28 04:58:15,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 162 transitions, 1547 flow [2023-01-28 04:58:15,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 162 transitions, 1498 flow, removed 23 selfloop flow, removed 2 redundant places. [2023-01-28 04:58:15,997 INFO L231 Difference]: Finished difference. Result has 75 places, 100 transitions, 1119 flow [2023-01-28 04:58:15,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1119, PETRI_PLACES=75, PETRI_TRANSITIONS=100} [2023-01-28 04:58:15,998 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 45 predicate places. [2023-01-28 04:58:15,999 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 100 transitions, 1119 flow [2023-01-28 04:58:15,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 104.0) internal successors, (1664), 16 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states 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 04:58:15,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:15,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:58:16,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 04:58:16,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:16,205 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:58:16,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:16,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1041658654, now seen corresponding path program 6 times [2023-01-28 04:58:16,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:16,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979114787] [2023-01-28 04:58:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:16,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:16,340 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 04:58:16,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:16,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979114787] [2023-01-28 04:58:16,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979114787] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:16,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569989979] [2023-01-28 04:58:16,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:58:16,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:16,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:58:16,342 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 04:58:16,351 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 04:58:16,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 04:58:16,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:58:16,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:58:16,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:58:16,538 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 04:58:16,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:58:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:58:16,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569989979] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:16,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 04:58:16,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2023-01-28 04:58:16,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941635061] [2023-01-28 04:58:16,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:58:16,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 04:58:16,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:16,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 04:58:16,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-01-28 04:58:16,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 281 [2023-01-28 04:58:16,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 100 transitions, 1119 flow. Second operand has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:16,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:16,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 281 [2023-01-28 04:58:16,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:16,910 INFO L130 PetriNetUnfolder]: 1158/1728 cut-off events. [2023-01-28 04:58:16,911 INFO L131 PetriNetUnfolder]: For 12555/12594 co-relation queries the response was YES. [2023-01-28 04:58:16,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9329 conditions, 1728 events. 1158/1728 cut-off events. For 12555/12594 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7471 event pairs, 261 based on Foata normal form. 42/1762 useless extension candidates. Maximal degree in co-relation 9289. Up to 918 conditions per place. [2023-01-28 04:58:16,929 INFO L137 encePairwiseOnDemand]: 273/281 looper letters, 72 selfloop transitions, 55 changer transitions 0/134 dead transitions. [2023-01-28 04:58:16,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 134 transitions, 1571 flow [2023-01-28 04:58:16,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:58:16,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:58:16,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 791 transitions. [2023-01-28 04:58:16,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40213523131672596 [2023-01-28 04:58:16,932 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 791 transitions. [2023-01-28 04:58:16,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 791 transitions. [2023-01-28 04:58:16,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:16,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 791 transitions. [2023-01-28 04:58:16,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 113.0) internal successors, (791), 7 states have internal predecessors, (791), 0 states have call successors, (0), 0 states 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 04:58:16,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 281.0) internal successors, (2248), 8 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 04:58:16,937 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 281.0) internal successors, (2248), 8 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 04:58:16,937 INFO L175 Difference]: Start difference. First operand has 75 places, 100 transitions, 1119 flow. Second operand 7 states and 791 transitions. [2023-01-28 04:58:16,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 134 transitions, 1571 flow [2023-01-28 04:58:16,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 134 transitions, 1511 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-01-28 04:58:16,981 INFO L231 Difference]: Finished difference. Result has 80 places, 106 transitions, 1296 flow [2023-01-28 04:58:16,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1296, PETRI_PLACES=80, PETRI_TRANSITIONS=106} [2023-01-28 04:58:16,982 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2023-01-28 04:58:16,982 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 106 transitions, 1296 flow [2023-01-28 04:58:16,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 108.0) internal successors, (756), 7 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:16,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:16,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:58:16,991 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 04:58:17,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:17,192 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:58:17,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:17,192 INFO L85 PathProgramCache]: Analyzing trace with hash 559981522, now seen corresponding path program 1 times [2023-01-28 04:58:17,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:17,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609173438] [2023-01-28 04:58:17,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:17,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:17,259 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 04:58:17,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:17,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609173438] [2023-01-28 04:58:17,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609173438] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:17,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540549692] [2023-01-28 04:58:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:17,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:17,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:58:17,261 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 04:58:17,263 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 04:58:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:17,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:58:17,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:58:17,378 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 04:58:17,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:58:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:58:17,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540549692] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:17,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 04:58:17,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-01-28 04:58:17,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957400589] [2023-01-28 04:58:17,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:58:17,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 04:58:17,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:17,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 04:58:17,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-01-28 04:58:17,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 281 [2023-01-28 04:58:17,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 106 transitions, 1296 flow. Second operand has 5 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 0 states have call successors, (0), 0 states 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 04:58:17,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:17,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 281 [2023-01-28 04:58:17,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:17,615 INFO L130 PetriNetUnfolder]: 960/1418 cut-off events. [2023-01-28 04:58:17,615 INFO L131 PetriNetUnfolder]: For 11945/12158 co-relation queries the response was YES. [2023-01-28 04:58:17,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7851 conditions, 1418 events. 960/1418 cut-off events. For 11945/12158 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6191 event pairs, 280 based on Foata normal form. 218/1558 useless extension candidates. Maximal degree in co-relation 7808. Up to 1101 conditions per place. [2023-01-28 04:58:17,626 INFO L137 encePairwiseOnDemand]: 276/281 looper letters, 105 selfloop transitions, 11 changer transitions 0/129 dead transitions. [2023-01-28 04:58:17,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 129 transitions, 1751 flow [2023-01-28 04:58:17,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 04:58:17,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 04:58:17,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 599 transitions. [2023-01-28 04:58:17,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42633451957295376 [2023-01-28 04:58:17,629 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 599 transitions. [2023-01-28 04:58:17,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 599 transitions. [2023-01-28 04:58:17,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:17,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 599 transitions. [2023-01-28 04:58:17,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 0 states 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 04:58:17,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states 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 04:58:17,633 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states 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 04:58:17,633 INFO L175 Difference]: Start difference. First operand has 80 places, 106 transitions, 1296 flow. Second operand 5 states and 599 transitions. [2023-01-28 04:58:17,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 129 transitions, 1751 flow [2023-01-28 04:58:17,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 129 transitions, 1624 flow, removed 21 selfloop flow, removed 4 redundant places. [2023-01-28 04:58:17,650 INFO L231 Difference]: Finished difference. Result has 81 places, 107 transitions, 1226 flow [2023-01-28 04:58:17,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1226, PETRI_PLACES=81, PETRI_TRANSITIONS=107} [2023-01-28 04:58:17,651 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 51 predicate places. [2023-01-28 04:58:17,651 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 107 transitions, 1226 flow [2023-01-28 04:58:17,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 0 states have call successors, (0), 0 states 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 04:58:17,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:17,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:58:17,663 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 04:58:17,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:17,857 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:58:17,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:17,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1412736136, now seen corresponding path program 1 times [2023-01-28 04:58:17,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:17,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193718469] [2023-01-28 04:58:17,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:17,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:58:18,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:18,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193718469] [2023-01-28 04:58:18,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193718469] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:18,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615933291] [2023-01-28 04:58:18,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:18,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:18,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:58:18,886 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 04:58:18,914 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 04:58:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:18,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 04:58:18,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:58:19,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 04:58:19,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 04:58:19,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:58:19,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:58:19,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:58:19,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:58:19,549 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 04:58:19,551 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:58:19,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-01-28 04:58:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:58:19,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:58:20,392 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:58:20,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 49 [2023-01-28 04:58:20,410 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:58:20,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 990 treesize of output 902 [2023-01-28 04:58:20,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 192 [2023-01-28 04:58:20,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 180 [2023-01-28 04:58:20,455 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:58:20,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 91 [2023-01-28 04:58:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:58:21,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615933291] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:58:21,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:58:21,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-01-28 04:58:21,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657455656] [2023-01-28 04:58:21,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:58:21,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 04:58:21,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:21,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 04:58:21,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=685, Unknown=9, NotChecked=0, Total=812 [2023-01-28 04:58:21,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 281 [2023-01-28 04:58:21,286 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 107 transitions, 1226 flow. Second operand has 29 states, 29 states have (on average 77.27586206896552) internal successors, (2241), 29 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states 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 04:58:21,286 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:21,286 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 281 [2023-01-28 04:58:21,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:24,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 04:58:27,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 04:58:28,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 04:58:31,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 04:58:31,391 INFO L130 PetriNetUnfolder]: 2229/3359 cut-off events. [2023-01-28 04:58:31,391 INFO L131 PetriNetUnfolder]: For 22197/22435 co-relation queries the response was YES. [2023-01-28 04:58:31,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18348 conditions, 3359 events. 2229/3359 cut-off events. For 22197/22435 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 16860 event pairs, 105 based on Foata normal form. 201/3555 useless extension candidates. Maximal degree in co-relation 17048. Up to 1743 conditions per place. [2023-01-28 04:58:31,422 INFO L137 encePairwiseOnDemand]: 271/281 looper letters, 194 selfloop transitions, 178 changer transitions 7/384 dead transitions. [2023-01-28 04:58:31,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 384 transitions, 4696 flow [2023-01-28 04:58:31,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 04:58:31,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 04:58:31,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1517 transitions. [2023-01-28 04:58:31,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2999209173586398 [2023-01-28 04:58:31,427 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1517 transitions. [2023-01-28 04:58:31,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1517 transitions. [2023-01-28 04:58:31,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:31,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1517 transitions. [2023-01-28 04:58:31,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 84.27777777777777) internal successors, (1517), 18 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states 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 04:58:31,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 281.0) internal successors, (5339), 19 states have internal predecessors, (5339), 0 states have call successors, (0), 0 states 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 04:58:31,437 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 281.0) internal successors, (5339), 19 states have internal predecessors, (5339), 0 states have call successors, (0), 0 states 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 04:58:31,437 INFO L175 Difference]: Start difference. First operand has 81 places, 107 transitions, 1226 flow. Second operand 18 states and 1517 transitions. [2023-01-28 04:58:31,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 384 transitions, 4696 flow [2023-01-28 04:58:31,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 384 transitions, 4650 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-01-28 04:58:31,483 INFO L231 Difference]: Finished difference. Result has 103 places, 252 transitions, 3537 flow [2023-01-28 04:58:31,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3537, PETRI_PLACES=103, PETRI_TRANSITIONS=252} [2023-01-28 04:58:31,485 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2023-01-28 04:58:31,485 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 252 transitions, 3537 flow [2023-01-28 04:58:31,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 77.27586206896552) internal successors, (2241), 29 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states 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 04:58:31,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:31,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:58:31,494 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 04:58:31,691 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,SelfDestructingSolverStorable11 [2023-01-28 04:58:31,692 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:58:31,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:31,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2051396741, now seen corresponding path program 1 times [2023-01-28 04:58:31,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:31,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850733589] [2023-01-28 04:58:31,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:31,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:58:32,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:32,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850733589] [2023-01-28 04:58:32,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850733589] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:32,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677336542] [2023-01-28 04:58:32,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:32,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:32,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:58:32,445 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 04:58:32,449 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 04:58:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:32,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 04:58:32,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:58:32,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 04:58:32,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 04:58:32,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 04:58:32,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 04:58:32,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-01-28 04:58:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:58:32,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:58:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:58:33,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677336542] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:58:33,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:58:33,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 4] total 17 [2023-01-28 04:58:33,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232108456] [2023-01-28 04:58:33,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:58:33,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 04:58:33,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:33,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 04:58:33,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-01-28 04:58:33,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 281 [2023-01-28 04:58:33,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 252 transitions, 3537 flow. Second operand has 19 states, 19 states have (on average 89.6842105263158) internal successors, (1704), 19 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 04:58:33,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:33,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 281 [2023-01-28 04:58:33,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:33,994 INFO L130 PetriNetUnfolder]: 3387/5092 cut-off events. [2023-01-28 04:58:33,995 INFO L131 PetriNetUnfolder]: For 49372/49903 co-relation queries the response was YES. [2023-01-28 04:58:34,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31702 conditions, 5092 events. 3387/5092 cut-off events. For 49372/49903 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 27480 event pairs, 331 based on Foata normal form. 459/5463 useless extension candidates. Maximal degree in co-relation 31036. Up to 3467 conditions per place. [2023-01-28 04:58:34,116 INFO L137 encePairwiseOnDemand]: 271/281 looper letters, 210 selfloop transitions, 214 changer transitions 1/438 dead transitions. [2023-01-28 04:58:34,116 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 438 transitions, 6696 flow [2023-01-28 04:58:34,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 04:58:34,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 04:58:34,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 786 transitions. [2023-01-28 04:58:34,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.349644128113879 [2023-01-28 04:58:34,120 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 786 transitions. [2023-01-28 04:58:34,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 786 transitions. [2023-01-28 04:58:34,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:34,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 786 transitions. [2023-01-28 04:58:34,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 98.25) internal successors, (786), 8 states have internal predecessors, (786), 0 states have call successors, (0), 0 states 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 04:58:34,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states 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 04:58:34,125 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states 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 04:58:34,125 INFO L175 Difference]: Start difference. First operand has 103 places, 252 transitions, 3537 flow. Second operand 8 states and 786 transitions. [2023-01-28 04:58:34,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 438 transitions, 6696 flow [2023-01-28 04:58:34,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 438 transitions, 6321 flow, removed 151 selfloop flow, removed 2 redundant places. [2023-01-28 04:58:34,246 INFO L231 Difference]: Finished difference. Result has 112 places, 365 transitions, 5543 flow [2023-01-28 04:58:34,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=3291, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5543, PETRI_PLACES=112, PETRI_TRANSITIONS=365} [2023-01-28 04:58:34,248 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 82 predicate places. [2023-01-28 04:58:34,248 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 365 transitions, 5543 flow [2023-01-28 04:58:34,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 89.6842105263158) internal successors, (1704), 19 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 04:58:34,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:34,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:58:34,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 04:58:34,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-28 04:58:34,472 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:58:34,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:34,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1764233959, now seen corresponding path program 2 times [2023-01-28 04:58:34,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:34,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963658204] [2023-01-28 04:58:34,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:34,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:35,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:58:35,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:35,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963658204] [2023-01-28 04:58:35,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963658204] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:35,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625623692] [2023-01-28 04:58:35,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:58:35,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:35,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:58:35,110 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 04:58:35,113 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 04:58:35,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:58:35,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:58:35,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 04:58:35,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:58:35,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:58:35,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:58:35,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-01-28 04:58:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:58:35,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:58:35,660 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:58:35,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 44 [2023-01-28 04:58:35,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-01-28 04:58:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:58:35,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625623692] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:58:35,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:58:35,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2023-01-28 04:58:35,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814444359] [2023-01-28 04:58:35,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:58:35,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 04:58:35,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:35,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 04:58:35,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=402, Unknown=2, NotChecked=0, Total=506 [2023-01-28 04:58:35,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 281 [2023-01-28 04:58:35,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 365 transitions, 5543 flow. Second operand has 23 states, 23 states have (on average 89.78260869565217) internal successors, (2065), 23 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states 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 04:58:35,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:35,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 281 [2023-01-28 04:58:35,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:37,080 INFO L130 PetriNetUnfolder]: 4160/6267 cut-off events. [2023-01-28 04:58:37,080 INFO L131 PetriNetUnfolder]: For 70937/71692 co-relation queries the response was YES. [2023-01-28 04:58:37,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41545 conditions, 6267 events. 4160/6267 cut-off events. For 70937/71692 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 35502 event pairs, 456 based on Foata normal form. 627/6735 useless extension candidates. Maximal degree in co-relation 40916. Up to 3769 conditions per place. [2023-01-28 04:58:37,143 INFO L137 encePairwiseOnDemand]: 272/281 looper letters, 212 selfloop transitions, 294 changer transitions 1/520 dead transitions. [2023-01-28 04:58:37,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 520 transitions, 8515 flow [2023-01-28 04:58:37,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 04:58:37,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 04:58:37,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 786 transitions. [2023-01-28 04:58:37,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.349644128113879 [2023-01-28 04:58:37,147 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 786 transitions. [2023-01-28 04:58:37,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 786 transitions. [2023-01-28 04:58:37,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:37,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 786 transitions. [2023-01-28 04:58:37,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 98.25) internal successors, (786), 8 states have internal predecessors, (786), 0 states have call successors, (0), 0 states 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 04:58:37,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states 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 04:58:37,153 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states 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 04:58:37,153 INFO L175 Difference]: Start difference. First operand has 112 places, 365 transitions, 5543 flow. Second operand 8 states and 786 transitions. [2023-01-28 04:58:37,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 520 transitions, 8515 flow [2023-01-28 04:58:37,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 520 transitions, 8417 flow, removed 48 selfloop flow, removed 1 redundant places. [2023-01-28 04:58:37,334 INFO L231 Difference]: Finished difference. Result has 121 places, 447 transitions, 7653 flow [2023-01-28 04:58:37,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=5445, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7653, PETRI_PLACES=121, PETRI_TRANSITIONS=447} [2023-01-28 04:58:37,335 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 91 predicate places. [2023-01-28 04:58:37,335 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 447 transitions, 7653 flow [2023-01-28 04:58:37,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 89.78260869565217) internal successors, (2065), 23 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states 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 04:58:37,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:37,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:58:37,341 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 04:58:37,541 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,SelfDestructingSolverStorable13 [2023-01-28 04:58:37,541 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:58:37,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:37,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1756959189, now seen corresponding path program 3 times [2023-01-28 04:58:37,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:37,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587646444] [2023-01-28 04:58:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:37,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:58:37,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:37,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587646444] [2023-01-28 04:58:37,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587646444] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:37,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487417065] [2023-01-28 04:58:37,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:58:37,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:37,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:58:37,929 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 04:58:37,932 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 04:58:38,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:58:38,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:58:38,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 04:58:38,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:58:38,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-01-28 04:58:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:58:38,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:58:38,286 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:58:38,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2023-01-28 04:58:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:58:38,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487417065] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:58:38,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:58:38,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 11 [2023-01-28 04:58:38,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976240403] [2023-01-28 04:58:38,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:58:38,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 04:58:38,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:38,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 04:58:38,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-01-28 04:58:38,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 281 [2023-01-28 04:58:38,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 447 transitions, 7653 flow. Second operand has 13 states, 13 states have (on average 106.15384615384616) internal successors, (1380), 13 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states 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 04:58:38,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:38,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 281 [2023-01-28 04:58:38,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:39,465 INFO L130 PetriNetUnfolder]: 4486/6773 cut-off events. [2023-01-28 04:58:39,465 INFO L131 PetriNetUnfolder]: For 96139/97037 co-relation queries the response was YES. [2023-01-28 04:58:39,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49006 conditions, 6773 events. 4486/6773 cut-off events. For 96139/97037 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 39010 event pairs, 835 based on Foata normal form. 754/7313 useless extension candidates. Maximal degree in co-relation 48359. Up to 5828 conditions per place. [2023-01-28 04:58:39,517 INFO L137 encePairwiseOnDemand]: 273/281 looper letters, 377 selfloop transitions, 164 changer transitions 1/555 dead transitions. [2023-01-28 04:58:39,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 555 transitions, 10117 flow [2023-01-28 04:58:39,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:58:39,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:58:39,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 795 transitions. [2023-01-28 04:58:39,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041687849517031 [2023-01-28 04:58:39,520 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 795 transitions. [2023-01-28 04:58:39,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 795 transitions. [2023-01-28 04:58:39,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:39,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 795 transitions. [2023-01-28 04:58:39,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 113.57142857142857) internal successors, (795), 7 states have internal predecessors, (795), 0 states have call successors, (0), 0 states 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 04:58:39,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 281.0) internal successors, (2248), 8 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 04:58:39,524 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 281.0) internal successors, (2248), 8 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 04:58:39,524 INFO L175 Difference]: Start difference. First operand has 121 places, 447 transitions, 7653 flow. Second operand 7 states and 795 transitions. [2023-01-28 04:58:39,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 555 transitions, 10117 flow [2023-01-28 04:58:39,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 555 transitions, 9930 flow, removed 37 selfloop flow, removed 3 redundant places. [2023-01-28 04:58:39,798 INFO L231 Difference]: Finished difference. Result has 127 places, 498 transitions, 8883 flow [2023-01-28 04:58:39,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=7478, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8883, PETRI_PLACES=127, PETRI_TRANSITIONS=498} [2023-01-28 04:58:39,798 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2023-01-28 04:58:39,798 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 498 transitions, 8883 flow [2023-01-28 04:58:39,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 106.15384615384616) internal successors, (1380), 13 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states 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 04:58:39,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:39,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:58:39,804 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 04:58:40,004 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,SelfDestructingSolverStorable14 [2023-01-28 04:58:40,004 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:58:40,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:40,005 INFO L85 PathProgramCache]: Analyzing trace with hash -630875223, now seen corresponding path program 4 times [2023-01-28 04:58:40,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:40,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518682546] [2023-01-28 04:58:40,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:40,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:40,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:58:40,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:40,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518682546] [2023-01-28 04:58:40,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518682546] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:40,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790700671] [2023-01-28 04:58:40,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:58:40,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:40,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:58:40,392 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 04:58:40,416 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 04:58:40,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:58:40,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:58:40,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 04:58:40,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:58:40,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-01-28 04:58:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:58:40,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:58:40,734 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:58:40,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2023-01-28 04:58:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:58:40,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790700671] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:58:40,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:58:40,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 15 [2023-01-28 04:58:40,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663400640] [2023-01-28 04:58:40,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:58:40,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 04:58:40,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:40,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 04:58:40,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-01-28 04:58:40,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 281 [2023-01-28 04:58:40,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 498 transitions, 8883 flow. Second operand has 17 states, 17 states have (on average 105.88235294117646) internal successors, (1800), 17 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states 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 04:58:40,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:40,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 281 [2023-01-28 04:58:40,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:42,074 INFO L130 PetriNetUnfolder]: 4598/6954 cut-off events. [2023-01-28 04:58:42,075 INFO L131 PetriNetUnfolder]: For 102824/103745 co-relation queries the response was YES. [2023-01-28 04:58:42,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51373 conditions, 6954 events. 4598/6954 cut-off events. For 102824/103745 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 40480 event pairs, 872 based on Foata normal form. 765/7492 useless extension candidates. Maximal degree in co-relation 50716. Up to 6375 conditions per place. [2023-01-28 04:58:42,119 INFO L137 encePairwiseOnDemand]: 273/281 looper letters, 428 selfloop transitions, 109 changer transitions 1/551 dead transitions. [2023-01-28 04:58:42,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 551 transitions, 10448 flow [2023-01-28 04:58:42,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:58:42,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:58:42,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 790 transitions. [2023-01-28 04:58:42,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4016268429079817 [2023-01-28 04:58:42,121 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 790 transitions. [2023-01-28 04:58:42,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 790 transitions. [2023-01-28 04:58:42,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:42,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 790 transitions. [2023-01-28 04:58:42,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 112.85714285714286) internal successors, (790), 7 states have internal predecessors, (790), 0 states have call successors, (0), 0 states 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 04:58:42,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 281.0) internal successors, (2248), 8 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 04:58:42,125 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 281.0) internal successors, (2248), 8 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 04:58:42,126 INFO L175 Difference]: Start difference. First operand has 127 places, 498 transitions, 8883 flow. Second operand 7 states and 790 transitions. [2023-01-28 04:58:42,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 551 transitions, 10448 flow [2023-01-28 04:58:42,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 551 transitions, 10198 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-01-28 04:58:42,413 INFO L231 Difference]: Finished difference. Result has 132 places, 509 transitions, 9026 flow [2023-01-28 04:58:42,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=8633, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9026, PETRI_PLACES=132, PETRI_TRANSITIONS=509} [2023-01-28 04:58:42,414 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 102 predicate places. [2023-01-28 04:58:42,414 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 509 transitions, 9026 flow [2023-01-28 04:58:42,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 105.88235294117646) internal successors, (1800), 17 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states 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 04:58:42,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:42,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:58:42,420 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 04:58:42,615 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,SelfDestructingSolverStorable15 [2023-01-28 04:58:42,616 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:58:42,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:42,616 INFO L85 PathProgramCache]: Analyzing trace with hash 529415184, now seen corresponding path program 2 times [2023-01-28 04:58:42,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:42,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280629284] [2023-01-28 04:58:42,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:42,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:43,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:58:43,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:43,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280629284] [2023-01-28 04:58:43,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280629284] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:43,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106504198] [2023-01-28 04:58:43,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:58:43,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:43,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:58:43,662 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 04:58:43,665 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 04:58:43,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:58:43,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:58:43,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-28 04:58:43,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:58:44,151 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 04:58:44,153 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:58:44,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-01-28 04:58:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:58:44,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:58:44,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:58:44,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2023-01-28 04:58:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:58:44,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106504198] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:58:44,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:58:44,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2023-01-28 04:58:44,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751445737] [2023-01-28 04:58:44,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:58:44,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 04:58:44,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:44,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 04:58:44,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2023-01-28 04:58:44,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 281 [2023-01-28 04:58:44,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 509 transitions, 9026 flow. Second operand has 25 states, 25 states have (on average 77.4) internal successors, (1935), 25 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states 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 04:58:44,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:44,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 281 [2023-01-28 04:58:44,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:46,886 INFO L130 PetriNetUnfolder]: 5174/7875 cut-off events. [2023-01-28 04:58:46,887 INFO L131 PetriNetUnfolder]: For 100037/100345 co-relation queries the response was YES. [2023-01-28 04:58:46,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56711 conditions, 7875 events. 5174/7875 cut-off events. For 100037/100345 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 46498 event pairs, 733 based on Foata normal form. 254/8095 useless extension candidates. Maximal degree in co-relation 56102. Up to 5915 conditions per place. [2023-01-28 04:58:46,934 INFO L137 encePairwiseOnDemand]: 271/281 looper letters, 387 selfloop transitions, 271 changer transitions 4/676 dead transitions. [2023-01-28 04:58:46,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 676 transitions, 12157 flow [2023-01-28 04:58:46,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 04:58:46,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 04:58:46,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1413 transitions. [2023-01-28 04:58:46,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29579233828762824 [2023-01-28 04:58:46,938 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1413 transitions. [2023-01-28 04:58:46,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1413 transitions. [2023-01-28 04:58:46,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:46,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1413 transitions. [2023-01-28 04:58:46,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 83.11764705882354) internal successors, (1413), 17 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states 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 04:58:46,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 281.0) internal successors, (5058), 18 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states 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 04:58:46,946 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 281.0) internal successors, (5058), 18 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states 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 04:58:46,946 INFO L175 Difference]: Start difference. First operand has 132 places, 509 transitions, 9026 flow. Second operand 17 states and 1413 transitions. [2023-01-28 04:58:46,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 676 transitions, 12157 flow [2023-01-28 04:58:47,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 676 transitions, 11956 flow, removed 30 selfloop flow, removed 3 redundant places. [2023-01-28 04:58:47,314 INFO L231 Difference]: Finished difference. Result has 149 places, 592 transitions, 10825 flow [2023-01-28 04:58:47,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=8849, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10825, PETRI_PLACES=149, PETRI_TRANSITIONS=592} [2023-01-28 04:58:47,315 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 119 predicate places. [2023-01-28 04:58:47,316 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 592 transitions, 10825 flow [2023-01-28 04:58:47,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 77.4) internal successors, (1935), 25 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states 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 04:58:47,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:47,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:58:47,325 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 04:58:47,524 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,SelfDestructingSolverStorable16 [2023-01-28 04:58:47,525 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:58:47,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:47,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1608399965, now seen corresponding path program 5 times [2023-01-28 04:58:47,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:47,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886961993] [2023-01-28 04:58:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:47,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:58:48,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:48,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886961993] [2023-01-28 04:58:48,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886961993] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:48,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687745300] [2023-01-28 04:58:48,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:58:48,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:48,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:58:48,067 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 04:58:48,069 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 04:58:48,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:58:48,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:58:48,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 04:58:48,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:58:48,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:58:48,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:58:48,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-01-28 04:58:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:58:48,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:58:48,607 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:58:48,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 48 [2023-01-28 04:58:48,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2023-01-28 04:58:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:58:49,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687745300] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:58:49,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:58:49,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-01-28 04:58:49,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065091304] [2023-01-28 04:58:49,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:58:49,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 04:58:49,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:49,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 04:58:49,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=352, Unknown=1, NotChecked=0, Total=462 [2023-01-28 04:58:49,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 281 [2023-01-28 04:58:49,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 592 transitions, 10825 flow. Second operand has 22 states, 22 states have (on average 100.9090909090909) internal successors, (2220), 22 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states 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 04:58:49,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:49,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 281 [2023-01-28 04:58:49,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:51,542 INFO L130 PetriNetUnfolder]: 5304/8009 cut-off events. [2023-01-28 04:58:51,542 INFO L131 PetriNetUnfolder]: For 128134/129141 co-relation queries the response was YES. [2023-01-28 04:58:51,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61271 conditions, 8009 events. 5304/8009 cut-off events. For 128134/129141 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 47396 event pairs, 988 based on Foata normal form. 821/8612 useless extension candidates. Maximal degree in co-relation 60505. Up to 6736 conditions per place. [2023-01-28 04:58:51,594 INFO L137 encePairwiseOnDemand]: 274/281 looper letters, 432 selfloop transitions, 220 changer transitions 1/671 dead transitions. [2023-01-28 04:58:51,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 671 transitions, 13087 flow [2023-01-28 04:58:51,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:58:51,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:58:51,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 767 transitions. [2023-01-28 04:58:51,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38993390950686324 [2023-01-28 04:58:51,595 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 767 transitions. [2023-01-28 04:58:51,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 767 transitions. [2023-01-28 04:58:51,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:51,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 767 transitions. [2023-01-28 04:58:51,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 109.57142857142857) internal successors, (767), 7 states have internal predecessors, (767), 0 states have call successors, (0), 0 states 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 04:58:51,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 281.0) internal successors, (2248), 8 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 04:58:51,599 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 281.0) internal successors, (2248), 8 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 04:58:51,599 INFO L175 Difference]: Start difference. First operand has 149 places, 592 transitions, 10825 flow. Second operand 7 states and 767 transitions. [2023-01-28 04:58:51,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 671 transitions, 13087 flow [2023-01-28 04:58:52,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 671 transitions, 12884 flow, removed 85 selfloop flow, removed 4 redundant places. [2023-01-28 04:58:52,019 INFO L231 Difference]: Finished difference. Result has 153 places, 614 transitions, 11636 flow [2023-01-28 04:58:52,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=10624, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11636, PETRI_PLACES=153, PETRI_TRANSITIONS=614} [2023-01-28 04:58:52,020 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 123 predicate places. [2023-01-28 04:58:52,020 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 614 transitions, 11636 flow [2023-01-28 04:58:52,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 100.9090909090909) internal successors, (2220), 22 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states 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 04:58:52,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:52,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:58:52,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 04:58:52,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:52,227 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:58:52,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:52,227 INFO L85 PathProgramCache]: Analyzing trace with hash 41254953, now seen corresponding path program 6 times [2023-01-28 04:58:52,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:52,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37493797] [2023-01-28 04:58:52,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:52,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:58:52,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:52,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37493797] [2023-01-28 04:58:52,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37493797] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:52,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795051553] [2023-01-28 04:58:52,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:58:52,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:52,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:58:52,873 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 04:58:52,900 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 04:58:52,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 04:58:52,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:58:52,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 04:58:52,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:58:53,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:58:53,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:58:53,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-01-28 04:58:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:58:53,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:58:53,329 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_753 (Array Int Int))) (= (mod (+ c_~sum3~0 c_~sum2~0) 4294967296) (mod (+ c_~sum1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_753) c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork2_~i~0 4)))) 4294967296))) is different from false [2023-01-28 04:58:53,343 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:58:53,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 48 [2023-01-28 04:58:53,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2023-01-28 04:58:53,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-01-28 04:58:53,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795051553] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:58:53,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:58:53,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2023-01-28 04:58:53,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683514888] [2023-01-28 04:58:53,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:58:53,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 04:58:53,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:53,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 04:58:53,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=359, Unknown=1, NotChecked=40, Total=506 [2023-01-28 04:58:53,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 281 [2023-01-28 04:58:53,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 614 transitions, 11636 flow. Second operand has 23 states, 23 states have (on average 89.3913043478261) internal successors, (2056), 23 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states 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 04:58:53,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:53,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 281 [2023-01-28 04:58:53,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:55,278 INFO L130 PetriNetUnfolder]: 5421/8192 cut-off events. [2023-01-28 04:58:55,278 INFO L131 PetriNetUnfolder]: For 138595/139608 co-relation queries the response was YES. [2023-01-28 04:58:55,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63697 conditions, 8192 events. 5421/8192 cut-off events. For 138595/139608 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 48646 event pairs, 1007 based on Foata normal form. 833/8805 useless extension candidates. Maximal degree in co-relation 62920. Up to 7456 conditions per place. [2023-01-28 04:58:55,354 INFO L137 encePairwiseOnDemand]: 273/281 looper letters, 506 selfloop transitions, 141 changer transitions 1/666 dead transitions. [2023-01-28 04:58:55,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 666 transitions, 13498 flow [2023-01-28 04:58:55,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 04:58:55,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 04:58:55,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 773 transitions. [2023-01-28 04:58:55,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34386120996441283 [2023-01-28 04:58:55,356 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 773 transitions. [2023-01-28 04:58:55,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 773 transitions. [2023-01-28 04:58:55,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:55,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 773 transitions. [2023-01-28 04:58:55,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.625) internal successors, (773), 8 states have internal predecessors, (773), 0 states have call successors, (0), 0 states 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 04:58:55,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states 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 04:58:55,361 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states 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 04:58:55,361 INFO L175 Difference]: Start difference. First operand has 153 places, 614 transitions, 11636 flow. Second operand 8 states and 773 transitions. [2023-01-28 04:58:55,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 666 transitions, 13498 flow [2023-01-28 04:58:55,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 666 transitions, 13177 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-01-28 04:58:55,881 INFO L231 Difference]: Finished difference. Result has 158 places, 624 transitions, 11830 flow [2023-01-28 04:58:55,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=11315, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11830, PETRI_PLACES=158, PETRI_TRANSITIONS=624} [2023-01-28 04:58:55,881 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 128 predicate places. [2023-01-28 04:58:55,882 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 624 transitions, 11830 flow [2023-01-28 04:58:55,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 89.3913043478261) internal successors, (2056), 23 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states 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 04:58:55,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:55,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:58:55,888 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 04:58:56,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:56,083 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:58:56,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:56,083 INFO L85 PathProgramCache]: Analyzing trace with hash 769062817, now seen corresponding path program 7 times [2023-01-28 04:58:56,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:56,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493481783] [2023-01-28 04:58:56,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:56,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:56,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:58:56,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:56,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493481783] [2023-01-28 04:58:56,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493481783] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:56,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658827717] [2023-01-28 04:58:56,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:58:56,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:56,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:58:56,469 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 04:58:56,494 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 04:58:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:56,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 04:58:56,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:58:56,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 04:58:56,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 04:58:56,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 04:58:56,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 04:58:56,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-01-28 04:58:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:58:57,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:58:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:58:57,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658827717] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:58:57,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:58:57,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 4] total 15 [2023-01-28 04:58:57,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640133730] [2023-01-28 04:58:57,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:58:57,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 04:58:57,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:57,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 04:58:57,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-01-28 04:58:57,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 281 [2023-01-28 04:58:57,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 624 transitions, 11830 flow. Second operand has 17 states, 17 states have (on average 90.52941176470588) internal successors, (1539), 17 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states 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 04:58:57,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:57,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 281 [2023-01-28 04:58:57,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:58,726 INFO L130 PetriNetUnfolder]: 5519/8355 cut-off events. [2023-01-28 04:58:58,727 INFO L131 PetriNetUnfolder]: For 142346/143364 co-relation queries the response was YES. [2023-01-28 04:58:58,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64867 conditions, 8355 events. 5519/8355 cut-off events. For 142346/143364 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 49828 event pairs, 1062 based on Foata normal form. 809/8939 useless extension candidates. Maximal degree in co-relation 64080. Up to 7376 conditions per place. [2023-01-28 04:58:58,796 INFO L137 encePairwiseOnDemand]: 272/281 looper letters, 503 selfloop transitions, 166 changer transitions 1/688 dead transitions. [2023-01-28 04:58:58,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 688 transitions, 13912 flow [2023-01-28 04:58:58,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 04:58:58,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 04:58:58,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 775 transitions. [2023-01-28 04:58:58,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3447508896797153 [2023-01-28 04:58:58,797 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 775 transitions. [2023-01-28 04:58:58,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 775 transitions. [2023-01-28 04:58:58,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:58,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 775 transitions. [2023-01-28 04:58:58,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.875) internal successors, (775), 8 states have internal predecessors, (775), 0 states have call successors, (0), 0 states 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 04:58:58,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states 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 04:58:58,801 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states 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 04:58:58,801 INFO L175 Difference]: Start difference. First operand has 158 places, 624 transitions, 11830 flow. Second operand 8 states and 775 transitions. [2023-01-28 04:58:58,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 688 transitions, 13912 flow [2023-01-28 04:58:59,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 688 transitions, 13680 flow, removed 41 selfloop flow, removed 4 redundant places. [2023-01-28 04:58:59,357 INFO L231 Difference]: Finished difference. Result has 164 places, 643 transitions, 12377 flow [2023-01-28 04:58:59,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=11609, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12377, PETRI_PLACES=164, PETRI_TRANSITIONS=643} [2023-01-28 04:58:59,358 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 134 predicate places. [2023-01-28 04:58:59,358 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 643 transitions, 12377 flow [2023-01-28 04:58:59,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 90.52941176470588) internal successors, (1539), 17 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states 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 04:58:59,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:59,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:58:59,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 04:58:59,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:59,565 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:58:59,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:59,566 INFO L85 PathProgramCache]: Analyzing trace with hash -469780055, now seen corresponding path program 8 times [2023-01-28 04:58:59,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:59,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325870520] [2023-01-28 04:58:59,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:59,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:59:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:59:00,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:59:00,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325870520] [2023-01-28 04:59:00,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325870520] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:59:00,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108141399] [2023-01-28 04:59:00,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:59:00,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:59:00,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:59:00,169 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 04:59:00,177 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 04:59:00,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:59:00,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:59:00,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 04:59:00,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:59:00,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-01-28 04:59:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:59:00,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:59:00,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:00,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2023-01-28 04:59:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:59:00,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108141399] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:59:00,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:59:00,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 15 [2023-01-28 04:59:00,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706039595] [2023-01-28 04:59:00,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:59:00,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 04:59:00,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:59:00,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 04:59:00,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-01-28 04:59:00,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 281 [2023-01-28 04:59:00,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 643 transitions, 12377 flow. Second operand has 17 states, 17 states have (on average 90.52941176470588) internal successors, (1539), 17 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states 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 04:59:00,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:59:00,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 281 [2023-01-28 04:59:00,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:59:02,458 INFO L130 PetriNetUnfolder]: 5781/8747 cut-off events. [2023-01-28 04:59:02,458 INFO L131 PetriNetUnfolder]: For 155094/156128 co-relation queries the response was YES. [2023-01-28 04:59:02,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68921 conditions, 8747 events. 5781/8747 cut-off events. For 155094/156128 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 52587 event pairs, 1083 based on Foata normal form. 841/9357 useless extension candidates. Maximal degree in co-relation 68124. Up to 7926 conditions per place. [2023-01-28 04:59:02,519 INFO L137 encePairwiseOnDemand]: 272/281 looper letters, 535 selfloop transitions, 142 changer transitions 1/696 dead transitions. [2023-01-28 04:59:02,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 696 transitions, 14332 flow [2023-01-28 04:59:02,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 04:59:02,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 04:59:02,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 771 transitions. [2023-01-28 04:59:02,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3429715302491103 [2023-01-28 04:59:02,521 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 771 transitions. [2023-01-28 04:59:02,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 771 transitions. [2023-01-28 04:59:02,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:59:02,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 771 transitions. [2023-01-28 04:59:02,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.375) internal successors, (771), 8 states have internal predecessors, (771), 0 states have call successors, (0), 0 states 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 04:59:02,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states 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 04:59:02,524 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states 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 04:59:02,525 INFO L175 Difference]: Start difference. First operand has 164 places, 643 transitions, 12377 flow. Second operand 8 states and 771 transitions. [2023-01-28 04:59:02,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 696 transitions, 14332 flow [2023-01-28 04:59:03,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 696 transitions, 14063 flow, removed 72 selfloop flow, removed 2 redundant places. [2023-01-28 04:59:03,065 INFO L231 Difference]: Finished difference. Result has 172 places, 666 transitions, 12900 flow [2023-01-28 04:59:03,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=12108, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12900, PETRI_PLACES=172, PETRI_TRANSITIONS=666} [2023-01-28 04:59:03,066 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2023-01-28 04:59:03,066 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 666 transitions, 12900 flow [2023-01-28 04:59:03,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 90.52941176470588) internal successors, (1539), 17 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states 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 04:59:03,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:59:03,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:59:03,072 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 04:59:03,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:59:03,271 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:59:03,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:59:03,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1194127343, now seen corresponding path program 9 times [2023-01-28 04:59:03,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:59:03,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091937388] [2023-01-28 04:59:03,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:59:03,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:59:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:59:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:59:03,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:59:03,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091937388] [2023-01-28 04:59:03,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091937388] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:59:03,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061661401] [2023-01-28 04:59:03,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:59:03,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:59:03,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:59:03,845 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 04:59:03,853 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 04:59:03,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:59:03,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:59:03,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 04:59:03,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:59:04,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 04:59:04,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 04:59:04,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:59:04,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:59:04,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:59:04,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:59:04,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-01-28 04:59:04,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:59:04,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:59:08,593 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_894 (Array Int Int)) (v_ArrVal_895 (Array Int Int))) (= (mod (+ c_~sum3~0 c_~sum2~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_894) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_895) c_~A~0.base) c_~A~0.offset)) 4294967296) (mod (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork2_~i~0 4))) c_~sum1~0) 4294967296))) is different from false [2023-01-28 04:59:10,696 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_894 (Array Int Int)) (v_ArrVal_893 (Array Int Int)) (v_ArrVal_895 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_893))) (= (mod (+ c_~sum3~0 (select (select (store (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_894) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_895) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.offset|) c_~sum2~0) 4294967296) (mod (+ c_~sum1~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.offset|)) 4294967296)))) is different from false [2023-01-28 04:59:10,708 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:10,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2023-01-28 04:59:10,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3478 treesize of output 3158 [2023-01-28 04:59:10,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 188 treesize of output 184 [2023-01-28 04:59:10,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 86 [2023-01-28 04:59:10,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 166 [2023-01-28 04:59:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-01-28 04:59:11,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061661401] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:59:11,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:59:11,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2023-01-28 04:59:11,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794097046] [2023-01-28 04:59:11,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:59:11,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 04:59:11,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:59:11,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 04:59:11,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=431, Unknown=17, NotChecked=90, Total=650 [2023-01-28 04:59:11,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 281 [2023-01-28 04:59:11,011 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 666 transitions, 12900 flow. Second operand has 26 states, 26 states have (on average 89.46153846153847) internal successors, (2326), 26 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states 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 04:59:11,011 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:59:11,011 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 281 [2023-01-28 04:59:11,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:59:15,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 04:59:15,513 INFO L130 PetriNetUnfolder]: 6178/9407 cut-off events. [2023-01-28 04:59:15,513 INFO L131 PetriNetUnfolder]: For 169718/170830 co-relation queries the response was YES. [2023-01-28 04:59:15,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74426 conditions, 9407 events. 6178/9407 cut-off events. For 169718/170830 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 58121 event pairs, 796 based on Foata normal form. 893/10063 useless extension candidates. Maximal degree in co-relation 73618. Up to 5804 conditions per place. [2023-01-28 04:59:15,606 INFO L137 encePairwiseOnDemand]: 272/281 looper letters, 307 selfloop transitions, 462 changer transitions 2/789 dead transitions. [2023-01-28 04:59:15,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 789 transitions, 16109 flow [2023-01-28 04:59:15,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 04:59:15,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 04:59:15,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 887 transitions. [2023-01-28 04:59:15,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35073151443258205 [2023-01-28 04:59:15,608 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 887 transitions. [2023-01-28 04:59:15,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 887 transitions. [2023-01-28 04:59:15,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:59:15,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 887 transitions. [2023-01-28 04:59:15,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 98.55555555555556) internal successors, (887), 9 states have internal predecessors, (887), 0 states have call successors, (0), 0 states 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 04:59:15,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 281.0) internal successors, (2810), 10 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states 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 04:59:15,613 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 281.0) internal successors, (2810), 10 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states 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 04:59:15,613 INFO L175 Difference]: Start difference. First operand has 172 places, 666 transitions, 12900 flow. Second operand 9 states and 887 transitions. [2023-01-28 04:59:15,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 789 transitions, 16109 flow [2023-01-28 04:59:16,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 789 transitions, 15818 flow, removed 95 selfloop flow, removed 2 redundant places. [2023-01-28 04:59:16,515 INFO L231 Difference]: Finished difference. Result has 182 places, 713 transitions, 15006 flow [2023-01-28 04:59:16,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=12609, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15006, PETRI_PLACES=182, PETRI_TRANSITIONS=713} [2023-01-28 04:59:16,516 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 152 predicate places. [2023-01-28 04:59:16,516 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 713 transitions, 15006 flow [2023-01-28 04:59:16,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 89.46153846153847) internal successors, (2326), 26 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states 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 04:59:16,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:59:16,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:59:16,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-28 04:59:16,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:59:16,717 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:59:16,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:59:16,717 INFO L85 PathProgramCache]: Analyzing trace with hash -740267701, now seen corresponding path program 10 times [2023-01-28 04:59:16,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:59:16,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546688208] [2023-01-28 04:59:16,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:59:16,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:59:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:59:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:59:17,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:59:17,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546688208] [2023-01-28 04:59:17,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546688208] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:59:17,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295830252] [2023-01-28 04:59:17,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:59:17,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:59:17,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:59:17,254 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 04:59:17,256 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 04:59:17,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:59:17,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:59:17,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 24 conjunts are in the unsatisfiable core [2023-01-28 04:59:17,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:59:17,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:59:17,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:59:17,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-01-28 04:59:17,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:59:17,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:59:17,698 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:17,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 48 [2023-01-28 04:59:17,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2023-01-28 04:59:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:59:17,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295830252] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:59:17,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:59:17,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2023-01-28 04:59:17,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503378692] [2023-01-28 04:59:17,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:59:17,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 04:59:17,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:59:17,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 04:59:17,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=436, Unknown=3, NotChecked=0, Total=552 [2023-01-28 04:59:17,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 281 [2023-01-28 04:59:17,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 713 transitions, 15006 flow. Second operand has 24 states, 24 states have (on average 89.75) internal successors, (2154), 24 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states 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 04:59:17,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:59:17,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 281 [2023-01-28 04:59:17,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:59:19,962 INFO L130 PetriNetUnfolder]: 6377/9663 cut-off events. [2023-01-28 04:59:19,963 INFO L131 PetriNetUnfolder]: For 208404/209575 co-relation queries the response was YES. [2023-01-28 04:59:20,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81561 conditions, 9663 events. 6377/9663 cut-off events. For 208404/209575 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 59444 event pairs, 1345 based on Foata normal form. 925/10286 useless extension candidates. Maximal degree in co-relation 80726. Up to 8414 conditions per place. [2023-01-28 04:59:20,085 INFO L137 encePairwiseOnDemand]: 273/281 looper letters, 562 selfloop transitions, 187 changer transitions 1/768 dead transitions. [2023-01-28 04:59:20,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 768 transitions, 17160 flow [2023-01-28 04:59:20,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 04:59:20,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 04:59:20,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 775 transitions. [2023-01-28 04:59:20,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3447508896797153 [2023-01-28 04:59:20,086 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 775 transitions. [2023-01-28 04:59:20,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 775 transitions. [2023-01-28 04:59:20,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:59:20,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 775 transitions. [2023-01-28 04:59:20,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.875) internal successors, (775), 8 states have internal predecessors, (775), 0 states have call successors, (0), 0 states 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 04:59:20,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states 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 04:59:20,089 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states 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 04:59:20,089 INFO L175 Difference]: Start difference. First operand has 182 places, 713 transitions, 15006 flow. Second operand 8 states and 775 transitions. [2023-01-28 04:59:20,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 768 transitions, 17160 flow [2023-01-28 04:59:20,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 768 transitions, 16760 flow, removed 128 selfloop flow, removed 3 redundant places. [2023-01-28 04:59:20,946 INFO L231 Difference]: Finished difference. Result has 188 places, 723 transitions, 15319 flow [2023-01-28 04:59:20,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=14606, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15319, PETRI_PLACES=188, PETRI_TRANSITIONS=723} [2023-01-28 04:59:20,947 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 158 predicate places. [2023-01-28 04:59:20,947 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 723 transitions, 15319 flow [2023-01-28 04:59:20,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 89.75) internal successors, (2154), 24 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states 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 04:59:20,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:59:20,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:59:20,952 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 04:59:21,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:59:21,148 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:59:21,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:59:21,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1423152773, now seen corresponding path program 11 times [2023-01-28 04:59:21,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:59:21,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57457449] [2023-01-28 04:59:21,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:59:21,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:59:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:59:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:59:21,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:59:21,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57457449] [2023-01-28 04:59:21,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57457449] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:59:21,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245231787] [2023-01-28 04:59:21,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:59:21,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:59:21,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:59:21,481 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 04:59:21,506 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 04:59:21,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:59:21,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:59:21,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 04:59:21,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:59:21,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-01-28 04:59:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:59:21,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:59:21,801 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:21,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2023-01-28 04:59:21,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:59:21,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245231787] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:59:21,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:59:21,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 11 [2023-01-28 04:59:21,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208790831] [2023-01-28 04:59:21,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:59:21,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 04:59:21,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:59:21,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 04:59:21,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-01-28 04:59:21,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 281 [2023-01-28 04:59:21,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 723 transitions, 15319 flow. Second operand has 13 states, 13 states have (on average 106.07692307692308) internal successors, (1379), 13 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states 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 04:59:21,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:59:21,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 281 [2023-01-28 04:59:21,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:59:23,708 INFO L130 PetriNetUnfolder]: 6496/9848 cut-off events. [2023-01-28 04:59:23,708 INFO L131 PetriNetUnfolder]: For 210272/211469 co-relation queries the response was YES. [2023-01-28 04:59:23,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83315 conditions, 9848 events. 6496/9848 cut-off events. For 210272/211469 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 60796 event pairs, 1441 based on Foata normal form. 949/10509 useless extension candidates. Maximal degree in co-relation 82475. Up to 9187 conditions per place. [2023-01-28 04:59:23,826 INFO L137 encePairwiseOnDemand]: 273/281 looper letters, 611 selfloop transitions, 135 changer transitions 1/765 dead transitions. [2023-01-28 04:59:23,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 765 transitions, 17285 flow [2023-01-28 04:59:23,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:59:23,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:59:23,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 787 transitions. [2023-01-28 04:59:23,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40010167768174887 [2023-01-28 04:59:23,828 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 787 transitions. [2023-01-28 04:59:23,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 787 transitions. [2023-01-28 04:59:23,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:59:23,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 787 transitions. [2023-01-28 04:59:23,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 112.42857142857143) internal successors, (787), 7 states have internal predecessors, (787), 0 states have call successors, (0), 0 states 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 04:59:23,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 281.0) internal successors, (2248), 8 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 04:59:23,831 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 281.0) internal successors, (2248), 8 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 04:59:23,831 INFO L175 Difference]: Start difference. First operand has 188 places, 723 transitions, 15319 flow. Second operand 7 states and 787 transitions. [2023-01-28 04:59:23,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 765 transitions, 17285 flow [2023-01-28 04:59:24,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 765 transitions, 16916 flow, removed 68 selfloop flow, removed 4 redundant places. [2023-01-28 04:59:24,670 INFO L231 Difference]: Finished difference. Result has 192 places, 731 transitions, 15450 flow [2023-01-28 04:59:24,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=14960, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15450, PETRI_PLACES=192, PETRI_TRANSITIONS=731} [2023-01-28 04:59:24,671 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 162 predicate places. [2023-01-28 04:59:24,671 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 731 transitions, 15450 flow [2023-01-28 04:59:24,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 106.07692307692308) internal successors, (1379), 13 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states 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 04:59:24,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:59:24,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:59:24,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-28 04:59:24,877 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,SelfDestructingSolverStorable23 [2023-01-28 04:59:24,878 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:59:24,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:59:24,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1167412120, now seen corresponding path program 3 times [2023-01-28 04:59:24,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:59:24,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076358862] [2023-01-28 04:59:24,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:59:24,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:59:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:59:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:59:25,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:59:25,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076358862] [2023-01-28 04:59:25,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076358862] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:59:25,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026459364] [2023-01-28 04:59:25,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:59:25,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:59:25,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:59:25,653 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 04:59:25,669 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 04:59:25,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 04:59:25,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:59:25,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-28 04:59:25,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:59:26,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:26,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-01-28 04:59:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:59:26,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:59:26,219 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:26,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2023-01-28 04:59:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:59:26,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026459364] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:59:26,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:59:26,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 29 [2023-01-28 04:59:26,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582459910] [2023-01-28 04:59:26,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:59:26,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 04:59:26,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:59:26,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 04:59:26,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2023-01-28 04:59:26,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 281 [2023-01-28 04:59:26,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 731 transitions, 15450 flow. Second operand has 31 states, 31 states have (on average 74.2258064516129) internal successors, (2301), 31 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states 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 04:59:26,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:59:26,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 281 [2023-01-28 04:59:26,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:59:30,041 INFO L130 PetriNetUnfolder]: 7386/11234 cut-off events. [2023-01-28 04:59:30,041 INFO L131 PetriNetUnfolder]: For 204964/204964 co-relation queries the response was YES. [2023-01-28 04:59:30,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90800 conditions, 11234 events. 7386/11234 cut-off events. For 204964/204964 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 68778 event pairs, 2278 based on Foata normal form. 3/11236 useless extension candidates. Maximal degree in co-relation 89910. Up to 10321 conditions per place. [2023-01-28 04:59:30,165 INFO L137 encePairwiseOnDemand]: 268/281 looper letters, 680 selfloop transitions, 243 changer transitions 9/932 dead transitions. [2023-01-28 04:59:30,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 932 transitions, 19957 flow [2023-01-28 04:59:30,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 04:59:30,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 04:59:30,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2355 transitions. [2023-01-28 04:59:30,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2793594306049822 [2023-01-28 04:59:30,167 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2355 transitions. [2023-01-28 04:59:30,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2355 transitions. [2023-01-28 04:59:30,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:59:30,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2355 transitions. [2023-01-28 04:59:30,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 78.5) internal successors, (2355), 30 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states 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 04:59:30,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 281.0) internal successors, (8711), 31 states have internal predecessors, (8711), 0 states have call successors, (0), 0 states 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 04:59:30,177 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 281.0) internal successors, (8711), 31 states have internal predecessors, (8711), 0 states have call successors, (0), 0 states 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 04:59:30,177 INFO L175 Difference]: Start difference. First operand has 192 places, 731 transitions, 15450 flow. Second operand 30 states and 2355 transitions. [2023-01-28 04:59:30,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 932 transitions, 19957 flow [2023-01-28 04:59:31,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 932 transitions, 19536 flow, removed 56 selfloop flow, removed 4 redundant places. [2023-01-28 04:59:31,124 INFO L231 Difference]: Finished difference. Result has 229 places, 836 transitions, 17785 flow [2023-01-28 04:59:31,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=15098, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=17785, PETRI_PLACES=229, PETRI_TRANSITIONS=836} [2023-01-28 04:59:31,125 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 199 predicate places. [2023-01-28 04:59:31,125 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 836 transitions, 17785 flow [2023-01-28 04:59:31,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 74.2258064516129) internal successors, (2301), 31 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states 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 04:59:31,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:59:31,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:59:31,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-28 04:59:31,331 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,SelfDestructingSolverStorable24 [2023-01-28 04:59:31,331 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:59:31,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:59:31,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1848127373, now seen corresponding path program 12 times [2023-01-28 04:59:31,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:59:31,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677742489] [2023-01-28 04:59:31,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:59:31,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:59:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:59:31,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:59:31,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:59:31,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677742489] [2023-01-28 04:59:31,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677742489] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:59:31,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366879800] [2023-01-28 04:59:31,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:59:31,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:59:31,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:59:31,879 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 04:59:31,881 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 04:59:31,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 04:59:31,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:59:31,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 04:59:31,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:59:32,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:59:32,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:59:32,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-01-28 04:59:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:59:32,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:59:32,300 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:32,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 44 [2023-01-28 04:59:32,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-01-28 04:59:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:59:32,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366879800] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:59:32,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:59:32,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2023-01-28 04:59:32,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43290349] [2023-01-28 04:59:32,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:59:32,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 04:59:32,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:59:32,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 04:59:32,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=364, Unknown=8, NotChecked=0, Total=462 [2023-01-28 04:59:32,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 281 [2023-01-28 04:59:32,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 836 transitions, 17785 flow. Second operand has 22 states, 22 states have (on average 89.4090909090909) internal successors, (1967), 22 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states 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 04:59:32,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:59:32,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 281 [2023-01-28 04:59:32,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:59:34,711 INFO L130 PetriNetUnfolder]: 7146/10845 cut-off events. [2023-01-28 04:59:34,711 INFO L131 PetriNetUnfolder]: For 249166/250372 co-relation queries the response was YES. [2023-01-28 04:59:34,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93883 conditions, 10845 events. 7146/10845 cut-off events. For 249166/250372 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 68343 event pairs, 1711 based on Foata normal form. 989/11459 useless extension candidates. Maximal degree in co-relation 92946. Up to 9844 conditions per place. [2023-01-28 04:59:34,830 INFO L137 encePairwiseOnDemand]: 273/281 looper letters, 666 selfloop transitions, 194 changer transitions 1/884 dead transitions. [2023-01-28 04:59:34,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 884 transitions, 20198 flow [2023-01-28 04:59:34,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 04:59:34,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 04:59:34,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 771 transitions. [2023-01-28 04:59:34,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3429715302491103 [2023-01-28 04:59:34,832 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 771 transitions. [2023-01-28 04:59:34,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 771 transitions. [2023-01-28 04:59:34,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:59:34,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 771 transitions. [2023-01-28 04:59:34,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.375) internal successors, (771), 8 states have internal predecessors, (771), 0 states have call successors, (0), 0 states 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 04:59:34,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states 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 04:59:34,834 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states 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 04:59:34,834 INFO L175 Difference]: Start difference. First operand has 229 places, 836 transitions, 17785 flow. Second operand 8 states and 771 transitions. [2023-01-28 04:59:34,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 884 transitions, 20198 flow [2023-01-28 04:59:35,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 884 transitions, 19717 flow, removed 210 selfloop flow, removed 4 redundant places. [2023-01-28 04:59:36,008 INFO L231 Difference]: Finished difference. Result has 235 places, 857 transitions, 18316 flow [2023-01-28 04:59:36,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=17304, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18316, PETRI_PLACES=235, PETRI_TRANSITIONS=857} [2023-01-28 04:59:36,009 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 205 predicate places. [2023-01-28 04:59:36,009 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 857 transitions, 18316 flow [2023-01-28 04:59:36,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 89.4090909090909) internal successors, (1967), 22 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states 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 04:59:36,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:59:36,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:59:36,019 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 04:59:36,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-28 04:59:36,216 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:59:36,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:59:36,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1235847092, now seen corresponding path program 4 times [2023-01-28 04:59:36,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:59:36,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325574827] [2023-01-28 04:59:36,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:59:36,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:59:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:59:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:59:36,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:59:36,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325574827] [2023-01-28 04:59:36,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325574827] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:59:36,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845668220] [2023-01-28 04:59:36,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:59:36,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:59:36,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:59:36,954 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 04:59:36,956 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 04:59:37,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:59:37,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:59:37,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 04:59:37,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:59:37,339 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 04:59:37,340 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:37,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-01-28 04:59:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:59:37,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:59:37,511 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:37,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2023-01-28 04:59:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:59:37,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845668220] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:59:37,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:59:37,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 25 [2023-01-28 04:59:37,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450877098] [2023-01-28 04:59:37,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:59:37,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 04:59:37,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:59:37,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 04:59:37,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2023-01-28 04:59:37,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 281 [2023-01-28 04:59:37,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 857 transitions, 18316 flow. Second operand has 27 states, 27 states have (on average 74.29629629629629) internal successors, (2006), 27 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states 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 04:59:37,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:59:37,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 281 [2023-01-28 04:59:37,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:59:42,432 INFO L130 PetriNetUnfolder]: 9632/15047 cut-off events. [2023-01-28 04:59:42,433 INFO L131 PetriNetUnfolder]: For 296878/296878 co-relation queries the response was YES. [2023-01-28 04:59:42,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122212 conditions, 15047 events. 9632/15047 cut-off events. For 296878/296878 co-relation queries the response was YES. Maximal size of possible extension queue 917. Compared 102449 event pairs, 1699 based on Foata normal form. 5/15052 useless extension candidates. Maximal degree in co-relation 121416. Up to 9681 conditions per place. [2023-01-28 04:59:42,569 INFO L137 encePairwiseOnDemand]: 266/281 looper letters, 692 selfloop transitions, 588 changer transitions 21/1301 dead transitions. [2023-01-28 04:59:42,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 1301 transitions, 28575 flow [2023-01-28 04:59:42,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 04:59:42,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 04:59:42,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2738 transitions. [2023-01-28 04:59:42,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2783934926283681 [2023-01-28 04:59:42,573 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2738 transitions. [2023-01-28 04:59:42,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2738 transitions. [2023-01-28 04:59:42,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:59:42,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2738 transitions. [2023-01-28 04:59:42,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 78.22857142857143) internal successors, (2738), 35 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states 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 04:59:42,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 281.0) internal successors, (10116), 36 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states 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 04:59:42,583 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 281.0) internal successors, (10116), 36 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states 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 04:59:42,583 INFO L175 Difference]: Start difference. First operand has 235 places, 857 transitions, 18316 flow. Second operand 35 states and 2738 transitions. [2023-01-28 04:59:42,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 1301 transitions, 28575 flow [2023-01-28 04:59:44,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 1301 transitions, 28089 flow, removed 163 selfloop flow, removed 3 redundant places. [2023-01-28 04:59:44,435 INFO L231 Difference]: Finished difference. Result has 274 places, 1159 transitions, 25995 flow [2023-01-28 04:59:44,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=17901, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=25995, PETRI_PLACES=274, PETRI_TRANSITIONS=1159} [2023-01-28 04:59:44,435 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 244 predicate places. [2023-01-28 04:59:44,436 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 1159 transitions, 25995 flow [2023-01-28 04:59:44,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 74.29629629629629) internal successors, (2006), 27 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states 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 04:59:44,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:59:44,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:59:44,441 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 04:59:44,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:59:44,636 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:59:44,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:59:44,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1307997402, now seen corresponding path program 5 times [2023-01-28 04:59:44,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:59:44,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859220415] [2023-01-28 04:59:44,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:59:44,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:59:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:59:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:59:45,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:59:45,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859220415] [2023-01-28 04:59:45,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859220415] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:59:45,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407405345] [2023-01-28 04:59:45,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:59:45,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:59:45,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:59:45,101 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 04:59:45,122 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 04:59:45,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:59:45,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:59:45,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-28 04:59:45,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:59:45,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-01-28 04:59:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:59:45,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:59:45,588 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:45,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2023-01-28 04:59:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:59:45,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407405345] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:59:45,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:59:45,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2023-01-28 04:59:45,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765276080] [2023-01-28 04:59:45,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:59:45,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 04:59:45,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:59:45,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 04:59:45,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2023-01-28 04:59:45,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 281 [2023-01-28 04:59:45,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 1159 transitions, 25995 flow. Second operand has 25 states, 25 states have (on average 84.76) internal successors, (2119), 25 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states 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 04:59:45,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:59:45,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 281 [2023-01-28 04:59:45,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:59:53,004 INFO L130 PetriNetUnfolder]: 11238/17471 cut-off events. [2023-01-28 04:59:53,005 INFO L131 PetriNetUnfolder]: For 377512/377512 co-relation queries the response was YES. [2023-01-28 04:59:53,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149104 conditions, 17471 events. 11238/17471 cut-off events. For 377512/377512 co-relation queries the response was YES. Maximal size of possible extension queue 1024. Compared 119852 event pairs, 1855 based on Foata normal form. 12/17483 useless extension candidates. Maximal degree in co-relation 149001. Up to 11784 conditions per place. [2023-01-28 04:59:53,188 INFO L137 encePairwiseOnDemand]: 268/281 looper letters, 839 selfloop transitions, 727 changer transitions 13/1579 dead transitions. [2023-01-28 04:59:53,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 1579 transitions, 34845 flow [2023-01-28 04:59:53,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-01-28 04:59:53,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-01-28 04:59:53,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4323 transitions. [2023-01-28 04:59:53,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3205071174377224 [2023-01-28 04:59:53,194 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4323 transitions. [2023-01-28 04:59:53,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4323 transitions. [2023-01-28 04:59:53,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:59:53,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4323 transitions. [2023-01-28 04:59:53,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 90.0625) internal successors, (4323), 48 states have internal predecessors, (4323), 0 states have call successors, (0), 0 states 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 04:59:53,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 281.0) internal successors, (13769), 49 states have internal predecessors, (13769), 0 states have call successors, (0), 0 states 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 04:59:53,209 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 281.0) internal successors, (13769), 49 states have internal predecessors, (13769), 0 states have call successors, (0), 0 states 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 04:59:53,209 INFO L175 Difference]: Start difference. First operand has 274 places, 1159 transitions, 25995 flow. Second operand 48 states and 4323 transitions. [2023-01-28 04:59:53,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 1579 transitions, 34845 flow [2023-01-28 04:59:55,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 1579 transitions, 34440 flow, removed 163 selfloop flow, removed 8 redundant places. [2023-01-28 04:59:55,509 INFO L231 Difference]: Finished difference. Result has 322 places, 1373 transitions, 31877 flow [2023-01-28 04:59:55,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=25634, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=533, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=31877, PETRI_PLACES=322, PETRI_TRANSITIONS=1373} [2023-01-28 04:59:55,510 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 292 predicate places. [2023-01-28 04:59:55,510 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 1373 transitions, 31877 flow [2023-01-28 04:59:55,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.76) internal successors, (2119), 25 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states 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 04:59:55,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:59:55,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:59:55,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-01-28 04:59:55,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-28 04:59:55,716 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:59:55,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:59:55,716 INFO L85 PathProgramCache]: Analyzing trace with hash -685848021, now seen corresponding path program 13 times [2023-01-28 04:59:55,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:59:55,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658651244] [2023-01-28 04:59:55,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:59:55,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:59:55,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:59:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:59:56,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:59:56,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658651244] [2023-01-28 04:59:56,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658651244] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:59:56,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601022265] [2023-01-28 04:59:56,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:59:56,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:59:56,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:59:56,173 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:59:56,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 04:59:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:59:56,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 04:59:56,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:59:56,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 04:59:56,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 04:59:56,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 04:59:56,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:59:56,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:59:56,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-01-28 04:59:56,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:59:56,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:59:56,680 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1210 (Array Int Int))) (= (mod (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1210) c_~A~0.base) c_~A~0.offset) c_~sum1~0) 4294967296) (mod (+ (select (select |c_#memory_int| c_~A~0.base) (+ (* c_thread2Thread1of1ForFork0_~i~1 4) c_~A~0.offset)) c_~sum3~0 c_~sum2~0) 4294967296))) is different from false [2023-01-28 04:59:56,767 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1208 (Array Int Int)) (v_ArrVal_1210 (Array Int Int)) (v_ArrVal_1209 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1208) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1209))) (= (mod (+ c_~sum3~0 c_~sum2~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.offset|)) 4294967296) (mod (+ c_~sum1~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1210) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.offset|)) 4294967296)))) is different from false [2023-01-28 04:59:56,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:56,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 48 [2023-01-28 04:59:56,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 846 treesize of output 798 [2023-01-28 04:59:56,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 180 [2023-01-28 04:59:56,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 172 [2023-01-28 04:59:56,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 82 [2023-01-28 04:59:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-01-28 04:59:57,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601022265] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:59:57,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:59:57,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-01-28 04:59:57,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075841272] [2023-01-28 04:59:57,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:59:57,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 04:59:57,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:59:57,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 04:59:57,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=456, Unknown=20, NotChecked=94, Total=702 [2023-01-28 04:59:57,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 281 [2023-01-28 04:59:57,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 1373 transitions, 31877 flow. Second operand has 27 states, 27 states have (on average 85.44444444444444) internal successors, (2307), 27 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states 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 04:59:57,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:59:57,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 281 [2023-01-28 04:59:57,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:59:57,530 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1210 (Array Int Int)) (v_ArrVal_1209 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1209))) (= (mod (+ c_~sum1~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1210) c_~A~0.base) c_~A~0.offset)) 4294967296) (mod (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~sum3~0 c_~sum2~0) 4294967296)))) (= c_~sum3~0 0) (forall ((v_ArrVal_1210 (Array Int Int))) (= (mod (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~sum3~0 c_~sum2~0) 4294967296) (mod (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1210) c_~A~0.base) c_~A~0.offset) c_~sum1~0) 4294967296))) (= c_~sum1~0 c_~sum2~0)) is different from false [2023-01-28 05:00:02,589 INFO L130 PetriNetUnfolder]: 10697/16580 cut-off events. [2023-01-28 05:00:02,589 INFO L131 PetriNetUnfolder]: For 462165/464191 co-relation queries the response was YES. [2023-01-28 05:00:02,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153571 conditions, 16580 events. 10697/16580 cut-off events. For 462165/464191 co-relation queries the response was YES. Maximal size of possible extension queue 1150. Compared 115477 event pairs, 2982 based on Foata normal form. 1629/17661 useless extension candidates. Maximal degree in co-relation 153457. Up to 15584 conditions per place. [2023-01-28 05:00:02,784 INFO L137 encePairwiseOnDemand]: 267/281 looper letters, 1203 selfloop transitions, 214 changer transitions 1/1447 dead transitions. [2023-01-28 05:00:02,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 1447 transitions, 35900 flow [2023-01-28 05:00:02,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 05:00:02,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 05:00:02,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 830 transitions. [2023-01-28 05:00:02,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32819296164491896 [2023-01-28 05:00:02,786 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 830 transitions. [2023-01-28 05:00:02,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 830 transitions. [2023-01-28 05:00:02,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:00:02,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 830 transitions. [2023-01-28 05:00:02,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 92.22222222222223) internal successors, (830), 9 states have internal predecessors, (830), 0 states have call successors, (0), 0 states 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 05:00:02,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 281.0) internal successors, (2810), 10 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states 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 05:00:02,789 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 281.0) internal successors, (2810), 10 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states 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 05:00:02,789 INFO L175 Difference]: Start difference. First operand has 322 places, 1373 transitions, 31877 flow. Second operand 9 states and 830 transitions. [2023-01-28 05:00:02,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 1447 transitions, 35900 flow [2023-01-28 05:00:06,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 1447 transitions, 33860 flow, removed 827 selfloop flow, removed 19 redundant places. [2023-01-28 05:00:06,073 INFO L231 Difference]: Finished difference. Result has 314 places, 1406 transitions, 31161 flow [2023-01-28 05:00:06,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=29924, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=31161, PETRI_PLACES=314, PETRI_TRANSITIONS=1406} [2023-01-28 05:00:06,074 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 284 predicate places. [2023-01-28 05:00:06,074 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 1406 transitions, 31161 flow [2023-01-28 05:00:06,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 85.44444444444444) internal successors, (2307), 27 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states 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 05:00:06,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:00:06,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:00:06,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-28 05:00:06,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-28 05:00:06,277 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:00:06,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:00:06,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1046960449, now seen corresponding path program 14 times [2023-01-28 05:00:06,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:00:06,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973021029] [2023-01-28 05:00:06,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:00:06,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:00:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:00:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:00:06,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:00:06,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973021029] [2023-01-28 05:00:06,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973021029] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:00:06,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378542205] [2023-01-28 05:00:06,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:00:06,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:00:06,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:00:06,837 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:00:06,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-28 05:00:06,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:00:06,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:00:07,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 30 conjunts are in the unsatisfiable core [2023-01-28 05:00:07,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:00:07,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:00:07,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 05:00:07,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-01-28 05:00:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:00:07,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:00:07,259 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1255 (Array Int Int))) (= (mod (+ c_~sum3~0 c_~sum2~0) 4294967296) (mod (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1255) c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork2_~i~0 4))) c_~sum1~0) 4294967296))) is different from false [2023-01-28 05:00:07,268 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:00:07,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 48 [2023-01-28 05:00:07,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2023-01-28 05:00:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:00:07,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378542205] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:00:07,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:00:07,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2023-01-28 05:00:07,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912315674] [2023-01-28 05:00:07,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:00:07,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 05:00:07,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:00:07,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 05:00:07,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=391, Unknown=1, NotChecked=42, Total=552 [2023-01-28 05:00:07,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 281 [2023-01-28 05:00:07,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 1406 transitions, 31161 flow. Second operand has 24 states, 24 states have (on average 89.75) internal successors, (2154), 24 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states 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 05:00:07,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:00:07,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 281 [2023-01-28 05:00:07,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:00:12,986 INFO L130 PetriNetUnfolder]: 10734/16644 cut-off events. [2023-01-28 05:00:12,987 INFO L131 PetriNetUnfolder]: For 448722/450970 co-relation queries the response was YES. [2023-01-28 05:00:13,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153872 conditions, 16644 events. 10734/16644 cut-off events. For 448722/450970 co-relation queries the response was YES. Maximal size of possible extension queue 1142. Compared 115824 event pairs, 2960 based on Foata normal form. 1734/17921 useless extension candidates. Maximal degree in co-relation 153756. Up to 15508 conditions per place. [2023-01-28 05:00:13,191 INFO L137 encePairwiseOnDemand]: 273/281 looper letters, 1202 selfloop transitions, 220 changer transitions 1/1452 dead transitions. [2023-01-28 05:00:13,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 1452 transitions, 34641 flow [2023-01-28 05:00:13,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 05:00:13,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 05:00:13,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 770 transitions. [2023-01-28 05:00:13,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34252669039145905 [2023-01-28 05:00:13,193 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 770 transitions. [2023-01-28 05:00:13,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 770 transitions. [2023-01-28 05:00:13,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:00:13,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 770 transitions. [2023-01-28 05:00:13,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 96.25) internal successors, (770), 8 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 05:00:13,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states 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 05:00:13,195 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states 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 05:00:13,196 INFO L175 Difference]: Start difference. First operand has 314 places, 1406 transitions, 31161 flow. Second operand 8 states and 770 transitions. [2023-01-28 05:00:13,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 1452 transitions, 34641 flow [2023-01-28 05:00:16,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 1452 transitions, 34080 flow, removed 165 selfloop flow, removed 5 redundant places. [2023-01-28 05:00:16,047 INFO L231 Difference]: Finished difference. Result has 317 places, 1410 transitions, 31242 flow [2023-01-28 05:00:16,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=30600, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=31242, PETRI_PLACES=317, PETRI_TRANSITIONS=1410} [2023-01-28 05:00:16,048 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 287 predicate places. [2023-01-28 05:00:16,048 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 1410 transitions, 31242 flow [2023-01-28 05:00:16,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 89.75) internal successors, (2154), 24 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states 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 05:00:16,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:00:16,048 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:00:16,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-28 05:00:16,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:00:16,255 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:00:16,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:00:16,256 INFO L85 PathProgramCache]: Analyzing trace with hash 733859713, now seen corresponding path program 6 times [2023-01-28 05:00:16,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:00:16,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602695780] [2023-01-28 05:00:16,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:00:16,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:00:16,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:00:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:00:16,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:00:16,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602695780] [2023-01-28 05:00:16,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602695780] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:00:16,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041243397] [2023-01-28 05:00:16,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:00:16,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:00:16,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:00:16,341 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:00:16,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-28 05:00:16,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 05:00:16,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:00:16,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 05:00:16,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:00:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:00:16,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:00:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:00:16,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041243397] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:00:16,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:00:16,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-28 05:00:16,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203730647] [2023-01-28 05:00:16,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:00:16,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 05:00:16,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:00:16,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 05:00:16,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-01-28 05:00:16,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 281 [2023-01-28 05:00:16,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 1410 transitions, 31242 flow. Second operand has 14 states, 14 states have (on average 115.92857142857143) internal successors, (1623), 14 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states 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 05:00:16,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:00:16,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 281 [2023-01-28 05:00:16,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:00:22,002 INFO L130 PetriNetUnfolder]: 10749/16657 cut-off events. [2023-01-28 05:00:22,002 INFO L131 PetriNetUnfolder]: For 467886/470686 co-relation queries the response was YES. [2023-01-28 05:00:22,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154469 conditions, 16657 events. 10749/16657 cut-off events. For 467886/470686 co-relation queries the response was YES. Maximal size of possible extension queue 1233. Compared 117460 event pairs, 3363 based on Foata normal form. 2271/18209 useless extension candidates. Maximal degree in co-relation 154352. Up to 12014 conditions per place. [2023-01-28 05:00:22,328 INFO L137 encePairwiseOnDemand]: 276/281 looper letters, 1350 selfloop transitions, 131 changer transitions 0/1538 dead transitions. [2023-01-28 05:00:22,328 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 1538 transitions, 35471 flow [2023-01-28 05:00:22,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 05:00:22,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 05:00:22,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 856 transitions. [2023-01-28 05:00:22,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4351804778851042 [2023-01-28 05:00:22,330 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 856 transitions. [2023-01-28 05:00:22,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 856 transitions. [2023-01-28 05:00:22,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:00:22,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 856 transitions. [2023-01-28 05:00:22,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 122.28571428571429) internal successors, (856), 7 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 05:00:22,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 281.0) internal successors, (2248), 8 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 05:00:22,332 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 281.0) internal successors, (2248), 8 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 05:00:22,332 INFO L175 Difference]: Start difference. First operand has 317 places, 1410 transitions, 31242 flow. Second operand 7 states and 856 transitions. [2023-01-28 05:00:22,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 1538 transitions, 35471 flow [2023-01-28 05:00:25,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 1538 transitions, 34907 flow, removed 72 selfloop flow, removed 6 redundant places. [2023-01-28 05:00:25,514 INFO L231 Difference]: Finished difference. Result has 320 places, 1332 transitions, 28677 flow [2023-01-28 05:00:25,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=27216, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=28677, PETRI_PLACES=320, PETRI_TRANSITIONS=1332} [2023-01-28 05:00:25,515 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 290 predicate places. [2023-01-28 05:00:25,515 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 1332 transitions, 28677 flow [2023-01-28 05:00:25,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 115.92857142857143) internal successors, (1623), 14 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states 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 05:00:25,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:00:25,516 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:00:25,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-01-28 05:00:25,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:00:25,717 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:00:25,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:00:25,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1874748204, now seen corresponding path program 15 times [2023-01-28 05:00:25,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:00:25,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661908018] [2023-01-28 05:00:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:00:25,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:00:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:00:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:00:25,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:00:25,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661908018] [2023-01-28 05:00:25,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661908018] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:00:25,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499884137] [2023-01-28 05:00:25,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:00:25,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:00:25,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:00:25,805 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:00:25,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-28 05:00:25,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 05:00:25,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:00:25,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 05:00:25,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:00:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:00:25,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:00:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:00:26,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499884137] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:00:26,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:00:26,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-28 05:00:26,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202743278] [2023-01-28 05:00:26,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:00:26,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 05:00:26,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:00:26,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 05:00:26,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-01-28 05:00:26,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 281 [2023-01-28 05:00:26,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 1332 transitions, 28677 flow. Second operand has 14 states, 14 states have (on average 115.57142857142857) internal successors, (1618), 14 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states 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 05:00:26,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:00:26,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 281 [2023-01-28 05:00:26,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:00:30,859 INFO L130 PetriNetUnfolder]: 9725/15447 cut-off events. [2023-01-28 05:00:30,859 INFO L131 PetriNetUnfolder]: For 451217/453786 co-relation queries the response was YES. [2023-01-28 05:00:30,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143722 conditions, 15447 events. 9725/15447 cut-off events. For 451217/453786 co-relation queries the response was YES. Maximal size of possible extension queue 1157. Compared 111935 event pairs, 2568 based on Foata normal form. 2458/17378 useless extension candidates. Maximal degree in co-relation 143602. Up to 9370 conditions per place. [2023-01-28 05:00:31,031 INFO L137 encePairwiseOnDemand]: 275/281 looper letters, 1245 selfloop transitions, 123 changer transitions 12/1437 dead transitions. [2023-01-28 05:00:31,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 1437 transitions, 33402 flow [2023-01-28 05:00:31,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 05:00:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 05:00:31,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 976 transitions. [2023-01-28 05:00:31,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43416370106761565 [2023-01-28 05:00:31,033 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 976 transitions. [2023-01-28 05:00:31,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 976 transitions. [2023-01-28 05:00:31,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:00:31,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 976 transitions. [2023-01-28 05:00:31,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 122.0) internal successors, (976), 8 states have internal predecessors, (976), 0 states have call successors, (0), 0 states 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 05:00:31,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states 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 05:00:31,036 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states 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 05:00:31,036 INFO L175 Difference]: Start difference. First operand has 320 places, 1332 transitions, 28677 flow. Second operand 8 states and 976 transitions. [2023-01-28 05:00:31,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 1437 transitions, 33402 flow [2023-01-28 05:00:33,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 1437 transitions, 33101 flow, removed 133 selfloop flow, removed 5 redundant places. [2023-01-28 05:00:33,791 INFO L231 Difference]: Finished difference. Result has 324 places, 1224 transitions, 26952 flow [2023-01-28 05:00:33,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=26713, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=26952, PETRI_PLACES=324, PETRI_TRANSITIONS=1224} [2023-01-28 05:00:33,793 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 294 predicate places. [2023-01-28 05:00:33,793 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 1224 transitions, 26952 flow [2023-01-28 05:00:33,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 115.57142857142857) internal successors, (1618), 14 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states 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 05:00:33,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:00:33,793 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:00:33,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-01-28 05:00:33,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:00:33,994 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:00:33,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:00:33,994 INFO L85 PathProgramCache]: Analyzing trace with hash -603673828, now seen corresponding path program 16 times [2023-01-28 05:00:33,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:00:33,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165239950] [2023-01-28 05:00:33,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:00:33,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:00:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:00:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:00:34,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:00:34,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165239950] [2023-01-28 05:00:34,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165239950] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:00:34,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022216912] [2023-01-28 05:00:34,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:00:34,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:00:34,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:00:34,099 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:00:34,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-28 05:00:34,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:00:34,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:00:34,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-28 05:00:34,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:00:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:00:34,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:00:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:00:34,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022216912] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:00:34,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:00:34,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2023-01-28 05:00:34,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603373115] [2023-01-28 05:00:34,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:00:34,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 05:00:34,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:00:34,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 05:00:34,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-01-28 05:00:34,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 281 [2023-01-28 05:00:34,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 1224 transitions, 26952 flow. Second operand has 19 states, 19 states have (on average 106.73684210526316) internal successors, (2028), 19 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states 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 05:00:34,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:00:34,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 281 [2023-01-28 05:00:34,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:00:40,776 INFO L130 PetriNetUnfolder]: 10625/17208 cut-off events. [2023-01-28 05:00:40,776 INFO L131 PetriNetUnfolder]: For 465321/465321 co-relation queries the response was YES. [2023-01-28 05:00:40,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154716 conditions, 17208 events. 10625/17208 cut-off events. For 465321/465321 co-relation queries the response was YES. Maximal size of possible extension queue 1030. Compared 125862 event pairs, 1666 based on Foata normal form. 949/18157 useless extension candidates. Maximal degree in co-relation 154597. Up to 5061 conditions per place. [2023-01-28 05:00:41,009 INFO L137 encePairwiseOnDemand]: 272/281 looper letters, 1006 selfloop transitions, 709 changer transitions 163/1878 dead transitions. [2023-01-28 05:00:41,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1878 transitions, 41488 flow [2023-01-28 05:00:41,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-28 05:00:41,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-28 05:00:41,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 4308 transitions. [2023-01-28 05:00:41,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034463382655928 [2023-01-28 05:00:41,014 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 4308 transitions. [2023-01-28 05:00:41,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 4308 transitions. [2023-01-28 05:00:41,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:00:41,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 4308 transitions. [2023-01-28 05:00:41,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 113.36842105263158) internal successors, (4308), 38 states have internal predecessors, (4308), 0 states have call successors, (0), 0 states 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 05:00:41,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 281.0) internal successors, (10959), 39 states have internal predecessors, (10959), 0 states have call successors, (0), 0 states 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 05:00:41,032 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 281.0) internal successors, (10959), 39 states have internal predecessors, (10959), 0 states have call successors, (0), 0 states 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 05:00:41,032 INFO L175 Difference]: Start difference. First operand has 324 places, 1224 transitions, 26952 flow. Second operand 38 states and 4308 transitions. [2023-01-28 05:00:41,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1878 transitions, 41488 flow [2023-01-28 05:00:44,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1878 transitions, 40325 flow, removed 25 selfloop flow, removed 6 redundant places. [2023-01-28 05:00:44,221 INFO L231 Difference]: Finished difference. Result has 367 places, 1246 transitions, 28198 flow [2023-01-28 05:00:44,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=24722, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=489, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=28198, PETRI_PLACES=367, PETRI_TRANSITIONS=1246} [2023-01-28 05:00:44,223 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 337 predicate places. [2023-01-28 05:00:44,223 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 1246 transitions, 28198 flow [2023-01-28 05:00:44,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.73684210526316) internal successors, (2028), 19 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states 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 05:00:44,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:00:44,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:00:44,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-28 05:00:44,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:00:44,424 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:00:44,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:00:44,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1107750121, now seen corresponding path program 1 times [2023-01-28 05:00:44,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:00:44,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312871911] [2023-01-28 05:00:44,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:00:44,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:00:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:00:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:00:44,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:00:44,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312871911] [2023-01-28 05:00:44,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312871911] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:00:44,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043099792] [2023-01-28 05:00:44,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:00:44,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:00:44,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:00:44,517 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:00:44,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-28 05:00:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:00:44,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 05:00:44,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:00:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:00:44,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:00:44,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:00:44,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043099792] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:00:44,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:00:44,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 05:00:44,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019935345] [2023-01-28 05:00:44,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:00:44,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 05:00:44,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:00:44,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 05:00:44,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-01-28 05:00:44,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 281 [2023-01-28 05:00:44,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 1246 transitions, 28198 flow. Second operand has 16 states, 16 states have (on average 107.25) internal successors, (1716), 16 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states 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 05:00:44,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:00:44,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 281 [2023-01-28 05:00:44,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:00:50,035 INFO L130 PetriNetUnfolder]: 9674/15796 cut-off events. [2023-01-28 05:00:50,036 INFO L131 PetriNetUnfolder]: For 490776/490836 co-relation queries the response was YES. [2023-01-28 05:00:50,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150119 conditions, 15796 events. 9674/15796 cut-off events. For 490776/490836 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 115870 event pairs, 1491 based on Foata normal form. 432/16215 useless extension candidates. Maximal degree in co-relation 149986. Up to 4918 conditions per place. [2023-01-28 05:00:50,259 INFO L137 encePairwiseOnDemand]: 273/281 looper letters, 1100 selfloop transitions, 250 changer transitions 76/1493 dead transitions. [2023-01-28 05:00:50,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 1493 transitions, 34970 flow [2023-01-28 05:00:50,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 05:00:50,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 05:00:50,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1375 transitions. [2023-01-28 05:00:50,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40776986951364175 [2023-01-28 05:00:50,261 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1375 transitions. [2023-01-28 05:00:50,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1375 transitions. [2023-01-28 05:00:50,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:00:50,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1375 transitions. [2023-01-28 05:00:50,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 114.58333333333333) internal successors, (1375), 12 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states 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 05:00:50,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 281.0) internal successors, (3653), 13 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states 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 05:00:50,264 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 281.0) internal successors, (3653), 13 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states 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 05:00:50,264 INFO L175 Difference]: Start difference. First operand has 367 places, 1246 transitions, 28198 flow. Second operand 12 states and 1375 transitions. [2023-01-28 05:00:50,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 1493 transitions, 34970 flow [2023-01-28 05:00:54,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 1493 transitions, 32569 flow, removed 690 selfloop flow, removed 16 redundant places. [2023-01-28 05:00:54,214 INFO L231 Difference]: Finished difference. Result has 358 places, 1195 transitions, 25901 flow [2023-01-28 05:00:54,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=25808, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=995, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=25901, PETRI_PLACES=358, PETRI_TRANSITIONS=1195} [2023-01-28 05:00:54,215 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 328 predicate places. [2023-01-28 05:00:54,216 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 1195 transitions, 25901 flow [2023-01-28 05:00:54,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 107.25) internal successors, (1716), 16 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states 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 05:00:54,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:00:54,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:00:54,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-28 05:00:54,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-01-28 05:00:54,416 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:00:54,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:00:54,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1948873199, now seen corresponding path program 2 times [2023-01-28 05:00:54,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:00:54,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055832566] [2023-01-28 05:00:54,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:00:54,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:00:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:00:54,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:00:54,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:00:54,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055832566] [2023-01-28 05:00:54,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055832566] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:00:54,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281427136] [2023-01-28 05:00:54,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:00:54,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:00:54,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:00:54,502 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:00:54,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-28 05:00:54,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:00:54,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:00:54,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 05:00:54,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:00:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:00:54,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:00:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:00:54,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281427136] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:00:54,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:00:54,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-28 05:00:54,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945987176] [2023-01-28 05:00:54,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:00:54,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 05:00:54,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:00:54,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 05:00:54,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-01-28 05:00:54,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 281 [2023-01-28 05:00:54,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 1195 transitions, 25901 flow. Second operand has 17 states, 17 states have (on average 107.17647058823529) internal successors, (1822), 17 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states 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 05:00:54,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:00:54,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 281 [2023-01-28 05:00:54,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:01:00,270 INFO L130 PetriNetUnfolder]: 9776/16010 cut-off events. [2023-01-28 05:01:00,271 INFO L131 PetriNetUnfolder]: For 420026/420052 co-relation queries the response was YES. [2023-01-28 05:01:00,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145691 conditions, 16010 events. 9776/16010 cut-off events. For 420026/420052 co-relation queries the response was YES. Maximal size of possible extension queue 1020. Compared 117637 event pairs, 704 based on Foata normal form. 297/16299 useless extension candidates. Maximal degree in co-relation 145561. Up to 3834 conditions per place. [2023-01-28 05:01:00,444 INFO L137 encePairwiseOnDemand]: 271/281 looper letters, 1312 selfloop transitions, 404 changer transitions 48/1831 dead transitions. [2023-01-28 05:01:00,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1831 transitions, 39190 flow [2023-01-28 05:01:00,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 05:01:00,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 05:01:00,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2065 transitions. [2023-01-28 05:01:00,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082641360221431 [2023-01-28 05:01:00,447 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2065 transitions. [2023-01-28 05:01:00,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2065 transitions. [2023-01-28 05:01:00,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:01:00,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2065 transitions. [2023-01-28 05:01:00,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 114.72222222222223) internal successors, (2065), 18 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states 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 05:01:00,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 281.0) internal successors, (5339), 19 states have internal predecessors, (5339), 0 states have call successors, (0), 0 states 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 05:01:00,452 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 281.0) internal successors, (5339), 19 states have internal predecessors, (5339), 0 states have call successors, (0), 0 states 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 05:01:00,452 INFO L175 Difference]: Start difference. First operand has 358 places, 1195 transitions, 25901 flow. Second operand 18 states and 2065 transitions. [2023-01-28 05:01:00,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1831 transitions, 39190 flow [2023-01-28 05:01:04,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1831 transitions, 38556 flow, removed 219 selfloop flow, removed 10 redundant places. [2023-01-28 05:01:04,305 INFO L231 Difference]: Finished difference. Result has 366 places, 1314 transitions, 28944 flow [2023-01-28 05:01:04,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=25539, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=903, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=28944, PETRI_PLACES=366, PETRI_TRANSITIONS=1314} [2023-01-28 05:01:04,307 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 336 predicate places. [2023-01-28 05:01:04,307 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 1314 transitions, 28944 flow [2023-01-28 05:01:04,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 107.17647058823529) internal successors, (1822), 17 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states 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 05:01:04,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:01:04,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:01:04,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-01-28 05:01:04,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:01:04,508 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:01:04,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:01:04,508 INFO L85 PathProgramCache]: Analyzing trace with hash 309831173, now seen corresponding path program 3 times [2023-01-28 05:01:04,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:01:04,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085502178] [2023-01-28 05:01:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:01:04,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:01:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:01:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:01:04,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:01:04,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085502178] [2023-01-28 05:01:04,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085502178] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:01:04,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014061251] [2023-01-28 05:01:04,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:01:04,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:01:04,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:01:04,611 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:01:04,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-28 05:01:04,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 05:01:04,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:01:04,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 05:01:04,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:01:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:01:04,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:01:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:01:04,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014061251] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:01:04,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:01:04,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-28 05:01:04,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5445908] [2023-01-28 05:01:04,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:01:04,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 05:01:04,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:01:04,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 05:01:04,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-01-28 05:01:04,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 281 [2023-01-28 05:01:04,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 1314 transitions, 28944 flow. Second operand has 18 states, 18 states have (on average 107.05555555555556) internal successors, (1927), 18 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states 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 05:01:04,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:01:04,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 281 [2023-01-28 05:01:04,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:01:10,502 INFO L130 PetriNetUnfolder]: 9720/15732 cut-off events. [2023-01-28 05:01:10,502 INFO L131 PetriNetUnfolder]: For 440112/440151 co-relation queries the response was YES. [2023-01-28 05:01:10,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152308 conditions, 15732 events. 9720/15732 cut-off events. For 440112/440151 co-relation queries the response was YES. Maximal size of possible extension queue 999. Compared 113062 event pairs, 759 based on Foata normal form. 294/16018 useless extension candidates. Maximal degree in co-relation 152179. Up to 3722 conditions per place. [2023-01-28 05:01:10,675 INFO L137 encePairwiseOnDemand]: 272/281 looper letters, 1195 selfloop transitions, 418 changer transitions 22/1702 dead transitions. [2023-01-28 05:01:10,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1702 transitions, 37309 flow [2023-01-28 05:01:10,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 05:01:10,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 05:01:10,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1936 transitions. [2023-01-28 05:01:10,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40527527737073477 [2023-01-28 05:01:10,677 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1936 transitions. [2023-01-28 05:01:10,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1936 transitions. [2023-01-28 05:01:10,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:01:10,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1936 transitions. [2023-01-28 05:01:10,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 113.88235294117646) internal successors, (1936), 17 states have internal predecessors, (1936), 0 states have call successors, (0), 0 states 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 05:01:10,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 281.0) internal successors, (5058), 18 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states 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 05:01:10,683 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 281.0) internal successors, (5058), 18 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states 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 05:01:10,683 INFO L175 Difference]: Start difference. First operand has 366 places, 1314 transitions, 28944 flow. Second operand 17 states and 1936 transitions. [2023-01-28 05:01:10,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1702 transitions, 37309 flow [2023-01-28 05:01:15,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1702 transitions, 36214 flow, removed 252 selfloop flow, removed 13 redundant places. [2023-01-28 05:01:15,049 INFO L231 Difference]: Finished difference. Result has 370 places, 1299 transitions, 28440 flow [2023-01-28 05:01:15,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=25961, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=884, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=28440, PETRI_PLACES=370, PETRI_TRANSITIONS=1299} [2023-01-28 05:01:15,051 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 340 predicate places. [2023-01-28 05:01:15,051 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 1299 transitions, 28440 flow [2023-01-28 05:01:15,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 107.05555555555556) internal successors, (1927), 18 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states 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 05:01:15,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:01:15,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:01:15,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-01-28 05:01:15,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:01:15,252 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:01:15,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:01:15,252 INFO L85 PathProgramCache]: Analyzing trace with hash 292875277, now seen corresponding path program 4 times [2023-01-28 05:01:15,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:01:15,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093505138] [2023-01-28 05:01:15,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:01:15,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:01:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:01:15,344 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 05:01:15,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:01:15,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093505138] [2023-01-28 05:01:15,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093505138] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:01:15,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086632273] [2023-01-28 05:01:15,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:01:15,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:01:15,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:01:15,349 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:01:15,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-28 05:01:15,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:01:15,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:01:15,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 05:01:15,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:01:15,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:01:15,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:01:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:01:15,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086632273] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:01:15,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:01:15,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2023-01-28 05:01:15,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54367720] [2023-01-28 05:01:15,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:01:15,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 05:01:15,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:01:15,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 05:01:15,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-01-28 05:01:15,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 281 [2023-01-28 05:01:15,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 1299 transitions, 28440 flow. Second operand has 16 states, 16 states have (on average 103.8125) internal successors, (1661), 16 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states 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 05:01:15,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:01:15,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 281 [2023-01-28 05:01:15,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:01:23,460 INFO L130 PetriNetUnfolder]: 11833/19658 cut-off events. [2023-01-28 05:01:23,460 INFO L131 PetriNetUnfolder]: For 511437/511437 co-relation queries the response was YES. [2023-01-28 05:01:23,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183910 conditions, 19658 events. 11833/19658 cut-off events. For 511437/511437 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 151558 event pairs, 996 based on Foata normal form. 688/20346 useless extension candidates. Maximal degree in co-relation 183785. Up to 4700 conditions per place. [2023-01-28 05:01:23,707 INFO L137 encePairwiseOnDemand]: 271/281 looper letters, 1057 selfloop transitions, 1038 changer transitions 62/2157 dead transitions. [2023-01-28 05:01:23,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 2157 transitions, 46974 flow [2023-01-28 05:01:23,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-01-28 05:01:23,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-01-28 05:01:23,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 5187 transitions. [2023-01-28 05:01:23,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3845640569395018 [2023-01-28 05:01:23,711 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 5187 transitions. [2023-01-28 05:01:23,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 5187 transitions. [2023-01-28 05:01:23,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:01:23,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 5187 transitions. [2023-01-28 05:01:23,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 108.0625) internal successors, (5187), 48 states have internal predecessors, (5187), 0 states have call successors, (0), 0 states 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 05:01:23,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 281.0) internal successors, (13769), 49 states have internal predecessors, (13769), 0 states have call successors, (0), 0 states 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 05:01:23,724 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 281.0) internal successors, (13769), 49 states have internal predecessors, (13769), 0 states have call successors, (0), 0 states 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 05:01:23,724 INFO L175 Difference]: Start difference. First operand has 370 places, 1299 transitions, 28440 flow. Second operand 48 states and 5187 transitions. [2023-01-28 05:01:23,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 2157 transitions, 46974 flow [2023-01-28 05:01:29,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 2157 transitions, 46540 flow, removed 91 selfloop flow, removed 6 redundant places. [2023-01-28 05:01:29,734 INFO L231 Difference]: Finished difference. Result has 426 places, 1599 transitions, 36362 flow [2023-01-28 05:01:29,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=25786, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=639, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=36362, PETRI_PLACES=426, PETRI_TRANSITIONS=1599} [2023-01-28 05:01:29,736 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 396 predicate places. [2023-01-28 05:01:29,736 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 1599 transitions, 36362 flow [2023-01-28 05:01:29,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 103.8125) internal successors, (1661), 16 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states 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 05:01:29,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:01:29,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:01:29,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-01-28 05:01:29,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-01-28 05:01:29,941 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:01:29,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:01:29,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1171180543, now seen corresponding path program 5 times [2023-01-28 05:01:29,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:01:29,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031335775] [2023-01-28 05:01:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:01:29,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:01:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:01:30,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:01:30,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:01:30,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031335775] [2023-01-28 05:01:30,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031335775] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:01:30,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677219270] [2023-01-28 05:01:30,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:01:30,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:01:30,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:01:30,033 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:01:30,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-28 05:01:30,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 05:01:30,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:01:30,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 05:01:30,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:01:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:01:30,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:01:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:01:30,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677219270] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:01:30,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:01:30,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-28 05:01:30,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666421371] [2023-01-28 05:01:30,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:01:30,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 05:01:30,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:01:30,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 05:01:30,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-01-28 05:01:30,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 281 [2023-01-28 05:01:30,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 1599 transitions, 36362 flow. Second operand has 18 states, 18 states have (on average 107.05555555555556) internal successors, (1927), 18 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states 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 05:01:30,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:01:30,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 281 [2023-01-28 05:01:30,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:01:38,106 INFO L130 PetriNetUnfolder]: 11278/18812 cut-off events. [2023-01-28 05:01:38,106 INFO L131 PetriNetUnfolder]: For 525779/525820 co-relation queries the response was YES. [2023-01-28 05:01:38,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183480 conditions, 18812 events. 11278/18812 cut-off events. For 525779/525820 co-relation queries the response was YES. Maximal size of possible extension queue 1276. Compared 145282 event pairs, 862 based on Foata normal form. 368/19156 useless extension candidates. Maximal degree in co-relation 183340. Up to 4573 conditions per place. [2023-01-28 05:01:38,491 INFO L137 encePairwiseOnDemand]: 272/281 looper letters, 1465 selfloop transitions, 351 changer transitions 35/1925 dead transitions. [2023-01-28 05:01:38,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 1925 transitions, 43887 flow [2023-01-28 05:01:38,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 05:01:38,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 05:01:38,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1935 transitions. [2023-01-28 05:01:38,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40506594096713416 [2023-01-28 05:01:38,493 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1935 transitions. [2023-01-28 05:01:38,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1935 transitions. [2023-01-28 05:01:38,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:01:38,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1935 transitions. [2023-01-28 05:01:38,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 113.82352941176471) internal successors, (1935), 17 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states 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 05:01:38,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 281.0) internal successors, (5058), 18 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states 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 05:01:38,496 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 281.0) internal successors, (5058), 18 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states 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 05:01:38,497 INFO L175 Difference]: Start difference. First operand has 426 places, 1599 transitions, 36362 flow. Second operand 17 states and 1935 transitions. [2023-01-28 05:01:38,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 1925 transitions, 43887 flow [2023-01-28 05:01:44,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 1925 transitions, 42842 flow, removed 441 selfloop flow, removed 12 redundant places. [2023-01-28 05:01:44,843 INFO L231 Difference]: Finished difference. Result has 430 places, 1531 transitions, 34174 flow [2023-01-28 05:01:44,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=33232, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=34174, PETRI_PLACES=430, PETRI_TRANSITIONS=1531} [2023-01-28 05:01:44,845 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 400 predicate places. [2023-01-28 05:01:44,845 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 1531 transitions, 34174 flow [2023-01-28 05:01:44,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 107.05555555555556) internal successors, (1927), 18 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states 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 05:01:44,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:01:44,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:01:44,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-01-28 05:01:45,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-28 05:01:45,051 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:01:45,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:01:45,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1459313101, now seen corresponding path program 6 times [2023-01-28 05:01:45,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:01:45,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110865275] [2023-01-28 05:01:45,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:01:45,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:01:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:01:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:01:45,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:01:45,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110865275] [2023-01-28 05:01:45,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110865275] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:01:45,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254217620] [2023-01-28 05:01:45,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:01:45,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:01:45,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:01:45,133 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:01:45,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-01-28 05:01:45,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 05:01:45,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:01:45,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 05:01:45,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:01:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:01:45,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:01:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:01:45,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254217620] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:01:45,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:01:45,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-28 05:01:45,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251303904] [2023-01-28 05:01:45,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:01:45,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 05:01:45,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:01:45,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 05:01:45,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-01-28 05:01:45,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 281 [2023-01-28 05:01:45,427 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 1531 transitions, 34174 flow. Second operand has 17 states, 17 states have (on average 107.11764705882354) internal successors, (1821), 17 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states 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 05:01:45,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:01:45,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 281 [2023-01-28 05:01:45,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:01:51,945 INFO L130 PetriNetUnfolder]: 10537/17355 cut-off events. [2023-01-28 05:01:51,945 INFO L131 PetriNetUnfolder]: For 496096/496141 co-relation queries the response was YES. [2023-01-28 05:01:52,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173472 conditions, 17355 events. 10537/17355 cut-off events. For 496096/496141 co-relation queries the response was YES. Maximal size of possible extension queue 1156. Compared 129999 event pairs, 747 based on Foata normal form. 266/17586 useless extension candidates. Maximal degree in co-relation 173337. Up to 4149 conditions per place. [2023-01-28 05:01:52,309 INFO L137 encePairwiseOnDemand]: 271/281 looper letters, 1610 selfloop transitions, 166 changer transitions 47/1891 dead transitions. [2023-01-28 05:01:52,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 1891 transitions, 43339 flow [2023-01-28 05:01:52,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 05:01:52,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 05:01:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1604 transitions. [2023-01-28 05:01:52,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40772750381291306 [2023-01-28 05:01:52,311 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1604 transitions. [2023-01-28 05:01:52,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1604 transitions. [2023-01-28 05:01:52,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:01:52,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1604 transitions. [2023-01-28 05:01:52,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 114.57142857142857) internal successors, (1604), 14 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states 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 05:01:52,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 281.0) internal successors, (4215), 15 states have internal predecessors, (4215), 0 states have call successors, (0), 0 states 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 05:01:52,314 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 281.0) internal successors, (4215), 15 states have internal predecessors, (4215), 0 states have call successors, (0), 0 states 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 05:01:52,314 INFO L175 Difference]: Start difference. First operand has 430 places, 1531 transitions, 34174 flow. Second operand 14 states and 1604 transitions. [2023-01-28 05:01:52,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 1891 transitions, 43339 flow [2023-01-28 05:01:58,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 1891 transitions, 42151 flow, removed 148 selfloop flow, removed 20 redundant places. [2023-01-28 05:01:58,042 INFO L231 Difference]: Finished difference. Result has 410 places, 1402 transitions, 30597 flow [2023-01-28 05:01:58,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=31305, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=30597, PETRI_PLACES=410, PETRI_TRANSITIONS=1402} [2023-01-28 05:01:58,044 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 380 predicate places. [2023-01-28 05:01:58,044 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 1402 transitions, 30597 flow [2023-01-28 05:01:58,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 107.11764705882354) internal successors, (1821), 17 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states 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 05:01:58,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:01:58,044 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:01:58,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-01-28 05:01:58,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-28 05:01:58,248 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:01:58,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:01:58,249 INFO L85 PathProgramCache]: Analyzing trace with hash -850196072, now seen corresponding path program 7 times [2023-01-28 05:01:58,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:01:58,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111000256] [2023-01-28 05:01:58,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:01:58,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:01:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:01:58,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:01:58,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:01:58,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111000256] [2023-01-28 05:01:58,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111000256] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:01:58,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378322323] [2023-01-28 05:01:58,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:01:58,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:01:58,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:01:58,346 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:01:58,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-01-28 05:01:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:01:58,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 05:01:58,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:01:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:01:58,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:01:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:01:58,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378322323] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:01:58,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:01:58,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-28 05:01:58,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471148639] [2023-01-28 05:01:58,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:01:58,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 05:01:58,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:01:58,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 05:01:58,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-01-28 05:01:58,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 281 [2023-01-28 05:01:58,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 1402 transitions, 30597 flow. Second operand has 14 states, 14 states have (on average 111.78571428571429) internal successors, (1565), 14 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states 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 05:01:58,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:01:58,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 281 [2023-01-28 05:01:58,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:02:02,630 INFO L130 PetriNetUnfolder]: 7183/11711 cut-off events. [2023-01-28 05:02:02,630 INFO L131 PetriNetUnfolder]: For 398444/398709 co-relation queries the response was YES. [2023-01-28 05:02:02,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128680 conditions, 11711 events. 7183/11711 cut-off events. For 398444/398709 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 82567 event pairs, 908 based on Foata normal form. 798/12426 useless extension candidates. Maximal degree in co-relation 128553. Up to 4491 conditions per place. [2023-01-28 05:02:02,761 INFO L137 encePairwiseOnDemand]: 275/281 looper letters, 1017 selfloop transitions, 32 changer transitions 308/1418 dead transitions. [2023-01-28 05:02:02,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1418 transitions, 34072 flow [2023-01-28 05:02:02,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 05:02:02,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 05:02:02,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 938 transitions. [2023-01-28 05:02:02,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41725978647686834 [2023-01-28 05:02:02,763 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 938 transitions. [2023-01-28 05:02:02,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 938 transitions. [2023-01-28 05:02:02,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:02:02,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 938 transitions. [2023-01-28 05:02:02,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 117.25) internal successors, (938), 8 states have internal predecessors, (938), 0 states have call successors, (0), 0 states 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 05:02:02,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states 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 05:02:02,766 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 281.0) internal successors, (2529), 9 states have internal predecessors, (2529), 0 states have call successors, (0), 0 states 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 05:02:02,766 INFO L175 Difference]: Start difference. First operand has 410 places, 1402 transitions, 30597 flow. Second operand 8 states and 938 transitions. [2023-01-28 05:02:02,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1418 transitions, 34072 flow [2023-01-28 05:02:05,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 1418 transitions, 33265 flow, removed 118 selfloop flow, removed 22 redundant places. [2023-01-28 05:02:05,876 INFO L231 Difference]: Finished difference. Result has 370 places, 965 transitions, 20728 flow [2023-01-28 05:02:05,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=27624, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=20728, PETRI_PLACES=370, PETRI_TRANSITIONS=965} [2023-01-28 05:02:05,879 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 340 predicate places. [2023-01-28 05:02:05,879 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 965 transitions, 20728 flow [2023-01-28 05:02:05,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 111.78571428571429) internal successors, (1565), 14 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states 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 05:02:05,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:02:05,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:02:05,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-01-28 05:02:06,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-28 05:02:06,085 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:02:06,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:02:06,086 INFO L85 PathProgramCache]: Analyzing trace with hash -576241059, now seen corresponding path program 17 times [2023-01-28 05:02:06,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:02:06,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88718849] [2023-01-28 05:02:06,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:02:06,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:02:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:02:06,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:02:06,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:02:06,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88718849] [2023-01-28 05:02:06,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88718849] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:02:06,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025066118] [2023-01-28 05:02:06,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:02:06,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:02:06,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:02:06,191 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:02:06,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-01-28 05:02:06,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:02:06,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:02:06,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 05:02:06,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:02:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:02:06,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:02:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:02:06,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025066118] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:02:06,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:02:06,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2023-01-28 05:02:06,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658698650] [2023-01-28 05:02:06,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:02:06,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 05:02:06,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:02:06,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 05:02:06,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-01-28 05:02:06,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 281 [2023-01-28 05:02:06,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 965 transitions, 20728 flow. Second operand has 17 states, 17 states have (on average 103.76470588235294) internal successors, (1764), 17 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states 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 05:02:06,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:02:06,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 281 [2023-01-28 05:02:06,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:02:10,544 INFO L130 PetriNetUnfolder]: 7500/11437 cut-off events. [2023-01-28 05:02:10,545 INFO L131 PetriNetUnfolder]: For 385833/385833 co-relation queries the response was YES. [2023-01-28 05:02:10,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125764 conditions, 11437 events. 7500/11437 cut-off events. For 385833/385833 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 70139 event pairs, 413 based on Foata normal form. 121/11558 useless extension candidates. Maximal degree in co-relation 125647. Up to 3784 conditions per place. [2023-01-28 05:02:10,673 INFO L137 encePairwiseOnDemand]: 271/281 looper letters, 865 selfloop transitions, 763 changer transitions 0/1628 dead transitions. [2023-01-28 05:02:10,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 1628 transitions, 36855 flow [2023-01-28 05:02:10,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 05:02:10,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 05:02:10,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3373 transitions. [2023-01-28 05:02:10,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3872115715761681 [2023-01-28 05:02:10,677 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3373 transitions. [2023-01-28 05:02:10,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3373 transitions. [2023-01-28 05:02:10,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:02:10,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3373 transitions. [2023-01-28 05:02:10,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 108.80645161290323) internal successors, (3373), 31 states have internal predecessors, (3373), 0 states have call successors, (0), 0 states 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 05:02:10,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 281.0) internal successors, (8992), 32 states have internal predecessors, (8992), 0 states have call successors, (0), 0 states 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 05:02:10,686 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 281.0) internal successors, (8992), 32 states have internal predecessors, (8992), 0 states have call successors, (0), 0 states 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 05:02:10,686 INFO L175 Difference]: Start difference. First operand has 370 places, 965 transitions, 20728 flow. Second operand 31 states and 3373 transitions. [2023-01-28 05:02:10,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 1628 transitions, 36855 flow [2023-01-28 05:02:13,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 1628 transitions, 36222 flow, removed 245 selfloop flow, removed 16 redundant places. [2023-01-28 05:02:13,827 INFO L231 Difference]: Finished difference. Result has 318 places, 1262 transitions, 29058 flow [2023-01-28 05:02:13,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=20388, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=965, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=29058, PETRI_PLACES=318, PETRI_TRANSITIONS=1262} [2023-01-28 05:02:13,829 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 288 predicate places. [2023-01-28 05:02:13,829 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 1262 transitions, 29058 flow [2023-01-28 05:02:13,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 103.76470588235294) internal successors, (1764), 17 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states 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 05:02:13,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:02:13,829 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:02:13,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-01-28 05:02:14,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:02:14,030 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:02:14,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:02:14,030 INFO L85 PathProgramCache]: Analyzing trace with hash -307992218, now seen corresponding path program 8 times [2023-01-28 05:02:14,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:02:14,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181112508] [2023-01-28 05:02:14,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:02:14,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:02:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:02:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:02:14,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:02:14,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181112508] [2023-01-28 05:02:14,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181112508] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:02:14,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378665261] [2023-01-28 05:02:14,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:02:14,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:02:14,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:02:14,129 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:02:14,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-01-28 05:02:14,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:02:14,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:02:14,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 05:02:14,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:02:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:02:14,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:02:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:02:14,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378665261] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:02:14,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:02:14,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-01-28 05:02:14,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111696530] [2023-01-28 05:02:14,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:02:14,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 05:02:14,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:02:14,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 05:02:14,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-01-28 05:02:14,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 281 [2023-01-28 05:02:14,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 1262 transitions, 29058 flow. Second operand has 20 states, 20 states have (on average 107.2) internal successors, (2144), 20 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states 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 05:02:14,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:02:14,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 281 [2023-01-28 05:02:14,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:02:20,022 INFO L130 PetriNetUnfolder]: 10654/16223 cut-off events. [2023-01-28 05:02:20,022 INFO L131 PetriNetUnfolder]: For 592459/592489 co-relation queries the response was YES. [2023-01-28 05:02:20,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189364 conditions, 16223 events. 10654/16223 cut-off events. For 592459/592489 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 104146 event pairs, 899 based on Foata normal form. 102/16319 useless extension candidates. Maximal degree in co-relation 189243. Up to 5784 conditions per place. [2023-01-28 05:02:20,389 INFO L137 encePairwiseOnDemand]: 273/281 looper letters, 1532 selfloop transitions, 492 changer transitions 0/2080 dead transitions. [2023-01-28 05:02:20,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 2080 transitions, 51074 flow [2023-01-28 05:02:20,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 05:02:20,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 05:02:20,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2054 transitions. [2023-01-28 05:02:20,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40608936338473706 [2023-01-28 05:02:20,392 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2054 transitions. [2023-01-28 05:02:20,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2054 transitions. [2023-01-28 05:02:20,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:02:20,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2054 transitions. [2023-01-28 05:02:20,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 114.11111111111111) internal successors, (2054), 18 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states 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 05:02:20,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 281.0) internal successors, (5339), 19 states have internal predecessors, (5339), 0 states have call successors, (0), 0 states 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 05:02:20,397 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 281.0) internal successors, (5339), 19 states have internal predecessors, (5339), 0 states have call successors, (0), 0 states 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 05:02:20,397 INFO L175 Difference]: Start difference. First operand has 318 places, 1262 transitions, 29058 flow. Second operand 18 states and 2054 transitions. [2023-01-28 05:02:20,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 2080 transitions, 51074 flow [2023-01-28 05:02:26,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 2080 transitions, 49185 flow, removed 740 selfloop flow, removed 9 redundant places. [2023-01-28 05:02:26,308 INFO L231 Difference]: Finished difference. Result has 332 places, 1377 transitions, 32096 flow [2023-01-28 05:02:26,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=27690, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=791, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=32096, PETRI_PLACES=332, PETRI_TRANSITIONS=1377} [2023-01-28 05:02:26,309 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 302 predicate places. [2023-01-28 05:02:26,309 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 1377 transitions, 32096 flow [2023-01-28 05:02:26,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 107.2) internal successors, (2144), 20 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states 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 05:02:26,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:02:26,310 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:02:26,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-01-28 05:02:26,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-01-28 05:02:26,511 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:02:26,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:02:26,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1396543017, now seen corresponding path program 18 times [2023-01-28 05:02:26,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:02:26,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403625840] [2023-01-28 05:02:26,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:02:26,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:02:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:02:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:02:26,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:02:26,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403625840] [2023-01-28 05:02:26,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403625840] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:02:26,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144479960] [2023-01-28 05:02:26,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:02:26,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:02:26,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:02:26,603 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:02:26,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-01-28 05:02:26,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 05:02:26,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:02:26,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 05:02:26,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:02:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:02:26,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:02:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:02:26,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144479960] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:02:26,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:02:26,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-01-28 05:02:26,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631872673] [2023-01-28 05:02:26,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:02:26,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 05:02:26,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:02:26,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 05:02:26,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-01-28 05:02:26,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 281 [2023-01-28 05:02:26,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 1377 transitions, 32096 flow. Second operand has 18 states, 18 states have (on average 107.27777777777777) internal successors, (1931), 18 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states 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 05:02:26,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:02:26,892 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 281 [2023-01-28 05:02:26,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:02:32,307 INFO L130 PetriNetUnfolder]: 10550/16016 cut-off events. [2023-01-28 05:02:32,308 INFO L131 PetriNetUnfolder]: For 605188/605204 co-relation queries the response was YES. [2023-01-28 05:02:32,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188982 conditions, 16016 events. 10550/16016 cut-off events. For 605188/605204 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 101797 event pairs, 1313 based on Foata normal form. 78/16071 useless extension candidates. Maximal degree in co-relation 188858. Up to 6371 conditions per place. [2023-01-28 05:02:32,513 INFO L137 encePairwiseOnDemand]: 273/281 looper letters, 935 selfloop transitions, 557 changer transitions 0/1546 dead transitions. [2023-01-28 05:02:32,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1546 transitions, 38167 flow [2023-01-28 05:02:32,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 05:02:32,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 05:02:32,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1249 transitions. [2023-01-28 05:02:32,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4040763506955678 [2023-01-28 05:02:32,514 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1249 transitions. [2023-01-28 05:02:32,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1249 transitions. [2023-01-28 05:02:32,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:02:32,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1249 transitions. [2023-01-28 05:02:32,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 113.54545454545455) internal successors, (1249), 11 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states 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 05:02:32,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 281.0) internal successors, (3372), 12 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states 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 05:02:32,517 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 281.0) internal successors, (3372), 12 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states 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 05:02:32,517 INFO L175 Difference]: Start difference. First operand has 332 places, 1377 transitions, 32096 flow. Second operand 11 states and 1249 transitions. [2023-01-28 05:02:32,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1546 transitions, 38167 flow [2023-01-28 05:02:38,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 1546 transitions, 37131 flow, removed 465 selfloop flow, removed 5 redundant places. [2023-01-28 05:02:38,569 INFO L231 Difference]: Finished difference. Result has 340 places, 1385 transitions, 33046 flow [2023-01-28 05:02:38,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=30828, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=532, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=803, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=33046, PETRI_PLACES=340, PETRI_TRANSITIONS=1385} [2023-01-28 05:02:38,570 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 310 predicate places. [2023-01-28 05:02:38,570 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 1385 transitions, 33046 flow [2023-01-28 05:02:38,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 107.27777777777777) internal successors, (1931), 18 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states 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 05:02:38,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:02:38,570 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:02:38,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-01-28 05:02:38,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-01-28 05:02:38,771 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:02:38,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:02:38,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1010732936, now seen corresponding path program 9 times [2023-01-28 05:02:38,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:02:38,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508921607] [2023-01-28 05:02:38,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:02:38,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:02:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:02:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:02:38,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:02:38,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508921607] [2023-01-28 05:02:38,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508921607] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:02:38,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214178616] [2023-01-28 05:02:38,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:02:38,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:02:38,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:02:38,872 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:02:38,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-01-28 05:02:39,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 05:02:39,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:02:39,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 05:02:39,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:02:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:02:39,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:02:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:02:39,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214178616] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:02:39,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:02:39,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-01-28 05:02:39,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236831633] [2023-01-28 05:02:39,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:02:39,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 05:02:39,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:02:39,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 05:02:39,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-01-28 05:02:39,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 281 [2023-01-28 05:02:39,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 1385 transitions, 33046 flow. Second operand has 18 states, 18 states have (on average 107.0) internal successors, (1926), 18 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states 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 05:02:39,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:02:39,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 281 [2023-01-28 05:02:39,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:02:44,479 INFO L130 PetriNetUnfolder]: 10489/15931 cut-off events. [2023-01-28 05:02:44,479 INFO L131 PetriNetUnfolder]: For 591951/591966 co-relation queries the response was YES. [2023-01-28 05:02:44,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187282 conditions, 15931 events. 10489/15931 cut-off events. For 591951/591966 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 101333 event pairs, 2232 based on Foata normal form. 46/15967 useless extension candidates. Maximal degree in co-relation 187155. Up to 11912 conditions per place. [2023-01-28 05:02:44,840 INFO L137 encePairwiseOnDemand]: 273/281 looper letters, 1089 selfloop transitions, 306 changer transitions 0/1448 dead transitions. [2023-01-28 05:02:44,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 1448 transitions, 36840 flow [2023-01-28 05:02:44,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 05:02:44,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 05:02:44,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1013 transitions. [2023-01-28 05:02:44,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40055357848952156 [2023-01-28 05:02:44,842 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1013 transitions. [2023-01-28 05:02:44,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1013 transitions. [2023-01-28 05:02:44,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:02:44,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1013 transitions. [2023-01-28 05:02:44,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 112.55555555555556) internal successors, (1013), 9 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states 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 05:02:44,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 281.0) internal successors, (2810), 10 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states 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 05:02:44,845 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 281.0) internal successors, (2810), 10 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states 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 05:02:44,845 INFO L175 Difference]: Start difference. First operand has 340 places, 1385 transitions, 33046 flow. Second operand 9 states and 1013 transitions. [2023-01-28 05:02:44,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 1448 transitions, 36840 flow [2023-01-28 05:02:50,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1448 transitions, 35728 flow, removed 261 selfloop flow, removed 9 redundant places. [2023-01-28 05:02:50,644 INFO L231 Difference]: Finished difference. Result has 330 places, 1373 transitions, 32363 flow [2023-01-28 05:02:50,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=31682, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1065, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=32363, PETRI_PLACES=330, PETRI_TRANSITIONS=1373} [2023-01-28 05:02:50,645 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 300 predicate places. [2023-01-28 05:02:50,645 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 1373 transitions, 32363 flow [2023-01-28 05:02:50,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 107.0) internal successors, (1926), 18 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states 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 05:02:50,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:02:50,645 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:02:50,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-01-28 05:02:50,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-01-28 05:02:50,849 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:02:50,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:02:50,849 INFO L85 PathProgramCache]: Analyzing trace with hash 989504847, now seen corresponding path program 19 times [2023-01-28 05:02:50,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:02:50,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724867752] [2023-01-28 05:02:50,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:02:50,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:02:50,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:02:50,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:02:50,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:02:50,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724867752] [2023-01-28 05:02:50,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724867752] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:02:50,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143973278] [2023-01-28 05:02:50,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:02:50,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:02:50,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:02:50,943 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:02:50,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-01-28 05:02:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:02:51,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 05:02:51,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:02:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:02:51,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:02:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:02:51,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143973278] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:02:51,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:02:51,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-28 05:02:51,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814919152] [2023-01-28 05:02:51,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:02:51,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 05:02:51,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:02:51,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 05:02:51,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-01-28 05:02:51,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 281 [2023-01-28 05:02:51,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 1373 transitions, 32363 flow. Second operand has 19 states, 19 states have (on average 107.15789473684211) internal successors, (2036), 19 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states 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 05:02:51,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:02:51,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 281 [2023-01-28 05:02:51,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:02:56,700 INFO L130 PetriNetUnfolder]: 10222/15446 cut-off events. [2023-01-28 05:02:56,700 INFO L131 PetriNetUnfolder]: For 572568/572582 co-relation queries the response was YES. [2023-01-28 05:02:56,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179840 conditions, 15446 events. 10222/15446 cut-off events. For 572568/572582 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 96475 event pairs, 1377 based on Foata normal form. 201/15629 useless extension candidates. Maximal degree in co-relation 179714. Up to 6371 conditions per place. [2023-01-28 05:02:56,892 INFO L137 encePairwiseOnDemand]: 273/281 looper letters, 955 selfloop transitions, 568 changer transitions 0/1573 dead transitions. [2023-01-28 05:02:56,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1573 transitions, 39075 flow [2023-01-28 05:02:56,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 05:02:56,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 05:02:56,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1479 transitions. [2023-01-28 05:02:56,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4048727073638106 [2023-01-28 05:02:56,894 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1479 transitions. [2023-01-28 05:02:56,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1479 transitions. [2023-01-28 05:02:56,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:02:56,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1479 transitions. [2023-01-28 05:02:56,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 113.76923076923077) internal successors, (1479), 13 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states 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 05:02:56,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 281.0) internal successors, (3934), 14 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states 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 05:02:56,898 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 281.0) internal successors, (3934), 14 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states 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 05:02:56,898 INFO L175 Difference]: Start difference. First operand has 330 places, 1373 transitions, 32363 flow. Second operand 13 states and 1479 transitions. [2023-01-28 05:02:56,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1573 transitions, 39075 flow [2023-01-28 05:03:02,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 1573 transitions, 38387 flow, removed 49 selfloop flow, removed 7 redundant places. [2023-01-28 05:03:02,142 INFO L231 Difference]: Finished difference. Result has 337 places, 1358 transitions, 32701 flow [2023-01-28 05:03:02,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=30617, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=534, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=783, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=32701, PETRI_PLACES=337, PETRI_TRANSITIONS=1358} [2023-01-28 05:03:02,143 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 307 predicate places. [2023-01-28 05:03:02,143 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 1358 transitions, 32701 flow [2023-01-28 05:03:02,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 107.15789473684211) internal successors, (2036), 19 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states 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 05:03:02,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:03:02,144 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:03:02,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-01-28 05:03:02,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:03:02,348 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:03:02,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:03:02,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1859746226, now seen corresponding path program 10 times [2023-01-28 05:03:02,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:03:02,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266021903] [2023-01-28 05:03:02,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:03:02,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:03:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:03:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:03:02,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:03:02,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266021903] [2023-01-28 05:03:02,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266021903] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:03:02,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530822173] [2023-01-28 05:03:02,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:03:02,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:03:02,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:03:02,457 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:03:02,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-01-28 05:03:02,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:03:02,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:03:02,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 05:03:02,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:03:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:03:02,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:03:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:03:02,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530822173] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:03:02,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:03:02,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2023-01-28 05:03:02,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828548769] [2023-01-28 05:03:02,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:03:02,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 05:03:02,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:03:02,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 05:03:02,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-01-28 05:03:02,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 281 [2023-01-28 05:03:02,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 1358 transitions, 32701 flow. Second operand has 17 states, 17 states have (on average 103.41176470588235) internal successors, (1758), 17 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states 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 05:03:02,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:03:02,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 281 [2023-01-28 05:03:02,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:03:08,490 INFO L130 PetriNetUnfolder]: 10259/15429 cut-off events. [2023-01-28 05:03:08,491 INFO L131 PetriNetUnfolder]: For 565280/565280 co-relation queries the response was YES. [2023-01-28 05:03:08,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180861 conditions, 15429 events. 10259/15429 cut-off events. For 565280/565280 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 95127 event pairs, 1034 based on Foata normal form. 36/15465 useless extension candidates. Maximal degree in co-relation 180733. Up to 9632 conditions per place. [2023-01-28 05:03:08,684 INFO L137 encePairwiseOnDemand]: 271/281 looper letters, 1051 selfloop transitions, 485 changer transitions 0/1536 dead transitions. [2023-01-28 05:03:08,684 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1536 transitions, 39233 flow [2023-01-28 05:03:08,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 05:03:08,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 05:03:08,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2056 transitions. [2023-01-28 05:03:08,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850908409814572 [2023-01-28 05:03:08,686 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2056 transitions. [2023-01-28 05:03:08,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2056 transitions. [2023-01-28 05:03:08,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:03:08,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2056 transitions. [2023-01-28 05:03:08,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 108.21052631578948) internal successors, (2056), 19 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states 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 05:03:08,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 281.0) internal successors, (5620), 20 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states 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 05:03:08,691 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 281.0) internal successors, (5620), 20 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states 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 05:03:08,691 INFO L175 Difference]: Start difference. First operand has 337 places, 1358 transitions, 32701 flow. Second operand 19 states and 2056 transitions. [2023-01-28 05:03:08,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1536 transitions, 39233 flow [2023-01-28 05:03:13,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1536 transitions, 38305 flow, removed 62 selfloop flow, removed 8 redundant places. [2023-01-28 05:03:13,944 INFO L231 Difference]: Finished difference. Result has 350 places, 1357 transitions, 32769 flow [2023-01-28 05:03:13,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=31690, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=481, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=868, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=32769, PETRI_PLACES=350, PETRI_TRANSITIONS=1357} [2023-01-28 05:03:13,945 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 320 predicate places. [2023-01-28 05:03:13,945 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 1357 transitions, 32769 flow [2023-01-28 05:03:13,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 103.41176470588235) internal successors, (1758), 17 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states 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 05:03:13,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:03:13,945 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:03:13,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-01-28 05:03:14,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:03:14,149 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:03:14,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:03:14,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1250017593, now seen corresponding path program 20 times [2023-01-28 05:03:14,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:03:14,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706153555] [2023-01-28 05:03:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:03:14,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:03:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:03:14,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:03:14,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:03:14,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706153555] [2023-01-28 05:03:14,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706153555] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:03:14,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024435897] [2023-01-28 05:03:14,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:03:14,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:03:14,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:03:14,253 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:03:14,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-01-28 05:03:14,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:03:14,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:03:14,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 05:03:14,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:03:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:03:14,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:03:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:03:14,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024435897] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:03:14,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:03:14,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-01-28 05:03:14,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273118270] [2023-01-28 05:03:14,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:03:14,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 05:03:14,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:03:14,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 05:03:14,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-01-28 05:03:14,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 281 [2023-01-28 05:03:14,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 1357 transitions, 32769 flow. Second operand has 20 states, 20 states have (on average 107.1) internal successors, (2142), 20 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states 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 05:03:14,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:03:14,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 281 [2023-01-28 05:03:14,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:03:20,096 INFO L130 PetriNetUnfolder]: 10261/15451 cut-off events. [2023-01-28 05:03:20,096 INFO L131 PetriNetUnfolder]: For 573095/573141 co-relation queries the response was YES. [2023-01-28 05:03:20,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181458 conditions, 15451 events. 10261/15451 cut-off events. For 573095/573141 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 96157 event pairs, 1888 based on Foata normal form. 170/15595 useless extension candidates. Maximal degree in co-relation 181327. Up to 10515 conditions per place. [2023-01-28 05:03:20,296 INFO L137 encePairwiseOnDemand]: 273/281 looper letters, 1167 selfloop transitions, 454 changer transitions 0/1669 dead transitions. [2023-01-28 05:03:20,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 1669 transitions, 42180 flow [2023-01-28 05:03:20,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 05:03:20,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 05:03:20,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1582 transitions. [2023-01-28 05:03:20,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40213523131672596 [2023-01-28 05:03:20,298 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1582 transitions. [2023-01-28 05:03:20,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1582 transitions. [2023-01-28 05:03:20,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:03:20,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1582 transitions. [2023-01-28 05:03:20,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 113.0) internal successors, (1582), 14 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:03:20,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 281.0) internal successors, (4215), 15 states have internal predecessors, (4215), 0 states have call successors, (0), 0 states 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 05:03:20,303 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 281.0) internal successors, (4215), 15 states have internal predecessors, (4215), 0 states have call successors, (0), 0 states 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 05:03:20,303 INFO L175 Difference]: Start difference. First operand has 350 places, 1357 transitions, 32769 flow. Second operand 14 states and 1582 transitions. [2023-01-28 05:03:20,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 1669 transitions, 42180 flow [2023-01-28 05:03:25,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1669 transitions, 41543 flow, removed 20 selfloop flow, removed 11 redundant places. [2023-01-28 05:03:25,665 INFO L231 Difference]: Finished difference. Result has 356 places, 1379 transitions, 33866 flow [2023-01-28 05:03:25,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=31569, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=405, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=893, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=33866, PETRI_PLACES=356, PETRI_TRANSITIONS=1379} [2023-01-28 05:03:25,666 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 326 predicate places. [2023-01-28 05:03:25,666 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 1379 transitions, 33866 flow [2023-01-28 05:03:25,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 107.1) internal successors, (2142), 20 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states 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 05:03:25,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:03:25,667 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:03:25,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-01-28 05:03:25,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-01-28 05:03:25,869 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:03:25,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:03:25,869 INFO L85 PathProgramCache]: Analyzing trace with hash 801782288, now seen corresponding path program 11 times [2023-01-28 05:03:25,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:03:25,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298756665] [2023-01-28 05:03:25,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:03:25,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:03:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:03:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:03:25,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:03:25,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298756665] [2023-01-28 05:03:25,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298756665] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:03:25,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405941544] [2023-01-28 05:03:25,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:03:25,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:03:25,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:03:25,951 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:03:25,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-01-28 05:03:26,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:03:26,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:03:26,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 05:03:26,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:03:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:03:26,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:03:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:03:26,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405941544] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:03:26,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:03:26,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2023-01-28 05:03:26,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814804124] [2023-01-28 05:03:26,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:03:26,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 05:03:26,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:03:26,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 05:03:26,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-01-28 05:03:26,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 281 [2023-01-28 05:03:26,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 1379 transitions, 33866 flow. Second operand has 17 states, 17 states have (on average 103.52941176470588) internal successors, (1760), 17 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states 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 05:03:26,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:03:26,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 281 [2023-01-28 05:03:26,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:03:32,059 INFO L130 PetriNetUnfolder]: 10308/15504 cut-off events. [2023-01-28 05:03:32,059 INFO L131 PetriNetUnfolder]: For 565186/565186 co-relation queries the response was YES. [2023-01-28 05:03:32,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182887 conditions, 15504 events. 10308/15504 cut-off events. For 565186/565186 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 95933 event pairs, 500 based on Foata normal form. 46/15550 useless extension candidates. Maximal degree in co-relation 182752. Up to 5705 conditions per place. [2023-01-28 05:03:32,266 INFO L137 encePairwiseOnDemand]: 271/281 looper letters, 1255 selfloop transitions, 771 changer transitions 0/2026 dead transitions. [2023-01-28 05:03:32,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 2026 transitions, 51862 flow [2023-01-28 05:03:32,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-28 05:03:32,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-28 05:03:32,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2697 transitions. [2023-01-28 05:03:32,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.383914590747331 [2023-01-28 05:03:32,268 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2697 transitions. [2023-01-28 05:03:32,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2697 transitions. [2023-01-28 05:03:32,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:03:32,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2697 transitions. [2023-01-28 05:03:32,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 107.88) internal successors, (2697), 25 states have internal predecessors, (2697), 0 states have call successors, (0), 0 states 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 05:03:32,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 281.0) internal successors, (7306), 26 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states 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 05:03:32,274 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 281.0) internal successors, (7306), 26 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states 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 05:03:32,274 INFO L175 Difference]: Start difference. First operand has 356 places, 1379 transitions, 33866 flow. Second operand 25 states and 2697 transitions. [2023-01-28 05:03:32,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 2026 transitions, 51862 flow [2023-01-28 05:03:37,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 2026 transitions, 51173 flow, removed 56 selfloop flow, removed 8 redundant places. [2023-01-28 05:03:38,001 INFO L231 Difference]: Finished difference. Result has 375 places, 1562 transitions, 39186 flow [2023-01-28 05:03:38,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=33107, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=581, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=780, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=39186, PETRI_PLACES=375, PETRI_TRANSITIONS=1562} [2023-01-28 05:03:38,002 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 345 predicate places. [2023-01-28 05:03:38,002 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 1562 transitions, 39186 flow [2023-01-28 05:03:38,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 103.52941176470588) internal successors, (1760), 17 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states 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 05:03:38,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:03:38,003 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:03:38,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-01-28 05:03:38,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-01-28 05:03:38,203 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:03:38,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:03:38,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1391823177, now seen corresponding path program 21 times [2023-01-28 05:03:38,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:03:38,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715259650] [2023-01-28 05:03:38,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:03:38,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:03:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:03:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:03:38,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:03:38,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715259650] [2023-01-28 05:03:38,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715259650] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:03:38,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851951280] [2023-01-28 05:03:38,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:03:38,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:03:38,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:03:38,295 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:03:38,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-01-28 05:03:38,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 05:03:38,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:03:38,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 05:03:38,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:03:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:03:38,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:03:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:03:38,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851951280] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:03:38,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:03:38,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-01-28 05:03:38,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409915775] [2023-01-28 05:03:38,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:03:38,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 05:03:38,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:03:38,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 05:03:38,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-01-28 05:03:38,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 281 [2023-01-28 05:03:38,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 1562 transitions, 39186 flow. Second operand has 18 states, 18 states have (on average 107.11111111111111) internal successors, (1928), 18 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states 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 05:03:38,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:03:38,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 281 [2023-01-28 05:03:38,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:03:44,068 INFO L130 PetriNetUnfolder]: 10136/15267 cut-off events. [2023-01-28 05:03:44,068 INFO L131 PetriNetUnfolder]: For 586100/586119 co-relation queries the response was YES. [2023-01-28 05:03:44,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183641 conditions, 15267 events. 10136/15267 cut-off events. For 586100/586119 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 94601 event pairs, 1948 based on Foata normal form. 59/15317 useless extension candidates. Maximal degree in co-relation 183503. Up to 10894 conditions per place. [2023-01-28 05:03:44,254 INFO L137 encePairwiseOnDemand]: 273/281 looper letters, 1329 selfloop transitions, 360 changer transitions 0/1759 dead transitions. [2023-01-28 05:03:44,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 1759 transitions, 46494 flow [2023-01-28 05:03:44,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 05:03:44,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 05:03:44,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1007 transitions. [2023-01-28 05:03:44,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3981810992487149 [2023-01-28 05:03:44,255 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1007 transitions. [2023-01-28 05:03:44,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1007 transitions. [2023-01-28 05:03:44,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:03:44,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1007 transitions. [2023-01-28 05:03:44,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 111.88888888888889) internal successors, (1007), 9 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states 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 05:03:44,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 281.0) internal successors, (2810), 10 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states 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 05:03:44,257 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 281.0) internal successors, (2810), 10 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states 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 05:03:44,257 INFO L175 Difference]: Start difference. First operand has 375 places, 1562 transitions, 39186 flow. Second operand 9 states and 1007 transitions. [2023-01-28 05:03:44,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 1759 transitions, 46494 flow [2023-01-28 05:03:49,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 1759 transitions, 45435 flow, removed 131 selfloop flow, removed 9 redundant places. [2023-01-28 05:03:49,924 INFO L231 Difference]: Finished difference. Result has 375 places, 1565 transitions, 38948 flow [2023-01-28 05:03:49,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=37792, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=343, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=38948, PETRI_PLACES=375, PETRI_TRANSITIONS=1565} [2023-01-28 05:03:49,926 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 345 predicate places. [2023-01-28 05:03:49,926 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 1565 transitions, 38948 flow [2023-01-28 05:03:49,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 107.11111111111111) internal successors, (1928), 18 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states 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 05:03:49,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:03:49,927 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:03:49,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-01-28 05:03:50,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-01-28 05:03:50,133 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:03:50,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:03:50,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1075023854, now seen corresponding path program 12 times [2023-01-28 05:03:50,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:03:50,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877940217] [2023-01-28 05:03:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:03:50,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:03:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:03:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:03:50,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:03:50,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877940217] [2023-01-28 05:03:50,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877940217] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:03:50,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642441550] [2023-01-28 05:03:50,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:03:50,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:03:50,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:03:50,230 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:03:50,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-01-28 05:03:50,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 05:03:50,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:03:50,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 05:03:50,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:03:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:03:50,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:03:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:03:50,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642441550] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:03:50,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:03:50,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-01-28 05:03:50,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36781250] [2023-01-28 05:03:50,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:03:50,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 05:03:50,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:03:50,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 05:03:50,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-01-28 05:03:50,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 281 [2023-01-28 05:03:50,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 1565 transitions, 38948 flow. Second operand has 21 states, 21 states have (on average 107.04761904761905) internal successors, (2248), 21 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 05:03:50,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:03:50,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 281 [2023-01-28 05:03:50,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:03:56,434 INFO L130 PetriNetUnfolder]: 10107/15193 cut-off events. [2023-01-28 05:03:56,434 INFO L131 PetriNetUnfolder]: For 558944/558965 co-relation queries the response was YES. [2023-01-28 05:03:56,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180988 conditions, 15193 events. 10107/15193 cut-off events. For 558944/558965 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 93965 event pairs, 878 based on Foata normal form. 58/15240 useless extension candidates. Maximal degree in co-relation 180850. Up to 5682 conditions per place. [2023-01-28 05:03:56,632 INFO L137 encePairwiseOnDemand]: 273/281 looper letters, 1568 selfloop transitions, 560 changer transitions 0/2198 dead transitions. [2023-01-28 05:03:56,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 2198 transitions, 56786 flow [2023-01-28 05:03:56,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 05:03:56,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 05:03:56,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1934 transitions. [2023-01-28 05:03:56,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4048566045635336 [2023-01-28 05:03:56,634 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1934 transitions. [2023-01-28 05:03:56,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1934 transitions. [2023-01-28 05:03:56,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:03:56,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1934 transitions. [2023-01-28 05:03:56,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 113.76470588235294) internal successors, (1934), 17 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states 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 05:03:56,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 281.0) internal successors, (5058), 18 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states 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 05:03:56,637 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 281.0) internal successors, (5058), 18 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states 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 05:03:56,637 INFO L175 Difference]: Start difference. First operand has 375 places, 1565 transitions, 38948 flow. Second operand 17 states and 1934 transitions. [2023-01-28 05:03:56,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 2198 transitions, 56786 flow [2023-01-28 05:04:02,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 2198 transitions, 56156 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-28 05:04:02,683 INFO L231 Difference]: Finished difference. Result has 384 places, 1565 transitions, 39471 flow [2023-01-28 05:04:02,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=38175, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=553, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1005, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=39471, PETRI_PLACES=384, PETRI_TRANSITIONS=1565} [2023-01-28 05:04:02,685 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 354 predicate places. [2023-01-28 05:04:02,685 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 1565 transitions, 39471 flow [2023-01-28 05:04:02,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 107.04761904761905) internal successors, (2248), 21 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 05:04:02,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:04:02,685 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:04:02,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-01-28 05:04:02,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:04:02,891 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:04:02,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:04:02,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1513250842, now seen corresponding path program 13 times [2023-01-28 05:04:02,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:04:02,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292195600] [2023-01-28 05:04:02,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:04:02,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:04:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:04:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:04:02,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:04:02,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292195600] [2023-01-28 05:04:02,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292195600] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:04:02,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353833636] [2023-01-28 05:04:02,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:04:02,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:04:02,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:04:02,972 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:04:02,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-01-28 05:04:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:04:03,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 05:04:03,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:04:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:04:03,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:04:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:04:03,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353833636] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:04:03,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:04:03,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-28 05:04:03,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613408255] [2023-01-28 05:04:03,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:04:03,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 05:04:03,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:04:03,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 05:04:03,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-01-28 05:04:03,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 281 [2023-01-28 05:04:03,306 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 1565 transitions, 39471 flow. Second operand has 19 states, 19 states have (on average 107.05263157894737) internal successors, (2034), 19 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states 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 05:04:03,306 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:04:03,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 281 [2023-01-28 05:04:03,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:04:08,788 INFO L130 PetriNetUnfolder]: 10043/15067 cut-off events. [2023-01-28 05:04:08,788 INFO L131 PetriNetUnfolder]: For 569085/569106 co-relation queries the response was YES. [2023-01-28 05:04:09,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181769 conditions, 15067 events. 10043/15067 cut-off events. For 569085/569106 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 92529 event pairs, 1879 based on Foata normal form. 48/15104 useless extension candidates. Maximal degree in co-relation 181631. Up to 10563 conditions per place. [2023-01-28 05:04:09,173 INFO L137 encePairwiseOnDemand]: 273/281 looper letters, 1273 selfloop transitions, 358 changer transitions 0/1700 dead transitions. [2023-01-28 05:04:09,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1700 transitions, 45318 flow [2023-01-28 05:04:09,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 05:04:09,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 05:04:09,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1010 transitions. [2023-01-28 05:04:09,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39936733886911824 [2023-01-28 05:04:09,175 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1010 transitions. [2023-01-28 05:04:09,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1010 transitions. [2023-01-28 05:04:09,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:04:09,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1010 transitions. [2023-01-28 05:04:09,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 112.22222222222223) internal successors, (1010), 9 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states 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 05:04:09,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 281.0) internal successors, (2810), 10 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states 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 05:04:09,177 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 281.0) internal successors, (2810), 10 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states 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 05:04:09,177 INFO L175 Difference]: Start difference. First operand has 384 places, 1565 transitions, 39471 flow. Second operand 9 states and 1010 transitions. [2023-01-28 05:04:09,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1700 transitions, 45318 flow [2023-01-28 05:04:15,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1700 transitions, 44537 flow, removed 22 selfloop flow, removed 15 redundant places. [2023-01-28 05:04:15,067 INFO L231 Difference]: Finished difference. Result has 378 places, 1562 transitions, 39338 flow [2023-01-28 05:04:15,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=38522, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=39338, PETRI_PLACES=378, PETRI_TRANSITIONS=1562} [2023-01-28 05:04:15,069 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 348 predicate places. [2023-01-28 05:04:15,069 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 1562 transitions, 39338 flow [2023-01-28 05:04:15,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 107.05263157894737) internal successors, (2034), 19 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states 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 05:04:15,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:04:15,069 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:04:15,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-01-28 05:04:15,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:04:15,275 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:04:15,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:04:15,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1789878289, now seen corresponding path program 7 times [2023-01-28 05:04:15,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:04:15,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58244357] [2023-01-28 05:04:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:04:15,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:04:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:04:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:04:16,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:04:16,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58244357] [2023-01-28 05:04:16,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58244357] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:04:16,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769410192] [2023-01-28 05:04:16,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:04:16,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:04:16,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:04:16,035 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:04:16,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-01-28 05:04:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:04:16,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 05:04:16,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:04:16,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:04:16,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-01-28 05:04:16,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:04:16,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-01-28 05:04:16,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:04:16,761 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:04:16,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 20 [2023-01-28 05:04:16,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:04:16,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:04:17,159 WARN L839 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_2277 (Array Int Int))) (or (= (mod c_~sum1~0 4294967296) (mod (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2277) c_~A~0.base))) (+ (select .cse0 c_~A~0.offset) c_~sum3~0 c_~sum2~0 (select .cse0 (+ c_~A~0.offset (* ~M~0 4))))) 4294967296)) (<= ~M~0 0) (< 1 ~M~0))) is different from false [2023-01-28 05:04:17,189 WARN L839 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_2277 (Array Int Int)) (v_ArrVal_2276 (Array Int Int))) (or (= (mod (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2276) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2277) c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset (* ~M~0 4))) c_~sum3~0 c_~sum2~0 (select .cse0 c_~A~0.offset))) 4294967296) (mod c_~sum1~0 4294967296)) (<= ~M~0 0) (< 1 ~M~0))) is different from false [2023-01-28 05:04:17,388 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 05:04:17,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 190 treesize of output 146 [2023-01-28 05:04:17,397 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 05:04:17,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 94 [2023-01-28 05:04:17,406 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 05:04:17,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2023-01-28 05:04:17,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:04:17,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769410192] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:04:17,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:04:17,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 37 [2023-01-28 05:04:17,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3232706] [2023-01-28 05:04:17,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:04:17,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-28 05:04:17,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:04:17,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-28 05:04:17,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1177, Unknown=8, NotChecked=142, Total=1482 [2023-01-28 05:04:17,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 281 [2023-01-28 05:04:17,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 1562 transitions, 39338 flow. Second operand has 39 states, 39 states have (on average 76.97435897435898) internal successors, (3002), 39 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states 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 05:04:17,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:04:17,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 281 [2023-01-28 05:04:17,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:04:28,125 INFO L130 PetriNetUnfolder]: 13383/20213 cut-off events. [2023-01-28 05:04:28,125 INFO L131 PetriNetUnfolder]: For 819983/819983 co-relation queries the response was YES. [2023-01-28 05:04:28,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246690 conditions, 20213 events. 13383/20213 cut-off events. For 819983/819983 co-relation queries the response was YES. Maximal size of possible extension queue 997. Compared 131540 event pairs, 1170 based on Foata normal form. 2/20215 useless extension candidates. Maximal degree in co-relation 246554. Up to 15871 conditions per place. [2023-01-28 05:04:28,412 INFO L137 encePairwiseOnDemand]: 268/281 looper letters, 1607 selfloop transitions, 804 changer transitions 1/2412 dead transitions. [2023-01-28 05:04:28,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 2412 transitions, 66430 flow [2023-01-28 05:04:28,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 05:04:28,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 05:04:28,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2934 transitions. [2023-01-28 05:04:28,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29832231825114386 [2023-01-28 05:04:28,414 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2934 transitions. [2023-01-28 05:04:28,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2934 transitions. [2023-01-28 05:04:28,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:04:28,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2934 transitions. [2023-01-28 05:04:28,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 83.82857142857142) internal successors, (2934), 35 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states 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 05:04:28,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 281.0) internal successors, (10116), 36 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states 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 05:04:28,422 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 281.0) internal successors, (10116), 36 states have internal predecessors, (10116), 0 states have call successors, (0), 0 states 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 05:04:28,422 INFO L175 Difference]: Start difference. First operand has 378 places, 1562 transitions, 39338 flow. Second operand 35 states and 2934 transitions. [2023-01-28 05:04:28,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 2412 transitions, 66430 flow [2023-01-28 05:04:38,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 2412 transitions, 65046 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-01-28 05:04:38,540 INFO L231 Difference]: Finished difference. Result has 410 places, 2123 transitions, 57932 flow [2023-01-28 05:04:38,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=38606, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=57932, PETRI_PLACES=410, PETRI_TRANSITIONS=2123} [2023-01-28 05:04:38,542 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 380 predicate places. [2023-01-28 05:04:38,542 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 2123 transitions, 57932 flow [2023-01-28 05:04:38,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 76.97435897435898) internal successors, (3002), 39 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states 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 05:04:38,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:04:38,543 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:04:38,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-01-28 05:04:38,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:04:38,749 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 05:04:38,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:04:38,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1443181227, now seen corresponding path program 8 times [2023-01-28 05:04:38,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:04:38,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569172179] [2023-01-28 05:04:38,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:04:38,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:04:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:04:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:04:39,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:04:39,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569172179] [2023-01-28 05:04:39,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569172179] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:04:39,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708597037] [2023-01-28 05:04:39,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:04:39,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:04:39,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:04:39,637 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:04:39,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-01-28 05:04:40,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:04:40,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:04:40,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 65 conjunts are in the unsatisfiable core [2023-01-28 05:04:40,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:04:40,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 05:04:40,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2023-01-28 05:04:40,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:04:40,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2023-01-28 05:04:40,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:04:40,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2023-01-28 05:04:40,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:04:40,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2023-01-28 05:04:40,996 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 05:04:40,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:04:41,000 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:04:41,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 31 [2023-01-28 05:04:41,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:04:41,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:04:41,738 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2332 (Array Int Int)) (v_ArrVal_2331 (Array Int Int)) (v_thread3Thread1of1ForFork1_~i~2_162 Int)) (or (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2331) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2332) c_~A~0.base))) (let ((.cse1 (select .cse0 c_~A~0.offset))) (= (mod (+ (select .cse0 (+ c_~A~0.offset 4)) c_~sum1~0 .cse1) 4294967296) (mod (+ (select .cse0 (+ c_~A~0.offset (* v_thread3Thread1of1ForFork1_~i~2_162 4))) .cse1 c_~sum3~0 c_~sum2~0) 4294967296)))) (< v_thread3Thread1of1ForFork1_~i~2_162 1) (<= c_~N~0 v_thread3Thread1of1ForFork1_~i~2_162))) is different from false [2023-01-28 05:04:45,240 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:04:45,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 152 treesize of output 98 [2023-01-28 05:04:45,313 INFO L321 Elim1Store]: treesize reduction 8, result has 88.4 percent of original size [2023-01-28 05:04:45,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 664 treesize of output 646 [2023-01-28 05:04:45,335 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 05:04:45,344 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:04:45,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 114 [2023-01-28 05:04:45,356 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 05:04:45,363 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:04:45,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 100 [2023-01-28 05:04:45,396 INFO L321 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2023-01-28 05:04:45,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 99 [2023-01-28 05:06:25,081 WARN L222 SmtUtils]: Spent 1.54m on a formula simplification. DAG size of input: 73 DAG size of output: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:06:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:06:25,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708597037] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:06:25,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:06:25,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-01-28 05:06:25,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834020497] [2023-01-28 05:06:25,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:06:25,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-28 05:06:25,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:06:25,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-28 05:06:25,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1328, Unknown=8, NotChecked=76, Total=1640 [2023-01-28 05:06:25,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 281 [2023-01-28 05:06:25,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 2123 transitions, 57932 flow. Second operand has 41 states, 41 states have (on average 73.90243902439025) internal successors, (3030), 41 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states 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 05:06:25,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:06:25,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 281 [2023-01-28 05:06:25,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:05,597 WARN L222 SmtUtils]: Spent 1.65m on a formula simplification. DAG size of input: 176 DAG size of output: 153 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:09:56,203 WARN L222 SmtUtils]: Spent 1.77m on a formula simplification. DAG size of input: 152 DAG size of output: 129 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2023-01-28 05:11:35,684 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 05:11:35,684 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 05:11:36,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-01-28 05:11:36,885 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2023-01-28 05:11:36,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 05:11:36,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2023-01-28 05:11:36,914 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Not enough levels on assertion stack at de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:272) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.pop(UndoableWrapperScript.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.restore(UndoableWrapperScript.java:87) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:236) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:160) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:376) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:232) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.NestedWordAutomataUtils.getSuccessorState(NestedWordAutomataUtils.java:483) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getOrConstructTransition(DifferencePetriNet.java:279) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getTransitions(DifferencePetriNet.java:261) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.addFullyInstantiatedCandidate(PossibleExtensions.java:168) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:195) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.update(PossibleExtensions.java:135) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.computeUnfoldingHelper(PetriNetUnfolder.java:209) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.computeUnfolding(PetriNetUnfolder.java:168) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.(PetriNetUnfolder.java:129) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:76) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:64) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePairwiseOnDemand.(DifferencePairwiseOnDemand.java:125) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.enhanceAnddeterminizeInterpolantAutomaton(CegarLoopForPetriNet.java:481) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.refineAbstraction(CegarLoopForPetriNet.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-01-28 05:11:36,917 INFO L158 Benchmark]: Toolchain (without parser) took 812220.54ms. Allocated memory was 316.7MB in the beginning and 13.3GB in the end (delta: 13.0GB). Free memory was 275.4MB in the beginning and 8.4GB in the end (delta: -8.1GB). Peak memory consumption was 4.9GB. Max. memory is 16.0GB. [2023-01-28 05:11:36,917 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory was 212.8MB in the beginning and 212.6MB in the end (delta: 169.3kB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 05:11:36,917 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.34ms. Allocated memory is still 316.7MB. Free memory was 275.4MB in the beginning and 263.9MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 05:11:36,918 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.74ms. Allocated memory is still 316.7MB. Free memory was 263.9MB in the beginning and 262.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 05:11:36,918 INFO L158 Benchmark]: Boogie Preprocessor took 25.26ms. Allocated memory is still 316.7MB. Free memory was 262.1MB in the beginning and 260.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 05:11:36,918 INFO L158 Benchmark]: RCFGBuilder took 515.45ms. Allocated memory is still 316.7MB. Free memory was 260.4MB in the beginning and 243.3MB in the end (delta: 17.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-01-28 05:11:36,918 INFO L158 Benchmark]: TraceAbstraction took 811412.55ms. Allocated memory was 316.7MB in the beginning and 13.3GB in the end (delta: 13.0GB). Free memory was 242.8MB in the beginning and 8.4GB in the end (delta: -8.1GB). Peak memory consumption was 4.9GB. Max. memory is 16.0GB. [2023-01-28 05:11:36,919 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### [2023-01-28 05:11:36,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory was 212.8MB in the beginning and 212.6MB in the end (delta: 169.3kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 228.34ms. Allocated memory is still 316.7MB. Free memory was 275.4MB in the beginning and 263.9MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 29.74ms. Allocated memory is still 316.7MB. Free memory was 263.9MB in the beginning and 262.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 25.26ms. Allocated memory is still 316.7MB. Free memory was 262.1MB in the beginning and 260.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 515.45ms. Allocated memory is still 316.7MB. Free memory was 260.4MB in the beginning and 243.3MB in the end (delta: 17.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 811412.55ms. Allocated memory was 316.7MB in the beginning and 13.3GB in the end (delta: 13.0GB). Free memory was 242.8MB in the beginning and 8.4GB in the end (delta: -8.1GB). Peak memory consumption was 4.9GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.1s, 136 PlacesBefore, 30 PlacesAfterwards, 138 TransitionsBefore, 24 TransitionsAfterwards, 1728 CoEnabledTransitionPairs, 7 FixpointIterations, 70 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 13 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 130 TotalNumberOfCompositions, 1910 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1752, independent: 1732, independent conditional: 0, independent unconditional: 1732, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 917, independent: 906, independent conditional: 0, independent unconditional: 906, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1752, independent: 826, independent conditional: 0, independent unconditional: 826, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 917, unknown conditional: 0, unknown unconditional: 917] , Statistics on independence cache: Total cache size (in pairs): 50, Positive cache size: 48, Positive conditional cache size: 0, Positive unconditional cache size: 48, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: Not enough levels on assertion stack de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Not enough levels on assertion stack: de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:272) RESULT: Ultimate could not prove your program: Toolchain returned no result. Completed graceful shutdown