/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/chl-name-comparator-trans.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 02:45:32,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 02:45:32,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 02:45:32,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 02:45:32,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 02:45:32,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 02:45:32,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 02:45:32,757 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 02:45:32,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 02:45:32,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 02:45:32,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 02:45:32,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 02:45:32,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 02:45:32,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 02:45:32,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 02:45:32,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 02:45:32,763 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 02:45:32,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 02:45:32,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 02:45:32,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 02:45:32,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 02:45:32,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 02:45:32,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 02:45:32,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 02:45:32,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 02:45:32,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 02:45:32,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 02:45:32,771 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 02:45:32,772 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 02:45:32,772 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 02:45:32,772 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 02:45:32,773 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 02:45:32,773 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 02:45:32,774 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 02:45:32,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 02:45:32,775 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 02:45:32,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 02:45:32,775 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 02:45:32,775 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 02:45:32,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 02:45:32,776 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 02:45:32,777 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 02:45:32,790 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 02:45:32,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 02:45:32,790 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 02:45:32,791 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 02:45:32,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 02:45:32,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 02:45:32,791 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 02:45:32,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 02:45:32,791 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 02:45:32,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 02:45:32,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 02:45:32,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 02:45:32,792 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 02:45:32,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 02:45:32,792 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 02:45:32,792 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 02:45:32,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 02:45:32,792 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 02:45:32,792 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 02:45:32,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 02:45:32,792 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 02:45:32,792 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 02:45:32,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 02:45:32,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 02:45:32,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 02:45:32,793 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 02:45:32,793 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 02:45:32,793 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 02:45:32,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 02:45:32,793 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 02:45:32,793 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 02:45:32,793 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 02:45:32,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 02:45:33,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 02:45:33,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 02:45:33,005 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 02:45:33,006 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 02:45:33,007 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2023-01-28 02:45:33,989 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 02:45:34,161 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 02:45:34,162 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2023-01-28 02:45:34,168 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e904d4b7d/0239db0e2319441786ec2dc52385eda2/FLAG6fa41d5fa [2023-01-28 02:45:34,183 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e904d4b7d/0239db0e2319441786ec2dc52385eda2 [2023-01-28 02:45:34,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 02:45:34,186 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 02:45:34,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 02:45:34,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 02:45:34,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 02:45:34,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 02:45:34" (1/1) ... [2023-01-28 02:45:34,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4327f70f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:34, skipping insertion in model container [2023-01-28 02:45:34,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 02:45:34" (1/1) ... [2023-01-28 02:45:34,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 02:45:34,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 02:45:34,365 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/chl-name-comparator-trans.wvr.c[4788,4801] [2023-01-28 02:45:34,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 02:45:34,382 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 02:45:34,401 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/chl-name-comparator-trans.wvr.c[4788,4801] [2023-01-28 02:45:34,404 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 02:45:34,414 INFO L208 MainTranslator]: Completed translation [2023-01-28 02:45:34,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:34 WrapperNode [2023-01-28 02:45:34,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 02:45:34,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 02:45:34,415 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 02:45:34,416 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 02:45:34,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:34" (1/1) ... [2023-01-28 02:45:34,434 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:34" (1/1) ... [2023-01-28 02:45:34,471 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 316 [2023-01-28 02:45:34,471 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 02:45:34,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 02:45:34,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 02:45:34,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 02:45:34,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:34" (1/1) ... [2023-01-28 02:45:34,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:34" (1/1) ... [2023-01-28 02:45:34,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:34" (1/1) ... [2023-01-28 02:45:34,487 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:34" (1/1) ... [2023-01-28 02:45:34,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:34" (1/1) ... [2023-01-28 02:45:34,495 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:34" (1/1) ... [2023-01-28 02:45:34,533 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:34" (1/1) ... [2023-01-28 02:45:34,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:34" (1/1) ... [2023-01-28 02:45:34,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 02:45:34,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 02:45:34,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 02:45:34,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 02:45:34,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:34" (1/1) ... [2023-01-28 02:45:34,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 02:45:34,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:45:34,596 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 02:45:34,598 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 02:45:34,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 02:45:34,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 02:45:34,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 02:45:34,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 02:45:34,628 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 02:45:34,629 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 02:45:34,629 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 02:45:34,629 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 02:45:34,629 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-28 02:45:34,629 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-28 02:45:34,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 02:45:34,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 02:45:34,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 02:45:34,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 02:45:34,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 02:45:34,633 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 02:45:34,763 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 02:45:34,764 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 02:45:35,139 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 02:45:35,147 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 02:45:35,148 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-01-28 02:45:35,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 02:45:35 BoogieIcfgContainer [2023-01-28 02:45:35,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 02:45:35,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 02:45:35,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 02:45:35,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 02:45:35,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 02:45:34" (1/3) ... [2023-01-28 02:45:35,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@726b49b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 02:45:35, skipping insertion in model container [2023-01-28 02:45:35,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 02:45:34" (2/3) ... [2023-01-28 02:45:35,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@726b49b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 02:45:35, skipping insertion in model container [2023-01-28 02:45:35,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 02:45:35" (3/3) ... [2023-01-28 02:45:35,155 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2023-01-28 02:45:35,165 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 02:45:35,165 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 02:45:35,166 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 02:45:35,236 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 02:45:35,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 344 places, 360 transitions, 744 flow [2023-01-28 02:45:35,376 INFO L130 PetriNetUnfolder]: 26/357 cut-off events. [2023-01-28 02:45:35,376 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 02:45:35,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 357 events. 26/357 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 808 event pairs, 0 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 268. Up to 2 conditions per place. [2023-01-28 02:45:35,384 INFO L82 GeneralOperation]: Start removeDead. Operand has 344 places, 360 transitions, 744 flow [2023-01-28 02:45:35,394 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 331 places, 347 transitions, 712 flow [2023-01-28 02:45:35,397 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 02:45:35,410 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 331 places, 347 transitions, 712 flow [2023-01-28 02:45:35,414 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 331 places, 347 transitions, 712 flow [2023-01-28 02:45:35,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 331 places, 347 transitions, 712 flow [2023-01-28 02:45:35,472 INFO L130 PetriNetUnfolder]: 26/347 cut-off events. [2023-01-28 02:45:35,472 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 02:45:35,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 347 events. 26/347 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 807 event pairs, 0 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 268. Up to 2 conditions per place. [2023-01-28 02:45:35,485 INFO L119 LiptonReduction]: Number of co-enabled transitions 28350 [2023-01-28 02:45:43,509 INFO L134 LiptonReduction]: Checked pairs total: 26332 [2023-01-28 02:45:43,510 INFO L136 LiptonReduction]: Total number of compositions: 411 [2023-01-28 02:45:43,521 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 02:45:43,525 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;@53acf40, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 02:45:43,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 02:45:43,530 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2023-01-28 02:45:43,530 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 02:45:43,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:43,531 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 02:45:43,531 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 02:45:43,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:43,534 INFO L85 PathProgramCache]: Analyzing trace with hash 938001691, now seen corresponding path program 1 times [2023-01-28 02:45:43,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:43,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651512093] [2023-01-28 02:45:43,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:43,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:43,890 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 02:45:43,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:43,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651512093] [2023-01-28 02:45:43,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651512093] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:45:43,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:45:43,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 02:45:43,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079847254] [2023-01-28 02:45:43,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:45:43,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 02:45:43,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:43,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 02:45:43,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 02:45:43,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 771 [2023-01-28 02:45:43,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 329.6666666666667) internal successors, (989), 3 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:45:43,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:43,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 771 [2023-01-28 02:45:43,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:43,996 INFO L130 PetriNetUnfolder]: 221/328 cut-off events. [2023-01-28 02:45:43,996 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2023-01-28 02:45:43,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700 conditions, 328 events. 221/328 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 771 event pairs, 138 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 534. Up to 328 conditions per place. [2023-01-28 02:45:43,999 INFO L137 encePairwiseOnDemand]: 768/771 looper letters, 23 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-01-28 02:45:43,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 118 flow [2023-01-28 02:45:43,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 02:45:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 02:45:44,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 995 transitions. [2023-01-28 02:45:44,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4301772589710333 [2023-01-28 02:45:44,015 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 995 transitions. [2023-01-28 02:45:44,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 995 transitions. [2023-01-28 02:45:44,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:44,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 995 transitions. [2023-01-28 02:45:44,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 331.6666666666667) internal successors, (995), 3 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:45:44,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 771.0) internal successors, (3084), 4 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:45:44,029 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 771.0) internal successors, (3084), 4 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:45:44,031 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 995 transitions. [2023-01-28 02:45:44,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 118 flow [2023-01-28 02:45:44,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 106 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-28 02:45:44,034 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2023-01-28 02:45:44,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, 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=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2023-01-28 02:45:44,040 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-01-28 02:45:44,040 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2023-01-28 02:45:44,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 329.6666666666667) internal successors, (989), 3 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:45:44,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:44,041 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] [2023-01-28 02:45:44,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 02:45:44,042 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 02:45:44,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:44,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1524160958, now seen corresponding path program 1 times [2023-01-28 02:45:44,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:44,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676726906] [2023-01-28 02:45:44,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:44,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:44,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:45:44,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:44,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676726906] [2023-01-28 02:45:44,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676726906] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:45:44,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177279390] [2023-01-28 02:45:44,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:44,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:45:44,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:45:44,215 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 02:45:44,249 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 02:45:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:44,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-28 02:45:44,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:45:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:45:44,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:45:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:45:44,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177279390] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:45:44,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:45:44,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-28 02:45:44,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638231178] [2023-01-28 02:45:44,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:45:44,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 02:45:44,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:44,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 02:45:44,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-28 02:45:44,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 771 [2023-01-28 02:45:44,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 326.85714285714283) internal successors, (2288), 7 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:45:44,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:44,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 771 [2023-01-28 02:45:44,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:44,472 INFO L130 PetriNetUnfolder]: 221/330 cut-off events. [2023-01-28 02:45:44,472 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 02:45:44,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 330 events. 221/330 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 771 event pairs, 138 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 673. Up to 328 conditions per place. [2023-01-28 02:45:44,473 INFO L137 encePairwiseOnDemand]: 768/771 looper letters, 23 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-01-28 02:45:44,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 128 flow [2023-01-28 02:45:44,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 02:45:44,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 02:45:44,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1644 transitions. [2023-01-28 02:45:44,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264591439688716 [2023-01-28 02:45:44,476 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1644 transitions. [2023-01-28 02:45:44,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1644 transitions. [2023-01-28 02:45:44,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:44,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1644 transitions. [2023-01-28 02:45:44,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 328.8) internal successors, (1644), 5 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:45:44,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 771.0) internal successors, (4626), 6 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:45:44,485 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 771.0) internal successors, (4626), 6 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:45:44,485 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 5 states and 1644 transitions. [2023-01-28 02:45:44,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 128 flow [2023-01-28 02:45:44,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 124 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 02:45:44,487 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 88 flow [2023-01-28 02:45:44,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-01-28 02:45:44,487 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-01-28 02:45:44,487 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 88 flow [2023-01-28 02:45:44,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 326.85714285714283) internal successors, (2288), 7 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:45:44,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:44,489 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:45:44,506 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 02:45:44,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:45:44,694 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 02:45:44,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:44,695 INFO L85 PathProgramCache]: Analyzing trace with hash -793936030, now seen corresponding path program 2 times [2023-01-28 02:45:44,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:44,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445633074] [2023-01-28 02:45:44,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:44,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:45,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:45,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445633074] [2023-01-28 02:45:45,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445633074] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:45:45,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:45:45,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 02:45:45,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846244141] [2023-01-28 02:45:45,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:45:45,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 02:45:45,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:45,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 02:45:45,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 02:45:45,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 771 [2023-01-28 02:45:45,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 289.2) internal successors, (1446), 5 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:45:45,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:45,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 771 [2023-01-28 02:45:45,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:45,211 INFO L130 PetriNetUnfolder]: 381/567 cut-off events. [2023-01-28 02:45:45,211 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-28 02:45:45,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 567 events. 381/567 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1711 event pairs, 138 based on Foata normal form. 1/418 useless extension candidates. Maximal degree in co-relation 1148. Up to 331 conditions per place. [2023-01-28 02:45:45,214 INFO L137 encePairwiseOnDemand]: 767/771 looper letters, 37 selfloop transitions, 2 changer transitions 17/56 dead transitions. [2023-01-28 02:45:45,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 265 flow [2023-01-28 02:45:45,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 02:45:45,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 02:45:45,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1194 transitions. [2023-01-28 02:45:45,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38715953307393 [2023-01-28 02:45:45,216 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1194 transitions. [2023-01-28 02:45:45,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1194 transitions. [2023-01-28 02:45:45,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:45,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1194 transitions. [2023-01-28 02:45:45,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 298.5) internal successors, (1194), 4 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:45:45,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:45:45,224 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:45:45,224 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 88 flow. Second operand 4 states and 1194 transitions. [2023-01-28 02:45:45,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 265 flow [2023-01-28 02:45:45,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 56 transitions, 255 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-01-28 02:45:45,226 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 92 flow [2023-01-28 02:45:45,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-01-28 02:45:45,228 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-01-28 02:45:45,228 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 92 flow [2023-01-28 02:45:45,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 289.2) internal successors, (1446), 5 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:45:45,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:45,229 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 02:45:45,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 02:45:45,229 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 02:45:45,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:45,230 INFO L85 PathProgramCache]: Analyzing trace with hash 529846484, now seen corresponding path program 1 times [2023-01-28 02:45:45,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:45,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977983046] [2023-01-28 02:45:45,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:45,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:45,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:45,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977983046] [2023-01-28 02:45:45,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977983046] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 02:45:45,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 02:45:45,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 02:45:45,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690236378] [2023-01-28 02:45:45,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 02:45:45,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 02:45:45,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:45,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 02:45:45,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 02:45:45,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 295 out of 771 [2023-01-28 02:45:45,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 300.5) internal successors, (1202), 4 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:45:45,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:45,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 295 of 771 [2023-01-28 02:45:45,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:45:45,630 INFO L130 PetriNetUnfolder]: 462/680 cut-off events. [2023-01-28 02:45:45,631 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2023-01-28 02:45:45,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1614 conditions, 680 events. 462/680 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2167 event pairs, 183 based on Foata normal form. 1/509 useless extension candidates. Maximal degree in co-relation 1602. Up to 416 conditions per place. [2023-01-28 02:45:45,634 INFO L137 encePairwiseOnDemand]: 767/771 looper letters, 39 selfloop transitions, 2 changer transitions 16/57 dead transitions. [2023-01-28 02:45:45,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 57 transitions, 290 flow [2023-01-28 02:45:45,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 02:45:45,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 02:45:45,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1232 transitions. [2023-01-28 02:45:45,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39948119325551235 [2023-01-28 02:45:45,637 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1232 transitions. [2023-01-28 02:45:45,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1232 transitions. [2023-01-28 02:45:45,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:45:45,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1232 transitions. [2023-01-28 02:45:45,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 308.0) internal successors, (1232), 4 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:45:45,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:45:45,644 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 771.0) internal successors, (3855), 5 states have internal predecessors, (3855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:45:45,644 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 92 flow. Second operand 4 states and 1232 transitions. [2023-01-28 02:45:45,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 57 transitions, 290 flow [2023-01-28 02:45:45,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 276 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-28 02:45:45,647 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 100 flow [2023-01-28 02:45:45,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-01-28 02:45:45,648 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-01-28 02:45:45,648 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 100 flow [2023-01-28 02:45:45,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 300.5) internal successors, (1202), 4 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:45:45,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:45:45,649 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 02:45:45,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 02:45:45,649 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 02:45:45,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:45:45,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1499019307, now seen corresponding path program 1 times [2023-01-28 02:45:45,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:45:45,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711674901] [2023-01-28 02:45:45,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:45,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:45:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:47,091 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 02:45:47,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:45:47,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711674901] [2023-01-28 02:45:47,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711674901] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:45:47,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771027594] [2023-01-28 02:45:47,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:45:47,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:45:47,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:45:47,105 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 02:45:47,153 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 02:45:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:45:47,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-28 02:45:47,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:45:47,710 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 202 treesize of output 138 [2023-01-28 02:45:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:48,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:45:49,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:45:49,553 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 200 treesize of output 108 [2023-01-28 02:45:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:45:49,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771027594] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:45:49,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:45:49,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 32 [2023-01-28 02:45:49,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099258844] [2023-01-28 02:45:49,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:45:49,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 02:45:49,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:45:49,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 02:45:49,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 02:45:49,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 771 [2023-01-28 02:45:49,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 100 flow. Second operand has 33 states, 33 states have (on average 231.15151515151516) internal successors, (7628), 33 states have internal predecessors, (7628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:45:49,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:45:49,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 771 [2023-01-28 02:45:49,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:46:07,150 INFO L130 PetriNetUnfolder]: 2871/4544 cut-off events. [2023-01-28 02:46:07,151 INFO L131 PetriNetUnfolder]: For 1055/1055 co-relation queries the response was YES. [2023-01-28 02:46:07,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11251 conditions, 4544 events. 2871/4544 cut-off events. For 1055/1055 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 25278 event pairs, 148 based on Foata normal form. 15/3302 useless extension candidates. Maximal degree in co-relation 11225. Up to 1113 conditions per place. [2023-01-28 02:46:07,168 INFO L137 encePairwiseOnDemand]: 758/771 looper letters, 603 selfloop transitions, 231 changer transitions 99/933 dead transitions. [2023-01-28 02:46:07,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 933 transitions, 4425 flow [2023-01-28 02:46:07,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-01-28 02:46:07,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2023-01-28 02:46:07,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 26585 transitions. [2023-01-28 02:46:07,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3078677969242172 [2023-01-28 02:46:07,215 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 26585 transitions. [2023-01-28 02:46:07,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 26585 transitions. [2023-01-28 02:46:07,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:46:07,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 26585 transitions. [2023-01-28 02:46:07,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 113 states, 112 states have (on average 237.36607142857142) internal successors, (26585), 112 states have internal predecessors, (26585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:46:07,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 113 states, 113 states have (on average 771.0) internal successors, (87123), 113 states have internal predecessors, (87123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:46:07,369 INFO L81 ComplementDD]: Finished complementDD. Result has 113 states, 113 states have (on average 771.0) internal successors, (87123), 113 states have internal predecessors, (87123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:46:07,370 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 100 flow. Second operand 112 states and 26585 transitions. [2023-01-28 02:46:07,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 933 transitions, 4425 flow [2023-01-28 02:46:07,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 933 transitions, 4305 flow, removed 48 selfloop flow, removed 2 redundant places. [2023-01-28 02:46:07,383 INFO L231 Difference]: Finished difference. Result has 216 places, 271 transitions, 1851 flow [2023-01-28 02:46:07,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=1851, PETRI_PLACES=216, PETRI_TRANSITIONS=271} [2023-01-28 02:46:07,385 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2023-01-28 02:46:07,385 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 271 transitions, 1851 flow [2023-01-28 02:46:07,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 231.15151515151516) internal successors, (7628), 33 states have internal predecessors, (7628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:46:07,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:46:07,387 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 02:46:07,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-28 02:46:07,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:07,594 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 02:46:07,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:46:07,595 INFO L85 PathProgramCache]: Analyzing trace with hash -99656019, now seen corresponding path program 2 times [2023-01-28 02:46:07,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:46:07,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595127629] [2023-01-28 02:46:07,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:46:07,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:46:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:46:08,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:08,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:46:08,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595127629] [2023-01-28 02:46:08,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595127629] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:46:08,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431186629] [2023-01-28 02:46:08,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:46:08,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:08,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:46:08,581 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 02:46:08,583 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 02:46:08,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:46:08,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:46:08,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 48 conjunts are in the unsatisfiable core [2023-01-28 02:46:08,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:46:08,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:46:08,952 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 100 treesize of output 90 [2023-01-28 02:46:09,673 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 171 treesize of output 115 [2023-01-28 02:46:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:09,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:46:10,770 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:46:10,770 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 219 treesize of output 139 [2023-01-28 02:46:10,775 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 30 treesize of output 26 [2023-01-28 02:46:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:10,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431186629] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:46:10,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:46:10,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-01-28 02:46:10,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25258104] [2023-01-28 02:46:10,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:46:10,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 02:46:10,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:46:10,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 02:46:10,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1075, Unknown=1, NotChecked=0, Total=1190 [2023-01-28 02:46:10,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 771 [2023-01-28 02:46:10,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 271 transitions, 1851 flow. Second operand has 35 states, 35 states have (on average 238.97142857142856) internal successors, (8364), 35 states have internal predecessors, (8364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:46:10,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:46:10,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 771 [2023-01-28 02:46:10,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:46:21,673 INFO L130 PetriNetUnfolder]: 6428/10131 cut-off events. [2023-01-28 02:46:21,674 INFO L131 PetriNetUnfolder]: For 601915/601915 co-relation queries the response was YES. [2023-01-28 02:46:21,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109709 conditions, 10131 events. 6428/10131 cut-off events. For 601915/601915 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 64574 event pairs, 460 based on Foata normal form. 5/8713 useless extension candidates. Maximal degree in co-relation 109612. Up to 3098 conditions per place. [2023-01-28 02:46:21,800 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 416 selfloop transitions, 522 changer transitions 25/963 dead transitions. [2023-01-28 02:46:21,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 963 transitions, 11580 flow [2023-01-28 02:46:21,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-01-28 02:46:21,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-01-28 02:46:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 12488 transitions. [2023-01-28 02:46:21,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31759110907657484 [2023-01-28 02:46:21,811 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 12488 transitions. [2023-01-28 02:46:21,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 12488 transitions. [2023-01-28 02:46:21,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:46:21,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 12488 transitions. [2023-01-28 02:46:21,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 244.86274509803923) internal successors, (12488), 51 states have internal predecessors, (12488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:46:21,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 771.0) internal successors, (40092), 52 states have internal predecessors, (40092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:46:21,856 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 771.0) internal successors, (40092), 52 states have internal predecessors, (40092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:46:21,856 INFO L175 Difference]: Start difference. First operand has 216 places, 271 transitions, 1851 flow. Second operand 51 states and 12488 transitions. [2023-01-28 02:46:21,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 963 transitions, 11580 flow [2023-01-28 02:46:23,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 963 transitions, 10471 flow, removed 518 selfloop flow, removed 17 redundant places. [2023-01-28 02:46:23,306 INFO L231 Difference]: Finished difference. Result has 254 places, 671 transitions, 8994 flow [2023-01-28 02:46:23,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=8994, PETRI_PLACES=254, PETRI_TRANSITIONS=671} [2023-01-28 02:46:23,307 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 224 predicate places. [2023-01-28 02:46:23,307 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 671 transitions, 8994 flow [2023-01-28 02:46:23,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 238.97142857142856) internal successors, (8364), 35 states have internal predecessors, (8364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:46:23,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:46:23,309 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 02:46:23,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-28 02:46:23,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:23,514 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 02:46:23,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:46:23,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1692020307, now seen corresponding path program 3 times [2023-01-28 02:46:23,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:46:23,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843349530] [2023-01-28 02:46:23,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:46:23,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:46:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:46:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:24,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:46:24,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843349530] [2023-01-28 02:46:24,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843349530] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:46:24,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961259414] [2023-01-28 02:46:24,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 02:46:24,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:24,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:46:24,240 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 02:46:24,241 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 02:46:24,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 02:46:24,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:46:24,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 02:46:24,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:46:24,875 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 133 treesize of output 89 [2023-01-28 02:46:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:25,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:46:25,656 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:46:25,656 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 136 treesize of output 76 [2023-01-28 02:46:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:25,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961259414] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:46:25,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:46:25,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-01-28 02:46:25,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579987519] [2023-01-28 02:46:25,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:46:25,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 02:46:25,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:46:25,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 02:46:25,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-01-28 02:46:25,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 771 [2023-01-28 02:46:25,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 671 transitions, 8994 flow. Second operand has 22 states, 22 states have (on average 259.8181818181818) internal successors, (5716), 22 states have internal predecessors, (5716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:46:25,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:46:25,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 771 [2023-01-28 02:46:25,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:46:30,301 INFO L130 PetriNetUnfolder]: 8336/12983 cut-off events. [2023-01-28 02:46:30,301 INFO L131 PetriNetUnfolder]: For 877237/877237 co-relation queries the response was YES. [2023-01-28 02:46:30,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147306 conditions, 12983 events. 8336/12983 cut-off events. For 877237/877237 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 83351 event pairs, 1143 based on Foata normal form. 8/11887 useless extension candidates. Maximal degree in co-relation 147205. Up to 3916 conditions per place. [2023-01-28 02:46:30,444 INFO L137 encePairwiseOnDemand]: 761/771 looper letters, 962 selfloop transitions, 361 changer transitions 71/1394 dead transitions. [2023-01-28 02:46:30,445 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 1394 transitions, 30002 flow [2023-01-28 02:46:30,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 02:46:30,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 02:46:30,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 7750 transitions. [2023-01-28 02:46:30,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.346616574980992 [2023-01-28 02:46:30,451 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 7750 transitions. [2023-01-28 02:46:30,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 7750 transitions. [2023-01-28 02:46:30,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:46:30,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 7750 transitions. [2023-01-28 02:46:30,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 267.2413793103448) internal successors, (7750), 29 states have internal predecessors, (7750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:46:30,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 771.0) internal successors, (23130), 30 states have internal predecessors, (23130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:46:30,470 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 771.0) internal successors, (23130), 30 states have internal predecessors, (23130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:46:30,470 INFO L175 Difference]: Start difference. First operand has 254 places, 671 transitions, 8994 flow. Second operand 29 states and 7750 transitions. [2023-01-28 02:46:30,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 1394 transitions, 30002 flow [2023-01-28 02:46:53,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1394 transitions, 13642 flow, removed 8142 selfloop flow, removed 4 redundant places. [2023-01-28 02:46:53,150 INFO L231 Difference]: Finished difference. Result has 297 places, 875 transitions, 7455 flow [2023-01-28 02:46:53,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=4670, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=7455, PETRI_PLACES=297, PETRI_TRANSITIONS=875} [2023-01-28 02:46:53,151 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 267 predicate places. [2023-01-28 02:46:53,151 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 875 transitions, 7455 flow [2023-01-28 02:46:53,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 259.8181818181818) internal successors, (5716), 22 states have internal predecessors, (5716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:46:53,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:46:53,152 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 02:46:53,157 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 02:46:53,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:53,354 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 02:46:53,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:46:53,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1447694667, now seen corresponding path program 4 times [2023-01-28 02:46:53,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:46:53,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157736770] [2023-01-28 02:46:53,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:46:53,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:46:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:46:53,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:53,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:46:53,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157736770] [2023-01-28 02:46:53,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157736770] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:46:53,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984656831] [2023-01-28 02:46:53,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 02:46:53,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:46:53,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:46:53,985 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 02:46:53,996 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 02:46:54,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 02:46:54,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:46:54,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 02:46:54,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:46:54,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 02:46:54,439 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 37 [2023-01-28 02:46:54,520 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 125 treesize of output 81 [2023-01-28 02:46:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:54,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:46:55,925 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:46:55,926 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 212 treesize of output 132 [2023-01-28 02:46:55,932 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 46 treesize of output 44 [2023-01-28 02:46:55,937 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 44 treesize of output 42 [2023-01-28 02:46:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:46:56,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984656831] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:46:56,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:46:56,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2023-01-28 02:46:56,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239003027] [2023-01-28 02:46:56,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:46:56,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 02:46:56,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:46:56,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 02:46:56,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=928, Unknown=19, NotChecked=0, Total=1056 [2023-01-28 02:46:56,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 771 [2023-01-28 02:46:56,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 875 transitions, 7455 flow. Second operand has 33 states, 33 states have (on average 239.0909090909091) internal successors, (7890), 33 states have internal predecessors, (7890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:46:56,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:46:56,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 771 [2023-01-28 02:46:56,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:47:06,546 INFO L130 PetriNetUnfolder]: 13942/22118 cut-off events. [2023-01-28 02:47:06,546 INFO L131 PetriNetUnfolder]: For 243772/243772 co-relation queries the response was YES. [2023-01-28 02:47:06,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120382 conditions, 22118 events. 13942/22118 cut-off events. For 243772/243772 co-relation queries the response was YES. Maximal size of possible extension queue 1177. Compared 159485 event pairs, 1693 based on Foata normal form. 21/20315 useless extension candidates. Maximal degree in co-relation 120274. Up to 4592 conditions per place. [2023-01-28 02:47:06,785 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 1215 selfloop transitions, 693 changer transitions 73/1981 dead transitions. [2023-01-28 02:47:06,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 1981 transitions, 22237 flow [2023-01-28 02:47:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-28 02:47:06,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-28 02:47:06,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 9387 transitions. [2023-01-28 02:47:06,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.320397296743805 [2023-01-28 02:47:06,793 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 9387 transitions. [2023-01-28 02:47:06,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 9387 transitions. [2023-01-28 02:47:06,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:47:06,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 9387 transitions. [2023-01-28 02:47:06,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 247.02631578947367) internal successors, (9387), 38 states have internal predecessors, (9387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:47:06,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 771.0) internal successors, (30069), 39 states have internal predecessors, (30069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:47:06,818 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 771.0) internal successors, (30069), 39 states have internal predecessors, (30069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:47:06,819 INFO L175 Difference]: Start difference. First operand has 297 places, 875 transitions, 7455 flow. Second operand 38 states and 9387 transitions. [2023-01-28 02:47:06,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 1981 transitions, 22237 flow [2023-01-28 02:47:09,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 1981 transitions, 21793 flow, removed 186 selfloop flow, removed 8 redundant places. [2023-01-28 02:47:09,259 INFO L231 Difference]: Finished difference. Result has 344 places, 1262 transitions, 13766 flow [2023-01-28 02:47:09,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=7250, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=13766, PETRI_PLACES=344, PETRI_TRANSITIONS=1262} [2023-01-28 02:47:09,260 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 314 predicate places. [2023-01-28 02:47:09,260 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 1262 transitions, 13766 flow [2023-01-28 02:47:09,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 239.0909090909091) internal successors, (7890), 33 states have internal predecessors, (7890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:47:09,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:47:09,262 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 02:47:09,271 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 02:47:09,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:09,467 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 02:47:09,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:47:09,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1234564250, now seen corresponding path program 5 times [2023-01-28 02:47:09,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:47:09,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887053804] [2023-01-28 02:47:09,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:47:09,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:47:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:47:10,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:47:10,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887053804] [2023-01-28 02:47:10,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887053804] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:47:10,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872211881] [2023-01-28 02:47:10,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 02:47:10,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:10,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:47:10,641 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 02:47:10,643 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 02:47:10,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 02:47:10,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:47:10,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 02:47:10,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:47:10,997 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 104 treesize of output 72 [2023-01-28 02:47:11,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:11,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:47:11,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:47:11,538 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 117 treesize of output 69 [2023-01-28 02:47:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:11,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872211881] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:47:11,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:47:11,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 31 [2023-01-28 02:47:11,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221055810] [2023-01-28 02:47:11,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:47:11,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 02:47:11,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:47:11,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 02:47:11,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2023-01-28 02:47:11,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 771 [2023-01-28 02:47:11,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 1262 transitions, 13766 flow. Second operand has 31 states, 31 states have (on average 239.1290322580645) internal successors, (7413), 31 states have internal predecessors, (7413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:47:11,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:47:11,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 771 [2023-01-28 02:47:11,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:47:22,869 INFO L130 PetriNetUnfolder]: 17917/29495 cut-off events. [2023-01-28 02:47:22,870 INFO L131 PetriNetUnfolder]: For 410292/410292 co-relation queries the response was YES. [2023-01-28 02:47:23,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178763 conditions, 29495 events. 17917/29495 cut-off events. For 410292/410292 co-relation queries the response was YES. Maximal size of possible extension queue 1576. Compared 235297 event pairs, 3142 based on Foata normal form. 64/26993 useless extension candidates. Maximal degree in co-relation 178623. Up to 10768 conditions per place. [2023-01-28 02:47:23,326 INFO L137 encePairwiseOnDemand]: 757/771 looper letters, 1580 selfloop transitions, 715 changer transitions 27/2322 dead transitions. [2023-01-28 02:47:23,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 2322 transitions, 30986 flow [2023-01-28 02:47:23,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-28 02:47:23,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-28 02:47:23,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 10122 transitions. [2023-01-28 02:47:23,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3202049919331878 [2023-01-28 02:47:23,335 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 10122 transitions. [2023-01-28 02:47:23,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 10122 transitions. [2023-01-28 02:47:23,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:47:23,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 10122 transitions. [2023-01-28 02:47:23,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 246.8780487804878) internal successors, (10122), 41 states have internal predecessors, (10122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:47:23,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 771.0) internal successors, (32382), 42 states have internal predecessors, (32382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:47:23,360 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 771.0) internal successors, (32382), 42 states have internal predecessors, (32382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:47:23,360 INFO L175 Difference]: Start difference. First operand has 344 places, 1262 transitions, 13766 flow. Second operand 41 states and 10122 transitions. [2023-01-28 02:47:23,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 2322 transitions, 30986 flow [2023-01-28 02:47:30,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 2322 transitions, 28322 flow, removed 1304 selfloop flow, removed 8 redundant places. [2023-01-28 02:47:30,713 INFO L231 Difference]: Finished difference. Result has 400 places, 1578 transitions, 19480 flow [2023-01-28 02:47:30,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=12694, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=409, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=19480, PETRI_PLACES=400, PETRI_TRANSITIONS=1578} [2023-01-28 02:47:30,719 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 370 predicate places. [2023-01-28 02:47:30,719 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 1578 transitions, 19480 flow [2023-01-28 02:47:30,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 239.1290322580645) internal successors, (7413), 31 states have internal predecessors, (7413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:47:30,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:47:30,720 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 02:47:30,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-01-28 02:47:30,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:30,920 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 02:47:30,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:47:30,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1440443928, now seen corresponding path program 6 times [2023-01-28 02:47:30,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:47:30,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211378223] [2023-01-28 02:47:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:47:30,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:47:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:47:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 02:47:31,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:47:31,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211378223] [2023-01-28 02:47:31,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211378223] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:47:31,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726937128] [2023-01-28 02:47:31,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 02:47:31,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:47:31,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:47:31,844 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 02:47:31,845 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 02:47:31,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 02:47:31,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:47:31,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 02:47:31,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:47:32,208 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 112 treesize of output 80 [2023-01-28 02:47:32,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:32,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:47:32,695 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:47:32,695 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 117 treesize of output 69 [2023-01-28 02:47:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:47:32,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726937128] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:47:32,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:47:32,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 9] total 30 [2023-01-28 02:47:32,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409066968] [2023-01-28 02:47:32,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:47:32,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 02:47:32,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:47:32,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 02:47:32,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2023-01-28 02:47:32,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 771 [2023-01-28 02:47:32,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 1578 transitions, 19480 flow. Second operand has 30 states, 30 states have (on average 239.96666666666667) internal successors, (7199), 30 states have internal predecessors, (7199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:47:32,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:47:32,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 771 [2023-01-28 02:47:32,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:47:58,083 INFO L130 PetriNetUnfolder]: 39088/64313 cut-off events. [2023-01-28 02:47:58,083 INFO L131 PetriNetUnfolder]: For 1186605/1186605 co-relation queries the response was YES. [2023-01-28 02:47:59,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438989 conditions, 64313 events. 39088/64313 cut-off events. For 1186605/1186605 co-relation queries the response was YES. Maximal size of possible extension queue 3353. Compared 567099 event pairs, 9553 based on Foata normal form. 32/58817 useless extension candidates. Maximal degree in co-relation 437467. Up to 20579 conditions per place. [2023-01-28 02:48:00,175 INFO L137 encePairwiseOnDemand]: 758/771 looper letters, 3528 selfloop transitions, 827 changer transitions 0/4355 dead transitions. [2023-01-28 02:48:00,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 4355 transitions, 63280 flow [2023-01-28 02:48:00,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-01-28 02:48:00,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-01-28 02:48:00,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 13458 transitions. [2023-01-28 02:48:00,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32324542441273957 [2023-01-28 02:48:00,184 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 13458 transitions. [2023-01-28 02:48:00,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 13458 transitions. [2023-01-28 02:48:00,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:48:00,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 13458 transitions. [2023-01-28 02:48:00,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 249.22222222222223) internal successors, (13458), 54 states have internal predecessors, (13458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:48:00,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 771.0) internal successors, (42405), 55 states have internal predecessors, (42405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:48:00,214 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 771.0) internal successors, (42405), 55 states have internal predecessors, (42405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:48:00,214 INFO L175 Difference]: Start difference. First operand has 400 places, 1578 transitions, 19480 flow. Second operand 54 states and 13458 transitions. [2023-01-28 02:48:00,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 4355 transitions, 63280 flow [2023-01-28 02:48:39,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 4355 transitions, 60299 flow, removed 1396 selfloop flow, removed 13 redundant places. [2023-01-28 02:48:39,572 INFO L231 Difference]: Finished difference. Result has 472 places, 2136 transitions, 28870 flow [2023-01-28 02:48:39,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=18445, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=28870, PETRI_PLACES=472, PETRI_TRANSITIONS=2136} [2023-01-28 02:48:39,574 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 442 predicate places. [2023-01-28 02:48:39,574 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 2136 transitions, 28870 flow [2023-01-28 02:48:39,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 239.96666666666667) internal successors, (7199), 30 states have internal predecessors, (7199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:48:39,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:48:39,575 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 02:48:39,579 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 02:48:39,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:48:39,779 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 02:48:39,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:48:39,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1001808469, now seen corresponding path program 7 times [2023-01-28 02:48:39,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:48:39,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583131430] [2023-01-28 02:48:39,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:48:39,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:48:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:48:40,593 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 02:48:40,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:48:40,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583131430] [2023-01-28 02:48:40,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583131430] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:48:40,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761959561] [2023-01-28 02:48:40,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 02:48:40,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:48:40,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:48:40,595 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 02:48:40,597 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 02:48:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:48:40,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 43 conjunts are in the unsatisfiable core [2023-01-28 02:48:40,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:48:41,083 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 149 treesize of output 97 [2023-01-28 02:48:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:48:41,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:48:41,760 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:48:41,760 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 100 treesize of output 60 [2023-01-28 02:48:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:48:42,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761959561] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:48:42,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:48:42,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 31 [2023-01-28 02:48:42,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950608553] [2023-01-28 02:48:42,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:48:42,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 02:48:42,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:48:42,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 02:48:42,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2023-01-28 02:48:42,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 771 [2023-01-28 02:48:42,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 2136 transitions, 28870 flow. Second operand has 32 states, 32 states have (on average 224.1875) internal successors, (7174), 32 states have internal predecessors, (7174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:48:42,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:48:42,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 771 [2023-01-28 02:48:42,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:49:36,970 INFO L130 PetriNetUnfolder]: 62594/106641 cut-off events. [2023-01-28 02:49:36,970 INFO L131 PetriNetUnfolder]: For 1896930/1896930 co-relation queries the response was YES. [2023-01-28 02:49:41,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750455 conditions, 106641 events. 62594/106641 cut-off events. For 1896930/1896930 co-relation queries the response was YES. Maximal size of possible extension queue 5635. Compared 1058101 event pairs, 5673 based on Foata normal form. 22/93785 useless extension candidates. Maximal degree in co-relation 749780. Up to 23981 conditions per place. [2023-01-28 02:49:41,716 INFO L137 encePairwiseOnDemand]: 756/771 looper letters, 4126 selfloop transitions, 3078 changer transitions 130/7334 dead transitions. [2023-01-28 02:49:41,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 7334 transitions, 107827 flow [2023-01-28 02:49:41,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-01-28 02:49:41,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2023-01-28 02:49:41,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 27246 transitions. [2023-01-28 02:49:41,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29696236471242193 [2023-01-28 02:49:41,734 INFO L72 ComplementDD]: Start complementDD. Operand 119 states and 27246 transitions. [2023-01-28 02:49:41,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 119 states and 27246 transitions. [2023-01-28 02:49:41,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:49:41,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 119 states and 27246 transitions. [2023-01-28 02:49:41,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 120 states, 119 states have (on average 228.9579831932773) internal successors, (27246), 119 states have internal predecessors, (27246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:49:41,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 120 states, 120 states have (on average 771.0) internal successors, (92520), 120 states have internal predecessors, (92520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:49:41,814 INFO L81 ComplementDD]: Finished complementDD. Result has 120 states, 120 states have (on average 771.0) internal successors, (92520), 120 states have internal predecessors, (92520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:49:41,814 INFO L175 Difference]: Start difference. First operand has 472 places, 2136 transitions, 28870 flow. Second operand 119 states and 27246 transitions. [2023-01-28 02:49:41,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 7334 transitions, 107827 flow [2023-01-28 02:50:57,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 7334 transitions, 107182 flow, removed 199 selfloop flow, removed 6 redundant places. [2023-01-28 02:50:57,694 INFO L231 Difference]: Finished difference. Result has 642 places, 4623 transitions, 73509 flow [2023-01-28 02:50:57,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=771, PETRI_DIFFERENCE_MINUEND_FLOW=28625, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=816, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=119, PETRI_FLOW=73509, PETRI_PLACES=642, PETRI_TRANSITIONS=4623} [2023-01-28 02:50:57,696 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 612 predicate places. [2023-01-28 02:50:57,696 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 4623 transitions, 73509 flow [2023-01-28 02:50:57,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 224.1875) internal successors, (7174), 32 states have internal predecessors, (7174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:50:57,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 02:50:57,697 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 02:50:57,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-01-28 02:50:57,902 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,SelfDestructingSolverStorable10 [2023-01-28 02:50:57,902 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 02:50:57,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 02:50:57,903 INFO L85 PathProgramCache]: Analyzing trace with hash -770250497, now seen corresponding path program 8 times [2023-01-28 02:50:57,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 02:50:57,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223076704] [2023-01-28 02:50:57,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 02:50:57,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 02:50:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 02:50:58,802 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 02:50:58,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 02:50:58,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223076704] [2023-01-28 02:50:58,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223076704] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 02:50:58,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222563486] [2023-01-28 02:50:58,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 02:50:58,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 02:50:58,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 02:50:58,803 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 02:50:58,805 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 02:50:58,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 02:50:58,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 02:50:58,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-28 02:50:58,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 02:50:59,545 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 187 treesize of output 127 [2023-01-28 02:50:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:50:59,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 02:51:00,836 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 02:51:00,837 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 180 treesize of output 108 [2023-01-28 02:51:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 02:51:00,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222563486] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 02:51:00,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 02:51:00,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 33 [2023-01-28 02:51:00,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716641667] [2023-01-28 02:51:00,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 02:51:00,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 02:51:00,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 02:51:00,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 02:51:00,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2023-01-28 02:51:01,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 771 [2023-01-28 02:51:01,015 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 4623 transitions, 73509 flow. Second operand has 34 states, 34 states have (on average 228.02941176470588) internal successors, (7753), 34 states have internal predecessors, (7753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:51:01,015 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 02:51:01,015 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 771 [2023-01-28 02:51:01,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 02:52:49,871 INFO L130 PetriNetUnfolder]: 75073/128847 cut-off events. [2023-01-28 02:52:49,871 INFO L131 PetriNetUnfolder]: For 3085068/3085068 co-relation queries the response was YES. [2023-01-28 02:52:57,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1050012 conditions, 128847 events. 75073/128847 cut-off events. For 3085068/3085068 co-relation queries the response was YES. Maximal size of possible extension queue 6847. Compared 1313627 event pairs, 13614 based on Foata normal form. 12/116019 useless extension candidates. Maximal degree in co-relation 1049762. Up to 53866 conditions per place. [2023-01-28 02:52:58,174 INFO L137 encePairwiseOnDemand]: 759/771 looper letters, 4217 selfloop transitions, 2004 changer transitions 21/6242 dead transitions. [2023-01-28 02:52:58,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 649 places, 6242 transitions, 117777 flow [2023-01-28 02:52:58,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 02:52:58,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 02:52:58,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 5408 transitions. [2023-01-28 02:52:58,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30496813849884397 [2023-01-28 02:52:58,206 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 5408 transitions. [2023-01-28 02:52:58,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 5408 transitions. [2023-01-28 02:52:58,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 02:52:58,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 5408 transitions. [2023-01-28 02:52:58,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 235.1304347826087) internal successors, (5408), 23 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:52:58,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 771.0) internal successors, (18504), 24 states have internal predecessors, (18504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:52:58,219 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 771.0) internal successors, (18504), 24 states have internal predecessors, (18504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 02:52:58,219 INFO L175 Difference]: Start difference. First operand has 642 places, 4623 transitions, 73509 flow. Second operand 23 states and 5408 transitions. [2023-01-28 02:52:58,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 649 places, 6242 transitions, 117777 flow Received shutdown request... [2023-01-28 02:59:20,644 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 02:59:20,653 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 02:59:21,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-01-28 02:59:21,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown