/usr/bin/java -Xmx8000000000 -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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_unsafe-10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 20:07:34,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 20:07:34,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 20:07:34,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 20:07:34,561 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 20:07:34,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 20:07:34,566 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 20:07:34,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 20:07:34,574 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 20:07:34,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 20:07:34,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 20:07:34,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 20:07:34,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 20:07:34,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 20:07:34,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 20:07:34,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 20:07:34,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 20:07:34,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 20:07:34,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 20:07:34,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 20:07:34,597 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 20:07:34,598 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 20:07:34,598 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 20:07:34,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 20:07:34,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 20:07:34,605 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 20:07:34,606 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 20:07:34,607 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 20:07:34,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 20:07:34,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 20:07:34,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 20:07:34,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 20:07:34,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 20:07:34,612 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 20:07:34,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 20:07:34,613 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 20:07:34,613 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 20:07:34,614 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 20:07:34,614 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 20:07:34,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 20:07:34,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 20:07:34,616 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-SemanticLbe.epf [2022-12-05 20:07:34,665 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 20:07:34,666 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 20:07:34,667 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 20:07:34,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 20:07:34,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 20:07:34,668 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 20:07:34,668 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 20:07:34,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 20:07:34,669 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 20:07:34,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 20:07:34,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 20:07:34,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 20:07:34,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 20:07:34,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 20:07:34,670 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 20:07:34,670 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 20:07:34,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 20:07:34,671 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 20:07:34,671 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 20:07:34,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 20:07:34,671 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 20:07:34,671 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 20:07:34,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 20:07:34,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 20:07:34,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 20:07:34,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 20:07:34,672 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 20:07:34,672 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 20:07:34,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 20:07:34,672 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 20:07:34,672 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 20:07:34,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 20:07:34,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 20:07:34,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 20:07:34,988 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 20:07:34,988 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 20:07:34,989 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-10.i [2022-12-05 20:07:36,046 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 20:07:36,314 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 20:07:36,315 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-10.i [2022-12-05 20:07:36,328 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2b55330b/a55b27aa1a714ed68219c9c57e5dd937/FLAG495cbef90 [2022-12-05 20:07:36,340 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2b55330b/a55b27aa1a714ed68219c9c57e5dd937 [2022-12-05 20:07:36,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 20:07:36,344 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 20:07:36,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 20:07:36,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 20:07:36,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 20:07:36,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17985569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36, skipping insertion in model container [2022-12-05 20:07:36,350 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 20:07:36,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 20:07:36,676 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-10.i[30243,30256] [2022-12-05 20:07:36,685 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:07:36,686 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:07:36,690 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:07:36,691 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:07:36,695 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:07:36,696 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:07:36,696 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:07:36,696 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:07:36,700 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:07:36,702 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:07:36,703 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 20:07:36,712 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 20:07:36,750 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-10.i[30243,30256] [2022-12-05 20:07:36,751 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:07:36,751 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:07:36,752 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:07:36,752 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:07:36,754 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:07:36,755 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:07:36,755 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:07:36,755 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:07:36,756 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-05 20:07:36,757 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-05 20:07:36,757 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 20:07:36,793 INFO L208 MainTranslator]: Completed translation [2022-12-05 20:07:36,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36 WrapperNode [2022-12-05 20:07:36,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 20:07:36,795 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 20:07:36,795 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 20:07:36,795 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 20:07:36,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,829 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,858 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-05 20:07:36,858 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 20:07:36,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 20:07:36,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 20:07:36,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 20:07:36,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,895 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 20:07:36,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 20:07:36,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 20:07:36,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 20:07:36,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (1/1) ... [2022-12-05 20:07:36,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 20:07:36,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:07:36,931 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) [2022-12-05 20:07:36,953 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 [2022-12-05 20:07:36,973 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-05 20:07:36,974 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-05 20:07:36,974 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-05 20:07:36,974 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-05 20:07:36,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 20:07:36,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-05 20:07:36,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 20:07:36,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 20:07:36,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 20:07:36,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 20:07:36,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-05 20:07:36,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 20:07:36,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 20:07:36,976 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 20:07:37,134 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 20:07:37,136 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 20:07:37,328 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 20:07:37,334 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 20:07:37,334 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-05 20:07:37,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 08:07:37 BoogieIcfgContainer [2022-12-05 20:07:37,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 20:07:37,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 20:07:37,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 20:07:37,341 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 20:07:37,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 08:07:36" (1/3) ... [2022-12-05 20:07:37,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@687b65bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 08:07:37, skipping insertion in model container [2022-12-05 20:07:37,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:07:36" (2/3) ... [2022-12-05 20:07:37,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@687b65bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 08:07:37, skipping insertion in model container [2022-12-05 20:07:37,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 08:07:37" (3/3) ... [2022-12-05 20:07:37,344 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-10.i [2022-12-05 20:07:37,360 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 20:07:37,360 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 20:07:37,360 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 20:07:37,417 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-05 20:07:37,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 93 transitions, 196 flow [2022-12-05 20:07:37,508 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-12-05 20:07:37,509 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-05 20:07:37,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 91 events. 7/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 65. Up to 2 conditions per place. [2022-12-05 20:07:37,516 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 93 transitions, 196 flow [2022-12-05 20:07:37,521 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 91 transitions, 188 flow [2022-12-05 20:07:37,523 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 20:07:37,552 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 91 transitions, 188 flow [2022-12-05 20:07:37,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 91 transitions, 188 flow [2022-12-05 20:07:37,593 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-12-05 20:07:37,593 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-05 20:07:37,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 91 events. 7/91 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 65. Up to 2 conditions per place. [2022-12-05 20:07:37,597 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 91 transitions, 188 flow [2022-12-05 20:07:37,597 INFO L188 LiptonReduction]: Number of co-enabled transitions 1914 [2022-12-05 20:07:41,182 INFO L203 LiptonReduction]: Total number of compositions: 77 [2022-12-05 20:07:41,194 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 20:07:41,201 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;@738be4e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 20:07:41,201 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-05 20:07:41,205 INFO L130 PetriNetUnfolder]: 3/12 cut-off events. [2022-12-05 20:07:41,206 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-05 20:07:41,206 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:07:41,207 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-05 20:07:41,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:07:41,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:07:41,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1750465324, now seen corresponding path program 1 times [2022-12-05 20:07:41,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:07:41,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166696207] [2022-12-05 20:07:41,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:07:41,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:07:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:07:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:41,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:07:41,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166696207] [2022-12-05 20:07:41,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166696207] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 20:07:41,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 20:07:41,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-05 20:07:41,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606744532] [2022-12-05 20:07:41,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 20:07:41,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 20:07:41,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:07:41,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 20:07:41,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 20:07:41,498 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 14 [2022-12-05 20:07:41,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:07:41,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:07:41,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 14 [2022-12-05 20:07:41,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:07:41,576 INFO L130 PetriNetUnfolder]: 97/149 cut-off events. [2022-12-05 20:07:41,576 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 20:07:41,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 149 events. 97/149 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 331 event pairs, 20 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 300. Up to 91 conditions per place. [2022-12-05 20:07:41,579 INFO L137 encePairwiseOnDemand]: 10/14 looper letters, 18 selfloop transitions, 2 changer transitions 1/21 dead transitions. [2022-12-05 20:07:41,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 90 flow [2022-12-05 20:07:41,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 20:07:41,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 20:07:41,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 23 transitions. [2022-12-05 20:07:41,590 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2022-12-05 20:07:41,591 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 3 states and 23 transitions. [2022-12-05 20:07:41,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 90 flow [2022-12-05 20:07:41,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-05 20:07:41,597 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 42 flow [2022-12-05 20:07:41,599 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2022-12-05 20:07:41,602 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2022-12-05 20:07:41,603 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 42 flow [2022-12-05 20:07:41,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:07:41,603 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:07:41,603 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:07:41,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 20:07:41,604 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:07:41,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:07:41,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1570150653, now seen corresponding path program 1 times [2022-12-05 20:07:41,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:07:41,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256679814] [2022-12-05 20:07:41,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:07:41,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:07:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:07:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:41,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:07:41,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256679814] [2022-12-05 20:07:41,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256679814] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:07:41,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699645786] [2022-12-05 20:07:41,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:07:41,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:07:41,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:07:41,747 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) [2022-12-05 20:07:41,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-05 20:07:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:07:41,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-05 20:07:41,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:07:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:41,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:07:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:41,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699645786] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:07:41,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:07:41,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-05 20:07:41,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681794155] [2022-12-05 20:07:41,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:07:41,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 20:07:41,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:07:41,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 20:07:41,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-05 20:07:41,874 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 14 [2022-12-05 20:07:41,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 42 flow. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:07:41,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:07:41,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 14 [2022-12-05 20:07:41,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:07:41,943 INFO L130 PetriNetUnfolder]: 133/203 cut-off events. [2022-12-05 20:07:41,943 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-05 20:07:41,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 203 events. 133/203 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 443 event pairs, 20 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 471. Up to 64 conditions per place. [2022-12-05 20:07:41,945 INFO L137 encePairwiseOnDemand]: 11/14 looper letters, 36 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2022-12-05 20:07:41,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 41 transitions, 184 flow [2022-12-05 20:07:41,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 20:07:41,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 20:07:41,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 44 transitions. [2022-12-05 20:07:41,947 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2022-12-05 20:07:41,947 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 42 flow. Second operand 6 states and 44 transitions. [2022-12-05 20:07:41,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 41 transitions, 184 flow [2022-12-05 20:07:41,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 20:07:41,948 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 76 flow [2022-12-05 20:07:41,948 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=76, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2022-12-05 20:07:41,949 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 7 predicate places. [2022-12-05 20:07:41,949 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 76 flow [2022-12-05 20:07:41,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:07:41,949 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:07:41,949 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-05 20:07:41,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-05 20:07:42,155 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 [2022-12-05 20:07:42,156 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:07:42,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:07:42,157 INFO L85 PathProgramCache]: Analyzing trace with hash 129874156, now seen corresponding path program 2 times [2022-12-05 20:07:42,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:07:42,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276668891] [2022-12-05 20:07:42,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:07:42,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:07:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:07:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:42,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:07:42,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276668891] [2022-12-05 20:07:42,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276668891] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:07:42,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569720741] [2022-12-05 20:07:42,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 20:07:42,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:07:42,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:07:42,307 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) [2022-12-05 20:07:42,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-05 20:07:42,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 20:07:42,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:07:42,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 20:07:42,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:07:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:42,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:07:42,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:42,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569720741] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:07:42,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:07:42,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-05 20:07:42,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800201686] [2022-12-05 20:07:42,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:07:42,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-05 20:07:42,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:07:42,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-05 20:07:42,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-05 20:07:42,491 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 14 [2022-12-05 20:07:42,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 76 flow. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:07:42,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:07:42,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 14 [2022-12-05 20:07:42,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:07:42,664 INFO L130 PetriNetUnfolder]: 241/365 cut-off events. [2022-12-05 20:07:42,664 INFO L131 PetriNetUnfolder]: For 207/207 co-relation queries the response was YES. [2022-12-05 20:07:42,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 365 events. 241/365 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 843 event pairs, 20 based on Foata normal form. 54/339 useless extension candidates. Maximal degree in co-relation 993. Up to 109 conditions per place. [2022-12-05 20:07:42,674 INFO L137 encePairwiseOnDemand]: 11/14 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2022-12-05 20:07:42,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 83 transitions, 398 flow [2022-12-05 20:07:42,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-05 20:07:42,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-05 20:07:42,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 89 transitions. [2022-12-05 20:07:42,677 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2022-12-05 20:07:42,677 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 76 flow. Second operand 12 states and 89 transitions. [2022-12-05 20:07:42,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 83 transitions, 398 flow [2022-12-05 20:07:42,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 83 transitions, 384 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-05 20:07:42,684 INFO L231 Difference]: Finished difference. Result has 41 places, 23 transitions, 146 flow [2022-12-05 20:07:42,684 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=146, PETRI_PLACES=41, PETRI_TRANSITIONS=23} [2022-12-05 20:07:42,685 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 23 predicate places. [2022-12-05 20:07:42,685 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions, 146 flow [2022-12-05 20:07:42,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:07:42,685 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:07:42,685 INFO L213 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-05 20:07:42,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-05 20:07:42,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-05 20:07:42,891 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:07:42,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:07:42,891 INFO L85 PathProgramCache]: Analyzing trace with hash -339398260, now seen corresponding path program 3 times [2022-12-05 20:07:42,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:07:42,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576976385] [2022-12-05 20:07:42,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:07:42,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:07:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:07:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:43,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:07:43,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576976385] [2022-12-05 20:07:43,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576976385] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:07:43,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776096554] [2022-12-05 20:07:43,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 20:07:43,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:07:43,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:07:43,143 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) [2022-12-05 20:07:43,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-05 20:07:43,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-05 20:07:43,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:07:43,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-05 20:07:43,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:07:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:43,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:07:43,444 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:43,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776096554] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:07:43,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:07:43,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-05 20:07:43,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382827218] [2022-12-05 20:07:43,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:07:43,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-05 20:07:43,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:07:43,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-05 20:07:43,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-12-05 20:07:43,451 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 14 [2022-12-05 20:07:43,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 23 transitions, 146 flow. Second operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:07:43,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:07:43,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 14 [2022-12-05 20:07:43,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:07:43,719 INFO L130 PetriNetUnfolder]: 457/689 cut-off events. [2022-12-05 20:07:43,719 INFO L131 PetriNetUnfolder]: For 4203/4203 co-relation queries the response was YES. [2022-12-05 20:07:43,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2140 conditions, 689 events. 457/689 cut-off events. For 4203/4203 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1640 event pairs, 20 based on Foata normal form. 108/645 useless extension candidates. Maximal degree in co-relation 2118. Up to 190 conditions per place. [2022-12-05 20:07:43,724 INFO L137 encePairwiseOnDemand]: 11/14 looper letters, 144 selfloop transitions, 23 changer transitions 0/167 dead transitions. [2022-12-05 20:07:43,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 167 transitions, 840 flow [2022-12-05 20:07:43,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-05 20:07:43,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-05 20:07:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 179 transitions. [2022-12-05 20:07:43,727 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5327380952380952 [2022-12-05 20:07:43,727 INFO L175 Difference]: Start difference. First operand has 41 places, 23 transitions, 146 flow. Second operand 24 states and 179 transitions. [2022-12-05 20:07:43,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 167 transitions, 840 flow [2022-12-05 20:07:43,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 167 transitions, 768 flow, removed 31 selfloop flow, removed 5 redundant places. [2022-12-05 20:07:43,734 INFO L231 Difference]: Finished difference. Result has 71 places, 35 transitions, 266 flow [2022-12-05 20:07:43,734 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=266, PETRI_PLACES=71, PETRI_TRANSITIONS=35} [2022-12-05 20:07:43,735 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 53 predicate places. [2022-12-05 20:07:43,735 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 35 transitions, 266 flow [2022-12-05 20:07:43,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:07:43,735 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:07:43,735 INFO L213 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-12-05 20:07:43,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-05 20:07:43,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:07:43,942 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:07:43,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:07:43,942 INFO L85 PathProgramCache]: Analyzing trace with hash -122733876, now seen corresponding path program 4 times [2022-12-05 20:07:43,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:07:43,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675373344] [2022-12-05 20:07:43,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:07:43,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:07:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:07:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:45,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:07:45,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675373344] [2022-12-05 20:07:45,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675373344] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:07:45,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297608169] [2022-12-05 20:07:45,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 20:07:45,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:07:45,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:07:45,210 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) [2022-12-05 20:07:45,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-05 20:07:45,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 20:07:45,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 20:07:45,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 74 conjunts are in the unsatisfiable core [2022-12-05 20:07:45,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:07:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 210 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:46,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:07:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:07:47,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297608169] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:07:47,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:07:47,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2022-12-05 20:07:47,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972522823] [2022-12-05 20:07:47,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:07:47,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-05 20:07:47,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:07:47,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-05 20:07:47,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=895, Invalid=4075, Unknown=0, NotChecked=0, Total=4970 [2022-12-05 20:07:47,619 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 14 [2022-12-05 20:07:47,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 35 transitions, 266 flow. Second operand has 71 states, 70 states have (on average 1.2) internal successors, (84), 70 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:07:47,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:07:47,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 14 [2022-12-05 20:07:47,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 20:08:26,338 INFO L130 PetriNetUnfolder]: 68227/102358 cut-off events. [2022-12-05 20:08:26,339 INFO L131 PetriNetUnfolder]: For 592964/592964 co-relation queries the response was YES. [2022-12-05 20:08:26,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359372 conditions, 102358 events. 68227/102358 cut-off events. For 592964/592964 co-relation queries the response was YES. Maximal size of possible extension queue 2137. Compared 749772 event pairs, 101 based on Foata normal form. 193/76985 useless extension candidates. Maximal degree in co-relation 359338. Up to 26911 conditions per place. [2022-12-05 20:08:27,465 INFO L137 encePairwiseOnDemand]: 9/14 looper letters, 1504 selfloop transitions, 4581 changer transitions 0/6085 dead transitions. [2022-12-05 20:08:27,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 6085 transitions, 62731 flow [2022-12-05 20:08:27,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 301 states. [2022-12-05 20:08:27,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2022-12-05 20:08:27,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 2405 transitions. [2022-12-05 20:08:27,482 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5707166587565259 [2022-12-05 20:08:27,482 INFO L175 Difference]: Start difference. First operand has 71 places, 35 transitions, 266 flow. Second operand 301 states and 2405 transitions. [2022-12-05 20:08:27,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 6085 transitions, 62731 flow [2022-12-05 20:08:31,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 6085 transitions, 43361 flow, removed 8787 selfloop flow, removed 11 redundant places. [2022-12-05 20:08:31,941 INFO L231 Difference]: Finished difference. Result has 386 places, 4616 transitions, 27823 flow [2022-12-05 20:08:31,942 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=14, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=301, PETRI_FLOW=27823, PETRI_PLACES=386, PETRI_TRANSITIONS=4616} [2022-12-05 20:08:31,942 INFO L294 CegarLoopForPetriNet]: 18 programPoint places, 368 predicate places. [2022-12-05 20:08:31,943 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 4616 transitions, 27823 flow [2022-12-05 20:08:31,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.2) internal successors, (84), 70 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:08:31,943 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 20:08:31,943 INFO L213 CegarLoopForPetriNet]: trace histogram [22, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 20:08:31,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-05 20:08:32,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:08:32,152 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 20:08:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 20:08:32,152 INFO L85 PathProgramCache]: Analyzing trace with hash 246700207, now seen corresponding path program 1 times [2022-12-05 20:08:32,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 20:08:32,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201032260] [2022-12-05 20:08:32,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:08:32,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 20:08:32,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:08:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:08:33,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 20:08:33,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201032260] [2022-12-05 20:08:33,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201032260] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 20:08:33,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661932181] [2022-12-05 20:08:33,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 20:08:33,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 20:08:33,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 20:08:33,325 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) [2022-12-05 20:08:33,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-05 20:08:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 20:08:33,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-05 20:08:33,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 20:08:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 172 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:08:34,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 20:08:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 20:08:35,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661932181] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 20:08:35,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 20:08:35,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2022-12-05 20:08:35,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025162532] [2022-12-05 20:08:35,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 20:08:35,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-05 20:08:35,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 20:08:35,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-05 20:08:35,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=936, Invalid=4916, Unknown=0, NotChecked=0, Total=5852 [2022-12-05 20:08:35,881 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 14 [2022-12-05 20:08:35,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 4616 transitions, 27823 flow. Second operand has 77 states, 76 states have (on average 1.2236842105263157) internal successors, (93), 76 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 20:08:35,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 20:08:35,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 14 [2022-12-05 20:08:35,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand