/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 --traceabstraction.use.on-demand.petri.net.difference true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_unsafe-7.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 18:16:26,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 18:16:26,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 18:16:26,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 18:16:26,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 18:16:26,754 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 18:16:26,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 18:16:26,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 18:16:26,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 18:16:26,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 18:16:26,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 18:16:26,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 18:16:26,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 18:16:26,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 18:16:26,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 18:16:26,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 18:16:26,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 18:16:26,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 18:16:26,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 18:16:26,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 18:16:26,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 18:16:26,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 18:16:26,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 18:16:26,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 18:16:26,788 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 18:16:26,789 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 18:16:26,789 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 18:16:26,790 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 18:16:26,790 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 18:16:26,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 18:16:26,791 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 18:16:26,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 18:16:26,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 18:16:26,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 18:16:26,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 18:16:26,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 18:16:26,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 18:16:26,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 18:16:26,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 18:16:26,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 18:16:26,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 18:16:26,796 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 [2022-12-12 18:16:26,820 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 18:16:26,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 18:16:26,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 18:16:26,822 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 18:16:26,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 18:16:26,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 18:16:26,823 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 18:16:26,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 18:16:26,824 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 18:16:26,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 18:16:26,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 18:16:26,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 18:16:26,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 18:16:26,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 18:16:26,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 18:16:26,825 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 18:16:26,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 18:16:26,825 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 18:16:26,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 18:16:26,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 18:16:26,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 18:16:26,826 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 18:16:26,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 18:16:26,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 18:16:26,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 18:16:26,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 18:16:26,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 18:16:26,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 18:16:26,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 18:16:26,827 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 18:16:26,827 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true [2022-12-12 18:16:27,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 18:16:27,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 18:16:27,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 18:16:27,124 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 18:16:27,124 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 18:16:27,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-7.i [2022-12-12 18:16:28,465 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 18:16:28,845 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 18:16:28,851 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-7.i [2022-12-12 18:16:28,871 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aa114c69/8728e7b31f0c48a6a5cbfd157c2a2c1c/FLAG44b89ab4a [2022-12-12 18:16:28,893 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aa114c69/8728e7b31f0c48a6a5cbfd157c2a2c1c [2022-12-12 18:16:28,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 18:16:28,897 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 18:16:28,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 18:16:28,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 18:16:28,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 18:16:28,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 06:16:28" (1/1) ... [2022-12-12 18:16:28,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fafe908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 06:16:28, skipping insertion in model container [2022-12-12 18:16:28,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 06:16:28" (1/1) ... [2022-12-12 18:16:28,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 18:16:28,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 18:16:29,305 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-7.i[30243,30256] [2022-12-12 18:16:29,312 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 18:16:29,313 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 18:16:29,329 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 18:16:29,330 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 18:16:29,333 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 18:16:29,333 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 18:16:29,333 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 18:16:29,334 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 18:16:29,337 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 18:16:29,339 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 18:16:29,340 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 18:16:29,347 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 18:16:29,398 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-7.i[30243,30256] [2022-12-12 18:16:29,399 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 18:16:29,399 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 18:16:29,400 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 18:16:29,400 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 18:16:29,402 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 18:16:29,402 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 18:16:29,402 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 18:16:29,402 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 18:16:29,405 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-12 18:16:29,406 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-12 18:16:29,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 18:16:29,437 INFO L208 MainTranslator]: Completed translation [2022-12-12 18:16:29,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 06:16:29 WrapperNode [2022-12-12 18:16:29,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 18:16:29,439 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 18:16:29,439 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 18:16:29,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 18:16:29,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 06:16:29" (1/1) ... [2022-12-12 18:16:29,483 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 06:16:29" (1/1) ... [2022-12-12 18:16:29,518 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-12 18:16:29,519 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 18:16:29,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 18:16:29,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 18:16:29,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 18:16:29,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 06:16:29" (1/1) ... [2022-12-12 18:16:29,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 06:16:29" (1/1) ... [2022-12-12 18:16:29,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 06:16:29" (1/1) ... [2022-12-12 18:16:29,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 06:16:29" (1/1) ... [2022-12-12 18:16:29,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 06:16:29" (1/1) ... [2022-12-12 18:16:29,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 06:16:29" (1/1) ... [2022-12-12 18:16:29,568 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 06:16:29" (1/1) ... [2022-12-12 18:16:29,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 06:16:29" (1/1) ... [2022-12-12 18:16:29,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 18:16:29,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 18:16:29,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 18:16:29,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 18:16:29,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 06:16:29" (1/1) ... [2022-12-12 18:16:29,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 18:16:29,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 18:16:29,649 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) [2022-12-12 18:16:29,690 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 [2022-12-12 18:16:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-12 18:16:29,722 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-12 18:16:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-12 18:16:29,722 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-12 18:16:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 18:16:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-12 18:16:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 18:16:29,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 18:16:29,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 18:16:29,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 18:16:29,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-12 18:16:29,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 18:16:29,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 18:16:29,724 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 18:16:29,916 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 18:16:29,918 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 18:16:30,136 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 18:16:30,141 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 18:16:30,141 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-12 18:16:30,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 06:16:30 BoogieIcfgContainer [2022-12-12 18:16:30,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 18:16:30,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 18:16:30,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 18:16:30,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 18:16:30,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 06:16:28" (1/3) ... [2022-12-12 18:16:30,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4661c0a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 06:16:30, skipping insertion in model container [2022-12-12 18:16:30,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 06:16:29" (2/3) ... [2022-12-12 18:16:30,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4661c0a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 06:16:30, skipping insertion in model container [2022-12-12 18:16:30,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 06:16:30" (3/3) ... [2022-12-12 18:16:30,166 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-7.i [2022-12-12 18:16:30,181 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 18:16:30,181 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 18:16:30,192 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 18:16:30,274 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-12 18:16:30,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 93 transitions, 196 flow [2022-12-12 18:16:30,399 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-12-12 18:16:30,399 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-12 18:16:30,403 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. [2022-12-12 18:16:30,404 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 93 transitions, 196 flow [2022-12-12 18:16:30,406 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 91 transitions, 188 flow [2022-12-12 18:16:30,416 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 18:16:30,446 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 91 transitions, 188 flow [2022-12-12 18:16:30,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 91 transitions, 188 flow [2022-12-12 18:16:30,507 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-12-12 18:16:30,508 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-12 18:16:30,509 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. [2022-12-12 18:16:30,510 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 91 transitions, 188 flow [2022-12-12 18:16:30,511 INFO L226 LiptonReduction]: Number of co-enabled transitions 1914 [2022-12-12 18:16:34,782 INFO L241 LiptonReduction]: Total number of compositions: 79 [2022-12-12 18:16:34,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 18:16:34,798 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;@6af75cdf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 18:16:34,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-12 18:16:34,801 INFO L130 PetriNetUnfolder]: 3/26 cut-off events. [2022-12-12 18:16:34,801 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-12 18:16:34,801 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 18:16:34,802 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-12 18:16:34,802 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 18:16:34,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 18:16:34,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1807783243, now seen corresponding path program 1 times [2022-12-12 18:16:34,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 18:16:34,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482417529] [2022-12-12 18:16:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 18:16:34,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 18:16:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 18:16:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 18:16:35,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 18:16:35,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482417529] [2022-12-12 18:16:35,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482417529] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 18:16:35,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 18:16:35,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-12 18:16:35,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91688394] [2022-12-12 18:16:35,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 18:16:35,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 18:16:35,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 18:16:35,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 18:16:35,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 18:16:35,057 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-12 18:16:35,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2022-12-12 18:16:35,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 18:16:35,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-12 18:16:35,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 18:16:35,199 INFO L130 PetriNetUnfolder]: 657/1007 cut-off events. [2022-12-12 18:16:35,199 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-12 18:16:35,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2023 conditions, 1007 events. 657/1007 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4231 event pairs, 175 based on Foata normal form. 0/387 useless extension candidates. Maximal degree in co-relation 2013. Up to 641 conditions per place. [2022-12-12 18:16:35,209 INFO L137 encePairwiseOnDemand]: 24/28 looper letters, 38 selfloop transitions, 2 changer transitions 1/45 dead transitions. [2022-12-12 18:16:35,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 45 transitions, 178 flow [2022-12-12 18:16:35,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 18:16:35,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 18:16:35,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2022-12-12 18:16:35,220 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2022-12-12 18:16:35,223 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2022-12-12 18:16:35,223 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 45 transitions, 178 flow [2022-12-12 18:16:35,227 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 44 transitions, 174 flow [2022-12-12 18:16:35,228 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 44 transitions, 174 flow [2022-12-12 18:16:35,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2022-12-12 18:16:35,229 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 18:16:35,229 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-12 18:16:35,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 18:16:35,229 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 18:16:35,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 18:16:35,231 INFO L85 PathProgramCache]: Analyzing trace with hash 206704716, now seen corresponding path program 1 times [2022-12-12 18:16:35,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 18:16:35,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922031682] [2022-12-12 18:16:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 18:16:35,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 18:16:35,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 18:16:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 18:16:35,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 18:16:35,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922031682] [2022-12-12 18:16:35,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922031682] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 18:16:35,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969819250] [2022-12-12 18:16:35,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 18:16:35,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 18:16:35,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 18:16:35,371 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) [2022-12-12 18:16:35,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 18:16:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 18:16:35,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-12 18:16:35,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 18:16:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 18:16:35,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 18:16:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 18:16:35,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969819250] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 18:16:35,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 18:16:35,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-12 18:16:35,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497999659] [2022-12-12 18:16:35,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 18:16:35,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 18:16:35,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 18:16:35,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 18:16:35,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-12 18:16:35,511 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-12 18:16:35,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 44 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 18:16:35,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 18:16:35,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-12 18:16:35,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 18:16:35,724 INFO L130 PetriNetUnfolder]: 913/1399 cut-off events. [2022-12-12 18:16:35,725 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-12 18:16:35,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4178 conditions, 1399 events. 913/1399 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5992 event pairs, 175 based on Foata normal form. 0/651 useless extension candidates. Maximal degree in co-relation 4165. Up to 1025 conditions per place. [2022-12-12 18:16:35,732 INFO L137 encePairwiseOnDemand]: 25/28 looper letters, 86 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2022-12-12 18:16:35,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 95 transitions, 560 flow [2022-12-12 18:16:35,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 18:16:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 18:16:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2022-12-12 18:16:35,738 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7023809523809523 [2022-12-12 18:16:35,739 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2022-12-12 18:16:35,739 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 95 transitions, 560 flow [2022-12-12 18:16:35,746 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 95 transitions, 560 flow [2022-12-12 18:16:35,759 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 95 transitions, 560 flow [2022-12-12 18:16:35,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 18:16:35,759 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 18:16:35,759 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-12 18:16:35,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-12 18:16:35,966 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 [2022-12-12 18:16:35,967 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 18:16:35,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 18:16:35,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1043870325, now seen corresponding path program 2 times [2022-12-12 18:16:35,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 18:16:35,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276686300] [2022-12-12 18:16:35,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 18:16:35,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 18:16:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 18:16:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 18:16:36,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 18:16:36,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276686300] [2022-12-12 18:16:36,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276686300] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 18:16:36,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58599678] [2022-12-12 18:16:36,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 18:16:36,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 18:16:36,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 18:16:36,077 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) [2022-12-12 18:16:36,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 18:16:36,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 18:16:36,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 18:16:36,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 18:16:36,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 18:16:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 18:16:36,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 18:16:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 18:16:36,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58599678] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 18:16:36,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 18:16:36,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-12 18:16:36,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653295118] [2022-12-12 18:16:36,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 18:16:36,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 18:16:36,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 18:16:36,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 18:16:36,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-12 18:16:36,241 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-12 18:16:36,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 95 transitions, 560 flow. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 18:16:36,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 18:16:36,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-12 18:16:36,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 18:16:36,548 INFO L130 PetriNetUnfolder]: 1681/2556 cut-off events. [2022-12-12 18:16:36,549 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-12 18:16:36,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10170 conditions, 2556 events. 1681/2556 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 11035 event pairs, 175 based on Foata normal form. 0/1232 useless extension candidates. Maximal degree in co-relation 10154. Up to 2177 conditions per place. [2022-12-12 18:16:36,563 INFO L137 encePairwiseOnDemand]: 25/28 looper letters, 182 selfloop transitions, 11 changer transitions 0/197 dead transitions. [2022-12-12 18:16:36,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 197 transitions, 1558 flow [2022-12-12 18:16:36,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-12 18:16:36,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-12 18:16:36,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2022-12-12 18:16:36,568 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7351190476190477 [2022-12-12 18:16:36,569 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2022-12-12 18:16:36,569 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 197 transitions, 1558 flow [2022-12-12 18:16:36,581 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 197 transitions, 1558 flow [2022-12-12 18:16:36,582 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 197 transitions, 1558 flow [2022-12-12 18:16:36,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 18:16:36,582 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 18:16:36,582 INFO L214 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-12 18:16:36,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 18:16:36,787 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 [2022-12-12 18:16:36,789 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 18:16:36,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 18:16:36,790 INFO L85 PathProgramCache]: Analyzing trace with hash 2052466155, now seen corresponding path program 3 times [2022-12-12 18:16:36,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 18:16:36,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500861457] [2022-12-12 18:16:36,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 18:16:36,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 18:16:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 18:16:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 18:16:36,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 18:16:36,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500861457] [2022-12-12 18:16:36,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500861457] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 18:16:36,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600521487] [2022-12-12 18:16:36,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 18:16:36,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 18:16:36,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 18:16:36,975 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) [2022-12-12 18:16:36,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 18:16:37,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-12 18:16:37,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 18:16:37,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-12 18:16:37,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 18:16:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 18:16:37,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 18:16:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 18:16:37,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600521487] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 18:16:37,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 18:16:37,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 18 [2022-12-12 18:16:37,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566106044] [2022-12-12 18:16:37,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 18:16:37,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 18:16:37,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 18:16:37,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 18:16:37,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-12-12 18:16:37,206 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-12 18:16:37,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 197 transitions, 1558 flow. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 18:16:37,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 18:16:37,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-12 18:16:37,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 18:16:37,612 INFO L130 PetriNetUnfolder]: 2449/3708 cut-off events. [2022-12-12 18:16:37,613 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-12 18:16:37,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18461 conditions, 3708 events. 2449/3708 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 16037 event pairs, 175 based on Foata normal form. 0/1808 useless extension candidates. Maximal degree in co-relation 18442. Up to 3329 conditions per place. [2022-12-12 18:16:37,635 INFO L137 encePairwiseOnDemand]: 25/28 looper letters, 278 selfloop transitions, 17 changer transitions 0/299 dead transitions. [2022-12-12 18:16:37,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 299 transitions, 2964 flow [2022-12-12 18:16:37,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-12 18:16:37,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-12 18:16:37,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 373 transitions. [2022-12-12 18:16:37,636 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7400793650793651 [2022-12-12 18:16:37,637 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 34 predicate places. [2022-12-12 18:16:37,637 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 299 transitions, 2964 flow [2022-12-12 18:16:37,655 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 299 transitions, 2964 flow [2022-12-12 18:16:37,655 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 299 transitions, 2964 flow [2022-12-12 18:16:37,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 18:16:37,655 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 18:16:37,656 INFO L214 CegarLoopForPetriNet]: trace histogram [16, 1, 1, 1, 1, 1, 1] [2022-12-12 18:16:37,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-12 18:16:37,861 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 [2022-12-12 18:16:37,861 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 18:16:37,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 18:16:37,861 INFO L85 PathProgramCache]: Analyzing trace with hash 186168907, now seen corresponding path program 4 times [2022-12-12 18:16:37,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 18:16:37,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270754851] [2022-12-12 18:16:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 18:16:37,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 18:16:37,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 18:16:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 18:16:38,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 18:16:38,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270754851] [2022-12-12 18:16:38,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270754851] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 18:16:38,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371302831] [2022-12-12 18:16:38,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 18:16:38,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 18:16:38,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 18:16:38,605 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) [2022-12-12 18:16:38,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 18:16:38,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 18:16:38,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 18:16:38,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-12 18:16:38,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 18:16:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 18:16:39,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 18:16:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 18:16:39,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371302831] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 18:16:39,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 18:16:39,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-12-12 18:16:39,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046242956] [2022-12-12 18:16:39,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 18:16:39,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-12 18:16:39,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 18:16:39,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-12 18:16:39,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=2248, Unknown=0, NotChecked=0, Total=2756 [2022-12-12 18:16:39,881 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-12 18:16:39,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 299 transitions, 2964 flow. Second operand has 53 states, 53 states have (on average 5.245283018867925) internal successors, (278), 53 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 18:16:39,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 18:16:39,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-12 18:16:39,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 18:17:19,957 INFO L130 PetriNetUnfolder]: 218163/342344 cut-off events. [2022-12-12 18:17:19,958 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2022-12-12 18:17:20,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1975346 conditions, 342344 events. 218163/342344 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 10439. Compared 3246642 event pairs, 280 based on Foata normal form. 0/168101 useless extension candidates. Maximal degree in co-relation 1975324. Up to 323627 conditions per place. [2022-12-12 18:17:22,107 INFO L137 encePairwiseOnDemand]: 17/28 looper letters, 13109 selfloop transitions, 14249 changer transitions 0/27362 dead transitions. [2022-12-12 18:17:22,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 27362 transitions, 328334 flow [2022-12-12 18:17:22,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-12-12 18:17:22,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2022-12-12 18:17:22,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 3771 transitions. [2022-12-12 18:17:22,133 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.783014950166113 [2022-12-12 18:17:22,134 INFO L295 CegarLoopForPetriNet]: 32 programPoint places, 205 predicate places. [2022-12-12 18:17:22,134 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 27362 transitions, 328334 flow [2022-12-12 18:17:23,838 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 27362 transitions, 328334 flow [2022-12-12 18:17:23,838 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 27362 transitions, 328334 flow [2022-12-12 18:17:23,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 5.245283018867925) internal successors, (278), 53 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 18:17:23,839 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 18:17:23,839 INFO L214 CegarLoopForPetriNet]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 18:17:23,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 18:17:24,044 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 [2022-12-12 18:17:24,044 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-12 18:17:24,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 18:17:24,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1321478059, now seen corresponding path program 1 times [2022-12-12 18:17:24,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 18:17:24,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689353924] [2022-12-12 18:17:24,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 18:17:24,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 18:17:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 18:17:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 18:17:24,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 18:17:24,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689353924] [2022-12-12 18:17:24,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689353924] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 18:17:24,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751317658] [2022-12-12 18:17:24,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 18:17:24,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 18:17:24,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 18:17:24,825 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) [2022-12-12 18:17:24,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 18:17:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 18:17:24,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-12 18:17:24,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 18:17:25,487 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 79 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 18:17:25,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 18:17:26,358 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 18:17:26,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751317658] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 18:17:26,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 18:17:26,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2022-12-12 18:17:26,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796327555] [2022-12-12 18:17:26,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 18:17:26,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-12 18:17:26,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 18:17:26,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-12 18:17:26,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=2882, Unknown=0, NotChecked=0, Total=3422 [2022-12-12 18:17:26,361 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 28 [2022-12-12 18:17:26,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 27362 transitions, 328334 flow. Second operand has 59 states, 59 states have (on average 5.271186440677966) internal successors, (311), 59 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 18:17:26,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 18:17:26,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 28 [2022-12-12 18:17:26,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand