/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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_safe-5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-11 18:41:08,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-11 18:41:08,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-11 18:41:08,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-11 18:41:08,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-11 18:41:08,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-11 18:41:08,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-11 18:41:08,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-11 18:41:08,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-11 18:41:08,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-11 18:41:08,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-11 18:41:08,640 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-11 18:41:08,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-11 18:41:08,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-11 18:41:08,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-11 18:41:08,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-11 18:41:08,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-11 18:41:08,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-11 18:41:08,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-11 18:41:08,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-11 18:41:08,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-11 18:41:08,650 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-11 18:41:08,651 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-11 18:41:08,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-11 18:41:08,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-11 18:41:08,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-11 18:41:08,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-11 18:41:08,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-11 18:41:08,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-11 18:41:08,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-11 18:41:08,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-11 18:41:08,666 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-11 18:41:08,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-11 18:41:08,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-11 18:41:08,667 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-11 18:41:08,667 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-11 18:41:08,668 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-11 18:41:08,668 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-11 18:41:08,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-11 18:41:08,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-11 18:41:08,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-11 18:41:08,673 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-NoLbe.epf [2022-12-11 18:41:08,697 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-11 18:41:08,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-11 18:41:08,699 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-11 18:41:08,699 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-11 18:41:08,700 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-11 18:41:08,700 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-11 18:41:08,700 INFO L138 SettingsManager]: * Use SBE=true [2022-12-11 18:41:08,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-11 18:41:08,700 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-11 18:41:08,701 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-11 18:41:08,701 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-11 18:41:08,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-11 18:41:08,701 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-11 18:41:08,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-11 18:41:08,702 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-11 18:41:08,702 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-11 18:41:08,702 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-11 18:41:08,702 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-11 18:41:08,702 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-11 18:41:08,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-11 18:41:08,702 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-11 18:41:08,702 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-11 18:41:08,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-11 18:41:08,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-11 18:41:08,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-11 18:41:08,703 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-11 18:41:08,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-11 18:41:08,703 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-11 18:41:08,703 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-11 18:41:08,703 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-11 18:41:08,703 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-11 18:41:08,703 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-11 18:41:08,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-11 18:41:09,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-11 18:41:09,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-11 18:41:09,022 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-11 18:41:09,022 INFO L275 PluginConnector]: CDTParser initialized [2022-12-11 18:41:09,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-5.i [2022-12-11 18:41:10,005 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-11 18:41:10,285 INFO L351 CDTParser]: Found 1 translation units. [2022-12-11 18:41:10,285 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-5.i [2022-12-11 18:41:10,309 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/411f903c9/4b96cc4d166f4d23829745ce3edd3fd4/FLAG04e0c019a [2022-12-11 18:41:10,579 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/411f903c9/4b96cc4d166f4d23829745ce3edd3fd4 [2022-12-11 18:41:10,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-11 18:41:10,581 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-11 18:41:10,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-11 18:41:10,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-11 18:41:10,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-11 18:41:10,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:10,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5416e019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10, skipping insertion in model container [2022-12-11 18:41:10,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:10,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-11 18:41:10,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-11 18:41:10,851 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_safe-5.i[30241,30254] [2022-12-11 18:41:10,860 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:41:10,861 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:41:10,863 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:41:10,863 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:41:10,867 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:41:10,867 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:41:10,867 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:41:10,867 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:41:10,870 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:41:10,871 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:41:10,873 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-11 18:41:10,880 INFO L203 MainTranslator]: Completed pre-run [2022-12-11 18:41:10,914 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_safe-5.i[30241,30254] [2022-12-11 18:41:10,915 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:41:10,916 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:41:10,916 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:41:10,916 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:41:10,918 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:41:10,918 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:41:10,918 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:41:10,918 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:41:10,919 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 18:41:10,920 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 18:41:10,920 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-11 18:41:10,949 INFO L208 MainTranslator]: Completed translation [2022-12-11 18:41:10,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10 WrapperNode [2022-12-11 18:41:10,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-11 18:41:10,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-11 18:41:10,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-11 18:41:10,952 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-11 18:41:10,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:10,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:10,997 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-11 18:41:10,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-11 18:41:10,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-11 18:41:10,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-11 18:41:10,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-11 18:41:11,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:11,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:11,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:11,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:11,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:11,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:11,024 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:11,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:11,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-11 18:41:11,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-11 18:41:11,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-11 18:41:11,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-11 18:41:11,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (1/1) ... [2022-12-11 18:41:11,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-11 18:41:11,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 18:41:11,062 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) [2022-12-11 18:41:11,071 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 [2022-12-11 18:41:11,091 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-11 18:41:11,092 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-11 18:41:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-11 18:41:11,092 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-11 18:41:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-11 18:41:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-11 18:41:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-11 18:41:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-11 18:41:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-11 18:41:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-11 18:41:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-11 18:41:11,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-11 18:41:11,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-11 18:41:11,093 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-11 18:41:11,183 INFO L236 CfgBuilder]: Building ICFG [2022-12-11 18:41:11,184 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-11 18:41:11,303 INFO L277 CfgBuilder]: Performing block encoding [2022-12-11 18:41:11,308 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-11 18:41:11,309 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-11 18:41:11,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.12 06:41:11 BoogieIcfgContainer [2022-12-11 18:41:11,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-11 18:41:11,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-11 18:41:11,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-11 18:41:11,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-11 18:41:11,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.12 06:41:10" (1/3) ... [2022-12-11 18:41:11,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f8261e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.12 06:41:11, skipping insertion in model container [2022-12-11 18:41:11,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:41:10" (2/3) ... [2022-12-11 18:41:11,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f8261e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.12 06:41:11, skipping insertion in model container [2022-12-11 18:41:11,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.12 06:41:11" (3/3) ... [2022-12-11 18:41:11,317 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-5.i [2022-12-11 18:41:11,330 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-11 18:41:11,330 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-11 18:41:11,330 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-11 18:41:11,379 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-11 18:41:11,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 93 transitions, 196 flow [2022-12-11 18:41:11,467 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-12-11 18:41:11,467 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-11 18:41:11,472 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. [2022-12-11 18:41:11,472 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 93 transitions, 196 flow [2022-12-11 18:41:11,476 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 91 transitions, 188 flow [2022-12-11 18:41:11,486 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-11 18:41:11,491 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;@7ab39b22, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-11 18:41:11,491 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-11 18:41:11,525 INFO L130 PetriNetUnfolder]: 6/81 cut-off events. [2022-12-11 18:41:11,526 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-11 18:41:11,526 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:41:11,526 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 18:41:11,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 18:41:11,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:41:11,531 INFO L85 PathProgramCache]: Analyzing trace with hash 95801150, now seen corresponding path program 1 times [2022-12-11 18:41:11,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:41:11,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286077279] [2022-12-11 18:41:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:41:11,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:41:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:41:11,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:11,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:41:11,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286077279] [2022-12-11 18:41:11,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286077279] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 18:41:11,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 18:41:11,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-11 18:41:11,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135373017] [2022-12-11 18:41:11,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 18:41:11,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-11 18:41:11,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:41:11,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-11 18:41:11,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-11 18:41:11,886 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 93 [2022-12-11 18:41:11,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 91 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 18:41:11,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:41:11,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 93 [2022-12-11 18:41:11,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:41:11,941 INFO L130 PetriNetUnfolder]: 3/92 cut-off events. [2022-12-11 18:41:11,941 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-11 18:41:11,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 92 events. 3/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 18/106 useless extension candidates. Maximal degree in co-relation 75. Up to 6 conditions per place. [2022-12-11 18:41:11,943 INFO L137 encePairwiseOnDemand]: 86/93 looper letters, 9 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2022-12-11 18:41:11,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 89 transitions, 206 flow [2022-12-11 18:41:11,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-11 18:41:11,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-11 18:41:11,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2022-12-11 18:41:11,956 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.9283154121863799 [2022-12-11 18:41:11,957 INFO L175 Difference]: Start difference. First operand has 91 places, 91 transitions, 188 flow. Second operand 3 states and 259 transitions. [2022-12-11 18:41:11,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 89 transitions, 206 flow [2022-12-11 18:41:11,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 89 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-11 18:41:11,966 INFO L231 Difference]: Finished difference. Result has 91 places, 87 transitions, 188 flow [2022-12-11 18:41:11,967 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=91, PETRI_TRANSITIONS=87} [2022-12-11 18:41:11,970 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 0 predicate places. [2022-12-11 18:41:11,970 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 87 transitions, 188 flow [2022-12-11 18:41:11,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 18:41:11,970 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:41:11,971 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 18:41:11,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-11 18:41:11,972 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 18:41:11,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:41:11,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1875915451, now seen corresponding path program 1 times [2022-12-11 18:41:11,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:41:11,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732976765] [2022-12-11 18:41:11,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:41:11,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:41:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:41:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:12,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:41:12,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732976765] [2022-12-11 18:41:12,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732976765] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 18:41:12,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606020815] [2022-12-11 18:41:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:41:12,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 18:41:12,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 18:41:12,168 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) [2022-12-11 18:41:12,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-11 18:41:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:41:12,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-11 18:41:12,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 18:41:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:12,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 18:41:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:12,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606020815] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 18:41:12,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 18:41:12,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-11 18:41:12,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672934577] [2022-12-11 18:41:12,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 18:41:12,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-11 18:41:12,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:41:12,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-11 18:41:12,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-11 18:41:12,421 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 93 [2022-12-11 18:41:12,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 87 transitions, 188 flow. Second operand has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 18:41:12,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:41:12,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 93 [2022-12-11 18:41:12,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:41:12,502 INFO L130 PetriNetUnfolder]: 3/101 cut-off events. [2022-12-11 18:41:12,502 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-11 18:41:12,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 101 events. 3/101 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 2/100 useless extension candidates. Maximal degree in co-relation 97. Up to 6 conditions per place. [2022-12-11 18:41:12,505 INFO L137 encePairwiseOnDemand]: 87/93 looper letters, 10 selfloop transitions, 9 changer transitions 0/95 dead transitions. [2022-12-11 18:41:12,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 95 transitions, 244 flow [2022-12-11 18:41:12,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-11 18:41:12,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-11 18:41:12,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 723 transitions. [2022-12-11 18:41:12,509 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8637992831541219 [2022-12-11 18:41:12,509 INFO L175 Difference]: Start difference. First operand has 91 places, 87 transitions, 188 flow. Second operand 9 states and 723 transitions. [2022-12-11 18:41:12,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 95 transitions, 244 flow [2022-12-11 18:41:12,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 95 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-11 18:41:12,512 INFO L231 Difference]: Finished difference. Result has 101 places, 93 transitions, 236 flow [2022-12-11 18:41:12,512 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=236, PETRI_PLACES=101, PETRI_TRANSITIONS=93} [2022-12-11 18:41:12,513 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 10 predicate places. [2022-12-11 18:41:12,513 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 93 transitions, 236 flow [2022-12-11 18:41:12,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 18:41:12,514 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:41:12,514 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 18:41:12,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-11 18:41:12,718 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 [2022-12-11 18:41:12,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 18:41:12,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:41:12,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1869128357, now seen corresponding path program 2 times [2022-12-11 18:41:12,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:41:12,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150996850] [2022-12-11 18:41:12,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:41:12,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:41:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:41:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:12,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:41:12,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150996850] [2022-12-11 18:41:12,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150996850] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 18:41:12,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863191163] [2022-12-11 18:41:12,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-11 18:41:12,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 18:41:12,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 18:41:12,854 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) [2022-12-11 18:41:12,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-11 18:41:12,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-11 18:41:12,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 18:41:12,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-11 18:41:12,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 18:41:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:13,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 18:41:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:13,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863191163] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 18:41:13,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 18:41:13,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-11 18:41:13,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224588040] [2022-12-11 18:41:13,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 18:41:13,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-11 18:41:13,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:41:13,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-11 18:41:13,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-12-11 18:41:13,160 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 93 [2022-12-11 18:41:13,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 93 transitions, 236 flow. Second operand has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 18:41:13,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:41:13,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 93 [2022-12-11 18:41:13,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:41:13,305 INFO L130 PetriNetUnfolder]: 3/129 cut-off events. [2022-12-11 18:41:13,305 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-11 18:41:13,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 129 events. 3/129 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 4/130 useless extension candidates. Maximal degree in co-relation 186. Up to 11 conditions per place. [2022-12-11 18:41:13,307 INFO L137 encePairwiseOnDemand]: 87/93 looper letters, 14 selfloop transitions, 21 changer transitions 0/111 dead transitions. [2022-12-11 18:41:13,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 111 transitions, 402 flow [2022-12-11 18:41:13,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-11 18:41:13,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-11 18:41:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1677 transitions. [2022-12-11 18:41:13,311 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.858678955453149 [2022-12-11 18:41:13,311 INFO L175 Difference]: Start difference. First operand has 101 places, 93 transitions, 236 flow. Second operand 21 states and 1677 transitions. [2022-12-11 18:41:13,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 111 transitions, 402 flow [2022-12-11 18:41:13,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 111 transitions, 388 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-11 18:41:13,315 INFO L231 Difference]: Finished difference. Result has 125 places, 106 transitions, 360 flow [2022-12-11 18:41:13,316 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=360, PETRI_PLACES=125, PETRI_TRANSITIONS=106} [2022-12-11 18:41:13,316 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 34 predicate places. [2022-12-11 18:41:13,317 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 106 transitions, 360 flow [2022-12-11 18:41:13,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 80.0) internal successors, (1440), 18 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 18:41:13,317 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:41:13,317 INFO L214 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 18:41:13,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-11 18:41:13,522 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 [2022-12-11 18:41:13,522 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 18:41:13,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:41:13,523 INFO L85 PathProgramCache]: Analyzing trace with hash 526543515, now seen corresponding path program 3 times [2022-12-11 18:41:13,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:41:13,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552915922] [2022-12-11 18:41:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:41:13,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:41:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:41:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:13,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:41:13,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552915922] [2022-12-11 18:41:13,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552915922] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 18:41:13,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98953705] [2022-12-11 18:41:13,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-11 18:41:13,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 18:41:13,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 18:41:13,817 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) [2022-12-11 18:41:13,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-11 18:41:13,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-11 18:41:13,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 18:41:13,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-11 18:41:13,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 18:41:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:13,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 18:41:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:14,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98953705] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 18:41:14,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 18:41:14,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 27 [2022-12-11 18:41:14,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295297223] [2022-12-11 18:41:14,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 18:41:14,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-11 18:41:14,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:41:14,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-11 18:41:14,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2022-12-11 18:41:14,166 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 93 [2022-12-11 18:41:14,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 106 transitions, 360 flow. Second operand has 27 states, 27 states have (on average 80.07407407407408) internal successors, (2162), 27 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 18:41:14,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:41:14,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 93 [2022-12-11 18:41:14,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:41:14,471 INFO L130 PetriNetUnfolder]: 3/164 cut-off events. [2022-12-11 18:41:14,471 INFO L131 PetriNetUnfolder]: For 184/184 co-relation queries the response was YES. [2022-12-11 18:41:14,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 164 events. 3/164 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 5/166 useless extension candidates. Maximal degree in co-relation 330. Up to 21 conditions per place. [2022-12-11 18:41:14,476 INFO L137 encePairwiseOnDemand]: 87/93 looper letters, 19 selfloop transitions, 36 changer transitions 0/131 dead transitions. [2022-12-11 18:41:14,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 131 transitions, 662 flow [2022-12-11 18:41:14,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-11 18:41:14,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-11 18:41:14,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2868 transitions. [2022-12-11 18:41:14,486 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8566308243727598 [2022-12-11 18:41:14,486 INFO L175 Difference]: Start difference. First operand has 125 places, 106 transitions, 360 flow. Second operand 36 states and 2868 transitions. [2022-12-11 18:41:14,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 131 transitions, 662 flow [2022-12-11 18:41:14,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 131 transitions, 628 flow, removed 11 selfloop flow, removed 6 redundant places. [2022-12-11 18:41:14,495 INFO L231 Difference]: Finished difference. Result has 160 places, 122 transitions, 548 flow [2022-12-11 18:41:14,495 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=548, PETRI_PLACES=160, PETRI_TRANSITIONS=122} [2022-12-11 18:41:14,497 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 69 predicate places. [2022-12-11 18:41:14,497 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 122 transitions, 548 flow [2022-12-11 18:41:14,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 80.07407407407408) internal successors, (2162), 27 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 18:41:14,499 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:41:14,499 INFO L214 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 18:41:14,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-11 18:41:14,706 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 [2022-12-11 18:41:14,706 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 18:41:14,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:41:14,706 INFO L85 PathProgramCache]: Analyzing trace with hash 446459774, now seen corresponding path program 4 times [2022-12-11 18:41:14,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:41:14,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185792021] [2022-12-11 18:41:14,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:41:14,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:41:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:41:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:16,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:41:16,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185792021] [2022-12-11 18:41:16,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185792021] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 18:41:16,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700601846] [2022-12-11 18:41:16,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-11 18:41:16,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 18:41:16,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 18:41:16,482 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) [2022-12-11 18:41:16,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-11 18:41:16,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-11 18:41:16,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 18:41:16,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-11 18:41:16,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 18:41:19,091 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 335 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:19,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 18:41:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:41:21,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700601846] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 18:41:21,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 18:41:21,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 127 [2022-12-11 18:41:21,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898033207] [2022-12-11 18:41:21,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 18:41:21,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-12-11 18:41:21,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:41:21,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-12-11 18:41:21,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=981, Invalid=15021, Unknown=0, NotChecked=0, Total=16002 [2022-12-11 18:41:21,821 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 93 [2022-12-11 18:41:21,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 122 transitions, 548 flow. Second operand has 127 states, 127 states have (on average 62.275590551181104) internal successors, (7909), 127 states have internal predecessors, (7909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 18:41:21,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:41:21,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 93 [2022-12-11 18:41:21,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:43:19,207 INFO L130 PetriNetUnfolder]: 24357/91555 cut-off events. [2022-12-11 18:43:19,207 INFO L131 PetriNetUnfolder]: For 15464/15464 co-relation queries the response was YES. [2022-12-11 18:43:19,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142934 conditions, 91555 events. 24357/91555 cut-off events. For 15464/15464 co-relation queries the response was YES. Maximal size of possible extension queue 1562. Compared 1284115 event pairs, 0 based on Foata normal form. 0/84146 useless extension candidates. Maximal degree in co-relation 142873. Up to 12310 conditions per place. [2022-12-11 18:43:19,967 INFO L137 encePairwiseOnDemand]: 76/93 looper letters, 1113 selfloop transitions, 1743 changer transitions 934/3878 dead transitions. [2022-12-11 18:43:19,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 960 places, 3878 transitions, 15638 flow [2022-12-11 18:43:19,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 801 states. [2022-12-11 18:43:19,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 801 states. [2022-12-11 18:43:20,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 52725 transitions. [2022-12-11 18:43:20,019 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7077846240586364 [2022-12-11 18:43:20,019 INFO L175 Difference]: Start difference. First operand has 160 places, 122 transitions, 548 flow. Second operand 801 states and 52725 transitions. [2022-12-11 18:43:20,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 960 places, 3878 transitions, 15638 flow [2022-12-11 18:43:20,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 942 places, 3878 transitions, 15588 flow, removed 7 selfloop flow, removed 18 redundant places. [2022-12-11 18:43:20,137 INFO L231 Difference]: Finished difference. Result has 1260 places, 1890 transitions, 8606 flow [2022-12-11 18:43:20,137 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=801, PETRI_FLOW=8606, PETRI_PLACES=1260, PETRI_TRANSITIONS=1890} [2022-12-11 18:43:20,139 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 1169 predicate places. [2022-12-11 18:43:20,139 INFO L495 AbstractCegarLoop]: Abstraction has has 1260 places, 1890 transitions, 8606 flow [2022-12-11 18:43:20,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 62.275590551181104) internal successors, (7909), 127 states have internal predecessors, (7909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 18:43:20,141 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:43:20,142 INFO L214 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 18:43:20,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-11 18:43:20,346 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 [2022-12-11 18:43:20,347 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-11 18:43:20,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:43:20,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1303608374, now seen corresponding path program 1 times [2022-12-11 18:43:20,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:43:20,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409239985] [2022-12-11 18:43:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:43:20,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:43:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:43:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:43:21,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:43:21,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409239985] [2022-12-11 18:43:21,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409239985] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 18:43:21,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942366201] [2022-12-11 18:43:21,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:43:21,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 18:43:21,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 18:43:21,748 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) [2022-12-11 18:43:21,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-11 18:43:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:43:21,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-11 18:43:21,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 18:43:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 325 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:43:24,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 18:43:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:43:27,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942366201] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 18:43:27,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 18:43:27,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 135 [2022-12-11 18:43:27,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99985154] [2022-12-11 18:43:27,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 18:43:27,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-12-11 18:43:27,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:43:27,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-12-11 18:43:27,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=998, Invalid=17092, Unknown=0, NotChecked=0, Total=18090 [2022-12-11 18:43:27,107 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 93 [2022-12-11 18:43:27,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1260 places, 1890 transitions, 8606 flow. Second operand has 135 states, 135 states have (on average 62.266666666666666) internal successors, (8406), 135 states have internal predecessors, (8406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 18:43:27,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:43:27,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 93 [2022-12-11 18:43:27,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand