/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 --traceabstraction.use.on-demand.petri.net.difference true --traceabstraction.size.reduction.to.apply.after.petri.net.difference REMOVE_DEAD -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_unsafe-6.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-11 23:14:43,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-11 23:14:43,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-11 23:14:43,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-11 23:14:43,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-11 23:14:43,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-11 23:14:43,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-11 23:14:43,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-11 23:14:43,636 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-11 23:14:43,637 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-11 23:14:43,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-11 23:14:43,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-11 23:14:43,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-11 23:14:43,639 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-11 23:14:43,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-11 23:14:43,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-11 23:14:43,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-11 23:14:43,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-11 23:14:43,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-11 23:14:43,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-11 23:14:43,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-11 23:14:43,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-11 23:14:43,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-11 23:14:43,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-11 23:14:43,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-11 23:14:43,664 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-11 23:14:43,664 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-11 23:14:43,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-11 23:14:43,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-11 23:14:43,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-11 23:14:43,666 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-11 23:14:43,666 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-11 23:14:43,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-11 23:14:43,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-11 23:14:43,668 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-11 23:14:43,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-11 23:14:43,668 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-11 23:14:43,668 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-11 23:14:43,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-11 23:14:43,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-11 23:14:43,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-11 23:14:43,680 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 23:14:43,702 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-11 23:14:43,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-11 23:14:43,703 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-11 23:14:43,703 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-11 23:14:43,704 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-11 23:14:43,704 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-11 23:14:43,705 INFO L138 SettingsManager]: * Use SBE=true [2022-12-11 23:14:43,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-11 23:14:43,705 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-11 23:14:43,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-11 23:14:43,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-11 23:14:43,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-11 23:14:43,706 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-11 23:14:43,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-11 23:14:43,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-11 23:14:43,706 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-11 23:14:43,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-11 23:14:43,706 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-11 23:14:43,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-11 23:14:43,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-11 23:14:43,706 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-11 23:14:43,707 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-11 23:14:43,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-11 23:14:43,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-11 23:14:43,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-11 23:14:43,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-11 23:14:43,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-11 23:14:43,707 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-11 23:14:43,707 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-11 23:14:43,707 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-11 23:14:43,708 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-11 23:14:43,708 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Size reduction to apply after Petri net difference -> REMOVE_DEAD [2022-12-11 23:14:43,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-11 23:14:43,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-11 23:14:43,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-11 23:14:43,977 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-11 23:14:43,978 INFO L275 PluginConnector]: CDTParser initialized [2022-12-11 23:14:43,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-6.i [2022-12-11 23:14:45,031 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-11 23:14:45,258 INFO L351 CDTParser]: Found 1 translation units. [2022-12-11 23:14:45,258 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-6.i [2022-12-11 23:14:45,276 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4102bc14/e03a829b688044cd95659f559d80c38f/FLAG7435ea9fe [2022-12-11 23:14:45,291 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4102bc14/e03a829b688044cd95659f559d80c38f [2022-12-11 23:14:45,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-11 23:14:45,295 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-11 23:14:45,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-11 23:14:45,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-11 23:14:45,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-11 23:14:45,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.12 11:14:45" (1/1) ... [2022-12-11 23:14:45,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d447ee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 11:14:45, skipping insertion in model container [2022-12-11 23:14:45,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.12 11:14:45" (1/1) ... [2022-12-11 23:14:45,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-11 23:14:45,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-11 23:14:45,566 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-6.i[30243,30256] [2022-12-11 23:14:45,575 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 23:14:45,576 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 23:14:45,578 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 23:14:45,579 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 23:14:45,582 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 23:14:45,582 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 23:14:45,582 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 23:14:45,582 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 23:14:45,585 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 23:14:45,586 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 23:14:45,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-11 23:14:45,594 INFO L203 MainTranslator]: Completed pre-run [2022-12-11 23:14:45,632 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-6.i[30243,30256] [2022-12-11 23:14:45,633 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 23:14:45,633 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 23:14:45,634 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 23:14:45,635 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 23:14:45,638 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 23:14:45,638 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 23:14:45,638 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 23:14:45,639 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 23:14:45,640 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-11 23:14:45,641 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-11 23:14:45,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-11 23:14:45,672 INFO L208 MainTranslator]: Completed translation [2022-12-11 23:14:45,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 11:14:45 WrapperNode [2022-12-11 23:14:45,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-11 23:14:45,674 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-11 23:14:45,674 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-11 23:14:45,675 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-11 23:14:45,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 11:14:45" (1/1) ... [2022-12-11 23:14:45,706 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 11:14:45" (1/1) ... [2022-12-11 23:14:45,720 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-11 23:14:45,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-11 23:14:45,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-11 23:14:45,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-11 23:14:45,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-11 23:14:45,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 11:14:45" (1/1) ... [2022-12-11 23:14:45,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 11:14:45" (1/1) ... [2022-12-11 23:14:45,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 11:14:45" (1/1) ... [2022-12-11 23:14:45,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 11:14:45" (1/1) ... [2022-12-11 23:14:45,742 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 11:14:45" (1/1) ... [2022-12-11 23:14:45,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 11:14:45" (1/1) ... [2022-12-11 23:14:45,745 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 11:14:45" (1/1) ... [2022-12-11 23:14:45,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 11:14:45" (1/1) ... [2022-12-11 23:14:45,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-11 23:14:45,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-11 23:14:45,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-11 23:14:45,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-11 23:14:45,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 11:14:45" (1/1) ... [2022-12-11 23:14:45,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-11 23:14:45,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 23:14:45,773 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 23:14:45,780 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 23:14:45,808 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-11 23:14:45,808 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-11 23:14:45,809 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-11 23:14:45,809 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-11 23:14:45,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-11 23:14:45,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-11 23:14:45,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-11 23:14:45,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-11 23:14:45,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-11 23:14:45,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-11 23:14:45,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-11 23:14:45,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-11 23:14:45,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-11 23:14:45,810 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 23:14:45,901 INFO L236 CfgBuilder]: Building ICFG [2022-12-11 23:14:45,903 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-11 23:14:46,096 INFO L277 CfgBuilder]: Performing block encoding [2022-12-11 23:14:46,110 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-11 23:14:46,110 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-11 23:14:46,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.12 11:14:46 BoogieIcfgContainer [2022-12-11 23:14:46,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-11 23:14:46,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-11 23:14:46,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-11 23:14:46,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-11 23:14:46,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.12 11:14:45" (1/3) ... [2022-12-11 23:14:46,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea2a273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.12 11:14:46, skipping insertion in model container [2022-12-11 23:14:46,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 11:14:45" (2/3) ... [2022-12-11 23:14:46,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea2a273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.12 11:14:46, skipping insertion in model container [2022-12-11 23:14:46,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.12 11:14:46" (3/3) ... [2022-12-11 23:14:46,117 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-6.i [2022-12-11 23:14:46,129 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-11 23:14:46,130 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-11 23:14:46,130 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-11 23:14:46,175 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-11 23:14:46,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 93 transitions, 196 flow [2022-12-11 23:14:46,227 INFO L130 PetriNetUnfolder]: 7/91 cut-off events. [2022-12-11 23:14:46,228 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-11 23:14:46,232 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 23:14:46,232 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 93 transitions, 196 flow [2022-12-11 23:14:46,235 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 91 transitions, 188 flow [2022-12-11 23:14:46,241 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-11 23:14:46,246 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;@33ae9dc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-11 23:14:46,246 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-11 23:14:46,262 INFO L130 PetriNetUnfolder]: 6/81 cut-off events. [2022-12-11 23:14:46,262 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-11 23:14:46,262 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 23:14:46,262 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 23:14:46,263 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 23:14:46,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 23:14:46,267 INFO L85 PathProgramCache]: Analyzing trace with hash 95801150, now seen corresponding path program 1 times [2022-12-11 23:14:46,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 23:14:46,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657373533] [2022-12-11 23:14:46,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 23:14:46,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 23:14:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 23:14:46,548 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 23:14:46,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 23:14:46,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657373533] [2022-12-11 23:14:46,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657373533] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 23:14:46,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 23:14:46,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-11 23:14:46,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958123789] [2022-12-11 23:14:46,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 23:14:46,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-11 23:14:46,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 23:14:46,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-11 23:14:46,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-11 23:14:46,599 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 93 [2022-12-11 23:14:46,602 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 23:14:46,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 23:14:46,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 93 [2022-12-11 23:14:46,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 23:14:46,663 INFO L130 PetriNetUnfolder]: 3/92 cut-off events. [2022-12-11 23:14:46,663 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-11 23:14:46,664 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 23:14:46,665 INFO L137 encePairwiseOnDemand]: 86/93 looper letters, 9 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2022-12-11 23:14:46,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 89 transitions, 206 flow [2022-12-11 23:14:46,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-11 23:14:46,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-11 23:14:46,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2022-12-11 23:14:46,674 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.9283154121863799 [2022-12-11 23:14:46,677 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 1 predicate places. [2022-12-11 23:14:46,677 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 89 transitions, 206 flow [2022-12-11 23:14:46,678 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 89 transitions, 206 flow [2022-12-11 23:14:46,679 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 206 flow [2022-12-11 23:14:46,679 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 23:14:46,679 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 23:14:46,679 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 23:14:46,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-11 23:14:46,680 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 23:14:46,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 23:14:46,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1875915451, now seen corresponding path program 1 times [2022-12-11 23:14:46,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 23:14:46,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828322899] [2022-12-11 23:14:46,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 23:14:46,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 23:14:46,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 23:14:46,804 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 23:14:46,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 23:14:46,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828322899] [2022-12-11 23:14:46,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828322899] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 23:14:46,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677853477] [2022-12-11 23:14:46,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 23:14:46,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 23:14:46,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 23:14:46,811 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 23:14:46,831 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 23:14:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 23:14:46,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-11 23:14:46,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 23:14:46,979 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 23:14:46,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 23:14:47,024 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 23:14:47,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677853477] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 23:14:47,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 23:14:47,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-11 23:14:47,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656737065] [2022-12-11 23:14:47,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 23:14:47,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-11 23:14:47,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 23:14:47,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-11 23:14:47,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-11 23:14:47,028 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 93 [2022-12-11 23:14:47,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 206 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 23:14:47,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 23:14:47,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 93 [2022-12-11 23:14:47,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 23:14:47,110 INFO L130 PetriNetUnfolder]: 3/101 cut-off events. [2022-12-11 23:14:47,111 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-12-11 23:14:47,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 101 events. 3/101 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 105. Up to 10 conditions per place. [2022-12-11 23:14:47,115 INFO L137 encePairwiseOnDemand]: 87/93 looper letters, 10 selfloop transitions, 9 changer transitions 0/95 dead transitions. [2022-12-11 23:14:47,115 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 95 transitions, 264 flow [2022-12-11 23:14:47,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-11 23:14:47,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-11 23:14:47,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 723 transitions. [2022-12-11 23:14:47,121 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8637992831541219 [2022-12-11 23:14:47,121 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 9 predicate places. [2022-12-11 23:14:47,121 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 95 transitions, 264 flow [2022-12-11 23:14:47,125 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 95 transitions, 264 flow [2022-12-11 23:14:47,125 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 95 transitions, 264 flow [2022-12-11 23:14:47,125 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 23:14:47,125 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 23:14:47,126 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 23:14:47,146 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 23:14:47,331 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 23:14:47,331 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 23:14:47,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 23:14:47,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1869128357, now seen corresponding path program 2 times [2022-12-11 23:14:47,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 23:14:47,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406512322] [2022-12-11 23:14:47,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 23:14:47,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 23:14:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 23:14:47,529 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 23:14:47,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 23:14:47,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406512322] [2022-12-11 23:14:47,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406512322] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 23:14:47,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236810549] [2022-12-11 23:14:47,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-11 23:14:47,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 23:14:47,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 23:14:47,531 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 23:14:47,567 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 23:14:47,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-11 23:14:47,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 23:14:47,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-11 23:14:47,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 23:14:47,722 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 23:14:47,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 23:14:47,807 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 23:14:47,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236810549] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 23:14:47,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 23:14:47,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-11 23:14:47,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726019936] [2022-12-11 23:14:47,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 23:14:47,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-11 23:14:47,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 23:14:47,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-11 23:14:47,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-12-11 23:14:47,816 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 93 [2022-12-11 23:14:47,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 95 transitions, 264 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 23:14:47,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 23:14:47,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 93 [2022-12-11 23:14:47,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 23:14:47,971 INFO L130 PetriNetUnfolder]: 3/129 cut-off events. [2022-12-11 23:14:47,972 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-12-11 23:14:47,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 129 events. 3/129 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 194. Up to 22 conditions per place. [2022-12-11 23:14:47,973 INFO L137 encePairwiseOnDemand]: 87/93 looper letters, 14 selfloop transitions, 21 changer transitions 0/111 dead transitions. [2022-12-11 23:14:47,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 111 transitions, 422 flow [2022-12-11 23:14:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-11 23:14:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-11 23:14:47,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1677 transitions. [2022-12-11 23:14:47,976 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.858678955453149 [2022-12-11 23:14:47,977 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 29 predicate places. [2022-12-11 23:14:47,977 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 111 transitions, 422 flow [2022-12-11 23:14:47,978 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 111 transitions, 422 flow [2022-12-11 23:14:47,978 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 111 transitions, 422 flow [2022-12-11 23:14:47,979 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 23:14:47,979 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 23:14:47,979 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 23:14:47,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-11 23:14:48,184 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 23:14:48,184 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 23:14:48,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 23:14:48,185 INFO L85 PathProgramCache]: Analyzing trace with hash 526543515, now seen corresponding path program 3 times [2022-12-11 23:14:48,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 23:14:48,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376462904] [2022-12-11 23:14:48,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 23:14:48,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 23:14:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 23:14:48,380 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 23:14:48,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 23:14:48,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376462904] [2022-12-11 23:14:48,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376462904] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 23:14:48,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311711938] [2022-12-11 23:14:48,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-11 23:14:48,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 23:14:48,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 23:14:48,382 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 23:14:48,384 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 23:14:48,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-11 23:14:48,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 23:14:48,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-11 23:14:48,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 23:14:48,523 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 23:14:48,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 23:14:48,726 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 23:14:48,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311711938] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 23:14:48,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 23:14:48,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 31 [2022-12-11 23:14:48,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966983583] [2022-12-11 23:14:48,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 23:14:48,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-11 23:14:48,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 23:14:48,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-11 23:14:48,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2022-12-11 23:14:48,734 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 93 [2022-12-11 23:14:48,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 111 transitions, 422 flow. Second operand has 31 states, 31 states have (on average 80.06451612903226) internal successors, (2482), 31 states have internal predecessors, (2482), 0 states have call successors, (0), 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 23:14:48,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 23:14:48,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 93 [2022-12-11 23:14:48,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 23:14:49,060 INFO L130 PetriNetUnfolder]: 3/178 cut-off events. [2022-12-11 23:14:49,060 INFO L131 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2022-12-11 23:14:49,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 178 events. 3/178 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 381. Up to 43 conditions per place. [2022-12-11 23:14:49,062 INFO L137 encePairwiseOnDemand]: 87/93 looper letters, 21 selfloop transitions, 42 changer transitions 0/139 dead transitions. [2022-12-11 23:14:49,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 139 transitions, 758 flow [2022-12-11 23:14:49,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-11 23:14:49,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-12-11 23:14:49,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3346 transitions. [2022-12-11 23:14:49,067 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8566308243727598 [2022-12-11 23:14:49,067 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 70 predicate places. [2022-12-11 23:14:49,068 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 139 transitions, 758 flow [2022-12-11 23:14:49,069 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 139 transitions, 758 flow [2022-12-11 23:14:49,069 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 139 transitions, 758 flow [2022-12-11 23:14:49,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 80.06451612903226) internal successors, (2482), 31 states have internal predecessors, (2482), 0 states have call successors, (0), 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 23:14:49,070 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 23:14:49,070 INFO L214 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 14, 14, 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 23:14:49,089 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 23:14:49,275 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 23:14:49,276 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 23:14:49,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 23:14:49,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1164740830, now seen corresponding path program 4 times [2022-12-11 23:14:49,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 23:14:49,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793249099] [2022-12-11 23:14:49,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 23:14:49,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 23:14:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 23:14:51,243 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 23:14:51,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 23:14:51,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793249099] [2022-12-11 23:14:51,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793249099] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 23:14:51,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279466384] [2022-12-11 23:14:51,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-11 23:14:51,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 23:14:51,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 23:14:51,284 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 23:14:51,286 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 23:14:51,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-11 23:14:51,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 23:14:51,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-11 23:14:51,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 23:14:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 486 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 23:14:54,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 23:14:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 23:14:57,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279466384] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 23:14:57,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 23:14:57,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 145 [2022-12-11 23:14:57,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262490281] [2022-12-11 23:14:57,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 23:14:57,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-12-11 23:14:57,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 23:14:57,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-12-11 23:14:57,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1237, Invalid=19643, Unknown=0, NotChecked=0, Total=20880 [2022-12-11 23:14:57,517 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 93 [2022-12-11 23:14:57,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 139 transitions, 758 flow. Second operand has 145 states, 145 states have (on average 62.241379310344826) internal successors, (9025), 145 states have internal predecessors, (9025), 0 states have call successors, (0), 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 23:14:57,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 23:14:57,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 93 [2022-12-11 23:14:57,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 23:18:08,090 INFO L130 PetriNetUnfolder]: 35884/135442 cut-off events. [2022-12-11 23:18:08,091 INFO L131 PetriNetUnfolder]: For 8913/8913 co-relation queries the response was YES. [2022-12-11 23:18:08,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211921 conditions, 135442 events. 35884/135442 cut-off events. For 8913/8913 co-relation queries the response was YES. Maximal size of possible extension queue 2043. Compared 1988812 event pairs, 0 based on Foata normal form. 0/124361 useless extension candidates. Maximal degree in co-relation 211866. Up to 18118 conditions per place. [2022-12-11 23:18:08,903 INFO L137 encePairwiseOnDemand]: 76/93 looper letters, 1459 selfloop transitions, 2210 changer transitions 1200/4974 dead transitions. [2022-12-11 23:18:08,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1176 places, 4974 transitions, 20229 flow [2022-12-11 23:18:08,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1016 states. [2022-12-11 23:18:08,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1016 states. [2022-12-11 23:18:08,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 66942 transitions. [2022-12-11 23:18:08,957 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.7084709169418338 [2022-12-11 23:18:08,958 INFO L295 CegarLoopForPetriNet]: 91 programPoint places, 1085 predicate places. [2022-12-11 23:18:08,959 INFO L82 GeneralOperation]: Start removeDead. Operand has 1176 places, 4974 transitions, 20229 flow [2022-12-11 23:18:09,245 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 856 places, 3774 transitions, 15443 flow [2022-12-11 23:18:09,245 INFO L495 AbstractCegarLoop]: Abstraction has has 856 places, 3774 transitions, 15443 flow [2022-12-11 23:18:09,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 62.241379310344826) internal successors, (9025), 145 states have internal predecessors, (9025), 0 states have call successors, (0), 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 23:18:09,248 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 23:18:09,248 INFO L214 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 14, 14, 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 23:18:09,255 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 23:18:09,453 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 23:18:09,453 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 23:18:09,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 23:18:09,454 INFO L85 PathProgramCache]: Analyzing trace with hash 735225936, now seen corresponding path program 1 times [2022-12-11 23:18:09,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 23:18:09,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549260206] [2022-12-11 23:18:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 23:18:09,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 23:18:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 23:18:11,196 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 23:18:11,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 23:18:11,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549260206] [2022-12-11 23:18:11,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549260206] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 23:18:11,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867349462] [2022-12-11 23:18:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 23:18:11,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 23:18:11,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 23:18:11,198 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 23:18:11,200 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 23:18:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 23:18:11,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-11 23:18:11,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 23:18:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 486 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 23:18:14,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 23:18:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 23:18:18,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867349462] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 23:18:18,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 23:18:18,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 154 [2022-12-11 23:18:18,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458727741] [2022-12-11 23:18:18,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 23:18:18,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-12-11 23:18:18,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 23:18:18,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-12-11 23:18:18,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=22303, Unknown=0, NotChecked=0, Total=23562 [2022-12-11 23:18:18,039 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 93 [2022-12-11 23:18:18,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 856 places, 3774 transitions, 15443 flow. Second operand has 154 states, 154 states have (on average 62.23376623376623) internal successors, (9584), 154 states have internal predecessors, (9584), 0 states have call successors, (0), 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 23:18:18,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 23:18:18,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 93 [2022-12-11 23:18:18,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand