/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/stack_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-11 18:53:48,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-11 18:53:48,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-11 18:53:48,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-11 18:53:48,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-11 18:53:48,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-11 18:53:48,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-11 18:53:48,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-11 18:53:48,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-11 18:53:48,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-11 18:53:48,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-11 18:53:48,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-11 18:53:48,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-11 18:53:48,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-11 18:53:48,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-11 18:53:48,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-11 18:53:48,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-11 18:53:48,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-11 18:53:48,960 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-11 18:53:48,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-11 18:53:48,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-11 18:53:48,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-11 18:53:48,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-11 18:53:48,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-11 18:53:48,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-11 18:53:48,969 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-11 18:53:48,969 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-11 18:53:48,970 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-11 18:53:48,970 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-11 18:53:48,971 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-11 18:53:48,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-11 18:53:48,972 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-11 18:53:48,972 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-11 18:53:48,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-11 18:53:48,974 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-11 18:53:48,974 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-11 18:53:48,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-11 18:53:48,975 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-11 18:53:48,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-11 18:53:48,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-11 18:53:48,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-11 18:53:48,978 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 18:53:48,999 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-11 18:53:48,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-11 18:53:49,000 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-11 18:53:49,000 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-11 18:53:49,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-11 18:53:49,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-11 18:53:49,001 INFO L138 SettingsManager]: * Use SBE=true [2022-12-11 18:53:49,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-11 18:53:49,001 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-11 18:53:49,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-11 18:53:49,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-11 18:53:49,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-11 18:53:49,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-11 18:53:49,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-11 18:53:49,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-11 18:53:49,002 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-11 18:53:49,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-11 18:53:49,003 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-11 18:53:49,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-11 18:53:49,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-11 18:53:49,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-11 18:53:49,003 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-11 18:53:49,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-11 18:53:49,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-11 18:53:49,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-11 18:53:49,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-11 18:53:49,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-11 18:53:49,004 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-11 18:53:49,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-11 18:53:49,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-11 18:53:49,005 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-11 18:53:49,005 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-11 18:53:49,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-11 18:53:49,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-11 18:53:49,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-11 18:53:49,356 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-11 18:53:49,356 INFO L275 PluginConnector]: CDTParser initialized [2022-12-11 18:53:49,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-1.i [2022-12-11 18:53:50,494 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-11 18:53:50,789 INFO L351 CDTParser]: Found 1 translation units. [2022-12-11 18:53:50,790 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i [2022-12-11 18:53:50,803 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8a135c99/001228c62cb4424aa856d511a9b5eb92/FLAG216057dbf [2022-12-11 18:53:50,815 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8a135c99/001228c62cb4424aa856d511a9b5eb92 [2022-12-11 18:53:50,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-11 18:53:50,819 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-11 18:53:50,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-11 18:53:50,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-11 18:53:50,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-11 18:53:50,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.12 06:53:50" (1/1) ... [2022-12-11 18:53:50,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47454ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:53:50, skipping insertion in model container [2022-12-11 18:53:50,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.12 06:53:50" (1/1) ... [2022-12-11 18:53:50,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-11 18:53:50,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-11 18:53:51,331 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/stack_longest-1.i[41530,41543] [2022-12-11 18:53:51,364 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-11 18:53:51,376 INFO L203 MainTranslator]: Completed pre-run [2022-12-11 18:53:51,412 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/stack_longest-1.i[41530,41543] [2022-12-11 18:53:51,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-11 18:53:51,484 INFO L208 MainTranslator]: Completed translation [2022-12-11 18:53:51,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:53:51 WrapperNode [2022-12-11 18:53:51,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-11 18:53:51,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-11 18:53:51,488 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-11 18:53:51,488 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-11 18:53:51,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:53:51" (1/1) ... [2022-12-11 18:53:51,527 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:53:51" (1/1) ... [2022-12-11 18:53:51,561 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 155 [2022-12-11 18:53:51,562 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-11 18:53:51,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-11 18:53:51,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-11 18:53:51,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-11 18:53:51,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:53:51" (1/1) ... [2022-12-11 18:53:51,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:53:51" (1/1) ... [2022-12-11 18:53:51,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:53:51" (1/1) ... [2022-12-11 18:53:51,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:53:51" (1/1) ... [2022-12-11 18:53:51,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:53:51" (1/1) ... [2022-12-11 18:53:51,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:53:51" (1/1) ... [2022-12-11 18:53:51,599 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:53:51" (1/1) ... [2022-12-11 18:53:51,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:53:51" (1/1) ... [2022-12-11 18:53:51,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-11 18:53:51,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-11 18:53:51,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-11 18:53:51,616 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-11 18:53:51,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:53:51" (1/1) ... [2022-12-11 18:53:51,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-11 18:53:51,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 18:53:51,649 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-11 18:53:51,671 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 18:53:51,688 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-11 18:53:51,689 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-11 18:53:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-11 18:53:51,689 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-11 18:53:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-11 18:53:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-11 18:53:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-11 18:53:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-11 18:53:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-11 18:53:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-11 18:53:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-11 18:53:51,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-11 18:53:51,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-11 18:53:51,691 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 18:53:51,882 INFO L236 CfgBuilder]: Building ICFG [2022-12-11 18:53:51,883 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-11 18:53:52,097 INFO L277 CfgBuilder]: Performing block encoding [2022-12-11 18:53:52,105 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-11 18:53:52,105 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-11 18:53:52,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.12 06:53:52 BoogieIcfgContainer [2022-12-11 18:53:52,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-11 18:53:52,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-11 18:53:52,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-11 18:53:52,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-11 18:53:52,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.12 06:53:50" (1/3) ... [2022-12-11 18:53:52,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69ee29d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.12 06:53:52, skipping insertion in model container [2022-12-11 18:53:52,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 06:53:51" (2/3) ... [2022-12-11 18:53:52,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69ee29d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.12 06:53:52, skipping insertion in model container [2022-12-11 18:53:52,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.12 06:53:52" (3/3) ... [2022-12-11 18:53:52,131 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2022-12-11 18:53:52,162 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-11 18:53:52,163 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-11 18:53:52,163 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-11 18:53:52,337 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-11 18:53:52,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 157 transitions, 330 flow [2022-12-11 18:53:52,446 INFO L130 PetriNetUnfolder]: 10/155 cut-off events. [2022-12-11 18:53:52,447 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-11 18:53:52,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 155 events. 10/155 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 375 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 117. Up to 3 conditions per place. [2022-12-11 18:53:52,456 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 157 transitions, 330 flow [2022-12-11 18:53:52,465 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 146 transitions, 301 flow [2022-12-11 18:53:52,483 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-11 18:53:52,490 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;@2168197b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-11 18:53:52,491 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-11 18:53:52,555 INFO L130 PetriNetUnfolder]: 4/115 cut-off events. [2022-12-11 18:53:52,555 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-11 18:53:52,556 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:53:52,556 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] [2022-12-11 18:53:52,557 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 18:53:52,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:53:52,563 INFO L85 PathProgramCache]: Analyzing trace with hash -31759089, now seen corresponding path program 1 times [2022-12-11 18:53:52,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:53:52,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373136526] [2022-12-11 18:53:52,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:53:52,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:53:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:53:52,968 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 18:53:52,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:53:52,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373136526] [2022-12-11 18:53:52,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373136526] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 18:53:52,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 18:53:52,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-11 18:53:52,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286337619] [2022-12-11 18:53:52,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 18:53:52,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-11 18:53:52,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:53:53,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-11 18:53:53,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-11 18:53:53,027 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 157 [2022-12-11 18:53:53,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 146 transitions, 301 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 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 18:53:53,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:53:53,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 157 [2022-12-11 18:53:53,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:53:53,238 INFO L130 PetriNetUnfolder]: 91/770 cut-off events. [2022-12-11 18:53:53,239 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-12-11 18:53:53,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 932 conditions, 770 events. 91/770 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4583 event pairs, 15 based on Foata normal form. 62/761 useless extension candidates. Maximal degree in co-relation 795. Up to 96 conditions per place. [2022-12-11 18:53:53,250 INFO L137 encePairwiseOnDemand]: 148/157 looper letters, 19 selfloop transitions, 3 changer transitions 0/146 dead transitions. [2022-12-11 18:53:53,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 146 transitions, 351 flow [2022-12-11 18:53:53,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-11 18:53:53,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-11 18:53:53,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2022-12-11 18:53:53,271 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.9341825902335457 [2022-12-11 18:53:53,273 INFO L175 Difference]: Start difference. First operand has 143 places, 146 transitions, 301 flow. Second operand 3 states and 440 transitions. [2022-12-11 18:53:53,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 146 transitions, 351 flow [2022-12-11 18:53:53,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 146 transitions, 343 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-11 18:53:53,286 INFO L231 Difference]: Finished difference. Result has 139 places, 139 transitions, 297 flow [2022-12-11 18:53:53,288 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=297, PETRI_PLACES=139, PETRI_TRANSITIONS=139} [2022-12-11 18:53:53,292 INFO L295 CegarLoopForPetriNet]: 143 programPoint places, -4 predicate places. [2022-12-11 18:53:53,292 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 139 transitions, 297 flow [2022-12-11 18:53:53,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 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 18:53:53,293 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:53:53,293 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 18:53:53,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-11 18:53:53,294 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 18:53:53,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:53:53,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1416984035, now seen corresponding path program 1 times [2022-12-11 18:53:53,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:53:53,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142132931] [2022-12-11 18:53:53,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:53:53,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:53:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:53:53,473 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 18:53:53,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:53:53,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142132931] [2022-12-11 18:53:53,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142132931] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 18:53:53,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 18:53:53,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-11 18:53:53,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453663723] [2022-12-11 18:53:53,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 18:53:53,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-11 18:53:53,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:53:53,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-11 18:53:53,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-11 18:53:53,477 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 157 [2022-12-11 18:53:53,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 139 transitions, 297 flow. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 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 18:53:53,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:53:53,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 157 [2022-12-11 18:53:53,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:53:53,540 INFO L130 PetriNetUnfolder]: 21/352 cut-off events. [2022-12-11 18:53:53,540 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-11 18:53:53,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 352 events. 21/352 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1139 event pairs, 4 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 318. Up to 16 conditions per place. [2022-12-11 18:53:53,543 INFO L137 encePairwiseOnDemand]: 154/157 looper letters, 9 selfloop transitions, 2 changer transitions 0/142 dead transitions. [2022-12-11 18:53:53,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 142 transitions, 325 flow [2022-12-11 18:53:53,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-11 18:53:53,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-11 18:53:53,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 438 transitions. [2022-12-11 18:53:53,546 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.9299363057324841 [2022-12-11 18:53:53,548 INFO L175 Difference]: Start difference. First operand has 139 places, 139 transitions, 297 flow. Second operand 3 states and 438 transitions. [2022-12-11 18:53:53,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 142 transitions, 325 flow [2022-12-11 18:53:53,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 142 transitions, 323 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-11 18:53:53,559 INFO L231 Difference]: Finished difference. Result has 141 places, 139 transitions, 302 flow [2022-12-11 18:53:53,559 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=302, PETRI_PLACES=141, PETRI_TRANSITIONS=139} [2022-12-11 18:53:53,560 INFO L295 CegarLoopForPetriNet]: 143 programPoint places, -2 predicate places. [2022-12-11 18:53:53,560 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 139 transitions, 302 flow [2022-12-11 18:53:53,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 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 18:53:53,561 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:53:53,561 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, 1, 1, 1, 1, 1] [2022-12-11 18:53:53,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-11 18:53:53,561 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 18:53:53,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:53:53,562 INFO L85 PathProgramCache]: Analyzing trace with hash -453123432, now seen corresponding path program 1 times [2022-12-11 18:53:53,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:53:53,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021556762] [2022-12-11 18:53:53,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:53:53,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:53:53,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:53:53,759 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 18:53:53,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:53:53,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021556762] [2022-12-11 18:53:53,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021556762] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 18:53:53,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 18:53:53,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-11 18:53:53,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412687284] [2022-12-11 18:53:53,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 18:53:53,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-11 18:53:53,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:53:53,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-11 18:53:53,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-11 18:53:53,762 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 157 [2022-12-11 18:53:53,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 139 transitions, 302 flow. Second operand has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 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 18:53:53,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:53:53,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 157 [2022-12-11 18:53:53,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:53:53,867 INFO L130 PetriNetUnfolder]: 41/450 cut-off events. [2022-12-11 18:53:53,868 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-12-11 18:53:53,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 450 events. 41/450 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1783 event pairs, 13 based on Foata normal form. 0/418 useless extension candidates. Maximal degree in co-relation 361. Up to 37 conditions per place. [2022-12-11 18:53:53,872 INFO L137 encePairwiseOnDemand]: 152/157 looper letters, 16 selfloop transitions, 4 changer transitions 0/147 dead transitions. [2022-12-11 18:53:53,872 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 147 transitions, 363 flow [2022-12-11 18:53:53,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-11 18:53:53,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-11 18:53:53,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 569 transitions. [2022-12-11 18:53:53,874 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.9060509554140127 [2022-12-11 18:53:53,874 INFO L175 Difference]: Start difference. First operand has 141 places, 139 transitions, 302 flow. Second operand 4 states and 569 transitions. [2022-12-11 18:53:53,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 147 transitions, 363 flow [2022-12-11 18:53:53,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 147 transitions, 361 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-11 18:53:53,881 INFO L231 Difference]: Finished difference. Result has 145 places, 142 transitions, 328 flow [2022-12-11 18:53:53,882 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=328, PETRI_PLACES=145, PETRI_TRANSITIONS=142} [2022-12-11 18:53:53,883 INFO L295 CegarLoopForPetriNet]: 143 programPoint places, 2 predicate places. [2022-12-11 18:53:53,884 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 142 transitions, 328 flow [2022-12-11 18:53:53,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 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 18:53:53,885 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:53:53,886 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:53:53,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-11 18:53:53,886 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 18:53:53,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:53:53,887 INFO L85 PathProgramCache]: Analyzing trace with hash 337342643, now seen corresponding path program 1 times [2022-12-11 18:53:53,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:53:53,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824926609] [2022-12-11 18:53:53,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:53:53,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:53:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:53:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:53:54,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:53:54,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824926609] [2022-12-11 18:53:54,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824926609] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 18:53:54,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255563731] [2022-12-11 18:53:54,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:53:54,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 18:53:54,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 18:53:54,137 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 18:53:54,138 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 18:53:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:53:54,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-11 18:53:54,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 18:53:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:53:54,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 18:53:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 18:53:54,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255563731] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 18:53:54,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 18:53:54,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-11 18:53:54,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800213202] [2022-12-11 18:53:54,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 18:53:54,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-11 18:53:54,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:53:54,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-11 18:53:54,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-11 18:53:54,570 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 157 [2022-12-11 18:53:54,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 142 transitions, 328 flow. Second operand has 10 states, 10 states have (on average 136.5) internal successors, (1365), 10 states have internal predecessors, (1365), 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 18:53:54,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:53:54,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 157 [2022-12-11 18:53:54,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:53:54,903 INFO L130 PetriNetUnfolder]: 183/1470 cut-off events. [2022-12-11 18:53:54,904 INFO L131 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2022-12-11 18:53:54,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2015 conditions, 1470 events. 183/1470 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 9613 event pairs, 29 based on Foata normal form. 9/1376 useless extension candidates. Maximal degree in co-relation 1575. Up to 134 conditions per place. [2022-12-11 18:53:54,916 INFO L137 encePairwiseOnDemand]: 151/157 looper letters, 48 selfloop transitions, 14 changer transitions 0/188 dead transitions. [2022-12-11 18:53:54,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 188 transitions, 577 flow [2022-12-11 18:53:54,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-11 18:53:54,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-11 18:53:54,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1404 transitions. [2022-12-11 18:53:54,920 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8942675159235669 [2022-12-11 18:53:54,920 INFO L175 Difference]: Start difference. First operand has 145 places, 142 transitions, 328 flow. Second operand 10 states and 1404 transitions. [2022-12-11 18:53:54,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 188 transitions, 577 flow [2022-12-11 18:53:54,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 188 transitions, 575 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-11 18:53:54,927 INFO L231 Difference]: Finished difference. Result has 156 places, 155 transitions, 420 flow [2022-12-11 18:53:54,928 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=420, PETRI_PLACES=156, PETRI_TRANSITIONS=155} [2022-12-11 18:53:54,929 INFO L295 CegarLoopForPetriNet]: 143 programPoint places, 13 predicate places. [2022-12-11 18:53:54,929 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 155 transitions, 420 flow [2022-12-11 18:53:54,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 136.5) internal successors, (1365), 10 states have internal predecessors, (1365), 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 18:53:54,930 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:53:54,930 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:53:54,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-11 18:53:55,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 18:53:55,135 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 18:53:55,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:53:55,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1774647398, now seen corresponding path program 1 times [2022-12-11 18:53:55,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:53:55,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335773453] [2022-12-11 18:53:55,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:53:55,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:53:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:53:55,273 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 18:53:55,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:53:55,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335773453] [2022-12-11 18:53:55,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335773453] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 18:53:55,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 18:53:55,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-11 18:53:55,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028458777] [2022-12-11 18:53:55,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 18:53:55,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-11 18:53:55,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:53:55,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-11 18:53:55,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-11 18:53:55,276 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 157 [2022-12-11 18:53:55,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 155 transitions, 420 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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 18:53:55,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:53:55,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 157 [2022-12-11 18:53:55,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:53:55,439 INFO L130 PetriNetUnfolder]: 53/907 cut-off events. [2022-12-11 18:53:55,439 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-12-11 18:53:55,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1203 conditions, 907 events. 53/907 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4018 event pairs, 10 based on Foata normal form. 11/873 useless extension candidates. Maximal degree in co-relation 728. Up to 46 conditions per place. [2022-12-11 18:53:55,444 INFO L137 encePairwiseOnDemand]: 153/157 looper letters, 12 selfloop transitions, 4 changer transitions 0/152 dead transitions. [2022-12-11 18:53:55,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 152 transitions, 431 flow [2022-12-11 18:53:55,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-11 18:53:55,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-11 18:53:55,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 423 transitions. [2022-12-11 18:53:55,445 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8980891719745223 [2022-12-11 18:53:55,445 INFO L175 Difference]: Start difference. First operand has 156 places, 155 transitions, 420 flow. Second operand 3 states and 423 transitions. [2022-12-11 18:53:55,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 152 transitions, 431 flow [2022-12-11 18:53:55,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 152 transitions, 419 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-12-11 18:53:55,451 INFO L231 Difference]: Finished difference. Result has 156 places, 150 transitions, 388 flow [2022-12-11 18:53:55,451 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=388, PETRI_PLACES=156, PETRI_TRANSITIONS=150} [2022-12-11 18:53:55,453 INFO L295 CegarLoopForPetriNet]: 143 programPoint places, 13 predicate places. [2022-12-11 18:53:55,453 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 150 transitions, 388 flow [2022-12-11 18:53:55,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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 18:53:55,454 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:53:55,454 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:53:55,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-11 18:53:55,454 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 18:53:55,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:53:55,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1643745786, now seen corresponding path program 1 times [2022-12-11 18:53:55,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:53:55,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361972642] [2022-12-11 18:53:55,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:53:55,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:53:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:53:55,600 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 18:53:55,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:53:55,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361972642] [2022-12-11 18:53:55,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361972642] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 18:53:55,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 18:53:55,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-11 18:53:55,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883194974] [2022-12-11 18:53:55,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 18:53:55,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-11 18:53:55,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:53:55,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-11 18:53:55,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-11 18:53:55,603 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 157 [2022-12-11 18:53:55,604 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 150 transitions, 388 flow. Second operand has 7 states, 7 states have (on average 126.28571428571429) internal successors, (884), 7 states have internal predecessors, (884), 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 18:53:55,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:53:55,604 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 157 [2022-12-11 18:53:55,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:53:55,877 INFO L130 PetriNetUnfolder]: 119/1046 cut-off events. [2022-12-11 18:53:55,877 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2022-12-11 18:53:55,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1653 conditions, 1046 events. 119/1046 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5305 event pairs, 19 based on Foata normal form. 0/997 useless extension candidates. Maximal degree in co-relation 1104. Up to 178 conditions per place. [2022-12-11 18:53:55,884 INFO L137 encePairwiseOnDemand]: 146/157 looper letters, 49 selfloop transitions, 13 changer transitions 0/178 dead transitions. [2022-12-11 18:53:55,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 178 transitions, 597 flow [2022-12-11 18:53:55,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-11 18:53:55,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-11 18:53:55,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1173 transitions. [2022-12-11 18:53:55,888 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8301486199575372 [2022-12-11 18:53:55,888 INFO L175 Difference]: Start difference. First operand has 156 places, 150 transitions, 388 flow. Second operand 9 states and 1173 transitions. [2022-12-11 18:53:55,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 178 transitions, 597 flow [2022-12-11 18:53:55,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 178 transitions, 593 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-11 18:53:55,892 INFO L231 Difference]: Finished difference. Result has 168 places, 157 transitions, 472 flow [2022-12-11 18:53:55,893 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=472, PETRI_PLACES=168, PETRI_TRANSITIONS=157} [2022-12-11 18:53:55,893 INFO L295 CegarLoopForPetriNet]: 143 programPoint places, 25 predicate places. [2022-12-11 18:53:55,893 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 157 transitions, 472 flow [2022-12-11 18:53:55,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 126.28571428571429) internal successors, (884), 7 states have internal predecessors, (884), 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 18:53:55,894 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:53:55,895 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:53:55,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-11 18:53:55,895 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 18:53:55,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:53:55,895 INFO L85 PathProgramCache]: Analyzing trace with hash -2107797601, now seen corresponding path program 1 times [2022-12-11 18:53:55,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:53:55,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394949926] [2022-12-11 18:53:55,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:53:55,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:53:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:53:57,979 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 18:53:57,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:53:57,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394949926] [2022-12-11 18:53:57,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394949926] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 18:53:57,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 18:53:57,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-12-11 18:53:57,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194371891] [2022-12-11 18:53:57,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 18:53:57,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-11 18:53:57,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:53:57,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-11 18:53:57,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2022-12-11 18:53:57,984 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 157 [2022-12-11 18:53:57,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 157 transitions, 472 flow. Second operand has 29 states, 29 states have (on average 73.27586206896552) internal successors, (2125), 29 states have internal predecessors, (2125), 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 18:53:57,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:53:57,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 157 [2022-12-11 18:53:57,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:54:00,729 INFO L130 PetriNetUnfolder]: 999/3525 cut-off events. [2022-12-11 18:54:00,729 INFO L131 PetriNetUnfolder]: For 532/535 co-relation queries the response was YES. [2022-12-11 18:54:00,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6918 conditions, 3525 events. 999/3525 cut-off events. For 532/535 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 25644 event pairs, 273 based on Foata normal form. 1/3390 useless extension candidates. Maximal degree in co-relation 4085. Up to 1516 conditions per place. [2022-12-11 18:54:00,753 INFO L137 encePairwiseOnDemand]: 121/157 looper letters, 231 selfloop transitions, 38 changer transitions 4/341 dead transitions. [2022-12-11 18:54:00,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 341 transitions, 1506 flow [2022-12-11 18:54:00,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-11 18:54:00,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-11 18:54:00,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2530 transitions. [2022-12-11 18:54:00,760 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5035828025477707 [2022-12-11 18:54:00,761 INFO L175 Difference]: Start difference. First operand has 168 places, 157 transitions, 472 flow. Second operand 32 states and 2530 transitions. [2022-12-11 18:54:00,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 341 transitions, 1506 flow [2022-12-11 18:54:00,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 341 transitions, 1493 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-12-11 18:54:00,771 INFO L231 Difference]: Finished difference. Result has 220 places, 187 transitions, 732 flow [2022-12-11 18:54:00,772 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=732, PETRI_PLACES=220, PETRI_TRANSITIONS=187} [2022-12-11 18:54:00,772 INFO L295 CegarLoopForPetriNet]: 143 programPoint places, 77 predicate places. [2022-12-11 18:54:00,773 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 187 transitions, 732 flow [2022-12-11 18:54:00,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 73.27586206896552) internal successors, (2125), 29 states have internal predecessors, (2125), 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 18:54:00,775 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:54:00,775 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:54:00,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-11 18:54:00,775 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 18:54:00,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:54:00,776 INFO L85 PathProgramCache]: Analyzing trace with hash 462110097, now seen corresponding path program 2 times [2022-12-11 18:54:00,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:54:00,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809601659] [2022-12-11 18:54:00,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:54:00,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:54:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 18:54:02,321 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 18:54:02,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 18:54:02,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809601659] [2022-12-11 18:54:02,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809601659] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 18:54:02,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 18:54:02,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-12-11 18:54:02,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095509773] [2022-12-11 18:54:02,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 18:54:02,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-11 18:54:02,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 18:54:02,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-11 18:54:02,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-12-11 18:54:02,326 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 157 [2022-12-11 18:54:02,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 187 transitions, 732 flow. Second operand has 29 states, 29 states have (on average 73.27586206896552) internal successors, (2125), 29 states have internal predecessors, (2125), 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 18:54:02,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 18:54:02,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 157 [2022-12-11 18:54:02,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 18:54:05,551 INFO L130 PetriNetUnfolder]: 1157/3992 cut-off events. [2022-12-11 18:54:05,551 INFO L131 PetriNetUnfolder]: For 1174/1177 co-relation queries the response was YES. [2022-12-11 18:54:05,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9229 conditions, 3992 events. 1157/3992 cut-off events. For 1174/1177 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 30235 event pairs, 118 based on Foata normal form. 4/3915 useless extension candidates. Maximal degree in co-relation 5229. Up to 1305 conditions per place. [2022-12-11 18:54:05,588 INFO L137 encePairwiseOnDemand]: 122/157 looper letters, 236 selfloop transitions, 56 changer transitions 4/364 dead transitions. [2022-12-11 18:54:05,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 364 transitions, 1943 flow [2022-12-11 18:54:05,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-11 18:54:05,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-11 18:54:05,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2678 transitions. [2022-12-11 18:54:05,596 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5016860247283627 [2022-12-11 18:54:05,596 INFO L175 Difference]: Start difference. First operand has 220 places, 187 transitions, 732 flow. Second operand 34 states and 2678 transitions. [2022-12-11 18:54:05,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 364 transitions, 1943 flow [2022-12-11 18:54:05,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 364 transitions, 1923 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-11 18:54:05,610 INFO L231 Difference]: Finished difference. Result has 258 places, 206 transitions, 1012 flow [2022-12-11 18:54:05,611 INFO L277 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1012, PETRI_PLACES=258, PETRI_TRANSITIONS=206} [2022-12-11 18:54:05,613 INFO L295 CegarLoopForPetriNet]: 143 programPoint places, 115 predicate places. [2022-12-11 18:54:05,613 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 206 transitions, 1012 flow [2022-12-11 18:54:05,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 73.27586206896552) internal successors, (2125), 29 states have internal predecessors, (2125), 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 18:54:05,615 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 18:54:05,615 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:54:05,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-11 18:54:05,616 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 18:54:05,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 18:54:05,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1678779589, now seen corresponding path program 1 times [2022-12-11 18:54:05,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 18:54:05,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867844813] [2022-12-11 18:54:05,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 18:54:05,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 18:54:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-11 18:54:05,651 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-11 18:54:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-11 18:54:05,722 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-11 18:54:05,723 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-11 18:54:05,724 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2022-12-11 18:54:05,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2022-12-11 18:54:05,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-12-11 18:54:05,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-11 18:54:05,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-11 18:54:05,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-11 18:54:05,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-11 18:54:05,727 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 18:54:05,775 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-11 18:54:05,775 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-11 18:54:05,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.12 06:54:05 BasicIcfg [2022-12-11 18:54:05,903 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-11 18:54:05,904 INFO L158 Benchmark]: Toolchain (without parser) took 15085.27ms. Allocated memory was 183.5MB in the beginning and 339.7MB in the end (delta: 156.2MB). Free memory was 157.5MB in the beginning and 222.1MB in the end (delta: -64.6MB). Peak memory consumption was 164.5MB. Max. memory is 8.0GB. [2022-12-11 18:54:05,904 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 183.5MB. Free memory is still 160.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-11 18:54:05,904 INFO L158 Benchmark]: CACSL2BoogieTranslator took 667.17ms. Allocated memory is still 183.5MB. Free memory was 157.0MB in the beginning and 128.1MB in the end (delta: 28.9MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB. [2022-12-11 18:54:05,905 INFO L158 Benchmark]: Boogie Procedure Inliner took 73.72ms. Allocated memory is still 183.5MB. Free memory was 128.1MB in the beginning and 125.5MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-11 18:54:05,905 INFO L158 Benchmark]: Boogie Preprocessor took 52.76ms. Allocated memory is still 183.5MB. Free memory was 125.5MB in the beginning and 123.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-11 18:54:05,905 INFO L158 Benchmark]: RCFGBuilder took 491.64ms. Allocated memory is still 183.5MB. Free memory was 123.4MB in the beginning and 105.6MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2022-12-11 18:54:05,905 INFO L158 Benchmark]: TraceAbstraction took 13794.12ms. Allocated memory was 183.5MB in the beginning and 339.7MB in the end (delta: 156.2MB). Free memory was 104.6MB in the beginning and 222.1MB in the end (delta: -117.5MB). Peak memory consumption was 112.1MB. Max. memory is 8.0GB. [2022-12-11 18:54:05,908 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 183.5MB. Free memory is still 160.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 667.17ms. Allocated memory is still 183.5MB. Free memory was 157.0MB in the beginning and 128.1MB in the end (delta: 28.9MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 73.72ms. Allocated memory is still 183.5MB. Free memory was 128.1MB in the beginning and 125.5MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 52.76ms. Allocated memory is still 183.5MB. Free memory was 125.5MB in the beginning and 123.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 491.64ms. Allocated memory is still 183.5MB. Free memory was 123.4MB in the beginning and 105.6MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * TraceAbstraction took 13794.12ms. Allocated memory was 183.5MB in the beginning and 339.7MB in the end (delta: 156.2MB). Free memory was 104.6MB in the beginning and 222.1MB in the end (delta: -117.5MB). Peak memory consumption was 112.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 941]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; VAL [top=0] [L936] 0 static unsigned int arr[(800)]; VAL [arr={3:0}, top=0] [L937] 0 pthread_mutex_t m; VAL [arr={3:0}, m={4:0}, top=0] [L938] 0 _Bool flag=(0); VAL [arr={3:0}, flag=0, m={4:0}, top=0] [L1020] 0 pthread_t id1, id2; VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, top=0] [L1022] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=9, top=0] [L989] 1 int i; VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, m={4:0}, top=0] [L990] 1 unsigned int tmp; VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, m={4:0}, top=0] [L991] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L991] COND TRUE 1 i<(800) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L994] 1 tmp = __VERIFIER_nondet_uint() VAL [__VERIFIER_nondet_uint()=4294967302, arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, tmp=6, top=0] [L995] CALL 1 assume_abort_if_not(tmp < (800)) [L1023] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=10, top=0] [L23] COND FALSE 1 !(!cond) VAL [\old(cond)=1, arr={3:0}, cond=1, flag=0, m={4:0}, top=0] [L995] RET 1 assume_abort_if_not(tmp < (800)) [L996] CALL, EXPR 1 push(arr,tmp) [L961] COND FALSE 1 !(top==(800)) [L968] CALL, EXPR 1 get_top() [L953] 1 return top; VAL [\result=0, arr={3:0}, flag=0, m={4:0}, top=0] [L968] RET, EXPR 1 get_top() [L968] 1 stack[get_top()] = x VAL [\old(x)=6, arr={3:0}, flag=0, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=6] [L969] CALL 1 inc_top() [L945] 1 top++ VAL [arr={3:0}, flag=0, m={4:0}, top=1] [L969] RET 1 inc_top() [L971] 1 return 0; VAL [\old(x)=6, \result=0, arr={3:0}, flag=0, m={4:0}, stack={3:0}, stack={3:0}, top=1, x=6] [L996] RET, EXPR 1 push(arr,tmp) [L996] COND FALSE 1 !(push(arr,tmp)==(-1)) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, push(arr,tmp)=0, tmp=6, top=1] [L998] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=6, top=1] [L1005] 2 int i; VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, m={4:0}, top=1] [L1006] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1006] COND TRUE 2 i<(800) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; VAL [\result=0, \result=1, arr={3:0}, flag=1, m={4:0}, top=1] [L975] RET, EXPR 2 get_top() [L975] COND FALSE 2 !(get_top()==0) VAL [arr={3:0}, flag=1, get_top()=1, m={4:0}, stack={3:0}, stack={3:0}, top=1] [L982] CALL 2 dec_top() [L949] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L982] RET 2 dec_top() [L983] CALL, EXPR 2 get_top() [L953] 2 return top; VAL [\result=0, \result=0, arr={3:0}, flag=1, m={4:0}, top=0] [L983] RET, EXPR 2 get_top() [L983] EXPR 2 stack[get_top()] VAL [arr={3:0}, flag=1, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, stack[get_top()]=6, top=0] [L983] 2 return stack[get_top()]; VAL [\result=6, arr={3:0}, flag=1, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, stack[get_top()]=6, top=0] [L1011] RET, EXPR 2 pop(arr) [L1011] COND FALSE 2 !(!(pop(arr)!=(-2))) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, pop(arr)=6, top=0] [L1006] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1006] COND TRUE 2 i<(800) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1009] COND TRUE 2 \read(flag) [L1011] CALL, EXPR 2 pop(arr) [L975] CALL, EXPR 2 get_top() [L953] 2 return top; VAL [\result=0, \result=0, arr={3:0}, flag=1, m={4:0}, top=0] [L975] RET, EXPR 2 get_top() [L975] COND TRUE 2 get_top()==0 VAL [arr={3:0}, flag=1, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, top=0] [L978] 2 return (-2); VAL [\result=-2, arr={3:0}, flag=1, m={4:0}, stack={3:0}, stack={3:0}, top=0] [L1011] RET, EXPR 2 pop(arr) [L1011] COND TRUE 2 !(pop(arr)!=(-2)) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, pop(arr)=-2, top=0] [L1012] CALL 2 error() [L941] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 941]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 248 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.1s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 13.4s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1039 SdHoareTripleChecker+Valid, 2.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1039 mSDsluCounter, 2062 SdHoareTripleChecker+Invalid, 1.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1912 mSDsCounter, 36 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4153 IncrementalHoareTripleChecker+Invalid, 4189 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 36 mSolverCounterUnsat, 150 mSDtfsCounter, 4153 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 318 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1012occurred in iteration=8, InterpolantAutomatonStates: 98, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 876 NumberOfCodeBlocks, 876 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 827 ConstructedInterpolants, 0 QuantifiedInterpolants, 5775 SizeOfPredicates, 2 NumberOfNonLiveVariables, 224 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 9/54 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-11 18:54:05,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...